Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Photo-identification"”.
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Designing Human-AI Collaborative Systems for Historical Photo Identification
Identifying individuals in historical photographs is important for preserving material culture, correcting historical records, and adding economic value. Historians, antiques dealers, and collectors often rely on manual, time-consuming approaches. While Artificial Intelligence (AI) offers potential …
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Photo-identification of humpback whales (Megaptera novaeangliae) between Iceland, Norway and Guadeloupe
… ground of the eastern West Indies. Through photo-identification methods between Icelandic and Norwegian catalogues, four (n=4) humpback whales have been sighted in both feeding grounds, while matches with Guadeloupe display a higher contribution of Norwegian (2.51%) than Icelandic whales …
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Social behavior of the Cuvier’s beaked whale (Ziphius cavirostris) investigated by telemetry and photo-identification
… Hatteras, North Carolina, USA. I used data from photo identification surveys from a longitudinal study, as well as satellite-linked depth-recording telemetry tags to investigate within and between group behavior. In addition, I present a case study and assessment of how I optimized the …
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Photo-identification of White-Beaked Dolphins and their relations with Atlantic Cod and sea surface temperature fluctuations in Skjálfandi Bay, Iceland
… was collected during whale-watching tours, using photo identification and the frequency estimations were calculated using the Sighting Per Unit Effort (SPUE) index, which was analysed for potential correlation with cod landings data, collected from the national fishery database, and the mean …
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Demographics of a seasonal aggregation of white sharks at Seal Island, False Bay, South Africa
… populations need to be effectively monitored. Photo-identification provides a standardised, non-lethal method of assessing the population dynamics of extant species and provides live-encounter mark-recapture and data that are essential for management and conversation. White sharks occur …
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Investigating the potential for individually distinctive signature whistles to be used in mark-recapture of common bottlenose dolphins (Tursiops truncatus)
… dolphins, Tursiops truncatus. Acoustic and photo identification data were collected simultaneously from a small population of common bottlenose dolphins in Walvis Bay, Namibia, between 2009 and 2015. Visual classification and bout analysis was used to identify signature whistle types. Photos …
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Characterization of Association Patterns of Coastal Migratory Bottlenose Dolphins, <i>Tursiops truncatus</i>, in the Nearshore Waters of Virginia Beach, Virginia
… social systems. For this study, I analyzed photo-identification data from 1994 to 1999 to describe association patterns of bottlenose dolphins in the nearshore waters of Virginia Beach, Virginia. Bottlenose dolphins are present seasonally (late April until early November) in these waters and …
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The Ecology of Large Marine Predators in the Hauraki Gulf
… were conducted during the same period to collect photo-identification data to estimate Bryde’s whale abundance with mark-recapture (MR) methods. Bryde’s whale abundance was estimated with a custom-made MR model to minimise bias associated with heterogeneity in capture probabilities resulting from …
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Biology & ecology of a killer whale (Orcinus orca) community that interacts with pelagic trawlers in the Northeast Atlantic
… for obtaining killer whale behavioural and photo-identification data, skin biopsies, fish and seawater (eDNA) samples. Data collection was carried out in four separate fishing seasons between 2016 and 2018. In the first scientific chapter (chapter 2), killer whale interactions with the …
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Socio-Technical Perspectives on Digital Photography: Scientific Digital Photography Use by Marine Mammal Researchers
… for marine mammal scientists who use digital photography. Scientists studying marine mammals use a technique called photo-identification to identify individual animals such as whales and dolphins in the wild. This technique involves photographing the animals, and later matching these images to …
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E pluribus unum: what individual whales can tell us about enigmatic species distribution and social organization
… imagined. This study demonstrates use of photo-identification data to model both social structure and habitat selection, minimizing the need for invasive research and greatly increasing the sample size used in such endeavors. A conditional logistic model is written for a 20-year sightings …
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Recreational Diving and Hawksbill Sea Turtles (Eretmochelys imbricata) in a Marine Protected Area
… of long-term sea turtle sightings and photo-identification surveys in the RMP, and suggested additional studies for other MPAs and researchers. Specifically I recommended that additional studies be conducted to compare recreational diver impacts on hawksbill sea turtle behavior within …
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Maintaining contact : design and use of acoustic signals in killer whales, Orcinus orca
… killer whales have been the focus of a long-term photo-identification effort. Extensive previous research on this population has demonstrated stable kin-based matrilineal social groups and pod-specific calling behavior. Individually-distinctive markings and pigmentation patterns were used to …
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Behavioural ecology of Irrawaddy, Orcaella brevirostris (Owen in Gray, 1866), and Indo-Pacific humpback dolphins, Sousa chinensis (Osbeck, 1765), in northeast Queensland, Australia : a comparative study
… of Irrawaddy and humpback dolphins. I photo-identified 63 Irrawaddy dolphins and 54 humpback dolphins in Cleveland Bay. Analysis of monthly and annual sighting rates of identified animals indicated most individuals were not permanent residents in the bay, but most used the area from …
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The history, ecology, and reintroduction of the chequered skipper butterfly Carterocephalus palaemon in England
… was assessed.<br/><br/>A novel, non-invasive photographic-mark-recapture (PMR) population sampling technique was developed using the unique wing markings of C. palaemon to detect the movements and lifespan of individual butterflies photographed during timed counts at Fineshade Wood. Population …