The Photographic Determination of Group Size, Composition, and Stability of Coastal Porpoises (Tursiops truncatus)

By Bernd Würsig, Melany Würsig. 1977

Subfields: Computer Vision and Pattern Recognition

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Citations in the corpus

NDD20: A large-scale few-shot dolphin dataset for coarse and fine-grained categorisation (2020, background): “This may seem like an almost impossible task, however it has been achieved by cetacean researchers for over forty years (21), manually identifying individuals based on prominent markings on their ﬁns as they breach the waterline.”
Dolphins in a bottle: abundance, residency patterns and conservation of bottlenose dolphins Tursiops truncatus in the semi-closed eutrophic Amvrakikos Gulf, Greece (2008, background): “During 106 days it was possible to obtain colour photographs suitable for individual identification, based on long-term natural marks on the dolphins’ dorsal fins (Würsig and Würsig, 1977).”
Individual Common Dolphin Identification Via Metric Embedding Learning (2018, background): “Individuals are identified by natural features that can be observed on the fins—these features vary between species, but typically include the pattern of nicks and notches on the trailing edge of the fin, the scratches/rake marks/scars on the fin and (for some species) the pigmentation patterns [1].”
Home range size of adult Indo-Pacific bottlenose dolphins (Tursiops aduncus) in a coastal and estuarine system is habitat and sex-specific (2016, methodology): “Images of each dorsal fin were used to identify dolphins by unique nicks and notches (W€ursig and W€ursig 1977).”
Overfishing and the disappearance of short-beaked common dolphins from western Greece (2008, background): “Colour photographs suitable for individual identification, based on long-term natural marks on the dolphins’ dorsal fins (Würsig & Würsig 1977, Neumann et al. 2002), were obtained on 356 d.”
Vessel noise effects on delphinid communication (2009, background): “The bottlenose dolphin Tursiops sp. is an example of a cetacean that lives in fission–fusion societies (Wursig & Wursig 1977, Connor et al. 2000, Connor et al. 2006), where acoustic cues play an important role in mediating social structure (Janik & Slater 1998, Watwood et al. 2005), predator…”
The social dynamics of southern resident killer whales and conservation implications for this endangered population (2009, background): “…the strength of intrapod associations suggest that rather than true fissioning, intermatrilineal divisions within L pod may occur on a temporary basis analogous to the fission–fusion structuring described for other delphinid populations (Wursig & Wursig 1977; Shane et al. 1986; Wells et al. 1987).”
Social cohesion in a hierarchically structured embayment population of Indo-Pacific bottlenose dolphins (2009, methodology): “Dolphins were photographed and individually recognized using natural markings on their dorsal fins (Würsig & Würsig 1977; Würsig & Jefferson 1990).”
POPULATION GENETIC STRUCTURE OF COASTAL BOTTLENOSE DOLPHINS (TURSIOPS TRUNCATUS) IN THE NORTHERN BAHAMAS (2006, background): “During each Abaco encounter, individual bottlenose dolphins were identified photographically by the unique pattern of long-lasting, naturally occurring nicks in their dorsal fins (Würsig and Würsig 1977, Scott et al. 1990).”
THE USE OF NATURAL MARKINGS IN STUDIES OF LONG‐FINNED PILOT WHALES (GLOBICEPHALA MELAS) (2007, background): “The notches of the pilot whales in this study, those examined from Newfoundland drive fisheries (Sergeant 1962b), and those of other cetaceans (Würsig and Würsig 1977; Bigg 1982), were mainly found on the trailing edge of the dorsal fin (Table 4).”
Can environmental heterogeneity explain individual foraging variation in wild bottlenose dolphins (Tursiops sp.)? (2007, unknown): “Individual dolphins were identified by natural dorsal fin shape and markings with the aid of a photographic catalogue (sensu Wursig and Wursig 1977 ).”
POPULATION SIZE, DISTRIBUTION, AND BEHAVIOR OF INDO‐PACIFIC BOTTLENOSE (TURSIOPS ADUNCUS) AND HUMPBACK (SOUSA CHINENSIS) DOLPHINS OFF THE SOUTH COAST OF ZANZIBAR (2006, background): “No groups were sampled more than once each day, however because both species live in nonstable groups (Würsig and Würsig 1977, Smolker et al. 1992, Karczmarski 1999, Jefferson 2000), some individuals could occur in more than one group in a single day.”
THE SOCIAL STRUCTURE OF BOTTLENOSE DOLPHINS, TURSIOPS TRUNCATUS, IN THE BAHAMAS (2004, methodology): “Other studies have shown dolphins with different patterns of disappearance for both residents and non-residents (Würsig and Würsig 1977, Wells et al. 1987, Wells 1991, Rossbach and Herzing 1999, Quintana-Rizzo and Wells 2001, Gubbins 2002b).”
Association patterns and kinship in female Indo-Pacific bottlenose dolphins (Tursiops aduncus) of southeastern Australia (2006, unknown): “Behavioral data and biopsy sampling The composition of 218 dolphin groups was determined by photographic identification of individuals (Würsig and Würsig 1977) during 38 boat surveys conducted between December 1998 and April 2000.”
Population structure of short‐finned pilot whales in the oceanic archipelago of Madeira based on photo‐identification and genetic analyses: implications for conservation (2013, methodology): “Photo-identification (photo-id), which is based on the repeated identification of individuals, has become an essential technique in providing information on group stability and association patterns in longitudinal studies (Würsig and Würsig, 1977; Würsig and Jefferson, 1990).”