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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
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 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 ?m before undergoing vitellogenesis. Maximum oocyte size was ~970 ?m. The ovary volume was mainly occupied by large vitellogenic oocytes (400?500 ?m) 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.
0185-3880
49-38
Benitez-Villalobos, F.
440e0133-3207-4ad5-81e1-44768c83f926
Díaz-Martinez, J.P.
8213402f-7b50-47cc-bce9-06ca2a06c6ed
Tyler, P.A.
d1965388-38cc-4c1d-9217-d59dba4dd7f8
Benitez-Villalobos, F.
440e0133-3207-4ad5-81e1-44768c83f926
Díaz-Martinez, J.P.
8213402f-7b50-47cc-bce9-06ca2a06c6ed
Tyler, P.A.
d1965388-38cc-4c1d-9217-d59dba4dd7f8

Benitez-Villalobos, F., Díaz-Martinez, J.P. and Tyler, P.A. (2007) Reproductive biology of the deep-sea asteroid Henricia abyssicola from the NE Atlantic Ocean. Ciencias Marinas, 33 (1), 49-38.

Record type: Article

Abstract

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 ?m before undergoing vitellogenesis. Maximum oocyte size was ~970 ?m. The ovary volume was mainly occupied by large vitellogenic oocytes (400?500 ?m) 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.

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Published date: 2007

Identifiers

Local EPrints ID: 66001
URI: https://eprints.soton.ac.uk/id/eprint/66001
ISSN: 0185-3880
PURE UUID: ed52cd1a-4d1a-4a6f-beca-4a385b60d9b4

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Date deposited: 17 Apr 2009
Last modified: 19 Jul 2017 00:28

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