The effects of age-at-maturation on the parameters of a biphasic Lester growth model in Sander lucioperca

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Lappalainen , J , Malinen , T & Vinni , M 2021 , ' The effects of age-at-maturation on the parameters of a biphasic Lester growth model in Sander lucioperca ' , Annales Zoologici Fennici , vol. 58 , no. 1-3 , pp. 13-29 . https://doi.org/10.5735/086.058.0102

Title: The effects of age-at-maturation on the parameters of a biphasic Lester growth model in Sander lucioperca
Author: Lappalainen, Jyrki; Malinen, Tommi; Vinni, Mika
Contributor organization: Ecosystems and Environment Research Programme
Helsinki Institute of Sustainability Science (HELSUS)
Lammi Biological Station
Biological stations
Date: 2021
Language: eng
Number of pages: 17
Belongs to series: Annales Zoologici Fennici
ISSN: 0003-455X
DOI: https://doi.org/10.5735/086.058.0102
URI: http://hdl.handle.net/10138/328069
Abstract: An accurate estimation of growth is crucial for any fish species that is a target in fishery. We applied a biphasic Lester model for pikeperch (Sander lucioperca) population that is a slow-growing one. In this model, age at maturity divide the growth into immature and matuire phases. Logistic regression models showed that both age and length were significant in males and females when using maturity as a dependent variable, and both of these variables differed between sexes. To estimate how the changes in used age at maturity affect the Lester model parameters, the effects of ages from 10% to 90% probability of maturity were analysed. The gonadosomatic index of males (max. 2%) and females (max. 8.6%) was used to select Lester models that also gave low estimates for the investments in reproduction (g). Low g values were found in the Lester models for ages from 60% to 90% probability of maturity in males, and from 30% to 70% in females.An accurate estimation of growth is crucial for any fish species that is a target in fishery. We applied a biphasic Lester model for pikeperch (Sander lucioperca) population that is a slow-growing one. In this model, age at maturity divide the growth into immature and matuire phases. Logistic regression models showed that both age and length were significant in males and females when using maturity as a dependent variable, and both of these variables differed between sexes. To estimate how the changes in used age at maturity affect the Lester model parameters, the effects of ages from 10% to 90% probability of maturity were analysed. The gonadosomatic index of males (max. 2%) and females (max. 8.6%) was used to select Lester models that also gave low estimates for the investments in reproduction (g). Low g values were found in the Lester models for ages from 60% to 90% probability of maturity in males, and from 30% to 70% in females.
Subject: SOMATIC GROWTH
PIKEPERCH
SIZE
MATURITY
COST
L.
REPRODUCTION
REGRESSION
BIOLOGY
TRAITS
1181 Ecology, evolutionary biology
Peer reviewed: Yes
Usage restriction: openAccess
Self-archived version: publishedVersion


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