Observing the nature of relationships in male bottlenose dolphins

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SUMMARY

    A common way to determine the strength of relationships between individuals is to calculate an association index, such as the half-weight index of association (HWI) or Simple Ratio Index (SRI) in which 10-20 sightings per individual are used to determine how often two individuals are seen together in a group compared to seen without each other (e_g, Wells et_al 1987; Quintana-Rizzo and Wells 2001). Moderately stable top partners for three consecutive years include Calvin as Khyber`s partner, Calvin as Malabar`s partner, and Ranier as Malabar`s partner, but these . . .

     

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