Movements of Satellite-Tagged Pantropical Spotted Dolphins in Relation to Stock Boundaries in Hawaiian Waters
Abstract
The main Hawaiian Islands are home to resident populations of 11 different species ofodontocetes (Baird 2016). Up to three independent lines of evidence have been used to assessresidency patterns for these species over various time scales, the application of which has variedamong species: genetic studies (e.g., Martien et al. 2011, 2014); photo-identification (e.g., Bairdet al. 2008, 2009; Mahaffy et al. 2015); and satellite tagging (e.g., Baird et al. 2012). Forpantropical spotted dolphins (Stenella attenuata) in Hawaiian waters, early evidence of sitefidelity came from an individual tagged off Oahu in 1965 with a numbered roto tag (Norris1974). That individual was sighted in the same area three and a half years later, and several timessubsequently, leading Norris (1974) to note they appear to be resident to the area. Based on acombination of distribution patterns, morphological differences and genetics, pantropical spotteddolphins in Hawaii are distinct from stocks recognized in the eastern tropical Pacific (Dizon etal. 1994; Perrin et al. 1994; Courbis 2011; Carretta et al. 2018)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 19, 2019
- Accession Number
- AD1145469
Entities
People
- Daniel L. Webster
- Robin W Baird
Organizations
- Cascadia Research