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Bythotrephes longimanus (also Bythotrephes cederstroemi), or the spiny water flea, is a planktonic crustacean less than 15 millimetres (0.6 in) long. It is native to fresh waters of Northern Europe and Asia, but has been accidentally introduced and widely distributed in the Great Lakes area of North America since the 1980s.
The Diplostraca or Cladocera, commonly known as water fleas, is a superorder of small, mostly freshwater crustaceans, most of which feed on microscopic chunks of organic matter, though some forms are predatory. [2] Over 1000 species have been recognised so far, with many more undescribed.
The slope of the water table is known as the “hydraulic gradient”, which depends on the rate at which water is added to and removed from the aquifer and the permeability of the material. The water table does not always mimic the topography due to variations in the underlying geological structure (e.g., folded, faulted, fractured bedrock).
Water is the most important resource in the wild, but it isn’t just necessary for hydration. Birds need the water to clean their feathers and keep them parasite-free. Larger animals like bears ...
Arthropods like these northern prawn, and some mammals, detect water movement with sensory hairs such as whiskers, bristles or antennae. In animal physiology, hydrodynamic reception refers to the ability of some animals to sense water movements generated by biotic (conspecifics, predators, or prey) or abiotic sources.
Various species of yeti crabs have been found at varying locations. Four species have been described: Kiwa hirsuta discovered in 2005 on the Pacific-Antarctic Ridge, [8] Kiwa puravida discovered in 2006 at cold seeps in the East Pacific (all other species are from hydrothermal vents), [9] [10] Kiwa tyleri, known colloquially as the "Hoff crab", from the East Scotia Ridge, [11] [12] and Kiwa ...
In California, for example, the force-feeding of birds, which is how foie gras is made, is entirely illegal. Chicago, on the other hand, has entirely banned the sale of foie gras products.
Marine biogenic calcification is the production of calcium carbonate by organisms in the global ocean.. Marine biogenic calcification is the biologically mediated process by which marine organisms produce and deposit calcium carbonate minerals to form skeletal structures or hard tissues.