The cephalopod fauna collected in five MEDITS-ES trawl surveys carried out on the Iberian Mediterranean coast was analysed. Hauls, which were carried out in spring between 1994 and 1998, numbered 480. A total of 34 cephalopod species, grouped in 11 families, was found at depths of between 25 and 786 m. Species and samples assemblages were analysed with the Bray-Curtis similarity index. From the physical parameters studied (depth, temperature and bottom type) only depth showed a positive correlation with cephalopod distribution. Three main cephalopod communities were defined: the shelf community ( 480 m) and a group of cephalopods which were widely distributed more abundantly on the lower continental shelf-upper slope (150-480 m). SIMPER analysis revealed that Loligo (Alloteuthis) media was the main indicator species of the shelf group, Eledone cirrhosa was the indicator species of the lower shelf upper slope group and Todarodes sagittatus of the middle slope community. The 150-480 m stratum was considered a transitional zone, representing an overlapping region for shelf and slope faunas.
Cephalopod assemblages caught by trawling along the Iberian Peninsula mediterranean coast
Published 2002 in Scientia Marina
ABSTRACT
PUBLICATION RECORD
- Publication year
2002
- Venue
Scientia Marina
- Publication date
2002-06-30
- Fields of study
Geography, Environmental Science
- Identifiers
- External record
- Source metadata
Semantic Scholar
CITATION MAP
EXTRACTION MAP
CLAIMS
CONCEPTS
- bottom type
The seafloor substrate category measured as a physical parameter at survey stations.
- bray-curtis similarity index
A similarity measure used to compare species and sample assemblages.
Aliases: Bray-Curtis
- cephalopod communities
Depth-associated groupings of cephalopod assemblages along the shelf and slope.
- cephalopod fauna
The set of cephalopod species collected in the survey hauls.
Aliases: cephalopod assemblage, cephalopod species assemblage
- depth
The seafloor depth at each trawl station, used as an environmental gradient.
- eledone cirrhosa
A cephalopod species recorded in the assemblage survey.
- indicator species
Species highlighted as characterizing particular cephalopod communities.
- loligo (alloteuthis) media
A cephalopod species recorded in the assemblage survey.
- medits-es trawl surveys
A set of five spring trawl survey campaigns conducted on the Iberian Mediterranean coast from 1994 to 1998.
Aliases: MEDITS-ES
- simper analysis
A similarity-percentage procedure used to identify taxa contributing most to each community.
- temperature
The water temperature measured among the physical parameters at survey stations.
- todarodes sagittatus
A cephalopod species recorded in the assemblage survey.
- transitional zone
The 150-480 m depth interval treated as an overlap between shelf and slope faunas.
REFERENCES
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