Effects of trophic and environmental conditions on the growth of Crassostrea gigas in culture
In order to study the possibility of exploiting protected marine areas, comparative data on the cultivation of the oyster Cassostrea gigas in the South Tyrrenian Sea are reported. The oysters were cultured at -7 and - 13 m on long lines linked to artificial reefs. The observations, made during a 12-...
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Language: | English |
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Online Access: | http://hdl.handle.net/10447/194478 https://doi.org/10.1016/S0044-8486(97)00009-4 |
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ftunivpalermo:oai:iris.unipa.it:10447/194478 2024-02-11T10:03:16+01:00 Effects of trophic and environmental conditions on the growth of Crassostrea gigas in culture SARA', Gianluca MAZZOLA, Antonio Sarà, G. Mazzola, A. 1997 http://hdl.handle.net/10447/194478 https://doi.org/10.1016/S0044-8486(97)00009-4 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:A1997XT41000008 volume:153 issue:1-2 firstpage:81 lastpage:91 numberofpages:11 journal:AQUACULTURE http://hdl.handle.net/10447/194478 doi:10.1016/S0044-8486(97)00009-4 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0030823531 info:eu-repo/semantics/closedAccess Crassostrea giga Food availability Mariculture Mediterranean Sea Trophic condition Aquatic Science Settore BIO/07 - Ecologia info:eu-repo/semantics/article 1997 ftunivpalermo https://doi.org/10.1016/S0044-8486(97)00009-4 2024-01-23T23:26:29Z In order to study the possibility of exploiting protected marine areas, comparative data on the cultivation of the oyster Cassostrea gigas in the South Tyrrenian Sea are reported. The oysters were cultured at -7 and - 13 m on long lines linked to artificial reefs. The observations, made during a 12-month period, were of the chemical-physical and trophic properties of the water column and growth rates of the oysters. Temperature ranged between 19.81 ± 4.67°C at -7 m and 18.03 ± 3.03°C at - 13 m. Salinity showed typical Mediterranean values. The area presented oligotrophic features: the chlorophyll-a (CHLa) concentration ranged between 0.05 ± 0.01 and 0.04 ± 0.02 μg 1-1 at -7 and -13 m, respectively. The labile particulate organic matter (LPOM) ranged between 344 ± 201 and 334 ± 228 μg 1-1 at -7 and - 13 m, respectively, anti the CHLa carbon/POM carbon ratio (index of the autotrophic vs heterotrophic conditions) was never above 3%. POM concentration and POM gross energy content showed significant differences (P < 0.05) at the two depths, POM bulk being greater at -13 m. The oysters, sampled monthly, had an initial average size of 11.50 ± 2.78 mm (0.0036 ± 0.01 g dry weight) and had reached 47.50 ± 12.30 mm (0.13 ± 0.04 g dry weigh) at -7 m and 41 ± 11.43 mm (0.11 ± 0.04 g dry weight) at -13 m, after 12 months. The length-weight relationship showed the best allometric coefficient for the oysters at -13 m, although the growth trends did not show significant differences. Although a correlation between food quantity and quality and somatic and valvar production in situ was not demonstrated, it is probable that the greater POM bulk at - 13 m was the cause for the better growth trajectories of these specimens. Article in Journal/Newspaper Crassostrea gigas IRIS Università degli Studi di Palermo Aquaculture 153 1-2 81 91 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Palermo |
op_collection_id |
ftunivpalermo |
language |
English |
topic |
Crassostrea giga Food availability Mariculture Mediterranean Sea Trophic condition Aquatic Science Settore BIO/07 - Ecologia |
spellingShingle |
Crassostrea giga Food availability Mariculture Mediterranean Sea Trophic condition Aquatic Science Settore BIO/07 - Ecologia SARA', Gianluca MAZZOLA, Antonio Effects of trophic and environmental conditions on the growth of Crassostrea gigas in culture |
topic_facet |
Crassostrea giga Food availability Mariculture Mediterranean Sea Trophic condition Aquatic Science Settore BIO/07 - Ecologia |
description |
In order to study the possibility of exploiting protected marine areas, comparative data on the cultivation of the oyster Cassostrea gigas in the South Tyrrenian Sea are reported. The oysters were cultured at -7 and - 13 m on long lines linked to artificial reefs. The observations, made during a 12-month period, were of the chemical-physical and trophic properties of the water column and growth rates of the oysters. Temperature ranged between 19.81 ± 4.67°C at -7 m and 18.03 ± 3.03°C at - 13 m. Salinity showed typical Mediterranean values. The area presented oligotrophic features: the chlorophyll-a (CHLa) concentration ranged between 0.05 ± 0.01 and 0.04 ± 0.02 μg 1-1 at -7 and -13 m, respectively. The labile particulate organic matter (LPOM) ranged between 344 ± 201 and 334 ± 228 μg 1-1 at -7 and - 13 m, respectively, anti the CHLa carbon/POM carbon ratio (index of the autotrophic vs heterotrophic conditions) was never above 3%. POM concentration and POM gross energy content showed significant differences (P < 0.05) at the two depths, POM bulk being greater at -13 m. The oysters, sampled monthly, had an initial average size of 11.50 ± 2.78 mm (0.0036 ± 0.01 g dry weight) and had reached 47.50 ± 12.30 mm (0.13 ± 0.04 g dry weigh) at -7 m and 41 ± 11.43 mm (0.11 ± 0.04 g dry weight) at -13 m, after 12 months. The length-weight relationship showed the best allometric coefficient for the oysters at -13 m, although the growth trends did not show significant differences. Although a correlation between food quantity and quality and somatic and valvar production in situ was not demonstrated, it is probable that the greater POM bulk at - 13 m was the cause for the better growth trajectories of these specimens. |
author2 |
Sarà, G. Mazzola, A. |
format |
Article in Journal/Newspaper |
author |
SARA', Gianluca MAZZOLA, Antonio |
author_facet |
SARA', Gianluca MAZZOLA, Antonio |
author_sort |
SARA', Gianluca |
title |
Effects of trophic and environmental conditions on the growth of Crassostrea gigas in culture |
title_short |
Effects of trophic and environmental conditions on the growth of Crassostrea gigas in culture |
title_full |
Effects of trophic and environmental conditions on the growth of Crassostrea gigas in culture |
title_fullStr |
Effects of trophic and environmental conditions on the growth of Crassostrea gigas in culture |
title_full_unstemmed |
Effects of trophic and environmental conditions on the growth of Crassostrea gigas in culture |
title_sort |
effects of trophic and environmental conditions on the growth of crassostrea gigas in culture |
publishDate |
1997 |
url |
http://hdl.handle.net/10447/194478 https://doi.org/10.1016/S0044-8486(97)00009-4 |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:A1997XT41000008 volume:153 issue:1-2 firstpage:81 lastpage:91 numberofpages:11 journal:AQUACULTURE http://hdl.handle.net/10447/194478 doi:10.1016/S0044-8486(97)00009-4 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0030823531 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/S0044-8486(97)00009-4 |
container_title |
Aquaculture |
container_volume |
153 |
container_issue |
1-2 |
container_start_page |
81 |
op_container_end_page |
91 |
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1790599462791413760 |