Life History and Spawning Behavior of the Western Sand Darter (Ammocrypta clara) in Northeast Arkansas

Autor:	Lucas J. Driver, Ginny L. Adams
Rok vydání:	2013
Předmět:	Avian clutch size education.field_of_study biology Ecology Population Zoology Ammocrypta Ammocrypta clara biology.organism_classification Darter Gonadosomatic Index Crepuscular Percidae education Ecology Evolution Behavior and Systematics
Zdroj:	The American Midland Naturalist. 170:199-212
ISSN:	1938-4238 0003-0031
DOI:	10.1674/0003-0031-170.2.199
Popis:	Members of Ammocrypta (Percidae), known as sand darters, have experienced widespread population declines, yet little is known regarding their ecology and life history. The purpose of this study was to examine life history traits and provide much needed information on the western sand darter (Ammocrypta clara) from a population in Northeast Arkansas. The Strawberry, Black, and Current rivers were sampled by seine or trawl from Jun. 2007–Sep. 2008. Life history traits were examined on 379 specimens. Mean size was 42.9 mm standard length (max. 50 km SL) and males and females reached maturity between 35–40 mm SL. The spawning season was May to Aug. and mean monthly gonadosomatic index (GSI) ranged from 3.4–4.9%. Gravid females averaged 57 eggs per clutch and mean egg size was 0.79 mm across mature, ripening, and ripe stages. Significant relationships existed between female standard length, ovarian mass, and clutch size. Observation of captive specimens in aquaria revealed crepuscular spawning with eg...
Databáze:	OpenAIRE
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