UMary Allen
Izimvu zamanzi ziyizilwane ezincelisayo. Bayiqembu lezilwane ezidla ezinye ezihlala olwandle nasezindaweni ezizungezile. Akuvamile futhi ukuthi bahlale emachibini. Okhokho bezimvu zamanzi babehlala emhlabeni bese bejwayela amanzi. Nokho, ngokungafani nemikhomo, izimvu zamanzi nazo ziza ogwini.
Izimvu zamanzi ezinkulu ezaziwayo ziyizimvu zamanzi ezinoboya nama-walrus. I-grey seal ihlala eNorth Sea naseBaltic Sea futhi iyisilwane esikhulu kunazo zonke eJalimane. Izinja zezindlovu zingakhula zibe amamitha ayisithupha ubude. Lokhu kuzenza zibe zinkulu kakhulu kunezilwane ezidla ezinye emhlabeni. Uphawu oluvamile lungolunye lwezinhlobo zezimvu zamanzi ezincane. Zikhula cishe imitha nengxenye ubude.
Ziphila kanjani izimvu zamanzi?
Izimvu zamanzi kufanele zikwazi ukuzwa nokubona kahle ngaphansi kwamanzi nasemhlabeni. Amehlo asengabona kancane, ngisho nasekujuleni. Noma kunjalo, bangakwazi ukuhlukanisa imibala embalwa lapho. Abezwa kahle emhlabeni, kodwa kungcono kakhulu ngaphansi kwamanzi.
Izimvu zamanzi eziningi zidla izinhlanzi, ngakho ziyakwazi ukutshuza. Izimvu zamanzi zezindlovu zingatshuza isikhathi esingafika emahoreni amabili futhi zehle ziye kumamitha ayi-1500 - zinde kakhulu futhi zijule kakhulu kunezinye izimvu zamanzi eziningi. Ama- Leopard seal nawo adla amaphengwini, kuyilapho ezinye izinhlobo zidla ama-squid noma ama-krill, okungama-crustacean amancane atholakala olwandle.
Izimvu zamanzi eziningi ezinsikazi zithwala umdlwane owodwa ezibelethweni zazo kanye ngonyaka. Ukukhulelwa kuthatha izinyanga eziyisishiyagalombili kuya ngaphezu konyaka, kuye ngezinhlobo ze-seal. Ngemva kokubeletha, bawumunca ngobisi lwabo. Akuvamile ukuba kube namawele. Kodwa omunye wabo uvame ukufa ngenxa yokuthi alitholi ubisi olwanele.
Ingabe izimvu zamanzi zisengozini?
Izitha zezimvu zamanzi oshaka nemikhomo ebulalayo, namabhere ase-Arctic. E-Antarctica, izimvu zamanzi ezingwe zidla izimvu zamanzi, nakuba ziyizinhlobo zezimvu zamanzi ngokwazo. Iningi lezimvu zamanzi liphila iminyaka engaba ngu-30.
Abantu babevame ukuzingela izimvu zamanzi, njengama-Eskimo enyakatho ekude noma aboMdabu base-Australia. Babedinga inyama yokudla nezikhumba zokugqoka. Amanoni bawashisa ezibanini ukuze kube nokukhanya nokufudumala. Nokho, bake babulala izilwane ngazinye kuphela, ukuze lezi zinhlobo zezilwane zingabi sengozini.
Nokho, kusukela ekhulwini le-18, amadoda ayehamba olwandle ngemikhumbi futhi abulala wonke amaqoqo ezimvu zamanzi ezweni. Bavele babakhumula bashiya imizimba yabo. Kuyisimangaliso ukuthi uhlobo olulodwa lwezimvu zamanzi lwaqedwa.
Ziyanda izishoshovu zamalungelo ezilwane ezimelana nalokhu kubulala. Ekugcineni, amazwe amaningi asayina izivumelwano ezithembisa ukuvikela izimvu zamanzi. Kusukela lapho, awusakwazi ukuthengisa izikhumba ze-seal noma amafutha e-seal.