Exaptation Definition Zoology

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The Evolutionary Concept of “Preadaptation” Applied to Cognitive ...

The Evolutionary Concept Of “Preadaptation” Applied To Cognitive ...

Mar 17, 2016 ... It has been proposed that this syndrome is defined as a defect in verbally mediated ... Exaptation—a missing term in the science of form. [ReadMore..]

Aptation - Oxford Reference

Aptation - Oxford Reference

"aptation" published on by null. ... or to processes other than selection or selection for a different function (exaptation). ... in A Dictionary of Zoology (3) Length: 18 words ... [ReadMore..]

Exaptation-A Missing Term in the Science of Form

Exaptation-A Missing Term In The Science Of Form

Exaptation-a missing term in the science of form. Stephen Jay Gould and Elisabeth S. Vrba*. Abstract.-Adaptation has been defined and recognized by two ... [ReadMore..]

Evolutionary Novelty versus Exaptation: Oral Kinematics in Feeding ...

Evolutionary Novelty Versus Exaptation: Oral Kinematics In Feeding ...

Species exposed to extreme environments often exhibit distinctive traits that help meet the demands of such habitats. Such traits could evolve independently, but under intense selective pressures of extreme environments some existing structures or behaviors might be coopted to meet specialized demands, evolving via the process of exaptation. We evaluated the potential for exaptation to have operated in the evolution of novel behaviors of the waterfall-climbing gobiid fish genus Sicyopterus. These fish use an “inching” behavior to climb waterfalls, in which an oral sucker is cyclically protruded and attached to the climbing surface. They also exhibit a distinctive feeding behavior, in which the premaxilla is cyclically protruded to scrape diatoms from the substrate. Given the similarity of these patterns, we hypothesized that one might have been coopted from the other. To evaluate this, we filmed climbing and feeding in Sicyopterus stimpsoni from Hawai’i, and measured oral kinematics for two comparisons. Jan 4, 2013 ... 2. Waterman TH (2001) The evolutionary challenges of extreme environments (Part 2). Journal of Experimental Zoology (Molecular Development and ... [ReadMore..]

Towards an Understanding of Stereotypic Behaviour in Laboratory ...

Towards An Understanding Of Stereotypic Behaviour In Laboratory ...

Stereotypic behaviour is an abnormal behaviour frequently seen in laboratory primates. It is considered an indication of poor psychological well-being in these animals. As it is seen in captive animals but not in wild animals, attention has been focused on the situations in which this behaviour develops. However, the emphasis of research has been on reducing or eliminating established stereotypic behaviour in laboratory primates. A wide range of animals, from canaries2 to polar bears3 to humans4,5,6 can exhibit stereotypes. Many different kinds of stereotyped behaviours have been defined ... [ReadMore..]

Exaptation in human evolution: how to test adaptive vs exaptive ...

Exaptation In Human Evolution: How To Test Adaptive Vs Exaptive ...

satisfying concept in evolutionary biology. Darwin was aware of the teleological remains of the prefix ad- joined with “aptus”, meaning at. [ReadMore..]

Exaptation - Wikipedia

Exaptation - Wikipedia

Exaptation and the related term co-option describe a shift in the function of a trait during evolution. For example, a trait can evolve because it served ... [ReadMore..]



The definitions are silent as to whether exaptations had been shaped by natural selection after cooption, although Gould and Vrba cite examples (e.g., ... [ReadMore..]

Individuality and adaptation across levels of selection: How shall we ...

Individuality And Adaptation Across Levels Of Selection: How Shall We ...

Two major clarifications have greatly abetted the understanding and fruitful expansion of the theory of natural selection in recent years: the acknowl... We show here that different features define Darwinian individuality across ... Gould and Vrba (47) defined exaptations as features evolved for one reason ... [ReadMore..]

paedomorphosis | biology | Britannica

Paedomorphosis | Biology | Britannica

paedomorphosis, also spelled Pedomorphosis, retention by an organism of juvenile or even larval traits into later life. There are two aspects of paedomorphosis: acceleration of sexual maturation relative to the rest of development (progenesis) and retardation of bodily development with respect to the onset of reproductive activity (neoteny). Classic examples include certain amphibian species in which development is arrested so that the larval form and aquatic habit persist as the organism attains sexual maturity and becomes capable of reproduction. In some species only a few morphological features are retarded, but the number of features retarded may differ from species to This definition raises occasional difficulties because in some species (e.g., monkeys and man) the exact time of conception may not be known. In these cases the ... [ReadMore..]

What is natural selection? | Natural History Museum

What Is Natural Selection? | Natural History Museum

Discover what natural selection theory is, how adaptations work, the story of Darwin's finches and whether we are still evolving. This means that feathers are an exaptation for flight, rather than an adaptation. Adaptations can also become outdated, such as the tough exterior of the ... [ReadMore..]