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- Title
Morphology, reproductive biology and genetic structure of the whale-fall and hydrothermal vent specialist, Bathykurila guaymasensis.
- Authors
Glover, Adrian G.; Goetze, Erica; Dahlgren, Thomas G.; Smith, Craig R.
- Abstract
We examined the reproductive biology and genetic structure of the polychaete Bathykurila guaymasensis (Annelida: Polynoidae), a species recorded from both whale-falls and hydrothermal vents. The habitat of B. guaymasensis is quite different from other vent polynoids, being apparently a specialist feeder on Beggiatoa mat, rather than living commensally with mussels or on the sides of hot vent chimneys. Specimens were collected from whale-fall sites in the Santa Cruz and Santa Catalina Basins, Southern California at depths of 1200–1600 m, and investigated using a combined morphological and molecular approach. The species exhibits marked sexual dimorphism, asynchronous gametogenesis, evidence for internal fertilization and lecithotrophic larval development – all characters shared with other hydrothermal vent polynoids. Two distinct, sympatrically distributed haplotype groups of B. guaymasensis were identified using mitochondrial cytochrome oxidase 1 gene sequences, indicating that there may be two species within the nominal designation B. guaymasensis. Broad sharing of haplotypes between the two whale-fall sites suggests high dispersal rates among basins along the California margin.
- Subjects
SOUTHERN California; POLYNOIDAE; ANIMAL morphology; POLYCHAETA; HYDROTHERMAL vents; MARINE ecology; ANIMAL genetics; ANNELIDA; ZOOLOGY
- Publication
Marine Ecology, 2005, Vol 26, Issue 3/4, p223
- ISSN
0173-9565
- Publication type
Article
- DOI
10.1111/j.1439-0485.2005.00060.x