Optimizing Growth and Rearing Techniques for Larvae and Juveniles of the Sea Cucumber <i>Holothuria arguinensis</i>
The ever-growing demand for sea cucumbers is a threat to these echinoderms and their habitats; however, a way to relieve stock pressure lies in meeting demand through aquaculture. As such, this study aimed to improve the growth and survival percentage of <i>Holothuria arguinensis</i> dur...
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MDPI AG
2023-05-01
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| Online Access: | https://www.mdpi.com/1424-2818/15/6/722 |
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| author | João Sousa Pedro M. Félix Ana C. Brito Eliana Venâncio Francisco Azevedo e Silva Tomás Simões Ana Amorim Maria Luísa Dâmaso-Rodrigues Ana Pombo |
| author_facet | João Sousa Pedro M. Félix Ana C. Brito Eliana Venâncio Francisco Azevedo e Silva Tomás Simões Ana Amorim Maria Luísa Dâmaso-Rodrigues Ana Pombo |
| author_sort | João Sousa |
| collection | DOAJ |
| description | The ever-growing demand for sea cucumbers is a threat to these echinoderms and their habitats; however, a way to relieve stock pressure lies in meeting demand through aquaculture. As such, this study aimed to improve the growth and survival percentage of <i>Holothuria arguinensis</i> during larval development, settlement and juvenile growth. Three diets of microalgae (Diet RbPt <i>= Rhodomonas baltica</i> + <i>Phaeodactylum tricornutum</i>; Diet RbSm = <i>Rhodomonas baltica</i> + <i>Skeletonema marinoi</i>; Diet RbCc = <i>Rhodomonas baltica</i> + <i>Chaetoceros calcitrans</i>) were administered daily to the larval phase. Additionally, three substrates were supplied (pvc rolls, wavy pvc plaques and tile) at three different depths in order to determine the most favourable for settlement. Lastly, the potential benefits on growth and survival from introducing macroalgae (<i>Sacchoriza polyschides</i>) in the juvenile diet were assessed over a period of 6 months. Despite larvae under diet RbPt having presented a larger mean width, <i>H. arguinensis</i> fed with Diet RbCc presented a higher settlement survival at the end of the trial. No preferences were noted among the tested substrates, regardless of diet. Lastly, juveniles with added <i>S. polyschides</i> in their diet showed increased growth in mean weight and length when compared to individuals that were not fed with this seaweed. |
| first_indexed | 2024-03-11T02:34:50Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1424-2818 |
| language | English |
| last_indexed | 2024-03-11T02:34:50Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diversity |
| spelling | doaj.art-833726fb2bb448469f2836668587e13a2023-11-18T10:02:36ZengMDPI AGDiversity1424-28182023-05-0115672210.3390/d15060722Optimizing Growth and Rearing Techniques for Larvae and Juveniles of the Sea Cucumber <i>Holothuria arguinensis</i>João Sousa0Pedro M. Félix1Ana C. Brito2Eliana Venâncio3Francisco Azevedo e Silva4Tomás Simões5Ana Amorim6Maria Luísa Dâmaso-Rodrigues7Ana Pombo8MARE–Marine and Environmental Sciences Centre/ARNET, ESTM, Polytechnic Institute of Leiria, 2520-630 Peniche, PortugalMARE–Marine and Environmental Sciences Centre/ARNET, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, PortugalMARE–Marine and Environmental Sciences Centre/ARNET, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, PortugalMARE–Marine and Environmental Sciences Centre/ARNET, ESTM, Polytechnic Institute of Leiria, 2520-630 Peniche, PortugalMARE–Marine and Environmental Sciences Centre/ARNET, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, PortugalMARE–Marine and Environmental Sciences Centre/ARNET, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, PortugalMARE–Marine and Environmental Sciences Centre/ARNET, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, PortugalMARE–Marine and Environmental Sciences Centre/ARNET, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, PortugalMARE–Marine and Environmental Sciences Centre/ARNET, ESTM, Polytechnic Institute of Leiria, 2520-630 Peniche, PortugalThe ever-growing demand for sea cucumbers is a threat to these echinoderms and their habitats; however, a way to relieve stock pressure lies in meeting demand through aquaculture. As such, this study aimed to improve the growth and survival percentage of <i>Holothuria arguinensis</i> during larval development, settlement and juvenile growth. Three diets of microalgae (Diet RbPt <i>= Rhodomonas baltica</i> + <i>Phaeodactylum tricornutum</i>; Diet RbSm = <i>Rhodomonas baltica</i> + <i>Skeletonema marinoi</i>; Diet RbCc = <i>Rhodomonas baltica</i> + <i>Chaetoceros calcitrans</i>) were administered daily to the larval phase. Additionally, three substrates were supplied (pvc rolls, wavy pvc plaques and tile) at three different depths in order to determine the most favourable for settlement. Lastly, the potential benefits on growth and survival from introducing macroalgae (<i>Sacchoriza polyschides</i>) in the juvenile diet were assessed over a period of 6 months. Despite larvae under diet RbPt having presented a larger mean width, <i>H. arguinensis</i> fed with Diet RbCc presented a higher settlement survival at the end of the trial. No preferences were noted among the tested substrates, regardless of diet. Lastly, juveniles with added <i>S. polyschides</i> in their diet showed increased growth in mean weight and length when compared to individuals that were not fed with this seaweed.https://www.mdpi.com/1424-2818/15/6/722aquacultureHolothuroideasettlement structuresmacroalgal diet<i>Sacchoriza polyschides</i>microalgae diets |
| spellingShingle | João Sousa Pedro M. Félix Ana C. Brito Eliana Venâncio Francisco Azevedo e Silva Tomás Simões Ana Amorim Maria Luísa Dâmaso-Rodrigues Ana Pombo Optimizing Growth and Rearing Techniques for Larvae and Juveniles of the Sea Cucumber <i>Holothuria arguinensis</i> Diversity aquaculture Holothuroidea settlement structures macroalgal diet <i>Sacchoriza polyschides</i> microalgae diets |
| title | Optimizing Growth and Rearing Techniques for Larvae and Juveniles of the Sea Cucumber <i>Holothuria arguinensis</i> |
| title_full | Optimizing Growth and Rearing Techniques for Larvae and Juveniles of the Sea Cucumber <i>Holothuria arguinensis</i> |
| title_fullStr | Optimizing Growth and Rearing Techniques for Larvae and Juveniles of the Sea Cucumber <i>Holothuria arguinensis</i> |
| title_full_unstemmed | Optimizing Growth and Rearing Techniques for Larvae and Juveniles of the Sea Cucumber <i>Holothuria arguinensis</i> |
| title_short | Optimizing Growth and Rearing Techniques for Larvae and Juveniles of the Sea Cucumber <i>Holothuria arguinensis</i> |
| title_sort | optimizing growth and rearing techniques for larvae and juveniles of the sea cucumber i holothuria arguinensis i |
| topic | aquaculture Holothuroidea settlement structures macroalgal diet <i>Sacchoriza polyschides</i> microalgae diets |
| url | https://www.mdpi.com/1424-2818/15/6/722 |
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