Amphiura chiajei Forbes, comensal de Maldane glebifex Grube, en la Ría de Muros (Galicia)

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Contribution of infauna and mussel-raft epifauna to demersal fish diets

The contribution of infauna and mussel-raft epifauna to the diet of 3 dominant species in the demersal fish community of the Ria de Arosa, N. W. Spain - Lesueurigobius friesii (Gobiidae), Callionymus lyra (Callionymidae) and Trisopterus luscus (Gadidae) - was determined. Intense raft mussel culture in the Ria de Arosa supports a rich epifauna which constitutes the main food resource for the fishes studied. In contrast, infauna density is low and contributes only a small proportion to fish diets. Prey consumed was similar in the 3 fish species. Gut contents consisted mainly of the small crab Pisidia longicornis. This decapod is a dominant component of the raft epifauna, and electivity indices indicate that it is selected by the fishes. In the Ria de Pontevedra, which contains fewer mussel rafts, these fish fed on infauna. Thus, one effect of intense mussel aquaculture has been to change the food habits of these 3 fishes from predominantly infauna to raft epifauna diet.versión del edito

Coastal upwelling off the Rías Bajas, Galicia, Northwest Spain. II. Benthic studies

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Coastal upwelling in the Rías Bajas, NW Spain: Contrasting the benthic regimes of Rías de Arosa and de Muros

Versión del editor0,986

Distribución espacial de las comunidades bentónicas infaunales de la Ría de Arosa

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Primeros datos sobre la biomasa y la composición del bentos infaunal de la Ría de Pontevedra, en relación con el contenido en materia orgánica del sedimento

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Estudio preliminar del ictioplancton de la Ría de Arosa

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Primera cita para el litoral de la Península Ibérica del género Aonidella (Polychaeta: Spionidae), con una redescripción de la especie Aonidella dayi Maciolek

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Spatial distribution of the infaunal benthic communities of the Ría de Muros, North-West Spain

Benthic samples were collected at 13 stations in the Ría de Muros, north-west Spain. There are three major communities: (1) in the southern and outer part of the ría, an Amphiura filiformis—Thyone fusus community, inhabiting sandy sediments with low organic content; (2) in the middle part of the ría, and Amphiura chiajei—Maldane glebifex community, inhabiting muddy sediments that are not anoxic (sulphide not detected); (3) in Muros Bay and the inner part of the ría, a Spiochaetopterus costarum community, inhabiting anoxic sediments with high organic content. Biomass is very high (up to 46.2 g ash-free dry wt) in the first two communities. In the Spiochaetopterus costarum community, biomass and diversity are much lower, probably because of oxygen deficiency.2,011

Macrobentos infaunal de la Ría de Pontevedra

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