Angling sport fishing in Lobo-Broa reservoir (Itirapina, SP, Brazil)

Abstract

The objective of this paper was to study angling from September, 2002 to September, 2004 in the Lobo-Broa Reservoir, Itirapina, SP (22° 15' S and 47° 49' W). Interviews (total 1,027) with sport fishers were accomplished in the three main fishing sites (Horto, Píer and Praia). This fishing was practiced with a simple fishing rod and reel, mainly in Horto, where the catches and fishing effort were higher. The catches were mainly composed of Cichlidae (Geophagus brasiliensis, Oreochromis niloticus, Tilapia rendalli and Cichla monoculus). We tried to determine which factors (fishing sites, type of baits and season) and the covariate fishing effort, expressed in number of fishing rods multiplied by fishing time, would affect catches, using a 3 way-ANCOVA. The final model showed that only fishing sites and effort determined the captures of sporting fishing in the reservoir. Some measures for managing fishing practices are discussed.Keywords: sport fishing, cpue, ANCOVA, reservoir fishing management. As pescarias esportivas no reservatório Lobo-Broa (Itirapina, SP, Brasil)Resumo O objetivo deste trabalho foi estudar as pescarias esportivas, entre setembro de 2002 e setembro de 2004 na Represa do Lobo-Broa, Itirapina, SP (22° 15' S e 47° 49' W). Foram realizadas 1.027 entrevistas junto aos pescadores esportivos nos três principais locais (Horto, Píer e Praia). Estas pescarias foram praticadas com vara de pescar simples e com molinete, principalmente no Horto, onde as capturas e esforço pesqueiro foram maiores. A captura foi composta principalmente de Ciclídeos (Geophagus brasiliensis, Oreochromis niloticus, Tilapia rendalli e Cichla monoculus). Buscou-se detectar que fatores (locais de pescarias, tipos de isca e sazonalidade) e se a covariável esforço de pesca, expresso em termos de número de varas de pesca multiplicado pelo tempo de pesca, afetavam as capturas, usando uma ANCOVA trifatorial. O modelo final mostrou que apenas os locais de pesca e o esforço de pesca determinaram as capturas das pescarias esportivas na represa. Algumas medidas de manejo para as pescarias foram discutidas.Palavras-chave: pescarias esportivas, cpue, ANCOVA, manejo de recursos pesqueiros.

Ecosystem Services of UHE Carlos Botelho (Lobo/Broa): a new approach for management and planning of dams multiple-uses

“…Property value was estimated at USD 3,211,168.21 per year as productive use value, based on Vergara (1996). Fishing value (Pereira et al, 2008) was estimated at USD 14,904.00 per year, as consumption use value. Employment value was estimated considering costs of maintenance of 85 employees (Vergara, 1996) totalling USD 587,862.55 per year.…”

“…(2) Precipitation extremes, which determine the quantity of water stored and directly influence hydroelectric generation, flood prevention and water quality. (3) The introduction of allochtonous fish species and consequent elimination of other fish species is known to be the cause of low frequency of fishermen in this reservoir (Pereira et al, 2008). (4) Spatial heterogeneity also influences water quality and quantity along the hydrographic basin, reservoir and wetlands.…”

“…Several studies in this reservoir have registered the presence of many flora and fauna aquatic species, ranging from phytoplankton, zooplankton and other invertebrates to macrophytes and fishes (Peláez-Rodriguez and Matsumura- Tundisi, 2002;Pereira et. al, 2008;Dellelo, 2008;Luzia, 2009).…”

Artisanal fisheries in a Brazilian hypereutrophic reservoir: Barra Bonita reservoir, middle Tietê river

“…An analysis of covariance (ANCOVA), a statistical method that combines regression analysis with analysis of variance (Quinn and Keough, 2002), was performed on the catch (response variable) and effort data looking for possible factors affecting the catch (Pereira et al, 2008). In order to balance the model and reduce environmental noise (Petrere Junior, 1978), data were grouped by season, fishing location, and fishing technique (factors).…”

Status of Recreational Fisheries in India: Development, Issues, and Opportunities

“…Further, while collaboration between recreational fishers and local stakeholders has led to a number of conservation successes, including for initiatives targeting threatened and endangered species (Arlinghaus et al, 2002;Fernandes et al, 2005;Arlinghaus, 2006;Granek et al, 2008;Pereira et al, 2008;Cowx et al, 2010), impacts resulting from recreational fisheries are species-specific and successful outcomes require research and management investments. Unfortunately, a divide between policy makers and anglers in countries such as India has hindered such investments (Pinder and Raghavan, 2013) and underscores the importance of better understanding the sector to inform its responsible development.…”