ANALISIS PERTUMBUHAN DAN LAJU EKSPLOITASI IKAN TONGKOL ABU-ABU, Thunnus tonggol (Bleeker, 1851) DI PERAIRAN LAUT JAWA

Bawal Widya Riset Perikanan Tangkap Pub Date : 2018-10-08 DOI:10.15578/BAWAL.10.2.2018.95-104

Yoke Hany Restiangsih, Thomas Hidayat

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引用次数: 7

Abstract

Tongkol abu-abu atau longtail tuna (Thunnus tonggol) salah satu jenis ikan tuna neritik sebagai target penangkapan armada pukat cincin, jaring isang, dan pancing di Laut Jawa. Penelitian ini bertujuan untuk mengetahui parameter pertumbuhan, umur dan mortalitas ikan tongkol abu-abu untuk penyusunan strategi pengelolaannya. Pengumpulan data frekuensi panjang dan bobot ikan dilakukan di Pelabuhan Perikanan Nusantara (PPN) Pekalongan pada Januari – Nopember 2014. Hasil penelitian menunjukkan hubungan panjang-bobot ikan tongkol abu-abu bersifat isometrik dan indek kecepatan pertumbuhan 3,46/tahun. Ikan dapat tumbuh hingga mencapai panjang asimtotik (L) = 85 cm dengan laju pertumbuhan (K) sebesar 0,4/tahun. Umur teoritis pada saat panjang ikan sama dengan nol (t0) adalah 0,046 tahun. Umur maksimal diduga 15 tahun. Mortalitas alami (M) sebesar 0,61/tahun, mortalitas karena penangkapan (F) 1,01/tahun, mortalitas total (Z) 1,62/tahun. Tingkat eksploitasi (E) sebesar 0,59 berarti bahwa pemanfaatan ikan tongkol abu-abu di Laut Jawa cenderung sudah penuh (fully exploited).Longtail tuna as one of neritic tuna species are commonly caught by purse seine, gill net and hand line in java sea.. This research activity aims to determine population parameters i.e. growth, mortality and its exploitation rate that can contribute to strengthen database on preparation its harvest strategy. The Collecting of length and weight data were conducted at Pekalongan fishing port during period of January to November 2014. The Long-weigth relationship was isometric and growth performance index was 3.46/year. The asymptotic length rate (L) was 85 cmFL, growth rate (K) was 0.4/year and zero age (t0) was 0.046 year. This length is reached allegedly at the 15 years age. Natural mortality (M) was 0.6/year, fishing mortality (F) was 1.01/year, total mortality (Z) was 1.62/yera. The exploitation rate (E) was 0.59, it means exploitation of longtail tuna in the Java Sea tend to highly exploited.

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金枪鱼是一种金枪鱼，是拖网渔船、鱼网和渔获在爪哇海的目标。本研究旨在确定灰鲭鱼在战略管理方面的增长、年龄和死亡率参数。2014年1月至11月，日本北加良渔港收集了鱼类的长频率和重量数据。研究表明，灰鲭鱼的失重程度是等距的，缺乏3.46年/年的生长速度。鱼可以长到酸碱长度(L) = 85厘米，生长速度为0.4 /年。鱼在理论上的长度等于0的年龄是0 046岁。最高年龄:15岁。自然死亡率为0.61 /年，逮捕死亡率为1.01 /年，总死亡率为1.62 /年。剥削率(E)为0.59，表示爪哇海的灰鲭鱼的用途往往被充分利用。长尾金枪鱼就像神经性金枪鱼一样，通常会被java sea的purse、gill net和hand line所吸引。这一研究旨在确定人口流动、死亡率和它的爆炸率，这些能力可以与建立其收获策略的数据库相匹配。2014年1月至11月期间，在港口钓鱼时，数据收集被指定。长weigth关系是等距的，增长表现指数是3。46年。asytotic length是85 cmFL, growth rate (K)是0.4/年零年代(t0)，是046年。这个长度在15年的时间里完全显现出来。自然死亡率是0.6年，钓鱼死亡率是1.01/年，总死亡率是1.62/yera。爆炸率为0.59，这意味着在Java Sea中对长尾鱼的攻击是非常高的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Bawal Widya Riset Perikanan Tangkap

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12 weeks