Impact of climate variability on skipjack tuna (Katsuwonus pelamis) catches in the Indonesian Fisheries Management Area (FMA) 715

Penelitian ini bertujuan untuk mengkaji parameter populasi ikan cakalang (Katsuwonus pelamis) yang tertangkap pukat cincin di WPP-572 Samudra Hindia Barat Sumatera dan WPP-573 Selatan Jawa. Hasil penelitian ini diharapkan dapat digunakan sebagai masukan dalam penentuan pengelolaan perikanan sehingga stok ikan cakalang dapat dimanfaatkan secara berkelanjutan. Ikan contoh dikumpulkan melalui program enumerasi tahun 2016 (Januari-Desember). Sampling acak dilaksanakan di empat pelabuhan, yaitu PPS Lampulo (Aceh), PPN Sibolga (Sumatra Utara), PPP Tamperan (Pacitan) dan IPP Pondokdadap (Malang). Jumlah ikan contoh diperoleh sebanyak 14.894 ekor. Serial data fekuensi panjang bulanan diolah menggunakan program FiSAT II untuk menduga parameter pertumbuhan, mortalitas dan tingkat eksploitasi. Hasil penelitian menunjukkan ikan cakalang yang tertangkap di WPP-572 memiliki panjang asimtotik (L)73,5 cmFL, K sebesar 0.22/tahun dan to sebesar -0,59 tahun. Parameter populasi di WPP-573 berturut-turut L”=67,20 cmFL, K=0,27/tahun, dan to=-0,50 tahun. Nilai mortalitas alami (M) ikan cakalang di WPP 572 sebesar 0,49/tahun, mortalitas total (Z) 0,70/tahun, dan kematian akibat penangkapan (F) adalah 0,21/tahun. Ikan cakalang yang tertangkap di WPP 573 menunjukkan nilai (E) sebesar 0,59/tahun, nilai Z 1,02/tahun, dan nilai F sebesar 0,43/tahun. Dugaan tingkat eksploitasi ikan cakalang di WPP 572 dan 573 masing-masing 0,3/tahun dan 0,42/tahun atau belum berada pada tahap optimal.This study aimed to assess the population parameters of skipjack tuna (Katsuwonus pelamis) that caught by purse seine in the Indonesian FMA (Fisheries Management Area) 572 Indian Ocean West Sumatera and FMA 573 South Java. The outcomes of this research can hopefully be used as inputs for fisheries management, in order the stock of skipjack tuna can be utilized sustainably. Fish sample were collected through the program enumeration of Research Institute for Tuna Fisheries (RITF) during the year 2016 (Januari-Desember). Using random sampling method at four fishing ports, namely PPS Lampulo (Aceh), PPN Sibolga (North Sumatra), PPP Tamperan (Pacitan), and IPP Pondokdadap (Malang). The total number of fish samples was 14.894 fish. Monthly length frequency data processed using FiSAT II program to estimate the growth parameters, mortality, and exploitation. The analysis results showed that skipjack tuna caught in FMA 572 has asymtotic length value (L) at 73.5 cmFL, K value 0.22/year, and to at -0.59 year; while in FMA 573 population parameters values respectively 67.20 cmFL, 0.27/year, and -0.50 year. The value of natural mortality (M) skipjack in FMA 572 is 0.49/year, total mortality (Z) 0.70/year, and fishing mortality (F) 0.21/year. Skipjack tuna that caught in FMA 573 showed value of M 0.59/year, Z value 1.02/year, and F value 0.43/year. The estimated values of exploitation levels of skipjack in FMA 572 and 573 were 0.3/year and 0.42/year respectively.

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Genetic Diversity and Demography of Skipjack Tuna (Katsuwonus pelamis) In Southern and Western Part of Indonesian Waters

ILMU KELAUTAN Indonesian Journal of Marine Sciences ◽

10.14710/ik.ijms.24.2.61-68 ◽

2019 ◽

Vol 24 (2) ◽

pp. 61

Author(s):

Irwan Jatmiko ◽

Raymon Rahmanov Zedta ◽

Maya Agustina ◽

Bram Setyadji

Keyword(s):

Genetic Diversity ◽

Fisheries Management ◽

Pcr Amplification ◽

Skipjack Tuna ◽

Migratory Species ◽

Katsuwonus Pelamis ◽

Tissue Samples ◽

Management Area ◽

Polymerase Chain ◽

Group 2

Skipjack tuna (Katsuwonus pelamis) is highly migratory species that spread from trophic and sub trophic waters. This species can be found in Atlantic, Indian and Pacific oceans. The genetic information of highly migratory species like skipjack tuna is important to support the sustainability of the fisheries. The objectives of this study are to gain information genetic diversity and population structure of exploited species and to understand the population kinship in Indonesian waters. Tissue samples were collected from six locations, i.e.: Sibolga (North Sumatera), Padang (West Sumatera), Binuangeun (Banten), Pacitan (East Java), Lombok (West Nusa Tenggara) and Kupang (East Nusa Tenggara). Microsatellite analysis was done in this study consisting of extraction, purification, polymerase chain reaction (PCR) amplification and electrophoresis. Three loci used for the analysis i.e.: UTD 172, UTD 523 and UTD 535. The results showed that there are two groups from six locations i.e.: group 1: Sibolga and Padang; group 2: Binuangeun, Pacitan Lombok and Kupang. The variance among these two groups is 0.066 with variance 5.441%. This finding in line with Indonesian Fisheries Management Area of 572 (west of Sumatera waters) and 573 (south of Java waters). However, as highly migratory species across nations, the management strategy for skipjack tuna needs collaboration among countries through regional fisheries management authority like Indian Ocean Tuna Commission (IOTC).

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Skipjack Tuna Fishing Ground Based on Oceanography Satellite Image Data in Fisheries Management Area (FMA) 713

TORANI: Journal of Fisheries and Marine Science ◽

10.35911/torani.v3i2.11368 ◽

2020 ◽

pp. 51-60

Author(s):

. Safruddin ◽

Rachmat Hidayat ◽

Mukti Zainuddin

Keyword(s):

Chlorophyll A ◽

Fisheries Management ◽

Satellite Image ◽

Image Data ◽

Sea Surface ◽

Fishing Ground ◽

Skipjack Tuna ◽

Management Area ◽

Tuna Fishing ◽

Satellite Image Data

This study aimed to map the oceanographic conditions and, based on that, to determine the favorable condition of skipjack tuna fishing ground in Fisheries Management Area (FMA) 713. This condition includes sea surface temperature (SST) and chlorophyll-a concentration. The primary data, such as fishing ground position and fish catch per trip, was collected by following the fishing operations that utilized pole and line (in Bone Gulf and Flores Sea) and purse seine fishing operations (in Makassar Strait). The secondary data, such as SST and chlorophyll-a, was derived from oceanographic satellite image data. The result showed that from January to August 2019, the skipjack tuna tends to occupy off shore areas where the sea surface temperature is between 29 - 29.5 oC and the chlorophyll-a density is between 0.10 to 0.15 mg.m3.

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Pemanfaatan Data Biologi Ikan Cakalang (Katsuwonus pelamis) dalam Rangka Pengelolaan Perikanan Bertanggung Jawab di Perairan Teluk Bone

Jurnal Natur Indonesia ◽

10.31258/jnat.14.1.107-113 ◽

2012 ◽

Vol 14 (1) ◽

pp. 107 ◽

Cited By ~ 3

Author(s):

Muhammad Jamal ◽

Muhammad Fedi Alfiadi Sondita ◽

John Haluan ◽

Budy Wiryawan

Keyword(s):

Growth Model ◽

Fisheries Management ◽

Growth Pattern ◽

Fork Length ◽

Biological Characteristics ◽

Skipjack Tuna ◽

Katsuwonus Pelamis ◽

Management Zone ◽

Weight Relationship ◽

First Maturity

The Bone Bay is part of Fisheries Management Zone WPPI 713 that covers Makassar strait, Flores sea and Bali sea. To such vast marinearea, fisheries management can be started from smaller region, e.g. embayment waters. Biological characteristics of skipjack tuna (Katsuwonuspelamis) are some of important information for developing fisheries management in the area. This research was aimed to determine length-weight relationship, size composititon, growth pattern and biologically feasible size of the fish. Data were obtained from fish caught byfisherman from Januari to December 2007. The bay was divided into three study areas, i.e. Northern, Centre and Southern Zones. The bcoefficients for length-weight relationship in the three zones were equal 3 [not significant]. The average fork-length (FL) in each zoneshowed similar trends: increased from January to June, then stabilized until December. Using von Bertalanffy’s growth model, the maximumFL (L ∞ of 759.75 mm is estimated for fish at age of 84 months. The length at first maturity of the fish is 465 mm (FL).

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Keragaman Genetik Ikan Cakalang (Katsuwonus pelamis) di Perairan Laut Maluku Utara

DEPIK ◽

10.13170/depik.7.2.11156 ◽

2018 ◽

Vol 7 (2) ◽

pp. 164-176

Author(s):

Nebuchad Nezzar Akbar ◽

Rusmawati Labenua

Keyword(s):

Genetic Diversity ◽

Fisheries Management ◽

Negative Impact ◽

Genetic Data ◽

Molecular Characteristics ◽

Skipjack Tuna ◽

Migratory Species ◽

Sustainable Fisheries ◽

Katsuwonus Pelamis ◽

The North

Skipjack tuna is a migratory species that migrate globally throughout the ocean. The North Maluku Sea has a big potency on skipjack, this resource has been exploited intensively and gave the negative impact on skipjack population. The genetic data is one of the important information to strategy a better sustainable fisheries management. Hence, the aims of the study were to analyze the genetic diversity data in North Maluku Sea. The samples were collected from three locations, namely Morotai Island, South Halamera and Bacan. A total of 10 samples were collected from every location. The samples were extracted with Chelex 10%, and processing for PCR and sequencing. The results showed that molecular characteristics in skipjack are 546 (bp). The genetic diversity was ranged from 0.800-1.000 with the total of 28 haplotypes of 30 samples. The genetic diversity is included in high/undisturbed criteria and showed the population still in stable condition.Ikan Cakalang merupakan migratori spesies yang bermigrasi secara global di seluruh samudera. Potensi ikan cakalang sangat tinggi di perairan laut Maluku Utara. Pemanfaatan sumberdaya ikan cakalang sudah dilakukan lama dan terus menurus sehingga berdampak pada penurunan, oleh karena itu perlu segera dilakukan pengelolaan secara berkelanjutan. Data genetik merupakan salah satu informasi penting untuk menyusun rencana pengelolaannya di perairan laut Maluku Utara. Oleh karena itu penelitian ini bertujuan untuk melakukan analisis keragamana genetik ikan cakalang di perairan Maluku Utara. Sampel ikan diperoleh dari tiga lokasi, yaitu Pulau Moratai, Halamera Selatan dan Bacan, masing-masing lokasi dengan 10 sampel. Hasil penelitian diperoleh karakteristik molekuler pada ikan cakalang 546 (bp). Keragaman genetik ditemukan berkisar 0.800-1.000 dengan jumlah 28 jaringan haplotipe dari 30 sampel. Nilai keragaman genetik masuk dalam kriteria tinggi/baik, sehingga bisa dikatakan bahwa populasi ikan masih dalam kondisi stabil.

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STATUS KEBERLANJUTAN KETERSEDIAAN SUMBERDAYA PERIKANAN CAKALANG (Katsuwonus pelamis) DI PERAIRAN ACEH BARAT

JURNAL PERIKANAN TROPIS ◽

10.35308/jpt.v2i2.23 ◽

2015 ◽

Vol 2 (2) ◽

Author(s):

Edwarsyah Edwarsyah ◽

Mohamad Gazali

Keyword(s):

Multidimensional Scaling ◽

Fisheries Management ◽

Local Community ◽

Skipjack Tuna ◽

Katsuwonus Pelamis ◽

Sustainability Index ◽

Fisheries Resources ◽

Fishing Gears ◽

The Status ◽

Index Value

Fisheries production in West of Aceh was still insufficient to provide the local community consumption. However, fisheries resources in West of Aceh water are abundant. But utilization of fisheries particularly skipjack tuna (cakalang) hasn’t been yet optimalized. This aiming to analyse the status of sustainablity of skipjack (Katsuwonus pelamis) fisheries in West of Aceh water. The study was conducted in November to Desember 2012 at the Fish Landing Port of Kuala Bubon and Fish Landing Bases (PPI) Ujong Baroh. The result shown that sustainability index value by using multidimensional scaling is 88,42 with stress value is 0.12 and coefisien of determination (R2) is 0,95 or 95%. Such index value show that sustainablity of skipjack resources were good status. It means that multidimensional of skipjack stock were still paid attention in fisheries management sustainable. Beside that, it shown from water condition and fishing gears were still support viability of such comodity.

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Komposisi dan distribusi hasil tangkapan kapal pukat cincin KM Grasia 04 di perairan Laut Maluku (Composition and distribution catch of Grasia 04 purse seiner in Molucca Sea waters)

JURNAL ILMU DAN TEKNOLOGI PERIKANAN TANGKAP ◽

10.35800/jitpt.2.5.2017.15942 ◽

2017 ◽

Vol 2 (5) ◽

Author(s):

Sugianto Talakana ◽

Lefrrand Manoppo ◽

Lusia Manu

Keyword(s):

Data Collection ◽

Fisheries Management ◽

Pelagic Fish ◽

Yellowfin Tuna ◽

Purse Seine ◽

Katsuwonus Pelamis ◽

Management Area ◽

Auxis Thazard ◽

The Republic ◽

Immature Fish

Purse seine is considered to be the most productive fising gear to catch pelagic fish, so there are many purse seiners that based in Bitung Oceanic Fishing Port operate in Fisheries Management Area of the Republic of Indonesia (WPP) 715 Moluccas Sea. There was and issue that the catches of purse seiner around FADs was classified as immature fish. Therefore, necessary to study the diversity and distribution of purse seiner catches in the area. The data collection was done by direct observation and active participation in the field and deep interviews with the crews of Grasia 04 purse seiner. At each hauling, twenty fish from each species were taken randomly measured their fork lengths. Catches during the study consisted of six species; namely skipjack (Katsuwonus pelamis), yellow fin tuna (Thunnus albacores), little tuna (Auxis thazard), scad mackerel (Decapteru smacarellus), rainbow runner (Elagatis bipinnulata), oceanic trigger fish (Canthidermis maculata) and trevally (Selaroides leptolepis). The dominatcatch in each hauling were skipjack, yellowfin, tuna and scad mackerel. Results were showed that most of the catches of Grasia 04 purse seinerin the waters of Moluccas Sea not legal size.Keywords: Composition and distribution catch, purse seiner Grasia 04, Molucca Sea. ABSTRAKAlat tangkap purse seine dianggap paling produktif untuk menangkap ikan pelagis, sehingga banyak kapal purse seine yang berpangkalan di Pelabuhan Perikanan Samudera Bitung beroperasi di Wilayah Pengelolaan Perikanan RI (WPP) 715 Laut Maluku. Beberapa issue menyebutkan bahwa hasil tangkapan purse seine terutama di sekitar rumpon tergolong ikan-ikan yang belum dewasa. Oleh karena itu, perlu mempelajari keragaman dan distribusi hasil tangkapan purse seine di wilaya tersebut. Pengumpulam data dilakukan dengan cara pengamatan langsung dan partisifasi aktif dilapangan, wawancara dengan anak buah kapal KM Grasia 04. Pada setiap kali hauling, diambil secara acak 20 ekor ikan sampel setiap jenis dan mengukur panjang bakunya. Hasil tangkapan selama penelitian adalah 6 jenis ikan; yaitu ikan cakalang (Katsuwonuspelamis), madidihang (Thunnusalbacores), tongkol (Auxis thazard), malalugis (Decapterus macarellus), sunglir (Elagatis bipinnulata), tato batang (Canthidermis maculata) dan selar (Selaroides leptolepis).Tetapi hasil tangkapan yang dominan pada setiap hauling adalah cakalang, madidihang, tongkol dan malalugis. Hasil analisis menunjukan bahwa sebagian besar hasil tangkapan kapal purse seine Grasia 04 di perairan Laut Maluku belum layak tangkap.Kata kunci: Komposisi dan distribusi tangkapan, pukat cincin KM Grasia 04, Laut Maluku

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