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All Journal Jurnal Perikanan Akuatik Tropis: Journal of Tropical Aquatic Resource Management
Munir, Ahmad Mulyadi Sirodjul
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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FEEDING HABITS AND GONAD MATURITY LEVELS OF MACKEREL (Scomberomorus commerson) LANDED AT THE RENGAS RIVER COASTAL FISHING PORT Stefani, Karyn Irene Teresa; Munir, Ahmad Mulyadi Sirodjul; Anzani, Yunita Magrima
Jurnal Perikanan Unram Vol 15 No 1 (2025): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v15i1.1416

Abstract

Coastal Fishing Port (PPP) is a landing place for fish caught by fishermen, including pelagic fish. The production of mackerel catches in the Rengas River PPP has decreased from 2012 to 2021. Due to the decline in mackerel fish catch production, research related to the reproduction of mackerel is needed. The aim of this research is to analyze eating habits, TKG, IKG, and IHS. The fish sampling method was carried out using the purposive sampling method. Sampling of 20 mackerel fish is carried out once a month. Mackerel fish are carnivorous fish, which can be seen from the type of mackerel mouth, namely terminal, the shape of the mackerel fish's teeth, which are canine-like, and the fish's gill filter, which is large and has few filaments. The average length of a mackerel fish's intestines is 0.59 cm of its body length, so it is classified as a carnivorous fish. The level of maturity of male gonads was highest in TKG IV and female gonads in TKG II, the average IKG of male gonads was 0.96%, and female gonads 1.13%. The liver of female mackerel fish (Scomberomorus commerson) experiences changes in weight as measured by the Hepatosomatic Index along with increasing egg growth based on TKG.
Morphometric and Meristic Study of Freshwater Shrimp (Macrobrachium spp.) in the Ulu Ngarak River, Landak Regency Listia, M Windi; Munir, Ahmad Mulyadi Sirodjul
Akuatik Tropis: Journal of Tropical Aquatic Resource Management Vol 3, No 1 (2025): Jurnal Akuatik Tropis
Publisher : Department of Aquatic Resource Management, Faculty of Agriculture, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/akuatik tropis.v3i1.91281

Abstract

The Ulu Ngarak River is one of the rivers located in Ngarak Village, Mandor District, Landak Regency. The riverbed consists of muddy, slightly sandy, and large rocky substrates, with depths ranging from 30 cm to 120 cm. The presence of various freshwater shrimp species in a river can serve as an indicator of water quality and contribute to improving the environmental conditions of the aquatic ecosystem. This study aims to identify the freshwater shrimp species found in the Ulu Ngarak River, Landak Regency, based on their morphometric and meristic characteristics and to analyze the river's environmental conditions. The research employed a purposive sampling method with three sampling stations. Morphometric identification was conducted by measuring different body parts of the shrimp, while meristic characteristics were analyzed based on the countable features of their body structures. The study identified a total of 462 freshwater shrimp individuals (Macrobrachium spp.), consisting of four species: Macrobrachium malayanum, Macrobrachium sintangense, Macrobrachium lar, and Macrobrachium lanchesteri. Morphometric analysis revealed variations in body size among species, while meristic analysis showed differences in telson spine count, body weight, number of dorsal and ventral teeth, and the number of walking and swimming legs. Environmental parameter analysis indicated that temperature, pH, dissolved oxygen, and water current velocity were within a range that supports the survival of freshwater shrimp. This study provides essential baseline information that can be utilized for the management and conservation of freshwater shrimp populations in the Ulu Ngarak River.
Co-Authors Anzani, Yunita Magrima Listia, M Windi Stefani, Karyn Irene Teresa