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| Day, Louise; Le Bris, Hervé; Saulnier, Erwan; Pinsivy, Lucas; Brind'Amour, Anik. |
| Coastal and estuarine habitats function as nurseries for many commercial marine species. In these ecosystems, the hypothesis that food supply limits juvenile fish density and survival has been widely debated. Direct approaches that test this hypothesis in temperate soft-bottom nurseries are data-intensive as they rely on beam trawl to collect juvenile fish and grab or core to collect their prey within the macrobenthic community. Thus, application has often been limited to a few sampling stations and temporal snapshots. However, scientific beam trawl surveys, conducted periodically in nurseries, sample, besides juvenile fish, benthic invertebrates including potential prey species. Using data collected solely from beam trawl surveys, we tested whether food... |
| Tipo: Text |
Palavras-chave: Young-of-the-year fish; Macrobenthic production; Trawl; Grab; Bay of Biscay; Quantile regression. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00600/71239/69607.pdf |
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| Saulnier, Erwan. |
| Understanding the processes that regulate the abundance of wild populations is a primary goal in ecology, and a prerequisite for implementing effective conservation and management of exploited living resources. In many marine fish, there is strong evidence that density-dependent regulation occurs at the juvenile stage when numerous individuals concentrate in spatially-restricted coastal and estuarine nurseries. However, the underlying mechanisms remain poorly understood. In particular, whether competition for food limits fish growth and survival is still controversial. In this PhD thesis, we focused on the food limitation hypothesis for nursery-dependent marine fish, which states that food supply limits juvenile fish production and ultimately, recruitment... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00635/74716/74700.pdf |
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