Trophic ecology of the emerald notothen Trematomus bernacchii (Pisces, Nototheniidae) from Terra Nova Bay, Ross Sea, Antarctica (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Trophic ecology of the emerald notothen Trematomus bernacchii (Pisces, Nototheniidae) from Terra Nova Bay, Ross Sea, Antarctica (Articolo in rivista) (literal)

Anno

• 2004-01-01T00:00:00+01:00 (literal)

Alternative label

• La Mesa M. (1), Dalu M. (2), Vacchi M. (2004)
  Trophic ecology of the emerald notothen Trematomus bernacchii (Pisces, Nototheniidae) from Terra Nova Bay, Ross Sea, Antarctica
  in Polar biology (Print)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• La Mesa M. (1), Dalu M. (2), Vacchi M. (literal)

Pagina inizio

• 721 (literal)

Pagina fine

• 728 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni

• Issue Volume 27, Number 11 / October, 2004 DOI 10.1007/s00300-004-0645-x (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 27 (literal)

Rivista

• Polar biology (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• (1)ISMAR-CNR, Istituto di Scienze Marine, Sezione Pesca Marittima, Largo Fiera della Pesca, 60125 Ancona, Italy (2)ICRAM, Istituto Centrale per la Ricerca Scientifica e Tecnologica Applicata al Mare, Via Casalotti 300, 00166 Rome, Italy (literal)

Titolo

• Trophic ecology of the emerald notothen Trematomus bernacchii (Pisces, Nototheniidae) from Terra Nova Bay, Ross Sea, Antarctica (literal)

Abstract

• The trophic ecology of the emerald notothen Trematomus bernacchii was investigated using a sample of 284 specimens collected in the coastal waters of Terra Nova Bay (Ross Sea) during the summer season 1990¡V1991. The stomach-content analysis provided data on feeding habits and trophic niche breadth. Overall, 72 taxa of food items were identified; the most important as prey were infaunal and epifaunal polychaetes, amphipods and molluscs. Food of secondary importance comprised isopods, pycnogonids, fish and fish eggs. Several other taxa, such as euphausiids, mysids, decapods, echinoids, holothurians, priapulids and thaliaceans constituted food eaten in very small amounts and only occasionally. On the basis of their diet, T. bernacchii can be considered generalized feeders, with a wide niche breadth composed almost exclusively of benthic organisms. A cluster analysis was conducted to compare stomach-content data of subsamples selected on the basis of fish size and sampling depth, aiming to determine diet diversity and niche breadth, as well as factors involved in reducing intraspecific competition for food resources. Diet was different for fish sampled in shallow („T90 m depth) and deeper waters (>90 m depth): while the first group fed mostly on bivalves (Adamussium colbecki) and amphipods, the latter preferred infaunal-epifaunal polychaetes. Conversely, fish size did not contribute significantly to diet diversification. According to our data and published data on feeding behaviour and sensory ecology, we conclude that in this species the intraspecific competition for food is reduced, either through habitat heterogeneity or different foraging strategies. (literal)

Prodotto di

• Marine science institute (ISMAR) (Istituto)
• Ruolo degli ambienti estremi nei processi climatici globali (TA.P02.006.008) (Modulo)
• Conoscenza del livello di funzionalità degli ecosistemi marini soggetti ad attività antropiche e a sfruttamento sostenibile delle risorse (TA.P04.007.001) (Modulo)

Autore CNR

• MARIO LA MESA (Persona)

Insieme di parole chiave

• Parole chiave di "Trophic ecology of the emerald notothen Trematomus bernacchii (Pisces, Nototheniidae) from Terra Nova Bay, Ross Sea, Antarctica" (Insieme di parole chiave)

Incoming links:

Prodotto

• Marine science institute (ISMAR) (Istituto)
• Conoscenza del livello di funzionalità degli ecosistemi marini soggetti ad attività antropiche e a sfruttamento sostenibile delle risorse (TA.P04.007.001) (Modulo)
• Ruolo degli ambienti estremi nei processi climatici globali (TA.P02.006.008) (Modulo)

Autore CNR di

• MARIO LA MESA (Persona)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Polar biology (Rivista)

Insieme di parole chiave di

• Parole chiave di "Trophic ecology of the emerald notothen Trematomus bernacchii (Pisces, Nototheniidae) from Terra Nova Bay, Ross Sea, Antarctica" (Insieme di parole chiave)