The fecundity of wild Irish Atlantic salmon Salmo salar L. and its application for stock assessment purposes

Eyto, Elvira de; White, Jonathan; Boylan, Paddy; Clarke, Brenton R.; Cotter, D.; Doherty, D.; Gargan, Patrick; Kennedy, Richard; McGinnity, P.; O’Maoiléidigh, N.; O’Higgins, Kealan

doi:10.1016/j.fishres.2014.11.017

Cited by 18 publications

(29 citation statements)

References 34 publications

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“…For both 1SW and 2SW, individual fecundity η a (eggs per female) is given as a function of w a via the model described by de Eyto et al. () for Irish Atlantic salmon sampled between 1992 and 2012 (Equation , Fig. S1), which is assumed to be representative for Scottish salmon:

{normalη}_{a} = e^{(7.45 + 0.28 w_{a})}

…”

Section: Methodsmentioning

confidence: 99%

Influence of body condition on the population dynamics of Atlantic salmon with consideration of the potential impact of sea lice

Susdorf

Salama

Lusseau

2017

Journal of Fish Diseases

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Atlantic salmon Salmo salar is an iconic species of high conservation and economic importance. At sea, individuals typically are subject to sea lice infestation, which can have detrimental effects on their host. Over recent decades, the body condition and marine survival in NE Atlantic stocks have generally decreased, reflected in fewer adults returning to rivers, which is partly attributable to sea lice. We developed a deterministic stage-structured population model to assess condition-mediated population dynamics resulting in changing fecundity, age at sexual maturation and marine survival rate. The model is parameterized using data from the North Esk system, north-east Scotland. Both constant and density-dependent juvenile survival rates are considered. We show that even small sea lice-mediated changes in mean body condition of MSW can cause substantial population declines, whereas 1SW condition is less influential. Density dependence alleviates the condition-mediated population effect. The resilience of the population to demographic perturbations declines as adult condition is reduced. Indirect demographic changes in salmonid life-history traits (e.g., body condition) are often considered unimportant for population trajectory. The model shows that Atlantic salmon population dynamics can be highly responsive to sea lice-mediated effects on adult body condition, thus highlighting the importance of non-lethal parasitic long-term effects.

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{normalη}_{a} = e^{(7.45 + 0.28 w_{a})}

…”

Section: Methodsmentioning

confidence: 99%

Influence of body condition on the population dynamics of Atlantic salmon with consideration of the potential impact of sea lice

Susdorf

Salama

Lusseau

2017

Journal of Fish Diseases

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“…Por ejemplo, hasta dos millones de salmón del Atlántico se estiman que escapan de las granjas de salmón cada año. Todos los híbridos (f1, f2 y retrocruces) de animales de la granja con peces silvestres muestran reducción de la supervivencia en comparación al salmón salvaje (de Eyto et al, 2015, Jackson et al, 2015. El hecho de tener una supervivencia global baja significa que esto se traduciría en el reclutamiento reducido en la población, en su adaptabilidad acumulativa y con ello llevando al vórtice de extinción a las poblaciones salvajes (Senanan et al, 2004) Eficacia biológica por hibridación y sus consecuencias en conservación…”

Section: Hibridación En Pisciculturaunclassified

Hibridización de silúridos: una alternativa para la piscicultura con alto riesgo para la conservación de las especies nativas

2016

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ResumenEl propósito de este artículo es analizar, desde una mirada crítica, el riesgo a que se ven expuestas ciertas especies de silú-ridos, sometidas a procesos de hibridación por razones estrictamente comerciales, incluyendo los efectos sobre el hábitat, la competencia y la erosión genética. Es fácil comprender que dichos procedimientos tendrán en el futuro serios efectos sobre los recursos hidrobiológicos, los servicios ecosistémicos y la seguridad alimentaria, los cuales sólo pueden ser medidos a través del tiempo y no de forma inmediata.Palabras clave: Acuicultura, fitness, erosión genética, peces nativos (recursos acuáticos). AbstractThe purpose of this article was to analyze, from a critical perspective, the risk that would be exposed some silurid species in captivity, subjected to hybridization processes for strictly commercial reasons, including habitat effects, competition and genetic erosion. It is easy to understand that these procedures will be in the future effects on aquatic resources, ecosystem services and food security, which can only be measured over time and not immediately.Keywords: Aquaculture, fitness, genetic erosion, native fish (aquatic resources). ResumoO objetivo deste artigo foi analisar, a partir de uma perspectiva crítica, o risco ao qual seriam expostas algumas espécies de silúridos em cativeiro, sujeitos a processos de hibridação por razões exclusivamente comerciais, incluindo os efeitos sobre

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“…Subsequent to Pope et al . (), studies of various stocks have shown both that the relationship between egg numbers and fish size may (Moffett et al ., ; O'Connell et al ., ) and may not vary among different years (de Eyto et al ., ). Pope et al .…”

Section: Introductionmentioning

confidence: 97%

“…The primary determinant of fecundity in salmon is female size with additional variation accounted for by life history and origin (Bacon et al ., ; Burton et al ., ; de Eyto et al ., ; Pope et al ., ; Reid & Chaput, ; Thorpe et al ., ). Anadromous salmonids display a large range of sizes at sexual maturity, related to developmental rates and growth conditions in freshwater and marine environments.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical analysis of wild Atlantic salmon (Salmo salar) fecundity in relation to body size and developmental traits

Hanson

Ounsley

Burton

et al. 2019

Journal of Fish Biology

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Using data from wild Atlantic salmon Salmo salar returning to spawn in seven Scottish rivers, we developed a model of fecundity based on individual body size and key developmental traits. We used a novel approach to model selection which maximises predictive accuracy for application to target river stocks to select the best from a suite of Bayesian hierarchical models. This approach aims to ensure the optimal model within the candidate set includes covariates that best predict out-of-sample data to estimate fecundity in areas where no direct observations are available. In addition to body size, the final model included the developmental characteristics of age at smolting and years spent at sea. Using two independent long-term monitoring datasets, the consequences of ignoring these characteristics was revealed by comparing predictions from the best model with models that omitted them.

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The fecundity of wild Irish Atlantic salmon Salmo salar L. and its application for stock assessment purposes

Cited by 18 publications

References 34 publications

Influence of body condition on the population dynamics of Atlantic salmon with consideration of the potential impact of sea lice

Influence of body condition on the population dynamics of Atlantic salmon with consideration of the potential impact of sea lice

Hibridización de silúridos: una alternativa para la piscicultura con alto riesgo para la conservación de las especies nativas

Hierarchical analysis of wild Atlantic salmon (Salmo salar) fecundity in relation to body size and developmental traits

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