Search results
Results from the WOW.Com Content Network
The kiwi is a family of nocturnal birds endemic to New Zealand.. While it is difficult to say which came first, nocturnality or diurnality, a hypothesis in evolutionary biology, the nocturnal bottleneck theory, postulates that in the Mesozoic, many ancestors of modern-day mammals evolved nocturnal characteristics in order to avoid contact with the numerous diurnal predators. [3]
The decreased light intensity, replicates the typical lighting experienced at night time that stimulate the planktonic organisms to migrate. During an eclipse, some copepod species distribution is concentrated near the surface, for example Calanus finmarchicus displays a classic diurnal migration pattern but on a much shorter time scale during ...
Swimming is a popular activity and competitive sport where certain techniques are deployed to move through water. It offers numerous health benefits, such as strengthened cardiovascular health, muscle strength, and increased flexibility. It is suitable for people of all ages and fitness levels.
Swim instructors presume that their students want to learn at least one major stroke, probably “freestyle” or what used to be called the front crawl. Even people teaching swimming have been ...
Black People Will Swim, based in Queens, N.Y., teaches hundreds of New Yorkers of color, with limited pool access, how to swim each year.
Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
The World Open Water Swimming Association (WOWSA) defines an "assisted swim" as one in which a "swimmer uses or benefits from any possible number of objects," like shark cages, wetsuits and ...
The swim bladder (marked here as S and S') of Alburnoides bipunctatus. The swim bladders of large numbers of mesopelagic fishes cause sonar waves to be reflected in a recognisable layer. The deep scattering layer, sometimes referred to as the sound scattering layer, is a layer in the ocean consisting of a variety of marine animals.