Comparison of different models to predict the in situ embryonic developmental rate of fish, with special reference to white sucker (Catostomus commersoni)

被引:23
作者
Hamel, P [1 ]
Magnan, P [1 ]
East, P [1 ]
Lapointe, M [1 ]
Laurendeau, P [1 ]
机构
[1] UNIV QUEBEC, DEPT CHIM BIOL, TROIS RIVIERES, PQ G9A 5H7, CANADA
关键词
D O I
10.1139/cjfas-54-1-190
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
We performed laboratory incubations of white sucker (Catostomus commersoni) eggs to determine (i) the incubation time to organogenesis, eyed egg, hatching, and swim-up phases at eight different temperatures (8.5-21.2 degrees C), and (ii) the best model to describe the relationship between these incubation times and temperature. Seven models (degree-day, power-law, Belehradek's equation, quadratic equation, first- and second-order exponentials, and a thermodynamic model) all gave comparable and highly significant fits to our data (R-2 > 0.90). We thus compared the in situ and predicted incubation times by (i) the degree-day model, because of its simplicity, and (ii) the thermodynamic model, because of its theoretical foundation. The degree-day model was at least as accurate as the thermodynamic model (overall mean difference between predicted and observed incubation times of 1.4 +/- 1.0 and 1.2 +/- 1.2 days for the thermodynamic and degree-day models, respectively). Given its high accuracy and simplicity of use, we conclude that the degree-day model should be used to predict the incubation times of white sucker. We also observed a synchronization of hatching in situ that suggested an influence of photoperiod in addition to that of water temperature.
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页码:190 / 197
页数:8
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