Variation in egg mass within two Atlantic herring Clupea harengus stocks.
J Fish Biol
; 95(2): 367-378, 2019 Aug.
Article
em En
| MEDLINE
| ID: mdl-30900244
ABSTRACT
The main objective of this study was to investigate if egg size (mass) at spawning is invariant for Scotia-Fundy summer and autumn (SFSH) and Icelandic summer (ISSH) spawning herring Clupea harengus. Oocyte dry mass measurements for SFSH females collected in 2001 and ISSH females collected in 1999 and 2000 showed a large variation. Difference in egg dry mass among fish was found to vary by as much as twofold in each stock. For ISSH, variation in egg mass was also apparent from oocyte volume measurements made jointly with a histological examination of the ovaries. Approximately 20% of the variation in egg mass could be explained by maternal whole-body mass or total length, indicating that length or age composition in the stocks can potentially influence the recruitment success. This implies that fisheries management strategies should aim to maintain a broad range in age composition.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Pesqueiros
/
Peixes
Tipo de estudo:
Prognostic_studies
Limite:
Animals
País como assunto:
America do norte
/
Europa
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article