Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

 

Publications des scientifiques de l'IRD

Thébault Julien, Chauvaud L., Clavier J., Fichez Renaud, Morize Eric. (2006). Evidence of a 2-day periodicity of striae formation in the tropical scallop Comptopallium radula using calcein marking. Marine Biology, 149 (2), 257-267. ISSN 0025-3162

Accès réservé (Intranet IRD) Demander le PDF

Lien direct chez l'éditeur doi:10.1007/s00227-005-0198-8

En Libre Accès sur HAL http://hal.archives-ouvertes.fr/hal-00449282/fr/

Titre
Evidence of a 2-day periodicity of striae formation in the tropical scallop Comptopallium radula using calcein marking
Année de publication2006
Type de documentArticle référencé dans le Web of Science WOS:000237190200012
AuteursThébault Julien, Chauvaud L., Clavier J., Fichez Renaud, Morize Eric.
SourceMarine Biology, 2006, 149 (2), p. 257-267. ISSN 0025-3162
RésuméThe periodicity of striae formation in the tropical scallop Comptopallium radula (Indo-West Pacific Ocean) was investigated with an in situ marking technique, using the calcein fluorochrome. To minimize scallop stress caused by excessive handling, in situ benthic chambers were used for marking experiments. Once marked, scallops (shell height range: 38.4-75.8 mm) remained on site in a large benthic enclosure and were collected at regular time intervals to count new striae formed after marking, over a period of 3 months. A 3-h exposure period with calcein (150 mg l(-1)) was sufficiently long to create a detectable mark in nearly shells. It was, however, impossible to count the striae in 48.2% of the shells (mainly large specimens) because of a very small growth after marking. Lack of significant mortality during the experiments indicated that tested calcein concentrations were not lethal. A decrease in shell growth rate was observed after marking but the respective impacts of calcein toxicity and changes in environmental conditions could not be discriminated. Our results suggest that in situ calcein marking inside benthic chambers is suitable for shell growth studies of scallops, provided the latter are not too old. After marking, the juvenile C. radula formed an average of one stria every 2.1 days in summer. Reports of 2-day periodicity in biological rhythms are rare. Striae formation in C. radula may be controlled by an endogenous oscillator, synchronized by an environmental cue acting as a zeitgeber, such as seawater temperature or sea level pressure, both of which exhibit 2-day variations in the Pacific Ocean. As in many other scallop species, C. radula forms striae periodically under natural conditions, but this study shows that in pectinid juveniles, this periodicity can deviate from a daily cycle. These results suggest that C. radula shells have tremendous potential for recording environmental conditions during periods ranging from months to a few years and with a resolution of 2 days.
Plan de classementLimnologie biologique / Océanographie biologique [034]
LocalisationFonds IRD [F B010035635] ; Nouméa
Identifiant IRDfdi:010035635
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010035635

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Cayenne

Nouméa

Papeete

Abidjan

Dakar

Niamey

Ouagadougou

Tunis

La Paz

Quito