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

IRD

 

Publications des scientifiques de l'IRD

Prokesova M., Stejskal V., Matousek J., Kouril J., Baras Etienne. (2017). Effect of light intensity on early ontogeny of African sharptooth catfish, Clarias gariepinus (Burchell). Aquaculture Research, 48 (1), 347-355. ISSN 1355-557X

Accès réservé (Intranet IRD) Demander le PDF

Lien direct chez l'éditeur doi:10.1111/are.13116

Titre
Effect of light intensity on early ontogeny of African sharptooth catfish, Clarias gariepinus (Burchell)
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000390268300029
AuteursProkesova M., Stejskal V., Matousek J., Kouril J., Baras Etienne.
SourceAquaculture Research, 2017, 48 (1), p. 347-355. ISSN 1355-557X
RésuméLight intensity during the early life stages of fish can have profound effects on their survival, developmental rate, yolk utilization efficiency and body size. Here, these aspects were analysed during two separate experiments (with or without exogenous food) on two distinct progenies of African sharptooth catfish, at five different light intensities (<0.1, 70, 500, 2500 and 8000 Lx; 24L:0D, 27.2 degrees C). The duration of the egg incubation period (from 1.01 to 1.25days post fertilization, dPF) was inversely proportional to light intensity, as hatching took place at more precocious developmental stages with increasing light intensity, i.e. at significantly (P<0.05) shorter body length and slightly more abundant remaining yolk at 8000Lx in comparison to <0.1Lx. At the start of exogenous feeding (4 dPF), most of these differences had vanished. During the period of mixed feeding (until the end of yolk absorption, 11 dPF), growth decreased significantly with increasing light intensity. Daily mortality rates after hatching varied very little between light intensities. Mortality during egg incubation increased significantly (P<0.05) with increasing light intensity, whereas it varied very little between light intensities thereafter, with the best survival rates since fertilization until the end of yolk absorption obtained at intermediate light intensities (70-2500Lx). These results could be useful for improving the performance of African sharptooth catfish hatcheries.
Plan de classementRessources halieutiques [040]
LocalisationFonds IRD [F B010068777]
Identifiant IRDfdi:010068777
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010068777

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