Diel behavioral rhythms in sablefish (Anoplopoma fimbria) and other benthic species, as recorded by the Deep-sea cabled observatories in Barkley canyon (NEPTUNE-Canada)

Doya, C.; Aguzzi, Jacopo; Pardo, M.A. De Lucas; Matabos, Marjolaine; Costa, Corrado; Mihaly, S. F.; Canals, Miquel

doi:10.1016/j.jmarsys.2013.04.003

Cited by 66 publications

(79 citation statements)

References 45 publications

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“…In addition, canyons may concentrate motile megafauna that leave the adjacent slope in an attempt to evade visual predators by hiding within the complex canyon topography (Farrugio, 2012). Doya et al (2014) recorded high numbers of sablefish (Anoplopoma fimbria) along Barkley canyon walls at approximately 900 m depth from the NEPTUNE Ocean Observatory, Canada. Canyon geomorphology can trap diel vertical migrants, such as hyperiid amphipods and euphausiids, when wind-generated currents push animals toward the canyon heads (Macquart-Moulin and Patriti, 1996).…”

Section: Canyon Effects On Pelagic and Motile Benthic Or Demersal Faunamentioning

confidence: 99%

Ecological Role of Submarine Canyons and Need for Canyon Conservation: A Review

et al. 2017

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Submarine canyons are major geomorphic features of continental margins around the world. Several recent multidisciplinary projects focused on the study of canyons have considerably increased our understanding of their ecological role, the goods, and services they provide to human populations, and the impacts that human activities have on their overall ecological condition. Pressures from human activities include fishing, dumping of land-based mine tailings, and oil and gas extraction. Moreover, hydrodynamic processes of canyons enhance the down-canyon transport of litter. The effects of climate change may modify the intensity of currents. This potential hydrographic change is predicted to impact the structure and functioning of canyon communities as well as affect nutrient supply to the deep-ocean ecosystem. This review not only identifies the ecological status of canyons, and current and future issues for canyon conservation, but also highlights the need for a better understanding of anthropogenic impacts on canyon ecosystems and proposes other research required to inform management measures to protect canyon ecosystems.

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Section: Canyon Effects On Pelagic and Motile Benthic Or Demersal Faunamentioning

confidence: 99%

Ecological Role of Submarine Canyons and Need for Canyon Conservation: A Review

et al. 2017

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“…The influence of lights on invertebrates is unknown, but this issue has recently been raised with the development of observatories and the use of camera systems to study benthic faunal communities (Matabos et al 2011. While a study in the North Pacific showed no influence of the infrastructure on megafaunal abundances (Vardaro et al 2007), it is recognized that light can modify the behavior of certain fish species (Krieger 1997;Widder et al 2005;Doya et al 2013;M. Matabos, personal observations).…”

Section: Discussionmentioning

confidence: 99%

The VENUS cabled observatory as a method to observe fish behaviour and species assemblages in a hypoxic fjord, Saanich Inlet (British Columbia, Canada)

Matabos

Piechaud

MontignyFrançois

et al. 2015

Can. J. Fish. Aquat. Sci.

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Studies reporting processes that may shape marine benthic communities under the seasonal scale are rare at depths >50 m. In this study, the use of the VENUS multidisciplinary cabled observatory provided 2-month high-resolution data combining quantitative biology and environmental data in Saanich Inlet, a seasonally hypoxic fjord located on Vancouver Island (British Columbia, Canada). An ecological module equipped with a camera acquired a 3 min video clip every half hour during 2 months at 97 m depth in the oxygen fluctuation zone of the fjord. Results highlighted the role of the tidal cycle on species activity rhythms and confirmed the influence of oxygen fluctuations on benthic assemblage structure and species behaviour. However, environmental variables considered only explained a small proportion of the total variance in species data. This study demonstrates how seafloor observatories can be used to study species behaviour and community dynamics in relation to abiotic conditions by providing continuous access to multidisciplinary data. Résumé :Les études sur les processus qui influencent la structure des communautés marines benthiques profondes (>50 m) à des échelles inférieures aux saisons sont rares. Dans cet article, l'utilisation de l'observatoire multidisciplinaire câblé VENUS a fourni 2 mois de données haute fréquence combinant des données quantitatives biologiques et environnementales dans le Saanich Inlet, un fjord hypoxique saisonnier localisé sur l'île de Vancouver (Colombie-Britannique, Canada). Un module écologique a enregistré des séquences vidéo de 3 min toutes les demi-heures pendant 2 mois à 97 m de profondeur dans la zone de fluctuation d'oxygène. Les résultats ont permis de mettre en évidence le rôle des cycles de marées sur l'activité rythmique des espèces et ont confirmé le rôle des variations temporelles des concentrations en oxygène sur la structure des assemblages faunistiques et le comportement des espèces benthiques. Cependant, les variables environnementales considérées expliquent une faible proportion de la variance. Cette étude démontre comment les observatoires sous-marins permettent d'étudier le comportement des espèces et la dynamique des communautés benthiques en relation avec les facteurs abiotiques, en fournissant un accès continu à des données multidisciplinaires.

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“…Animals perform long-range, abrupt, and high-energy-demanding diel vertical migrations in the form of nocturnal ascents and diurnal retreats to reduce to the overall mortality risk from visual predators, maximising at the same time their feeding success (Aguzzi and Company, 2010). For the benthos, a similar level of knowledge is not available (Doya et al, 2014;Matabos et al, 2013), as trawl samplings have not yet been performed at different depths on an hourly scheduled fashion with light measurements between consecutive samples (Aguzzi and Company, 2010). While the "isolume concept" (i.e., a light intensity threshold followed by migrants during their diel vertical movement; (Naylor, 2006)) has been applied in the pelagic realm, no extrapolation to the benthos has been attempted.…”

Section: The Role Of Light and Visual Predationmentioning

confidence: 99%