Banca de DEFESA: MARCELO GOMES DE LIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : MARCELO GOMES DE LIRA
DATA : 27/10/2016
HORA: 14:00
LOCAL: Anfiteatro das Aves, Centro de Biociências, UFRN
TÍTULO:

TUNA FISHING AND RELATED IN ATLANTIC OCEAN: OCEANOGRAPHIC INTERACTIONS, SOCIOECONOMIC IMPLICATIONS AND TECHNOLOGICAL

PALAVRAS-CHAVES:

fishery; long line; tunas; Thunnus albacares; CPUE; fisheries oceanography, environmental variables.

PÁGINAS: 76
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

The ocean fishing generates food, job, and income and it is important due to Brazil’s proximity to the migratory routes of the tuna and other species of fish. In this way, studies that connect the distribution of the abundance and population structure of the fishing resources with the environmental variables and how these relations influence the space-time distribution, as well as in the attempt to better understand the dynamic and the fleet’s captures’ composition that operates with longline in the Atlantic, are essential for the establishment of measures that aim the sustainable exploration of these resources. The data of the fleet’s ladings, which was hosted in Rio Grande do Norte (RN), were analyzed. This state has been the main Brazilian exporter of tunas and alike from 2006 to 2016. Nearly 80 % of the catch in live weight were from Thunnus albacares, Thunnus obesus, Xiphias gladius e Prionace glauca. The crew’s wage, the fuel, the bait and the fishing material represent 65% of the production cost. Rio Grande do Norte has exported approximately 77% and 26% of, respectively, fresh and frozen T. albacares, 92% and 90% of, respectively, fresh and frozen T. obesus, and 55% and 95% of, respectively, fresh and frozen X. gladius. It was further analyzed of the distribution space-temporal of the T. albacares and its relations with the oceanographic characteristics of the Atlantic Ocean waters. For this study the longline fleet, which is hosted in the State of Rio Grande do Norte (Northeast of Brazil), data were used, as well as the sea surface temperature data (TSM), of chlorophyll (Chl-a), of the area within 42,2° and 24,8° W, and 5,9° S and 8,8° N, besides the lunar cycle data for the studied period. The methodology used to model the effect of the variables on the Catch per Unit of Effort (CPUE) and the length of the captured individuals was the method Generalized Linear Model (GLM). In all, 10,350 examples were analyzed, which corresponded to 482.95 t, captured between December/2007 and August/2015. The results have shown that the distribution, abundance and length structure of T. albacares are strongly connected with environmental variables (moon phases, TSM and Chlo - a), time-related (trimester and year) and spacial (latitude and longitude) and that the low proportion of adults in the total catch of T. albacares indicates the need for adoption of fisheries management measures for conservation of this stock.

MEMBROS DA BANCA:
Presidente - 1149351 - JORGE EDUARDO LINS OLIVEIRA
Externo à Instituição - JOSE GARCIA JUNIOR - IFRN
Interno - 1718747 - PRISCILA FABIANA MACEDO LOPES