A5102918529- Marine animal studies overview
- Isotope Analysis in Ecology
- Cephalopods and Marine Biology
- Marine and fisheries research
- Arctic and Antarctic ice dynamics
- Species Distribution and Climate Change
- Fish Ecology and Management Studies
- Arctic and Russian Policy Studies
- Avian ecology and behavior
- Marine Invertebrate Physiology and Ecology
- Marine and coastal ecosystems
- Fish Biology and Ecology Studies
- Ichthyology and Marine Biology
- Mercury impact and mitigation studies
- Marine Biology and Ecology Research
National Institute of Water and Atmospheric Research
2012-2022
Migration Institute of Australia
2022
STMicroelectronics (France)
2022
Imperial College London
2011
Abstract Aim Cetaceans are inherently difficult to study due their elusive, pelagic and often highly migratory nature. New Zealand waters home 50% of the world's cetacean species, but spatial distributions poorly known. Here, we model 30 taxa using an extensive at‐sea sightings dataset ( n > 14,000) high‐resolution (1 km 2 ) environmental data layers. Location Zealand's Exclusive Economic Zone (EEZ). Methods Two models were used predict probability species occurrence based on available...
The diets of Antarctic toothfish Dissostichus mawsoni and Patagonian eleginoides were examined around the South Sandwich Islands in Southern Ocean, one few regions with overlapping populations two species. Despite large differences proportion stomachs containing prey (76·2% D. compared to 7·2% eleginoides), diet composition was broadly similar (Schoener overlap index 74·4% based on mass) finfishes (particularly macrourids muraenolepidids) cephalopods (mainly Kondakovia longimana) comprising...
New Zealand (NZ) is an island nation with stewardship of ocean twenty times larger than its land area. While the challenges facing NZ's are similar to other maritime countries, no coherent national plan exists that meets needs scientists, stakeholders or kaitiakitanga (guardianship) in a changing climate. The NZ marine science community will use OceanObs'19 white paper establish framework and implementation for collaborative observing system (NZ-OOS). Co-production knowledge Māori be...
Abstract Xavier, J. C., Cherel, Y., Roberts, J., and Piatkowski, U. 2013. How do cephalopods become available to seabirds: can fish gut contents from tuna fishing vessels be a major food source of deep-dwelling cephalopods? – ICES Journal Marine Science, 70:46–49. Cephalopods are important prey for numerous seabird species. However, the physical mechanisms by which (particularly species considered as deep-dwelling) seabirds poorly understood, it has recently been suggested that discarded...
The South Sandwich Islands (SSI) are a volcanic archipelago in the Atlantic sector of Southern Ocean; they biologically rich area, home to range benthic habitats such as hydrothermal vents and seamounts. A commercial longline fishery for two congeneric species deep-sea fish, Patagonian (Dissostichus eleginoides) Antarctic (D. mawsoni) toothfish has been operation annually at SSI since 2005 throughout its history employed scientific observers collect detailed information on caught during...
Abstract Mid‐trophic level (MTL) organisms play a key role in the sub‐Antarctic ecosystem food web, linking primary producers and tertiary consumers transferring energy across trophic levels. In this region, relative abundance of MTLs has been monitored using single‐frequency acoustic data collected opportunistically time series trawl surveys carried out austral late spring/early summer. To advance approach, we developed methodology that enabled us to disaggregate multifrequency into three...