Seasonal variations in life span of the ascidian, Ciona intestinalis.
D000375:Aging; D000818:Animals; D002816:Chordata, Nonvertebrate / Q000502:physiology*; D005260:Female; D008297:Male; D009026:Mortality; D011247:Pregnancy; D012621:Seasons; D013696:Temperature; D013997:Time Factors