Trophodynamics of a deep-sea demersal fish assemblage from the bathyal eastern Ionian Sea (Mediterranean Sea)

Trophodynamics of a deep-sea demersal fish assemblage from the bathyal eastern Ionian Sea (Mediterranean Sea)

16 pages, 6 figures, 5 tables

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Main Authors: Madurell, Teresa, Cartes, Joan Enric
Format: artículo biblioteca
Published: Pergamon Press 2005-11
Subjects:Daily ration, Energy intake, Demersal fish, Eastern Mediterranean,
Online Access:http://hdl.handle.net/10261/134449
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spelling dig-icm-es-10261-1344492020-11-10T10:02:55Z Trophodynamics of a deep-sea demersal fish assemblage from the bathyal eastern Ionian Sea (Mediterranean Sea) Madurell, Teresa Cartes, Joan Enric Daily ration Energy intake Demersal fish Eastern Mediterranean 16 pages, 6 figures, 5 tables Daily food consumption of the eight dominant demersal fish species of the bathyal eastern Ionian Sea were determined from field data on four seasonal cruises (April 1999, July August 1999, November 1999 and February 2000). Daily ration (DR) estimates ranged from 0.198 to 4.273% WW/WW. Overall, DR estimates were independent of the model used, and they were comparable to the daily consumption of other deep-sea fauna (e.g. fish and crustaceans). Both sharks studied (Galeus melastomus and Etmopterus spinax) exhibited the highest values of DRs, together with the macrourid Coelorhynchus coelorhynchus in August. Among osteichthyes, DR estimates were related (in a multi-linear regression model) to the nature of their diet (i.e. their trophic level deduced from δ15N isotopic composition, the mean number of prey and trophic diversity). Thus, species feeding at a lower trophic level, ingesting a large number of prey items and with a very diversified diet had higher DR than species from higher trophic level and feeding fewer prey items. By season, the DR of species feeding mainly on mesopelagic prey (Hoplostethus mediterraneus and Helicolenus dactylopterus) were higher in summer, while DR for benthos/suprabenthos feeders (i.e. C. coelorhynchus and Nezumia sclerorhynchus) were higher in spring. Higher food consumption coincides with maximum food availability, both among mesopelagic feeders (higher availability of euphausiids, Pasiphaea sivado and Sergestes arcticus in summer) and among Macrouridae (higher suprabenthos densities in spring). In a tentative estimate the energy intake deduced from diet (i.e. mean energy value of food ingested) was constant in all seasons for each species studied. Results for the energy intake also indicate higher energy intake in the diet of mesopelagic feeders than in the diet of benthic feeders. Overall results are discussed in relation to the deep-sea ecosystem structure and functioning. © 2005 Elsevier Ltd. All rights reserved. This work was funded by the EU under the FAIR-GT-1376 contract (Marie Curie Fellowship) Peer Reviewed 2016-07-05T10:30:41Z 2016-07-05T10:30:41Z 2005-11 2016-07-05T10:30:41Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.dsr.2005.06.013 issn: 0967-0637 e-issn: 1879-0119 Deep-Sea Research Part I: Oceanographic Research Papers 52(11): 2049-2064 (2005) http://hdl.handle.net/10261/134449 10.1016/j.dsr.2005.06.013 https://doi.org/10.1016/j.dsr.2005.06.013 Sí none Pergamon Press
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
topic Daily ration
Energy intake
Demersal fish
Eastern Mediterranean
Daily ration
Energy intake
Demersal fish
Eastern Mediterranean
spellingShingle Daily ration
Energy intake
Demersal fish
Eastern Mediterranean
Daily ration
Energy intake
Demersal fish
Eastern Mediterranean
Madurell, Teresa
Cartes, Joan Enric
Trophodynamics of a deep-sea demersal fish assemblage from the bathyal eastern Ionian Sea (Mediterranean Sea)
description 16 pages, 6 figures, 5 tables
format artículo
topic_facet Daily ration
Energy intake
Demersal fish
Eastern Mediterranean
author Madurell, Teresa
Cartes, Joan Enric
author_facet Madurell, Teresa
Cartes, Joan Enric
author_sort Madurell, Teresa
title Trophodynamics of a deep-sea demersal fish assemblage from the bathyal eastern Ionian Sea (Mediterranean Sea)
title_short Trophodynamics of a deep-sea demersal fish assemblage from the bathyal eastern Ionian Sea (Mediterranean Sea)
title_full Trophodynamics of a deep-sea demersal fish assemblage from the bathyal eastern Ionian Sea (Mediterranean Sea)
title_fullStr Trophodynamics of a deep-sea demersal fish assemblage from the bathyal eastern Ionian Sea (Mediterranean Sea)
title_full_unstemmed Trophodynamics of a deep-sea demersal fish assemblage from the bathyal eastern Ionian Sea (Mediterranean Sea)
title_sort trophodynamics of a deep-sea demersal fish assemblage from the bathyal eastern ionian sea (mediterranean sea)
publisher Pergamon Press
publishDate 2005-11
url http://hdl.handle.net/10261/134449
work_keys_str_mv AT madurellteresa trophodynamicsofadeepseademersalfishassemblagefromthebathyaleasternionianseamediterraneansea
AT cartesjoanenric trophodynamicsofadeepseademersalfishassemblagefromthebathyaleasternionianseamediterraneansea
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