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All Journal Jurnal Akuakultur Indonesia Jurnal Penelitian Pertanian Terapan Acta Aquatica: Aquatic Sciences Journal Jurnal Biologi Tropis Jurnal Laut Khatulistiwa Aquasains : Jurnal Ilmu Perikanan dan Sumberdaya Perairan e-Jurnal Rekayasa dan Teknologi Budidaya Perairan
Herman Yulianto
Jurusan Budidaya Perairan Fakultas Pertanian Unila
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Energy Immunology & microbiology Materials Science & Nanotechnology Physics Other

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Journal : Acta Aquatica: Aquatic Sciences Journal

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Population characteristic of torpedo scad (Megalaspis cordyla Linnaeus, 1758) in the Lampung Bay: Size structure, growth type, and condition factor Julian, David; Caesario, Rachmad; Kartini, Nidya; Yudha, Indra Gumay; Delis, Putu Cinthia; Hasani, Qadar; Yulianto, Herman
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 11: No. 2 (August, 2024)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v11i2.14735

Abstract

Megalaspis cordyla, locally known as ikan bekre, stands as a crucial economic species commonly consumed by the people of Lampung. The escalating demand for this fish has significant implications for increased fishing activities, potentially impacting its population. This research aimed to explore the biological characteristics of M. cordyla landed at the Lempasing Fishing Port, Bandar Lampung, providing fundamental insights for fisheries resource management in the waters of Lampung Bay. Using a quantitative descriptive method, the sampled fish has been analyzed to get size structure, growth type, and fish condition factors based on length and weight data collected from M. cordyla landed weekly. Between April and June 2022, a total of 300 samples were collected, with length ranging from 230 to 430 mm TL, with the largest count (77 individuals) in the 314-334 mm interval. M. cordyla has an allometric negative growth pattern in Lampung Bay, with a growth coefficient (b) value of 2.47. Fish condition factor values ranged from 0.71 to 1.33, with June having the highest average value of 1.03. This information contributes greatly to a better understanding and long-term planning for the management of this fish population.Keywords: Allometric; Condition Factor; Length-Weight Relationship; Pelagic Fish; Aquatic Resources Management
Phytoplankton community structure as a bioindicator of water quality in Lake Ranau, Lumbok Seminung District, West Lampung Regency, Lampung Province Syahfitri, Amanda Trya; Kartini, Nidya; Yulianto, Herman
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 2 (August, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i2.18966

Abstract

The presence of phytoplankton greatly affects aquatic life because it plays an important role for aquatic biota. The purpose of this study was to identify the structure of the phytoplankton community, determine the condition of the waters and analyze the relationship between the structure of the phytoplankton community and the physical and chemical factors of the waters of Lake Ranau, Lumbok Seminung District, West Lampung. This study was conducted in November 2023 - January 2024. The determination of the research station used the purposive sampling method. Phytoplankton samples were taken using a 60 micron plankton net. Analysis of the effect of physical and chemical parameters of water on phytoplankton abundance was analyzed using PCA using statistical software. The results showed that the phytoplankton found consisted of 5 classes, namely Bacillariophyceae, Cyanophyceae, Chlorophyceae, Euglenophyceae, and Zgynematophyceae. The saprobic coefficient value of phytoplankton ranged from 0.2 - 0.7. This shows that the condition of the waters in Lake Ranau, Lumbok Seminung Regency is in a state of mild to moderate pollution. Environmental parameters that are positively correlated with phytoplankton abundance are DO, brightness, current velocity, and N/P ratio. Environmental parameters that are negatively correlated are temperature and parameters that do not affect phytoplankton abundance are H2S and pH.  Keywords: Lake Ranau; Phytoplankton; Saprobic
Co-Authors Abdullah Aman Damai Agus Hartoko Caesario, Rachmad David Julian Delis, Putu Chintia Delis, Putu Cinthia Deny Sapto Chondro Utomo Dwi Mulyasih Esti Harpeni Farida, Eka Nur Febriani, Sefia Indra Gumay Yudha Julian, David KARTINI, Nidya Muhammad Reza Penmau, Defrilasio Eldes Putriani, Rizha Bery Qadar Hasani Rahmasari, Ayu Randy, Dwi Saka Rara Diantari rochman agustrina, rochman Sumardi . Suparmono Suparmono Susanti, Oktora Sutrisno Anggoro Syahfitri, Amanda Trya Trias, Silke Wardiyanto Wardiyanto, Wardiyanto wayan hernawati, wayan Yuliana, Darma Yuliana, Darma Yusup, Maulid Wahid