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Diurnality, plant or animal behavior characterized by activity during the day and sleeping at night. Cathemeral, a classification of organisms with sporadic and random intervals of activity during the day or night. Matutinal, a classification of organisms that are only or primarily active in the pre-dawn hours or early night.
If food is plentiful, they can eat 10 times their own weight per day. [78] While Beroe preys mainly on other ctenophores, other surface-water species prey on zooplankton (planktonic animals) ranging in size from the microscopic, including mollusc and fish larvae, to small adult crustaceans such as copepods, amphipods, and even krill.
Mammals evolved from cynodonts, a group of superficially dog-like therapsid synapsids that survived the Permian–Triassic mass extinction.The emerging archosaurian sauropsids, including pseudosuchians, pterosaurs and dinosaurs and their ancestors, flourished after the Early Triassic Smithian–Spathian boundary event and competitively displaced the larger therapsids into extinction, leaving ...
They are sometimes called bugeaters, [1] their primary source of food being insects. Some New World species are called nighthawks. The English word nightjar originally referred to the European nightjar. Nightjars are found all around the world, with the exception of Antarctica, and certain island groups such as the Seychelles.
The pelagic food web, showing the central involvement of marine microorganisms in how the ocean imports nutrients from and then exports them back to the atmosphere and ocean floor. A marine food web is a food web of marine life. At the base of the ocean food web are single-celled algae and other plant-like organisms known as phytoplankton.
The dorsal and anal fins are fused with the caudal or tail fin, forming a single ribbon running along much of the length of the animal. [2] Most eels live in the shallow waters of the ocean and burrow into sand, mud, or amongst rocks. A majority of eel species are nocturnal and thus are rarely seen.
This can include naturally warmer waters or artificial warm water habitats produced by power plants/energy center outfalls. [96] Manatee cold stress syndrome can occur when there is prolonged exposure to water temperatures below the 20 degrees Celsius threshold, which can ultimately result in frostbite-like skin lesions, anorexia, fat atrophy ...
The group is commonly known as the "pepperwort family" or as the "water-clover family" because the leaves of the genus Marsilea superficially resemble the leaves of a four-leaf clover. In all, the family contains three genera and 50 to 80 species with most of those belonging to Marsilea. [1] [2]