Capacidad de búsqueda de alimento en canales seminaturales de juveniles de trucha común autóctona de origen mediterráneo y de stocks alóctonos cliados en cautividad
Loading...
Date
2011
Authors
Mitjana Nerín, Olga MaríaAlabart Alvarez, José Luis
Clavero, J.L.
Blasco Martínez, José María
Josa, A.
Espinosa, E.
Journal Title
Journal ISSN
Volume Title
Publisher
Typology
conferenceObjectAbstract
Stocked brown trouts have reduced ability to obtain food resulting in reduced
survival rates. Adaptation to natural environments of farm-reared fishes becomes crucial
early after restocking. The aim of this work was to evaluate the self-feeding ability of different
strains of juvenile brown trout placed at different densities and in presence or absence of
predators. Three different strains of juvenile brown trout were placed for 3 weeks into seminatural
ponds at two stocking densities, and in presence/absence of predators. Predators
were adult mature trouts stocked prior introducing juveniles. An Atlantic strain from domestic
origin was used as control. F2 juveniles from two different native Mediterranean brown trout
populations were also used. The presence of food in stomach contents was assessed after
necropsy. Feeding ability was decreased in presence of predators and high juvenile densities
with important differences among trout strains.
Description
Keywords
Brown trout, Adaptation, Restocking
Bibliographic citation
Mitjana, O., Clavero, J.L., Alabart, J.L., Blasco, J.M., Josa, A., Espinosa, E. “Capacidad de búsqueda de alimento en canales seminaturales de juveniles de trucha común autóctona de origen mediterráneo y de stocks alóctonos cliados en cautividad“.En: 41 Jornadas de Estudio. XIV Jornadas sobre Producción Animal. AIDA. Zaragoza, España, 17 y 18 de mayo de 2011, pp.130-132. ISBN: 978-84-615-0062-8
Other field subjects
TruchaAcuicultura
Producción y sanidad animal