Seasonal and spatial variability in the vertical distribution of pelagic forage fauna in the Southwest Pacific

Receveur, Aurore; Menkès, Christophe E.; Allain, Valérie; Lebourges‐Dhaussy, Anne; Nérini, David; Mangeas, Morgan; Ménard, Frédéric

doi:10.1016/j.dsr2.2019.104655

Cited by 14 publications

(9 citation statements)

References 92 publications

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“…The acoustic snapshots revealing spatio-temporal sound scattering patterns, deep scattering layer, and diel vertical migration (Fig. 2 ) can offer improved ecological insights 34 , 35 for marine ecosystem acoustics 36 – 38 , in addition to established linkages with oceanographic processes 39 – 48 and environmental covariates 49 – 51 including light 52 – 54 , oxygen concentration 55 – 57 , temperature 58 , 59 , chlorophyll a 60 , and primary production 6 , 59 .…”

Section: Background and Summarymentioning

confidence: 99%

Sounding out life in the deep using acoustic data from ships of opportunity

et al. 2021

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Shedding light on the distribution and ecosystem function of mesopelagic communities in the twilight zone (~200–1000 m depth) of global oceans can bridge the gap in estimates of species biomass, trophic linkages, and carbon sequestration role. Ocean basin-scale bioacoustic data from ships of opportunity programs are increasingly improving this situation by providing spatio-temporal calibrated acoustic snapshots of mesopelagic communities that can mutually complement established global ecosystem, carbon, and biogeochemical models. This data descriptor provides an overview of such bioacoustic data from Australia’s Integrated Marine Observing System (IMOS) Ships of Opportunity (SOOP) Bioacoustics sub-Facility. Until 30 September 2020, more than 600,000 km of data from 22 platforms were processed and made available to a publicly accessible Australian Ocean Data Network (AODN) Portal. Approximately 67% of total data holdings were collected by 13 commercial fishing vessels, fostering collaborations between researchers and ocean industry. IMOS Bioacoustics sub-Facility offers the prospect of acquiring new data, improved insights, and delving into new research challenges for investigating status and trend of mesopelagic ecosystems.

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Section: Background and Summarymentioning

confidence: 99%

Sounding out life in the deep using acoustic data from ships of opportunity

et al. 2021

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“…We used the Bayesian information criteria (BIC) (Raftery, 1995;Hui et al, 2015) and our personal knowledge of the region based on acoustics data analyses (Receveur et al, 2019(Receveur et al, , 2020 to choose the appropriate number of RCPs.…”

Section: Model Parameterizationmentioning

confidence: 99%

“…The selection of the number of assemblages to describe was based on BIC values that increased quickly between three and seven assemblages (or RCPs) and then decreased up to 10 assemblages with similar BIC values for nine and 10 RCPs (Supplementary Figure S4). Based on that BIC information and on a previous study (Receveur et al, 2019), the three-assemblage solution was first analyzed, which kept the analysis simple, and then the nine-assemblage solution was explored, which provided more detailed and nuanced information.…”

Section: Haul Data Setmentioning

confidence: 99%

“…Two previous studies analyzed the acoustic data from the same Nectalis surveys to link the mean 20-120 m acoustic echo-intensity and the 0-600 m vertical acoustic profiles to environmental conditions (Receveur et al, 2019(Receveur et al, , 2020. They proposed a bioregionalization of the New Caledonia EEZ based on the micronekton vertical distribution and identified three homogenous regions during the day: (i) north of 21 • S with a weak deep scattering layer (DSL) and a weak shallow scattering layer (SSL); (ii) south of 21 • S and west of 165 • E (intense SSL at 80 m and very intense SSL at 30 m); and (iii) south of 21 • S and east of 165 • E (intense SSL and very intense DSL at 550 m).…”

Section: Link To Acousticsmentioning

confidence: 99%

“…This vertical migration largely participates in the downward flux of nutrients and particulate organic matter via respiration and excretion processes (Hidaka et al, 2001;Ariza et al, 2015;Drazen and Sutton, 2017). This diel vertical migration pattern (DVM) is observed in the world's oceans (Bianchi and Mislan, 2016;Klevjer et al, 2016) and is performed by a large majority of species (75% of organisms in the southwest Pacific according to Receveur et al, 2019). Despite their important role, the dynamic of micronektonic species in their environment is still poorly understood (St. John et al, 2016;Hidalgo and Browman, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Biogeography of Micronekton Assemblages in the Natural Park of the Coral Sea

et al. 2020

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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 statistical multivariate method allowing the study of both species assemblages and environmental conditions' influence on species occurrence probability. Nine major assemblages were identified, mainly driven by time of the day and sampling depth. Environmental variables, such as mean oxygen concentration, mean temperature, and bathymetry, also influenced micronekton assemblages, inducing a north/south distribution pattern. Three major day-assemblages were identified, distributed over the whole EEZ but segregated by depth: one assemblage in waters shallower than 200 m and the other two in deeper waters, respectively, in the north and the south. The night-assemblages were mostly segregated by depth with two community changes at approximately 80 and 200 m and spatially with a north-south gradient. The predominant northern night assemblages were dominated by crustacean, whereas the southern assemblage mostly by cephalopods and fish species. Generally, the southwest part of the EEZ was the most diverse part. Statistical analyses allowed the prediction of the spatial distribution of each species, and its vertical migration behavior was determined. Based on results, three important areas were identified to be considered for special management measures as part of the Natural Park of the Coral Sea.

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Modelling Marine Predator Habitat Using the Abundance of Its Pelagic Prey in the Tropical South-Western Pacific

et al. 2021

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Understanding the ecological mechanisms underpinning distribution patterns is vital in managing populations of mobile marine species. This study is a first step towards an integrated description of the habitats and spatial distributions of marine predators in the Natural Park of the Coral Sea, one of the world’s largest marine-protected areas at about 1.3 million km2, covering the entirety of New Caledonia’s pelagic waters. The study aims to quantify the benefit of including a proxy for prey abundance in predator niche modelling, relative to other marine physical variables. Spatial distributions and relationships with environmental data were analysed using catch per unit of effort data for three fish species (albacore tuna, yellowfin tuna and dolphinfish), sightings collected from aerial surveys for three cetacean guilds (Delphininae, Globicephalinae and Ziphiidae) and foraging locations identified from bio-tracking for three seabird species (wedge-tailed shearwater, Tahiti petrel and red-footed booby). Predator distributions were modelled as a function of a static covariate (bathymetry), oceanographic covariates (sea surface temperature, chlorophyll-a concentration and 20 °C-isotherm depth) and an acoustically derived micronekton preyscape covariate. While distributions were mostly linked to bathymetry for seabirds, and chlorophyll and temperature for fish and cetaceans, acoustically derived prey abundance proxies slightly improved distribution models for all fishes and seabirds except the Tahiti petrel, but not for the cetaceans. Predicted spatial distributions showed that pelagic habitats occupied by predator fishes did not spatially overlap. Finally, predicted habitats and the use of the preyscapes in predator habitat modelling were discussed.

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Seasonal and spatial variability in the vertical distribution of pelagic forage fauna in the Southwest Pacific

Cited by 14 publications

References 92 publications

Sounding out life in the deep using acoustic data from ships of opportunity

Sounding out life in the deep using acoustic data from ships of opportunity

Biogeography of Micronekton Assemblages in the Natural Park of the Coral Sea

Modelling Marine Predator Habitat Using the Abundance of Its Pelagic Prey in the Tropical South-Western Pacific

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