Artículo
Assessing the role of host traits as drivers of the abundance of long-lived parasites in fish-stock assessment studies
Fecha de publicación:
11/2016
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Journal of Fish Biology
ISSN:
0022-1112
e-ISSN:
1095-8649
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In order to identify the best tools for stock assessment studies using fish parasites as biological indicators, different host traits (size, mass and age and their interaction with sex) were evaluated as descriptors of cumulative patterns of both parasite abundance and infracommunity species richness. The effect of such variables was analysed for a sample of 265 specimens of Percophis brasiliensis caught in the Argentine Sea. The abundances and species richness were modelled using generalized linear mixed models (GLMMs) with negative binomial and Poisson distribution respectively. Due to collinearity, separate models were fitted for each of the three main explanatory variables (length, mass and age) to identify the optimal set of factors determining the parasite burdens. Optimal GLMMs were selected on the basis of the lowest Akaike information criteria, residual information and simulation studies based on 10 000 iterations. Results indicated that the covariates length and sex consistently appeared in the most parsimonious models suggesting that fish length seems to be a slightly better predictor than age or mass. The biological causes of these patterns are discussed. It is recommended to use fish length as a measure of growth and to restrict comparisons with fish of similar length or to incorporate length as covariate when comparing parasite burdens. Host sex should be also taken into account for those species sexually dimorphic in terms of morphology, behaviour or growth rates.
Palabras clave:
Age
,
Argentine Sea
,
Collinearity
,
Length
,
Parasite Tags
,
Percophis Brasiliensis
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Citación
Braicovich, Paola Elizabeth; Ieno, E. N.; Sáez, M.; Despos, J.; Timi, Juan Tomas; Assessing the role of host traits as drivers of the abundance of long-lived parasites in fish-stock assessment studies; Wiley Blackwell Publishing, Inc; Journal of Fish Biology; 89; 5; 11-2016; 2419-2433
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