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INDONESIA
Jurnal Perikanan Universitas Gadjah Mada
Published by Universitas Gadjah Mada
ISSN : 08536384     EISSN : 25025066     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Jurnal Perikanan Universitas Gadjah Mada are published to promote a critical review of the various investigative issues of interest in the field of fisheries between the researchers, academics, students and the general public, as a medium for communication, dissemination, and utilization of wider scientific activities.
Arjuna Subject : -
Articles 460 Documents
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Reproductive Biodynamics of Short Mackerel (Rastreliger brachyoma Bleeker, 1851) in the Northern Waters Makassar Strait, Indonesia Wayan Kantun; Ardi Eko Mulyawan; Hadijah Mahyuddin
Jurnal Perikanan Universitas Gadjah Mada Vol 24, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.72728

Abstract

Short mackerel are caught with high intensity by the fisherman and using various fishing gear.  It is feared that this activity could change the reproduction habits of short mackerel in ther habitat. This study aims to analyze the bio-dynamics reproduction of short mackerel, including sex ratio, maturity stage, length at first maturity, length at first spawning, and fecundity. The survey method obtained the sample collection from the fish landing sites. Samples were collected in 1320 samples consisting of 651 females (13.0-16.5 cm) and 669 males (13.3-17.4 cm). The results showed that the sex ratio was balanced (1.00:1.02), the stage of gonad maturity showed from immature gonad to spawning (I to V), and the highest gonad maturity index for males and females were found in July (1.609 and 1.794). The length at first maturity of males and females had occurred when they were 16.51 cm and 16.63 cm, and the length at first spawning for males and females was 17.12 cm and 17.03 cm in size. The fecundity of female mackerel ranges from 30.106 to 58.439 in the northern waters of Makassar Strait. Capturing fish is suggested with a length above the spawned fish (>17 cm), considering that the fish only spawn at least once from their life cycle. The fecundity of short mackerel is relatively high as an indicator of high reproductive potential.
Reef Fish Species Diversity Using Environmental DNA Metabarcoding in Mansinam and Lemon Island Waters, Manokwari Regency Bayu Pranata; Aradea Bujana Kusuma; Muhamad Ilham Azhar
Jurnal Perikanan Universitas Gadjah Mada Vol 24, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.73037

Abstract

Biodiversity has an essential role in the stability of an ecosystem. A high level of biodiversity indicates a more stable and stable ecosystem. The decline in the quality of ecosystems such as coral reefs, seagrass beds, and mangrove forests due to anthropogenic factors and global warming threaten biodiversity. This study aims to determine the diversity of reef fish species using an environmental DNA (eDNA) approach in the waters of the Mansinam and Lemon, Manokwari Regency islands. The analysis results detected 158 individual fish comprising 26 species from 10 families (sequence identity 97-100%). The highest species abundance was found in the Pomacentridae Family. The Pomacentridae family is an ornamental fish species in coral reef ecosystems. In addition, several species from the families Serranidae, Caesionidae, Mullidae, Holocentridae, Balistidae, Scaridae, and Labridae were also detected; fish species from these families are catch targets for fishers with economic value. Assessment of fish species diversity using the Shannon-Wiener method. The diversity of fish species in the waters of the islands of Mansinam and Lemon is in the high category, namely 3.17. High diversity indicates a stable and stable ecosystem condition.
Osteocranium of the Sailfish (Istiophorus platypterus, Shaw & Nodder, 1792) from Malacca Strait Yusrizal Akmal; Mujibul Rahman; Muliari Muliari; Agung Setia Batubara
Jurnal Perikanan Universitas Gadjah Mada Vol 24, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.73573

Abstract

The features and morphometrics of the sailfish's osteocranium are examined in this study (Istiophorus platypterus, Shaw & Nodder, 1792). I. platypterus has a total weight of ±20 kg with a total length of ±218 cm. The stages of the research process included preparing samples, preparing osteocraniums, documenting photos, editing images, and identifying terminology related to osteocraniums. The Laboratory of Mathematics and Natural Sciences at Almuslim University handled every aspect of the research. The osteocranium preparation process was carried out physically and chemically. Each bone was documented using a camera and edited using Adobe Photoshop CS6. The neurocranium is divided into four components: the olfactory (ethmoidal), which comprises 6 bones. The orbitale comprises 4 bones, the otic comprises 5, and the occipital comprises 4 bones. The branchiocranium is divided into five components: the oromandibular structure consisting of 3 bones, the mandibular arc (suspensorium) composed of 4 bones, the opercular apparatus consisting of 4 bones, and the hyoid arc composed of 6 bones, and the branchial arc composed of 4 bones.
Some Aspects of the Reproductive of Japanese Threadfin Bream (Nemipterus japonicus Bloch, 1791) Caught in the Area Around the Artificial Reef In the Pitu Sunggu Waters of the Makassar Strait Wayan Kantun; Wilma Moka
Jurnal Perikanan Universitas Gadjah Mada Vol 24, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.73629

Abstract

Japanese Threadfin Bream is a demersal fish commonly found around artificial reefs. Food availability in the artificial reef ecosystem is essential for the sustainability of this species. Hence, this research aimed to determine several aspects of bio-reproduction of Japanese Threadfin Bream caught in the artificial reef (bioreeftek). Samples were taken using handline fishing, twice a month (April-July 2020) in Pitu Sunggu Waters, Makassar Strait. The samples were observed for its reproduction aspects.  The result showed that the Japanese Threadfin Bream fish caught have a balanced sex ratio between males and females, 1:1.03. The analysis of the gonad maturity stage obtained was II-IV, and the gonado somatic index ranged from 0.541-0.940 for males and 1.156-2.358 for females. The first mature Japanese Threadfin Bream size was 18.29 cm for males and 16.99 cm for females. The Japanese Threadfin Bream fish fecundity ranged between 35.042-42.061 eggs.
The Ratio of Storage Volume to Cubic Number for Rampus Nets at The Karangantu Archipelago Fishery Port-Banten Annisa Ramadhanti; Yopi Novita; Mohammad Imron; Tri Nanda Citra Bangun; Budhi Hascaryo Iskandar
Jurnal Perikanan Universitas Gadjah Mada Vol 24, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.73658

Abstract

The Banten Province Maritime Affairs and Fisheries Service plans to standardize the hold volume for fishing vessels in its management area. The management plan is still challenging to implement because there is no information about the vessel storage volume. In addition, small fishing vessel fishers still store their catch in boxes made of fibre-reinforced plastic (FRP). That box is often placed on the deck floor, causing decreased vessel stability. The size of the available storage volume on the vessel must be ideal, so it needs to be compared with the cubic number. This research aims to determine the optimal storage volume to cubic number ratio for rampus net vessels with the best stability conditions. The sampling technique used was accidental sampling with a total sample of 10% from 72 fishing vessels. Data processing used mathematical calculations and stability simulation with the GZ program. Analysis of the data used is descriptive analysis. The results showed that the optimal ratio of storage volume to cubic number for vessels with sizes 3-5 GT ranged from 5.03 - 8.55%. That ratio was a storage condition designed inside the hull construction, and the catch is directly put into the store without using the FRP box. From the stability point of view, condition 3 is the best for the quality of fishing vessel’s stability. This due to the lowest value of KG in condition 3 comparing to other conditions.
Effect of Peat Water Mix with Borehole Water on Mortality of African Catfish Ardianor Ardianor; Tutwuri Handayani; Noor Syarifuddin Yusuf; Rosana Elvince
Jurnal Perikanan Universitas Gadjah Mada Vol 24, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.73848

Abstract

Generally, cultured fish are suitable in media with a pH of around 7, like mountainous river and borehole water.  However, peat water is known with low pH.  It is not suitable for fish culture, especially for fingerlings.  This study was conducted to examine the survival of African catfish fingerling (Clarias gariepinus) in the mixture of peat and borehole water with different pHs. Survival test of African catfish as subject applied bioassay method, LC50-96 hours.  Peat water as the agent was arranged for 11 concentration levels of 0% - 100% with no replication and placed in plastic basins with 20 liters each. Catfish fingerlings were used for subject fish (size 10-15 cm) and 10 individuals in each basin. Water quality, mortality, and behavior of fish were observed. Results showed that the survival ability of African catfish on peat water, the LC50-96 hours was 63.8%, with 95% CI between 53.3% and 76.4% in concentration. Behavioral response of fish fingerling exposed to peat water ≥ 40% in the beginning 2 hours was frequently swimming up to surface.  Lethal responses fingerlings were frequently taking up oxygen to the water surface, horizontally swimming, and moving vertically before death.  After death, the fish ran out of mucus, and the skin looked peeling and bruising.
Influence of In-stream Ecosystem Restoration Techniques on the Fish Ecology of the River Nabongo in Eastern Uganda Remigio Turyahabwe; Muhamud Wambedde Nabalegwa; Joyfred Asaba; Andrew Mulabbi
Jurnal Perikanan Universitas Gadjah Mada Vol 24, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.73889

Abstract

The study was the first in Uganda to assess the responses of fish community assemblages to introduced woody debris structures in a tropical river in Eastern Uganda. For comparison purposes, two different woody debris structures (simple and complex) were introduced in river Nabongo, and their effect on fish assemblage and feeding was established based on experiments conducted in two heterogeneous stream environments (a pool and a riffle). Results showed that sampling plots treated with restoration structures registered higher fish species richness, diversity, and abundance than sampling plots without restoration structures (control plots) at each site. The study (experiment) applied a stratified sampling design which used purposive identification of a pool and a riffle in River Nabongo Catchment. Fish were captured using a drift net, an electro-fishing gear, and a hand net. Data were analysed using a one-way ANOVA generated from STATA version 14. At the pool site, total fish density varied significantly from plot to plot (P<0.05) but was highest in the complex structures with 64±1.08 fishes/m2 and lowest with 24±0.82 fishes/m2 in untreated plots. K-factor did not vary significantly in untreated plots at the pool site but significantly differed from treated plots at P<0.05. The relative abundance of fish species at the pool site was highest in the complex structures with 40.7±0.66% and 21.5±0.42% before structures but was least in the control plot, varying significantly from plot to plot at P<0.05. It was concluded that woody debris restoration is an effective stream restoration technique. Fish individuals, trophic groups, and taxa more densely colonised sampling plots that had structures than those that did not have structures.
Quality Characteristics of Smoked Barracuda Fish (Sphyraena jello) Processed with Different Concentrations of Corncob Liquid Smoke Fronthea Swastawati; Ulfa Nur Wahidah; Romadhon Romadhon
Jurnal Perikanan Universitas Gadjah Mada Vol 24, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.74660

Abstract

Smoking with liquid smoke is one of the alternative processing methods with lower temperatures and is expected to reduce protein and amino acid damage. This study aimed to determine the effect of different concentrations of corncob liquid smoke on the quality of both chemical and sensory of smoked barracuda fish. The method used was smoking barracuda fish with four different concentrations of corncob liquid smoke, namely 0%, 2.5%, 5%, and 7.5% at a temperature of 40-50°C (1 hour), 50-60°C (1 hour), and 70-80°C (2 hours). The main parameter observed was amino acid profile, and supporting parameters were protein, water, phenol content, and organoleptic. The results show that amino acids in barracuda fish increased with increasing concentration of liquid smoke. The highest amino acid was generated by a 7.5% concentration of corncob liquid smoke with an essential amino acid value of lysine 22,035.56 mg/kg. Meanwhile, the highest non-essential amino acid was glutamic acid with a value of 36,868.31 mg/kg. The immediate concentration of 7.5% overall gave the best results with water content 48.11 ± 1.94%, protein content 25.43 ± 0.05%, phenol content 0.188 ± 0.00%, and organoleptic with a confidence interval of 8.367<μ<88.666.
Pokdakan Mino Ngremboko's Business Recovery Strategy: Resilience Analysis and Supply Chain Integration Sylvano Akbariansyah Cahyacipta; Jangkung Handoyo Mulyo; Any Suryantini
Jurnal Perikanan Universitas Gadjah Mada Vol 25, No 1 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.74983

Abstract

Mino Ngremboko Fish Cultivator Group (or Pokdakan Mino Ngremboko) is the pioneer of fish cultivation, which has been developing rapidly since its establishment in April 1987 until now (the beginning of 2021). Corona Virus Disease (Covid-19) pandemic has been attacking Indonesia violently (since March 2, 2020), disrupting the supply chain of the fish cultivation business. The negative impact is a decline in revenue significantly. Mino Ngremboko Cultivator, for instance, has been affected by the pandemic with an average revenue (demand) loss of 50-70 percent. In addition, business resilience becomes very crucial which comprises business continuity that represents the ability of businesses to rapidly adapt and respond to the pandemic crisis (EIB, IBRD, 2022). The objective of the study is to assess the resilience and supply chain integration of the Mino Ngremboko Cultivator in facing the Covid-19 pandemic and beyond. Method this study uses the inductive-qualitative approach through a case study of Mino Ngremboko Cultivator. Data was collected through unstructured interviews and observation from November  2020 to March  2021. The study results provide three constructive insights, especially for managing Mino Ngremboko Cultivator and Fish Cultivator Group in general for sustaining their businesses. (1) Supply chain resilience is relatively good, which was shown by the average of productivity 1,10 from March 2019 to March 2021; (2) supply chain integration of fish cultivation business was not optimally implemented yet, and (3) Pokdakan Mino Ngremboko's business recovery strategy to optimise the practices of supply chain integration based on the digital marketing as well as downstream and commercialisation the output of fish cultivation. These recovery strategies require the support of improving organisation capability and stakeholder alignment to contribute to sustainable development (benefits for the social and ecological environment) in 2022 and beyond.
The Effect of Maggot and Silkworm on the Growth and Intestinal Histological Structure of Wader Pari Fish (Rasbora lateristriata Bleeker, 1854) Devi Anisa Suci; Bambang Retnoaji
Jurnal Perikanan Universitas Gadjah Mada Vol 25, No 1 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.75496

Abstract

Wader pari is one of the fish that is often found in Indonesian waters. One of the problems regarding fish farming is the problem of feed. This study aims to determine the effect of alternative feeding on the growth and histological structure of the Wader pari fish's intestine. The paraffin method was used in constructing intestinal histological preparations by Haematoxylin-Eosin (HE) and Periodic Acid Schiff-Alcian Blue (PAS-AB) staining. Observations were done using the DMRT test on various ANOVA, and the histological structure of the intestine was analyzed descriptively and quantitatively. The treatments used in this study were P1 (commercial feed), P2 (maggot feed), and P3 (mixed feed between maggot and silkworms). The study's results indicated that the higher the protein consumed by the Wader pari fish, the higher the growth. The three treatments that affected the growth of Wader pari sequentially are mixed feed, maggot feed, and commercial feed. The histological structure of the wader pari intestine is composed of tunica mucosa, tunica submucosa, tunica muscularis, and tunica serosa. Maggot and mixed feed can affect the histological structure of the Wader pari intestine compared to commercial feed. This can be seen in the results of the length of the villi and the distribution of the number of goblet cells.

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