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Spatial Variation in the Population Structure and Reproductive Biology of Rimicaris hybisae(Caridea: Alvinocarididae) at Hydrothermal Vents on the Mid-Cayman Spreading Centre

Spatial Variation in the Population Structure and Reproductive Biology of Rimicaris hybisae(Caridea: Alvinocarididae) at Hydrothermal Vents on the Mid-Cayman Spreading Centre
Spatial Variation in the Population Structure and Reproductive Biology of Rimicaris hybisae(Caridea: Alvinocarididae) at Hydrothermal Vents on the Mid-Cayman Spreading Centre
The dynamics and microdistribution of faunal assemblages at hydrothermal vents often reflect the fine-scale spatial and temporal heterogeneity of the vent environment. This study examined the reproductive development and population structure of the caridean shrimp Rimicaris hybisae at the Beebe and Von Damm Vent Fields (Mid-Cayman Spreading Centre, Caribbean) using spatially discrete samples collected in January 2012. Rimicaris hybisae is gonochoric and exhibits iteroparous reproduction. Oocyte size-frequency distributions (21-823 ?m feret diameters) varied significantly among samples. Embryo development was asynchronous among females, which may result in asynchronous larval release for the populations. Specimens of R. hybisae from the Von Damm Vent Field (2294 m) were significantly larger than specimens from the Beebe Vent Field. Brooding females at Von Damm exhibited greater size-specific fecundity, possibly as a consequence of a non-linear relationship between fecundity and body size that was consistent across both vent fields. Samples collected from several locations at the Beebe Vent Field (4944-4972 m) revealed spatial variability in the sex ratios, population structure, size, and development of oocytes and embryos of this mobile species. Samples from the Von Damm Vent Field and sample J2-613-24 from Beebe Woods exhibited the highest frequencies of ovigerous females and significantly female-biased sex ratios. Environmental variables within shrimp aggregations may influence the distribution of ovigerous females, resulting in a spatially heterogeneous pattern of reproductive development in R. hybisae, as found in other vent taxa.
1932-6203
e60319
Nye, Verity
e3688d01-623f-47b5-9a4c-7e49b16aa5a8
Copley, J.
5f30e2a6-76c1-4150-9a42-dcfb8f5788ef
Tyler, Paul A.
d1965388-38cc-4c1d-9217-d59dba4dd7f8
Nye, Verity
e3688d01-623f-47b5-9a4c-7e49b16aa5a8
Copley, J.
5f30e2a6-76c1-4150-9a42-dcfb8f5788ef
Tyler, Paul A.
d1965388-38cc-4c1d-9217-d59dba4dd7f8

Nye, Verity, Copley, J. and Tyler, Paul A. (2013) Spatial Variation in the Population Structure and Reproductive Biology of Rimicaris hybisae(Caridea: Alvinocarididae) at Hydrothermal Vents on the Mid-Cayman Spreading Centre PLoS ONE, 8, (3), e60319. (doi:10.1371/journal.pone.0060319).

Record type: Article

Abstract

The dynamics and microdistribution of faunal assemblages at hydrothermal vents often reflect the fine-scale spatial and temporal heterogeneity of the vent environment. This study examined the reproductive development and population structure of the caridean shrimp Rimicaris hybisae at the Beebe and Von Damm Vent Fields (Mid-Cayman Spreading Centre, Caribbean) using spatially discrete samples collected in January 2012. Rimicaris hybisae is gonochoric and exhibits iteroparous reproduction. Oocyte size-frequency distributions (21-823 ?m feret diameters) varied significantly among samples. Embryo development was asynchronous among females, which may result in asynchronous larval release for the populations. Specimens of R. hybisae from the Von Damm Vent Field (2294 m) were significantly larger than specimens from the Beebe Vent Field. Brooding females at Von Damm exhibited greater size-specific fecundity, possibly as a consequence of a non-linear relationship between fecundity and body size that was consistent across both vent fields. Samples collected from several locations at the Beebe Vent Field (4944-4972 m) revealed spatial variability in the sex ratios, population structure, size, and development of oocytes and embryos of this mobile species. Samples from the Von Damm Vent Field and sample J2-613-24 from Beebe Woods exhibited the highest frequencies of ovigerous females and significantly female-biased sex ratios. Environmental variables within shrimp aggregations may influence the distribution of ovigerous females, resulting in a spatially heterogeneous pattern of reproductive development in R. hybisae, as found in other vent taxa.

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Published date: 29 March 2013
Organisations: Ocean Biochemistry & Ecosystems

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Local EPrints ID: 350742
URI: http://eprints.soton.ac.uk/id/eprint/350742
ISSN: 1932-6203
PURE UUID: e34b0387-2c5b-4801-8ec3-172362a5684a

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Date deposited: 04 Apr 2013 09:38
Last modified: 03 Oct 2017 16:40

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Contributors

Author: Verity Nye
Author: J. Copley
Author: Paul A. Tyler

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