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Receveur, Aurore; Kestenare, Elodie; Allain, Valerie; Ménard, Frédéric; Cravatte, Sophie; Lebourges-dhaussy, Anne; Lehodey, Patrick; Mangeas, Morgan; Smith, Neville; Radenac, Marie-hélène; Menkes, Christophe. |
Acoustic data are invaluable information sources for characterizing the distribution and abundance of mid-trophic-level organisms (micronekton). These organisms play a pivotal role in the ecosystem as prey of top predators and as predators of low-trophic-level organisms. Although shipboard-ADCP (acoustic Doppler current profiler) acoustic backscatter signal intensity cannot provide an absolute biomass estimate, it may be a useful proxy to investigate variability in the distribution and relative density of micronekton. This study used acoustic recordings data spread across 19 years (1999–2017) from 54 ADCP cruises in New Caledonia’s subtropical EEZ (exclusive economic zone) to assess seasonal and interannual variabilities and spatial distribution of... |
Tipo: Text |
Palavras-chave: Micronekton; Southwest Pacific ocean; SEAPODYM; Acoustic; Ecosystem. |
Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00609/72078/70794.pdf |
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Sardou, J; Etienne, M; Andersen, V. |
Based on monthly samplings over an entire year, variations of abundance, vertical distributions and diel vertical migrations are described in the 0-1000 m water column in a coastal area of the Northwestern Mediterranean Sea for the main pelagic invertebrates. Detailed results are given for 21 species of macrozooplankton and micronekton. On an annual basis, the most numerous species by numbers comprised the euphausiid Meganyctiphanes norvegica, the pteropod Cavolinia inflexa, the siphonophores Abylopsis tetragona and Chelophyes appendiculata, the crustacean decapods Sergestes arcticus and Pasiphaea sivado, and the salps Salpa fusiformis and Thalia democratica. Species of the same genus, such as Sergestes arcticus, S. corniculum and S. robustus or Pasiphaea... |
Tipo: Text |
Palavras-chave: Seasonal cycle; Vertical distribution; Macroplankton; Micronekton. |
Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00096/20732/18369.pdf |
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Andersen, V; Francois, F; Sardou, J; Picheral, M; Scotto, M; Nival, Paul. |
Vertical distributions and diel migrations at nineteen stations located in the Ligurian and Tyrrhenian Seas (northwestem Mediterranean) are described in detail and compared for the main species of micronekton and macroplankton. Sampling was performed in April 1994 in the 0-700 m water column in most cases, down to 350, 450 or 550 m for the coastal or relatively shallow sites. Most of the twenty species showed similar distributions throughout the sampled area, either non-diel-migrating distributions such as the euphausiid Stylocheiron longicorne and the fish Cyclothone braueri, or clear diel-migrant behaviour (e.g. the siphonophore Chelophyes appendiculata and the euphausiid Euphausia krohni). Four species, the siphonophore Lensia conoidea, the pteropods... |
Tipo: Text |
Palavras-chave: Distribution verticale; Macroplancton; Micronecton; Mer Méditerranée; Mer Tyrrhénienne; Vertical distribution; Macroplankton; Micronekton; Mediterranean Sea; Tyrrhenian Sea. |
Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00325/43650/43222.pdf |
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