Dogfish okungaqhelekanga - dogfish nengwane

Ngokuqhelekileyo xa abantu bethetha ookrebe, khumbula nje emihlathini zazo eziyingozi kunye nobukhulu enkulu. Kodwa phakathi kwaba abameli babe shark nengwane dogfish, nto leyo ayingozi ebantwini. Luhlobo luni zeentlanzi?

inkcazelo shark

Ngoko nangoko kufanele kuqatshelwe ukuba kukho amanye amagama kweli uhlala elwandle: "nokotnitsa", "inja shark", "inja ulwandle", "ukrebe inameva". Xa kuthelekiswa nezinye izalamane unamazinyo, lithe ubungakanani umzimba encinane, ngokuqhelekileyo Akukho mitha ngaphezulu kwe-1.5. Aba bameli nabo cartilaginous. Ke baninzi ndiyabawela ukwazi ukuba ikhangeleka ngathi dogfish. Umzimba wakhe ngathi side, yokuluka-okwe. Umbala katrana njenge "Classic": ngwevu okanye amdaka aze abe isisu ukukhanya. Abanye abantu babe emihlubulweni nezinala. Le fin caudal inamandla ngokwaneleyo. Oku kuye kwenza umahluko - emazantsi fin amanakani okuba ngamnye liva elibukhali. Hi ndlela leyi, le nto ngamanye amaxesha ibizwa ngokuba "shark inameva". Emazantsi intloko ngenani elikhulu cross-emlonyeni. Umzimba igutyungelwe esikalini, ngathi wesigcina-sifuba kuyo, kuba lo msebenzi iye umonakalo ezi ntlanzi.

fihla silalele

Iminyaka emininzi katrana kuzingelwa ngenxa ikakhulu exolweni. ipleyiti obuboniswe nesigubungelo ngokupheleleyo umzimba wonke, abe, spikes encinane phantse imperceptible. Xa sisondela emzimbeni yentlanzi ngesandla, udibaniso luza kukhangeleka ezithambileyo kunye agudileyo, kodwa kamsinya nje ukuba uqale ukuba alwe nxamnye esikalini, u zingonzakala kakubi. Ukuziva buhlungu kakhulu.

Ukuba ulusu yonakele katrana, uya kundiphilisa ngokukhawuleza kakhulu, kwaye ngeli xesha, baziqwebele izikali ezintsha. Ekubeni dogfish nga kwenzakale Abalobi wamphatha naye kakuhle. Ngaphambili, nasesikhumbeni wentlanzi wenza mittens, leyo eyenzelwe makasilele beenkuni amatye anqabileyo. Kwakhona ngensimbi wayenxibe neefaskoti zezintsu enjalo bazikhusele ukwenzakala emsebenzini. Amanye amatye iphathwa nayo.

uhlalaphi

Inkoliso yezi abameli zifumaneka amanzi oLwandle Black. Kodwa sinako ngokukhuselekileyo sithi ukuba oku nakwiintlanzi lweMeditera, Pacific kunye neelwandle Atlantic. Ukongeza, Katrana ukudada kuLwandle Azov kwaye i Kerch Strait. Abanye wadibana inja elwandle Okhotsk kunye uLwandle Japan.

impilo shark

Akumangalisi kwaye kwaqatshelwa ukuba Katrana ngakumbi ukhetha ukuhlala kuLwandle Black. Ezi iimeko kubo zikhuselwe kuba ezinye sharks ukuqubha apha akayi kuba ngenxa ubume amanzi, ukungabikho kokutya, kubanda. Kodwa ukuqhelana ubomi enjalo ulwandle inja. Fish kumnandi kubushushu-7 - 14 degrees, ngoko ke nemida sihlangane nesele. Xa emanzini ifike ekwindla okanye isipringi, xa unyuka kubunzulu hydrogen sulphide. Overwinter iintlanzi kubunzulu ikhulu eemitha. Agcina imihlambi yabo kunye namanye "iintsapho" ezama ukuba ukuzisonga.

Zinelungelo imnyama, yaye ngamanye amaxesha ebe lolo banjiso lungako mackerel amahashe kunye anchovy, nasasebenzayo nangoku kwi network. Ngamanye amaxesha kuzingela "porpoises izibuko," kodwa hayi kaninzi, ngenxa yokuba ezi dolphins kubo kunjalo krupnovat. Intlanzi uLwandle lweMeditera kunye neelwandle ezimbini basengozini ukubanjwa iminatha okanye kudliwa zizinja yolwandle. Kwaye kwamanye amazwe elaneleyo lokufakwa namasela-katranov anikwe umvuzo. Kodwa ngoku e North-East Atlantic isigqibo sokuvala ukulotywa nengwane ookrebe, njengoko imbonakalo yazo ziphantsi kwesoyikiso yokutshabalala.

umitha

Dogfish Basenokothuka, ngokuba buvuthwe ngesondo eza ekupheleni kobomi bakhe, kule 13 - kwiminyaka eli-17. Iinkunzi ilungele zikhwela iimazi imidlalo ukuya kwiminyaka-11. umitha iqala ekupheleni kuka April kubunzulu ka 50 - 100 eemitha. Ubude lokukhulelwa katranov ithatha ukusuka kwiminyaka 1.5 ukuya 2. Qhotsa esizalweni kowesi- kuhlala 15 ziingceba. Ngaba nangoko ezizalwa ukuqala ukubonisa ubuntu bakhe karhataka. Bona buye bababambisa phezu Qhotsa ezinye iintlanzi kunye Shrimp elincinane.

Yenza katran ayingozi ebantwini

Phakathi kwabahlali kom- ukuya iintsomi ookrebe ameva ezibukhali emqolo zinetyhefu yaye nokumbulala. Enyanisweni, enameva zizaliswe bubuhlungu, kodwa wazigquma nje yencindi yomlomo. Kodwa musa uphumle, kuba ukuba uthe katran uhlanga ngomqolo yabo, lo yencindi, apho ubomi iintsholongwane bangene enxebeni kunye nokudumba iqale. Amaxesha amaninzi namabala. Kwakhona dogfish ayikho yingozi, xa siqwalasela oko nje irhamncwa. Kwimbali yonke akubangakho ityala olunye i katrana ukuhlasela umntu ngamnye.