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This is an accepted version of this page This is the latest accepted revision, reviewed on 27 February 2025. Large baleen whale species Humpback whale Temporal range: 7.2–0 Ma Preκ κ O S D C P T J K Pg N Late Miocene – Recent Size compared to an average human Conservation status Least Concern (IUCN 3.1) CITES Appendix I (CITES) Scientific classification Domain: Eukaryota Kingdom ...
The human brain. Differences in male and female brain size are relative to body size. [83] Early research into the differences between male and female brains showed that male brains are, on average, larger than female brains. This research was frequently cited to support the assertion that women are less intelligent than men.
Sexual dimorphism is also displayed through whale song, notably in humpback whales where the males of the species sing elaborate songs. Male right whales have bigger callosities than female right whales. The males are generally more scarred than females which is thought to be because of aggression during mating season. [60]
Photographers have captured two male humpback whales having sex, in what experts say is the first time the species has been documented exhibiting sexual activity of any kind.
One difference between the glans penis and the glans clitoridis is that the glans clitoridis packs nerve endings into a volume only about one-tenth the size of the glans penis. Therefore, the glans clitoridis has greater variability in cutaneous corpuscular receptor density (1-14 per 100× high-powered field) compared with the glans penis (1-3 ...
Two use homomorphic male heterogamety, one uses XX/XY, one uses ZZ/ZW. Remarkably, the X and Z chromosomes are homologous, and the Y and W as well. Dmrt1 is on autosome 1 and not sex-linked. This means that an XX female individual is genetically similar to a ZZ male individual, and an XY male individual is to a ZW female individual.
A male humpback whale has made an extraordinary journey from South America to Africa — traveling more than 13,046 kilometers (8,106 miles) — the longest migration recorded for a single whale ...
Migaloo migrates along the eastern part of Australia at a migration rate of between 125 [20] and 140 [21] kilometres per day, with a mean speed of 5.2 km/h (3.2 mph), faster than the mean speed recorded for other humpback whales, likely because he is an adult male and endures faster travelling speeds than juveniles and females with calves, for ...