Light preferences of red swamp crayfish (Procambarus clarkii)

被引：0
|
作者：
Pavel Kozák
José Martín Gallardo
José C. Escudero García
机构：
[1] Research Institute of Fish Culture and Hydrobiology,Faculty of Fisheries and Protection of Waters
[2] University of South Bohemia in České Budějovice,Ecology Area, Vegetal Biology, Ecology, and Earth Sciences Department
[3] Extremadura University,undefined
来源：
Hydrobiologia | 2009年 / 636卷
关键词：
Red swamp crayfish; Light intensity; Selective behaviour; Discrete gradient;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Light intensity preferences of Procambarus clarkii (Girard, 1852) were evaluated in an indoor fiber glass trough, consisting of five equal length (4 m) zones with light intensities varying from dark to 1,000 lux (L), situated at the ‘Las Vegas del Guadiana’ fish farm in Extremadura (Spain). Four trials were performed, with different light zones set in three at sections of the trough, and the fourth providing a control with one light density (300 L) throughout the trough. Whereas the highest intensity (1,000 L) was preferred in trials 1 and 2, the dimmest condition (D) was favored in trial 3. Crayfish showed a strong preference to both outside ends of the trough, and the “end effect” of the trough on position of the crayfish was found to be stronger than the impact of light intensity.
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