Njengoba sishilo kaningi kulokhu, ulwandle luyinto engapheli ukusimangaza. Singathola izinhlobo zasolwandle ezihlukile kakhulu kangangokuthi asisoze sacabanga ukuthi zingaba khona. Lokhu kunjalo ngoshaka wekati. Yize kungesilo uhlobo olugqamile ngokuba lukhulu, kungasinikeza isithombe esihle sokulubona. Igama layo lesayensi ngu Isikali seScyliorhinus futhi ungowomndeni wakwaCarcharhiniformes shark.
Sizokutshela zonke izimfihlo nezici zikashaka wekati.
Izici eziyinhloko
Emndenini kashaka wekati singathola cishe izinhlobo ezingaba ngu-150 zisabalale ezindaweni ezishisayo zomhlaba. Kuyaziwa nangegama elijwayelekile le-dogfish noma ama-limes.
Leli gama linikezwa ngenxa yokufana okutholakala empumulweni yamehlo ayo nalesi sifo. Inomzimba ovulekile futhi omuhle ongenazo izikali nokuthungwa okufana nalokho kwe-sandpaper. Yilapho igama elivamile le-lime livela khona. Inamaphiko amabili omgogodla kuphela, okwenza kube uhlobo olukhethekile lukashaka. Ikhanda lakhe linomumo othize. Inezimfanelo ezahlukahlukene ezibukeka njengesiqu futhi zifana nezimbobo ezisekhaleni.
Isethi yoshaka bekati ivelele ngokuba yilabo abanephethini esikhunjeni sabo. Ngokungafani nokuba nombala owodwa ompunga ofana noshaka, singathola izinhlobo ezahlukahlukene zezikhumba kulo shaka ngamaphethini anjengemivimbo, amabala noma amachashazi e-polka anemibala ehlukene njengophuzi noma owolintshi.
Akuyona inhlobo kashaka enosayizi omkhulu yize ikhona ezinye ezingalingana kuze kufike kumamitha amane. Into ejwayelekile ukuthi bathola ukukala amamitha ayi-1.20. Umhlathi wayo uqine impela njengoba unamazinyo agobile futhi usayizi omncane ngci. Iwasebenzisela ikakhulukazi ukukwazi ukudla imollusk, kwesinye isikhathi ibe mincane kanti ezinye izilwane ezinjengenkala.
Indawo yekati kashaka nobubanzi
Lo shaka uzivumelanisa nanoma yiluphi uhlobo lwamanzi apholile noma asezindaweni ezishisayo, okwenza ukusatshalaliswa kwawo emhlabeni wonke kube banzi. Kunezinhlobo ezahlukahlukene ngokuya ngendawo esikuyo. Kukhona nezinye eziguqulwa eduze namazwekazi ase-Asia, e-Afrika naseMelika.
Oshaka bekati banamahloni impela ngakho ukuhlangana nabo mathupha kungaba nzima. Ubukhulu nobukhulu bayo kwenza kungabi lula ukubanjwa, yingakho iba uhlobo olungatholakali kalula. Ngokuphathelene nemvelo yayo, ezinye izinhlobo zalo mndeni Bancamela ukubhukuda ekujuleni okufinyelela kumamitha ayi-100. Kodwa-ke, kukhona abanye abakhetha amanzi angajulile.
Ithanda amanzi asezingeni elishisayo nelipholile ngoba kukhona ukudla okukunikeza izakhamzimba ezanele ukuze zikhule futhi zizalane. Singathola izibonelo ze-cat shark e-Atlantic Ocean, ikakhulukazi endaweni ejulile phakathi kweNorway ne-Ivory Coast. Ukuze ukwazi ukuzingela lezi zilwane futhi bathathe izithombe, kufanele uqaphele kakhulu ngoba azibonakali neze. Banokuziphatha okunamahloni futhi, uma bengezwa ngosayizi wabo omncane, kunzima ukubamba.
Ingabhukuda ekujuleni okungafika kumamitha ayi-2000.
Ukudla
Lo shaka udla kakhulu ekudleni kwezilwane ezincane ezingenamqolo ezitholakala ekujuleni kolwandle. Ukudla kwayo kudla kakhulu futhi kudinga inyama enkulu. Futhi inganikeza, yize kungamanani amancane, amanye anezikhala zeqiniso elilula lokukwazi ukufaka ezinye izakhamzimba ezidinga ukukwazi ukuthuthuka ezimeni.
Ngokusho kongoti besayensi yezinto zasolwandle ezibhekelele ukucwaninga ngokudla oshaka, bathi lo shaka udla ezinye izinhlanzi ezincane ngenxa yobukhulu bawo. Lokhu okuguquguqukayo okuyinhloko okuyivimbela ukuthi ikwazi ukuzingela ezinye izilwane ezizingelayo ezinkulu. Ngokuphambene nalokho, akusho ukuthi ukudla kwabo kuyindlala njengoba kunezinhlobonhlobo ezinkulu de peces ezincane kanye nezilwane ezingenamgogodla ezindaweni lapho kuhlala khona laboshaka. Lesi ngesinye sezizathu eziyinhloko zokuthi kungani lesi silwane singavamisile ukushintsha izindawo ngaphandle uma kudingekile ngenxa yokuntuleka kokudla.
Ukukhiqizwa kabusha kukati oshaka
Lo shaki une uhlobo lwazo lwe-oviparous reproduction. Lokhu kubandakanya ukubeka amaqanda endaweni ephephile futhi uma oshaka abancane bachamusela, bazimela kubazali babo. Imvamisa yindoda ephethe ukuvikela amaqanda aze achamusele. Singathola ezinye zezinhlobo zalawa oshaka ezindaweni ezingajulile ezisencane. Isibonelo, abanye oshaka abazalanayo baye babonwa emihlathini noma emifuleni.
Amandla we ukwazi ukuphinda kabili noma kathathu usayizi wakho uma uzizwa usongelwa Ingesinye sezici ezimangalisa kakhulu futhi kuyindlela yokusinda ethokozisayo. Lapho ezizwa esatshiswa yilapho ekwazi khona ukuphinda kathathu usayizi wakhe ukuphuma enkingeni. Lokhu kufezwa ngomshini onalo lonke uhlobo lwalo shaka ovumela isisu saso sonke ukuthi sithathe imilomo emikhulu yamanzi ukukhulisa usayizi waso jikelele.
Umehluko phakathi kwe-dogfish ne-cat shark
Ukuhlukanisa izinhlobo ezimbili ezifanayo, njenge-dogfish ne-cat shark, kuyadingeka ukuthi wazi ingxenye yezici zazo zangaphandle. Ake sibone umehluko omkhulu:
- Ushaka wekati unakho indunu nje ebulalayo ekhonza ukumnikeza inzuzo enkulu. I-Dogfish ayinayo.
- Lo shaka akanalo noma yiluphi uhlobo lomgogodla emaphikweni asemhlane kanti inja inazo.
- Le dogfish inombala onsundu ompunga owehlukanisa nemibala egqamile lo shaka anayo. Ngaphezu kwalokho, sishilo ukuthi bangaba nezindawo ezinemibala egqamile nezimvukuzane.
- Ikati noma ushaka banomzimba omncane kakhulu futhi unamaphiko okugcoba aqala emaphikweni okhalo. Okwesibili, i-dogfish inamaphiko emhlane atholakala ngaphezu kwamaphiko okhalo. Lokhu kwenza umzimba wayo ube mfushane ngosayizi.
Ngiyethemba ukuthi ngalolu lwazi ungafunda kabanzi ngoshaka wekati.