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Elimination of Fish in the Giant Grebe Refuge, Lake Atitlan, Guatemala, using the Fish Toxicant, Antimycin
Author(s) -
Powers James E.,
Bowes Anne LaBastille
Publication year - 1967
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1967)96[210:eofitg]2.0.co;2
Subject(s) - toxicant , micropterus , biology , ecology , fishery , bass (fish) , fish <actinopterygii> , predation , zoology , chemistry , toxicity , organic chemistry
The elimination from the Giant Grebe Refuge, Lake Atitlan, Guatemala, of fish especially largemouth bass (Micropterus salmoides) which is the predator of the rare Giant Pied‐billed Grebe chick (Podilymbus gigas), using the new fish toxicant antimycin is described. The toxicant, which was formulated on sand, was added to the Giant Grebe Refuge waters in an amount to give a concentration of 9.3 ppb of antimycin. Within 24 hours large numbers of largemouth bass had succumbed to the effects of the toxicant. Within 10 days the toxicant had degraded to sublethal levels which allowed restocking of the refuge with small fingerlings of Poeciliopsis gracilis and Poecilia sphenops which would serve as diet for the grebes placed in the refuge.