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首页> 外文期刊>Southeastern naturalist >Aspects of the Reproductive Biology of the Skate Fenestraja plutonia (Garman) off North Carolina
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Aspects of the Reproductive Biology of the Skate Fenestraja plutonia (Garman) off North Carolina

机译:北卡罗莱纳州外来滑冰Fenestraja plutonia(Garman)的生殖生物学研究

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摘要

Fenestraja plutonia is an abundant member of the slope community in the western North Atlantic, occurring at depths of 293-1042 m. Aspects of the reproductive biology of F plutonia were examined for specimens collected off North Carolina, in the summer-fall of 2001, 2002, and 2006. Male-to-female sex ratios were not significantly different from 1:1. The smallest mature male was 215 mm TL, and the smallest mature female was 230 mm TL. Length at 50% maturity was estimated at 231 mm TL for females and 233 mm TL for males, 89 and 90% of maximum TL, respectively. Deposited egg cases (n = 107; six containing embryos), three egg-bearing females, and I I newly hatched juveniles were collected. It appears that the upper slope off Cape Lookout, NC, at the northern end of the species range, constitutes both an egg-laying area and possibly a nursery area for this species.
机译:Fenestraja plutonia是北大西洋西部斜坡群落的丰富成员,其深度为293-1042 m。在2001年,2002年和2006年夏季,从北卡罗来纳州北部采集的标本中检查了F菌的生殖生物学特性。男女性别比与1:1没有显着差异。最小的成熟雄性为215 mm TL,最小的成熟雌性为230 mm TL。雌性在50%成熟时的长度估计为231 mm TL,雄性则为233 mm TL,分别为最大TL的89%和90%。收集了鸡蛋盒(n = 107;六个包含胚胎),三个鸡蛋的雌性,以及刚孵出的幼鱼。在该物种范围的北端,北望角角附近的上坡似乎既构成了该物种的产卵区,又可能构成了该物种的育苗区。

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