scholarly journals Length-Weight Relationship of the Most Landed Pelagic Fish Species European Pilchard (Sardina pilchardus Walbaum, 1792) and European Anchovy (Engraulis encrasicolus Linnaeus, 1758) in the İzmir Bay (Aegean Sea, Turkey) Purse Seine Fishery

2020 ◽  
Vol 9 (1) ◽  
pp. 32-37
Author(s):  
Ahmet Mert ŞENBAHAR ◽  
Özlem GÜLEÇ ◽  
Zafer TOSUNOĞLU ◽  
Okan ÖZAYDIN
Keyword(s):  
Fish Species ◽  
Aegean Sea ◽  
Pelagic Fish ◽  
Sardina Pilchardus ◽  
Izmir Bay ◽  
European Anchovy ◽  
Engraulis Encrasicolus ◽  
Relationship Of ◽  
European Anchovy Engraulis Encrasicolus ◽  
Purse Seine Fishery

Growth and feeding patterns of European anchovy (Engraulis encrasicolus) early life stages in the Aegean Sea (NE Mediterranean)

2010 ◽  
Vol 86 (2) ◽  
pp. 299-312 ◽  
Author(s):  
Ignacio A. Catalán ◽  
Arild Folkvord ◽  
Isabel Palomera ◽  
Gemma Quílez-Badía ◽  
Fotini Kallianoti ◽  
...  
Keyword(s):  
Early Life ◽  
Aegean Sea ◽  
Life Stages ◽  
Early Life Stages ◽  
Feeding Patterns ◽  
European Anchovy ◽  
Engraulis Encrasicolus ◽  
Ne Mediterranean ◽  
European Anchovy Engraulis Encrasicolus

scholarly journals Latitudinal and interannual distribution of the European anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) in the western Mediterranean, and sampling uncertainty in abundance estimates

2010 ◽  
Vol 67 (8) ◽  
pp. 1574-1586 ◽  
Author(s):  
M. Pilar Tugores ◽  
Magdalena Iglesias ◽  
Núria Díaz ◽  
Dolores Oñate ◽  
Joan Miquel ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Western Mediterranean ◽  
Sardina Pilchardus ◽  
Sampling Uncertainty ◽  
Spawning Grounds ◽  
European Anchovy ◽  
Engraulis Encrasicolus ◽  
Late Autumn ◽  
Abundance Estimates ◽  
European Anchovy Engraulis Encrasicolus

Abstract Tugores, M. P., Iglesias, M., Díaz, N., Oñate, D., Miquel, J., and Giráldez, A. 2010. Latitudinal and interannual distribution of the European anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) in the western Mediterranean, and sampling uncertainty in abundance estimates. – ICES Journal of Marine Science, 67: 1574–1586. On the Spanish Mediterranean continental shelf, late-autumn echo-integration acoustic surveys have been performed annually since the 1990s. The surveys coincide with the recruitment season of anchovy (Engraulis encrasicolus) and the start of the spawning season of sardine (Sardina pilchardus), and they provide estimates of stock size for the main fisheries in the area. Latitudinal distribution of the abundance of the two species from 2003 till 2006 is evaluated, and transitive geostatistical techniques applied to estimate the sampling uncertainty of the overall abundance estimate. The anchovy stock was found mainly in areas influenced by river run-off, in well-known anchovy spawning areas, suggesting that anchovy remained on their spawning grounds until late autumn or that survival was higher in these regions of enhanced productivity. By the time of the surveys, sardine were already occupying their spawning grounds over the continental shelf. The precision of the abundance estimates was generally high. The few cases of low precision were re-examined and found to stem most probably from processing errors, so the re-examination has contributed to an improvement in the accuracy of the estimates. The greater precision obtained in the southern subarea suggested a greater homogeneity in the spatial distribution of both species.

scholarly journals Species diversity and dominancy indexes in Izmir Bay (Aegean Sea) purse seine fishery

2020 ◽  
Vol 37 (4) ◽  
pp. 353-356
Author(s):  
Ahmet Mert Senbahar ◽  
Özlem Güleç ◽  
Zafer Tosunoglu
Keyword(s):  
Dominant Species ◽  
Diversity Index ◽  
Aegean Sea ◽  
Purse Seine ◽  
Total Biomass ◽  
Sardina Pilchardus ◽  
Izmir Bay ◽  
Bony Fishes ◽  
Sardinella Aurita ◽  
Purse Seine Fishery

To determine the diversity index values of species caught by purse seine, all samplings were carried out between September 2, 2017, and April 6, 2018 in Izmir Bay. As a result, a total of 17 fish species (Osteichthyes) belonging to 11 families and also 2 species from invertebrates (Cephalopoda and Arthropoda) were determined. Bony fishes and invertebrates consist of 99.9% and 0.1% of the total biomass, respectively. Sardina pilchardus was the most dominated species that occupied as 80.2% of the overall bony fishes followed by Engraulis encrasicolus (14.6%) and Sardinella aurita (1.5%). Diversity index values of species were found-1.026 by Shannon-Weaver and 0.63 by Simpsons, respectively. The highest dominancy was found for S. pilchardus with 71.1%. Overall final results indicate that the diversity of species in Izmir Bay purse seine fishery is very low and also S. pilchardus is the most over-dominant species.

scholarly journals Exploitation patterns of anchovies (Engraulis encrasicolus) by marine artisanal fisheries in Togo (West Africa)

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Dédé Okangny ◽  
Gabriel Hoinsoudé Segniagbeto ◽  
Délagnon Assou ◽  
Antoine Chikou ◽  
Elie Montchowui ◽  
...  
Keyword(s):  
West Africa ◽  
Common Species ◽  
Fishing Effort ◽  
Pelagic Fish ◽  
Artisanal Fisheries ◽  
Fishing Gear ◽  
Fish Production ◽  
European Anchovy ◽  
Engraulis Encrasicolus ◽  
European Anchovy Engraulis Encrasicolus

Pelagic fish, including sardines and anchovies (Order Clupeiformes), are the most common species taken by artisanal marine fisheries along the Togolese coast. We investigated fisher involvement as well as fish captures over a period of 10 years, particularly of the European anchovy (Engraulis encrasicolus). Our results indicate that 60% of fishers operated from the Lomé fishing harbour, most fishers being Ghanaians working seasonally in Togo. 63.7% of all the fishers used canoes with outboards, a higher percentage compared to the previous decades. Seven fishing gear type were identified, with bottom gillnet and surface gillnet being the most commonly used. However, in the most important fishing camp in the country in terms of fish production (Lomé fishing harbour), all fishers used shark nets. Overall, fisheries catches did not change significantly across years, but anchovy fishing effort and catch per unit of effort (CPUE) declined over the study period, suggesting some depletion of the species stocks on the Togolese coast and a demotivation of fishers. 

Diet composition of adult twaite shad (Alosa fallax) in the Aegean Sea (Izmir Bay, Turkey)

2011 ◽  
Vol 92 (3) ◽  
pp. 601-604 ◽  
Author(s):  
Tevfik Ceyhan ◽  
Okan Akyol ◽  
T. Murat Sever ◽  
Ali Kara
Keyword(s):  
Prey Item ◽  
Diet Composition ◽  
Aegean Sea ◽  
Pelagic Fish ◽  
Small Pelagic Fish ◽  
Izmir Bay ◽  
Engraulis Encrasicolus ◽  
Twaite Shad ◽  
Alosa Fallax ◽  
Prey Items

Specimens of twaite shad, Alosa fallax were sampled from commercial purse seiners and trammel netters in Izmir Bay during November and December 2007. A total of 287 prey items from 14 taxa from 208 stomachs were recorded. The primary food of twaite shad was found to be fish, especially anchovy Engraulis encrasicolus, which was the most frequent (%F = 66.11) and abundant (%N = 63.64) prey item, and also had the highest percentage by weight (%W = 81.91). Decapoda, Isopoda, Ostracoda and Copepoda (Calanus spp., Candocia armata, Temora stylifera from Calanoida and Corycaeus spp. from Cyclopodia), were recorded occasionally with low values for all indices. The study showed that in the Aegean Sea Alosa fallax is a predator of small pelagic fish, E. encrasicolus, A. boyeri, S. pilchardus, and some crustaceans. Benthopelagic P. acarne and demersal S. hepatus were first recorded in diet of twaite shad.

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