A novel length back-calculation approach accounting for ontogenetic changes in the fish length – otolith size relationship during the early life of sprat (Sprattus sprattus)

Günther, Claudia C., Temming, Axel, Baumann, Hannes, Huwer, Bastian, Möllmann, Christian, Clemmesen, Catriona, Herrmann, Jens-Peter and Gillanders, Bronwyn (2012) A novel length back-calculation approach accounting for ontogenetic changes in the fish length – otolith size relationship during the early life of sprat (Sprattus sprattus) Canadian Journal of Fisheries and Aquatic Sciences, 69 (7). pp. 1214-1229. DOI 10.1139/f2012-054.

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Abstract

(Sprattus sprattus), accounting for ontogenetic changes in the relationship between fish length and otolith length. In sprat, metamorphosis from larvae to juveniles is characterized by the coincidence of low length growth, strong growth in body height, and maximal otolith growth. Consequently, the method identifies a point of metamorphosis for an individual as the otolith radius at maximum increment widths. By incorporating this information in our back-calculation method, estimated length growth for the early larval stage was more than 60% higher compared with the result of the biological intercept model. After minimal length growth during metamorphosis, we found the highest increase in length during the early juvenile stage. We thus located the strongest growth potential in the early juvenile stage, which is supposed to be critical in determining recruitment strength in Baltic sprat.

Document Type: Article
Keywords: Evolutionary Ecology of Marine Fishes; Ichthyology; Sprattus sprattus; Alkor;
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Evolutionary Ecology of Marine Fishes
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1139/f2012-054
ISSN: 0706-652X
Projects: Future Ocean
Date Deposited: 02 Jul 2012 13:28
Last Modified: 07 Sep 2016 12:02
URI: http://eprints.uni-kiel.de/id/eprint/14729

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