Diet composition of an invasive population ofLithobates catesbeianus(American Bullfrog) from Argentina

Autor:	Lorena B. Quiroga, Ariel Aníbal Cataldo, Juan Héctor Aragón-Traverso, Eduardo Alfredo Sanabria, Juan Pablo Segundo Olivares, María Victoria Pantano, María Daniela Moreno
Rok vydání:	2015
Předmět:	education.field_of_study Ecology Lithobates Population Aeglidae Introduced species Biology biology.organism_classification Invasive species Predation Bullfrog education Ecology Evolution Behavior and Systematics Trophic level
Zdroj:	Journal of Natural History. 49:1703-1716
ISSN:	1464-5262 0022-2933
DOI:	10.1080/00222933.2015.1005711
Popis:	The American bullfrog Lithobates catesbeianus has been introduced around the world, with invasive populations reported from almost all South American countries. A population of this species was introduced in the Calingasta department of San Juan province, which is an arid environment in western Argentina. This work provides information on the dietary composition of an invasive population of L. catesbeianus, and compares the degree of dietary overlap between adults and juveniles. Stomach contents of 169 bullfrogs (82 adults and 87 juveniles) were analysed. Adults consumed 40 prey taxa and Hymenoptera (Insecta) was the most numerous prey item (41.8%), followed by Araneae (13.6%) and Aeglidae (13.4%). Juveniles consumed 29 prey taxa and Hymenoptera constituted the highest percentage in prey number (77.2%). The trophic overlap niche index at the same level shows a value of 0.64 overlap in dietary community between adults and juveniles of this bullfrog. Aeglidae was volumetrically the most important trophic it...
Databáze:	OpenAIRE
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