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Pelagicheskie ryby ryby obitayushie v pelagicheskoj zone okeanov ili ozyor v otlichie ot donnyh kotorye zhivut na dne ili u dna i rifovyh svyazannyh s pribrezhnoj zonoj Staya krupnyh pelagicheskih angl zheltopyoryh karanksov presleduet kosyak anchousov Morskie pelagicheskie vody krupnejshaya akvatoriya na Zemle obyom kotoroj po raznym ocenkam sostavlyaet 1370 millionov kubicheskih kilometrov Ona sluzhit sredoj obitaniya dlya bolee 11 izvestnyh nyne vidov ryb Srednyaya glubina okeanov sostavlyaet 4000 m Svyshe 98 obyoma vody nahoditsya glubzhe 100 m a bolee 75 glubzhe 1000 m Morskih pelagicheskih ryb mozhno razdelit na okeanicheskih i pribrezhnyh Pribrezhnye ryby naselyayut melkovode nad kontinentalnym shelfom kuda pronikaet solnechnyj svet Okeanicheskie obitayut v bolee glubokih i obshirnyh vodah za kontinentalnym shelfom hotya inogda zaplyvayut v pribrezhnuyu zonu Razmer pelagicheskih ryb kolebletsya ot melkih angl takih kak seldi i sardiny do krupnyh hishnikov zanimayushih vershinu pishevoj piramidy naprimer tuncov i okeanicheskih akul Kak pravilo pelagicheskie ryby otlichnye plovcy oni stremitelno skolzyat v plotnyh sloyah vody U mnogih telo imeet veretenoobraznuyu ili torpedoobraznuyu formu pozvolyayushuyu im razvivat v vode vysokuyu skorost i preodolevat bolshie rasstoyaniya Parusnik sposoben razvit skorost do 109 km ch a nekotorye vidy tuncov peresekayut Tihij okean Mnogie pelagicheskie ryby obrazuyut gigantskie kosyaki massoj svyshe tysyachi tonn Drugie podobno rybe lune chya massa dostigaet 2 tonn vedut odinochnyj obraz zhizni U pelagicheskih ryb plotnoe telo oni imeyut otricatelnuyu plavuchest Pochti u vseh vidov za redkim isklyucheniem imeetsya plavatelnyj puzyr zapolnennyj gazovoj smesyu nizkoj plotnosti Blagodarya puzyryu telo pelagicheskih ryb obretaet nejtralnuyu ili polozhitelnuyu plavuchest V Mirovom okeane ryby s plavatelnym puzyryom vstrechayutsya na glubine do 7000 m U pelagicheskih ryb plavatelnyj puzyr vypolnyaet takzhe gidrostaticheskuyu funkciyu U krupnyh epipelagicheskih hishnikov takih kak obyknovennyj tunec serpovidnyj hvost i gladkoe veretenoobraznoe telo suzhayusheesya k oboim koncam Spinka tyomnaya a bryushko svetloeEkologicheskie tipyPelagicheskih ryb mozhno razdelit na dva tipa Pervyj aktivnye hishniki kotorye ohotyatsya na stajnyh ili odinochnyh ryb srednego ili nebolshogo razmera Obychno oni derzhatsya poodinochke ili nebolshimi gruppami sobirayas v stai pri obnaruzhenii dobychi U nih horosho razvity organy chuvstv i dovolno slozhnoe povedenie Tipichnye predstaviteli etogo tipa sinyaya akula mako tuncy mech ryba parusnik Vtoroj tip pastbishniki nomady kotorye sovershayut migracii i pitayutsya planktonom i melkimi pelagicheskimi rybami Eto gigantskaya akula manty i ryba luna U melkih kormovyh epipelagicheskih ryb naprimer atlanticheskoj seldi forma tela shodna s formoj tela hishnikovEpipelagicheskie rybyEpipelagicheskie ryby obitayut v epipelagicheskoj zone Eto verhnij sloj vody morya do glubiny 200 m nizhnyaya granica sublitorali Takzhe upominaetsya kak poverhnostnye vody i vklyuchaet v sebya evfoticheskuyu zonu Nizhnyaya granica evfoticheskoj zony prohodit na glubine na kotoruyu pronikaet 1 solnechnogo sveta i gde osveshyonnost sostavlyaet 400 lk Eta glubina zavisit ot mutnosti vody no v prozrachnoj vode prostiraetsya do 200 metrov i sovpadaet s granicami epipelagiali V evfoticheskoj zone dostatochno sveta dlya zhizni fitoplanktona i protekaniya fotosinteza Shema sloyov pelagiali Obshirnaya epipelagicheskaya zona sluzhit sredoj obitaniya mnogih pelagicheskih ryb Ona horosho osveshena tak chto hishniki mogut ohotitsya s pomoshyu zreniya Voda v nej aktivno peremeshivaetsya volnami i nasyshena kislorodom poetomu v nej horosho rastut vodorosli Odnako eto dovolno pustynnoe prostranstvo Odnoobrazie uslovij sredy obitaniya obuslavlivaet otsutstvie vidovogo raznoobraziya v etoj zone obitaet vsego 2 izvestnyh vidov ryb Na bolshej chasti epipelagiali dlya ryb slishkom malo korma poetomu epipelagicheskih ryb chashe mozhno vstretit v pribrezhnyh vodah nad kontinentalnym shelfom kuda libo apvelling prinosyat pitatelnye veshestva Epipelagicheskie ryby delyatsya na melkih kormovyh i krupnyh hishnikov kotorye ohotyatsya na nih Kormovye ryby obrazuyut kosyaki i angl plankton U bolshinstva vidov telo vytyanutoe i obtekaemoe chto pozvolyaet razvivat vysokuyu skorost i sovershat dlitelnye migracii V celom kormovye ryby i hishniki imeyut shozhee morfologicheskoe stroenie U hishnikov kak pravilo veretenoobraznoe gladkoe telo serpovidnyj hvost i bolshoj rot Dorsalnaya poverhnost tela epipelagicheskih ryb obychno okrashena v chyornyj sinij ili zelyonyj cvet a boka i bryushko serebristye Tyomnaya spina delaet rybu malozametnoj na fone dna Serebristye svetlye boka i bryushko ploho vidny snizu na fone zerkalnoj poverhnosti vody Kil na bryuhe umenshaet ten obrazuyushuyusya s bryushnoj storony kotoraya mozhet demaskirovat rybu Pri vzglyade na sboku svet padayushij na tyomnuyu spinku i ten nizhnej chasti ryby skradyvaemaya bleskom cheshui delaet rybu nezametnoj Svet vsegda padaet v vodu sverhu osveshaya luchshe vsego spinku ryby bryushko ostayotsya v teni Osveshyonnaya tyomnaya spinka kazhetsya svetlee chem est serye bokah neizmenny a bryushko vyglyadit temnee Pri vzglyade sboku ryba kazhetsya serovatoj i slivaetsya s tolshej vody Krome togo odnotonnaya okraska bez tenej lishaet predmet relefnosti ryba kazhetsya ploskoj eyo ochertaniya teryayut chyotkost Kozha epipelagicheskih ryb kak pravilo pokryta blestyashej cheshuyoj kazhdaya cheshujka sluzhit svoeobraznym zerkalom Svet otrazhaetsya ot vertikalno orientirovannoj cheshui delaya rybu na srednej glubine pochti nevidimoj pri vzglyade sboku Drejfushie sargassovye vodorosli obrazuyut v okeane polosy protyazhyonnostyu neskolko kilometrovSargassovyj morskoj kloun prekrasno maskiruetsya na fone vodoroslej Nesmotrya na ogranichennoe kolichestvo vidov epipelagicheskie ryby ochen mnogochislenny Otsutstvie raznoobraziya vospolnyaetsya chislom Kormovye ryby obrazuyut ogromnye kosyaki a ohotyashiesya na nih hishnye ryby yavlyayutsya v svoyu ochered cennymi promyslovymi obektami Mnogie kormovye ryby yavlyayutsya fakultativnymi hishnikami kotorye pri sluchae podhvatyvayut iz vodyanoj tolshi rachkov ili lichinok i vozvrashayutsya k filtracii fitoplanktona kogda eto stanovitsya energeticheski bolee effektivno Filtraciya kak pravilo osushestvlyaetsya dlinnymi zhabernymi tychinkami Nekotorye krupnejshie epipelagicheskie ryby naprimer kitovaya i gigantskaya akula tak zhe kak i samye melkie shproty i anchousy yavlyayutsya filtratorami V sovershenno prozrachnyh okeanskih vodah malo korma Oblasti s ego povyshennym soderzhaniem kak pravilo mutnye ot cvetushego planktona K nim ustremlyayutsya zhivotnye filtratory kotorye v svoyu ochered privlekayut hishnikov Lov tunca optimalno provodit kogda mutnost vody ocenyonnaya s pomoshyu diska Sekki na maksimalnoj glubine v solnechnyj den sostavlyaet 15 35 m Plavuchie obekty Epipelagicheskih ryb privlekayut plavuchie obekty Oni sobirayutsya v mnogochislennye stai vokrug drejfuyushih oblomkov plotov meduz i vodoroslej obespechivayushih v opticheskoj pustote vizualnyj stimul Plavuchie obekty predostavlyayut angl nekotoruyu zashitu ot hishnikov U nekotoryh vidov prisutstvie bolshogo kolichestva drejfuyushih vodoroslej ili meduz sushestvenno uvelichivaet uroven vyzhivaemosti molodnyaka Plavuchie skopleniya sargassuma sluzhat melkim epipelagicheskim rybam ukrytiem i kormyat ih Nebolshie shariki zapolnennye uglekislym gazom pridayut vodoroslyam plavuchest Molod mnogih pribrezhnyh ryb ispolzuet morskie vodorosli kak ukrytie i istochnik pishi poskolku v nih pryachutsya bespozvonochnye i drugie melkie ryby Drejfuyushie vodorosli v osobennosti sargass obespechivayut sredu obitaniya s polnocennym ukrytiem i kormovoj bazoj i dazhe podderzhivayut sobstvennuyu unikalnuyu faunu naprimer sargassovogo morskogo klouna V hode issledovaniya u poberezhya Floridy v odnom skoplenii sargassovyh vodoroslej bylo obnaruzheno 54 vida zhivotnyh iz 23 semejstv Molod ryb ispolzuet v kachestve ukrytiya i istochnika pishi meduz nesmotrya na to chto poslednie ohotyatsya na melkih ryb Chtoby ne gonyatsya po vsemu okeanu za podvizhnymi stayami pelagicheskih ryb naprimer tuncov ispolzuyut specialnye angl Oni predstavlyayut soboj zayakorennye ploty ili drugie predmety plavayushie na ili u poverhnosti vody V Tihom i Indijskom okeanah rybaki ustanavlivayut plavuchie manki iz raznogo musora vokrug tropicheskih ostrovov i koshelkovymi nevodami lovyat privlechyonnuyu imi rybu Bolshaya barrakuda v soprovozhdenii svity melkih ryb Issledovaniya provedyonnye s pomoshyu eholota vo Francuzskoj Polinezii obnaruzhili vokrug takih ustrojstv krupnye stai zheltopyoryh i bolsheglazyh tuncov sobravshiesya na rasstoyanii ot 10 do 50 m Na bolshem udalenii ot 50 do 150 m nablyudalis skopleniya zheltopyoryh tuncov i dlinnopyoryh tuncov menshej plotnosti Eshyo dalshe na rasstoyanii svyshe 500 m byli razbrosannye gruppy krupnyh vzroslyh tuncov raznyh vidov Eti gruppy otlichalis po raspredeleniyu i plotnosti i v nekotoryh mestah perekryvali drug druga Ustrojstva privlekali i drugie vidy ryb S nastuplenie temnoty gruppy rasseyalis Krupnyh pelagicheskih ryb dazhe hishnyh chasto soprovozhdaet svita iz melkih rybyoshek Fridajvery kotorye dolgoe vremya ostayutsya pod vodoj takzhe mogut privlech k sebe podobnuyu svitu pri etom meloch budet sledovat po pyatam a krupnye ryby nablyudat na rasstoyanii Morskie cherepahi kotorye sluzhat estestvennym ukrytiem melkim rybkam inogda stanovyatsya nevolnoj mishenyu ataki marlinov privlechyonnyh ih svitoj Pribrezhnye ryby Staya angl tipichnyh predstavitelej neriticheskih ryb Ryb obitayushih v pribrezhnoj zone nad kontinentalnym shelfom takzhe nazyvayut neriticheskimi Poskolku glubina kontinentalnogo shelfa obychno ne prevyshaet 200 m pribrezhnye ryby kotorye ne yavlyayutsya pridonnymi kak pravilo obitayut v zalitoj solncem epipelagiali Neriticheskie epipelagicheskie ryby odni iz samyh rasprostranyonnyh ryb vo vsyom mire Sredi nih est kak kormovye tak i hishnye Kormovye ryby procvetayut v pribrezhnyh zonah bogatyh pitatelnymi veshestvami za schyot apvellinga i ploskostnogo stoka Nekotorye vidy yavlyayutsya prohodnymi ili poluprohodnymi Okeanicheskie ryby obitayut v okeanicheskoj zone kotoraya raspolozhena za kontinentalnym shelfomOkeanicheskie rybyOkeanicheskie ryby zhivut v vodah otkrytogo morya za kontinentalnym shelfom Oni mogut silno otlichatsya ot neriticheskih vidov Tem ne menee eti dva tipa ne yavlyayutsya vzaimoisklyuchayushimi poskolku mezhdu pribrezhnoj i okeanicheskoj oblastyami net chyotkoj granicy i mnogie epipelagicheskie ryby perehodyat iz odnoj oblasti v druguyu osobenno na razlichnyh etapah zhiznennogo cikla Okeanicheskie epipelagicheskie ryby byvayut postoyannymi obitatelyami chastichnymi obitatelyami i sluchajnymi posetitelyami Postoyannye obitateli vsyu zhizn provodyat v otkrytom more K nim otnosyatsya lish neskolko vidov naprimer tuncy letuchie ryby marliny makreleshuki sajra locmany remory okeanicheskie akuly i obyknovennaya luna ryba Bolshinstvo iz etih vidov borozdit otkrytoj okean izredka poyavlyayas na kontinentalnom shelfe Peremesheniya nekotoryh postoyannyh obitatelej svyazany s drejfom meduz ili morskih vodoroslej Chastichnye obitateli delyatsya na 3 gruppy vidy u kotoryh v etoj zone zhivyot tolko molod vidy obitayushie v otkrytom more lish vo vzroslom sostoyanii lososi letuchie ryby kitovye akuly i glubokovodnye vidy sovershayushie sutochnye vertikalnye migracii kotorye nochyu podnimayutsya k poverhnosti vody naprimer miktofovye Sluchajnymi posetitelyami okeanicheskoj epipelagiali byvayut kak vzroslye osobi tak i molodnyak vidov postoyanno zhivushih v drugih zonah i sluchajno zanosimyh syuda techeniem Obyknovennaya luna ryba postoyannyj obitatel okeanicheskoj epipelagicheskoj zony inogda drejfuet s techeniem poedaya meduz Kitovaya akula eshyo odin obitatel okeanicheskoj epipelagiali cedit plankton i periodicheski opuskaetsya v mezopelagicheskuyu zonu Svetyashijsya anchous yavlyaetsya chastichnym obitatelem okeanicheskoj epipelagicheskoj zony Dnyom eti ryby derzhatsya na glubine a nochyu v poiskah pishi podnimayutsya k poverhnosti vodyGlubokovodnye rybyOsnovnaya statya Glubokovodnye ryby Namnogo nizhe epipelagiali obitayut razlichnye tipy pelagicheskih ryb prisposoblennye k zhizni v etih bolee glubokih zonah V glubinah okeana idyot nepreryvnyj angl samoproizvolnoe osazhdenie detrita iz verhnih sloyov vodnoj tolshi On yavlyaetsya proizvodnym zhiznedeyatelnosti organizmov produktivnoj evfoticheskoj zony Morskoj sneg vklyuchaet myortvyj ili umirayushij plankton prostejshih diatomovye vodorosli fekalii pesok sazhu i prochuyu neorganicheskuyu pyl Po puti snezhinki rastut i za neskolkih nedel poka ne opustyatsya na dno okeana mogut dostigat neskolkih santimetrov v diametre Tem ne menee bolshinstvo organicheskih komponentov morskogo snega potreblyayutsya mikrobami zooplanktonom i drugimi zhivotnymi filtratorami na protyazhenii pervyh 1000 metrov ih puteshestviya to est v epipelagiali Takim obrazom morskoj sneg mozhno schitat osnovoj glubokovodnoj mezopelagicheskoj i donnoj ekosistem poskolku solnechnyj svet ne mozhet proniknut skvoz tolshu vody glubokovodnye organizmy v kachestve istochnika energii polagayutsya na morskoj sneg Nekotorye gruppy glubokovodnyh ryb takie kak predstaviteli semejstv miktofovyh angl toporikovyh fotihtievyh inogda nazyvayut psevdookeanicheskimi poskolku oni koncentriruyutsya vokrug strukturnyh oazisov v chastnosti u podvodnyh vershin i na materikovom sklone Podobnoe yavlenie obyasnyaetsya prisutstviem kormovoj bazy kotoruyu v svoyu ochered privlekayut podobnye oazisy Ryby razlichnyh pelagicheskih i glubokovodnyh donnyh zon zametno otlichayutsya drug ot druga po povedeniyu i stroeniyu Gruppy sosushestvuyushih vidov v predelah kazhdoj zony funkcioniruyut analogichnym obrazom naprimer nebolshie mezopelagicheskie filtratory sovershayushie vertikalnye migracii batipelagicheskie udilshiki i glubokovodnye donnye dolgohvostovye Sredi vidov obitayushih na glubine redko vstrechayutsya Veroyatno glubokovodnye ryby dostatochno drevnie i nastolko horosho prisposobleny k okruzhayushej srede chto poyavlenie sovremennyh ryb ne uvenchalos uspehom Neskolko glubokovodnyh predstavitelej kolyuchepyoryh prinadlezhat k drevnim otryadam beriksoobraznyh i opahoobraznyh Bolshinstvo pelagicheskih ryb vstrechayushihsya na glubine prinadlezhat k sobstvennym otryadam chto predpolagaet dlitelnuyu evolyuciyu v podobnyh usloviyah I naprotiv glubokovodnye donnye vidy prinadlezhat k otryadam kotorye vklyuchayut mnogih ryb obitayushih na melkovode Vidy po zonam pelagialiMnogie vidy sovershayut sutochnye vertikalnye migracii mezhdu zonami V etoj tablice oni perechisleny po srednej ili bolee glubokoj zone osnovnogo prebyvaniyaZona Vidy i gruppy vidov Epipelagicheskaya lamnoobraznye serye akuly i kitovye akuly seldeobraznye seldi i anchousy lososyovye losos aterinoobraznye letuchie ryby poluryly makreleshuki okuneobraznye stavridy korifeny morskie leshi barrakudy tuncy marliny Mezopelagcheskaya svetyashiesya anchousy opahi alepizavry opistoproktovye angl melamfaevye sablezubyeBatipelagicheskaya V osnovnom gonostomovye i udilshiki A takzhe dlinnorogie sablezuby hauliody zhivogloty giganturovye angl angl angl angl ciemovye lofotovye meshkorotoobraznye kitovidkovye toporikovyeBentopelagicheskaya Osobenno mnogochislenny dolgohvostovye i bititovyeBenticheskaya Kambaly zelenoglazkovye beldyugi ugri skaty pinagory i lopatochnye netopyriSravnitelnoe stroenie pelagicheskih rybParametr Mezopelagicheskie vidy Batipelagicheskie vidy Glubokovodnye i benticheskie vidymuskuly telo muskulistoe ploho razvity telo dryabloeskelet krepkij slabo okostenevshijcheshuya da netnervnaya sistema horosho razvita tolko bokovaya liniya i obonyanieglaza krupnye i chuvstvitelnye malenkie inogda ne funkcionalnye razlichnye ot horosho razvityh do atrofirovannyh fotofory chasto imeyutsya chasto imeyutsya obychno netzhabry horosho razvitypochki krupnye malenkieserdce krupnoe malenkoeplavatelnyj puzyr imeetsya u ryb sovershayushih vertikalnye migracii reducirovan ili otsutstvuet razlichnyj ot horosho razvitogo do polnogo otsutstviya razmer obychno menee 25 sm razlichnyj vidy dlinoj 1 m vstrechayutsya redkoMezopelagicheskie rybyBolshinstvo mezopelagicheskih ryb yavlyayutsya melkimi filtratorami kotorye nochyu podnimayutsya chtoby kormitsya v bogatoj pishej epipelagicheskoj zone Na rassvete oni vozvrashayutsya v tyomnye holodnye i bednye kislorodom vody mezopelagiali gde dovolno bezopasno Svetyashiesya anchousy sostavlyayut do 65 biomassy glubokovodnyh ryb Imenno oni v osnovnom formiruyut zvukorasseivayushij sloj Pod epipelagicheskoj zonoj usloviya okruzhayushej sredy rezko menyayutsya Na glubine mezhdu 200 i 1000 m osveshyonnost oslabevaet do teh por poka ne nastupaet polnaya temnota Cherez termoklin temperatura padaet do 4 8 C Eto sumerechnaya ili angl Davlenie prodolzhaet narastat na 1 atmosferu kazhdye 10 m togda kak koncentraciya pishi soderzhanie kisloroda i skorost cirkulyacii vody snizhayutsya Radisty ispolzuyushie razrabotannye vo vremya Vtoroj Mirovoj vojny sonary byli ozadacheny obnaruzhiv dnyom na glubine 300 500 metrov lozhnoe morskoe dno Nochyu podobnoe yavlenie nablyudalos na menshej glubine Okazalos chto ono svyazano s prisutstviem millionov morskih organizmov v osobennosti melkih mezopelagicheskih ryb obladayushih plavatelnym puzyryom kotorye otrazhali signal gidrolokatora V sumerkah ryby podnimalis k poverhnosti chtoby kormitsya planktonom Etot fenomen izvesten kak zvukorasseivayushij sloj Sloj opuskaetsya kogda na nebe siyaet luna i podnimaetsya esli ona zakryta oblakami Bolshinstvo mezopelagicheskih ryb sovershayut sutochnye vertikalnye migracii podnimayas nochyu v epipelagicheskuyu zonu zachastuyu vsled za peremesheniem planktona i vozvrashayas dnyom na bezopasnuyu glubinu Podobnye vertikalnye migracii chasto imeyut bolshuyu protyazhyonnost oni osushestvlyaetsya s pomoshyu plavatelnogo puzyrya Kogda ryba hochet vsplyt puzyr naduvaetsya Uchityvaya vysokoe davlenie v mezopelagicheskoj zone eto trebuet znachitelnoj energii Pri podyome davlenie v plavatelnom puzyre dolzhno regulirovatsya chtoby ego ne razorvalo Esli ryba sobiraetsya vernutsya na glubinu puzyr sduvaetsya V hode migracij nekotorye mezopelagicheskie ryby prohodyat cherez termoklin gde temperatura menyaetsya s 10 do 20 C chto govorit ob ih terpimosti k bystrym temperaturnym izmeneniyam Ostalnaya chast mezopelagicheskih ryb hishniki ohotyashiesya iz zasady podobno sablezubym Svoimi teleskopicheskimi napravlennymi vverh glazami sablezuby razlichayut na fone tmy siluet zhertvy Ih otognutye nazad zuby ne dayut dobyche vyrvatsya iz pasti U etih ryb muskulistoe telo pokrytoe cheshuyoj krepkij skelet horosho razvitye zhabry i centralnaya nervnaya sistema krupnye serdce i pochki U mezopelagicheskih filtratorov malenkij rot i tonkie zhabernye tychinki togda kak u ihtiofagov rot krupnyj a tychinki grubee U ryb sovershayushih vertikalnye migracii imeetsya plavatelnyj puzyr Mezopelagicheskie ryby prisposobleny k aktivnomu obrazu zhizni v usloviyah nizkoj osveshyonnosti Bolshinstvo iz nih hishniki s krupnymi glazami U nekotoryh glubokovodnyh vidov trubchatye glaza s bolshimi linzami kotorye glyadyat vverh a iz fotoreceptorov prisutstvuyut lish palochki Eto obespechivaet binokulyarnoe zrenie i vysokuyu chuvstvitelnost k slabym svetovym signalam Takaya adaptaciya obespechivaet povyshennoe konechnoe videnie za schyot bokovogo videniya i pozvolyaet hishnikam vysmotret kalmarov karakatic i melkuyu rybu siluet kotoryh vyrisovyvaetsya nad nimi na fone temnoty Obychno mezopelagicheskie ryby lisheny zashitnyh shipov ih zashitoj sluzhit kamuflyazh Hishniki okrasheny v tyomnye cveta chyornyj ili krasnyj Na glubine dlinnovolnovyj krasnyj cvet nevidim i krasnaya okraska stol zhe effektivna kak i chyornaya Ryby sovershayushie vertikalnye migracii okrasheny kontrastno v serebristyh tonah s tyomnoj spinkoj i svetlym bryushkom Na ventralnoj poverhnosti tela u nih zachastuyu imeyutsya fotofory ispuskayushie svet maskiruyushij siluet ryby pri vzglyade snizu Odnako glaza nekotoryh hishnikov osnasheny zhyoltymi linzami filtruyushie rasseyannyj svet kotorye delayut vidimym biolyuminescentnoe svechenie U antarkticheskogo klykacha krupnye obrashyonnye vverh glaza sposobnye razlichit siluet zhertvy U opistoproktovyh glaza imeyut formu bochonka kotorye obychno napravleny vverh no mogut nacelitsya vperyod U malakostov dlina nizhnej chelyusti ravna 1 4 dliny tela Ona lishena dna i krepitsya posredstvom sharnira i vidoizmenyonnoj podyazychnoj kosti Pozadi krupnyh perednih klykov raspolozheny melkie zazubrennye zuby Malakosty odni iz nemnogih ryb sposobnyh ispuskat krasnyj svet Poskolku bolshinstvo zhertv ego ne razlichaet hishnik ohotitsya s pomoshyu nevidimogo lucha angl prinadlezhashij semejstvu opistoproktovyh yavlyaetsya edinstvennym izvestnym vidom sredi pozvonochnyh kotoryj fokusiruet izobrazhenie s pomoshyu zerkala a ne linzy Issledovaniya poluchennye s pomoshyu uchyotnogo traleniya pokazali chto svetyashiesya anchousy formiruyut do 65 biomassy vseh glubokovodnyh ryb Dejstvitelno miktofovye yavlyayutsya odnimi iz naibolee rasprostranyonnyh po chislennosti i raznoobraznyh sredi vseh pozvonochnyh oni igrayut vazhnuyu ekologicheskuyu rol v kachestve pishi dlya krupnyh zhivotnyh Globalnaya biomassa miktofovyh ocenivaetsya v 660 mln tonn Imenno svetyashiesya anchousy sostavlyayut bolshuyu chast biomassy obrazuyushuyu glubinnyj rasseivayushij sloj mirovogo okeana Signal sonara otrazhaetsya ot millionov plavatelnyh puzyrej etih ryb sozdavaya effekt lozhnogo dna Bolsheglazye tuncy sovershayut vertikalnye migracii perehodya iz epipelagicheskoj v mezopelagicheskuyu zonu Dnyom oni opuskayutsya na glubinu do 500 m veroyatno sleduya za kormovymi rybami Alepizavry ohotyatsya iz zasady Eto postoyannye obitateli mezopelagicheskoj zony Odin iz samyh krupnyh mezopelagicheskih vidov ryb dostigayushij v dlinu 2 m U predstavitelej semejstva giganturovyh krupnye napravlennye vperyod glaza s bolshimi linzami angl ukusom obezdvizhivayut prochih mezopelagicheskih ryb Bolsheglazye tuncy nochyu borozdyat vody epipelagiali a den provodyat v mezopelagicheskoj zone Batipelagicheskie rybyMelanocet Dzhonsona eto hishnik ozhidayushij v zasade kotoryj privlekaet dobychu s pomoshyu biolyuminescentnoj primanki Shiroko raskryv past pod naporom vody on sposoben proglotit pishu prevyshayushuyu sobstvennyj razmer sootvetstvuet otkrytoj chasti okeana nad materikovym sklonom Ona raspolozhena na glubine ot 200 500 do 3000 4000 m Eto promezhutochnaya glubinnaya zona mezhdu poverhnostnymi zonami i Ona prinadlezhit k afoticheskoj zone kotoruyu inogda nazyvayut nochnoj Dlya neyo harakterno polnoe otsutstvie solnechnogo sveta ogromnoe davlenie nizkaya temperatura i malaya koncentraciya rastvoryonnogo v vode kisloroda U batipelagicheskih ryb imeyutsya specialnye adaptacii pozvolyayushie im vyzhit v takih usloviyami u nih zamedlennyj metabolizm i nespecializirovannaya dieta Oni predpochitayut sidet i zhdat pishu a ne tratit energiyu na eyo poiski Povedenie ryb batipelagiali mozhno protivopostavit povedeniyu mezopelagicheskih ryb Poslednie zachastuyu ochen podvizhny v to vremya kak mnogie batipelagicheskie vidy eto hishniki ozhidayushie v zasade kak pravilo rashoduyushie malo energii na dvizhenie Sredi batipelagicheskih ryb preobladayut nebolshie udilshik gonostomovye Takzhe rasprostraneny dlinnorogie sablezuby ryby gadyuki kinzhalozuby i veretennikovye Eto melkie vidy dlinoj okolo 10 sm i lish nemnogie dostigayut bolee 25 sm Bolshuyu chast vremeni oni pochti nepodvizhno ozhidayut v tolshe vody poyavleniya dobychi privlekaemoj svetom ih fotofor Ta nemnogaya energiya popadayushaya v batipelagicheskuyu zonu pronikaet sverhu v vide detrita fekalij i izredka bespozvonochnyh i mezopelagicheskih ryb Okolo 20 pishi proizvedyonnoj v epipelagiali dostigaet mezopelagicheskoj zony togda kak v batipelagiali osedaet lish 5 Mnogie gonostomovye yavlyayutsya batipelagicheskimi hishnikami podzhidayushimi dobychu i sposobny proglotit zhertvu krupnee samih sebya Batipelagicheskie ryby vedut malopodvizhnyj obraz zhizni oni prisposobleny k minimalnomu rashodu energii v estestvennoj srede s ochen skudnoj pishej i dostupnoj energii gde dazhe net solnechnogo sveta a est lish biolyuminescenciya U nih vytyanutye tela dryablymi vodyanistymi myshcami i slabyj skelet Poskolku oni v osnovnom sostoyat iz vody ogromnoe davlenie na etih glubinah ne okazyvaet na nih silnogo vozdejstviya U mnogih vidov sharnirnye chelyusti sposobnye silno raspahivatsya osnasheny zagnutymi zubami Kozha pokryta slizyu i lishena cheshui Centralnaya nervnaya sistema ogranichena bokovoj liniej i obonyatelnymi strukturami glaza malenkie zachastuyu nefunkcionalnye zhabry pochki i serdce malenkie plavatelnyj puzyr kak pravilo otsutstvuet Molod kitodidkovyh okrashena v krasnyj cvet Eti ryby nochyu sovershayut vertikalnye migracii podnimayas v nizhnyuyu chast mezopelagicheskoj zony gde oni kormyatsya veslonogimi rachkami U vzroslyh samcov razvivaetsya obyomnaya pechen a chelyusti nagluho srastayutsya Oni prekrashayut kormitsya no prodolzhayut sushestvovat za schyot pitatelnyh veshestv nakoplennyh v pecheni Te zhe samye adaptacii harakterny i dlya lichinok ryb batipelagiali Eto dayot osnovanie predpolozhit podobnye funkcii byli priobreteny v processe evolyucii cherez neoteniyu Dazhe na stadii lichinki ryby sposobny zavisat v tolshe vody zatrachivaya minimum energii Nesmotrya na svirepuyu vneshnost eti kak pravilo miniatyurnye ryby so slabymi myshcami ne predstavlyayut ugrozu dlya cheloveka U glubokovodnyh ryb plavatelnyj puzyr libo sovershenno otsutstvuyut libo ele funkcioniruet i batipelagicheskie ryby obychno ne sovershayut vertikalnyh migracij Zapolnenie puzyrya pri takom bolshom davlenii sopryazheno s ogromnymi energozatratami U nekotoryh glubokovodnyh ryb plavatelnyj puzyr funkcioniruet na rannej stadii zhiznennogo cikla poka oni obitayut v verhnej epipelagicheskoj zone no s vozrastom usyhaet ili zapolnyaetsya zhirom kogda ryba peremeshaetsya v sredu obitaniya harakternuyu dlya vzroslyh osobej Naibolee vazhnymi sensornymi sistemami kak pravilo yavlyayutsya vnutrennee uho vosprinimayushee zvuki i bokovaya liniya kotoraya reagiruet na peremenu davleniya vody Obonyatelnaya sistema takzhe mozhet igrat sushestvennuyu rol dlya samcov kotorye nahodyat samok po zapahu Batipelagicheskie ryby okrasheny v chyornyj rezhe v krasnyj cvet S pomoshyu fotofory oni kak pravilo primanivayut dobychu ili privlekayut seksualnogo partnyora Poskolku edy ochen malo batipelagicheskie hishniki ne otlichayutsya razborchivostyu oni hvatayut vsyo chto proplyvaet dostatochno blizko Bolshoj rot s ostrymi zubami sluzhit dlya zahvata krupnoj dobychi a perekryvayushiesya zhabernye tychinki ne dayut uskolznut melochi V etoj zone trudno najti partnyora dlya razmnozheniya Nekotorye vidy zavisyat ot biolyuminescencii Drugie yavlyayutsya germafroditami Samki udilshikov vyrabatyvayut feromony chtoby privlech kroshechnyh samcov Najdya samku samec kusaet eyo i bolee nikogda ne otpuskaet Samec angl posle ukusa vypuskaet ferment kotoryj rassheplyaet kozhu ego rta i eyo tela para srastaetsya tak chto krovenosnaya sistema u nih stanovitsya edinoj Zatem samec atrofiruetsya stanovyas ne bolee chem paroj polovyh zhelez Takoj ekstremalnyj polovoj dimorfizm garantiruet chto kogda samka gotova k nerestu u neyo v dostupnosti budet istochnik spermy Pomimo ryb v batipelagicheskoj zone obitayut kalmary osminogi gubki brahiopody morskie zvyozdy i morskie ezhi Syuda opuskayutsya krupnye kity Meshkorotoobraznye shiroko raspahivayut past i lovyat eyu kak nevodom dobychu kotoruyu privlekayut lyuminescentnym organom na konchike hvosta Chyornyj zhivoglot so svoim rastyagivayushimsya zheludkom sposoben proglotit celikom dobychu kotoraya vesit bolshe nego v 10 raz Samec gaplofriny nezhnoj prirastaet k samke i atrofiruetsya do pary gonad stanovyas po mere neobhodimosti istochnikom spermy U shirokorasprostranyonnyh sablezubov samye krupnye sredi ryb zuby otnositelno tela Nesmotrya na ustrashayushuyu vneshnost batipelagicheskie ryby obychno slishkom maly i slaby chtoby predstavlyat opasnost dlya cheloveka angl nochyu mozhet sovershat vertikalnye migracii podnimayas s batipelagicheskih glubin pochti na poverhnost vody Demersalnye rybyMaloglazyj makrurus donnaya ryba s udlinyonnym telom krupnymi glazami i horosho razvitoj bokovoj liniej Demersalnye ryby bolshuyu chast zhiznennogo cikla provodyat na dne ili v neposredstvennoj blizosti ot dna pridonnye ryby Oni vstrechayutsya kak v pribrezhnyh rajonah kontinentalnogo shelfa tak i v otkrytom okeane vdol angl kontinentalnogo sklona V celom oni otsutstvuyut v abissopelagicheskoj i ultraabissalnoj zone i na abissalnoj ravnine Oni zanimayut morskoe dno pokrytoe ilom peskom graviem ili valunami V glubokovodnoj zone donnye ryby dovolno mnogochislenny i aktivny po sravneniyu s batipelagicheskimi rybami Zdes rasprostraneny dolgohvostovye bititovye beldyugi lopatochnye netopyri i pinagory U donnyh ryb horosho razvitye organy i muskulatura Po etim parametram oni blizhe k mezopelagicheskim rybam chem k obitatelyam batipelagiali Inymi slovami oni bolee raznoobrazny U nih kak pravilo otsutstvuyut fotofory Glaza i plavatelnyj puzyr mogut byt kak horosho razvitymi tak i atrofirovannymi Oni silno otlichayutsya po razmeru neredko vstrechayutsya krupnye ekzemplyary svyshe 1 m dlinoj U mnogih demersalnyh ryb dlinnoe i uzkoe telo podobnoe ugryam Vozmozhno eto svyazano s dlinoj bokovoj linii kotoraya ulavlivaet nizkochastotnye zvukovye volny togda kak nekotorye ryby s pomoshyu muskulov izdayut podobnye zvuki privlekaya seksualnyh partnyorov Obonyanie takzhe igraet vazhnuyu rol sudya po tomu kak bystro oni lovyatsya na zhivca Osnovu raciona demersalnyh ryb sostavlyayut bentosnye bespozvonochnye i padal Oni nahodyat pishu v osnovnom posredstvom bokovoj linii obonyaniya i osyazaniya Demersalnyh ryb mozhno razdelit na sugubo benticheskih i bentopelagicheskih imeyushih otricatelnuyu i nejtralnuyu plavuchest sootvetstvenno Benticheskie ryby postoyanno kontaktiruyut s dnom Oni libo lezhat v zasade v ozhidanii dobychi libo aktivno dvigayutsya v poiskah pishi Bentopelagicheskie ryby Atlanticheskij bolshegolov Bentopelagicheskie ili pridonnye ryby obitayut v neposredstvennoj blizosti u dna pitayutsya bentosom i bentopelagicheskim zooplanktonom Bolshinstvo demersalnyh ryb otnosyatsya k bentopelagicheskim Ih mozhno razdelit na vidy s krepkim telom i dryablotelyh Dryablotelye bentopelagicheskie vidy shozhi s batipelagicheskimi u nih nebolshaya massa tela i nizkij uroven metabolizma Oni zatrachivayut minimum energii i ohotyatsya iz zasady Primerom takogo tipa sluzhit angl hishnik s krupnoj golovoj i telom kotoroe na 90 sostoit iz vody U etih ryb samye krupnye glaza i samyj malenkij mozg otnositelno tela sredi pozvonochnyh Patagonskij klykach Tvyordotelye bentopelagicheskie ryby aktivnye plovcy kotorye energichno ishut dobychu na dne Inogda oni zhivut vokrug podvodnyh vershin s silnym techeniem Primerom takogo tipa yavlyayutsya patagonskij klykach i atlanticheskij bolshegolov Ranee eti ryby vodilis v izobilii i yavlyalis cennym obektom promysla ih dobyvali radi vkusnogo plotnogo myasa Benticheskie ryby Hotya benticheskie ryby i ne otnosyatsya k pelagicheskim my rasskazhem o nih vkratce dlya polnoty i sravneniya Nekotorye rybe ne podhodyat pod predstavlennuyu vyshe klassifikaciyu Naprimer shiroko rasprostranyonnye i pochti slepye predstaviteli semejstva angl racion kotoryh sostoit iz bentopelagicheskogo zooplanktona Tem ne menee oni otnosyatsya k benticheskim rybam poskolku nahodyatsya v postoyannom kontakte s dnom Oni stoyat na dne opirayas na dlinnye luchi svoi plavnikov golovoj k techeniyu i lovyat proplyvayushuyu mimo pishu Samyj glubokovodnyj iz izvestnyh nyne vidov Abyssobrotula galatheae vneshne pohozhie na ugrej i sovershenno slepye donnye ryby kotorye pitayutsya bespozvonochnymi angl stoyat na dne opirayas na dlinnye luchi svoih plavnikov Skat Taeniura meyeni ohotyatsya na donnyh ryb dvustvorchatyh mollyuskov krabov i krevetokSechenie okeanskogo bassejna Obratite vnimanie na znachitelnoe Na bolshih glubinah deficit pishi i chrezvychajno vysokoe davlenie ogranichivaet vyzhivaemost ryb Samaya glubokaya tochka okeana nahoditsya na glubine okolo 11 000 metrov Batipelagicheskie ryby obychno ne vstrechayutsya nizhe 3000 metrov Naibolshaya glubina obitaniya donnyh ryb sostavlyaet 8 370 m Vozmozhno ekstremalnoe davlenie podavlyaet vazhnejshie funkcii fermentov Benticheskie ryby chashe popadayutsya i bolee raznoobrazny na kontinentalnom sklone gde variruetsya sreda obitaniya i bolshe korma Okolo 40 dna okeana sostoit iz abissalnyh ravnin no eti ploskie pustynnye regiony pokryty morskimi otlozheniyami i obychno pridonnaya zhizn bentos zdes otsutstvuet Glubokovodnye donnye ryby bolee rasprostraneny v kanonah ili na skalah posredi ravnin gde koncentriruyutsya soobshestva bespozvonochnyh organizmov Podvodnye gory omyvayutsya glubokovodnymi techeniyami eto stanovitsya prichinoj vozniknoveniya apvellinga kotoryj podderzhivaet zhizn donnyh ryb Gornye hrebty mogut delit podvodnye regiony na razlichnye ekosistemy Pelagicheskij rybnyj promyselKormovye ryby Izmenenie obyomov ulova atlanticheskoj seldi Krupnye pelagicheskie hishniki obychno ohotyatsya na melkih ryb pelagiali Kormovye ryby kormyatsya filtruya plankton i kak pravilo ne prevyshayut 10 santimetrov v dlinu Oni chasto obrazuyut kosyaki i migriruyut na bolshie rasstoyaniya mezhdu nerestilishami i mestami nagula Oni osobenno chasto vstrechayutsya v apvellingovyh rajonah severnoj chasti Atlanticheskogo okeana u beregov Yaponii i u zapadnogo poberezhya Afriki i Ameriki U nih kak pravilo korotkij srok zhizni i ih angl zametno koleblyutsya v techenie goda Atlanticheskaya seld vstrechaetsya v Severnom more i Severnoj Atlantike na glubinah do 200 metrov Vazhnyj seldevyj promysel sushestvoval v etih mestah na protyazhenii vekov V proshlom v Norvegii osnovnaya chast zimnego ulova zhirnoj i molodoj seldi prihodilas na vesennij nerest Masshtabnaya tehnicheskaya modernizaciya rybnogo promysla v 60 e gody privela k perelovu silnomu istosheniyu pogolovya etogo vida v nachale 70 h godov Bylo vvedeno regulirovanie i pogolove udalos vosstanovit Shirokomasshtabnyj promysel severnoj putassu nachalsya v 1980 h godah k momentu istosheniya zapasov mnogih tradicionnyh promyslovyh ryb Sejchas obyom vylova sostavlyaet do 2 mln tonn rossijskaya kvota sostavlyaet 60 tys t Putassu lovyat pelagicheskim tralom i koshelkovym nevodom Vazhnejshim promyslovym vidom yavlyaetsya sardina evropejskaya Eti stajnye ryby epipelagiali obitayut na glubine 25 50 m Uroven zapasov sardin dostatochno velik a promysel ne nanosit seryoznogo vreda ekosistemam Ih lovyat zhabernymi setyami koshelkovymi nevodami tralami V 1980 e gody vyolsya massovyj promysel do 5 mln t ezhegodno tihookeanskoj sardiny ivasi no sejchas ulovy sushestvenno snizilis okolo 200 tys t Izmeneniya chislennosti populyacii etih ryb obuslovleny klimaticheskimi faktorami Kosyak peruanskih sardin Seldi kormyatsya rachkami Mojva pelagicheskaya kormovaya ryba AnchousHishnye ryby Sm takzhe Tuncy K pelagicheskim rybam srednego razmera otnosyatsya letuchie ryby stavridy barrakudy korifeny i pribrezhnye vidy skumbrievyh Mnogie iz nih pitayutsya kormovymi rybami i v svoyu ochered sluzhat kormovoj bazoj dlya krupnyh pelagicheskih hishnikov Pochti vse ryby yavlyayutsya hishnikami poetomu za isklyucheniem vidov zanimayushih verhnee polozhenie v pishevoj cepi razdelenie na kormovyh i hishnyh ryb do nekotoroj stepeni iskusstvenno Mnogie krupnye pelagicheskie ryby yavlyayutsya kochevymi vidami kotorye sovershayut dlitelnye morskie migracii Oni pitayutsya melkimi i srednimi pelagicheskimi rybami Vremya ot vremeni oni sleduyut za dobychej sobravshejsya v kosyaki i mnogie sami obrazuyut stai V omyvayushih Evropu vodah sushestvuet tri populyacii skumbrii Odna populyaciya migriruet v Severnoe more drugaya ostayotsya v Irlandskom more a tretya uplyvaet na yug vdol zapadnogo poberezhya Shotlandii i Irlandii Skumbrii zhivut v tolshe vody blizko k poverhnosti oni postoyanno dvigayutsya peremeshayas mezhdu rajonami nagula i mestami neresta Ih promyshlyayut raznoglubinnymi pelagicheskimi tralami koshelkovymi nevodami i drifternymi setyami Primerami krupnyh pelagicheskih ryb yavlyayutsya tuncy marliny korolevskie makreli akuly i skaty Tuncy predstavlyayut cennyj obekt dlya kommercheskogo promysla Oni borozdyat okeany i najti ih neprosto Eti ryby sobirayutsya v mestah bogatyh kormom vdol granic techenij u podvodnyh vershin i v mestah apvellinga Ih lovyat koshelkovym nevodom pelagicheskimi tralami yarusami i drifternymi setyami Primenyayut angl Sejchas vylavlivaetsya okolo 5 mln tonn tunca iz nih 2 3 mln tonn v Tihom okeane ulovy postepenno snizhayutsya Morskie leshi Promysel zheltopyorogo tunca prishyol na smenu promysla chislennost kotorogo sushestvenno snizilas Mech ryba Korolevskaya makrelProduktivnost Glavnye poverhnostnye okeanicheskie techeniyaApvelling nablyudaetsya kak v pribrezhnoj zone tak i v otkryto okeane kogda blagodarya stolknoveniyu glubinnyh okeanicheskih techenij holodnye vody bogatye pitatelnymi veshestvami podnimayutsya na poverhnost Apvelling vyzyvaet cvetenie planktona kotoryj v svoyu ochered proizvodit zooplankton podderzhivayushij osnovnye mirovye rybnye resursy S prekrasheniem apvellinga rybolovstvo prihodit v upadok V 1960 h godah promysel peruanskogo anchousa byl krupnejshim v mire Chislennost anchousa silno snizilas vo vremya El Nino1972 goda kogda tyoplaya voda proshla nad holodnym techeniem Gumboldta kak chast 50 letnego cikla poniziv glubinu termoklina Apvelling ostanovilsya proizvodstvo fitoplanktona upalo vsled za etim snizilas chislennost populyacii anchousa i pogibli milliony ptic kotorym on sluzhil kormovoj bazoj V seredine 80 h godov apvelling vozobnovilsya i ulovy peruanskogo anchousa vernulis k prezhnemu urovnyu U beregov Yaponii stolknovenie holodnogo Kurilskogo techeniya i tyoplogo techeniya Kurosio vyzyvaet bogatyj pitatelnymi veshestvami apvelling Ciklicheskie izmeneniya etih techenij priveli k snizheniyu chislennosti populyacii peruanskoj sardiny Ulovy upali s 5 millionov tonn v 1988 godu do 280 tysyach tonn v 1998 godu V rezultate v region perestali prihodit na nagul tihookeanskie golubye tuncy Okeanicheskie techeniya mogut vliyat na raspredelenie rybnyh resursov kak koncentriruya tak i rasseivaya ih Smezhnye techeniya imeyut chyotkie granicy Inogda oni dazhe vidimy hotya v bolshinstve sluchaev ih legko opredelit po izmeneniyu solyonosti temperatury i mutnosti vody Naprimer v aziatskoj chasti severnoj Pacifiki dlinnopyorye tuncy vstrechayutsya mezhdu dvumya sistemami techenij Severnaya granica ih areala ocherchena holodnym Severo Tihookeanskim techeniem a yuzhnaya Severoekvatorialnym Na ih raspredelenie v ocherchennoj oblasti okazyvaet vliyanie techenie Kurosio podverzhennoe sezonnym kolebaniyam Ostrova i banki mogut vzaimodejstvovat s techeniyami i apvellingom sozdavaya oblasti s vysokoj produktivnostyu Bolshie zavihreniya sozdayut ot ostrovov nishodyashie ili podvetrennye techeniya v kotoryh koncentriruetsya plankton Banki i rify mogut stat prichinoj rezkogo podyoma glubokih techenij SkumbrievyeDaleko migriruyushie vidy rybEpipelagicheskie ryby v celom chasto peremeshayutsya na bolshie rasstoyaniya mezhdu mestami nagula i neresta ili v reagiruya na izmeneniya okruzhayushej sredy Krupnye okeanicheskie hishniki takie kak tuncy i lososi sposobny preodolet tysyachi kilometrov peresekaya okeany V 2001 godu bylo proizvedeno issledovanie migracij obyknovennogo tunca ot poberezhya Severnoj Karoliny s pomoshyu specialnyh vsplyvayushih mayachkov Posle prikrepleniya k telu mayachok otslezhival peremesheniya ryby v techenie goda posle chego otceplyalsya vsplyval na poverhnost vody i peredaval dannye na sputnik Issledovanie pokazalo chto sushestvuet 4 modeli migracij Odna gruppa tuncov celyj god derzhalas v ramkah zapadnoj Atlantiki Vtoraya bolshuyu chast vremeni takzhe provela v zapadnoj chasti Atlanticheskogo okeana no na nerest uplyla v Meksikanskij zaliv Tretya gruppa peresekla Atlantiku i vozvratilas obratno Tuncy prinadlezhashie k chetvyortoj gruppe takzhe pereplyli cherez Atlanticheskij okean i zashli na nerest v Sredizemnoe more Issledovanie pokazalo chto nesmotrya na raznye rajony neresta v severnoj Atlantike sushestvuet edinaya populyaciya obyknovennogo tunca a gruppy peremeshivayutsya mezhdu soboj Migriruyushie vidy oficialnyj termin prinyatyj v state 64 Konvencii OON po morskomu pravu Eto tuncy i blizkorodstvennye vidy dlinnopyoryj obyknovennyj bolsheglazyj polosatyj zheltopyoryj chernopyoryj tihookeanskij goluboj malye tuncy i makreletuncy morskie leshi marliny parusniki mech ryba karlikovaya sajra okeanicheskie akuly delfiny i drugie kitoobraznye Po sushestvu k migriruyushim vidam otnosyatsya vse krupnye pelagicheskie ryby za isklyucheniem ne predstavlyayushih kommercheskoj cennosti naprimer luny ryby Eti vidy zanimayut vysokoe polozhenie v troficheskoj cepi i sovershayut dlitelnye migracii k mestam neresta i nagula zachastuyu sleduya za kormovym vidami a takzhe imeyut obshirnoe geograficheskoe rasprostranenie Takim obrazom eti vidy vstrechayutsya kak vnutri isklyuchitelnoj ekonomicheskoj zony 370 km ot berega tak i v otkrytom more za eyo predelami Eto pelagicheskie vidy kotorye ne derzhatsya u dna hotya opredelyonnuyu chast zhiznennogo cikla oni mogut provodit v pribrezhnyh vodah PrimechaniyaLal Brij V Fortune Kate The Pacific Islands An Encyclopedia University of Hawaii Press 2000 P 8 ISBN 978 0 8248 2265 1 Obem mirovogo okeana Voda okeana neopr www 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