Relationships between fish length and otolith length for nine teleost fish species from the Mediterranean basin, Kerguelen Islands, and Pacific Ocean

• Main Authors: Morat, F., Bănaru, Daniela, Mérigot, B., Batjakas, I., Betoulle, S., Vignon, M., Lecomte-Finiger, R., Letourneur, F.
• Other Authors: Biologie et écologie tropicale et méditerranéenne 2007-2010 (BETM), Université de Perpignan Via Domitia (UPVD)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2008
• Subjects: Otolith size; Lutjanidae; Mullidae; Salmonidae; Serranidae; Soleidae; Fish size; geo; envir; Kerguelen; Kerguelen Islands; Pacific
• Online Access: https://hal.archives-ouvertes.fr/halsde-00344451

International audience The relationship between fish size and otolith size was established for nine species from different geographical areas, the Mediterranean basin, Kerguelen Islands and the tropical Pacific Ocean. For all species, a significant linear relationship was found between fish size and otolith size. However, the ‘lake ecotype' of the brown trout (Salmo trutta fario) from Kerguelen did not show such relationship, contrary to the two other ‘ecotypes' from rivers and mixed biotopes. The reasons for such a pattern remain unknown. For a given species, comparisons of slopes of the relationship and Y-coordinate at the origin revealed differences according to studied sites or individual fish size. This suggests an influence of environmental and/or ontogenetic factors on the parameters of the relationship between fish size and otolith size.