Добірка наукової літератури з теми "Pêche sportive – Effets de l'eutrophisation"
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Статті в журналах з теми "Pêche sportive – Effets de l'eutrophisation":
Power, Geoffrey, and Roger Le Jeune. "Le potentiel de pêche du Nouveau-Québec." Cahiers de géographie du Québec 20, no. 50 (April 12, 2005): 409–28. http://dx.doi.org/10.7202/021328ar.
Grondin, Jacques, Dany Laverdière, and Richard LaRue. "L’évaluation pré/post des effets de la communication du risque sur la perception du risque : l'exemple de la pêche sportive dans le Saint-Laurent autour de Montréal." VertigO, Volume 4 Numéro 1 (May 1, 2003). http://dx.doi.org/10.4000/vertigo.4704.
Дисертації з теми "Pêche sportive – Effets de l'eutrophisation":
Imbert, Alexis. "Pêche récréative et fonctionnement des lacs : conséquences des pratiques d'amorçage et aide à la gestion opérationnelle." Electronic Thesis or Diss., Toulouse 3, 2023. http://www.theses.fr/2023TOU30239.
Terrestrial subsidies to aquatic ecosystem have a strong impact on their functioning. In addition to natural subsidies, human activities also generates allochthonous inputs. Recreational fishing, through groundbaiting practices, which consists in introducing organic matter to optimise fish harvest, generates human subsidies which properties and impact on aquatic ecosystem are poorly known, despite their potential implication on lake eutrophication. This study aimed to determine the composition and properties of angling bait subsidies in order to quantify their consumption by fish, to assess impacts on water quality and to propose groundbaiting management measures. In the first chapter, the analyses of stoichiometric composition of four angling bait types revealed a high level of nitrogen and phosphorus, variable according type, which phosphorus contents up to 17 times higher than those observed in natural subsidies (tree litter). In the second chapter, the microplastic concentration was quantified. Two of the three angling bait types analysed contained microplastics, with an average concentration of 17.4 particles.kg-1. Through the analysis of stable isotope values, the third chapter highlighted a contrasted angling bait consumption by cyprinid fishes in gravel pit lakes supporting different fishery types. Some individuals used angling baits as their major energy source, accounting for up to 80.5 % of the resources consumed. In the fourth chapter, a field survey coupled with a questionnaire to anglers allowed to assess a strong seasonality in the angling bait quantities used according to fishing technique practiced. Specialised carp anglers used in average 4.6 kg of angling baits per day. Associated to a strong summer input, these introduced quantities generated an important eutrophication, modelled with a numerical lake model functioning. This model also identified the limitation of individual amount of baits as the most efficient groundbaiting management measure, which allowed to drastically reduce the total phosphorus and chlorophyll-a concentrations. This work allowed to identify angling bait as a subsidy with qualitative, quantitative and temporal properties highly variables which modulate the impact on ecosystems. In some cases, angling bait subsidies lead to a substantial water quality degradation, which justifies the need to set up some groundbaiting
Guillerault, Nicolas. "Effets des mesures de gestion halieutique sur la conservation d'une espèce vulnérable : le brochet (Esox lucius)." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30358/document.
The objective of this PhD was to determine the relevance of stocking for pike (Esox lucius) recreational fisheries management. First, we identified benefits (for recreation) and risks (for conservation) of stocking of pike through a bibliographic review. Second, we used a large dataset (96 sites, 6 years) to evaluate the actual and potential effects of stocking on pike populations. We found that pike stocking programs actually positively affect pike occurrences but not pike abundance despite we found that the effect of stocking on pike abundance increases with the size of the stocked pike. Third, we measured the genetic impact of stocking. We found a high rate of hybridization among juveniles but a moderate rate of hybridization among adult pike. Overall, stocking has good potential to enhance fisheries yet it carries conservation risks. We conclude with recommendations for the use of stocking and discussion about alternative management strategies
Книги з теми "Pêche sportive – Effets de l'eutrophisation":
1952-, Scheuhammer Anton Michael, and Service canadien de la faune., eds. Les pesées et les turluttes de plomb au Canada: Examen de leur utilisation et de leurs effets toxiques sur les espèces sauvages. Ottawa, Ont: Service canadien de la faune, 2003.