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INDONESIA
Indonesian Fisheries Research Journal
Published by Kementerian Kelautan dan Perikanan RI
ISSN : 08538980     EISSN : 25026569     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Indonesian Fisheries Research Journal published in Indonesia by Center for Fisheries Research. Indonesian Fisheries Research Journal publishes research results on resources, fisheries biology, management, environment related to marine, coastal and inland waters.
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol 27, No 2 (2021): (December) 2021" : 6 Documents clear
TROPHIC INTERACTIONS OF THE FISH COMMUNITIES IN CIRATA RESERVOIR, WEST JAVA Agus Arifin Sentosa; Astri Suryandari; Amula Nurfiarini
Indonesian Fisheries Research Journal Vol 27, No 2 (2021): (December) 2021
Publisher : Research Center for Fisheries

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ifrj.27.2.2021.79-90

Abstract

The utilization of food resources by the fish communities in the Cirata Reservoir depends on the environmental conditions of the reservoir. Eutrophication and the presence of potentially invasive alien fishes could affect the trophic interactions of food utilization by the fish communities in the Cirata reservoir. This study aimed to analyze the trophic interactions of the fish communities in the Cirata Reservoir, West Java. The samplings were conducted in October, December 2018, and April 2019. The fish samples were collected using experimental gill nets with different mesh sizes. The stomach contents were dissected to study their food habits under a stereoscopic microscope. Data analysis was performed using the index of preponderance, niche breadth, trophic level, and index Schoener. A total of 21 species of fishes in the Cirata Reservoir utilized food resources, including phytoplankton, zooplankton, aquatic plants/macrophytes, molluscs, insects (adult and larvae), worms, a body part of fishes and crustaceans, pellets and detritus. The fish communities had a wide range of niche between 0.00-0.32 and trophic levels between 2.00-3.63. The non-native fishes in the Cirata Reservoir had the food overlapping potential with native fishes, from low to high categories, especially from the Cichlidae. Trophic interaction of fish communities in the Cirata reservoir was still relatively stable, characterized by overlapping food niche in the low to medium categories. The fish stock enhancement effort such as fish introduction or restocking in the Cirata Reservoir could still be carried out with a precautionary approach to filling empty niches and avoiding the potential for invasive alien fish species.
MATURITY MEASUREMENT ON BIGEYE SCAD (Selar crumenophthalmus BLOCH 1793) TO INDICATE OVERFISHING Grace Hutubessy
Indonesian Fisheries Research Journal Vol 27, No 2 (2021): (December) 2021
Publisher : Research Center for Fisheries

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ifrj.27.2.2021.99-108

Abstract

Bigeye scad (Selar crumenophthalmus) is one of the small pelagic economical species from the family of Carangidae. The annual landing of Carangids in Ambon Island sharply dropped in 2018. Meanwhile, demand for these fish has increased following the local population growth. Was the reduction of fish products showing an indication of overfishing? To answer this, we measured the maturity of bigeye scad caught in Ambon waters during east monsoon (May to July 2019 and March to June 2020), including the length-frequency distribution. We found that the minimum size was 5 cm, the maximum (Lmax) was 23 cm, and the optimum length (Lopt) was 18.7 cm. The estimated length of first maturity (Lm) of bigeye scad was 18.3 cm. This study showed that the optimum length was slightly longer than maturity length. Less than 30% of the catch of bigeye scad was immature and indicated a small probability of recruitment overfishing. Arround 57% of megaspawner found during this study showed more robust broodstocks to produce survival larvae into the population. The possibility of overfishing is relatively low for the bigeye scad fishery during the east monsoon, except for the reduction in the maturity size should be concerned.
THE ANNUAL CHANGES OF CPT OF TROLL LINE FISHERY IN PALABUHANRATU WEST JAVA, INDONESIA Eflysa Aprilia; Asep Agus Handaka Suryana; Herman Hamdani; Alexander M.A Khan
Indonesian Fisheries Research Journal Vol 27, No 2 (2021): (December) 2021
Publisher : Research Center for Fisheries

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ifrj.27.2.2021.61-67

Abstract

Troll-line is one of the fishing gear, which categorized as a line-fishing with rod. Troll-line fishery in Palabuhanratu heavily depends on the installation of a deep-sea fish aggregating device (FADs). The deployment of FADs as a destined troll-liner’s fishing ground in southern Palabuhanratu, which geographically located at coordinates between 7o to 9o S and 104o to 106o E in the Indian Ocean. The FADs’ coordinates locations have been set in a portable handheld global position system (GPS) by fishers. This study provides new information on troll-liner catch-per-trip (CPT) based on fishers’ monthly data ranged from 2005-2018. The results showed that the highest catches were occurred between September to October every year with maximum catches rates was 1567, 2 kg/trip in February 2006 while the lowest was 174.10 kg/trip in August 2010. The average troll-liner catches from 2005-2018 was 740.33 kg/trip. Based on monthly catch data from 2005-2018, the highest CPT occurred in 2016.
OCCURRENCES OF TROPICAL ANGUILLIDS EELS IDENTIFIED THROUGH DNA BARCODES AT KEDURANG RIVER, SUMATRA ISLAND, INDONESIA Arif Wibowo; Rezki Antony; Samuel Samuel; Anna-Lena Musch; Dwi Atminarso
Indonesian Fisheries Research Journal Vol 27, No 2 (2021): (December) 2021
Publisher : Research Center for Fisheries

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ifrj.27.2.2021.91-98

Abstract

Understanding the geographic distribution of tropical anguillids is important for the conservation of these species. Delimitation of species distribution area is a fundamental task with important implications for the understanding of biodiversity and conservation. However, their geographic ranges are poorly understood, mostly because of the technical difficulties of identifying anguillids by morphological characteristics, especially at the glass eel stage. The current work aims to provide the information on recruitment of tropical anguilid eels in the Kedurang River by using analysis of species identification of an informative DNA segment of Cytochrome Oxidase Sub unit1. Results showed that PCR, sequencing and analysis of an informative DNA can be a useful complement to morphological study for more complete biodiversity assessments. The anguillid eels found in Kedurang River were identified and further validated as A. bicolor bicolor, A. interioris, A. bengalensis bengalensis, and A. marmorata through glass and adult eels. This study suggests the occurrence of A. interioris in Estuary of Sumatera River would provide the first confirmation for this species in the territory. The information can be useful for understanding the geographic distribution this species for the establishment and allocation of risk categories to species, both in national protection lists and in those of treaties and international conventions.
CHARACTERIZING OF SKIPJACK (Katsuwonus pelamis) SUPPLY CHAIN ON POLE AND LINE FISHERY IN INDONESIA FMA 714 AND ADJACENT: A CASE STUDY IN SIKKA REGENCY, WEST NUSA TENGGARA-INDONESIA Agustinus Anung Widodo; Lilis Sadiyah; Fayakun Satria
Indonesian Fisheries Research Journal Vol 27, No 2 (2021): (December) 2021
Publisher : Research Center for Fisheries

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ifrj.27.2.2021.69-78

Abstract

In order to obtain detailed characteristic of skipjack (SKJ) supply chain on pole and line (PL) fishery operates in Indonesia Fisheries Management Area (I-FMA) 714 and its adjacent areas, Center for Fisheries Research (CFR)-MMAF with WCPFC carried out a research in Sikka Regency. Data and infomation obtained through port sampling program, observer program and stakeholders workshop. Result shows that primary actors and processes of supply chain of skipjack on PL fishery based in Sikka consisted of PL fishers (skipper and crews), collector and traders, processors and market. Total active PL boats were 67 which supported by ± 40 lift-net (bagan) to provide 300-400 tonnesnes live bait, 11 small-medium scale and 5 large scale collectors and traders, 5 small and 4 large processors and local, domestik, export market. About 3556.9 tonnes SKJ caught by PL based in Sikka in 2017, about 56% were processed as katsuwobushi (smoke fish) for being exported to Japan, 35 % were frozen processed for being exported and marketed to Europe-US and domestic market in Makassar, Bali, and Surabaya. About 9% of the total catch of PL fishery based in Sikka were locally marketed as cold-fresh SKJ.
GENETIC CHARACTERIZATION OF DWARF SNAKEHEAD, Channa gachua (Hamilton, 1822), FROM TWO POPULATIONS BASED ON 16S rRNA GENE Ragil Pinasti; Warisatul Ilmi; Tuty Ari Suryani
Indonesian Fisheries Research Journal Vol 27, No 2 (2021): (December) 2021
Publisher : Research Center for Fisheries

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ifrj.27.2.2021.109-116

Abstract

Indonesia is one of the countries with high biodiversity of freshwater fishes. One freshwater fish with a wide distribution in Asia with high economic potency for ornamental fish is dwarf snakehead. However, research on genetic characterization of dwarf snakehead from Indonesia is very limited. Therefore, this research aimed to compare genetic characterization of the dwarf snakehead from rice field irrigation at Donomulyo Village (Malang, East Java) and from Keji River (Magelang, Central Java). This study used a PCR method with universal primers: 16Sar and 16Sbr. The data obtained in this study were then analyzed using DNASTAR, BLAST, Mesquite, MEGA, DnaSP, and NETWORK. The results revealed the genetic distance between dwarf snakehead from rice field irrigation at Donomulyo Village and from Keji River was 1.36%. The divergence of GC content, haplotype number, variables sites, haplotype diversity, and nucleotide diversity in both populations exist. The results of this study are expected to arrange 16S mitochondrial DNA Library of dwarf snakehead from Indonesia which is useful for a reference in the conservation and utilization and management of dwarf snakehead in their habitat.

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