Data/hora: 11/06/2024 05:41:30

Provedor de dados: | 5
País: | France
Título: | Observations sur la maturité sexuelle et la ponte du tourteau Cancer pagurus en Manche
Autores: | Latrouite, Daniel; Noel, Philippe.
Data: | 1993
Ano: | 1993
Palavras-chave: | Spawning; Sexual maturity; Reproduction; Channel; Cancer pagurus; Edible crab; Reproduction; Ponte; Manche; Tourteau; Maturité sexuelle; Cancer pagurus.
Resumo: | Few observations have been reported on the reproductive cycle and size at maturity of female edible crab in the Channel. This could be linked to non catchability of berried females. During the present study carried over three different years, females were taken from commercial catches prior to the spawning period and placed in tanks in the laboratory. The various criteria used to establish the mean size at first maturity are discussed and the relation between size and functional maturity is described. The smallest berried females are at a carapace length of 76mm, and maximum values are reached at about 105mm. The mean value is between 85 and 90mm carapace length. The duration of the spawning period was the same in each years, extending from mid-November to the beginning of January. It is compared with the seasonal evolution of CPUE calculated from logbooks provided by Channel potters. The time elapsed between moulting and spawning is assessed using the ratio 228Th/228Ra derived from samples of the carapace. In 17 out of 20 cases, moulting and spawning occured in the same year, sometimes separated by no more than three months, but in the three other cases the delay between moulting and spawning was one year.
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/1993/acte-1420.pdf
Editor: | ICES C.MC 1993/K:23
Relação: | http://archimer.ifremer.fr/doc/00000/1420/
Formato: | application/pdf