Sex identification and PIT-tagging: tools and prospects for studying intersexual differences in freshwater fishes


Autoria(s): Hulthén, K.; Chapman, B. B.; Nilsson, P. A.; Hansson, L.-A.; Skov, C.; Baktoft, H.; Brodersen, J.; Brönmark, C.
Data(s)

2014

Resumo

This study evaluated a technique to allow the long-term monitoring of individual fishes of known sex in the wild using sex confirmation in close proximity to the reproductive period combined with individual tagging. Hundreds of partially migratory roach Rutilus rutilus were tagged with passive integrated transponders (PIT) following sex determination in spring and various performance measures were compared with fish tagged outside the reproductive period in autumn. Short-term survival was > 95% for R. rutilus sexed and tagged under natural field conditions. Total length (LT) did not affect the probability of survival within the size range tagged (119–280mm), nor were there differences in timing of migration the following season between individuals sexed and tagged in spring and individuals tagged in autumn (i.e. outside the reproductive period). Also, a similar per cent of R. rutilus sexed and tagged in spring and tagged in autumn migrated the following season (34·5 and 34·7%). Moreover, long-term recapture data revealed no significant differences in body condition between R. rutilus individuals sexed and tagged in spring, individuals tagged in autumn and unmanipulated individuals. The observed sex ratio of recaptured fish did not differ from the expected values of equal recapture rates between males and females. Hence, there is no observable evidence for an adverse effect of tagging close to the reproductive period and therefore this method is suitable for studying intersexual differences and other phenotypic traits temporarily expressed during reproduction at the individual level in fishes.

Formato

application/pdf

Identificador

http://boris.unibe.ch/48871/1/Hulthen_etal_2014_JFB.pdf

Hulthén, K.; Chapman, B. B.; Nilsson, P. A.; Hansson, L.-A.; Skov, C.; Baktoft, H.; Brodersen, J.; Brönmark, C. (2014). Sex identification and PIT-tagging: tools and prospects for studying intersexual differences in freshwater fishes. Journal of fish biology, 84(2), pp. 503-512. Blackwell 10.1111/jfb.12300 <http://dx.doi.org/10.1111/jfb.12300>

doi:10.7892/boris.48871

info:doi:10.1111/jfb.12300

urn:issn:0022-1112

Idioma(s)

eng

Publicador

Blackwell

Relação

http://boris.unibe.ch/48871/

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Hulthén, K.; Chapman, B. B.; Nilsson, P. A.; Hansson, L.-A.; Skov, C.; Baktoft, H.; Brodersen, J.; Brönmark, C. (2014). Sex identification and PIT-tagging: tools and prospects for studying intersexual differences in freshwater fishes. Journal of fish biology, 84(2), pp. 503-512. Blackwell 10.1111/jfb.12300 <http://dx.doi.org/10.1111/jfb.12300>

Palavras-Chave #570 Life sciences; biology #590 Animals (Zoology)
Tipo

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion

PeerReviewed