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INDONESIA
Indonesian Fisheries Research Journal
ISSN : 08538980     EISSN : 25026569     DOI : -
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
Search results for , issue " Vol 18, No 1 (2012): (June 2012)" : 6 Documents clear
INTERACTION PATTERN BETWEEN FISHERS AND FOREIGN INVESTORS IN THE FISHING BUSINESS AND ITS IMPLICATIONS (A CASE IN NUNUKAN REGENCY, EAST KALIMANTAN) Solihin, Iin; Wisudo, Sugeng Hari; Haluan, John; Martianto, Drajat
Indonesian Fisheries Research Journal Vol 18, No 1 (2012): (June 2012)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (66.876 KB) | DOI: 10.15578/ifrj.18.1.2012.41-46

Abstract

The objective of this research is to determine patterns of interaction between fishers and foreign investors (Malaysia) in the fishing business. Research conducted on May 2009 in the Nunukan, East Kalimantan. The data retrieval was conducted by in depth interviews (deep interviews) with the fishersand middlemen as well as direct observations on the condition of the fishing business and marketing in both the Nunukan District and in Tawau Malaysia. The results showed that there is a relatively large dependence of the fishers in Nunukan District to the owners of capital from Tawau regarding capital provision, marketing of the catch, and social security.
ENVIRONMENTAL CONDITON, FISH RESOURCES AND MANAGEMENT OF MANINJAU LAKE OF WEST SUMATERA Sulastri, Sulastri; Hartoto, Dede Irving; Yuniarti, Ivana
Indonesian Fisheries Research Journal Vol 18, No 1 (2012): (June 2012)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2205.057 KB) | DOI: 10.15578/ifrj.18.1.2012.1-12

Abstract

A blooming of Microcytis aeruginosa occurred in Maninjau Lake in 2000. Mass fish killed happened frequently due to deterioration of water quality in this lake. This study is aimed to observe the current environmental condition, fishery resources status and the state of development process of comanagement regime in Maninjau Lake. Water quality parameter such as temperature, conductivity, turbidity, pH and dissolved oxygen (DO) were measured in situ by using Horiba U-10 water checker. Total nitrogen, ammonia, nitrate, nitrite, total phosphorous, orthophosohate and chlorophyll-a parameter were analyzed using standard method. Phytoplankton was analyzed by Lackey Drop Microtransect. Fish samples were obtained from fishers’ catch. Fisheries data were collected by enumerator, through Focus Group Discussion (FGD), and questioner list methods. Stakeholder analysis was conducted by focus group interview and discussion. In general, water quality parameters were suitable for the life of aquatic organisms except for DO and ammonia. These parameters indicated that the water quality of lake was still undergoing degradation process. Maninjau Lake is rich of nutrient as indicated by abundance of blue green algae. Bada fish (Rasbora argyrotaenia) is an important commodity and the fisheries significantly contributes to local people’ income. Current fisheries problems indicate the urgency of the management and conservation efforts. Several stakeholder groups showed their interest in management. The increment of institutional sustainability concern was reflected by the emergence of local wisdom and the demand for participatory development and management.
FISHING ACTIVITY, SIZE DISTRIBUTION, TAG RELEASED AND RECAPTURE OF TUNA TAGGING IN EASTERN INDONESIAN WATERS Natsir, Moh.; Widodo, Agustinus Anung; Prisantoso, Budi Iskandar
Indonesian Fisheries Research Journal Vol 18, No 1 (2012): (June 2012)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3579.422 KB) | DOI: 10.15578/ifrj.18.1.2012.47-56

Abstract

Tagging of tropical tunas has a long history in Indonesian waters. Since 1987 tuna tagging has been conducted in Indonesian Waters. Tuna tagging in 2008 in eastern Indonesian waters was conducted in collaborative program with SPC to obtain new data about biological aspect and stock assessment of tuna. This tuna tagging was successfully conducted at 86 locations, with a total of 25,197 tuna tagged with conventional tags, at an average of around 900 fish per fishing day. The releases of conventional tags comprised of 19,576 skipjack (77.7%), 5,267 yellowfin (20.9%) and 354 bigeye (1.4%). From the length frequency composition, the skipjack size range was wide, between 29 – 83 cm, but mostly between 35 and 40 cm with 38.9 cm average. The yellowfin size range of 28 – 65 cm, with most fish between 37 and 41 cm of 40.1 cm average. The small numbers of bigeye tagged were mostly larger than 38 cm, ranging from 29 to 58 cm with 41.3 cm average. During the taggingcruise, bait fish to support the fishing activity was relatively easily found in and around the survey area, either with direct catching using bouke ami net or purchasing from the lift net fisherman. By the end of 2010, 4,594 tags was recovered representing a relatively high recovery rate of 18.2% overall.
THE GENETIC STRUCTURE OF THEWHITE CYPRINID (TOR TAMBROIDES) POPULATIONS BASEDON COIGENE SEQUENCE ANALYZES Wibowo, Arif; Husnah, Husnah
Indonesian Fisheries Research Journal Vol 18, No 1 (2012): (June 2012)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (99.037 KB) | DOI: 10.15578/ifrj.18.1.2012.13-17

Abstract

The study analyzed nucleotide sequences from the mitochondrial cytochrome oxidase subunit (COI) gene region (654) to investigate the genetic structure of the white cyprinid (Tor tambroides) among nine populations from the Manna and Semanka Rivers. A total of 36 individuals were collected for this work. Five nucleotides were found to be variable, resulting in 4 haplotypes. Among the nine populations of Melebuy in Semanka River represents the highest level of variability (h = 1.000, π = 0.0015) whereas Kerinjing, Merabung and Kotabumi populations represent the highest level of variability in Manna River (h = 0.667, π = 0.0020). The Batu Aji, Air Sebilo and Kutopadang populations exhibit the lowest level of variability (h = 0.000, π = 0.000). There is an integrated population throughout all sample sites in Manna River. However, the AMOVA analysis provided corroborating evidence for genetic structure obtained from Nei’s genetic diversity statistic and the FST value (0.310), suggested there is genetic divergence among populations of those populations. Of the total genetic diversity, 35% was attributable to inter-population diversity and the remainder (68.92%) to differences within populations. These two approaches produced a picture of genetic structure in Manna and Semanka River. A molecular phylogenetic tree constructed using The Neighbor-joining (NJ) method showed the 4 haplotypes were assigned to two clades associated geographic regions. These results provide basic information for the conservation and sustainable exploitation of this species.
DEVELOPING RECOMMENDATIONS FOR UNDERTAKING CPUE STANDARDISATION USING OBSERVER PROGRAM DATA Sadiyah, Lilis; Dowling, Natalie; Prisantoso, Budi Iskandar
Indonesian Fisheries Research Journal Vol 18, No 1 (2012): (June 2012)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (664 KB) | DOI: 10.15578/ifrj.18.1.2012.19-33

Abstract

Abundance indices based on nominal CPUE do not take into account confounding factors such as fishing strategy and environmental conditions, that can decouple any underlying abundance signal in the catch rate. As such, the assumption that CPUE is proportional to abundance is frequently violated. CPUE standardisation is one of the common analyses applied. The aims of this paper were to provide a statistical modelling framework for conducting CPUE standardisations using the Observer Program data for bigeye tuna, yellowfin tuna, albacore and southern bluefin tuna, and provide a comparison in the trends between the nominal CPUEs and their standardised indices obtained. The CPUE standardisations were conducted on the Observer Program collected between 2005 and 2007, by applying GLM analysis using the Tweedie distribution. The results suggested that year, area, HBF and bait factors significantly influenced the nominal CPUEs for the four tuna species of interest. Some extreme peaks and troughs in the nominal time series were smoothed in the standardised CPUE timeseries. The high degree of temporal variability that is still shown in the standardised CPUE trends suggests that the data are too sparse to give any meaningful indication of proxy abundance. Nevertheless, this may also suggest that variables used in the GLMs do not sufficiently account for allof the confounding factors, or abundance may indeed be truly variable.
CATCH ESTIMATION AND SIZE DISTRIBUTION OF BILLFISHES LANDED IN PORT OF BENOA, BALI Setyadji, Bram; Jumariadi, Jumariadi; Nugraha, Budi
Indonesian Fisheries Research Journal Vol 18, No 1 (2012): (June 2012)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (262.407 KB) | DOI: 10.15578/ifrj.18.1.2012.35-40

Abstract

Billfishes are generally considered as by-product in tuna long line fisheries that have high economic value in the market. By far, the information about Indian Ocean billfish biology and fisheries especially in Indonesia is very limited. This research aimed to elucidate the estimation of production and size distribution of billfishes landed in port of Benoa during 2010 (February – December) through daily observation at the processing plants. The result showed that the landings dominated by Swordfish (Xiphias gladius) 54.9%, Blue marlin (Makaira mazara) 17.8% and Black marlin (Makaira indica) 13.0% respectively, followed by small amount of striped marlin (Tetrapturus audax), sailfish (Istiophorus platypterus), and shortbil spearfish (Tetrapturus Angustirostris). Generally the individual size of billfishes range between 68 and 206 cm (PFL), and showing negative allometric pattern except on swordfish that was isometric. Most of the billfish landed haven’t reached their first sexual maturity.

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