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All Journal BULETIN OSEANOGRAFI MARINA Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan
Alaudin, Alaudin
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Energy Engineering Transportation

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Success Rate Of Hatching Of Green Turtle Eggs ( Chelonia Mydas) On Bangkaru Island, Banyak Island, Aceh Singkil Alaudin, Alaudin; Burhanis, Burhanis; Okasari, Rafika; Bahri , Samsul; Kamba, Ria
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 6, Number 1, March 2025 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.v6i1.42766

Abstract

Turtles are biota that are included in the protected animal category because they have a high level of threat of extinction due to natural and anthropogenic factors. Turtles spend their time in the open sea and go ashore to lay their eggs each season. The successful hatching of turtle eggs is important as an effort to increase their population. This research aims to see the success rate of hatching of green turtle (Chelonia Mydas) eggs on Bangkaru Island, Banyak Island, Aceh Singkil. This research was carried out from March to June 2024. The research was carried out by observing at the green turtle nesting beach the number of nests, number of eggs, nest meters, percentage of hatched eggs. The method used in this research is a survey (direct observation). In the results of research that has been carried out, the highest percentage of turtle eggs is found in the 6th nest with a percentage of 48%, while the lowest percentage is found in nests 1, 2 and 4 with a percentage of 0%. The high percentage in the 6th nest is estimated because of the location. nest that is suitable for the nest, because the nest is directly exposed to the sun and is far from the ebb and flow of sea water which results in the nest being damp and the temperature of the nest remaining stable, the low hatching rate in nests 1, 2, and 4 is because the nest is close to the nest. The ebb and flow of sea water causes the nest to be flooded with sea water and the nest is not exposed to enough sunlight, which causes the eggs to rot in the nest.
Pola Pertumbuhan Dan Mortalitas Tuna Sirip Kuning (Thunnus albacares) di PPI Ujong Baroh Burhanis, Burhanis; Alaudin, Alaudin; Fadhillah, Radhi; Zulfadhli, Zulfadhli; Edwarsyah, Edwarsyah; Munandar, Roni Arif
Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i2.58680

Abstract

Beberapa spesies ikan tuna mulai terancam ketersediaannya. Upaya untuk mewujudkan pemanfaatan yang optimal dan berkelanjutan sangat dibutuhkan, sehingga perlu dilakukan monitoring, evaluasi dan perbandingan terhadap pemanfaatan tuna sirip kuning. Tujuan penelitian untuk mengkaji dan meganalisis pola pertumbuhan dan mortalitas tuna sirip kuning di PPI Ujong Baroh. Penelitian menggunakan metode deskriptif dengan pendekatan kuantitatif. Pengamatan dan pengukuran sampel tuna sirip kuning dilakukan secara langsung dari hasil tangkapan nelayan. Selanjutnya pengumpulan data tuna sirip kuning meliputi jumlah hasil tangkapan serta pengukuran karakter morfometrik yaitu panjang cagak (FL). Hasil penelitian menunjukkan koefision ukuran panjang maksimum (L∞) yaitu sebesar 97,65 cm, dengan pendugaan panjang tuna sirip kuning pertama kali tertangkap (LC) pada ukuran panjang cagak (FL) 56,43 cm.  Nilai laju pertumbuhan (K) sebesar 0,80 pertahun, laju mortalitas total (Z) sebesar 0,26 pertahun, mortalitas alami (M) sebesar 0,76 pertahun, mortalitas penangkapan (F) sebesar -0,50 pertahun. Rata-rata ikan tuna sirip kuning yang tertangkap berukuran kecil dan belum matang gonad (Lc<Lm) dengan tingkat pertumbuhan lebih cepat serta kematian alami lebih besar dari pada penangkapan. Kegiatan penangkapan tuna sirip kuning yang di daratkan di PPI Ujong Baroh merupakan perikanan skala kecil dengan nilai eksploitasi (E) sebesar -1,94 pertahun yang tegolong under fishing berdasarkan dari nilai M (F<M).  Several species of tuna fish are starting to face threats to their availability. Efforts to achieve optimal and sustainable utilization are crucial, requiring monitoring, evaluation, and comparison of the utilization of yellowfin tuna. The research aim is to examine and analyze the growth and mortality patterns of yellowfin tuna in Ujong Baroh Fish Landing Base (PPI). The method in this research uses a descriptive method with a quantitative approach. The observation and measurement of yellowfin tuna samples are directly conducted from the fishermen's catch. Data collection of yellowfin tuna includes the quantity of catches and measurements of morphometric characteristics, specifically fork length (FL). The research results show that the maximum length coefficient (L∞) is 97,65 cm, with an estimated length at first capture at a fork length (FL) of 56,43 cm. The value of growth rate (K) of 0,80 per year, total mortality rate (Z) of 0,26 per year, natural mortality (M) of 0,76 per year, fishing mortality (F) is -0,50 per year. On average, the yellowfin tuna caught are small and immature gonads (Lc<Lm) with a faster growth rate and greater natural mortality than those caught in the fishery. The fishing activity of yellowfin tuna landed at PPI Ujong Baroh are small-scale fishery with an exploitation value (E) of -1.94 per year which is classified as under fishing based on the M value (F<M).
Co-Authors Bahri , Samsul Burhanis, Burhanis Edwarsyah Edwarsyah, Edwarsyah Kamba, Ria Munandar, Roni Arif Okasari, Rafika Zulfadhli Zulfadhli