Publications des scientifiques de l'IRD

Bijoux Jude, Dagorn Laurent, Berke G., Cowley P. D., Soria Marc, Gaertner Jean-Claude, Robinson J. (2013). Temporal dynamics, residency and site fidelity of spawning aggregations of a herbivorous tropical reef fish Siganus sutor. Marine Ecology Progress Series, 475, p. 233-247. ISSN 0171-8630.

Titre du document
Temporal dynamics, residency and site fidelity of spawning aggregations of a herbivorous tropical reef fish Siganus sutor
Année de publication
2013
Type de document
Article référencé dans le Web of Science WOS:000314935000018
Auteurs
Bijoux Jude, Dagorn Laurent, Berke G., Cowley P. D., Soria Marc, Gaertner Jean-Claude, Robinson J.
Source
Marine Ecology Progress Series, 2013, 475, p. 233-247 ISSN 0171-8630
The shoemaker spinefoot Siganus sutor is a fast-growing, short-lived, gonochorist and herbivorous reef fish that forms transient fish spawning aggregations (FSAs). In the Seychelles, FSAs of this species occur monthly between September and June around the full moon. To study the spawning aggregation dynamics of S. sutor, 39 reproductively active individuals were acoustically tagged and monitored at 3 known FSA sites (Pate Polite, Pate Desire and Pate Dividi) off the west coast of Praslin island (Seychelles) between October 2010 and April 2011. The presence and absence of tagged fish at the 3 sites were monitored using moored arrays of passive acoustic receivers, while the density of fish at the FSAs was quantified using underwater visual census (UVC). Most tagged fish (87.0%) detected in more than 1 spawning period showed fidelity to single spawning sites. Predominantly, tagged individuals arrived at FSA sites at dawn and departed at dusk. Spawning residency times at FSA sites ranged from 0.02 to 16.1 d. At Pate Polite, residency times were higher in the first half of the spawning season. Residency times were often several-fold shorter than aggregation duration which, when combined with patterns in arrival and departure times, indicates high turnover of fish within aggregations. The findings of this study provide information needed for emerging co-management schemes that aim to sustain this socio-economically important fishery.
Plan de classement
Limnologie biologique / Océanographie biologique [034] ; Ecologie, systèmes aquatiques [036]
Description Géographique
SEYCHELLES
Localisation
Fonds IRD [F B010060698]
Identifiant IRD
fdi:010060698
Contact