Biologia reprodutiva do tubarão galha-branca oceânico, Carcharhinus longimanus, no Atlântico Sudoeste e Equatorial

Submitted by (edna.saturno@ufrpe.br) on 2017-02-17T13:31:07Z No. of bitstreams: 1 Mirna Regina dos Santos Tambourgi.pdf: 973009 bytes, checksum: e1b23c1d9979ea2656cba5d134038e44 (MD5) Made available in DSpace on 2017-02-17T13:31:07Z (GMT). No. of bitstreams: 1 Mirna Regina dos Santos Tambourgi.pdf: 973009 bytes, checksum: e1b23c1d9979ea2656cba5d134038e44 (MD5) Previous issue date: 2010-02-17 In the period from December 2003 to December 2009, the reproductive tract were collected from 201 individuals of Carcharhinus longimanus, caught by of commercial tuna boats in the fleet, who were pelagic longline fisheries and hand line in the area located between latitudes 06 º 45'N and 23 ° 36'S and longitudes 018 ° 44'W and 053 º 13'W. Among the 201 individuals captured, 98 were females (74.5 – 227 cm TL) and 103 were males (72 – 242 cm TL) with a sexual proportion males to females of 1:1. Females were categorized as immature (N = 78; 74.5 – 170 cm TL), matures (N = 13; 165 – 223 cm TL), pré-ovulatory (N = 2; 181 – 187 cm CT) and pregnant (N = 5; 169 – 227 cm TL). The uterine fecundity ranged from 1 to 10 embryos. The cycle of pregnancy is annual with birth occurring at the end / beginning of the year. The size at first maturity of females was estimated at 170 cm TL. Of the 103 males captured, 75 were immature (72 to 160 cm TL), 8 maturing (170 - 196) and 20 were mature (160 - 242 cm TL). The size of sexual maturity was between 160 and 170 cm. No período de dezembro de 2003 a dezembro de 2009, foram coletados os aparelhos reprodutores de 201 espécimes de Carcharhinus longimanus, capturados por meio de barcos da frota comercial atuneira, que realizaram pescarias com espinhel pelágico e linha de mão, na área localizada entre as latitudes 06º45’N e 23º36’S e as longitudes de 018º44’W e 053º13’W. Deste total, 98 eram fêmeas (74,5 a 170 cm CT), maduras (N= 13; 165 a 223 cm CT), pré-ovulatórias (N= 2; 181 e 187 cm CT) e prenhes (N= 5; 169 a 227 cm CT). A fecundidade ovariana variou de 1 a 10 folículos vitelogênicos e a uterina, de 1 a 10 embriões. O ciclo de gestação é anual com nascimento ocorrendo ao final/início do ano. O tamanho de primeira maturação das fêmeas desta espécie é de 170 cm CT. Dos 103 machos capturados, 75 eram imaturos (72 – 160 cm CT), 8 em maturação (170 - 196) e 20 eram maduros (160 – 242 cm CT). O tamanho de primeira maturação sexual entre 160 e 170 cm.