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Notes on the feeding habits of Gaidropsarus guttatus (Collett, 1890) from Faial Island, Azores, NE Atlantic, PT
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Abstract(s)
Gaidropsarus guttatus est un prédateur nocturne des fonds rocheux des îles de Macaronésie. Il n’existe pas d’étude sur l’écologie alimentaire de cette espèce et cet article apporte les toutes premières informations, sur la base d’un échantillon de 82 individus capturés à l’île de Faial, aux Açores (Portugal). Les prélèvements ont été réalisés entre août 1997 et avril 1999 dans des mares intertidales et en zone subtidale jusqu’à une profondeur de 10 m. Sur les 82 spécimens collectés, 95% d’entre eux présentaient des aliments dans l’estomac, totalisant 303 proies de 11 taxons différents. Les proies les plus fréquentes étaient des décapodes (45%), notamment le crabe Pachygrapsus marmoratus (24%). Les poissons téléostéens représentaient 17% de toutes les proies identifiées. La présence significative de proies benthiques et d’algues dans les contenus stomacaux de G. guttatus suggèrent que cette espèce est un prédateur opportuniste qui utilise la succion pour capturer ses proies.
ABSTRACT: Gaidropsarus guttatus is a nocturnal predator that dwells in rocky bottoms of Macaronesian coastal areas. There are no studies as yet on the feeding ecology of this species. This paper describes the feeding habits of this quite unknown species, based on a sample from Faial Island, Azores, Portugal. This sample is composed of 82 specimens collected between August 1997 and April 1999, both in intertidal pools and sub-tidal shallow waters (max. depth 10 m). 95% of sampled stomachs contained food items totaling 303 preys from 11 different taxa. Most important items were decapoda (45%), from which Pachygrapsus marmoratus (24%) showed to be clearly a dominant prey. Teleost fish represented 17% of all prey items. The significant presence of benthonic species and algae in their stomach contents do suggest that G. guttatus is an opportunistic suction feeder predator.
ABSTRACT: Gaidropsarus guttatus is a nocturnal predator that dwells in rocky bottoms of Macaronesian coastal areas. There are no studies as yet on the feeding ecology of this species. This paper describes the feeding habits of this quite unknown species, based on a sample from Faial Island, Azores, Portugal. This sample is composed of 82 specimens collected between August 1997 and April 1999, both in intertidal pools and sub-tidal shallow waters (max. depth 10 m). 95% of sampled stomachs contained food items totaling 303 preys from 11 different taxa. Most important items were decapoda (45%), from which Pachygrapsus marmoratus (24%) showed to be clearly a dominant prey. Teleost fish represented 17% of all prey items. The significant presence of benthonic species and algae in their stomach contents do suggest that G. guttatus is an opportunistic suction feeder predator.
Description
Copyright © 2014 Société Française d’Ichtyologie.
Keywords
Feeding Habits Lotidae Macaronesian Endemic Fish Gaidropsarus guttatus
Pedagogical Context
Citation
Ávila, M.; Nunes, D.; Machado, L. F.; Barreiros, J. P. (2014). "Notes on the feeding habits of Gaidropsarus guttatus (Collett, 1890) from Faial Island, Azores, NE Atlantic, PT". Cybium – International Journal of Ichthyology, 38(1): 77-80. ISSNe 2101-0315.
Publisher
Société Française d’Ichtyologie