There is an increased interest worldwide in developing land-based closed systems to cultivate the abalone, Haliotis tuberculata L. Here, we analyzed whether artificial conditions, and particularly the use of artificial seawater,might affect sheltering, a critical behavior of this species. The study was composed of two experiments. In the first, we compared sheltering between two groups of 100 individuals each reared in either natural or artificial seawater. For 15 days, a scorewas assigned every day to the position occupied by each individual, i.e. “0” when it was out of the hide, “1” when it was on the bottom of the maintenance tank underneath the hide, and “2” when it occupied the inner spot of the hide. Our results show that artificial seawater significantly affects sheltering: only the individuals reared in natural seawater were able to reach the hide andmaintain a position in it. Chemical analyses revealed that artificial seawater differed from natural seawater for a relatively low concentration of Ca2+. In the second experiment we compared H. tuberculata's sheltering behavior in three media, natural, artificial, and calcium-enriched artificial seawater. Sheltering was restored in enriched artificial seawater, which supports the hypothesis that calcium has an effect on this species' behavior. However, calcium concentration both in the artificial and “natural”water showed a progressive decreasewith time likely due to the absorption by abalones, which suggests that in closed systems calciumsupply is constantly required, even when the used medium is natural seawater.

Sheltering behavior of the abalone, Haliotis tuberculata L., in artificial and natural seawater: the role of calcium / F. CENNI; G. PARISI; F. SCAPINI; F. GHERARDI. - In: AQUACULTURE. - ISSN 0044-8486. - STAMPA. - 299:(2010), pp. 67-72. [10.1016/j.aquaculture.2009.11.016]

Sheltering behavior of the abalone, Haliotis tuberculata L., in artificial and natural seawater: the role of calcium.

PARISI, GIULIANA;SCAPINI, FELICITA;GHERARDI, FRANCESCA
2010

Abstract

There is an increased interest worldwide in developing land-based closed systems to cultivate the abalone, Haliotis tuberculata L. Here, we analyzed whether artificial conditions, and particularly the use of artificial seawater,might affect sheltering, a critical behavior of this species. The study was composed of two experiments. In the first, we compared sheltering between two groups of 100 individuals each reared in either natural or artificial seawater. For 15 days, a scorewas assigned every day to the position occupied by each individual, i.e. “0” when it was out of the hide, “1” when it was on the bottom of the maintenance tank underneath the hide, and “2” when it occupied the inner spot of the hide. Our results show that artificial seawater significantly affects sheltering: only the individuals reared in natural seawater were able to reach the hide andmaintain a position in it. Chemical analyses revealed that artificial seawater differed from natural seawater for a relatively low concentration of Ca2+. In the second experiment we compared H. tuberculata's sheltering behavior in three media, natural, artificial, and calcium-enriched artificial seawater. Sheltering was restored in enriched artificial seawater, which supports the hypothesis that calcium has an effect on this species' behavior. However, calcium concentration both in the artificial and “natural”water showed a progressive decreasewith time likely due to the absorption by abalones, which suggests that in closed systems calciumsupply is constantly required, even when the used medium is natural seawater.
2010
299
67
72
F. CENNI; G. PARISI; F. SCAPINI; F. GHERARDI
File in questo prodotto:
File Dimensione Formato  
CenniEtAl_Aquaculture2010.pdf

Accesso chiuso

Tipologia: Versione finale referata (Postprint, Accepted manuscript)
Licenza: Tutti i diritti riservati
Dimensione 527.99 kB
Formato Adobe PDF
527.99 kB Adobe PDF   Richiedi una copia

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/370771
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 11
social impact