Enye kwiintlobo ezisixhenxe zookrebe bamanzi anzulu kunye nemitha zisengozini yokuphela ngenxa yokuloba ngokugqithisileyo, ngokutsho kweminyaka esibhozo entsha. isifundo ikhutshwe namhlanje kwijenali inzululwazi.
Ngokukodwa, uhlalutyo lufumanise ukuba ookrebe kunye nemitha babanjwa njengentlanzi eyotywa ngengozi kushishino lokuloba kujoliswe kwiintlobo ezixabiseke kakhulu kurhwebo. Nangona kunjalo, zigcinwa ngenxa yexabiso leoli kunye nenyama yazo. Oku, kudibene nokwanda kwamva nje kwehlabathi kurhwebo lwe-oli yesibindi sikakrebe, kukhokelele ekwehleni kwabantu.
“Phantse isiqingatha sookrebe behlabathi sifumaneka ngaphantsi kweemitha ezingama-200, ngezantsi apho ukukhanya kwelanga kufikelela elwandle,” utsho uNicholas Dulvy, uNjingalwazi Obalaseleyo weSFU weMarine Biodiversity and Conservation.
“Ukuqala ngqa ukubona ukukhanya kwelanga kuxa betsalwa kumgangatho wephenyane lokuloba.”
Olu hlahlelo lutsha lukaDulvy luvavanye ngaphezu kwe-500 yeentlobo zookrebe kunye nemitha kwaye yabandakanya iingcali ezingaphezu kwama-300 ezivela kwihlabathi jikelele. Ifumanise ukuba malunga nama-60 ezilwanyana ezisesichengeni sokuphela kobomi ngenxa yokuloba ngokugqithisileyo, ngokwemigaqo ye-International Union for Conservation of Nature (IUCN) Red List of Threatened Species.
“Njengokuba ulwandle oluphezulu kunye namanzi aselunxwemeni esiya esiba siphela kumazwe amaninzi ehlabathi, sikhuthaza abalobi ukuba balobe kude nonxweme kwaye iye yakwazi ukuloba iteknoloji ukuloba ukuya kuthi ga kwikhilomitha ubunzulu,” utshilo uDulvy.
Ookrebe bamanzi anzulu kunye nemitha ziphakathi kwezona zilwanyana zaselwandle ezibuthathaka kakhulu ngenxa yobomi bazo obude kunye namazinga aphantsi okuzala. Banemijikelo yobomi efana nezilwanyana ezincancisayo zaselwandle ezinjengeminenga kunye neewalrus, ezazifudula zixhatshazwa ngenxa yeeoyile zazo kwaye ngoku zikhuselwe kakhulu.
“Oomanti abaninzi ookrebe kunye nemitha inokumelana noxinzelelo oluncinci kakhulu lokuloba,” utshilo uDulvy. “Ezinye iintlobo zezilwanyana zisenokuthabatha iminyaka engama-30 okanye ngaphezulu ukuba zikhule, yaye mhlawumbi ukuya kutsho kwiminyaka eli-150 kwimeko kakrebe waseGreenland, zize zivelise amantshontsho ali-12 kuphela kubo bonke ubomi bawo.”
Ookrebe kunye nemitha bagcina ukuxhamla kwabo ngokuba nesibindi esinamafutha, kodwa la mafutha axabiswa kakhulu. Isetyenziswa kakhulu kwizinto zokuthambisa, izongezo zezondlo nakumayeza, afana nogonyo. Kukwakho ukwanda kushishino lokuloba ngesityibilizi ukuxhasa imfuno yokutyibiliza etyibilikayo, into etyiwayo yesiko yaseKorea.
“Kube nempumelelo enkulu ekulawuleni ukurhweba ngeentaka zokrebe. Ngoku kufuneka sinikele ingqalelo yethu ekulawuleni urhwebo lwamazwe ngamazwe lweoli yesibindi. ”
Ukongeza ekulawuleni urhwebo lwamazwe ngamazwe ngeoli yesibindi sikakrebe, olu phononongo lukwaxhasa ukutyhala kwehlabathi ukukhusela i-30 pesenti yolwandlekazi lwehlabathi ngo-2030. Ukukhusela i-30 pesenti yolwandle olunzulu (200 ukuya kwi-2,000 yeemitha) kuya kubonelela ngama-80 ekhulwini. yeentlobo zokhuseleko oluyinxenye kuluhlu lwazo. Uthintelo lwehlabathi lonke ekulobeni ngaphantsi kweemitha ezingama-800 luya kubonelela ngama-30 eepesenti indawo yokuzimela ethe nkqo kwisinye esithathwini somngcipheko wookrebe bamanzi anzulu kunye nemitha.
I-Global Shark Trends Project yintsebenziswano yeYunivesithi yaseSimon Fraser, iQela leNgcali yeeNgcali ze-IUCN, iYunivesithi yaseJames Cook, kunye neGeorgia Aquarium, esekwe ngenkxaso evela kwiNgxowa-mali yoLondolozo lweShark.
Ibhalwe nguJeff Hodson
umthombo: I-SFU
