To what extent can specialized species succeed in the deep sea? The biology and trophic ecology of deep-sea spiny eels (Notacanthidae) in the Mediterranean Sea

To what extent can specialized species succeed in the deep sea? The biology and trophic ecology of deep-sea spiny eels (Notacanthidae) in the Mediterranean Sea

17 pages, 9 figures, 7 tables

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Main Authors: Rodríguez Romeu, Oriol, Cartes, Joan Enric, Solé, Montserrat, Carrasson, Maite
Other Authors: Ministerio de Economía y Competitividad (España)
Format: artículo biblioteca
Published: Pergamon Press 2016-09
Online Access:http://hdl.handle.net/10261/136539
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100006280
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spelling dig-icm-es-10261-1365392019-03-06T12:09:16Z To what extent can specialized species succeed in the deep sea? The biology and trophic ecology of deep-sea spiny eels (Notacanthidae) in the Mediterranean Sea Rodríguez Romeu, Oriol Cartes, Joan Enric Solé, Montserrat Carrasson, Maite Ministerio de Economía y Competitividad (España) Ministerio de Ciencia y Tecnología (España) 17 pages, 9 figures, 7 tables The population structure, reproductive biology and feeding ecology of the two notacanthids inhabiting the deep Mediterranean, Notacanthus bonapartei and Polyacanthonotus rissoanus, were analyzed in the Balearic Basin at depths from 579 to 2233 m (mainly pristine depths or subjected to low fishing impact), including seasonal variations. Preferred average depths (Centres of Gravity, CoG) of Notacanthusbonapartei were situated over the middle slope (942 m) and of P. rissoanus on the lower slope (1680 m). For both species, bigger individuals collected at the deepest depths had the highest values of a gonadosomatic index (GSI), suggesting that in reproductive periods adults migrate into deeper waters. The reproductive season for N. bonapartei was late summer and autumn; that of P. rissoanus was narrower, restricted to summer. N. bonapartei exploited benthic prey, among identified prey mainly echinoderms (e.g., Penilpidia ludwigi, Hymenodiscus coronata) and sessile benthic organisms (e.g., actinians and polyps of the bamboo coral Isidella elongata). Consumption of bamboo coral polyps by N. bonapartei constitutes a unique specialized trophic strategy and a direct link with such corals. Some differences in the diet composition related to depth were observed, as were a few differences related to periods of water-column stratification and homogenization. Gut fullness (F) of this species was mainly correlated with surface Chlorophyll a recorded 2–3 months before sampling date and somewhat but less so with river discharges 1 month before sampling. That suggests that vertical flux of organic matter was the food source for prey exploited by N. bonapartei. Diet of P. rissoanus was based on epibenthic-suprabenthic crustaceans, e.g. tanaids (Apseudes spp.), isopods (Munnopsurus atlanticus) and amphipods (Rhachotropis caeca) and on polychaetes (Polynoidae, Harmothoe spp.), all these prey more mobile than consumed by N. bonapartei. No significant differences in diet composition were found related with either depth or homogenization/stratification of the water column. This lack of changes in diet is probably attributable to the greater stability of the lower slope where P. rissoanus lives. Gut fullness was mainly correlated with surface Chlorophyll a recorded simultaneously with the fish sampling. Lactate dehydrogenase (LDH) activity was similar in the muscle of the two notacanthids (N. bonapartei=3.72–8.75 µmol/min/mg prot; P. rissoanus=7.56 µmol/min/mg prot). Values for N. bonapartei were the highest found compared to other deep-sea fish in the deep Mediterranean. This could be related with the special feeding behaviour of this species when it removes sessile prey from substrate This study was performed within the MICYT project ANTROMARE, and continued thanks to the multi-methological approach done in proposals like TREND (CTM2014-54018-C3), though not financed by MINECO evaluators Peer Reviewed 2016-09-09T07:20:47Z 2016-09-09T07:20:47Z 2016-09 2016-09-09T07:20:47Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.dsr.2016.05.006 issn: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers 115: 74-90 (2016) http://hdl.handle.net/10261/136539 10.1016/j.dsr.2016.05.006 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100006280 http://dx.doi.org/10.1016/j.dsr.2016.05.006 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
description 17 pages, 9 figures, 7 tables
author2 Ministerio de Economía y Competitividad (España)
author_facet Ministerio de Economía y Competitividad (España)
Rodríguez Romeu, Oriol
Cartes, Joan Enric
Solé, Montserrat
Carrasson, Maite
format artículo
author Rodríguez Romeu, Oriol
Cartes, Joan Enric
Solé, Montserrat
Carrasson, Maite
spellingShingle Rodríguez Romeu, Oriol
Cartes, Joan Enric
Solé, Montserrat
Carrasson, Maite
To what extent can specialized species succeed in the deep sea? The biology and trophic ecology of deep-sea spiny eels (Notacanthidae) in the Mediterranean Sea
author_sort Rodríguez Romeu, Oriol
title To what extent can specialized species succeed in the deep sea? The biology and trophic ecology of deep-sea spiny eels (Notacanthidae) in the Mediterranean Sea
title_short To what extent can specialized species succeed in the deep sea? The biology and trophic ecology of deep-sea spiny eels (Notacanthidae) in the Mediterranean Sea
title_full To what extent can specialized species succeed in the deep sea? The biology and trophic ecology of deep-sea spiny eels (Notacanthidae) in the Mediterranean Sea
title_fullStr To what extent can specialized species succeed in the deep sea? The biology and trophic ecology of deep-sea spiny eels (Notacanthidae) in the Mediterranean Sea
title_full_unstemmed To what extent can specialized species succeed in the deep sea? The biology and trophic ecology of deep-sea spiny eels (Notacanthidae) in the Mediterranean Sea
title_sort to what extent can specialized species succeed in the deep sea? the biology and trophic ecology of deep-sea spiny eels (notacanthidae) in the mediterranean sea
publisher Pergamon Press
publishDate 2016-09
url http://hdl.handle.net/10261/136539
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100006280
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AT cartesjoanenric towhatextentcanspecializedspeciessucceedinthedeepseathebiologyandtrophicecologyofdeepseaspinyeelsnotacanthidaeinthemediterraneansea
AT solemontserrat towhatextentcanspecializedspeciessucceedinthedeepseathebiologyandtrophicecologyofdeepseaspinyeelsnotacanthidaeinthemediterraneansea
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