Stock enhancement by hatchery-released turbot, Psetta maxima, in the southeastern Black Sea: capture, migration, growth and diet analyses
In this study, the capture, growth, migration and diet of hatchery-released turbots (Psetta maxima) were examined in the southeastern Black Sea region for six years (2009-2014). A total of 9933 turbots were marked with individual serial-numbered T-bar anchor tags and released at Trabzon, Turkey. The...
| Published in: | Biomolecules |
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| Main Authors: | , , , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Consejo Superior de Investigaciones Científicas
2016
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| Subjects: | |
| Online Access: | https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1632 https://doi.org/10.3989/scimar.04324.25A |
| Summary: | In this study, the capture, growth, migration and diet of hatchery-released turbots (Psetta maxima) were examined in the southeastern Black Sea region for six years (2009-2014). A total of 9933 turbots were marked with individual serial-numbered T-bar anchor tags and released at Trabzon, Turkey. The mean TL and weight of the released turbots were 12.91 cm (±1.25) and 35.41 g (±12.38) and the same measurements for the captured turbots were 31.17±0.86 cm and 878.08±69.47 g, respectively. A total of 2.7% (270 fishes) of the tagged individuals were captured during the study period and the age of the captured tagged fishes was between 0+ and 5+ years. Growth of the captured turbots was analytically examined. Movements of the tagged turbots were expressed as “resident” and “migratory”. Three prey groups showed the majority of forage organisms; teleost fishes, crustaceans and mollusks in the stomach of the captured turbots. The hatchery-released turbots might be used for stock enhancement due to their high growth rate and commercial value, and their relatively limited migration range. En este estudio se examinaron datos de captura, crecimiento, migración y dieta, de rodaballos (Psetta maxima) criados en cautividad y liberados en zonas del sudeste del Mar Negro, durante seis años (2009-2014). Se marcaron individualmente un total de 9933 rodaballos, utilizando marcas numeradas en serie (marcas de plástico tipo T) y se liberaron en Trabzon (Turquía). Las medias de longitud total (TL) y peso total de los rodaballos liberados fueron de 12.91 cm (±1.25) y 35.41 g (±12.38), y las mismas medidas para los rodaballos capturados fueron de 31.17±0.86 cm y 878.08±69.47 g, respectivamente. Un 2.7% (270 peces) de los individuos marcados fue capturado durante el periodo de estudio y la edad de estos individuos osciló entre 0+ y 5+ años de edad. El crecimiento de los rodaballos capturados se examinó analíticamente. Los movimientos de los rodaballos marcados fueron expresados como “residentes” y “migratorios”. La mayoría de los organismos presentes en los estómagos de los rodaballos capturados pertenecían a tres grupos de presas: peces teleósteos, crustáceos y moluscos. Los rodaballos criados en cautividad y liberados podrían ser usados en la mejora de stocks debido a su elevada tasa de crecimiento, valor comercial, y su relativamente limitado rango de migración. |
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