scholarly journals Effect of environmental conditions on the seasonal and inter-annual variability of small pelagic fish abundance off North-West Africa: The case of both Senegalese sardinella

2017 ◽  
Vol 26 (5) ◽  
pp. 583-601 ◽  
Author(s):  
Modou Thiaw ◽  
Pierre-Amaël Auger ◽  
Fambaye Ngom ◽  
Timothée Brochier ◽  
Saliou Faye ◽  
...  
Keyword(s):  
West Africa ◽  
Environmental Conditions ◽  
Pelagic Fish ◽  
Fish Abundance ◽  
Small Pelagic Fish ◽  
North West ◽  
Annual Variability

Metal Content in Small Pelagic Fish in the North-West Africa

2019 ◽  
Vol 35 (2) ◽  
pp. 643-653 ◽  
Author(s):  
Enrique Lozano-Bilbao ◽  
Yanira Díaz ◽  
Gonzalo Lozano ◽  
Alba Jurado-Ruzafa ◽  
Arturo Hardisson ◽  
...  
Keyword(s):  
West Africa ◽  
Metal Content ◽  
Pelagic Fish ◽  
Small Pelagic Fish ◽  
North West ◽  
The North

Development stage and season influence in the metal content of small pelagic fish in the North-West Africa

Chemosphere ◽  
2020 ◽  
Vol 261 ◽  
pp. 127692
Author(s):  
Enrique Lozano-Bilbao ◽  
Alba Jurado-Ruzafa ◽  
Gonzalo Lozano ◽  
Sebastián Jiménez ◽  
Arturo Hardisson ◽  
...  
Keyword(s):  
West Africa ◽  
Metal Content ◽  
Development Stage ◽  
Pelagic Fish ◽  
Small Pelagic Fish ◽  
North West ◽  
The North

scholarly journals DINAMIKA EKOLOGI LAUT SULAWESI (WPP 716) SEBAGAI DAYA DUKUNG TERHADAP PERIKANAN MALALUGIS (Decapterus macarellus Cuvier, 1833)

2015 ◽  
Vol 21 (2) ◽  
pp. 95
Author(s):  
Puji Rahmadi ◽  
Reny Puspasari
Keyword(s):  
Environmental Conditions ◽  
Water Body ◽  
Pelagic Fish ◽  
Total Catch ◽  
Small Pelagic Fish ◽  
North Sulawesi ◽  
Fishery Products ◽  
Fish Schooling ◽  
High Level ◽  
Pelagic Fishery

<p>Ikan Malalugis adalah ikan pelagis kecil yang merupakan hasil tangkapan utama nelayan di perairan Laut Sulawesi. Pada tahun 2012 dilaporkan bahwa perikanan pelagis kecil menjadi salah satu hasil perikanan yang penting, dan hasil tangkapan yang dominan dari perikanan pelagis kecil tersebut adalah ikan malalugis biru (Decapterus macarellus). Jenis ikan malalugis memiliki sifat bermigrasi dan membentuk gerombolan kecil yang mana sangat dipengaruhi oleh kondisi lingkungannya. Tipe arus pasut di Teluk Manado (Laut Sulawesi) merupakan arus pasut bolak balik (reversing current). Banyaknya arus yang begitu aktif merupakan salah satu faktor yang mendukung habitat ikan malalugis. Diduga kekhasan sifat distribusi arus di daerah laut Sulawesi ini yang membuat kelimpahan ikan malalugis relatif tinggi di perairan Sulawesi Utara dibandingkan dengan daerah perairan lainnya di Indonesia. Kelimpahan ikan malalugis yang tinggi mendorong ikan ini menjadi komoditas penting dalam sektor perikanan di Laut Sulawesi. Meski demikian pada tahun 2012 dilaporkan bahwa tingkat produksi ikan malalugis mengalami penurunan. Hal ini diduga karena terlalu tingginya tingkat eksploitasi atau diakibatkan oleh adanya perubahan dalam kondisi ekosistem ikan tersebut di Laut Sulawesi. Oleh karena itu studi ini dilakukan untuk mengkaji tingkat daya dukung lingkungan terhadap keberlangsungan sumberdaya perikanan malalugis di wilayah perairan Laut Sulawesi.</p><p><br /><em>Malalugis fish is a small pelagic fish that constitute the main catch of fishermen in the waters of North Celebes Sea. In 2012 it was reported that small pelagic fishery became one of the important fishery products and it was dominated by the species of Malalugis (Decapterus macarellus). This species has a typical behavior which was highly mobility and forming fish schooling and strongly influenced by environmental conditions. The type of tidal current in North Sulawesi coast is reversing current. This kind of current could make a very active current in the water which is suitable for the habitat of Malalugis. This distinctiveness of current was considered as a trigger for relatively high abundance of Malalugis in this area compared to its </em><em>abundance in other water body of Indonesian territory. In 2012, total catch of this species has been reported to be decreased; thismay caused by either high level of exploitation nor changing on its habitat or even both. This study was conducted to investigate the capability of ecosystem and habitat of Malalugis to support its sustainability.</em></p>

scholarly journals Characterisation of season-wise spatial distribution of small pelagic fishery in Kerala, south-west coast of India

2019 ◽  
Vol 66 (4) ◽  
Author(s):  
P.H. Dhiju Das ◽  
C.G. Joshy ◽  
Leela Edwin
Keyword(s):  
Pelagic Fish ◽  
Additive Models ◽  
Fish Abundance ◽  
Fishing Ground ◽  
Small Pelagic Fish ◽  
Geostatistical Methods ◽  
South West Coast ◽  
Spatial Parameters ◽  
Pelagic Fishing ◽  
Pelagic Fishery

In this study, we attempted to identify and characterise the spatial variability of small pelagic fish abundance using geostatistical methods. The small pelagic fish abundance was estimated in terms of spatial parameters using generalised additive models (GAMs). The ring seine fishing grounds in the south-eastern Arabian Sea exhibited seasonal variability in distribution. Results of the study would help in prediction of the major pelagic fishing grounds for traditional fishers which would help in reducing fuel and time spent on searching for the fishing ground leading to sustainable exploitation. The prediction model can contribute to the management of pelagic fishery along the Kerala coast.

scholarly journals Informasi Spasial Pendugaan Potensi Ikan Pelagis Kecil di Perairan Tapanuli Tengah dan Sibolga

2020 ◽  
Vol 25 (2) ◽  
pp. 145
Author(s):  
Rosmasita Rosmasita ◽  
Bastian Putrayadi Silalahi ◽  
Fitri Ariani ◽  
Hasamuel Situmeang ◽  
Berliana Novita
Keyword(s):  
Spatial Information ◽  
Secondary Data ◽  
Pelagic Fish ◽  
Fish Abundance ◽  
High Abundance ◽  
Small Islands ◽  
Small Pelagic Fish ◽  
The North ◽  
North Sumatra

Tapanuli Tengah and Sibolga are one of the producers of small pelagic fish in the waters of West Sumatera. Spatial information on estimating the potential of small pelagic fish in the waters of Central Tapanuli and Sibolga is needed to determine the sustainability of the fish and make it easier for fishermen to catch fish. This research was conducted in February-April 2020 by utilizing secondary data from the North Sumatra Province Fisheries and Maritime Service in 2010 - 2015 in the preparation of the Coastal and Small Islands Zoning Plan (RZWP3) in 2016. The result showed the potential of small pelagic fish that exist in Tapanuli Tengah and Sibolga waters there are 18 species with a total volume and value of production, namely: Sibolga is 23,699.2 Tons (Rp.382.45 Billion) and Tapanuli Tengah is 16,921.8 Tons (Rp. 254.37 Billion). Estimation of fish abundance in Tapanuli Tengah and Sibolga waters are classified in Medium and High. The types of fish in Tapanuli Tengah waters are: Restrelinger spp, Selaroides leptolepis, stolephorus commersoni and Mugil Sp. Whereas in Sibolga waters the types of fish that are classified as having high abundance are Stolephorus commersoni, Decafterus ruselli and Dussumeiria spp, while Restrelinger spp and Selaroides leptolepis classified is medium

The box-balance model: a new tool to assess fish larval survival, applied to field data on two small pelagic fish

2020 ◽  
Vol 650 ◽  
pp. 289-308 ◽  
Author(s):  
V Raya ◽  
J Salat ◽  
A Sabatés
Keyword(s):  
Field Data ◽  
Fish Larvae ◽  
Larval Growth ◽  
Warming Trend ◽  
Mortality Rates ◽  
Larval Survival ◽  
Pelagic Fish ◽  
Balance Model ◽  
Small Pelagic Fish ◽  
Mesoscale Structures

This work develops a new method, the box-balance model (BBM), to assess the role of hydrodynamic structures in the survival of fish larvae. The BBM was applied in the northwest Mediterranean to field data, on 2 small pelagic fish species whose larvae coexist in summer: Engraulis encrasicolus, a dominant species, and Sardinella aurita, which is expanding northwards in relation to sea warming. The BBM allows one to quantify the contribution of circulation, with significant mesoscale activity, to the survival of fish larvae, clearly separating the effect of transport from biological factors. It is based on comparing the larval abundances at age found in local target areas, associated with the mesoscale structures (boxes), to those predicted by the overall mortality rate of the population in the region. The application of the BBM reveals that dispersion/retention by hydrodynamic structures favours the survival of E. encrasicolus larvae. In addition, since larval growth and mortality rates of the species are required parameters for application of the BBM, we present their estimates for S. aurita in the region for the first time. Although growth and mortality rates found for S. aurita are both higher than for E. encrasicolus, their combined effect confers a lower survival to S. aurita larvae. Thus, although the warming trend in the region would contribute to the expansion of the fast-growing species S. aurita, we can confirm that E. encrasicolus is well established, with a better adapted survival strategy.

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