what is the life Span of blue whales
Answers
Explanation:
life span of blue whales is 80-90 years
Answer:
Life span
The most reliable age estimations are from ear plugs. Blue whales secrete earwax (cerumen) throughout their lives forming long, multilayered plugs. Each chronologically deposited light and dark layer (lamina) indicate a switch between fasting during migration and feeding, and one set is laid down per year, and thus the number of these layers can be used as an indicator of age.[25][26][27] The maximum age determined from earplug laminae for a pygmy whale is 73 years (n=1133).[28] Prior to the development of ear plugs as an ageing method, layers in baleen plates were used, but these wear down and are not a reliable measure. In addition, the ovaries of female blue whales form a permanent record of the number of ovulations (or perhaps pregnancies), in the form of corpora albicantia. These fibrous masses are permanent scars that have been used in the past as an indication of age.[29] In pygmy blue whales, one corpus albicans is formed every 2.6 years on average,[28] which matches the two- to three-year interval between calves.
Explanation: