Advances in Aquaculture Hatchery Techniques of Sea Urchin <i>Sphaerechinus granularis</i> (Lamarck, 1816) (Echinoidea: Toxopneustidae): Broodstock Conditioning and Spawning Induction
In response to the growing demand for sea urchin gonads (roe or uni) in Asian and European markets and the concerns regarding the overexploitation of wild populations, this preliminary study addresses the need for cost-effective protocols in echinoculture. The primary focus of this research was to e...
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MDPI AG
2023-11-01
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| Series: | Life |
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| Online Access: | https://www.mdpi.com/2075-1729/13/11/2233 |
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| author | Ricardo Luís Ricardo José João Castro Carlos Andrade |
| author_facet | Ricardo Luís Ricardo José João Castro Carlos Andrade |
| author_sort | Ricardo Luís |
| collection | DOAJ |
| description | In response to the growing demand for sea urchin gonads (roe or uni) in Asian and European markets and the concerns regarding the overexploitation of wild populations, this preliminary study addresses the need for cost-effective protocols in echinoculture. The primary focus of this research was to evaluate the gonadosomatic index (GI) in captive-conditioned <i>Sphaerechinus granularis</i> over a five-month period and compare it with that of their wild-caught conspecifics. Additionally, two different spawning induction methods were assessed: potassium chloride (KCl) injection and agitation. Results indicate that captive-conditioned sea urchins exhibit significantly higher GI values when compared to their wild-caught counterparts. Furthermore, it was observed that the agitation method is equally effective as the KCl injection in triggering a positive response, i.e., gamete ejection, while maintaining lower mortality rates among the subjected <i>S. granularis</i>. In conclusion, this preliminary study underscores the pivotal role of broodstock conditioning in supporting the sustainability of sea urchin aquaculture. Moreover, the spawning induction method through agitation emerges as a viable alternative to the traditional intracelomic KCl injection, offering comparable efficacy without compromising the survival of the broodstock. These findings have significant implications for the development of sustainable sea urchin farming practices. |
| first_indexed | 2024-03-09T16:40:17Z |
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| institution | Directory Open Access Journal |
| issn | 2075-1729 |
| language | English |
| last_indexed | 2024-03-09T16:40:17Z |
| publishDate | 2023-11-01 |
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| series | Life |
| spelling | doaj.art-a2d80a90aae549bf8c6b4efec820c9532023-11-24T14:52:41ZengMDPI AGLife2075-17292023-11-011311223310.3390/life13112233Advances in Aquaculture Hatchery Techniques of Sea Urchin <i>Sphaerechinus granularis</i> (Lamarck, 1816) (Echinoidea: Toxopneustidae): Broodstock Conditioning and Spawning InductionRicardo Luís0Ricardo José1João Castro2Carlos Andrade3MARE—Marine and Environmental Sciences Centre, ARNET—Aquatic Research Network, Regional Agency for the Development of Research, Technology and Innovation (ARDITI), 9020-105 Funchal, PortugalMARE—Marine and Environmental Sciences Centre, ARNET—Aquatic Research Network, Regional Agency for the Development of Research, Technology and Innovation (ARDITI), 9020-105 Funchal, PortugalRegional Agency for the Development of Research, Technology and Innovation (ARDITI), Madeira Tecnopolo, 9020-105 Funchal, PortugalMARE—Marine and Environmental Sciences Centre, ARNET—Aquatic Research Network, Regional Agency for the Development of Research, Technology and Innovation (ARDITI), 9020-105 Funchal, PortugalIn response to the growing demand for sea urchin gonads (roe or uni) in Asian and European markets and the concerns regarding the overexploitation of wild populations, this preliminary study addresses the need for cost-effective protocols in echinoculture. The primary focus of this research was to evaluate the gonadosomatic index (GI) in captive-conditioned <i>Sphaerechinus granularis</i> over a five-month period and compare it with that of their wild-caught conspecifics. Additionally, two different spawning induction methods were assessed: potassium chloride (KCl) injection and agitation. Results indicate that captive-conditioned sea urchins exhibit significantly higher GI values when compared to their wild-caught counterparts. Furthermore, it was observed that the agitation method is equally effective as the KCl injection in triggering a positive response, i.e., gamete ejection, while maintaining lower mortality rates among the subjected <i>S. granularis</i>. In conclusion, this preliminary study underscores the pivotal role of broodstock conditioning in supporting the sustainability of sea urchin aquaculture. Moreover, the spawning induction method through agitation emerges as a viable alternative to the traditional intracelomic KCl injection, offering comparable efficacy without compromising the survival of the broodstock. These findings have significant implications for the development of sustainable sea urchin farming practices.https://www.mdpi.com/2075-1729/13/11/2233<i>Sphaerechinus granularis</i>gonadosomatic indexspawning inductionechinoculture |
| spellingShingle | Ricardo Luís Ricardo José João Castro Carlos Andrade Advances in Aquaculture Hatchery Techniques of Sea Urchin <i>Sphaerechinus granularis</i> (Lamarck, 1816) (Echinoidea: Toxopneustidae): Broodstock Conditioning and Spawning Induction Life <i>Sphaerechinus granularis</i> gonadosomatic index spawning induction echinoculture |
| title | Advances in Aquaculture Hatchery Techniques of Sea Urchin <i>Sphaerechinus granularis</i> (Lamarck, 1816) (Echinoidea: Toxopneustidae): Broodstock Conditioning and Spawning Induction |
| title_full | Advances in Aquaculture Hatchery Techniques of Sea Urchin <i>Sphaerechinus granularis</i> (Lamarck, 1816) (Echinoidea: Toxopneustidae): Broodstock Conditioning and Spawning Induction |
| title_fullStr | Advances in Aquaculture Hatchery Techniques of Sea Urchin <i>Sphaerechinus granularis</i> (Lamarck, 1816) (Echinoidea: Toxopneustidae): Broodstock Conditioning and Spawning Induction |
| title_full_unstemmed | Advances in Aquaculture Hatchery Techniques of Sea Urchin <i>Sphaerechinus granularis</i> (Lamarck, 1816) (Echinoidea: Toxopneustidae): Broodstock Conditioning and Spawning Induction |
| title_short | Advances in Aquaculture Hatchery Techniques of Sea Urchin <i>Sphaerechinus granularis</i> (Lamarck, 1816) (Echinoidea: Toxopneustidae): Broodstock Conditioning and Spawning Induction |
| title_sort | advances in aquaculture hatchery techniques of sea urchin i sphaerechinus granularis i lamarck 1816 echinoidea toxopneustidae broodstock conditioning and spawning induction |
| topic | <i>Sphaerechinus granularis</i> gonadosomatic index spawning induction echinoculture |
| url | https://www.mdpi.com/2075-1729/13/11/2233 |
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