Changes in the juvenile fish assemblage of a Mediterranean shallow Posidonia oceanica seagrass nursery area after half a century
The within-year dynamics of the juvenile fish community in a shallow seagrass-dominated nursery habitat (Posidonia oceanica) in a Mediterranean bay were compared between two surveys separated by 50 years (1960 and 2012-2013). A nocturnal survey over depths ranging from 2 to 10 m over patchy seagrass...
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NATL CENTRE MARINE RESEARCH
2020
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Online Access: | http://hdl.handle.net/10498/22312 https://doi.org/10.12681/mms.19510 |
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ftunivcadiz:oai:rodin.uca.es:10498/22312 2023-05-15T13:28:06+02:00 Changes in the juvenile fish assemblage of a Mediterranean shallow Posidonia oceanica seagrass nursery area after half a century Diaz-Gil, Carlos Grau, Amalia Grau, Antonio María Palmer, Miquel Cabrera Castro, Remedios Jordà, Gabriel Catalán, Ignacio Biología 2020-02-05T09:15:07Z application/pdf http://hdl.handle.net/10498/22312 https://doi.org/10.12681/mms.19510 eng eng NATL CENTRE MARINE RESEARCH 1108-393X http://hdl.handle.net/10498/22312 doi:10.12681/mms.19510 Atribución-NoComercial-CompartirIgual 4.0 Internacional http://creativecommons.org/licenses/by-nc-sa/4.0/ info:eu-repo/semantics/openAccess CC-BY-NC-SA Mediterranean Marine Science Vol. 20, 2019 Seagrass meadow nursery habitat management juvenile fish assemblages info:eu-repo/semantics/article 2020 ftunivcadiz https://doi.org/10.12681/mms.19510 2023-02-24T08:02:42Z The within-year dynamics of the juvenile fish community in a shallow seagrass-dominated nursery habitat (Posidonia oceanica) in a Mediterranean bay were compared between two surveys separated by 50 years (1960 and 2012-2013). A nocturnal survey over depths ranging from 2 to 10 m over patchy seagrass meadows was conducted for one year (2012-2013) through 72 epibenthic tows spread fortnightly in 4 nearby stations, mimicking a survey conducted in 1960 in terms of sampling intensity, sampling zone, temporal coverage and sampling gear. Although a large proportion of the fish species were similar among surveys, remarkable and statistically significant differences were detected. A striking feature was that one of the most common and abundant Sparidae species currently, Diplodus annularis, did not appear in 1960. Other strong differences included the nonappearance of the European eel Anguilla anguilla in the recent survey. Furthermore, one of the most valuable species for artisanal fisheries in the area, the black scorpionfish Scorpaena porcus, was almost 10 times less abundant in 1960. A finer-scale study of the 2012-2013 survey allowed a quantitative analysis between species composition and potential environmental drivers through redundancy analysis that well described the current pattern of time-dependent recruitment pulses in nearshore meadows of the area throughout the year, with marked effects of surface temperature and photoperiod. The comparison between surveys suggests that some major differences between surveys are not likely to be attributable to interannual stochasticity in recruitment or environmental variability but may be related to i) unaccounted-for habitat transformation and/or ii) the strong decrease in juvenile fishing mortality in this shallow nursery area since the enforcement of bans on littoral epibenthic trawling activities characteristic of this area. Article in Journal/Newspaper Anguilla anguilla European eel RODIN - Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz Mediterranean Marine Science 20 3 603 |
institution |
Open Polar |
collection |
RODIN - Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz |
op_collection_id |
ftunivcadiz |
language |
English |
topic |
Seagrass meadow nursery habitat management juvenile fish assemblages |
spellingShingle |
Seagrass meadow nursery habitat management juvenile fish assemblages Diaz-Gil, Carlos Grau, Amalia Grau, Antonio María Palmer, Miquel Cabrera Castro, Remedios Jordà, Gabriel Catalán, Ignacio Changes in the juvenile fish assemblage of a Mediterranean shallow Posidonia oceanica seagrass nursery area after half a century |
topic_facet |
Seagrass meadow nursery habitat management juvenile fish assemblages |
description |
The within-year dynamics of the juvenile fish community in a shallow seagrass-dominated nursery habitat (Posidonia oceanica) in a Mediterranean bay were compared between two surveys separated by 50 years (1960 and 2012-2013). A nocturnal survey over depths ranging from 2 to 10 m over patchy seagrass meadows was conducted for one year (2012-2013) through 72 epibenthic tows spread fortnightly in 4 nearby stations, mimicking a survey conducted in 1960 in terms of sampling intensity, sampling zone, temporal coverage and sampling gear. Although a large proportion of the fish species were similar among surveys, remarkable and statistically significant differences were detected. A striking feature was that one of the most common and abundant Sparidae species currently, Diplodus annularis, did not appear in 1960. Other strong differences included the nonappearance of the European eel Anguilla anguilla in the recent survey. Furthermore, one of the most valuable species for artisanal fisheries in the area, the black scorpionfish Scorpaena porcus, was almost 10 times less abundant in 1960. A finer-scale study of the 2012-2013 survey allowed a quantitative analysis between species composition and potential environmental drivers through redundancy analysis that well described the current pattern of time-dependent recruitment pulses in nearshore meadows of the area throughout the year, with marked effects of surface temperature and photoperiod. The comparison between surveys suggests that some major differences between surveys are not likely to be attributable to interannual stochasticity in recruitment or environmental variability but may be related to i) unaccounted-for habitat transformation and/or ii) the strong decrease in juvenile fishing mortality in this shallow nursery area since the enforcement of bans on littoral epibenthic trawling activities characteristic of this area. |
author2 |
Biología |
format |
Article in Journal/Newspaper |
author |
Diaz-Gil, Carlos Grau, Amalia Grau, Antonio María Palmer, Miquel Cabrera Castro, Remedios Jordà, Gabriel Catalán, Ignacio |
author_facet |
Diaz-Gil, Carlos Grau, Amalia Grau, Antonio María Palmer, Miquel Cabrera Castro, Remedios Jordà, Gabriel Catalán, Ignacio |
author_sort |
Diaz-Gil, Carlos |
title |
Changes in the juvenile fish assemblage of a Mediterranean shallow Posidonia oceanica seagrass nursery area after half a century |
title_short |
Changes in the juvenile fish assemblage of a Mediterranean shallow Posidonia oceanica seagrass nursery area after half a century |
title_full |
Changes in the juvenile fish assemblage of a Mediterranean shallow Posidonia oceanica seagrass nursery area after half a century |
title_fullStr |
Changes in the juvenile fish assemblage of a Mediterranean shallow Posidonia oceanica seagrass nursery area after half a century |
title_full_unstemmed |
Changes in the juvenile fish assemblage of a Mediterranean shallow Posidonia oceanica seagrass nursery area after half a century |
title_sort |
changes in the juvenile fish assemblage of a mediterranean shallow posidonia oceanica seagrass nursery area after half a century |
publisher |
NATL CENTRE MARINE RESEARCH |
publishDate |
2020 |
url |
http://hdl.handle.net/10498/22312 https://doi.org/10.12681/mms.19510 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
Mediterranean Marine Science Vol. 20, 2019 |
op_relation |
1108-393X http://hdl.handle.net/10498/22312 doi:10.12681/mms.19510 |
op_rights |
Atribución-NoComercial-CompartirIgual 4.0 Internacional http://creativecommons.org/licenses/by-nc-sa/4.0/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.12681/mms.19510 |
container_title |
Mediterranean Marine Science |
container_volume |
20 |
container_issue |
3 |
container_start_page |
603 |
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1766402245394432000 |