PENGELOLAAN PERIKANAN TONGKOL LISONG (Auxis rochei) DI KAWASAN KONSERVASI PERAIRAN NUSA PENIDA, BALI

Yuliana, Ernik; Nurhasanah, Nurhasanah; Yani, Diarsi Eka; Agustina, Siska

doi:10.29244/jitkt.v12i3.32195

Cited by 5 publications

(6 citation statements)

References 16 publications

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“…This is one of the causes of pressure on bullet tuna population because it disrupts its recruitment process in nature [26]. Indications of fishing pressure were also found in Nusa Penida Bali (exploitation rate E > 0.5) [3], in the Banda Sea against bullet tuna with an exploitation rate above 0,5 [8] and in the Karimunjawa National Park conservation area with an exploitation rate value of 0,5 [27].…”

Section: Length At First Capture (Lc = L50%)mentioning

confidence: 93%

“…The total catch of fish resources for 2001-2015, neritic tuna showed an estimated potential of 586.128 tons in WPP 573 [1]. The large potential for neritic tuna has the risk of unsustainable fishing pressure and leads to a level of utilization that reaches highly exploited as predicted in the western waters of Sumatra [2] and around the island of Nusa Penida, Bali [3] so that strict monitoring is required to achieve sustainable fisheries management. For this reason, research has been carried out on the length at first maturity (Lm50) and length at first capture (Lc=Lc50%) of bullet tuna in southern Bali waters (WPP 573) to provide basic data and information that can be useful as input for its management.…”

Section: Introductionmentioning

confidence: 99%

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Length at first maturity and length at first capture for bullet tuna (Auxis rochei Risso, 1810) in the southern waters of Bali

Pramulati,

Hartaty,

Sukmaningsih

et al. 2023

BIO Web Conf.

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Bullet tuna (Auxis rochei Risso, 1810) is one of the neritic tuna species which has the second largest number of catches after small pelagic fish. The high potential for neritic tuna has a risk of continuous fishing pressure. This study presents mainly two biological indicators, the length at first capture (Lc=L50%) and the length at first maturity (Lm50) of bullet tuna, based on the biological data collected from the southern waters of Bali from June to November 2021. Parameters and characteristics of biological aspects are expected to be useful in policies in determining the optimum catch size, restrictions on fishing effort and determining the optimum of mesh size to be used in commercial fishing. Biological sampling was conducted at Fish Landing Base Kedonganan Bali from the catches of the neritic gillnet. A total of 151 female fish and 95 male fish were studied. Fresh gonad samples were fixed and analyzed histologically by a paraffin method and Harris-Haematoxylin and Eosin staining. The results showed that the length at first capture (Lc=L50% = 20,1 cm) was significantly lower than the length at first maturity (Lm50 = 22,76 cm); this was indicating that the young fish (the immature and never spawn) were dominant in the catch and would lead to an overfishing status. It is recommended that the fishing efforts and gear selectivity of bullet tuna with neritic gillnets must better manage for the sustainability of the fish resources.

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Section: Length At First Capture (Lc = L50%)mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Length at first maturity and length at first capture for bullet tuna (Auxis rochei Risso, 1810) in the southern waters of Bali

Pramulati,

Hartaty,

Sukmaningsih

et al. 2023

BIO Web Conf.

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“…Setelah melakukan pendekatan dengan metode membandingkan spesies sample yang diperoleh di perairan Lombok Barat dengan spesies ikan tongkol lainnya berdasarkan morfologi karakter. Ciriciri tongkol lisong yang didapatkan di perairan Lombok Barat memiliki panjang sekitar 20 cm, tubuh berbentuk silinder, memanjang dengan warna hitam kebiruan pada bagian atas tubuhnya, serta motif garis hitam pada punggungnya, bagian bawahnya memliki warna silver keputihan, karakteristik Ikan tersebut sesuai dengan ciri-ciri Ikan Tongkol Lisong yang ditemukan di perairan Nusa Penida, Bali, dengan ukuran rata-rata 24 cm (Yuliana et al, 2020). Diketahui spesies tongkol ini dinamakan Auxis rochei, ikan tongkol ini banyak ditemukan diperairan permukaan hingga 200m dibawah laut yang masih didekat sekitar pantai.…”

Section: Hasil Dan Pembahasan Morfologi Karakter Ikan Tongkolunclassified

Molecular and Phylogenetic Character Analysis of Tuna (Auxis rochei) Based on the CO1 Gene in the Waters of West Lombok

Darmawan,

H. Mahrus,

Syamsul Bahri

et al. 2024

JBT

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Tuna Fish is a type of tuna with a medium body size and fair wide distribution in Indo-Pacific waters. The number of Tuna Fish species that have morphological similarities can cause misidentification. This study aims to determine the genetic and phylogenetic diversity between variations of Tuna Fish species in the West Lombok Waters. This research is an exploratory study with the object of research being a dataset of ingroup sequences of tuna and outgroup sequences from the same family. The amplification of fish samples used DNA primers targeting the CO1 gene, which resulted in a sequence length of approximately 650 bp. Sequence data were analyzed using MEGA XI software known from phylogenetic tree analysis shows that Tuna Fish from the waters of the West Lombok are closely related to Tuna Fish from the South China Sea and have a genetic distance of less than 3%.

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“…The bullet tuna is a fish resource that is epipelagic, neritic, and oceanic in warm waters such as Indonesia [8]. In Indonesia, the bullet tuna is distributed in the Indian Ocean waters west of Sumatra [9], Makassar Strait [10][11][12], Indian Ocean south of Java, Bali, and Nusa Tenggara [13][14][15][16], Bone Bay [17] and Banda Sea [18]. The bullet tuna is usually caught with fishing gear such as gillnet, hand line, troll line, lift net, purse seine and seine net [9], [19].…”

Section: Introductionmentioning

confidence: 99%

Biological aspects of bullet tuna (Auxis rochei Risso, 1810) landed in Towo’e Market Tahuna Indonesia

Budi,

Chodrijah,

Umi

et al. 2023

BIO Web Conf.

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The bullet tuna (Auxis rochei Risso 1810) is one of the species of neritic tuna that lives in tropical and subtropical coastal waters. Research on the biological aspects of the bullet tuna in Indonesian waters is very important considering the limited information on this species. The purpose of this study is to analyze size structure, length-weight relationship, sex ratio, length at first maturity and length at first capture. A total of 1353 bullet tuna was randomly collected during February-November 2017 at Towo’e Market Tahuna North Sulawesi. The study was conducted by observation and enumeration. The results showed that the bullet tuna landed in Towo’e Market had a length ranging from 19-29 cmFL with an average size of 23.34 cmFL. The LW relationship indicates a positive allometric condition. The sex ratio of male and female bullet tuna showed an unbalanced condition with the ratio of females and males being 1: 0.97. Lm was 22.82 cmFL and Lc was 23.32 cmFL. This condition indicates that most of the bullet tuna caught are already spawning, so caution is needed in their utilization because it can prevent the recruitment pattern of the bullet tuna.

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PENGELOLAAN PERIKANAN TONGKOL LISONG (Auxis rochei) DI KAWASAN KONSERVASI PERAIRAN NUSA PENIDA, BALI

Cited by 5 publications

References 16 publications

Length at first maturity and length at first capture for bullet tuna (Auxis rochei Risso, 1810) in the southern waters of Bali

Length at first maturity and length at first capture for bullet tuna (Auxis rochei Risso, 1810) in the southern waters of Bali

Molecular and Phylogenetic Character Analysis of Tuna (Auxis rochei) Based on the CO1 Gene in the Waters of West Lombok

Biological aspects of bullet tuna (Auxis rochei Risso, 1810) landed in Towo’e Market Tahuna Indonesia

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