Effect of water temperature and size of females on the timing of spawning of perch Perca fluviatilis L. in Lake Geneva from 1984 to 2003

被引:37
|
作者
Gillet, C. [1 ]
Dubois, J. P. [1 ]
机构
[1] Stn Hydrobiol Lacustre, F-74203 Thonon Les Bains, France
关键词
egg-ribbon; Perca fluviatilis L; spawning; temperature;
D O I
10.1111/j.1095-8649.2007.01359.x
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
The effects of water temperature on the timing of spawning of perch Perca fluviatilis in Lake Geneva were assessed in a 20 year survey (1984-2003). Spawning started at the end of April or at the beginning of May, when the water temperature rose to > 10 degrees C, but most of the spawns were laid when water temperature exceeded 12 degrees C. This led to a positive correlation between the date of the mid-spawning period and the date when the water temperature rose to > 12 degrees C. Large perch had a tendency to spawn later than the small ones, which led to a positive correlation between the date of mid-spawning period and the yearly mean width of perch egg-ribbons. The coefficient of multiple determination between the date of mid-spawning period and the mean width of the ribbon of spawn, combined with the date when the water temperature rose to > 12 degrees C was r(2) = 0.77. The perch generally chose deeper spawning places (12 m) at the end of the spawning period than at the beginning (4 m), which was related to water temperature.
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页码:1001 / 1014
页数:14
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