A5009372175- Marine animal studies overview
- Marine and fisheries research
- Arctic and Antarctic ice dynamics
- Underwater Acoustics Research
- Wildlife Ecology and Conservation
- Animal Vocal Communication and Behavior
- Ichthyology and Marine Biology
- Fish Biology and Ecology Studies
- Species Distribution and Climate Change
- Coral and Marine Ecosystems Studies
- Plant Pathogens and Fungal Diseases
- Ecology and biodiversity studies
- Plant and animal studies
- Maritime Navigation and Safety
- Animal Ecology and Behavior Studies
- Cephalopods and Marine Biology
- Marine Ecology and Invasive Species
- Plant and Fungal Species Descriptions
- Fish Ecology and Management Studies
- Marine and coastal plant biology
University of Hawaii System
2025
University of Hawaiʻi at Mānoa
2021-2025
Yellowstone Ecological Research Center
2024
Yellowstone National Park
2024
University of St Andrews
2012-2024
International Fund for Animal Welfare
2005-2010
The Mediterranean sub-population of sperm whales is believed to be isolated and classified as Endangered on the IUCN Red List. Although there evidence suggest population declining, a lack abundance data. A series acoustic line-transect surveys were undertaken between 2004 2013. In 2004, 3,946km effort was conducted in southern Western basin, resulting detection 159 whales. While 2007 2013, 10,276km Eastern 24 pooled function gave an effective strip half-width 9.8km. correction for...
Boat-based acoustic and visual surveys for harbour porpoises (Phocoena phocoena) were conducted during the summers of 2001 2002 in order to investigate their distribution relative abundance Baltic Sea, compare results with adjacent Kiel Mecklenburg Bights Little Belt. Harbour are subject year-round bycatch gillnets other fishing gear these waters. This is particular concern Sea where a survey carried out 1995 indicated that population low current levels anthropogenic mortality believed be...
Acoustic surveys for sperm whales, using line-transect methodology, were carried out in the Ionian Sea and Straits of Sicily, Mediterranean Sea, 2003. A total 17 whales detected along 3846 km designed survey track no 892 Sicily. This was insufficient to estimate a detection function, so further data obtained from quasi-random passages made elsewhere western same year. The encounters included several tight aggregations with inter-animal spacing less than 1 km, primarily Mediterranean....
Following the cessation of whaling, South Atlantic populations humpback Megaptera novaeangliae and some other baleen whale species are recovering, but there has been limited monitoring their recovery in Scotia Arc, a former whaling epicentre hotspot for Antarctic krill Euphausia superba . To inform management fisheries, up-to-date assessment biomass prey consumption is essential. Using model-based approach, we provide first estimates abundance Georgia Sandwich Islands total whales across...
A series of visual–acoustic surveys were carried out in the Mediterranean Sea between 2003 and 2007 from RV ‘Song Whale’. Almost 21,000 km trackline surveyed longitudes 14°W 36°E with an emphasis on regions low survey effort. Survey tracklines designed to provide even coverage probability random start points. Ten cetacean species positively identified (sperm whale, fin Cuvier's beaked false killer long-finned pilot Risso's dolphin, common bottlenose rough-toothed striped dolphin short-beaked...
Following the cessation of whaling, southwest Atlantic humpback whale (Megaptera novaeangliae) population is thought to be close pre-exploitation size, reversing 20th century changes in abundance. Using a model-based approach applied concurrently collected data on baleen abundance and Antarctic krill (Euphausia superba) biomass South Sandwich Islands (SSI) region, we explore ecological interactions between these taxa. Krill density were highest north northeast SSI, where Circumpolar Current...
Several legal acts mandate that management agencies regularly assess biological populations. For species with distinct markings, these assessments can be conducted noninvasively via capture-recapture and photographic identification (photo-ID), which involves processing considerable quantities of data. To ease this burden, increasingly rely on automated (ID) algorithms. Identification algorithms present an opportunity-reducing the cost population assessments-and a challenge-propagating...
current concerns about the population levels of basking shark ( cetorhinus maximus ) in north-east atlantic have prompted a need to understand distribution, habitat preference and centres abundance. this study, spatial distribution maps derived from satellite-tag geolocations, boat surveys public sightings data were compared. broad patterns revealed by these different methods are similar, but there considerable differences density distributions. surface show high densities, or ‘hotspots’...
Abstract Killer whales ( Orcinus orca ) have group‐specific call repertoires that can be used to track groups and populations using passive acoustic monitoring. To provide a detailed description of the Icelandic killer whale repertoire its variation, we analyzed data collected in five locations between 1985 2016. Calls were classified manually, CART random forest analyses employed validate manual classification. A total 91 categories (including types subtypes) defined. Most recorded more...
ABSTRACT A method is described and tested for identifying prioritizing actions to facilitate recovery (restoration) and/or conservation (maintenance) of populations threatened marine species. The exercise was based on established approaches terrestrial species assessing each according ‘degree threat’ ‘recovery/conservation potential’. Assessment both degree threat recovery/conservation potential informed by researching the relevant life‐history traits existing knowledge natural fluctuations...
An abstract is not available for this content. As you have access to content, full HTML content provided on page. A PDF of also in through the 'Save PDF' action button.
The distribution of harbour porpoises Phocoena phocoena in southern Europe and along the Atlantic African coast is poorly understood, with tentative assessments suggesting a discrete West population northern limit around Straits Gibraltar. This study describes visual acoustic surveys for waters North-West Africa spring 2005 between latitudes 20°N 37°N. During this period, 276h data were collected all sea states (from 3 125km trackline) 60h (824km) effort was conducted Beaufort three or less....
Photo-grammetric techniques developed for measuring body length and small scale movement patterns of cetaceans were applied to surface swimming basking sharks off the west coast Scotland. These methods removed need close approaches, reducing likelihood disturbing focal animal. Average speed was calculated from total path between shark locations measured at approximately one minute intervals. average speeds varied 0.49 0.73 ms −1 tracks 30 170 minutes' duration. Body measurements ranged 2.35...
Mesocarnivores must balance the negative (competition) and positive (carrion provisioning) effects of dominant apex carnivores to coexist in shared landscapes. How mesocarnivores navigate such top-down have typically been examined through a risk-reward lens. However, risks accrued by might not be even across all apex-mesocarnivore pairings multi-carnivore systems, instead can mediated species-specific interactions. Using remote-camera surveys from 2021-2023, we estimated (wolf, cougar)...