Titre :

Testing the vulnerability of juvenile sea bass (Dicentrarchus labrax) exposed to the harmful algal bloom (HAB) species Pseudo-nitzschia delicatissima

Auteur(s) :

Delegrange, Alice [Auteur]
Université du Littoral Côte d'Opale [ULCO]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Vincent, Dorothée [Auteur]
Université du Littoral Côte d'Opale [ULCO]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Courcot, Lucie [Auteur]
Université du Littoral Côte d'Opale [ULCO]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Amara, Rachid [Auteur]
Université du Littoral Côte d'Opale [ULCO]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]

Titre de la revue :

Aquaculture

Pagination :

167-174

Éditeur :

Elsevier

Date de publication :

2015-02-01

ISSN :

0044-8486

Mot(s)-clé(s) en anglais :

Growth
Condition
Dicentrarchus labrax
Pseudo-nitzschia delicatissima
Exposure experiment
Harmful algal bloom

Discipline(s) HAL :

Planète et Univers [physics]/Sciences de la Terre/Océanographie

Résumé en anglais : [en]

A 45-day exposure experiment was carried out to assess whether the harmful algal blooming Pseudo-nitzschia delicatissima (i.e. needle shaped diatom and potential domoic acid producer) is involved in recurrent mass mortality ...
Lire la suite >A 45-day exposure experiment was carried out to assess whether the harmful algal blooming Pseudo-nitzschia delicatissima (i.e. needle shaped diatom and potential domoic acid producer) is involved in recurrent mass mortality events at a coastal fish farm in the southern North Sea. Juvenile sea bass (Dicentrarchus labrax) were exposed to different concentrations of P. delicatissima, ranging from 1 × 106 to 5 × 106 cells L− 1. Despite exposure to high concentrations of P. delicatissima, sea bass weight and length based growth rates (0.05 ± 0.02 g d− 1 and 0.18 ± 0.05 mm d− 1, respectively) and condition (Fulton K = 0.98 ± 0.06 mg mm− 3) were not significantly reduced suggesting that the fish were not affected during the 45-day exposure period. However, signs of gill mucosa irritation (i.e. mucus overproduction) were observed, showing that this diatom induced a mechanical stress, which can affect gill functions or increase susceptibility of fish to secondary infections (e.g. bacterial and viral infections, parasitism). Results are discussed with regard to consequences for wild and farmed fish, and possible synergic noxious effects when P. delicatissima is associated with other potentially harmful taxa (e.g. Phaeocystis globosa) during the phytoplankton spring bloom in the eastern English Channel–North Sea ecosystem.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL