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首页> 外文期刊>Southeastern naturalist >Relative Abundance, Growth, and Mortality of the White Catfish, Ameiurus catus L., in the St. Marys River
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Relative Abundance, Growth, and Mortality of the White Catfish, Ameiurus catus L., in the St. Marys River

机译：白鲶鱼，Ameiurus catus L.的相对丰富，生长和死亡率，在圣玛丽河里

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摘要

Declines in Ameiurus catus (White Catfish) abundance throughout much of their native range have been attributed to the rapid colonization of invasive Ictalurus furcatus (Blue Catfish) and Pylodictis olivaris (Flathead Catfish). Because of the potential for imperilment throughout a majority of its native range, we examined the White Catfish population in the St. Marys River, GA, one of the few locations where the catfish assemblage is still native. White Catfish (n = 1244) dominated the ictalurid assemblage, making up 79% of the catfish caught in the St. Marys River. Overall, length of White Catfish varied from 89 to 486 mm TL, with the majority of fish between 220 and 260 mm. Ages of White Catfish varied from 1 to 11 years but was dominated by the 2012 year class (age 3). We estimated a von Bertalannfy growth model for the population (L-infinity = 486 mm TL, K = 0.246, t(0) = -0.290). Catch-curve analysis indicated that White Catfish had a 45% annual survival rate in 2015. This White Catfish population assessment will provide biologists with baseline parameters to aid in future management and conservation of this declining native species.
机译：在其大部分原始范围内的Ameiurus catus（白色鲶鱼）丰富的下降归因于侵入性istalurus furcatus（蓝鲶）和pylodictis olivaris（蓬蓬鲶鱼）的快速定植。由于整个大多数本土范围内的危机潜力，我们在鲶鱼组合仍然是原生的少数地点中检查了圣玛丽河的白鲶人口。白鲶（n = 1244）主导了Intalurid组合，占据了圣玛丽河的79％的鲶鱼。总体而言，白色鲶鱼的长度从89〜486毫米的TL变化，大部分鱼在220和260毫米之间。白鲶鱼的年龄从1到11年变化，但由2012年课程（3岁）主导。我们估计了人口的von Bertalannfy生长模型（L-Infinity = 486 mm T1，K = 0.246，T（0）= -0.290）。 Catch-Curve分析表明，2015年白鲶的年生存率率为45％。这款白鲶人口评估将提供基线参数的生物学家，以帮助未来的管理和保护这种衰退的原生物。

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