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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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| Receveur, Aurore; Vourey, Elodie; Lebourges-dhaussy, Anne; Menkes, Christophe; Menard, Frederic; Allain, Valerie. |
| Mesopelagic resources are central to the ecosystem but remain poorly studied mainly due to the lack of observations. This paper investigates the assemblages of micronekton organisms and their habitat in the Natural Park of the Coral Sea around New Caledonia (southwest Pacific) using data from 141 pelagic trawls. A total of 67,130 micronekton individuals (fish, crustaceans, and mollusks) were collected with 252 species identified among 152 genus and 76 families. In the analyses, we focused on 22 species; each were present in more than 33 trawls (i.e., in more than 25% of the total number of trawls) and studied their spatial distribution and vertical dynamic behavior. Community structure was investigated through region of common profile (RCP), an innovative... |
| Tipo: Text |
Palavras-chave: Diversity; Southwest Pacific Ocean; Mesopelagic zone; Region of common profile; Diel vertical migration; Pelagic trawl. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00644/75563/76480.pdf |
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| Garrigue, Claire; Bonneville, Claire; Derville, Solène; Allain, Valérie; Aucan, Jérôme; Bourgogne, Hugo; Bachelier, Celine; Dutheil, Cyril; Grelet, Jacques; Laran, Sophie; Menkes, Christophe; Niksic, Sara; Pallin, Logan; Pérard, Véronique; Portal, Annie; Receveur, Aurore; Renaud, Armelle; Roger, Jean; Varillon, David; Vourey, Elodie. |
| En 2014 le gouvernement de la Nouvelle-Caledonie a cree le parc naturel de la mer de Corail, l'une des plus grandes zones protegees au monde. Afin de renseigner les zones de conservation prioritaires et de faciliter la mise en place de mesures qui puissent efficacement proteger la megafaune marine, il est necessaire d'acquerir des informations sur sa distribution et l'usage des habitats. C'est pourquoi en 2016, l'IRD a lance le programme WHERE1 qui vise a explorer la distribution spatiale et l'habitat des baleines a bosse pour ameliorer leur gestion spatiale dans le parc naturel de la mer de Corail. Les principaux objectifs du programme WHERE consistent a etablir la distribution des baleines a bosse au sein du parc naturel de la mer de Corail, a evaluer la... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00611/72338/71167.pdf |
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