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| Registros recuperados: 12 | |
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| Tagliarolo, Morgana; Porri, F; Garvie, C D; Lechman, K; Scharler, U M. |
| Zooplankton community composition, biomass and metabolism can vary drastically over space and time in subtropical estuaries. Changing environmental conditions can affect communities differently, depending on the characteristics of the species involved. In the present study, we compared the rates of oxygen consumption of the dominant zooplankton taxa living in permanently open and in temporally open/closed estuaries. The metabolic response was tested at four temperatures experienced by the animals in their natural environment. Zooplankton from the temporally open/closed estuary showed low activation energies and low rate of metabolism at the highest temperature tested. Animals from the permanently open estuary had higher respiration rates at increased... |
| Tipo: Text |
Palavras-chave: Metabolism; Zooplankton; Respiration; Estuary; Thermal sensitivity. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00513/62425/66904.pdf |
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| Tagliarolo, Morgana. |
| En 2018, 1542 tonnes de vivaneaux éviscérés ont été débarquées en Guyane, dont 96% de vivaneau rouge (1480 tonnes). L’évaluation réalisée, porte uniquement sur L. purpureus qui constitue l’espèce cible, la plus abondante dans les débarquements. Le stock est évalué en utilisant un modèle de dynamique de population de type SS3 (Stock Synthesis). Les résultats pour l’année 2018 montrent que Fmsy est supérieur F et la biomasse est inférieure à Bmsy indiquant une surexploitation du stock. De plus, les captures de vivaneau rouge en Guyane sont largement constituées de juvéniles de moins de 4 ans. Il apparaît donc indispensable d’adopter des outils réglementaires permettant de réduire la mortalité par pêche des juvéniles. |
| Tipo: Text |
Palavras-chave: Vivaneau rouge; Evaluation du stock; Guyane. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00594/70658/79180.pdf |
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| Kankondi, Sebbi L.; Mcquaid, Christopher D.; Tagliarolo, Morgana. |
| Predicting ecological responses to climate change requires an understanding of the mechanisms that influence species' tolerances to temperature. Based on the idea that air and water breathing animals are differentially suited to life in either medium due to differences in their respiratory morphology, we examined the possibility that the thermal tolerances of coexisting intertidal pulmonate and patellogastropod limpets may differ in different breathing media. We tested this by determining each species' median lethal temperature (LT50) and cardiac Arrhenius breakpoint temperature (ABT) as measures of upper thermal tolerance limits, in air and water. Although all these species can survive in air and water, we hypothesised that the pulmonate limpets,... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00454/56602/58263.pdf |
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| Le Joncour, Anna; Blanchard, Fabian; Tagliarolo, Morgana. |
| Estuarine and coastal areas are often considered as hotspots due to their high diversity and ecological importance. However, communities living on those areas are often submitted to fishery and climate change pressures causing modifications on fish assemblages. French Guiana’s coastal shelf is characterised by warm waters with high turbidity and low salinity caused by the large river discharges from the Amazon and nearby estuaries. The high productivity of these areas supports fisheries and aquaculture activities. However, the structure and dynamics of coastal fish populations in French Guiana have seldom been studied. The aim of this study was to understand the effect of environmental conditions, as well as the influence of the coast and nearby estuaries... |
| Tipo: Text |
Palavras-chave: French Guiana; Coastal community; Estuary; Diversity; Tropical waters; Fisheries management. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00607/71929/73534.pdf |
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| Monaco, Cristian; Porporato, Erika M. D.; Lathlean, Justin A.; Tagliarolo, Morgana; Sara, Gianluca; Mcquaid, Christopher D.. |
| Individual-based models are increasingly used by marine ecologists to predict species responses to environmental change on a mechanistic basis. Dynamic Energy Budget (DEB) models allow the simulation of physiological processes (maintenance, growth, reproduction) in response to variability in environmental drivers. High levels of computational capacity and remote-sensing technologies provide an opportunity to apply existing DEB models across global spatial scales. To do so, however, we must first test the assumption of stationarity, i.e., that parameter values estimated for populations in one location/time are valid for populations elsewhere. Using a validated DEB model parameterized for the cosmopolitan intertidal mussel Mytilus galloprovincialis, we ran... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00475/58679/61303.pdf |
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| Registros recuperados: 12 | |
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