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Blue Whale: 11 – 12 months (females breed every 2 – 3 years). Killer whale : 15 – 18 months (average is about 17 months). Females give birth every 3 – 5 years.
28 maj 2022 · Female blue whales reach sexual maturity as young as five years old, or as late as 15 years old. Blue whales can expect to live up to 80 or 90 years. That means that, in her lifetime, a single blue whale mother may give birth to up to 40 calves!
The age at which young cetaceans can in turn reproduce varies from one species to the next. For blue whales, sexual maturity for both males and females is reached after about 5 years. Male sperm whales on the other hand must wait over 20 years before taking a shot at procreating.
Reproduction and birth. A blue whale calf with its mother. Blue whales generally reach sexual maturity at 8–10 years. In the Northern Hemisphere, the length at which they reach maturity is 21–23 meters (69–75 ft) for females and 20–21 meters (66–69 ft) for males.
29 wrz 2022 · The largest whales on the planet, the blue whale, give birth to calves that are around 23 feet long. As soon as they are born, they are larger than nearly every animal on earth. The smallest species of whale, the dwarf sperm whale, is usually 9 feet long when it’s an adult, with their babies usually measuring 4 feet long and weighing 400-600 lbs.
19 wrz 2020 · We assessed blue whale ( Balaenoptera musculus) sex ratios based on 21,542 fetal and 311,901 whaling records, finding that males were slightly but significantly more common than females (51.3% fetal, 52.1% postnatal).
28 lut 2013 · The external anatomy of a 130-mm blue whale fetus (Balaenoptera musculus) is described, and its internal anatomy is reconstructed noninvasively from microCT scans. The specimen lies developmentally at the junction of the embryonic and fetal periods.
