THE GENETICS OF POLYMORPHISM IN THE ROSS' GOOSE (<i>ANSER ROSSII</i>)

Cooke, Fred; Ryder, John P.

doi:10.1111/j.1558-5646.1971.tb01907.x

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Polymorphism can be found in all age classes and in the two sexes. With respect to age, this type of colour trait is restricted to nestlings in a number of species including some terns (Chaniot, 1970), the Ross' goose (Anser rossi ; Cooke & Ryder, 1971) and the mute swan (Cygnus olor ; Munro, Smith & Kupa, 1968). To have a better idea of the frequency of plumage polymorphism in juveniles and adults, I looked at the section on ' field characters ' in Raptors of the world (Ferguson-Lees & Christie, 2001).…”

Section: Frequency Of Genetic Colour Polymorphismmentioning

confidence: 99%

The evolution, maintenance and adaptive function of genetic colour polymorphism in birds

Roulin¹

2004

Biological Reviews

486

581

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The hypothesis that ornaments can honestly signal quality only if their expression is condition-dependent has dominated the study of the evolution and function of colour traits. Much less interest has been devoted to the adaptive function of colour traits for which the expression is not, or is to a low extent, sensitive to body condition and the environment in which individuals live. The aim of the present paper is to review the current theoretical and empirical knowledge of the evolution, maintenance and adaptive function of colour plumage traits for which the expression is mainly under genetic control. The finding that in many bird species the inheritance of colour morphs follows the laws of Mendel indicates that genetic colour polymorphism is frequent. Polymorphism may have evolved or be maintained because each colour morph facilitates the exploitation of alternative ecological niches as suggested by the observation that individuals are not randomly distributed among habitats with respect to coloration. Consistent with the hypothesis that different colour morphs are linked to alternative strategies is the finding that in a majority of species polymorphism is associated with reproductive parameters, and behavioural, life-history and physiological traits. Experimental studies showed that such covariations can have a genetic basis. These observations suggest that colour polymorphism has an adaptive function. Aviary and field experiments demonstrated that colour polymorphism is used as a criterion in mate-choice decisions and dominance interactions confirming the claim that conspecifics assess each other's colour morphs. The factors favouring the evolution and maintenance of genetic variation in coloration are reviewed, but empirical data are virtually lacking to assess their importance. Although current theory predicts that only condition-dependent traits can signal quality, the present review shows that genetically inherited morphs can reveal the same qualities. The study of genetic colour polymorphism will provide important and original insights on the adaptive function of conspicuous traits.

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Section: Frequency Of Genetic Colour Polymorphismmentioning

confidence: 99%

The evolution, maintenance and adaptive function of genetic colour polymorphism in birds

Roulin¹

2004

Biological Reviews

486

581

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“…They argue that selection favoring the acquisition of a con specific mate has resulted in the use of plumage coloration as one cue involved in species recognition. Such selection could have been acting even before the origin of the plumage dimorphism (Cooke and Ryder, 1970), in which case both color morphs would possess the same behavioral mechanism for species recognition but would differ in their gestalt image of a Lesser Snow Goose. Since the color component ofsuch an image is acquired through associations with parents and siblings and because pure pairs can have mixed-plumaged broods (e.g., as a result of intraspecific nest parasitism), some level of mixed mating is likely (Geramita et al, 1982).…”

Section: Discussionmentioning

confidence: 99%

LIFE HISTORY STUDIES OF THE LESSER SNOW GOOSE (ANSER CAERULESCENS CAERULESCENS). VI. PLUMAGE POLYMORPHISM, ASSORTATIVE MATING AND FITNESS

Findlay

Rockwell

Smith³

et al. 1985

Evolution

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Abstract.-We investigated the hypothesis that positive assortative mating for plumage coloration observed in populations of the dichromatic Lesser Snow Goose (Anser caerulescens caerulescens) evolved and persists due to selective advantages accruing to individuals choosing mates phenotypically similar to themselves. We examined potential differences between pure (white x white, blue x blue) and mixed (white x blue, blue x white) pairs for an array offitness components related to both fecundity and viability. While no differences were detected for most components, mixed pairs consistently enjoyed enhanced nesting success relative to their pure counterparts. In addition, pre-reproductive viability and female offspring recruitment were significantly greater for mixed pairs for some of the cohorts examined. Not only have we failed to find enhanced reproductive success associated with positive assortment, we have provided evidence that there is some advantage associated with negative assortment.In light of our findings, we suggest: 1) that positive assortment results from the use of familial color as one element in species recognition; 2) that the enhanced fitness of mixed pairs, particularly with respect to nesting success, results from complementation of parental behavior; and 3) that while negative assortment will not likely become the rule in this population, the selective advantage of mixed pairs is a potential determinant of pair type frequencies in the La Perouse Bay population.

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The adaptive significance of plumage polymorphism.

Atkinson¹

2004

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THE GENETICS OF POLYMORPHISM IN THE ROSS' GOOSE (ANSER ROSSII)

Cited by 3 publications

References 7 publications

The evolution, maintenance and adaptive function of genetic colour polymorphism in birds

The evolution, maintenance and adaptive function of genetic colour polymorphism in birds

LIFE HISTORY STUDIES OF THE LESSER SNOW GOOSE (ANSER CAERULESCENS CAERULESCENS). VI. PLUMAGE POLYMORPHISM, ASSORTATIVE MATING AND FITNESS

The adaptive significance of plumage polymorphism.

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