Alligator Diet in Relation to Alligator Mortality on Lake Griffin, FL

Rice, Amanda Nicole and Ross, J. Perran and Woodward, Allan R. and Carbonneau, Dwayne A. and Percival, H. Franklin (2007) Alligator Diet in Relation to Alligator Mortality on Lake Griffin, FL. Southeastern Naturalist, 6(1), pp. 97-110.

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Alligator mississippiensis (American Alligators) demonstrated low hatchrate success and increased adult mortality on Lake Griffin, FL, between 1998 and 2003. Dying Lake Griffin alligators with symptoms of poor motor coordination were reported to show specific neurological impairment and brain lesions. Similar lesions were documented in salmonines that consumed clupeids with high thiaminase levels. Therefore, we investigated the diet of Lake Griffin alligators and compared it with alligator diets from two lakes that exhibited relatively low levels of unexplained alligator mortality to see if consumption of Dorosoma cepedianum (gizzard shad) could be correlated with patterns of mortality. Shad in both lakes Griffin and Apopka had high levels of thiaminase and Lake Apopka alligators were consuming greater amounts of shad relative to Lake Griffin without showing mortality rates similar to Lake Griffin alligators. Therefore, a relationship between shad consumption alone and alligator mortality is not supported.

Item Type: Article
Title: Alligator Diet in Relation to Alligator Mortality on Lake Griffin, FL
Personal Creator/Author:
Rice, Amanda Nicole
Ross, J. Perran
Woodward, Allan R.
Carbonneau, Dwayne A.
Percival, H. Franklin
Journal or Publication Title: Southeastern Naturalist
Volume: 6
Number: 1
Page Range: pp. 97-110
Date: 2007
ISSN: 1528-7092
Issuing Agency: Florida Cooperative Fish and Wildlife Research Unit
Uncontrolled Keywords: Alligator mississippiensis; American alligators; Lake Griffin, Florida; nutrition; Dorosoma cepedianum; Gizzard shad; mortality
Subjects: Biology
Item ID: 5060
Depositing User: Stephanie Haas
Date Deposited: 17 Apr 2011 14:48
Last Modified: 29 Sep 2011 15:29

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