Banca de DEFESA: WESLEY DUARTE DE SOUZA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : WESLEY DUARTE DE SOUZA
DATE: 28/04/2022
TIME: 09:00
LOCAL: on-line
TITLE:
KEY WORDS:
PAGES: 57
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Zoologia Aplicada
SUMMARY:

Recreational fishery is a sport and leisure activity, practiced by a large number of people around the world, without the objective of commercializing the catches. In recent decades, this practice has shown a significant increase, especially in urban centers of developing countries. Despite the sporting characteristics, this modality can affect different populations of marine fish, especially in coastal environments used as breeding and growth areas. The lack of information on species composition and volume of catches, especially in coastal environments, represents an important gap to be filled. In this context, this work aims to investigate the composition of species captured by recreational fishing developed in Sepetiba Bay (RJ), one of the most important coastal environments in southeastern Brazil. Primary data, from capture records, were obtained from a program of systematic monitoring of fisheries carried out with small and medium-sized boats, in addition to kayaks, between October 2019 and September 2020. Were recorded 1,190 fisheries (85 boats and 77 anglers). The total volume of fish caught was 63,479.7 kg in 12,268 hours of fishing, generating a fishing yield (CPUE) of 53.3 kg/trip, 7.1 kg/fisher and 5.2 kg/hour. Were recorded 52 categories of species in 42 fishing grounds. The most frequent species were corvina – Micropogonias furnieri (45.0%), robalo-peva – Centropomus parallelus (26.9%), bagre – Cathorops spixii and Genidens genidens (17.6%), cocoroca – Orthopristis ruber, Haemulon steindachneri and Haemulopsis corvinaeformis (16.7%), espada – Trichiurus lepturus (14.7%) and peroá – Balistes capriscus (11.6%). The most important species in terms of capture volume were T. lepturus (23.4%), B. capriscus (13.8%), olho-de-cão – Priacanthus arenatus (10.0%), M. furnieri (9.2%), dourado – Coryphaena hippurus (6.6%) and pargo – Pagrus pagrus (5.7%). The species with the highest frequency of release were C. spixii and G. genidens (58.9%), cação-viola – Pseudobatos percellens (55.6%) and baiacú – Chilomycterus spinosus (53.6%). The captures carried out in kayaks were essentially concentrated in the inner zone and on the robalo-flecha (C. undecimalis). The greatest richness of species, as well as the greatest number of fisheries (47.3%) were registered in the outer zone of the bay. More than half of the captures were carried out in points with a rocky bottom and those with natural baits (shrimp and sardines). The main seasons for the largest number of fishing were spring (27.9%) and winter (27.8%). Apparent seasonal patterns of fishing yield were verified for oceanic species (P. arenatus, P. pagrus and C. hippurus), mainly during autumn and winter. The maximum weight variations of the species indicated seasonality trends for M. furmieri, P. saltatrix and T. lepturus. Despite the captures accessing a wide variety of species, the variations registered determine an evident spatio-temporal differentiation pattern. The identification of species composition in catches and the recognition of variation patterns in space and time constitute fundamental information for the assessment of possible impacts on fish populations and contribute to the construction of a more comprehensive scenario from an ecosystem point of view.

BANKING MEMBERS:
Externa à Instituição - KÁTIA DE MEIRELLES FELIZOLA FREIRE - UFS
Externo à Instituição - ACACIO RIBEIRO GOMES TOMAS
Interno - 2143107 - LEONARDO MITRANO NEVES
Externa ao Programa - 024.861.557-24 - MAGDA FERNANDES DE ANDRADE TUBINO - UFRRJ
Interno - 1341945 - RAFAEL DE ALMEIDA TUBINO