Journal ArticleDOI
Activity rhythms in the deep-sea: a chronobiological approach.
Jacopo Aguzzi,Corrado Costa,Paolo Menesatti,José A. García,Nixon Bahamon,Pere Puig,Francesc Sardà +6 more
TLDR
This review will focus on the behavioural rhythms of crustacean decapods inhabiting depths where the sun light is absent, and potential scenarios for future research on deep-sea decapod behaviour are suggested by new in situ observation technologies.Abstract:
Ocean waters deeper than 200 m cover 70% of the Earth's surface. Light intensity gets progressively weaker with increasing depth and internal tides or inertial currents may be the only remaining zeitgebers regulating biorhythms in deep-sea decapods. Benthopelagic coupling, exemplified by vertically moving shrimps within the water column, may also act as a source of indirect synchronisation to the day-night cycle for species living in permanently dark areas. At the same time, seasonal rhythms in growth and reproduction may be an exogenous response to spring-summer changes in upper layer productivity (via phytoplankton) or, alternatively, may be provoked by the synchronisation mediated by an endogenous controlling mechanism (via melatonin). In our review, we will focus on the behavioural rhythms of crustacean decapods inhabiting depths where the sun light is absent. Potential scenarios for future research on deep-sea decapod behaviour are suggested by new in situ observation technologies. Permanent video observatories are, to date, one of the most important tools for marine chronobiology in terms of species recognition and animals' movement tracking.read more
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Journal ArticleDOI
The New Seafloor Observatory (OBSEA) for Remote and Long-Term Coastal Ecosystem Monitoring
Jacopo Aguzzi,Antoni Mànuel,Fernando Condal,Jorge Guillén,Marc Nogueras,Joaquin Del Rio,Corrado Costa,Paolo Menesatti,Pere Puig,Francesc Sardà,Daniel Mihai Toma,Albert Palanques +11 more
TL;DR: The recently installed low-cost, multiparametric, expandable, cabled coastal Seafloor Observatory (OBSEA), located 4 km off of Vilanova i la Gertrú, Barcelona, is directly connected to a ground station by a telecommunication cable; thus, it is not affected by the limitations associated with previous observation technologies.
Journal ArticleDOI
Diel behavioral rhythms in sablefish (Anoplopoma fimbria) and other benthic species, as recorded by the Deep-sea cabled observatories in Barkley canyon (NEPTUNE-Canada)
TL;DR: In this article, the interplay between day-night and internal tidal cycles in regulating the behavior of sablefish (also referred to as black cod; Anoplopoma fimbria ), hagfish ( Eptatretus spp.) and crabs was examined.
Journal ArticleDOI
Coastal observatories for monitoring of fish behaviour and their responses to environmental changes
Jacopo Aguzzi,C. Doya,Samuele Tecchio,F.C. De Leo,Ernesto Azzurro,Corrado Costa,Valerio Sbragaglia,J. del Rio,Joan Navarro,Henry A. Ruhl,Paolo Favali,Autun Purser,Laurenz Thomsen,Ignacio Alberto Catalán +13 more
TL;DR: Two key approaches for the future improvement of cabled observatory technology are: the application of Artificial Intelligence to aid in the analysis of increasingly large, complex, and highly interrelated biological and environmental data sets, and the development of geographical observational networks to enable the reliable spatial analysis of observed populations over extended distances.
Journal ArticleDOI
High-frequency study of epibenthic megafaunal community dynamics in Barkley Canyon: A multi-disciplinary approach using the NEPTUNE Canada network
Marjolaine Matabos,Alice O.V. Bui,Steven Mihaly,Jacopo Aguzzi,S. Kim Juniper,R. S. Ajayamohan +5 more
TL;DR: In this paper, the epibenthic megafaunal community at 890 m depth in Barkley Canyon off Vancouver Island (BC, Canada) using the NEPTUNE Canada cabled network was examined for species composition and behavior.
Journal ArticleDOI
Feeding ecology and trophic position of three sympatric demersal chondrichthyans in the northwestern Mediterranean
TL;DR: The results illustrate the utility of using complementary approaches that provide information about the feeding behaviour at short (stomach content) and long-term scales (stable isotopes) which could allow more efficient monitoring of marine food-web changes in the study area.
References
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Book
Light and photosynthesis in aquatic ecosystems
TL;DR: The Underwater Light Field: Concepts of hydrologic optics, Absorption of light within the aquatic medium, and photosynthesis as a function of the incident light.
Book
Deep-Sea Biology: A Natural History of Organisms at the Deep-Sea Floor
John D. Gage,Paul A. Tyler +1 more
TL;DR: In this paper, the development of deep-sea biology, the physical environment, and methods of study are discussed, as well as the effects of man's effects on the deep sea.
Journal ArticleDOI
Vertical migration in zooplankton as a predator avoidance mechanism1
TL;DR: In this paper, the authors investigated the role of predation in the adaptive significance of vertical migration among zooplankton in both Gatun Lake in Panama and Fuller Pond in Connecticut.
Journal ArticleDOI
Environmental influences on regional deep-sea species diversity
Lisa A. Levin,Ron J. Etter,Michael A. Rex,Andrew J. Gooday,Craig R. Smith,Jesús Pineda,Carol T. Stuart,Robert R. Hessler,David L. Pawson +8 more
TL;DR: A conceptual model of how interdependent environmental factors shape regional-scale variation in local diversity in the deep sea is presented, showing how environmental gradients may form geographic patterns of diversity by influencing local processes such as predation, resource partitioning, competitive exclusion, and facilitation that determine species coexistence.
Book
Chronobiology: Biological Timekeeping
TL;DR: This chapter discusses the evolution of Biological Timing from Unicells to Humans, and the Relevance of Circadian Rhythms for Human Welfare.
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