PARAMETER POPULASI HIU MARTIL (Sphyrna lewini Griffith &amp; Smith, 1834)  DI PERAIRAN SELATAN NUSA TENGGARA

Sentosa, Agus Arifin; Dharmadi, Dharmadi; Tjahjo, Didik Wahju Hendro

doi:10.15578/jppi.22.4.2016.253-262

Cited by 8 publications

(13 citation statements)

References 15 publications

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“…Populasi hiu martil diduga telah mengalami penurunan akibat penangkapan dan perdangan secara intensif bahkan ada yang mengekspor terutama pada siripnya (Ferretti et al 2008;Hayes et al, 2009). Hiu martil awalnya merupakan tangkapan sampingan pada perikanan tuna namun pada perikanan artisanal hiu martil menjadi target tangkapan (Fahmi dan Dharmadi 2013;Drew et al 2015;Sentosa 2016). Menurut Galluccci et al (2006); Musick et al (2000) mengatakan bahwa jika dilihat dari siklus hidupnya pertumbuhan hiu martil sangat lambat karena tingkat kematangan kelamin yang lambat serta fekunditasnya yang rendah.…”

Section: Pendahuluanunclassified

“…Frekuensi panjang ikan dihitung mengunakan rumus distribusi frekuensi (Walpole, 1995 : Nilai terbesar dan Nilai terkecil Beberapa parameter lain digunakan untuk mengetahui populasi hiu martil seperti panjang asimptot (L∞) koefesien pertumbuhan (K), mortalitas alami (M) dan laju tangkap (F) serta laju eksploitasi (E). Pendugaan panjang total hiu martil secara bulanan dari bulan Oktober sampai Desember menggunakan perangkat lunak Fish Stock Assessment Tools (FISAT II) (Gayanilo et al, 2005;Sentosa 2016).…”

Section: Waktu Dan Metodeunclassified

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Sebaran Ukuran Dan Pertumbuhan Hiu Martil (By Catch) Yang Didaratkan Di Pangkalan Pendaratan Ikan (Ppi) Ujong Baroh Meulaboh

Alaudin

Jaliadi

Burhanis

2021

JPT

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Hammerhead shark is a type of predator shark belongs to the family of Sphyrnidae. This shark is so aggressive in hunting prey such as fish, squid, and shrimp. The hammerhead shark in Indonesia is included in Appendix II of CITES and has been a special concern in the field of capture fisheries. The aim of the study was to see the size spread, the number of catches, the first size caught, the age growth and the genital ratio of the hammerhead sharks caught with the base fish net. The study was conducted from October to December 2019. The shark measurement was performed once in 2 weeks. Sharks caught by the gills of the base (buttom gilt net) were measured using a roll meter. The collection of hammerhead sharks included total length (TL), number of catches and genital ratio. The analysis was done descriptively using the ELEFAN I existing on Sofwere FiSAT II. The results showed that the hammerhead sharks caught with an gill net of 65 tails from October to December 2019 were taken on the male genital. The total size spread of female malletic sharks were between 61.5-131.5 cm and male hammering sharks between 61.5-111.5 cm. The morphologically spread of the female hammerhead was relatively longer than the male shark. The male hammerhead shark was first captured at a length of 117.9 cm and a female hammerhead shark at a size of 106.2 cm. Hammerhead shark growth by following the curve of von Bertalanffy mallet were male Lt = 138,08 (1-exp (-0.480 (t + 0.0487)) and female mallet shark Lt = 138,08 (1-exp (-0.430 (t + 0.0434)). Such equations can be known by using the relationship curve model between the age and length of fish.

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Section: Pendahuluanunclassified

Section: Waktu Dan Metodeunclassified

Sebaran Ukuran Dan Pertumbuhan Hiu Martil (By Catch) Yang Didaratkan Di Pangkalan Pendaratan Ikan (Ppi) Ujong Baroh Meulaboh

Alaudin

Jaliadi

Burhanis

2021

JPT

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“…Perbedaan nilai b bisa jadi disebabkan oleh habitat yang berbeda dan jumlah sampel yang digunakan dalam analisis hubungan panjang berat. Informasi terkait hubungan panjangberat sangat penting untuk menduga berat hiu dalam rangka pendugaan biomassanya jika hanya tersedia data panjangnya (Effendie, 2002 (Sentosa et al, 2016;Sentosa dan Hedianto, 2017;Sentosa, 2017). Kondisi tersebut bisa jadi terkait hiu betina lebih rentan tertangkap dengan rawai dibandingkan hiu jantan walaupun juga dipengaruhi oleh beberapa faktor seperti daerah dan metode penangkapan, serta fenomena oseanografi (Sentosa et al, 2016).…”

Section: Analisis Dataunclassified

NISHAH KELAMIN, HUBUNGAN PANJANG-BERAT DAN UKURAN REPRODUKSI HIU Hexanchus spp. DI PERAIRAN SELATAN NUSA TENGGARA

Sentosa

2019

BERITABIOLOGI

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Hexanchus spp. are shark species that are often caught in the Indian Ocean southern Nusa Tenggara and its status is Near Threatened, but the information is still relatively limited. This study aimed to sex ratio, length-weight relationship and reproductive size of sixgill shark, Hexanchus spp. caught from southern Nusa Tenggara waters. This study had been carried out during 2016 at the Fishing Port of Tanjung Luar, East Lombok, West Nusa Tenggara. Shark data collection was done by measuring the length, weight, maturity and fishing data. Data were analyzed by formula of sex ratio, length-weight relationship, length at first maturity (Lm) and length at first catch (Lc). The results showed that Hexanchus spp. caught in the southern Nusa Tenggara waters consisted of H. nakamurai (81.82%) and H. griseus (18.18%). The sex ratio of both sharks was dominated by the female. The average of the total length of H. griseus (218.3 ± 96.08 cm). It was longer than H. nakamurai (127.6 ± 30.35 cm). The length-weight relationship of H. griseus was formulated as W = 0.0195 LT 2,6344 (R² = 0,9265) and H. nakamurai with the formula W = 0.002 LT 3,1098 (R² = 0.902). Both species have the size of Lm was bigger than the size of Lc which indicated to their population vulnerability.

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“…In Benoa and Cilacap, sharks are one of the bycatches of tuna longline fisheries that targeting tuna catches [2,3]. While in Tanjung Luar, sharks are one of the main catches for traditional fishermen which using set longline and drifting longline [3,4].…”

Section: Introductionmentioning

confidence: 99%

Biological and population parameters of Tiger Shark Galeocerdo cuvier, landed in Tanjung Luar, West Nusa Tenggara

Jatmiko¹,

Nugroho²

2020

E3S Web Conf.

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Tiger shark is one of the important catch for small scale fisheries in West Nusa Tenggara. It is considered nearly threatened according the IUCN, thus information regarding to its estimated population is needed for conservative efforts. This study aimed to estimate the biological and population parameters of the tiger shark in Indonesia. Length data were collected from March to December 2018 in Tanjung Luar Port, West Nusa Tenggara. The length-weight relationship was calculated using equation W=aL b . Electronic length-frequency analysis (ELEFAN) in R Statistics with package "TropFishR" was used to estimate the population parameter. Length converted catch curve (LCCC) analysis was used to estimate the total mortality of the species. The results showed the length-weight relationship for combined sex, male and female was similar to the equation W=0.000001L 3.15 . The growth pattern for this species was positive allometric which means that the growth of weight is faster than its length. Total mortality was estimated at 0.33/yr, with natural and fishing mortality of 0.16/yr and 0.17/yr, respectively. The results from this study should be able to provide the basic information to support fisheries management of tiger sharks in Indonesia.

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PARAMETER POPULASI HIU MARTIL (Sphyrna lewini Griffith & Smith, 1834) DI PERAIRAN SELATAN NUSA TENGGARA

Cited by 8 publications

References 15 publications

Sebaran Ukuran Dan Pertumbuhan Hiu Martil (By Catch) Yang Didaratkan Di Pangkalan Pendaratan Ikan (Ppi) Ujong Baroh Meulaboh

Sebaran Ukuran Dan Pertumbuhan Hiu Martil (By Catch) Yang Didaratkan Di Pangkalan Pendaratan Ikan (Ppi) Ujong Baroh Meulaboh

NISHAH KELAMIN, HUBUNGAN PANJANG-BERAT DAN UKURAN REPRODUKSI HIU Hexanchus spp. DI PERAIRAN SELATAN NUSA TENGGARA

Biological and population parameters of Tiger Shark Galeocerdo cuvier, landed in Tanjung Luar, West Nusa Tenggara

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