Gonad Homogeneity, Maturity, and Gonado-Somatic Index of Wild Indonesian Eel (Anguilla bicolor bicolor McClelland, 1844)

Natural and Life Sciences Communications Pub Date : 2023-07-10 DOI:10.12982/nlsc.2023.046

B. Retnoaji, Adhi Prasetyo, Nur Indah Septriani, Fajar Sofyantoro, N. Mochioka

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Abstract

Abstract The current study was conducted to investigate the homogeneity of gonad maturity in Anguilla bicolor bicolor, and whether Gonado-Somatic Index (GSI) is a reliable indicator of this maturity. Eel samples were obtained from fishermen at Segara Anakan, Cilacap, Central Java, Indonesia in December 2015, and May 2017. Fourteen specimens were analyzed based on their gonad histological structure from cranial, medial, and caudal portions and were measured for GSI values. The present study shows that there is a synchronization of oocyte maturity time on the medial, cranial and caudal parts. It might suggest that during the maturation process, Anguilla develop into silver eels and return to the sea to spawn. The highest GSI value is 2.67 in the female eel containing the highest number of mid-vitellogenic oocytes. Based on these results, it can be suggested that GSI are a suitable parameter for measuring the gonadal maturity of female A. bicolor bicolor. Keywords: Gonadal maturity, Homogeneity, Indonesian eel, A. bicolor bicolor, Segara Anakan

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野生印尼鳗鲡(Anguilla bicolor bicolor McClelland, 1844)性腺均匀性、成熟度和性腺-体细胞指数

摘要本研究旨在探讨双色安圭拉(Anguilla bicolor bicolor)性腺成熟度的同质性，以及性腺体细胞指数(Gonado-Somatic Index, GSI)是否可作为该性腺成熟度的可靠指标。鳗鱼样本于2015年12月和2017年5月从印度尼西亚中爪哇省奇拉卡普的Segara Anakan渔民处获得。根据14个标本的颅骨、内侧和尾端性腺组织学结构进行分析，并测量GSI值。目前的研究表明，卵母细胞成熟时间在内侧、颅部和尾部是同步的。这可能表明，在成熟过程中，安圭拉发育成银鳗，并返回大海产卵。在卵黄中卵母细胞数量最多的雌鳗中，GSI值最高，为2.67。综上所述，GSI可以作为衡量雌雄双色花雌雄成熟度的一个比较合适的参数。关键词:性腺成熟度，同质性，印尼鳗鲡，双色鳗，阿纳坎鱼

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Natural and Life Sciences Communications

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0.20

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