scholarly journals Interaction between small pelagic purse seine fishery and its top predators

2018 ◽  
Vol 59 (2) ◽  
pp. 185-190
Author(s):  
Barbara Zorica ◽  
Vanja Čikeš Keč ◽  
Kristijan Zanki ◽  
Leon Grubišić ◽  
Tanja Šegvić-Bubić
Keyword(s):  
Preliminary Data ◽  
Negative Impact ◽  
Pelagic Fish ◽  
Purse Seine ◽  
Small Pelagic Fish ◽  
Fish Schools ◽  
Top Predators ◽  
Increasing Trend ◽  
Monthly Pattern ◽  
Purse Seine Fishery

Due to very good collaboration with one commercial purse seiner, using “Srdelara” and operating in fishing zone G, preliminary data concerning the interaction between small pelagic purse seine fishery and its predators were obtained. According to the notes taken by experience observer on-board in period from year 2013 to 2016, seems that tunas, dolphins and swordfish were the faithful companions of purse seiner fisherman with abundance of 68.6%, 22.0% and 9.4%, respectively. Although they were present all year round, their monthly pattern of appearance indicated that less tunas were recorded in May-June, more dolphins were noted from July to October while swordfish were mostly abundant in winter (January-March). Within the investigated period, slightly increasing trend of tuna and dolphins’ appearance was recorded, although statistically not significant. Analysing possible correlation between purse seine catches and predator’s abundances, revealed that appearance of tuna had negative impact on the catches (dispersion of schools), while realised catches in presence of dolphins were quite good so it seems that they tend to round up small pelagic fish schools.

scholarly journals Discards of the purse seine fishery targeting small pelagic fish in the eastern Mediterranean Sea

2012 ◽  
Vol 76 (3) ◽  
pp. 561-572 ◽  
Author(s):  
Konstantinos Tsagarakis ◽  
Vassiliki Vassilopoulou ◽  
Argyris Kallianiotis ◽  
Athanassios Machias
Keyword(s):  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
Pelagic Fish ◽  
Purse Seine ◽  
Small Pelagic Fish ◽  
Eastern Mediterranean Sea ◽  
Purse Seine Fishery

scholarly journals Mitigating Slipping-Related Mortality from Purse Seine Fisheries for Small Pelagic Fish: Case Studies from European Atlantic Waters

2018 ◽  
pp. 297-318 ◽  
Author(s):  
Ana Marçalo ◽  
Mike Breen ◽  
Maria Tenningen ◽  
Iñigo Onandia ◽  
Luis Arregi ◽  
...  
Keyword(s):  
Case Studies ◽  
Pelagic Fish ◽  
Purse Seine ◽  
Small Pelagic Fish ◽  
Related Mortality

scholarly journals RESPONSIBLE FISHERIES MANAGEMENT OF MINI PURSE SEINE IN THE LAMPUNG BAY AREA

2017 ◽  
Vol 8 (2) ◽  
pp. 713-728
Author(s):  
Yulia Estmirar Tanjov ◽  
Roza Yusfiandayani ◽  
. Mustaruddin
Keyword(s):  
Fishing Effort ◽  
Maximum Sustainable Yield ◽  
Pelagic Fish ◽  
Purse Seine ◽  
Sustainable Yield ◽  
Catch Per Unit Effort ◽  
Small Pelagic Fish ◽  
Bay Area ◽  
Fisheries Resources ◽  
The Status

Lempasing is a Coastal Fishing Port (CFP) which located in Bandar Lampung. It is one of the centers of fisheries activities in the city. One of the fishing gear which operated by most of fishermen in Lempasing is mini purse seine. Mini purse seine fishing activities in the Lampung Bay Area and Lempasing CFP is not in accordance with the conditions of the surrounding waters area. The research was conducted in the Lampung Bay Area and Lempasing CFP, Lampung. This study aims to: 1) determine the status of fisheries resources utilization, 2) to describe the dominant fish caught by mini purse seine.  Analysis methods were used in this study namely: 1) Fishing Power Index (FPI), Catch Per Unit Effort (CPUE), and Maximum Sustainable Yield (MSY) to determine the status of fisheries resource utilization. The dominant small pelagic fishes caught were scad fish Selaroides sp., mackerel fish Rastrelliger sp., longnose trevally fish Carangoides chrysophrys. The result showed that Fox model was the best fits models with estimated maximum sustainable yield of 15.5 ton and fishing effort of 992 trip/year for mini purse seine. The longnose trevally fish in lampung bay area in do not exceeded the optimal catch fish condition can be used to sustainably. In these condition is necessary to wisely manage and setting the catches to not exceed the allowable catch of the small pelagic fish, so the stock of small pelagic fish in the Lampung Bay Area can be used sustainably.

scholarly journals RESPONSIBLE FISHERIES MANAGEMENT OF MINI PURSE SEINE IN THE LAMPUNG BAY AREA

2017 ◽  
Vol 8 (2) ◽  
pp. 713
Author(s):  
Yulia Estmirar Tanjov ◽  
Roza Yusfiandayani ◽  
. Mustaruddin
Keyword(s):  
Fishing Effort ◽  
Maximum Sustainable Yield ◽  
Pelagic Fish ◽  
Purse Seine ◽  
Sustainable Yield ◽  
Catch Per Unit Effort ◽  
Small Pelagic Fish ◽  
Bay Area ◽  
Fisheries Resources ◽  
The Status

<p><em>Lempasing is a Coastal Fishing Port (CFP) which located in Bandar Lampung. It is one of the centers of fisheries activities in the city. One of the fishing gear which operated by most of fishermen in Lempasing is mini purse seine. Mini purse seine fishing activities in the Lampung Bay Area and Lempasing CFP is not in accordance with the conditions of the surrounding waters area. The research was conducted in the Lampung Bay Area and Lempasing CFP, Lampung. This study aims to: 1) determine the status of fisheries resources utilization, 2)</em><em> to describe the dominant fish caught by mini purse seine. </em><em> Analysis methods were used in this study namely: 1) Fishing Power Index (FPI), Catch Per Unit Effort (CPUE), and Maximum Sustainable Yield (MSY) to determine the status of fisheries resource utilization. The dominant small pelagic fishes caught were scad fish <span style="text-decoration: underline;">Selaroides</span> </em>sp<em>., mackerel fish <span style="text-decoration: underline;">Rastrelliger</span> </em>sp<em>., longnose trevally fish <span style="text-decoration: underline;">Carangoides</span> <span style="text-decoration: underline;">chrysophrys</span>. The result showed that Fox model was the best fits models with estimated maximum sustainable yield of 15.5 ton and fishing effort of 992 trip/year for mini purse seine. The longnose trevally fish in lampung bay area in do not exceeded the optimal catch fish condition can be used to sustainably. In these condition is necessary to wisely manage and setting the catches to not exceed the allowable catch of the small pelagic fish, so the stock of small pelagic fish in the Lampung Bay Area can be used sustainably.</em></p>

scholarly journals Species identification of small pelagic fish schools by means of hydroacoustics in the Eastern Mediterranean Sea

2015 ◽  
Vol 16 (1) ◽  
pp. 151 ◽  
Author(s):  
K. TSAGARAKIS ◽  
M. GIANNOULAKI ◽  
M. M. PYROUNAKI ◽  
A. MACHIAS
Keyword(s):  
Eastern Mediterranean ◽  
Intraspecific Variability ◽  
Aegean Sea ◽  
Pelagic Fish ◽  
Correct Identification ◽  
Small Pelagic Fish ◽  
Fish Schools ◽  
Atlantic Mackerel ◽  
Pooled Data ◽  
The North

  Reliable biomass estimates by means of hydroacoustics largely depend on the correct identification of acoustic targets. Data collected during five summer acoustic surveys (2004-2008) in the North Aegean Sea (Greece) were analyzed to explore effective discrimination of small pelagic fish schools according to the species they belong. Discriminant Function Analyses (DFA) using bathymetric, energetic and morphometric school descriptors as explanatory variables were applied per research cruise as well as to pooled data from all surveys. Results revealed that the schools can be successfully classified into the five species considered (anchovy Engraulis encrasicolus, sardine Sardina pilchardus, round sardinella Sardinella aurita, blue whiting Micromessistius poutassou, and Atlantic mackerel Scomber scombrus). The percentage of correct classifications in terms of number of schools was higher in the analyses of the annual cruises (75.6%-95.36%) than in the analysis of pooled data (≈72%). This is because of (i) the lower number of species, as well as (ii) the reduced intraspecific variability, occurring in each separate cruise. Significant differences were detected among school descriptors for the different species, revealing discrete aspects of schooling behaviour for each species. The benefit of the specific approach is that the classification functions of the DFAs can be used to classify a larger set of schools, which has not been possible to assign to specific species. Overall the approach constitutes an objective, more automated and less time consuming procedure for the analysis of acoustic data and can contribute to the improvement of biomass estimates in the area.

scholarly journals PERIKANAN PUKAT CINCIN DI PEMANGKAT, KALIMANTAN BARAT

2017 ◽  
Vol 15 (1) ◽  
pp. 79
Author(s):  
Tuti Hariati ◽  
Umi Chodrijah ◽  
Muhammad Taufik
Keyword(s):  
Landing Site ◽  
Maximum Sustainable Yield ◽  
Pelagic Fish ◽  
The Other ◽  
Purse Seine ◽  
North Coast ◽  
Small Pelagic Fish ◽  
Pelagic Fishes ◽  
Sardinella Gibbosa ◽  
Rastrelliger Kanagurta

Pemanfaatan sumber daya ikan pelagis kecil di Laut Cina Selatan wilayah Indonesia (luasnya sekitar 595.000 km2), khususnya di perairan pantai Kalimantan Barat dengan sasaran utamanya ikan kembung (Rastrelliger brachyosoma) pada tahun 1991 telah mencapai 94% dari rata-rata hasil tangkapan maksimum lestari. Perkembangan penangkapan ikan pelagis kecil ke arah lepas pantai yang dirintis oleh armada pukat cincin Pekalongan sejak tahun 1985 di perairan Pejantan telah diikuti oleh nelayan Kalimantan Barat, khususnya di Pemangkat pada tahun 1990. Jumlah kapal pukat cincin Pemangkat yang pada tahun 1995 hanya enam unit, pada tiap tahunnya meningkat sampai mencapai 48 unit pada tahun 2003. Penelitian ini bertujuan untuk memperoleh gambaran perikanan pelagis kecil yang berbasis di Pemangkat dengan alat tangkap pukat cincin. Analisis dilakukan berdasarkan pada data log book tiap trip kapal pukat cincin pada periode tahun 2004 - 2006. Hasil tangkapan pukat cincin didominansi oleh ikan pelagis kecil, terutama 2 jenis ikan layang (Decapterus russelli dan D. macrosoma), bentong (Selar crumenophthalmus), banyar (Rastrelliger kanagurta), dan tembang (Sardinella gibbosa), serta jenis-jenis ikan lainnya yang bernilai ekonomis. Hasil tangkapan ikan pelagis kecil bervariasi menurut musim, yaitu paling tinggi pada musim peralihan 1 dan peralihan 2, serta paling rendah pada musim barat. Catch per unit of effort jenis-jenis ikan pelagis kecil dari tahun 2005 - 2006 pada umumnya cenderung turun, diduga akibat tingginya jumlah upaya dari banyak armada pukat cincin lain, baik dari wilayah Indonesia maupun dari luar negeri. Exploitation of small pelagic fish resources in the South China Sea of Indonesian region (around 595,000 km2) especially in the coastal waters ofWest Kalimantan Province which short bodied mackerel (Rastrelliger brachyosoma) as the main target had reached at a rate of 94% of the average of maximum sustainable yield. The development of fishing on small pelagic fishes toward off shore pioneered by purse seine fleet of Pekalongan (north coast of Java) since 1985 then followed by fishermen of West Kalimantan, especially in Pemangkat in 1990. The number of purse seine of Pemangkat that only 6 units in 1995 increased every year up to 43 units in 2003. The aim of this research was to describe small pelagis fishery in the Pemangkat landing site by purse seine. Analysis was conducted based on log book data of purse seiners during the period of 2004 to 2006. During the period of 2004 to 2006, the catch of Pemangkat purse seine was mostly small pelagic fish mainly composed of 2 species of scads (Decapterus russelli and D. macrosoma), big eye scad (Selar crumenophthalmus), Indian mackerel (Rastrelliger kanagurta), and fringerscale sardine (Sardinella gibbosa), also the other economic fishes. Both the catch varied between moonson. The highest catch was during the two intermoonsons and the lowest catch was during the west moonson. Catch per unit of effort of the small pelagic fishes from 2005 to 2006 mainly decreased, since the high amount of the efforts from purse seine fleets of the other locations of Indonesia as well as foreign countries.

scholarly journals EXPLOITATION AND CPUE TREND OF THE SMALL PELAGIC FISHERIES IN THE SULAWESI SEA, INDONESIA

2012 ◽  
Vol 18 (2) ◽  
pp. 63
Author(s):  
Lilis Sadiyah ◽  
Purwanto Purwanto ◽  
Andhika P. Prasetyo
Keyword(s):  
General Pattern ◽  
Pelagic Fish ◽  
Fish Stock ◽  
Yield Model ◽  
Small Pelagic Fish ◽  
Fish Stocks ◽  
Increasing Trend ◽  
The Status ◽  
Expected Benefits ◽  
Pelagic Fisheries

One of the expected benefits of the Sulu-Celebes Sea Project during its implementation is to have increased fish stocks at demonstration sites, as indicated by the Catch per Unit of Effort (CPUE). Analysis of catch and effort data of the small pelagic fisheries by using the surplus yield model was done to obtain information on the likely trend of CPUE for the last ten years. By using the pajeko as the standardized fishing gear the trend of CPUE has been calculated. Between 2000-2005, the trend of production (catch), effort and CPUE followed the general pattern of the exploited fisheries that already fully exploited, where the increasing trend of effort was not followed by the increasing catch. On the other hand, the trend of CPUE is decreased. In the following years, the trend of both catch and CPUE do not follow the general pattern of the exploited fisheries. The trend of catch, effort and CPUE has likely been stable, indicating that the fishery in this period has been leveled-off. The status of exploitation of the small pelagic fish resources in the Indonesian Sulawesi Sea is demermined by the MSY level that has likely been surpassed during the period 2003-2004. Therefore with the increasing effort in the following year the trend of catch was relatively stable. It is likely that the small pelagic fish stock in the Indonesian Sulawesi Sea might be ‘fully exploited’.

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