Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)

Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)

In stock-recruitment relationships, spawning stock biomass (SSB) has traditionally been assumed to be equivalent to total egg production (TEP); however, in the last decade a number of studies have indicated the need to include more biological complexity in measures of reproductive potential and advo...

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Hauptverfasser: Pérez-Rodríguez, A, Morgan, MJ, Rideout, RM, Domínguez-Petit, R, Saborido-Rey, F
Format: info:eu-repo/semantics/article
Sprache:eng
Veröffentlicht: Iniversidad Autónoma de Baja California 2010
Online Zugang:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1785
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language eng
description In stock-recruitment relationships, spawning stock biomass (SSB) has traditionally been assumed to be equivalent to total egg production (TEP); however, in the last decade a number of studies have indicated the need to include more biological complexity in measures of reproductive potential and advocate the use of TEP instead of SSB. The relationship between fecundity and length is often used to estimate TEP. In that case, the equations used to estimate female spawning stock biomass (FSSB) and TEP only differ in the coefficients determining the fecundity and weight relationships with length. In the present paper, TEP and FSSB have been estimated for Flemish Cap cod (Gadus morhua) for the period from 1978 to 2008. Total egg production was calculated using six different fecundity-length relationships applied to the whole time series in each case. A greater difference between the allometric coefficient in the weight-length and fecundity-length relationships led to a lower correlation between FSSB and TEP. The TEP time series using higher fecundity allometric coefficients explained a greater proportion of recruitment variance. Despite this pattern, correlation between FSSB and TEP was always higher than 0.96. These results support the necessity of making annual estimates of potential fecundity and studying its relation not only to length but to other variables, such as fish condition, in order to really get an improvement of TEP over FSSB as a predictive variable in recruitment assessments. 
format info:eu-repo/semantics/article
author Pérez-Rodríguez, A
Morgan, MJ
Rideout, RM
Domínguez-Petit, R
Saborido-Rey, F
spellingShingle Pérez-Rodríguez, A
Morgan, MJ
Rideout, RM
Domínguez-Petit, R
Saborido-Rey, F
Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
author_facet Pérez-Rodríguez, A
Morgan, MJ
Rideout, RM
Domínguez-Petit, R
Saborido-Rey, F
author_sort Pérez-Rodríguez, A
title Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
title_short Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
title_full Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
title_fullStr Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
title_full_unstemmed Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
title_sort study of the relationship between total egg production, female spawning stock biomass, and recruitment of flemish cap cod (gadus morhua)
publisher Iniversidad Autónoma de Baja California
publishDate 2010
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1785
_version_ 1792609343583027200
spelling repositorioinstitucional-20.500.12930-74372023-05-09T14:30:48Z Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua) Estudio de la relación entre la producción total de huevos, la biomasa de hembras reproductoras y el reclutamiento del bacalao (Gadus morhua) de Flemish Cap Pérez-Rodríguez, A Morgan, MJ Rideout, RM Domínguez-Petit, R Saborido-Rey, F In stock-recruitment relationships, spawning stock biomass (SSB) has traditionally been assumed to be equivalent to total egg production (TEP); however, in the last decade a number of studies have indicated the need to include more biological complexity in measures of reproductive potential and advocate the use of TEP instead of SSB. The relationship between fecundity and length is often used to estimate TEP. In that case, the equations used to estimate female spawning stock biomass (FSSB) and TEP only differ in the coefficients determining the fecundity and weight relationships with length. In the present paper, TEP and FSSB have been estimated for Flemish Cap cod (Gadus morhua) for the period from 1978 to 2008. Total egg production was calculated using six different fecundity-length relationships applied to the whole time series in each case. A greater difference between the allometric coefficient in the weight-length and fecundity-length relationships led to a lower correlation between FSSB and TEP. The TEP time series using higher fecundity allometric coefficients explained a greater proportion of recruitment variance. Despite this pattern, correlation between FSSB and TEP was always higher than 0.96. These results support the necessity of making annual estimates of potential fecundity and studying its relation not only to length but to other variables, such as fish condition, in order to really get an improvement of TEP over FSSB as a predictive variable in recruitment assessments.  En los modelos de la relación población-reclutamiento, la biomasa de la población reproductora (SSB) se ha supuesto tradicionalmente como equivalente a la producción total de huevos (TEP); sin embargo, en la última década se han presentado una serie de estudios que apuntan a la necesidad de incluir una mayor complejidad biológica en las medidas de potencial reproductivo, abogando por el uso de TEP en lugar de SSB. Para estimar TEP se suele usar la relación entre la talla y la fecundidad. En este caso, las ecuaciones empleadas para estimar la biomasa de hembras reproductoras (FSSB) y TEP difieren sólo en los coeficientes que determinan la fecundidad y el peso en relación con la talla corporal de la hembra. En este estudio se estimaron TEP y FSSB del bacalao (Gadus morhua) en Flemish Cap en el periodo de 1978 a 2008. Se calculó TEP usando seis diferentes relaciones de talla y fecundidad aplicadas a toda la serie temporal. Una mayor diferencia entre los coeficientes alométricos de las relaciones talla-peso y talla-fecundidad resultó en una menor correlación entre FSSB y TEP. La serie temporal de TEP, usando el coeficiente alométrico más alto de la fecundidad, explicó una mayor proporción de la varianza del reclutamiento. A pesar de este patrón, la correlación entre FSSB y TEP fue siempre mayor que 0.96. Estos resultados apoyan la necesidad de obtener estimaciones anuales de la fecundidad potencial y estudiar su relación no sólo con la talla sino también con otras variables como la condición para obtener una mejora en la estimación de TEP como variable predictiva del reclutamiento. Palabras clave: potencial reproductivo, reclutamiento, fecundidad, maduración, proporción de sexos. 2010-12-08 2021-06-03T03:55:18Z 2021-06-03T03:55:18Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1785 10.7773/cm.v37i4B.1785 https://hdl.handle.net/20.500.12930/7437 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1785/1698 application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 37 No. 4B (2011); 675-687 Ciencias Marinas; Vol. 37 Núm. 4B (2011); 675-687 2395-9053 0185-3880

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