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Compared to similarly sized fish, mammals and birds typically have brain sizes fifteen times larger, though some species of fish such as elephantnose fish have very large brain-to-body ratios. However, fish still display intelligence that cannot be explained through Pavlovian and operant conditioning, such as reversal learning, novel obstacle ...
Results from this study suggest that current evidence for general intelligence is weak in non-human animals. [130] The general factor of intelligence, or g factor, is a psychometric construct that summarizes the correlations observed between an individual's scores on various measures of cognitive abilities.
Anadromous – fish that live their adult lives in the ocean but migrate up fresh water rivers to spawn. Examples are Pacific salmon. Fish that migrate in the opposite direction are called catadromous. Anoxic sea water – sea water depleted of oxygen. See hypoxia. Anoxic sediments – sediments depleted of oxygen.
From the film, a book entitled Fish! A Remarkable Way to Boost Morale and Improve Results , by Stephen C. Lundin, Harry Paul, and John Christensen was written. [ 3 ] When Christensen and his team examined the footage, they identified four simple practices anyone could apply to their work and life. [ 4 ]
Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish ().According to FishBase, 33,400 species of fish had been described as of October 2016, with approximately 250 new species described each year.
Books about ethics, a branch of philosophy that "involves systematizing, defending, and recommending concepts of right and wrong behavior". Subcategories This category has the following 5 subcategories, out of 5 total.
A fisheries study in Sri Lanka and India estimated that over 1000 were being sold in the country's fish markets each year. [48] By comparison, M. birostris populations at most of the key aggregation sites around the world are estimated to have significantly fewer than 1000 individuals. [49]
Red represents a higher value (e.g. of temperature or the partial pressure of a gas) than blue so the property being transported in the channels flows from red to blue. In fish a countercurrent flow (lower diagram) of blood and water in the gills is used to extract oxygen from the environment. [6] [7] [8] All basal vertebrates breathe with gills.