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Age and growth of the European catfish (Silurus glanis) in a Turkish Reservoir and comparison with introduced populations

The European catfish, Silurus glanis, is native to eastern Europe and western Asia and is among the largest freshwater fish in the world. Despite its increasing economic importance and its frequent introductions, the ecology and life-history of this species is poorly known due to the difficulty of sampling such a large species in large rivers and standing waters. Our study provides the first data on age and growth of this species in Turkish waters, where it is native. We report the length-weight relationships and age and size structure of this population, which were significantly different between females and males. A marginal increment analysis indicated that annulus formation occurred between May and June. The estimates of three growth functions (von Bertalanffy, logistic and Gompertz) are reported, with the von Bertalanffy growth providing a better fit and more realistic parameter estimates. Growth rates were significantly higher in males than in females and were overall higher compared to other native populations but similar to introduced populations of similar latitude

EGB was supported by the Spanish Ministry of Science (projects CGL2009-12877-C02-01 and Consolider-Ingenio 2010 CSD2009-00065).

© Reviews in Fish Biology and Fisheries, 2011, vol. 21, núm. 2, p. 283-294

Springer Verlag

Autor: Alp, Ahmet
Kara, Cemil
Üçkardeş, Fatih
Carol Bruguera, Joaquim
García-Berthou, Emili
Data: 2011
Resum: The European catfish, Silurus glanis, is native to eastern Europe and western Asia and is among the largest freshwater fish in the world. Despite its increasing economic importance and its frequent introductions, the ecology and life-history of this species is poorly known due to the difficulty of sampling such a large species in large rivers and standing waters. Our study provides the first data on age and growth of this species in Turkish waters, where it is native. We report the length-weight relationships and age and size structure of this population, which were significantly different between females and males. A marginal increment analysis indicated that annulus formation occurred between May and June. The estimates of three growth functions (von Bertalanffy, logistic and Gompertz) are reported, with the von Bertalanffy growth providing a better fit and more realistic parameter estimates. Growth rates were significantly higher in males than in females and were overall higher compared to other native populations but similar to introduced populations of similar latitude
EGB was supported by the Spanish Ministry of Science (projects CGL2009-12877-C02-01 and Consolider-Ingenio 2010 CSD2009-00065).
Format: application/pdf
ISSN: 0960-3166 (versió paper)
1573-5184 (versió electrònica)
Accés al document: http://hdl.handle.net/10256/12396
Llenguatge: eng
Editor: Springer Verlag
Col·lecció: MICINN/PN 2010-2012/CGL2009-12877-C02-01
MICINN/PN 2009-2014/CSD2009-00065
Reproducció digital del document publicat a: http://dx.doi.org/10.1007/s11160-010-9168-4
Articles publicats (D-CCAA)
És part de: © Reviews in Fish Biology and Fisheries, 2011, vol. 21, núm. 2, p. 283-294
Drets: Tots els drets reservats
Matèria: Animals invasors
Introduced organisms
Espècies introduïdes
Peixos d’aigua dolça -- Creixement
Freshwater fishes -- Growth
Títol: Age and growth of the European catfish (Silurus glanis) in a Turkish Reservoir and comparison with introduced populations
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

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