Influence of trawl type on the composition and diversity of deep benthopelagic fish and decapod assemblages off the Catalan coasts (western Mediterranean)
A series of 57 (600-750 m) and 32 (1184-1320 m) hauls were compiled to compare data from four trawl types in analyses of the species composition and diversity of deep benthopelagic fish and decapods off the Catalonian coasts (western Mediterranean). Two 1-warp trawls (OTSB-14 and OTMS-25) and two 2-...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Consejo Superior de Investigaciones Científicas
2009-12-01
|
Series: | Scientia Marina |
Subjects: | |
Online Access: | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1098 |
id |
doaj-3307c12c5c174e77950d4ffc543f1292 |
---|---|
record_format |
Article |
spelling |
doaj-3307c12c5c174e77950d4ffc543f12922021-05-05T13:49:40ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342009-12-0173472573710.3989/scimar.2009.73n47251088Influence of trawl type on the composition and diversity of deep benthopelagic fish and decapod assemblages off the Catalan coasts (western Mediterranean)Joan E. Cartes0Francesc Maynou1Domènec Lloris2Luis Gil de Sola3Mariano Garcia4Institut de Ciències del Mar (CMIMA-CSIC)Institut de Ciències del Mar (CMIMA-CSIC)Institut de Ciències del Mar (CMIMA-CSIC)Instituto Español de Oceanografía (IEO)Instituto Español de Oceanografía (IEO)A series of 57 (600-750 m) and 32 (1184-1320 m) hauls were compiled to compare data from four trawl types in analyses of the species composition and diversity of deep benthopelagic fish and decapods off the Catalonian coasts (western Mediterranean). Two 1-warp trawls (OTSB-14 and OTMS-25) and two 2-warp trawls (a commercial trawl [CT] and a GOC73) were used, from hauls performed between 1988 and 2007 were compiled. At 600-750 m the OTSB-14 hauls were separated in multi-dimensional scaling (MDS) from hauls performed with MTS-25, CT, and GOC73. Ordination of hauls along DIM1 of MDS was significantly correlated (Spearman’s r) with mesh size at codend, bridle length, and vertical opening of trawls. When CT and GOC73 were compared with MTS-25, the most dissimilar species were Aristeus antennatus, Galeus melastomus and Trachyrhynchus scabrus. A particular case was A. antennatus, with a significantly higher abundance in MTS-25 catches than the rest of the trawls. At 1200 m the OTSB-14 and MTS-25 hauls were segregated in MDS analysis. DIM2 was correlated with the sampling period (month), indicating a temporal effect on haul composition. At 1200 m the main dissimilarities between OTSB-14 and MTS-25 were marked by Alepocephalus rostratus and A. antennatus (caught with MTS-25), and by Cataetyx alleni, the Notacanthidae Notacanthus bonapartei and Polyacanthonotus rissoanus, and Plesionika acanthonotus (caught with OTSB-14). As a conclusion, OTSB-14 showed a significantly higher abundance in catches than MTS-25, CT and GOC73, and a higher S (number of species) and J (equitability) than MTS-25. On the lower slope seasonality influenced trawl comparisons; however, it is likely that MTS-25, with higher vertical height than OTSB-14, caught the benthopelagic fish A. rostratus more efficiently, explaining the higher biomass from MTS-25 there. MTS-25 positively selected A. antennatus, in parallel to a negative catchability for other species.http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1098deep seatrawl comparisondiversitydecapod crustaceansfishesaristeus antennatusotsb |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Joan E. Cartes Francesc Maynou Domènec Lloris Luis Gil de Sola Mariano Garcia |
spellingShingle |
Joan E. Cartes Francesc Maynou Domènec Lloris Luis Gil de Sola Mariano Garcia Influence of trawl type on the composition and diversity of deep benthopelagic fish and decapod assemblages off the Catalan coasts (western Mediterranean) Scientia Marina deep sea trawl comparison diversity decapod crustaceans fishes aristeus antennatus otsb |
author_facet |
Joan E. Cartes Francesc Maynou Domènec Lloris Luis Gil de Sola Mariano Garcia |
author_sort |
Joan E. Cartes |
title |
Influence of trawl type on the composition and diversity of deep benthopelagic fish and decapod assemblages off the Catalan coasts (western Mediterranean) |
title_short |
Influence of trawl type on the composition and diversity of deep benthopelagic fish and decapod assemblages off the Catalan coasts (western Mediterranean) |
title_full |
Influence of trawl type on the composition and diversity of deep benthopelagic fish and decapod assemblages off the Catalan coasts (western Mediterranean) |
title_fullStr |
Influence of trawl type on the composition and diversity of deep benthopelagic fish and decapod assemblages off the Catalan coasts (western Mediterranean) |
title_full_unstemmed |
Influence of trawl type on the composition and diversity of deep benthopelagic fish and decapod assemblages off the Catalan coasts (western Mediterranean) |
title_sort |
influence of trawl type on the composition and diversity of deep benthopelagic fish and decapod assemblages off the catalan coasts (western mediterranean) |
publisher |
Consejo Superior de Investigaciones Científicas |
series |
Scientia Marina |
issn |
0214-8358 1886-8134 |
publishDate |
2009-12-01 |
description |
A series of 57 (600-750 m) and 32 (1184-1320 m) hauls were compiled to compare data from four trawl types in analyses of the species composition and diversity of deep benthopelagic fish and decapods off the Catalonian coasts (western Mediterranean). Two 1-warp trawls (OTSB-14 and OTMS-25) and two 2-warp trawls (a commercial trawl [CT] and a GOC73) were used, from hauls performed between 1988 and 2007 were compiled. At 600-750 m the OTSB-14 hauls were separated in multi-dimensional scaling (MDS) from hauls performed with MTS-25, CT, and GOC73. Ordination of hauls along DIM1 of MDS was significantly correlated (Spearman’s r) with mesh size at codend, bridle length, and vertical opening of trawls. When CT and GOC73 were compared with MTS-25, the most dissimilar species were Aristeus antennatus, Galeus melastomus and Trachyrhynchus scabrus. A particular case was A. antennatus, with a significantly higher abundance in MTS-25 catches than the rest of the trawls. At 1200 m the OTSB-14 and MTS-25 hauls were segregated in MDS analysis. DIM2 was correlated with the sampling period (month), indicating a temporal effect on haul composition. At 1200 m the main dissimilarities between OTSB-14 and MTS-25 were marked by Alepocephalus rostratus and A. antennatus (caught with MTS-25), and by Cataetyx alleni, the Notacanthidae Notacanthus bonapartei and Polyacanthonotus rissoanus, and Plesionika acanthonotus (caught with OTSB-14). As a conclusion, OTSB-14 showed a significantly higher abundance in catches than MTS-25, CT and GOC73, and a higher S (number of species) and J (equitability) than MTS-25. On the lower slope seasonality influenced trawl comparisons; however, it is likely that MTS-25, with higher vertical height than OTSB-14, caught the benthopelagic fish A. rostratus more efficiently, explaining the higher biomass from MTS-25 there. MTS-25 positively selected A. antennatus, in parallel to a negative catchability for other species. |
topic |
deep sea trawl comparison diversity decapod crustaceans fishes aristeus antennatus otsb |
url |
http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1098 |
work_keys_str_mv |
AT joanecartes influenceoftrawltypeonthecompositionanddiversityofdeepbenthopelagicfishanddecapodassemblagesoffthecatalancoastswesternmediterranean AT francescmaynou influenceoftrawltypeonthecompositionanddiversityofdeepbenthopelagicfishanddecapodassemblagesoffthecatalancoastswesternmediterranean AT domeneclloris influenceoftrawltypeonthecompositionanddiversityofdeepbenthopelagicfishanddecapodassemblagesoffthecatalancoastswesternmediterranean AT luisgildesola influenceoftrawltypeonthecompositionanddiversityofdeepbenthopelagicfishanddecapodassemblagesoffthecatalancoastswesternmediterranean AT marianogarcia influenceoftrawltypeonthecompositionanddiversityofdeepbenthopelagicfishanddecapodassemblagesoffthecatalancoastswesternmediterranean |
_version_ |
1721461040245374976 |