Data/hora: 11/06/2024 09:04:13

Provedor de dados: 	20	
País: 	Belgium	
Título: 	Distribución de desovantes y estimación de variables reproductivas del efectivo norteño de merluza (Merluccius hubbsi) (35º'S-41º'S) durante mayo de 2009

Spawners distribution and estimates of the reproductive variables of the northern stock of Argentine hake (Merluccius hubbsi) (35º'S-41º'S) during May 2009	
Autores: 	Rodrigues, K.A.; Macchi, G.J.	
Data: 	2013-06-13	
Ano: 	2011	
Palavras-chave: 	Stocks; Spawning populations; Histology; Fecundity; Gadoid fisheries; Merluccius hubbsi; Marine environment.	
Resumo: 	Spawning and reproductive variables of the northern hake stock were analyzed using macroscopic and histologic gonad information derived from samples collected in May 2009. The study includes estimates of batch fecundity, spawning frequency, oocyte dry weight and size at first maturity. During May 2009 the reproductive activity of the northern hake stock took place mainly near the 50 m isobath, north of 37° S. Spawning occurred within a temperature range of 9 °C-15 °C that coincided with a bottom thermal front. Size at first maturity, much lower than that reported at the beginning of the 1980s, showed differences between males (27.16 cm TL) and females (32.84 cm TL). The reproductive frequency was estimated at one spawning every 13 days and mean batch fecundity (764,545 oocytes) resulted higher than in April 2003. Likewise, oocyte dry weight exceeded that of April 2003, which might be associated to the size composition of each reproductive group	
Tipo: 	Journal Contribution	
Idioma: 	Espanhol	
Identificador: 	INIDEP informe técnico (81), p. 1-14

0327-9642

http://hdl.handle.net/1834/4883	
Editor: 	INIDEP

Mar del Plata (Argentina)	
Formato: 	issue:81 p.14 pp	
Fonte: 	http://www.oceandocs.org/license