What is the meaning of physeter?
Definition of Physeter : the type genus of the family Physeteridae comprising the sperm whales.
Where did the term sperm whale come from?
They are named after the waxy substance—spermaceti—found in their heads. The spermaceti is an oil sac that helps the whales focus sound.
Why is cachalot called sperm whale?
Etymology. The name “sperm whale” is a clipping of “spermaceti whale”. Spermaceti, originally mistakenly identified as the whales’ semen, is the semi-liquid, waxy substance found within the whale’s head.
What is meant by sperm whales?
: a very large toothed whale (Physeter macrocephalus synonym P. catodon) that has large conical teeth in the lower jaw, a single blowhole, and a massive squarish head with a closed cavity containing a fluid mixture of spermaceti and oil, and that may reach a length in the male of nearly 60 feet (18.3 meters)
How old is the physeter?
Some extremely poorly known fossil species have also been assigned to the same genus including Physeter antiquus (5.3 – 2.6 mya) from the Pliocene of France, and Physeter vetus (2.6 mya – 12 ka) from the Quaternary of Georgia.
What was spermaceti used for?
spermaceti, a wax, liquid at body temperature, obtained from the head of a sperm whale or bottlenose whale. Spermaceti was used chiefly in ointments, cosmetic creams, fine wax candles, pomades, and textile finishing; later it was used for industrial lubricants.
What is the meaning of sperm in human body?
semen, also called seminal fluid, fluid that is emitted from the male reproductive tract and that contains sperm cells, which are capable of fertilizing the female’s eggs. Semen also contains liquids that combine to form seminal plasma, which helps keep the sperm cells viable. male reproductive organs.
Why was spermaceti so valuable?
While spermaceti was only one of the products removed from the sperm whale, its importance in artificial lighting and its significance in the increased hunting of the sperm whale marks it as a major factor in the history of whaling. Spermaceti was also significant for reasons unrelated to lighting.
Is spermaceti still used today?
sulfate and spermaceti are still being used by some companies today despite the proven fact that whale meat and blubber contain a huge amount of toxins and can be mortal to consume one way or the other.. Ambergris, is another whale ingredient derived from the waxy oil that lines whale’s stomachs.
Why does sperm go from white to clear?
Normally, semen is a thick, whitish liquid. However, several conditions can change the color and consistency of semen. Watery semen can be a sign of low sperm count, indicating possible fertility problems. Ejaculating thin, clear semen may also be a temporary condition with no serious health concerns.
What is the origin of the word “Physeter”?
Join Our Free Trial Now! New Latin, from Latin, sperm whale, from Greek physētēr bellows, blowhole of a whale, sperm whale; akin to Greek physa bellows “Physeter.”
Where can I find information related to Physeter macrocephalus?
Wikispecies has information related to Physeter macrocephalus. Wikisource has the text of the 1911 Encyclopædia Britannica article ” Sperm-Whale “. The Dominica Sperm Whale Project – a long-term scientific research program focusing on the behaviour of sperm whale units.
Is there a forestomach in Physeter catodon?
The forestomach is present in Physeter catodon, where it was approximately 140 by 140 cm and lined with yellowish-white epithelium in a 15.6 m male. The forestomach is absent in all ziphiids, and present in all species of mysticetes.