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Jun 21, 2022 · The right eye of a California sea lion (Zalophus californianus) with a peripheral nerve sheath tumor, gross image of the globe and two histological images of the mass. ( a ) The left eye had almost complete depigmentation of the lateral conjunctiva, diffuse corneal edema with vascularization, ventrolaterally the cornea is thickened with an intrastromal mass that extends into the anterior ...
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To see better underwater, they got relative big eyes, and their pupil can expand and contract greatly to accomadate to near or complete darkness underwater to a sunny midday. On land, they are near-sighted, due to how their eyes are built. Regarding the reddness, the eyes are very vascularized. For all those muscles involved in the eye, and its ...
The Australian sea lion is a carnivore. They primarily feed on fish, birds, octopus and squid. Most of their prey is hunted on the sea floor. Most food will be swallowed whole though some is brought the surface to break apart. An adult female sea lion will require 8-10kg (17.6-22lbs) of food per day.
Sea lion. Sea lions are pinnipeds characterized by external ear flaps, long foreflippers, the ability to walk on all fours, short and thick hair, and a big chest and belly. Together with the fur seals, they make up the family Otariidae, eared seals. The sea lions have six extant and one extinct species (the Japanese sea lion) in five genera.
- Hearing
- Eyesight
- Tactile
- Smell
Hearing is one of the most important senses for a California sea lion. Researchers believe that under water, a California sea lion can hear sounds in the range of 1 to 40 kHz, with a peak sensitivity of 15 to 30 kHz. California sea lions generally vocalize between 1 to 4 kHz. The average hearing range for humans is about 0.02 to 20 kHz. Hearing in ...
Underwater vision is acute. Like other pinnipeds, California sea lions have rounded lenses that allow their eyes to focus on light that is refracted upon entering water. On land, California sea lions have good discrimination of bold outlines and rapid movements. Humans approaching too quickly will cause an alarm reaction. A sea lion's eyes are very...
California sea lions seek out physical contact with other sea lions. On land, California sea lions form groups, often touching and lying with each other. A sea lion uses its sensitive vibrissae to explore objects on land and in the water. A nerve network transmits tactile information from the vibrissae to the brain.
The olfactory lobes of the pinniped brain are generally small; however, on land, smell is important in female-pup recognition and male recognition of estrous females. Sea lions may be able to detect a human by smell from hundreds of meters away.
Mar 12, 2024 · When it comes to length, males can stretch up to 7 feet, while females typically max out around 6 feet. In the world of sea lions, size does matter. The larger males often dominate breeding territories, using their massive bulk as a billboard that says, “Back off, buddy, this beach is taken.”.
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Jun 6, 2007 · Steller sea lions give birth at rookeries where large males hold territories and fight off other bulls for the right to breed with one or more females. They have a polygamous breeding system. Males begin to come ashore at rookeries in mid-May, and will remain on land until mid-July without eating or drinking.
