Reburial potential and survivability of the striped venus clam (Chamelea gallina) in hydraulic dredge fisheries

Abstract The striped venus clam (Chamelea gallina) is the main edible bivalve living in Italian waters. According to Regulation (EU) 2020/2237, undersized specimens (total length of the shell, < 22 mm) must be returned to the sea. C. gallina specimens of different size classes that had undergone...

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Autores principales:	Giada Bargione, Andrea Petetta, Claudio Vasapollo, Massimo Virgili, Alessandro Lucchetti
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1ef4cbd184df4b7ca34223ce629d52db
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spelling	oai:doaj.org-article:1ef4cbd184df4b7ca34223ce629d52db2021-12-02T17:39:31ZReburial potential and survivability of the striped venus clam (Chamelea gallina) in hydraulic dredge fisheries10.1038/s41598-021-88542-82045-2322https://doaj.org/article/1ef4cbd184df4b7ca34223ce629d52db2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88542-8https://doaj.org/toc/2045-2322Abstract The striped venus clam (Chamelea gallina) is the main edible bivalve living in Italian waters. According to Regulation (EU) 2020/2237, undersized specimens (total length of the shell, < 22 mm) must be returned to the sea. C. gallina specimens of different size classes that had undergone hydraulic dredging and mechanized sorting were analysed for reburial ability in a laboratory tank and for survivability in the laboratory (135 clams, 21 days) and at sea (320 clams, 15 days). In the tank experiments, the reburial times (T50 and T90) and the upper (+) and lower (−) confidence intervals (CIs) of the whole sample were about 4 h (CI+ 4.4, CI− 3.6) and 8 h (CI+ 8.2, CI− 7.7), respectively, and were significantly shorter for the medium-sized clams (22–24.9 mm) than for the smallest (< 21.9 mm) and the largest (> 25 mm) specimens. For the field survivability experiments, clams under and above the minimum conservation reference size were placed in separate metal cages. Survival rates were 94.8% and 96.2% respectively in the laboratory and at sea, without significant differences between the two experiments or among size classes. These findings conclusively demonstrate that C. gallina specimens returned to the sea have a very high survival probability and that they can contribute to mitigate the overexploitation of natural populations.Giada BargioneAndrea PetettaClaudio VasapolloMassimo VirgiliAlessandro LucchettiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Giada Bargione Andrea Petetta Claudio Vasapollo Massimo Virgili Alessandro Lucchetti Reburial potential and survivability of the striped venus clam (Chamelea gallina) in hydraulic dredge fisheries
description	Abstract The striped venus clam (Chamelea gallina) is the main edible bivalve living in Italian waters. According to Regulation (EU) 2020/2237, undersized specimens (total length of the shell, < 22 mm) must be returned to the sea. C. gallina specimens of different size classes that had undergone hydraulic dredging and mechanized sorting were analysed for reburial ability in a laboratory tank and for survivability in the laboratory (135 clams, 21 days) and at sea (320 clams, 15 days). In the tank experiments, the reburial times (T50 and T90) and the upper (+) and lower (−) confidence intervals (CIs) of the whole sample were about 4 h (CI+ 4.4, CI− 3.6) and 8 h (CI+ 8.2, CI− 7.7), respectively, and were significantly shorter for the medium-sized clams (22–24.9 mm) than for the smallest (< 21.9 mm) and the largest (> 25 mm) specimens. For the field survivability experiments, clams under and above the minimum conservation reference size were placed in separate metal cages. Survival rates were 94.8% and 96.2% respectively in the laboratory and at sea, without significant differences between the two experiments or among size classes. These findings conclusively demonstrate that C. gallina specimens returned to the sea have a very high survival probability and that they can contribute to mitigate the overexploitation of natural populations.
format	article
author	Giada Bargione Andrea Petetta Claudio Vasapollo Massimo Virgili Alessandro Lucchetti
author_facet	Giada Bargione Andrea Petetta Claudio Vasapollo Massimo Virgili Alessandro Lucchetti
author_sort	Giada Bargione
title	Reburial potential and survivability of the striped venus clam (Chamelea gallina) in hydraulic dredge fisheries
title_short	Reburial potential and survivability of the striped venus clam (Chamelea gallina) in hydraulic dredge fisheries
title_full	Reburial potential and survivability of the striped venus clam (Chamelea gallina) in hydraulic dredge fisheries
title_fullStr	Reburial potential and survivability of the striped venus clam (Chamelea gallina) in hydraulic dredge fisheries
title_full_unstemmed	Reburial potential and survivability of the striped venus clam (Chamelea gallina) in hydraulic dredge fisheries
title_sort	reburial potential and survivability of the striped venus clam (chamelea gallina) in hydraulic dredge fisheries
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1ef4cbd184df4b7ca34223ce629d52db
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Reburial potential and survivability of the striped venus clam (Chamelea gallina) in hydraulic dredge fisheries

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