Variación de los índices gonádico, de rendimiento muscular y de la glándula digestiva de Spondylus princeps (Gray, 1825) (Mollusca: Bivalvia) en Isla Cedros y Punta Eugenia, México

The variation of the gonadal, muscular yield and digestive gland indexes was studied in Spondylus princeps from Punta Eugenia and Isla Cedros, Mexico. Specimens were collected from March to July 1997 and from August to December 2003. Gonadal indexes from 2% to 4% suggest reproductive inactivity from...

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Autores principales:	Villalejo-Fuerte,Marcial, Tripp-Quezada,Arturo, García-Domínguez,Federico
Lenguaje:	Spanish / Castilian
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2005
Materias:	Spondylidae reproduction spawning period
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572005000100012
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spelling	oai:scielo:S0718-195720050001000122005-10-07Variación de los índices gonádico, de rendimiento muscular y de la glándula digestiva de Spondylus princeps (Gray, 1825) (Mollusca: Bivalvia) en Isla Cedros y Punta Eugenia, MéxicoVillalejo-Fuerte,MarcialTripp-Quezada,ArturoGarcía-Domínguez,Federico Spondylidae reproduction spawning period The variation of the gonadal, muscular yield and digestive gland indexes was studied in Spondylus princeps from Punta Eugenia and Isla Cedros, Mexico. Specimens were collected from March to July 1997 and from August to December 2003. Gonadal indexes from 2% to 4% suggest reproductive inactivity from March to May and from October to December. The sustained increase in the index from May to July suggests gonadal maturity (10% of the soft tissues weight in July); the index decreased from 10% to 2% from July to October, corresponding with the spawning period. The muscular yield index showed high values (45-50%) from March to June and diminished sustainedly until August, when the lowest value (37%) was attained. Muscular yield index recovered during September and October with values of 45% staying around 40% during November and December. The muscular yield suggests that during the gonadal maturity, the energy stored in the abductor muscle is not used until the spawning season. The digestive gland index showed the highest value in March and decreased lightly until June, indicating that the energetic substances stored in the digestive gland sustain together with the external food, the gonadal development from July up to September when a fast decrease of the index occurs, suggesting that reserve substances in the digestive gland and in the muscle are used during the spawning periodinfo:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.40 n.1 20052005-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572005000100012es10.4067/S0718-19572005000100012
institution	Scielo Chile
collection	Scielo Chile
language	Spanish / Castilian
topic	Spondylidae reproduction spawning period
spellingShingle	Spondylidae reproduction spawning period Villalejo-Fuerte,Marcial Tripp-Quezada,Arturo García-Domínguez,Federico Variación de los índices gonádico, de rendimiento muscular y de la glándula digestiva de Spondylus princeps (Gray, 1825) (Mollusca: Bivalvia) en Isla Cedros y Punta Eugenia, México
description	The variation of the gonadal, muscular yield and digestive gland indexes was studied in Spondylus princeps from Punta Eugenia and Isla Cedros, Mexico. Specimens were collected from March to July 1997 and from August to December 2003. Gonadal indexes from 2% to 4% suggest reproductive inactivity from March to May and from October to December. The sustained increase in the index from May to July suggests gonadal maturity (10% of the soft tissues weight in July); the index decreased from 10% to 2% from July to October, corresponding with the spawning period. The muscular yield index showed high values (45-50%) from March to June and diminished sustainedly until August, when the lowest value (37%) was attained. Muscular yield index recovered during September and October with values of 45% staying around 40% during November and December. The muscular yield suggests that during the gonadal maturity, the energy stored in the abductor muscle is not used until the spawning season. The digestive gland index showed the highest value in March and decreased lightly until June, indicating that the energetic substances stored in the digestive gland sustain together with the external food, the gonadal development from July up to September when a fast decrease of the index occurs, suggesting that reserve substances in the digestive gland and in the muscle are used during the spawning period
author	Villalejo-Fuerte,Marcial Tripp-Quezada,Arturo García-Domínguez,Federico
author_facet	Villalejo-Fuerte,Marcial Tripp-Quezada,Arturo García-Domínguez,Federico
author_sort	Villalejo-Fuerte,Marcial
title	Variación de los índices gonádico, de rendimiento muscular y de la glándula digestiva de Spondylus princeps (Gray, 1825) (Mollusca: Bivalvia) en Isla Cedros y Punta Eugenia, México
title_short	Variación de los índices gonádico, de rendimiento muscular y de la glándula digestiva de Spondylus princeps (Gray, 1825) (Mollusca: Bivalvia) en Isla Cedros y Punta Eugenia, México
title_full	Variación de los índices gonádico, de rendimiento muscular y de la glándula digestiva de Spondylus princeps (Gray, 1825) (Mollusca: Bivalvia) en Isla Cedros y Punta Eugenia, México
title_fullStr	Variación de los índices gonádico, de rendimiento muscular y de la glándula digestiva de Spondylus princeps (Gray, 1825) (Mollusca: Bivalvia) en Isla Cedros y Punta Eugenia, México
title_full_unstemmed	Variación de los índices gonádico, de rendimiento muscular y de la glándula digestiva de Spondylus princeps (Gray, 1825) (Mollusca: Bivalvia) en Isla Cedros y Punta Eugenia, México
title_sort	variación de los índices gonádico, de rendimiento muscular y de la glándula digestiva de spondylus princeps (gray, 1825) (mollusca: bivalvia) en isla cedros y punta eugenia, méxico
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572005000100012
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Variación de los índices gonádico, de rendimiento muscular y de la glándula digestiva de Spondylus princeps (Gray, 1825) (Mollusca: Bivalvia) en Isla Cedros y Punta Eugenia, México

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