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首页> 外文期刊>Tropical Zoology >Differences in reproductive strategies between two co-occurring mullets Mugil curema Valenciennes 1836 and Mugil liza Valenciennes 1836 (Mugilidae) in a tropical bay
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Differences in reproductive strategies between two co-occurring mullets Mugil curema Valenciennes 1836 and Mugil liza Valenciennes 1836 (Mugilidae) in a tropical bay

机译：两种同时出现的鱼在热带海湾中的繁殖策略差异（Mugil curma Valenciennes 1836和Mugil liza Valenciennes 1836（Mugilidae））

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摘要

The female reproductive strategies of Mugil curema Valenciennes 1836 and Mugil liza Valenciennes 1836 occurring in a tropical bay in southeastern Brazil were found to differ. Gonadosomatic index values and macroscopic staging of gonads showed that M. curema spawning took place between August and January, while M. liza spawning occurred between May and August. M. curema spawning began just before the rainy season, whereas M. lair spawned during the dry season. Estimates of absolute fecundity (F) and relative fecundity (RF) were significantly greater (P < 0.01) for M. liza (mean F = 308 x 10(4) +/- 104 x 10(3); mean RF = 1396.42 +/- 67.02) than for M. curema (mean F = 415 x 10(3) 32 x 10(3); mean RF = 750.54 +/- 40.52). Oocyte diameters were slightly greater in M Liza (0.55 to 0.82 mm) than in M. curema (0.49 to 0.71 mm). Temporal segregation of the spawning season between M curema and M liza may avoid interspecific competition between offspring that recruit in inner bay areas. Additionally, greater fecundity and oocyte size in M. liza increase the chance of reproductive success during the dry season when there is less food resources for early juveniles.
机译：发现在巴西东南部的一个热带海湾发生的Mugil curema Valenciennes 1836和Mugil liza Valenciennes 1836的雌性繁殖策略不同。性腺体指数值和性腺的宏观分期表明，M。curma产卵发生在8月至1月之间，而Liza M.产卵发生在5月至8月之间。 M. curma产卵在雨季之前开始，而M. lair在干旱季节产卵。丽莎支原体的绝对生殖力（F）和相对生殖力（RF）的估计值明显更高（P <0.01）（平均F = 308 x 10（4）+/- 104 x 10（3）;平均RF = 1396.42 + /-67.02），而不是治愈的玛氏酵母（平均F = 415 x 10（3）32 x 10（3）;平均RF = 750.54 +/- 40.52）。 M Liza（0.55至0.82 mm）的卵母细胞直径略大于克氏杆菌（0.49至0.71 mm）的卵母细胞直径。在M curma和M liza之间产卵季节的时间隔离可以避免在内海湾地区募集的后代之间的种间竞争。此外，丽莎分枝杆菌的繁殖力和卵母细胞大小增加，在旱季期间早期幼鱼的食物资源较少时，繁殖成功的机会增加。

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