首页> 外文期刊>Southeastern naturalist >Reproductive Seasonality and Life-history Traits of the Coastal Darter, Etheostoma colorosum (Pisces: Percidae), from the Escambia River Drainage of Florida
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Reproductive Seasonality and Life-history Traits of the Coastal Darter, Etheostoma colorosum (Pisces: Percidae), from the Escambia River Drainage of Florida

机译:来自森林河流的佛罗里达州埃斯默博河排水

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I took samples of Etheostoma colorosum (Coastal Darter) from Canoe Creek, a tributary to the Escambia River in northwest Florida. Examination of ovaries from female darters showed reproduction (presence of clutch-bearing females) occurred from January into June 1989, with the greatest activity (percentage of clutch-bearing females) occurring mid-February to early May. Females begin reproducing at age 1 and can live 2 years. During the height of the reproductive season, females measuring 27-42 mm standard length produced clutches of 5-69 eggs. Clutch size, adjusted for female length, was greater mid-season in March than in February or April and May. Mature oocytes averaged 1.06 mm diameter, mean ripening oocyte diameter was 1.12 mm, and mean ripe egg diameter was 1.22 mm.
机译:我从佛罗里达州西北部的埃塞比亚河上的支流中取自独木舟溪的etheostoma colorosum(沿海达特)样本。 雌性用车的卵巢检查显示繁殖(携带离合器女性的存在)发生在1989年6月,最大的活动(离合器轴承的女性百分比)发生在5月期初。 女性在1岁开始繁殖,可以活2年。 在生殖季节的高度期间,女性测量27-42 mm标准长度产生5-69个鸡蛋的离合器。 对于女性长度调整的离合器尺寸,比2月或4月和5月在3月份更大的赛季。 平均成熟的卵母细胞直径1.06毫米,平均成熟卵母细胞直径为1.12mm,平均成熟卵直径为1.22mm。

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