TY - JOUR
T1 - Selectividad de enmalle para la corvina (Micropogonias furnieri) del sureste y sur de Brasil
AU - Queirolo, Dante
AU - Pio, Vanessa Mafra
AU - Pezzuto, Paulo Ricardo
AU - Ávila-da-Silva, Antônio O.
AU - Haimovici, Manuel
AU - Cardoso, Luis Gustavo
N1 - Funding Information:
We are indebted to the Fishing Studies Group team and to the members of the Onboard Observer Program (GEP/UNIVALI) for collecting, processing and provi-ding us data from Santa Catarina fishing trips. CAPES (Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior-Ministry of Education-Brazil) funded this study (Edital Capes Ci?ncias do Mar 09/2009, AUXPE 1141/2010-IGEPESCA Project), and supported V.M.P. through a Ph.D. scholarship. P.R.P. coordinated the IGEPESCA/CAPES Project in Santa Catarina and was supported by a research grant from CNPq (Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico-Ministry of Science, Technology and Innovation-Brazil, Process 306904/2012-8). D.Q.P. thanks CONICYT (Comisi?n Nacional de Investiga-ci?n Cient?fica y Tecnol?gica, Ministerio de Educaci?n, Chile) for funding the FONDECYT N? 11130415 project to study the selectivity in fishing. We thank the anonymous referees and the editor for their helpful suggestions, constructive comments and critical reading of the submitted manuscript.
Publisher Copyright:
© 2016, Escuela de Ciencias del Mar. All rights reserved.
PY - 2016/11
Y1 - 2016/11
N2 - The whitemouth croaker is one of the most important demersal resources of southeast and southern Brazil, and it is caught mostly by bottom gillnets. This fishing system has the advantage of a unimodal distribution of size selectivity, where the optimum length corresponds to the mode of the distribution. This study is aimed to calculate the selection factor of gillnets from fishery studies and monitoring programs, and to estimate a generic curve that represents the retention size probability of the most commonly used mesh sizes for catching whitemouth croaker. Data on capture frequencies using 70, 90, 100, 110, 120, and 130 mm mesh were obtained from the states of São Paulo, Santa Catarina and Rio Grande do Sul between 1998 and 2012. The selection factor calculated corresponds to 3.73. Based on the general equation of retention size, we estimated a modal length of 261 mm for the 70 mm mesh, 336 mm for the 90 mm mesh, 373 mm for the 100 mm mesh, 411 mm for the 110 mm mesh, 448 mm for the 120 mm mesh and 485 mm for the 130 mm mesh. The modal lengths estimated in this study were consistent with previous estimations obtained by experimental approach. We discuss the appropriate mesh sizes with respect to the biology of the species, along with the possibility of considering gillnet selectivity to improve fishery catch.
AB - The whitemouth croaker is one of the most important demersal resources of southeast and southern Brazil, and it is caught mostly by bottom gillnets. This fishing system has the advantage of a unimodal distribution of size selectivity, where the optimum length corresponds to the mode of the distribution. This study is aimed to calculate the selection factor of gillnets from fishery studies and monitoring programs, and to estimate a generic curve that represents the retention size probability of the most commonly used mesh sizes for catching whitemouth croaker. Data on capture frequencies using 70, 90, 100, 110, 120, and 130 mm mesh were obtained from the states of São Paulo, Santa Catarina and Rio Grande do Sul between 1998 and 2012. The selection factor calculated corresponds to 3.73. Based on the general equation of retention size, we estimated a modal length of 261 mm for the 70 mm mesh, 336 mm for the 90 mm mesh, 373 mm for the 100 mm mesh, 411 mm for the 110 mm mesh, 448 mm for the 120 mm mesh and 485 mm for the 130 mm mesh. The modal lengths estimated in this study were consistent with previous estimations obtained by experimental approach. We discuss the appropriate mesh sizes with respect to the biology of the species, along with the possibility of considering gillnet selectivity to improve fishery catch.
KW - Brazil
KW - Fisheries
KW - Gillnet
KW - Micropogonias furnieri
KW - Selectivity
UR - http://www.scopus.com/inward/record.url?scp=85006355820&partnerID=8YFLogxK
U2 - 10.3856/vol44-issue5-fulltext-10
DO - 10.3856/vol44-issue5-fulltext-10
M3 - Article
AN - SCOPUS:85006355820
VL - 44
SP - 975
EP - 984
JO - Latin American Journal of Aquatic Research
JF - Latin American Journal of Aquatic Research
SN - 0718-560X
IS - 5
ER -