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


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).

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Description/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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1371/journal.pone.0060319
ISSNs: 1932-6203 (print)
Organisations: Ocean Biochemistry & Ecosystems
ePrint ID: 350742
Date :
Date Event
29 March 2013Published
Date Deposited: 04 Apr 2013 09:38
Last Modified: 23 Feb 2017 04:05
Projects:
Hydrothermal activity and deep-ocean biology of the Mid-Cayman Rise
Funded by: NERC (NE/F017774/1)
Led by: Jonathan Timothy Copley
15 September 2009 to 1 March 2014
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/350742

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