Age and Growth of Striped Venus Clam Chamelea gallina (Linnaeus, 1758) in the Mid-Western Adriatic Sea: A Comparison of Three Laboratory Techniques
Age and growth studies provide critical data for clam fishery management. Three aging techniques, thin sections and acetate peel replicas – which involve shell sectioning – and surface growth rings were used to estimate the age and growth of Chamelea gallina populations in the mid-western Adriatic S...
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Frontiers Media S.A.
2020-09-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fmars.2020.582703/full |
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| author | Giada Bargione Giada Bargione Claudio Vasapollo Fortunata Donato Massimo Virgili Andrea Petetta Andrea Petetta Alessandro Lucchetti |
| author_facet | Giada Bargione Giada Bargione Claudio Vasapollo Fortunata Donato Massimo Virgili Andrea Petetta Andrea Petetta Alessandro Lucchetti |
| author_sort | Giada Bargione |
| collection | DOAJ |
| description | Age and growth studies provide critical data for clam fishery management. Three aging techniques, thin sections and acetate peel replicas – which involve shell sectioning – and surface growth rings were used to estimate the age and growth of Chamelea gallina populations in the mid-western Adriatic Sea. Their results were compared to identify the most reliable and least time-consuming approach. There were no significant differences between the two shell sectioning techniques (χ2 = 4.66, df = 3, p = 0.198), which were described by the same von Bertalanffy (VBF) growth curve parameters (L8 = 43.9, k = 0.26, t0 = −0.84), whereas significantly different L8 and k values were found between the two shell sectioning techniques and surface growth rings (L8: χ2 = 13.62, df = 1, p < 0.001; k: χ2 = 9.18, df = 1, p < 0.002; these statistics refer to the comparison between acetate peels and surface growth rings). The latter approach proved unreliable and error-prone, as it underestimated age and overestimated the growth rate (L8 = 26.4, k = 1.91, t0 = −0.11). Although the thin sections and acetate peel techniques both provide reliable age and growth estimates, the former approach was less time-consuming. Our analyses demonstrated that shell growth is slower in the cold season and in older specimens and that it has slowed down over the past few decades. |
| first_indexed | 2024-12-12T09:13:35Z |
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| id | doaj.art-abace92ff8d046919f06e6124e174f76 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-12T09:13:35Z |
| publishDate | 2020-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-abace92ff8d046919f06e6124e174f762022-12-22T00:29:27ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452020-09-01710.3389/fmars.2020.582703582703Age and Growth of Striped Venus Clam Chamelea gallina (Linnaeus, 1758) in the Mid-Western Adriatic Sea: A Comparison of Three Laboratory TechniquesGiada Bargione0Giada Bargione1Claudio Vasapollo2Fortunata Donato3Massimo Virgili4Andrea Petetta5Andrea Petetta6Alessandro Lucchetti7Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, ItalyInstitute for Biological Resources and Marine Biotechnologies, National Research Council, Ancona, ItalyInstitute for Biological Resources and Marine Biotechnologies, National Research Council, Ancona, ItalyInstitute for Biological Resources and Marine Biotechnologies, National Research Council, Ancona, ItalyInstitute for Biological Resources and Marine Biotechnologies, National Research Council, Ancona, ItalyDepartment of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, ItalyInstitute for Biological Resources and Marine Biotechnologies, National Research Council, Ancona, ItalyInstitute for Biological Resources and Marine Biotechnologies, National Research Council, Ancona, ItalyAge and growth studies provide critical data for clam fishery management. Three aging techniques, thin sections and acetate peel replicas – which involve shell sectioning – and surface growth rings were used to estimate the age and growth of Chamelea gallina populations in the mid-western Adriatic Sea. Their results were compared to identify the most reliable and least time-consuming approach. There were no significant differences between the two shell sectioning techniques (χ2 = 4.66, df = 3, p = 0.198), which were described by the same von Bertalanffy (VBF) growth curve parameters (L8 = 43.9, k = 0.26, t0 = −0.84), whereas significantly different L8 and k values were found between the two shell sectioning techniques and surface growth rings (L8: χ2 = 13.62, df = 1, p < 0.001; k: χ2 = 9.18, df = 1, p < 0.002; these statistics refer to the comparison between acetate peels and surface growth rings). The latter approach proved unreliable and error-prone, as it underestimated age and overestimated the growth rate (L8 = 26.4, k = 1.91, t0 = −0.11). Although the thin sections and acetate peel techniques both provide reliable age and growth estimates, the former approach was less time-consuming. Our analyses demonstrated that shell growth is slower in the cold season and in older specimens and that it has slowed down over the past few decades.https://www.frontiersin.org/article/10.3389/fmars.2020.582703/fullstriped venus clamagegrowththin sectionsacetate peelssurface growth rings |
| spellingShingle | Giada Bargione Giada Bargione Claudio Vasapollo Fortunata Donato Massimo Virgili Andrea Petetta Andrea Petetta Alessandro Lucchetti Age and Growth of Striped Venus Clam Chamelea gallina (Linnaeus, 1758) in the Mid-Western Adriatic Sea: A Comparison of Three Laboratory Techniques Frontiers in Marine Science striped venus clam age growth thin sections acetate peels surface growth rings |
| title | Age and Growth of Striped Venus Clam Chamelea gallina (Linnaeus, 1758) in the Mid-Western Adriatic Sea: A Comparison of Three Laboratory Techniques |
| title_full | Age and Growth of Striped Venus Clam Chamelea gallina (Linnaeus, 1758) in the Mid-Western Adriatic Sea: A Comparison of Three Laboratory Techniques |
| title_fullStr | Age and Growth of Striped Venus Clam Chamelea gallina (Linnaeus, 1758) in the Mid-Western Adriatic Sea: A Comparison of Three Laboratory Techniques |
| title_full_unstemmed | Age and Growth of Striped Venus Clam Chamelea gallina (Linnaeus, 1758) in the Mid-Western Adriatic Sea: A Comparison of Three Laboratory Techniques |
| title_short | Age and Growth of Striped Venus Clam Chamelea gallina (Linnaeus, 1758) in the Mid-Western Adriatic Sea: A Comparison of Three Laboratory Techniques |
| title_sort | age and growth of striped venus clam chamelea gallina linnaeus 1758 in the mid western adriatic sea a comparison of three laboratory techniques |
| topic | striped venus clam age growth thin sections acetate peels surface growth rings |
| url | https://www.frontiersin.org/article/10.3389/fmars.2020.582703/full |
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