A multivariate analysis of larval fish and paralarval cephalopod assemblages at Great Meteor Seamount

Diekmann, Rabea, Nellen, Walter and Piatkowski, Uwe (2006) A multivariate analysis of larval fish and paralarval cephalopod assemblages at Great Meteor Seamount Deep Sea Research Part I: Oceanographic Research Papers, 53 (10). pp. 1635-1657. DOI 10.1016/j.dsr.2006.08.008.

[img] Text
2006 Diekmann_etal_DeepSeaResI53.pdf - Published Version
Restricted to Registered users only

Download (1745Kb) | Contact

Supplementary data:


Assemblage structures and distribution patterns of larval fishes and paralarval cephalopods were examined in September 1998 at Great Meteor Seamount, an isolated seamount located in the subtropical eastern North Atlantic. Early life stages of fish (n=18555) and cephalopods (n=1200) were collected at 23 stations with a multiple opening–closing net, in seven discrete depth strata from 290 m depth (close to the seamount plateau) to the surface. Oceanic species dominated in both taxonomic groups. A peak in diversity was observed at an intermediate depth, in the 100–150 m water layer. Direct and indirect gradient analyses showed distinct species assemblages in the upper and lower part of the water column, separated by approximately 150 m. The division was statistically significant, although a considerable overlap between species was also observed. Above the summit, vertical gaps were found in the distributions of the deeper assemblages, likely caused by increased predation pressure by benthopelagic fish. Horizontal distribution patterns of fish and cephalopods were similar and corresponded to the structure of closed circulation cells detected above the flanks and the flat plateau area. Fish assemblages were significantly different between the inner and outer seamount regime, which was approximately separated by the 1500 m depth contour. Differences in the taxonomic composition of cephalopods were less pronounced; for only one cephalopod species could a direct association with the seamount be assumed. The study indicates a significant retention potential at the seamount that facilitates local recruitment of resident stocks and generates self-sustainable populations isolated from the continental shelf and oceanic islands.

Document Type: Article
Keywords: Fish larvae, Cephalopoda, Distribution patterns, Gradient analysis, Retention, Great Meteor Seamount
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Evolutionary Ecology of Marine Fishes
Refereed: Yes
DOI etc.: 10.1016/j.dsr.2006.08.008
ISSN: 0967-0637
Date Deposited: 03 Dec 2008 16:51
Last Modified: 01 Nov 2016 11:40
URI: http://eprints.uni-kiel.de/id/eprint/876

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...