Pogwiritsa ntchito makina opangira magetsi a Manuel Moreno Torres pamtsinje wa Grijalva, zinthu zachilengedwe zidasinthidwa ndipo magombe amchenga agwiritsidwe ntchito ndi ng'ona yamtsinje posowa, zomwe zidapangitsa kuti mitundu iyi ichulukane. Ku Tuxtla Gutiérrez, Chiapas, malo osungira zinyama a Miguel Álvarez del Toro, odziwika bwino kuti ZOOMAT, adayambitsa pulogalamu mu 1993 yoteteza ng'ona zomwe zimakhala mdera la Sumidero.
Mu Disembala 1980, pomwe makina opangira magetsi adayamba kugwira ntchito, malo a 30 km m'mphepete mwa mtsinje wa Grijalva adalengezedwa kuti ndi Sumidero Canyon National Park. Akatswiri a sayansi ya zamoyo a ZOOMAT adawona kuti ndikofunikira kuteteza ndikuchirikiza kusungidwa kwa Crocodylus acutus pochita zochitika zosiyanasiyana mu situ ndi ex situ, monga kusonkhanitsa mazira amtchire ndi ana ang'onoang'ono, kubereka mu ukapolo, kumasulidwa kwa nyama zopangidwa mu zoo kupitiriza kwa ng'ona za paki. Umu ndi momwe Crocodylus acutus Baby Release Program idabadwira ku Cañón del Sumidero National Park.
Pazaka khumi zakugwira ntchito, zatheka kuti abwezeretsenso ana 300 kumalo awo achilengedwe, ndikuyerekeza kuti apulumuka 20%. Mwa awa, 235 adabadwira ku ZOOMAT kuchokera m'mazira omwe amasonkhanitsidwa pakiyo ndikuwasakaniza mwanzeru; ochepa ndi ana a ng'ona omwe amakhala kumalo osungira nyama kapena osonkhanitsidwa. Kudzera powerengera pamwezi ku Sumidero canyon, zalembedwa kuti nyama zazikulu kwambiri komanso zakale kwambiri zomwe zatulutsidwa ndi ng'ona zitatu zazaka zisanu ndi zinayi zomwe mu 2004 zidzakhala zazikulu, zimaganiziridwa kuti ndizazimayi ndipo kutalika kwake kupitilira mita 2.5 .
Luis Sigler, wofufuza za zoology komanso woyang'anira pulogalamuyi, akuwonetsa kuti kudzera munjira zokhazikitsira makulidwe amayesetsa kubereka akazi ambiri kuposa amuna kuti athandize kuchulukitsa anthu. M'miyezi yotentha kwambiri mchaka, makamaka mu Marichi, amapatsidwa ntchito yopeza zisa ndikuzitengera kumalo a ZOOMAT; chisa chilichonse chimakhala ndi mazira 25 mpaka 50 ndipo chisa chachikazi kamodzi pachaka. Achichepere amatulutsidwa ali ndi zaka ziwiri, akafika kutalika kwa masentimita 35 mpaka 40. Chifukwa chake, mwana wazaka chimodzi kapena ziwiri amasungidwa kundende nthawi yomweyo, kuphatikiza pa omwe akukhalitsa.
Sigler ali ndi chiyembekezo pantchito yosamalira: "Zotsatira zake ndizolimbikitsa, tikupitilizabe kupeza nyama zomwe zatuluka zaka zambiri, zomwe zikuwonetsa kuti kupulumuka kwanthawi yayitali kukuyenda bwino. Poyang'anira masana m'dera lowerengera, 80% yaomwe akuwona amafanana ndi nyama zomwe zapatsidwa, zomwe zikutanthauza kuti ng'ona zawonjezeka kwambiri, zomwe zimapindulitsa kwambiri madera omwe amadzipereka kukaona malo kudzera pa kukwera ngalawa kudzera nkhalango ya National ". Komabe, akuchenjeza kuti palibe chilichonse chomwe chingachitike ngati palibe njira yowunikira yomwe ikugwirizana ndi zosowa zachilengedwe.
Crocodylus acutus ndi imodzi mwamitundu itatu ya ng'ona yomwe ilipo ku Mexico ndipo yomwe imagawidwa kwambiri, koma mzaka 50 zapitazi kupezeka kwake m'malo ochezera zakale kwatsika. Ku Chiapas pakadali pano amakhala m'chigwa cha m'mphepete mwa Mtsinje wa Grijalva, pakatikati pakukhumudwa kwa boma.
