Reproductive regulation in the female Japanese minnow, Pseudorasbora parva (Cyprinidae)
書誌事項
- 公開日
- 1997-06-01
- DOI
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- 10.1023/a:1007314817526
- 公開者
- Springer Science and Business Media LLC
この論文をさがす
説明
The Japanese minnow, Pseudorasbora parva, is a multiple spawner that lays eggs repeatedly during the spawning season. In laboratory aquaria, 19 of 63 females did not spawn, whereas 44 other females laid 167 to 6285 eggs in 1 to 14 mating sequences. Neither fish density nor sex ratio (number of males per female) affected fecundity, but the increase in fish density significantly decreased the growth rate of females. The increase in male length significantly increased fecundity in aquaria which contained only a single male, whereas it decreased female growth rate. These relationships were not evident in aquaria housing three or ten males. Since larger males were more dominant and had larger testes than smaller males, the correlation between fecundity and male size strongly suggests that individual females regulated fecundity to increase their reproductive success.
収録刊行物
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- Environmental Biology of Fishes
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Environmental Biology of Fishes 49 197-205, 1997-06-01
Springer Science and Business Media LLC