Articles by Keyword: Photo Identification

Search results for Photo Identification

We found 48 results for you
  1. Natural markings of Cuvier's beaked whale <em>Ziphius cavirostris</em> in the Mediterranean Sea

    Natural markings of Cuvier's beaked whale <em>Ziphius cavirostris</em> in the Mediterranean Sea

    Item type: Journal Article • Journal: African Journal of Marine Science
    Errors in analysis using natural marks have been recognised since the early development of mark-recapture techniques. In this nine-year study, the mark types present on Cuvier's beaked whales Ziphius cavirostris in the Mediterranean Sea were categorised in order to assess...
  2. Observations of individual humpback whales utilising multiple migratory destinations in the south-western Indian Ocean

    Observations of individual humpback whales utilising multiple migratory destinations in the south-western Indian Ocean

    Item type: Journal Article • Journal: African Journal of Marine Science
    Movements of humpback whales Megaptera novaeangliae among breeding regions within the southwestern Indian Ocean are poorly understood. Understanding the relationships among breeding regions is critical for effective conservation and management strategies. Through systematic comparisons of molecular genotypes and both systematic...
  3. Transit station or destination? Attendance patterns, movements and abundance estimate of humpback whales off west South Africa from photographic and genotypic matching

    Transit station or destination? Attendance patterns, movements and abundance estimate of humpback whales off west South Africa from photographic and genotypic matching

    Item type: Journal Article • Journal: African Journal of Marine Science
    Humpback whales Megaptera novaeangliae found off west South Africa (WSA) are known to display an atypical migration that may include temporary residency and feeding during spring and summer. At a regional scale there is uncertainty about how these whales relate...
  4. Bottlenose dolphin <em>Tursiops truncatus</em> at São Tomé Island (São Tomé and Príncipe) — relative abundance, site fidelity and social structure

    Bottlenose dolphin <em>Tursiops truncatus</em> at São Tomé Island (São Tomé and Príncipe) — relative abundance, site fidelity and social structure

    Item type: Journal Article • Journal: African Journal of Marine Science
    Although the bottlenose dolphin Tursiops truncatus is one of the most common cetacean species around São Tomé Island, Gulf of Guinea, little research has focused on this species in this region. This study investigated the population of bottlenose dolphins around...
  5. Inter-island movements of common bottlenose dolphins <em>Tursiops truncatus</em> among the Canary Islands: online catalogues and implications for conservation and management

    Inter-island movements of common bottlenose dolphins <em>Tursiops truncatus</em> among the Canary Islands: online catalogues and implications for conservation and management

    Item type: Journal Article • Journal: African Journal of Marine Science
    A total of 313 individual common bottlenose dolphins Tursiops truncatus was photo-identified in four Special Areas of Conservation (SACs) in the western Canary Islands, Spain (El Hierro, La Palma, La Gomera and Tenerife), over a 10-year period (2001–2011). Of these,...
  6. Distribution, behaviour and photo-identification of Atlantic humpback dolphins <em>Sousa teuszii</em> off Flamingos, Angola

    Distribution, behaviour and photo-identification of Atlantic humpback dolphins <em>Sousa teuszii</em> off Flamingos, Angola

    Item type: Journal Article • Journal: African Journal of Marine Science
    Atlantic humpback dolphins Sousa teuszii are a priority for research due to their restricted geographic range, narrow ecological niche and the paucity of existing information. The distribution and behaviour of S. teuszii off Flamingos, southern Angola, was investigated during summer...
  7. Abundance of the Indo-Pacific bottlenose dolphin <em>Tursiops aduncus</em> off south-west Mauritius

    Abundance of the Indo-Pacific bottlenose dolphin <em>Tursiops aduncus</em> off south-west Mauritius

    Item type: Journal Article • Journal: African Journal of Marine Science
    The abundance of Indo-Pacific bottlenose dolphins Tursiops aduncus off the south-west coast of Mauritius was estimated using capture-mark-recapture modelling. Over the past two decades this population has been subjected to ongoing anthropogenic disturbance in the form of extensive coastal development...
  8. Spinner dolphins <em>Stenella longirostris</em> off south-west Mauritius: abundance and residency

    Spinner dolphins <em>Stenella longirostris</em> off south-west Mauritius: abundance and residency

    Item type: Journal Article • Journal: African Journal of Marine Science
    Spinner dolphins Stenella longirostris longirostris off the south-west coast of Mauritius are subject to ongoing anthropogenic disturbance in the form of daily dolphin tourism, which has intensified since 1998. Abundance of this species was estimated using photo-identification data and mark-recapture...
  9. A computer-aided framework for subsurface identification of white shark pigment patterns

    A computer-aided framework for subsurface identification of white shark pigment patterns

    Item type: Journal Article • Journal: African Journal of Marine Science
    Subsurface video footage can be used as a successful identification tool for various marine organisms; however, processing of such information has proven challenging. This study tests the use of automated software to assist with photo-identification of the great white shark...
  10. Abundance and degree of residency of humpback dolphins <em>Sousa plumbea</em> in Mossel Bay, South Africa

    Abundance and degree of residency of humpback dolphins <em>Sousa plumbea</em> in Mossel Bay, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Indian Ocean humpback dolphins Sousa plumbea inhabit nearshore waters from South Africa to eastern India. Humpback dolphins are vulnerable to conservation threats due to their naturally small population sizes and use of nearshore habitats, where human activities are highest. We...