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Incidental capture of Myliobatis goodei and Myliobatis ridens in artisanal fishing in southern Brazil

Published online by Cambridge University Press:  10 July 2017

Priscila Rocha Vasconcelos Araújo ,
Juliano César Marangoni  and
Gonzalo Velasco
Priscila Rocha Vasconcelos Araújo*
Affiliation:
Laboratório de Dinâmica de Populações Marinhas, Universidade Federal Rural de Pernambuco, Dois Irmãos, Recife, 52171-900, Pernambuco, PE, Brasil
Juliano César Marangoni
Affiliation:
Universidade Federal do Rio Grande, Instituto de Matemática, Estatística e Física, PO Box 474, 96201-900 Rio Grande, RS, Brasil
Gonzalo Velasco
Affiliation:
Laboratório de Recursos Pesqueiros Artesanais, Universidade Federal do Rio Grande, PO Box 474, 96201-900 Rio Grande, RS, Brasil
*
Correspondence should be addressed to: P.R.V. Araújo, Laboratório de Dinâmica de Populações Marinhas, Universidade Federal Rural de Pernambuco, Dois Irmãos, Recife, 52171-900, Pernambuco, PE, Brasil email: [email protected]
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Abstract

This study described the myliobatids caught in artisanal beach seine fisheries in southern Brazil. Fieldwork was carried out from spring 2012 to winter 2014 in Cassino Beach (Rio Grande, Brazil). Both retained and discarded specimens were identified to species level, and sex, maturity and disc width (DW in cm) were recorded. A total 359 specimens of Myliobatis spp. were recorded, of which 43.4% were from fishery discards, 31.5% from beach seine and 25.1% from drifting gill-net (‘lance de praia’, a fishery that has developed recently in the study area). Catches of myliobatids were higher in the spring and autumn. A total of 94 Myliobatis goodei (24 males, 69 females (eight pregnant) and one unsexed), and 179 Myliobatis ridens were recorded (24 males, 148 females (17 pregnant) and seven unsexed). Myliobatis goodei ranged in size from 45.0–65.0 cm DW (males) and 43.3–115.0 cm DW (females). Myliobatis ridens were 45.0–59.0 cm DW (males) and 41.2–98.0 cm DW (females). Both beach seine and gill-net fisheries operated in potential nursery areas for these myliobatid rays, as indicated by the proportionally high number of mature females (including pregnant females) and juveniles found in this study. The rays probably feed and give birth during the warmer seasons of the year (spring and summer) in these areas.

Keywords

artisanal fishingMyliobatidaefishing discardsbycatchsouthern Brazil
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 98 , Issue 7 , November 2018 , pp. 1793 - 1800
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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