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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 14 Documents
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Search results for , issue "Vol 11, No 1 (2009)" : 14 Documents clear
SEXUAL DEVELOPMENT OF THE TROPICAL SHORT-FINNED EEL Anguilla bicolor bicolor OF THE SEGARA ANAKAN WATERS, CENTRAL JAVA, INDONESIA Hagi Y. Sugeha; Irwan Jatmiko; Sahri Muhammad
Jurnal Perikanan Universitas Gadjah Mada Vol 11, No 1 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.108 KB) | DOI: 10.22146/jfs.2988

Abstract

A total of 289 specimens of tropical short-finned ell (Anguilla bicolor bicolor) was collected from Segara Anakan in May, September, October and November 2004. Basic biological information including body weight (BW) and total length (TL), gonad morphology, gonad somatic index (GSI) and eye index (EI) among collecting specimens were examined in order to understand their sexual development. It was found that Anguilla bicolor bicolor from Segara Anakan were greatly varied in body weight (10-900 g) and total length (19-78 cm), suggested their occurred in different like stages (young to adult ell). Based on gonad morphology it was found that sexual development of the species could be separated into four groups namely: female (17.6%), male (48.1%), intersex (32.2%) and developed (2.1%). GSI were 0-3 in female, 1-9 in male, 0-4 in intersex and 2-7 in undeveloped. EI were 3-10 in female, 1-7 in male, 2-8 in intersex and 1-4 in undeveloped. Positive relationship was found between EI and BW and TL of the species in each sexual development, but no correlation between GSI and BW and TL, except for female. Different from temperate eels that bigger in GSI and EI, suggested earlier sexual maturation in the tropical in the temperate.
PENGARUH EKOSISTEM HUTAN MANGROVE TERHADAP PRODUKSI PERIKANAN TANGKAP (STUDI KASUS DI KABUPATEN PASURUAN, JAWA TIMUR) Nuddin Harahab
Jurnal Perikanan Universitas Gadjah Mada Vol 11, No 1 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (131.845 KB) | DOI: 10.22146/jfs.2989

Abstract

Coastal reasorces as mangrove has high supporting effort as water organisms life. The existence of mangrove will give beneficial effect for fish catching productivity in their area. The aims of this research were to obtain informations of fish catching development, and correlation between mangrove ecosystem and fish catching productivity. This reasearch were used descriptive method based on regression and correlation analysis. Any kinds of data that were used in this research were primary data on observation and interview, also secondary data of fish catching productivity and mangrove area from Marine and Fisheries Department, Forestry, and Body of Environmental Management, Pasuruan. The result showed that fish catching productivity in Pasuruan over 15 year period has a slight increase or almost at level off. Then, it showed that mangrove area has significant effect and closely related with shrimps and shells productivity.
FOOD HABITS OF THE YELLOW RASBORA, Rasbora lateristriata, (FAMILY: CYPRINIDAE) BROODFISH DURING MOVING TO SPAWNING GROUND Djumanto Djumanto; F. Setyawan
Jurnal Perikanan Universitas Gadjah Mada Vol 11, No 1 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (504.188 KB) | DOI: 10.22146/jfs.3027

Abstract

The purpose of this research was to clarify the food habits of yellow rasbora (Rasbora Iateristiata) when moving into spawning site during spawning season. Specimens of yellow rasbora were collected between July and August, 2007 from spawning site surveys during spawning season in their natural environment which run yearly from April to August. There were 628 individual fish collected from spawning ground, and 30 of them were selected to analyze the gut content. Samples were preserved in alcohol solvent until identified their gut content in laboratory.The results showed that yellow rasbora broodfish fed plankton continuously both in the day and night while moving into the spawning site. Percent Index of Relative Importance values indicated the most important prey items of yellow rasbora were phytoplankton (68.43%), and then zooplankton (29.79%), leaf cut (0.02%), little caterpillar (0.01%), insect larva (0.15%), and unidentified items (1.60%), respectively. Chrysophyta and protozoa was found the most dominant of phytoplankton and zooplankton in the gut content, respectively. Based to the ratio between gut length and total length, and the feeding mode, R. lareritriata is categorized to an omnivorous feeder.
POLA SEBARAN HORIZONTAL DAN KERAPATAN PLANKTON Di PERAIRAN BAWEAN Djumanto Djumanto; Tumpak Sidabutar; Hanny Pontororing; Reinhard Leipary
Jurnal Perikanan Universitas Gadjah Mada Vol 11, No 1 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1174.22 KB) | DOI: 10.22146/jfs.3028

Abstract

The objectives of this research were to find out the horizontal distribution patterns, the density and species dominancy of plankton in Bawean waters, Gresik regency. Sampling was done using RV Baruna Jaya VIII on 29-30 April 2009. There were 12 stations for sampling, which arranged latitude 3 stations to the north and longitude 4 stations to the east with the distance of 8 and 12 miles, respectively. Water samples were collected using Kitahara net for phytoplankton and Norpac net for zooplankton by filtering from bottom to surface. The density of plankton for each station was measured base on their biovolume bases, namely settlement for phytoplankton whereas water replacement for zooplankton. Genus of plankton was identified for each station.The results showed that the highest density of phytoplankton was found in the northern part and was decreased towards the south, while the highest zooplankton was found in the middle area. The density of phytoplankton was distributed homogeneously, while zooplankton was distributed randomly. The density of biomass phytoplankton ranged from 0.294-3.985 ml/rn3 and an average wasl.598 ml/m3. The density of biomass zooplankton ranged from 0.05-0.24 ml/m3, and an average was 0.122 ml/m3. The ratio of biovolume between phytoplankton and zooplankton ranged from 3:1-31:1 with an average was 13:1. The individual density of phytoplankton ranged from 15,843 - 1,755,694 individual/m3, while zooplankton was between 861-29,362 individual/m3. In the phytoplankton was found as much as 34 genus, and there were 5 genus which their populations were abundantly, namely Caetoceros, Skeletonema, Rizosolenia, Pleurosigma and bacteriostratum with percentage of 25,34%, 24,45%, 13,84%, 10,68% and 8,10%, respectively. The biology index of phytoplankton, namely diversity (H) ranged from 1.11-2.22, uniformities (E) ranged from 0.50- 1.00, and dominancy (D) ranged from 0.16 - 0.50. in the zooplankton was found 65 genus, and there were 5 genus of their populations was abundantly, that was Ceratium, Calanus, Cetocerelia, Agalma and Fritillaria with percentage 22.26%, 17.10%, 6.96%, 6.92% and 5.21%, respectively. The diversity index of zooplankton ranged from 1.83 - 2.56, uniformities ranged from 0.791.00, and dominancy ranged from 0.12-0.23. The population forming of phytoplankton and zooplankton were very assorted and dynamic.

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