Leandro, S.M., H. Queiroga, L. Rodríguez-Graña & P. Tiselius. (2006). Temperature dependent development and somatic growth in two allopatric populations of Acartia clausi (Copepoda: Calanoida). Marine Ecology Progress Series. 322:189-197.

99158

10.3354/meps322189 [view]

Leandro, S.M., H. Queiroga, L. Rodríguez-Graña & P. Tiselius

2006

322:189-197.

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This study compares the effect of temperature on the post-embryonic development time and weight-specific growth rate in 2 populations of Acartia clausi from different biogeographic areas (northern and southern Europe). Development was followed from nauplius I to adult at 3 tempera- tures (10, 15 and 18°C) at saturating food conditions. The relationship between development time and temperature was established by fitting Belehradek’s function. The northern population had a shorter generation time at all temperatures. At 10°C, the development time was estimated to be 33.9 and 36.4 d decreasing to 16.3 and 17.4 d at 18°C for the northern and southern populations, respec- tively. Prosome length decreased with temperature, and the southern population had longer individ- uals at all temperatures. ANCOVA revealed a significant (p < 0.001) positive effect of temperature on the growth rates, and nauplii grew faster than copepodites (except at 18°C in the southern population and 20°C in the northern population). Significant differences between populations were noted dur- ing larval growth, with nauplii from the north growing faster at high temperatures (18°C). The results indicate that the 2 A. clausi allopatric populations subjected to different temperature regimes have different temperature responses, in particular at high temperatures.

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