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Anthon Andrimida
Department of Fisheries and Marine Affairs Jawa Timur

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Species Composition and Community Structure of Small Pelagic Fish Landed at Pondokdadap Coastal Fishing Port, East Jawa - Indonesia Satria Gemilang; Husain Latuconsina; Hamdani Dwi Prasetyo; Anthon Andrimida
BIOSAINSTEK Vol 8 No 1 (2026): Jurnal BIOSAINSTEK
Publisher : UNIVERSITAS MUHAMMADIYAH MALUKU UTARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52046/biosainstek.v8i1.2704

Abstract

Management of small pelagic fish resources for sustainable use requires scientific information related to exploited fish resources, related to species composition, and community structure, including conservation status. This study aims to analyze the species composition, frequency of occurrence, community structure, and conservation status of small pelagic fish caught by fishermen. This study was conducted in April - May 2025 at the Fish Auction Place and Fishermen's Fish Market at Pondokdadap Beach Fishing Port, Sendangbiru, Malang Regency, East Java. The method used was direct observation with species identification and analysis of species composition, frequency of occurrence, and community structure. The results showed that the small pelagic fish group consisted of six species with a total of 5,332 individuals, dominated by Rastrelliger brachysoma and Decapterus macarellus, with the highest composition and frequency of occurrence. The community structure of small pelagic fish includes Diversity and Dominance indices which are in the low category with values of 1.20 and 0.38, respectively, and the Evenness index which is in the unstable category with a value of 0.67. The species composition and community structure of small pelagic fish fluctuate significantly daily and seasonally, linked to the dynamics of environmental parameters that influence fish biological activity, as well as the complexity of the food chain and fishing pressure. The varying catch sizes of individual small pelagic fish species indicate low gear selectivity. Therefore, regulations governing biologically appropriate fishing practices, supported by further research on reproductive biology and population dynamics, are essential to support sustainable utilization.
Community of Sharks from Fishermen's Bycatch Landed at the Fishermen's Fish Market, Pondokdadap Coastal Fishing Port, Malang - East Jawa Nur Laila Anggraini; Husain Latuconsina; Hamdani Dwi Prasetyo; Anthon Andrimida
BIOSAINSTEK Vol 8 No 1 (2026): Jurnal BIOSAINSTEK
Publisher : UNIVERSITAS MUHAMMADIYAH MALUKU UTARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52046/biosainstek.v8i1.2705

Abstract

Sharks are cartilaginous fish that play an important ecological role in marine ecosystems. However, their existence in the wild is very vulnerable to overfishing and habitat degradation. This study aims to identify species and analyze the structure of shark communities as bycatch of fishermen. This study was conducted from April to June 2025 at the Fishermen's Fish Market, Pondokdadap Beach Fishing Port Area, Sendangbiru, Malang, East Java, through observation of morphological characters and interviews as supporting data. Data analysis is descriptive in the form of Tables and Graphs. The results of fish identification include 17 individuals from 3 species representing 2 families from 2 orders, namely Chiloscyllium griseum, Squalus montalbani, and Squalus hemipinnis. All individuals caught are categorized as having entered the adult phase, so they are biologically suitable for capture. The diversity index (H') value is in the low category, the evenness index (E) is in the stressed category, and the dominance index (C) is in the high category. The low number of shark catches landed is due to the publicity of the shark trade ban by the Pondokdadap Coastal Fishing Port authorities and strict sanctions against violators. Despite this, some shark landings are still carried out illegally, reflecting low awareness among fishermen and fish traders, as well as high demand for sharks in the market. Efforts to conserve sharks from overfishing need to be continuously improved through intensive and widespread outreach to various stakeholders to build a shared understanding regarding shark conservation in the wild.