对印度西南部深水对虾 Metapenaeopsis andamanensis (Wood-Mason in Wood-Mason and Alcock, 1891) 卵巢成熟和生殖特征的认识

IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY
Aghana Muralidharan , Rekha Devi Chakraborty
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引用次数: 0

摘要

本研究深入探讨了Metapenaeopsis andamanensis的生殖特征,这是一种具有重要商业价值的深水虾,于2019年9月至2022年5月期间在印度科拉姆(Kollam)近海的Sakthikulangara(北纬8°56′60.78″/东经76°32′34.27″)采集。尽管该物种具有重要的经济价值,但其繁殖特征仍然难以捉摸。本研究全面考察了与安达曼鲑性腺成熟阶段相关的宏观和微观特征,包括初熟个体大小(CL50)、性腺指数和繁殖力的测定。雌雄性别比为 1:1.03。雄性和雌性最小的成熟个体体长分别为 12 毫米和 16 毫米。宏观观察根据性腺颜色将雌性分为五组,而显微镜检查则根据组织学特征确定了七个阶段。值得注意的是,该物种的卵母细胞胞质外围没有皮质隐窝,这是 Metapenaeopsis 属的一个特征。根据宏观和微观观察,雄性个体被分为两类。成熟雌性个体的性腺指数从 4.25 到 10.13 不等,在第四阶段前有显著增加。产卵持续不断,在 5 月和 11 月达到高峰。雌性和雄性初熟个体的体长分别为 23.05 毫米和 17.53 毫米。计算得出的平均绝对受精率为 53 889 个卵母细胞,平均相对受精率为 9934 个卵母细胞。这项调查有助于深入了解深水对虾的繁殖特征,从而为制定可持续渔业的有效管理策略提供帮助。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Insights into ovarian maturation and reproductive traits of the deep-water penaeid shrimp Metapenaeopsis andamanensis (Wood-Mason in Wood-Mason and Alcock, 1891) from southwestern India

The present study delves into the reproductive characteristics of Metapenaeopsis andamanensis, a commercially significant deep-water shrimp collected from Sakthikulangara, off Kollam, India (8°56′60.78″ N/76°32′34.27″ E) during September 2019 to May 2022. Despite its economic importance, the reproductive traits of this species remain elusive. This research comprehensively examines macroscopic and microscopic features associated with gonadal maturity stages, including determination of size at first maturity (CL50), gonadosomatic index, and fecundity of M. andamanensis. Male-to-female sex ratio was noted as 1:1.03 using chi-square analysis. The smallest mature individuals were observed at 12 mm and 16 mm carapace length for males and females, respectively. Macroscopic observation categorized females into five groups based on gonadal coloration, while microscopic examination identified seven stages using histological characteristics. Notably, the absence of cortical crypts in the periphery of oocyte cytoplasm, a characteristic feature of the genus Metapenaeopsis, was observed in this species. Males were classified into two categories based on macroscopic and microscopic observation. The gonadosomatic index ranged from 4.25 to 10.13 for mature female individuals, exhibiting a significant increase until stage IV. Continuous spawning was observed, with a peak in May and November. The size at first maturity for females and males was determined as carapace length (CL) 23.05 mm and 17.53 mm, respectively. The average absolute fecundity was calculated as 53,889 with an average relative fecundity of 9934 oocytes. This investigation contributes valuable insights into the reproductive traits of the deep-water penaeid shrimp M. andamanensis, facilitating the development of effective management strategies for sustainable fisheries.

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来源期刊
CiteScore
4.60
自引率
4.20%
发文量
144
审稿时长
18.3 weeks
期刊介绍: Deep-Sea Research Part I: Oceanographic Research Papers is devoted to the publication of the results of original scientific research, including theoretical work of evident oceanographic applicability; and the solution of instrumental or methodological problems with evidence of successful use. The journal is distinguished by its interdisciplinary nature and its breadth, covering the geological, physical, chemical and biological aspects of the ocean and its boundaries with the sea floor and the atmosphere. In addition to regular "Research Papers" and "Instruments and Methods" papers, briefer communications may be published as "Notes". Supplemental matter, such as extensive data tables or graphs and multimedia content, may be published as electronic appendices.
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