ISSN:
1573-5133
Keywords:
Temperature preference
;
Temperature tolerance
;
Seasonal effects
;
CTMax
;
Fishes
;
Etheostomatini
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Synopsis Riffle dwelling fantail darters (Etheostoma flabellare) selected lower temperatures in winter (19.3°C) compared to pool dwelling johnny darters (E. nigrum; 22.0°C. A similar trend was evident in summer tests (fantail darters, 20.3°C; johnny darters, 22.9°C). Summer tested animals selected higher temperatures than winter tested animals maintained at the same acclimation temperature and photoperiod. When tested together in the same gradient, both species appeared not to thermoregulate, but tended to avoid each other. Critical thermal maxima (CTMax) did not differ between seasons for either species (fantail darters, 31.1°C winter, 31.3°C summer; johnny darters, 30.9°C winter, 30.5°C summer). Differences in the thermal responses of these darters correlated with differences in their respective habitats.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00002262
Permalink
