Dogfish Okungajwayelekile - dogfish izihlahla ezinameva

Ngokuvamile lapho abantu bakhuluma ngokuthuthukisa oshaka, nje ukukhumbula emihlathini yawo iyingozi nosayizi omkhulu. Kodwa phakathi kwalaba abameleli babe ushaka spiny dogfish, engesiyo yingozi kubantu. Luhlobo luni lwenhlanzi okungenzeka?

incazelo ushaka

Ngokushesha kufanele kuphawulwe ukuthi kukhona amanye amagama kule ohlala ulwandle: "nokotnitsa", "inja ushaka", "ulwandle inja", "ushaka prickly". Uma kuqhathaniswa nezinye izinto izihlobo toothed, enendawo usayizi umzimba ezincane, ngokuvamile akukho kuka 1.5 amamitha. Lezi abameleli nawo cartilaginous. Kodwa abaningi lokwazi ukuthi kubukeka sengathi dogfish. Isidumbu sakhe ubonakala side, uthi lokuphotha-okwenyanga. Umbala katrana ngokuthi "zakudala ': grey nobe lonsundvu esiswini ukukhanya. Abanye abantu babe ezinhlangothini nezinala. Fin caudal inemandla. Le nhlanzi has umehluko - ngasesinqeni se amaphiko ngamunye fin has ameva abukhali. By endleleni, lokhu yingakho ngezinye izikhathi ibizwa ngokuthi "ushaka prickly". Ezansi ikhanda has a cross-umlomo omkhulu. Umzimba embozwe izikali, efana lensimbi, kuba lesi sici isibe okubhubhisa lezo zinhlanzi.

fihla ezimangelengele

Kwaphela iminyaka eminingi katrana ezingelwa ikakhulukazi ngenxa izikhumba. ipuleti okukaliwe esehlanganise ngokuphelele yonke inyama yakhe, abe encane, spikes cishe imperceptible. Uma Siwathola emzimbeni izinhlanzi ngesandla, kuyoba kubonakale soft and smooth, kodwa ngokushesha nje lapho uqala ukuba ilwe ngokumelene izikali, ungakwazi uzolimala kabi. Ukuzizwa buhlungu kakhulu.

Uma isikhumba lilimele katrana, ke sizophola ngokushesha okukhulu, futhi kuleli qophelo, buthelela izilinganiso ezintsha. Njengoba dogfish kungaba ona abadobi wamphatha ngomusa. Ngaphambili, kusukela isikhumba senhlanzi wenza amagilavu, ayehloselwe ukugaya izinkuni namatshe ayigugu. Futhi ngensimbi wayegqoka amaphinifa yesikhumba ezinjalo ukuze bazivikele ukulimala emsebenzini. Amanye amatshe akhe ziphathwa nalo.

lapho izimpilo

Eziningi zalezi abameleli ingatholakala amanzi oLwandle Olumnyama. Kodwa singakwazi kugcwale umlomo ukuthi lesi futhi izinhlanzi Mediterranean, Pacific nasolwandle Atlantic. Ngaphezu kwalokho, Katrana ukubhukuda oLwandle Azov futhi le Kerch Strait. Ezinye sihlangabezane inja e kolwandle Okhotsk futhi Sea of Japan.

ukuphila ushaka

Akumangazi-ke ukuthi Kwaphawulwa ukuthi Katrana ngokuya uthanda ehlala oLwandle Olumnyama. Lezi zimo ngabo avikelekile ngoba nabanye oshaka ukubhukuda lapha ngeke ngenxa yokwakheka amanzi, ukungabikho kokudla, abandayo. Kodwa ngizama ukuzijwayeza indlela ayengakwenza ukuphila okunjalo ulwandle inja. Fish kuyelapha ezingeni lokushisa 7 - 14 degrees, ngakho cishe emikhawulweni meet. Emanzini angajulile kuziwa ekwindla noma entwasahlobo, lapho ekuphumeni kusuka hydrogen sulphide ukujula. Overwinter izinhlanzi ngesikhathi eyikhulu amamitha ukujula. Imihlambi yabo futhi nabanye "imikhaya" ezama akufanele zihlangene.

Zinenhliziyo emnyama okuhle, futhi ngezinye izikhathi behamba ukuntshontsha catch horse mackerel futhi anchovy, okuyizinto namanje inethiwekhi. Ngezinye izikhathi ukuzingela "itheku porpoises," kodwa hhayi kaningi, ngoba lezi amahlengethwa ngabo kunjalo krupnovat. Fish yoLwandle LwaseMedithera nezilwandlekazi ezimbili asengozini kokuba ebanjwa ngamanetha noma yizinja ulwandle. Futhi emazweni athile wokubamba amasela-katranov unikezwa umvuzo. Kodwa manje North-East Atlantic sinqume ukuba zivimbele ekubambeni oshaka izihlahla ezinameva, njengoba ukubukeka kwabo wasongelwa yokuqothulwa.

kokuzalela isizini

Dogfish ingase ikumangaze, ngoba ukuvuthwa yayo ngokobulili kufika ekupheleni kokuphila kwakhe, 13 - engu-17. Amaduna isilungele ngokumitha kwemihlambi ngaphakamisa imidlalo iminyaka engu-11. kokuzalela isizini iqala ngasekupheleni April at 50 ukujula - 100 metres. Isikhathi sokukhulelwa katranov Uthatha 1.5 2 iminyaka. Fry esizalweni insikazi ngokuvamile izingcezu-15. Ingabe ezizalwa ngokushesha saqala ukukhombisa ubunjalo bakhe okuzingela. Bona ezidla gazinga zithole ukuthi ezinye izinhlanzi nezimfanzi encane efana.

Ingabe katran yingozi abantu

Phakathi izakhamuzi ukuzikhohlisa hamba izinganekwane ukuthi oshaka ameva abukhali emhlane wakhe zinobuthi futhi zingaba abulale ngisho nesilwane. Eqinisweni, ameva zigcwele ubuthi, kodwa nje embozwe isikhwehlela. Kodwa musa uphumule, ngoba uma katran ona emgogodleni yabo, lokhu isikhwehlela, lapho ukuphila bacterium aqala esilondeni bese kuqala ukuvuvukala. Ngokuvamile izibazi. Futhi dogfish akuyona esiyingozi, uma sicabanga ke njengoba nomzingeli. Kuwo wonke umlando kwakungekho Udaba olulodwa i katrana ukuhlasela umuntu ngamunye.