KARAKTERISTIK BIOLOGIS IKAN TONGKOL (Euthynnus affnis) HASIL TANGKAPAN PURSE SEINE DI PERAIRAN HERLANG TELUK BONE, INDONESIA

海洋渔业 Pub Date : 2022-08-25 DOI:10.29244/jmf.v13i1.37825

Muhammad Jamal, Ernaningsih Ernaningsih, Nadiarti Nadiarti

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引用次数: 0

Abstract

Purse seine fishing gear is designed to catch both large and small pelagic fish, and commonly used in tuna fisheries. However, this gear is not size-selective, and can pose a threat to fish stocks. The aim of this study was to obtain information on the biological characteristics of little tuna (Euthynnus affinis) caught by purse seiners operating in the waters of Herlang District in Bulukumba Regency, South Sulawesi, Indonesia. Data collected from March to May 2019 included little tuna fork length (FL), weight, sex, and gonad maturity stage (GMS). Fish characteristics analysed in this study were length-weight relationship, size distribution, life phase, and gonadal maturity. Analyses were performed in MS Excel 2010 and Graphpad Prism v.5.03. Male and female little tuna had isometric growth patterns. Modal length class was 24.0-24.4 cm for males and 23.0-23.4 cm for females. All fish caught were below 30 cm TL, while the mean size at first maturity for this species is 39.8 cm. Although the catch was dominated by immature fish (GMS I and GMS II), all GMS stages were present for both sexes, with around a third of females in GMS III-V. Keywords: Scombridae, gonad maturity stage, length-weight relationship, early maturation, fishing pressure.

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围网渔具设计用于捕获大型和小型远洋鱼类，通常用于金枪鱼渔业。然而，这种渔具没有大小选择性，可能对鱼类种群构成威胁。本研究的目的是获取在印度尼西亚南苏拉威西Bulukumba reggency Herlang地区水域作业的围网渔船捕获的小金枪鱼(Euthynnus affinis)的生物学特性信息。2019年3月至5月收集的数据包括小金枪鱼叉长(FL)、体重、性别和性腺成熟期(GMS)。本研究分析了鱼类的长重关系、大小分布、生活阶段和性腺成熟度。在MS Excel 2010和Graphpad Prism v.5.03中进行分析。雄性和雌性小金枪鱼的生长模式是等长的。模态长度等级雄性为24.0 ~ 24.4 cm，雌性为23.0 ~ 23.4 cm。所有捕获的鱼都在30 cm TL以下，而该物种初成熟时的平均尺寸为39.8 cm。尽管捕捞量以未成熟鱼(GMS I和GMS II)为主，但所有GMS阶段均有雌雄鱼出现，GMS III-V期约有三分之一的雌性鱼。关键词:鲉鱼科，性腺成熟期，长重关系，早熟，捕捞压力

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来源期刊

海洋渔业

自引率

0.00%

发文量

4336

期刊介绍： “Marine Fisheries”started publication in 1979, it mainly covers original research papers and reviews on basic theories and applications of aquaculture and fisheries, including marine biology, mariculture and reproduction, aquatic diseases and prevention, nutrition and feed of aquatic organisms, fishery ecology and environmental protection, development and conservation of marine fishery resources, fishing tools and methods, preservation and comprehensive utilization of aquatic products, fishery machinery and instruments.