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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Nature Portfolio
2021-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-021-88542-8 |
| _version_ | 1818692076152291328 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-17T12:52:02Z |
| format | Article |
| id | doaj.art-1ef4cbd184df4b7ca34223ce629d52db |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-17T12:52:02Z |
| publishDate | 2021-04-01 |
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| spelling | doaj.art-1ef4cbd184df4b7ca34223ce629d52db2022-12-21T21:47:34ZengNature PortfolioScientific Reports2045-23222021-04-011111910.1038/s41598-021-88542-8Reburial potential and survivability of the striped venus clam (Chamelea gallina) in hydraulic dredge fisheriesGiada Bargione0Andrea Petetta1Claudio Vasapollo2Massimo Virgili3Alessandro Lucchetti4Department of Biological, Geological and Environmental Sciences, University of BolognaDepartment of Biological, Geological and Environmental Sciences, University of BolognaInstitute for Biological Resources and Marine Biotechnologies (IRBIM) of Ancona (Italy), National Research Council (CNR)Institute for Biological Resources and Marine Biotechnologies (IRBIM) of Ancona (Italy), National Research Council (CNR)Institute for Biological Resources and Marine Biotechnologies (IRBIM) of Ancona (Italy), National Research Council (CNR)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.https://doi.org/10.1038/s41598-021-88542-8 |
| spellingShingle | 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 Scientific Reports |
| title | 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_short | 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 |
| url | https://doi.org/10.1038/s41598-021-88542-8 |
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