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Coahuiltecan. The Coahuiltecan were various small, autonomous bands of Native Americans who inhabited the Rio Grande valley in what is now northeastern Mexico and southern Texas. [1] The various Coahuiltecan groups were hunter gatherers. First encountered by Europeans in the 16th century, their population declined due to European diseases ...
Shoaling and schooling. These powder blue tangs are shoaling. They are swimming somewhat independently, but in such a way that they stay connected, forming a social group. These bluestripe snapper are schooling. They are all swimming in the same direction in a coordinated way. In biology, any group of fish that stay together for social reasons ...
The lateral line in fish and aquatic forms of amphibians is a detection system of water currents, consisting mostly of vortices. The lateral line is also sensitive to low-frequency vibrations. It is used primarily for navigation, hunting, and schooling. The mechanoreceptors are hair cells, the same mechanoreceptors for vestibular sense and hearing.
Karankawa people. The Karankawa / kəˈræŋkəwə / [3] were an Indigenous people concentrated in southern Texas along the coast of the Gulf of Mexico, largely in the lower Colorado River and Brazos River valleys. [4] They consisted of several independent, seasonal nomadic groups who shared a language and some culture.
Winter is upon the North Texas and Southwestern Oklahoma region and the conditions of this season present challenges to our region’s wild animals. 'Move, change or die': How these animals adapt ...
Freshwater fish are fish species that spend some or all of their lives in bodies of fresh water such as rivers, lakes and inland wetlands, where the salinity is less than 1.05%. These environments differ from marine habitats in many ways, especially the difference in levels of osmolarity. To survive in fresh water, fish need a range of ...
The team followed the octopuses for 13 hunts, during which they observed groups of between two and 10 fish working with each octopus. These hunting groups typically included several species of ...
Fish and other aquatic animals live in a different light environment than terrestrial species do. Water absorbs light so that with increasing depth the amount of light available decreases quickly. The optical properties of water also lead to different wavelengths of light being absorbed to different degrees. For example, visible light of long ...