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It was a way for whalers to pass the time between hunts. The sperm whale's ivory-like teeth were often sought by 18th- and 19th-century whalers, who used them to produce inked carvings known as scrimshaw. 30 teeth of the sperm whale can be used for ivory. Each of these teeth, up to 20 cm (8 in) and 8 cm (3 in) across, are hollow for the first ...
More developed infants will typically require a longer gestation period. Altricial mammals needs less time to gestate compare to the precocial (well-developed neonate) mammal. A typical precocial mammal has a gestation period almost four times longer than a typical altricial mammal of the same body size. [34]
Gestation, called pregnancy in humans, is the period of time during which the fetus develops, dividing via mitosis inside the female. During this time, the fetus receives all of its nutrition and oxygenated blood from the female, filtered through the placenta, which is attached to the fetus' abdomen via an umbilical cord.
Scientists studying the sperm whales that live around the Caribbean island of Dominica have described for the first time the basic elements of how they might be talking to each other, in an effort ...
Spermaceti is taken from the spermaceti organ (yellow) and junk (orange) within the sperm whale's head. Raw spermaceti is liquid within the head of the sperm whale, and is said to have a smell similar to raw milk. [8] It is composed mostly of wax esters (chiefly cetyl palmitate) and a smaller proportion of triglycerides. [9]
Sperm whales, narwhals, many ... (blue, red teeth) shortly before the end of gestation ... Whales were intensively hunted during this time; in the 1930s, 30,000 ...
It was a member of a group of macroraptorial sperm whales (or "raptorial sperm whales") and was probably an apex predator, preying on whales, seals and so forth. Characteristically of raptorial sperm whales, Livyatan had functional, enamel -coated teeth on the upper and lower jaws, as well as several features suitable for hunting large prey.
The pygmy sperm whale ... Once a female whale is impregnated, the average gestation ... and remains there motionless for some time. In Japan, the whale was ...