Data/hora: 04/06/2024 00:51:19

Provedor de dados: 	5	
País: 	France	
Título: 	Détermination de l'âge et de la croissance de Buccinum undatum L. (Gasteropoda : Prosobranchia) à l'aide des isotopes stables de la coquille et de l'ornementation operculaire	
Autores: 	Santarelli, Leonardo; Gros, Philippe.	
Data: 	1985	
Ano: 	1985	
Palavras-chave: 	Analyse isotopique; Buccin; Structures annuelles; Croissance; Inférence statistique; Isotopie analysis; Whelk; Annual increments; Growth; Statistical inference.	
Resumo: 	This paper presents a simple method of individual age determination of the gastropod Buccinum undatum, based on the counting of operculum striae. The validation of this method is achieved by the use of several unrelated approaches. As a first step, oxygen stable isotopie analysis is used to check shell records of seasonal temperature fluctuations. We then establish a geometrie correspondence between simultaneously elaborated parts of the shell and the operculum, and show that the mean periodicity of operculum striae formation is annual. With the help of complementary data collected on the fishing grounds, and also of a biometrical study, it is further shown that the age criterion is marked during the warmer months of the year, between June and October. These results provide a powerful tool for analysing demographie structures of whelk's commercial catches. As a practical use, we estimate the parameters of the von Bertalanffy growth model, with special emphasis on constructing a confidence region according to the theory of nonlinear !east squares.	
Tipo: 	Text	
Idioma: 	Francês	
Identificador: 	http://archimer.ifremer.fr/doc/00112/22308/19982.pdf	
Editor: 	Gauthier-Villars	
Relação: 	http://archimer.ifremer.fr/doc/00112/22308/	
Formato: 	application/pdf	
Fonte: 	Oceanologica Acta (0399-1784) (Gauthier-Villars), 1985 , Vol. 8 , N. 2 , P. 221-229	
Fonte: 	Gauthier-Villars