Kifi Arctic kwasfa, da mazaunan arewacin tekuna

Duk da bayyana mutuwarta, sanyi da kuma matsananci, da teku na Arewa Arctic Ocean, kamar yadda ya aikata da Arctic Ocean, suna gida su da yawa rayayyun kwayoyin halitta. Jere daga single-celled da plankton zuwa manyan dabbobi masu shayarwa.

iyakacin duniya cod

Ba kalla a cikin wannan sanyi baki bautarka Arctic cod kifi (Lat. Boreogadus Saida), kananan pelagic kifi cikin kwasfa iyali, wanda shi ma ake kira iyakacin duniya cod. Wannan irin kifi ba ya son dumi ruwa da kuma fi son low isasshen zazzabi: debe ko kusa 0 digiri Celsius.

Lokacin da yawan zafin jiki na cikin teku da kuma teku ruwa yakan zuwa +5, Arctic cod yawanci daina faruwa. A lokacin rani, wannan sanyi-m kifi fi son zama kusa da gefen kankara, mafi yawa a cikin Kara kuma Barents Sea.

Ina mamaki inda kifi zaune Arctic cod. Ta iyon da arewa na wani nau'in kifi a cikin 85 digiri arewa latitud. Irin wannan low yanayin zafi ne sauki da wani sashe, godiya ga gaban a cikin jiki, wato a cikin jijiyoyi da glycoprotein AFGP, wanda ya hana kifi daga misãlin.

Its sakamako ne cewa shi zahiri ƙunsa da kankara lu'ulu'u, ba da damar su girma, don haka da cewa kifi ba ya daskare, kuma ba ya zama wani yanki na kankara. Arctic cod son zuwa iyo ba kawai a ga ~ ar ruwan, amma kuma a cikin teku, mafi yawa a karkashin kankara floes da icebergs.

Fi son babba yadudduka na ruwa, kadan girgiza daga narke kankara floes. Saika babu zurfin-ruwa kifi, da kuma 500-900 mita kasa da teku surface ba saukar da. Kiyaye garkunan tumaki, da hijira, kamar mafi makaranta da kifi, a tsaye, sãfe da maraice, shi ya ta'allaka ne a kan kasa, da kuma rana da dare iyon fadin ruwa shafi.

bayyanar

Arctic cod kifi dubi quite unremarkable, elongated bakin ciki jiki, da launin ruwan kasa-m a saman da silvery kasa, da rawaya (da kuma wani lokacin m) ya dafa. Big kai da kuma babban bulging idanu, ƙananan muƙamuƙi tunkuɗa su gaba, wanda ya ba shi wani irin comic. Ta sauri iyon ta cikin jiki tsari, abin da hidima a matsayin ta taimako a maida daga ta regale masoya.

Arctic cod, kifi-tsira. Rayuwa Hasashen a ta 6-7 shekaru. Domin arewacin latitudes yana da yawa. A tsawon (shi ne mafi karami na iyali Gadidae) manya isa 27-30 cm, wasu mutane, ya kuma iya isa 40 cm, da kuma weighs kasa da 250 grams.

Abinci ga mazaunan arewacin

A Arctic cod ciyar a kan? A kifi fi son phytoplankton, zooplankton, kananan crustaceans, toya na sauran kifi. Saika - wani muhimmin mahada a cikin abinci sarkar na Arctic Ocean. Kamar yadda wata babbar mabukaci na Oceanic plankton, shi hidima a matsayin farko abinci domin na cikin ruwa tsuntsaye, like, narwhals, belugas, iyakacin duniya bears , kuma Foxes Arctic Foxes, sauran carnivorous kifi.

Arctic cod kifi daga ruwa a lokacin hadari, shi ne abincin terrestrial dabbobi. Its cin nama, sinadirai masu darajar high, amma saboda ta low palatability (tukuru da kuma na ruwa), Arctic cod bai zama mashahuri kasuwanci kifi. Amma shi ne mai girma ga aiki da samar da kifi abinci, gwangwani a man fetur da kuma tumatir miya, bushewa da kuma shan taba, don yi abincin dabbobi.

Tare da farko na kaka Arctic cod ɓace a cikin manyan garkunan tumaki, da motsi zuwa yamma da kuma kudu, iyo zuwa ga tudu, wanda ya yale mu mu tsayar da jari na kifi a cikin jihar bakin teku sashi da kuma a estuaries. Wannan lokaci, daga watan Oktoba zuwa Maris, a lokacin da spawning kakar a cikin Arctic cod.

A daidai wannan lokaci da ta fara zhor kamar yadda masunta ce, kuma shi ne kama kifi, ko da yake kifi da kuma ba ya bambanta dadi da dandano. Babban kama ne da za'ayi a cikin Barents kuma White Tekuna.

spawning

Spawning a dunƙule auku a yanayin zafi da ke ƙasa sifili Celsius, amma shi ne ba da muhimmanci, tun caviar daga ta sanyi-resistant da kuma iyo. Masallaci daga 7000 zuwa 60 000 qwai a iyakacin duniya cod. Kifi spawn, iyon da baya a cikin tẽku, wani lokacin yin iyo tafi a cikin bakin da ƙananan kai na gudãna.

Ta qwai drifts 3-4 watanni da aka yada a kan quite a nesa daga spawning filaye. Malki kuma bayyana ne kawai a watan Afrilu, May, amma Arctic cod tsiro da sauri da kuma ya riga ya kai shekaru uku zuwa talakawan na 17 santimita a tsawon. Ƙara kara a kowace shekara ta 2-3 cm, shi ya kai ta matsakaicin ta 6-7 shekaru.

Arctic cod kifi jima'i balaga kai a kan talakawan zuwa shekaru hudu, da kuma spawns yafi sau daya a rayuwa. A toya ciyar a kan m teku da kuma marine plankton. Tare da ci gaban da matasa toya fara farautar sauran kifi da kankanin kifi.