English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/183006
Share/Impact:
Statistics
logo share SHARE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Feeding and prey capture cycles in the aposymbiontic gorgonian Paramuricea clavata

AuthorsComa, Rafael ; Gili, Josep Maria ; Zabala, Mikel; Riera, Tecla
KeywordsFeeding behaviour
Mediterranean
Benthic communities
Trophic ecology
Prey capture
Gorgonians
Issue DateDec-1994
PublisherInter Research
CitationMarine Ecology Progress Series 115: 257-270 (1994)
AbstractA study of the stomach contents of a population of the Mediterranean gorgoman Para-muricea clavata (hsso, 1826) showed that zooplankton accounted for an important share of the &et. Nauplu, copepod eggs, other invertebrate eggs, and other small (100 to 200 pm) prey items of low motility accounted for 78 % of prey items, though adult calanoid copepods (600 to 700 pm) were also captured. The mean number of prey items per polyp ranged from 1.2 to 3.3. The prey capture rate was highly dependent upon the density and frequency of occurrence of planktonic prey in the habitat. Peak prey capture levels were recorded in spring and at the end of autumn, while prey capture rates fell off substantially in summer, when the proportion of colonies with contracted polyps was very high. There were significant differences in the prey capture rates between colonies, which was attributed to differ-ences in the spatial distribution of the zooplankton. There were also large differences in prey capture rates within the same colony. Polyps located on the apical and peripheral branches captured twice as many prey as those located in the centre or at the base of the colony. It was estimated that the popula-tion, located off the Medes Islands (northwestern Mediterranean) at between 17 and 29 m depth with a mean density of 32 gorgonians m-2, may capture between 1.52 X 105 and 1.06 X 106 prey items m-2 d-l, according to the time of year The prey capture rates recorded during a die1 cycle, when extrapo-lated to an annual cycle, suggest that gorgonians play an important role in littoral food webs and par-ticularly in the flow of energy from the plankton to the benthos
Description14 pages, 4 figures, 9 tables
Publisher version (URL)https://dx.doi.org/10.3354/meps115257
URIhttp://hdl.handle.net/10261/183006
Identifiersdoi: 10.3354/meps115257
issn: 0171-8630
e-issn: 1616-1599
Appears in Collections:(ICM) Artículos
Files in This Item:
File Description SizeFormat 
Coma_et_al_1994.pdf1,16 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.