西孟加拉湾沿岸安得拉邦沿岸的 Sepia aculeata Van Hasselt（1835 年）的繁殖情况

IF 0.4 4区农林科学 Q4 FISHERIES

Indian Journal of Fisheries Pub Date : 2023-09-30 DOI:10.21077/ijf.2023.70.3.126239-07

J. Felix, M. Menon, Shubhadeep Ghosh, Latha Shenoy

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引用次数: 0

摘要

墨鱼（Sepia aculeata Van Hasselt，1835 年）是印度海域一种具有重要商业价值的墨鱼，但印度-太平洋地区对其生物学特性的研究十分有限。本研究从孟加拉湾西部安得拉邦北部沿海拖网渔业捕获的样本中观察了 S. aculeata 的生殖生物学特性。共研究了 3511 个样本，其中雌性样本 2241 个，背幔长度（DML）从 8.7 厘米到 21.4 厘米不等，重量从 78 克到 901 克不等，雄性样本 1260 个，背幔长度（DML）从 7.9 厘米到 21.9 厘米不等，重量从 54 克到 738 克不等。据估计，雌性和雄性的初熟长度分别为 14.3 和 12.6 厘米（DML）。雌雄鱼全年产卵，7 月至 10 月和 12 月至次年 2 月是两个显著的产卵高峰，间歇性产卵高峰较小。绝对繁殖力为 330±1.44 x102 个卵，相对繁殖力为 75±8.94 x102 个卵 100 g-1 体重。本研究结果可作为评估该研究区域头足类种群数量的参考。关键词：头足类；针乌贼；初生大小；产卵季节；拖网渔业

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Reproduction in Sepia aculeata Van Hasselt, 1835 along the Andhra Pradesh coast, off the western Bay of Bengal

Sepia aculeata Van Hasselt, 1835 is a commercially important cuttlefish in Indian seaswith limited studies on its biology from the Indo-Pacific region. This study, observed thereproductive biology of S. aculeata from samples landed by the trawl fishery operating offthe coast of north Andhra Pradesh, off the western Bay of Bengal. A total of 3511 sampleswere studied, of which 2241 were females having dorsal mantle length (DML) ranging from8.7 to 21.4 cm and weight from 78 to 901 g and 1260 were male specimens of DML rangingfrom 7.9 to 21.9 cm and weight from 54 to 738 g. Females dominated the landings with a sexratio of 1.78. The length at first maturity was estimated at 14.3 and 12.6 cm DML for femalesand males, respectively. Both sexes spawned throughout the year with two significant peaksfrom July to October and from December to February with minor intermittent peaks. Theabsolute fecundity ranged from 330±1.44 x 102 eggs, with a relative fecundity of 75±8.94 x102 eggs 100 g-1 body weight. The results of this study may be used as inputs in assessingthe stock of S. aculeata in the study region. Keywords:Cephalopods, Needle cuttlefish, Size at firstmaturity, Spawning season, Trawl fisheries

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来源期刊

Indian Journal of Fisheries FISHERIES-

CiteScore

0.90

自引率

20.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Indian Journal of Fisheries is published quarterly by the Indian Council of Agricultural Research (ICAR), New Delhi. Original contributions in the field of Fish and fisheries science are considered for publication in the Journal. The material submitted must be unpublished and not under consideration for publication elsewhere. Papers based on research which kills or damages any species, regarded as thratened/ endangered by IUCN crieteria or is as such listed in the Red Data Book appropriate to the geographic area concerned, will not be accepted by the Journal, unless the work has clear conservation objectives.