How do environmental factors affect the stock–recruitment relationship? The case of the Pacific sardine (Sardinops sagax) of the northeastern Pacific Ocean

Galindo-Cortés, Gabriela; Anda-Montañez, Juan Antonio De; Arreguı́n-Sánchez, Francisco; Salas, Silvia; Balart, Eduardo F.

doi:10.1016/j.fishres.2009.11.010

Cited by 30 publications

(9 citation statements)

References 34 publications

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“…Stock‐recruitment models have attempted to explain this variability based on statistical correlations. These correlations were inferred from different drivers such as temperature (Lindegren & Checkley, ), oceanographic indices (PDO, NPGO and MEI, [Jacobson & MacCall, ; Galindo‐Cortes, De Anda‐Montanez, Arreguin‐Sanchez, Salas, & Balart, ; ]), variations in the spawning stock biomass of sardine and changes in the somatic condition of parents (Zwolinski & Demer, ). Despite several explanations, understanding the full array of climate‐induced effects on recruitment of Pacific sardine remains a topic of ongoing research.…”

Section: Introductionmentioning

confidence: 99%

Climate variability and sardine recruitment in the California Current: A mechanistic analysis of an ecosystem model

Politikos

Curchitser

Rose

et al. 2018

Fisheries Oceanography

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Recruitment varies substantially in small pelagic fish populations. Understanding of the mechanisms linking environment to recruitment is essential for the effective management of fisheries resources. In this study, we used a fully coupled end‐to‐end ecosystem model to study the effect of climate variability on sardine recruitment in the California Current System during 1965–2006. Ocean variability was represented by ROMS hydrodynamic and NEMURO biogeochemical models, and sardine population dynamics was simulated through a full life cycle individual‐based model. Model analysis was designed to elucidate how changes in abiotic and biotic conditions may impact the spawning habitats, early life stage survival, and ultimately recruitment of sardine. Our findings revealed the importance of spatial processes to shape early life stages dynamics. Shifts in spawning habitats were dictated by the spatial variations in temperature and the behavioral movement of adults. Additionally, the spatial match of eggs with warmer temperatures and larvae with their prey influenced their survival. The northward shifts in spawning locations and the accomplishment of good recruitment in warmer years agreed with existing knowledge. Egg production and survival during egg and yolk‐sac larval stages were key factors to drive the long‐term variations in recruitment. Finally, our analysis provided a quantitative assessment of climate impact on year‐to‐year variation in sardine recruitment by integrating multiple hypotheses.

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Section: Introductionmentioning

confidence: 99%

Climate variability and sardine recruitment in the California Current: A mechanistic analysis of an ecosystem model

Politikos

Curchitser

Rose

et al. 2018

Fisheries Oceanography

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“…Development of stock-recruitment-environment relationships for both invertebrate and finfish species has highlighted the variability and range of productivity within a single stock [14][15][16]. An illustrative example is provided in the self-regeneration model for North Sea cod (Gadus morhua) [16].…”

Section: Self-regenerating Stocks and The Limitations Of Enhancementmentioning

confidence: 99%

Commercial scale invertebrate fisheries enhancement in Australia: Experiences, challenges and opportunities

Hart

2015

Marine Policy

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“…To understand the complexity of natural patterns in tropical small-scale fisheries, it is necessary to take into account the nature and resolution of the environmental data: complex models require high quality data producing broad confidence intervals; by contrast, simple models present the advantage of low data requirement with low statistical error. These, however, can overlook some important processes, and may fail to consider the non-linear nature of the environment-ecosystem relationship [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Disentangling the complexity of tropical small-scale fisheries dynamics using supervised Self-Organizing Maps

2018

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Tropical small-scale fisheries are typical for providing complex multivariate data, due to their diversity in fishing techniques and highly diverse species composition. In this paper we used for the first time a supervised Self-Organizing Map (xyf-SOM), to recognize and understand the internal heterogeneity of a tropical marine small-scale fishery, using as model the fishery fleet of San Pedro port, Tabasco, Mexico. We used multivariate data from commercial logbooks, including the following four factors: fish species (47), gear types (bottom longline, vertical line+shark longline and vertical line), season (cold, warm), and inter-annual variation (2007–2012). The size of the xyf-SOM, a fundamental characteristic to improve its predictive quality, was optimized for the minimum distance between objects and the maximum prediction rate. The xyf-SOM successfully classified individual fishing trips in relation to the four factors included in the model. Prediction percentages were high (80–100%) for bottom longline and vertical line + shark longline, but lower prediction values were obtained for vertical line (51–74%) fishery. A confusion matrix indicated that classification errors occurred within the same fishing gear. Prediction rates were validated by generating confidence interval using bootstrap. The xyf-SOM showed that not all the fishing trips were targeting the most abundant species and the catch rates were not symmetrically distributed around the mean. Also, the species composition is not homogeneous among fishing trips. Despite the complexity of the data, the xyf-SOM proved to be an excellent tool to identify trends in complex scenarios, emphasizing the diverse and complex patterns that characterize tropical small scale-fishery fleets.

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How do environmental factors affect the stock–recruitment relationship? The case of the Pacific sardine (Sardinops sagax) of the northeastern Pacific Ocean

Cited by 30 publications

References 34 publications

Climate variability and sardine recruitment in the California Current: A mechanistic analysis of an ecosystem model

Climate variability and sardine recruitment in the California Current: A mechanistic analysis of an ecosystem model

Commercial scale invertebrate fisheries enhancement in Australia: Experiences, challenges and opportunities

Disentangling the complexity of tropical small-scale fisheries dynamics using supervised Self-Organizing Maps

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