Twenty years in the making by a distinguished dolphin expert and his associates, qThe Hawaiian Spinner Dolphinq is the first comprehensive scientific natural history of a dolphin species ever written. From their research camp at Kealakeakua Bay in Hawaii, these scientists followed a population of wild spinner dolphins by radiotracking their movements and, with the use of a windowed underwater vessel, observing the details of their underwater social life.The authors begin with a description of the spinner dolphin species, its morphology and systematics, and then examine the ocean environment, the organization of dolphin populations, and the way this school-based society of mammals uses shorelines for rest and instruction of the young. The dolphins' reproductive cycle, their vision, vocalization, hearing, breathing, and feeding, and the integration of the school are carefully analyzed. The authors conclude with a comprehensive evolutionary analysis of this marine cultural system, with its behavioral flexibility and high levels of cooperation.This absorbing book is the richest source available of new scientific insights about the lives of wild dophins and how their societies evolved at sea.ically born flukes first. ... (1977a) estimate 10.7 months as the gestation period for eastern tropical Pacific spinner dolphins, an average birth length of 77 cm, and an average length at attainment of sexual ... The Male Cycle The testicle weight to body weight ratio of cetaceans can sometimes become very high, amonganbsp;...
|Title||:||The Hawaiian Spinner Dolphin|
|Author||:||Kenneth S. Norris, Bernd Wursig, Randall S Wells, Melany Wursig|
|Publisher||:||Univ of California Press - 1994-08-30|