Reproductive biology of the deep-sea asteroid Henricia abyssicola from the NE Atlantic Ocean

Reproductive biology of the deep-sea asteroid Henricia abyssicola from the NE Atlantic Ocean

The reproductive biology of the North Atlantic asteroid Henricia abyssicola is determined in time series samples taken from 1250 to 1900 m depth in the Porcupine Seabight (NE Atlantic). The male-female ratio, gonadosomatic index (GI), pyloric caecum index (PCI), fecundity and oocyte size distributio...

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Autores principales: Benítez-Villalobos, F, Díaz-Martínez, JP, Tyler, PA
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2007
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/329
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spelling oai:cienciasmarinas.com.mx:article-3292019-04-03T18:37:48Z Reproductive biology of the deep-sea asteroid Henricia abyssicola from the NE Atlantic Ocean Biología reproductiva del asteroideo de mar profundo Henricia abyssicola en el Atlántico NE Benítez-Villalobos, F Díaz-Martínez, JP Tyler, PA marine invertebrate reproduction Asteroidea echinoderm biology deep-sea biology NE Atlantic reproducción en invertebrados marinos Asteroidea biología de equinodermos biología en mar profundo Atlántico NE The reproductive biology of the North Atlantic asteroid Henricia abyssicola is determined in time series samples taken from 1250 to 1900 m depth in the Porcupine Seabight (NE Atlantic). The male-female ratio, gonadosomatic index (GI), pyloric caecum index (PCI), fecundity and oocyte size distribution were determined and the results were corroborated by histological examination of the gonads. This species is a gonochoric asteroid and the male-female ratio did not differ significantly from the equality. Oogenesis was asynchronous. The previtellogenic oocytes grow to a size of ~230 µm before undergoing vitellogenesis. Maximum oocyte size was ~970 µm. The ovary volume was mainly occupied by large vitellogenic oocytes (400–500 µm) at any time. There were no seasonal variations in GI, PCI and fecundity. There were, however, variations in the production of vitellogenic oocytes of H. abyssicola superimposed on the continuous reproduction. We suggest that H. abyssicola makes use of the energy source provided by the deposition of phytodetritus by storing it in the developing oocytes and that it might have the benefit of a facultative planktotrophic larva. Se determinó la biología reproductiva del asteroideo del Atlántico Norte Henricia abyssicola a partir de series de tiempos de muestras tomadas entre 1250 y 1900 m de profundidad en la Ensenada Marina Porcupine (Atlántico NE). Se determinaron la proporción de machos y hembras, el índice gonadosomático (IG), el índice de ciego pilórico (ICP), la fecundidad y la distribución de tallas de huevo y los resultados se corroboraron mediante examen histológico de las gónadas. Henricia abyssicola es un asteroideo gonocórico y la proporción de machos y hembras no difiere significativamente de la igualdad. La oogénesis es asincrónica. Los oocitos previtelogénicos crecen a una talla de ~230 µm antes de comenzar la vitelogénesis. La talla máxima de oocitos fue ~970 µm. El volumen del ovario se encuentra principalmente ocupado por oocitos vitelogénicos grandes (400–500 µm) en cualquier tiempo. No hubo variación estacional en los valores de IG, ICP y fecundidad; sin embargo, hubo variaciones en la producción de oocitos vitelogénicos de H. abyssicola sobrepuesta en la reproducción continua. Se propone que H. abyssicola hace uso de la fuente de energía proporcionada por la deposición de fitodetritus almacenándola en los oocitos en desarrollo y podría tener el beneficio de una larva planctotrófica facultativa. Iniversidad Autónoma de Baja California 2007-03-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/329 10.7773/cm.v33i1.329 Ciencias Marinas; Vol. 33 No. 1 (2007); 49-58 Ciencias Marinas; Vol. 33 Núm. 1 (2007); 49-58 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/329/1886
institution Ciencias Marinas
collection OJS
language eng
format Online
author Benítez-Villalobos, F
Díaz-Martínez, JP
Tyler, PA
spellingShingle Benítez-Villalobos, F
Díaz-Martínez, JP
Tyler, PA
Reproductive biology of the deep-sea asteroid Henricia abyssicola from the NE Atlantic Ocean
author_facet Benítez-Villalobos, F
Díaz-Martínez, JP
Tyler, PA
author_sort Benítez-Villalobos, F
title Reproductive biology of the deep-sea asteroid Henricia abyssicola from the NE Atlantic Ocean
title_short Reproductive biology of the deep-sea asteroid Henricia abyssicola from the NE Atlantic Ocean
title_full Reproductive biology of the deep-sea asteroid Henricia abyssicola from the NE Atlantic Ocean
title_fullStr Reproductive biology of the deep-sea asteroid Henricia abyssicola from the NE Atlantic Ocean
title_full_unstemmed Reproductive biology of the deep-sea asteroid Henricia abyssicola from the NE Atlantic Ocean
title_sort reproductive biology of the deep-sea asteroid henricia abyssicola from the ne atlantic ocean
description The reproductive biology of the North Atlantic asteroid Henricia abyssicola is determined in time series samples taken from 1250 to 1900 m depth in the Porcupine Seabight (NE Atlantic). The male-female ratio, gonadosomatic index (GI), pyloric caecum index (PCI), fecundity and oocyte size distribution were determined and the results were corroborated by histological examination of the gonads. This species is a gonochoric asteroid and the male-female ratio did not differ significantly from the equality. Oogenesis was asynchronous. The previtellogenic oocytes grow to a size of ~230 µm before undergoing vitellogenesis. Maximum oocyte size was ~970 µm. The ovary volume was mainly occupied by large vitellogenic oocytes (400–500 µm) at any time. There were no seasonal variations in GI, PCI and fecundity. There were, however, variations in the production of vitellogenic oocytes of H. abyssicola superimposed on the continuous reproduction. We suggest that H. abyssicola makes use of the energy source provided by the deposition of phytodetritus by storing it in the developing oocytes and that it might have the benefit of a facultative planktotrophic larva.
publisher Iniversidad Autónoma de Baja California
publishDate 2007
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/329
_version_ 1715723955927515136

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