cline

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cline

(klīn),
A systematic relation between location and the frequencies of alleles; lines connecting points of equal frequency are termed isoclines, and the direction of the cline at any point is at right angles to an isocline.
[G. klinō, to slope]

cline

(klīn)
n.
A gradual change in a character or feature across the distributional range of a species or population, usually correlated with an environmental or geographic transition.

clin′al (klī′nəl) adj.

cline

a gradual and continuous (or nearly continuous) change in a character (such as size or colour) in relation to its geographical or ecological distribution. For example, there is an increase in the percentage of bridled forms in the guillemot population with more northerly latitudes.
References in periodicals archive ?
The absolute difference between slopes was computed for each pair of bootstrap subsamples to produce an empirical distribution of the expected difference between slopes under the null hypothesis of clinal homogeneity across transects.
095, respectively) with the two central regions establishing a clinal trend from south to north (0.
Al analizar la variacion clinal en La Espanola se incluyo una especie fosil que se desvio del comportamiento de las especies actuales, lo que se interpreto como que el patron era de origen reciente (Gould y Paull, 1977).
Compared to lipopolysaccharide inject model, CLP model can simulate the progress of polymicrobial sepsis which is more similar to the progress of sepsis in clinal [8].
Ademas, una comparacion de este rasgo en especies de Aristolochia pone en duda que se trate de un estado discreto, ya que se observa una variacion interespecifica clinal, desde utriculos no constrictos basalmente (Fig.
virginica, De la Rosa-Velez & Rodriguez-Romero (1988) utilizando la misma metodologia de analisis de isoenzimas, encontraron una variacion clinal en donde la mayor similitud genetica se encontro entre las poblaciones del sureste de Mexico que ha sido interpretada como una tendencia a la evolucion independiente de las poblaciones de ostiones a ambos lados de la laguna Madre de Tamaulipas.
Despite this clinal and intrapopulation variation in color (Pocock, 1941), there is no record of an ocelot possessing white coloration anywhere except the belly.
Indeed, strong clinal gradients in allozyme allele frequencies [5, 28] and mtDNA haplotypes [3,6] have been found in this species.
Though many of his numbers, assumptions, theories, and conclusions have been revised and corrected over the four decades since he published, his results remain important for demonstrating that the allele frequencies in question are clinal, are correlated with malaria, and involve multiple genetic loci and multiple alleles.
Although the number of anal rays could be a character with latitudinal clinal variation, we did not detect this trend because specimens examined here from an intermediate area (Rio Tanquilin, San Luis Potosi) had a lower number of anal rays (mean = 22) when compared with southern specimens of Chiapas (mean = 26).