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All Journal Grouper: Jurnal Ilmiah Perikanan Journal of Marine Studies
Amran, Ramzi H.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Environmental Science Immunology & microbiology Veterinary

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Advances in understanding physical and biological controls on eggs and larval distribution in Pacific fisheries: A review Sumon, Md Afsar Ahmed; Hartono, Sugeng; Amran, Ramzi H.; Santanumurti, Muhammad Browijoyo; Khan, Saadullah Jan; Akther, Sajia; Gabr, Mohamed Hosny; Linh, Nguyen Vu; Doan, Hien Van
Journal of Marine Studies Volume 1, Issue 3 (November, 2024)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/joms.v1i3.18627

Abstract

The early stages of fish, comprising eggs and larvae, are exceptionally fragile and sensitive to environmental dynamics and climate change. Pacific Ocean (PO) currents play an important role in shaping the distribution of marine organisms, influencing global climate patterns, heat distribution, coastal temperatures, and nutrient redistribution. These currents reveal significant changes within the climate system. Their variability across different timescales can be attributed to the complex interplay of physical forces. These currents are subjected to diverse anthropogenic factors, exerting detrimental effects on the dispersal of fish larvae. Furthermore, climate change variables, including alterations in tropical PO temperature associated with the ENSO cycle, Atlantic Nino modes influencing equatorial Atlantic temperature, changes in ocean salinity, polar ice cap melting, increasing greenhouse gases, marine heatwaves, and fluctuations in subsurface flows, directly impact the distribution, abundance, and species composition of early life stages. Major Pacific fisheries, such as those targeting Pacific sardines, saury, and anchovies, undergo population booms and declines due to significant alterations in the current dynamics of currents and fronts within the PO. The anticipated intensification of the ENSO cycle, characterized by more frequent and severe El Niño (warm) and La Niña (cold) events as a result of climate change, is expected to significantly impact the early developmental stages of important commercial fish stocks regularly. This review synthesizes the current understanding of the physical and biological parameters driving changes in ocean currents and their implications for early fish dispersion, emphasizing the critical need for research in this area to inform global conservation efforts, fisheries management, and food security.
Hatchery Performance of Nilem (Osteochilus hasselti) at Technical Implementation Unit of Fish Health and Environmental Laboratory (UPT LKIL), Pasuruan, East Java Santanumurti, Muhammad Browijoyo; Zahira, Azza Fazania; Isrofi, Syahrul; Hamzah, Mochamad Sahroni; Yahya, Muhammad; Amran, Ramzi H.
Grouper Vol. 17 No. 1 (2026): Grouper: Jurnal Ilmiah Perikanan
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/grouper.v17i1.404

Abstract

Nilem fish (Osteochilus hasselti) is a freshwater fish commodity with enormous potential for the aquaculture sector. In aquaculture activities, fish hatchery is one of the crucial aspects. To date, the performance of nilem fish hatchery activities at the UPT LKIL has not been reported. This study was conducted to understand techniques for hatching Nilem fish using a semi-artificial system at the UPT LKIL Pasuruan, East Java. This study was conducted over 60 days at the UPT LKIL Pasuruan, East Java (Figure 1). The method used during this study was descriptive. The results showed that the hatchery activity at UPT LKIL Pasuruan, East Java showed 94% fertilized eggs, a 91% hatch rate, and an 88% survival rate. It can be concluded that the hatchery of Nilem fish at UPT LKIL Pasuruan showed good performance. These great results were supported by the use of ovaprim, good dissolved oxygen content, and fine protein feed. Although the temperature and pH were higher, UPT LKIL conducted water changes to neutralize them. UPT LKIL should prepare an indoor pond to prevent sunlight penetration so that the temperature and pH are not high.
Co-Authors Akther, Sajia Doan, Hien Van Gabr, Mohamed Hosny Hamzah, Mochamad Sahroni Isrofi, Syahrul Khan, Saadullah Jan Linh, Nguyen Vu Muhammad Yahya Santanumurti, Muhammad Browijoyo Sugeng Hartono Sumon, Md Afsar Ahmed Zahira, Azza Fazania