Ecology and Life History
Caught and stranded Hector’s dolphins have provided information on the life history and reproductive parameters of the species. The maximum observed age is 19 years for females and 20 years for males. However, a long term photo-ID project at Banks Peninsula has shown that individuals reach at least 23 years of age. Males attain sexual maturity between five and nine years of age, and females have their first calf between seven and nine years old. The calving interval is two to four years.
These life-history characteristics mean that Hector’s dolphins, like many other small cetaceans, have a low potential for population growth. Maximum population growth rate has been estimated to be 1.8-4.9% per year, although the lower end of this range is probably more realistic.
Read more about this topic: Hector's Dolphin
Famous quotes containing the words ecology, life and/or history:
“... the fundamental principles of ecology govern our lives wherever we live, and ... we must wake up to this fact or be lost.”
—Karin Sheldon (b. c. 1945)
“The businessman who assumes that his life is everything, and the mystic who asserts that it is nothing, fail, on this side and on that, to hit the truth.... No; truth, being alive ... was only to be found by continuous excursions into either realm, and though proportion is the final secret, to espouse it at the outset is to ensure sterility.”
—E.M. (Edward Morgan)
“The history of all Magazines shows plainly that those which have attained celebrity were indebted for it to articles similar in natureto Berenice—although, I grant you, far superior in style and execution. I say similar in nature. You ask me in what does this nature consist? In the ludicrous heightened into the grotesque: the fearful coloured into the horrible: the witty exaggerated into the burlesque: the singular wrought out into the strange and mystical.”
—Edgar Allan Poe (1809–1849)