Das Rechts-Links-Problem im Tierreich und Beim Menschen

Ludwig, Wilhelm

doi:10.1007/978-3-662-29196-2

Cited by 130 publications

(115 citation statements)

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“…Fluctuating asymmetry arises when individuals fail to achieve identical development of an otherwise bilaterally symmetrical trait on both sides of their body (Ludwig 1932;Van Valen 1962). Since both sides of a bilaterally symmetrical trait develop as a result of the same genome, fluctuating asymmetry represents a measure of the sensitivity of development to factors affecting homeostasis (Palmer and Strobeck 1986;Parsons 1990).…”

Section: Condition Dependencementioning

confidence: 99%

Why have birds got multiple sexual ornaments?

Møller

Pomiankowski

1993

Behav Ecol Sociobiol

668

517

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Section: Condition Dependencementioning

confidence: 99%

Why have birds got multiple sexual ornaments?

Møller

Pomiankowski

1993

Behav Ecol Sociobiol

668

517

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“…Failure to complete such stable phenotypic development can be assessed by the level of fluctuating asymmetry (FA), or the frequency of phenodeviants. FAs denote diminutive, accidental departures from symmetry in otherwise bilateral symmetrical characters, whereas phenodeviance encloses relatively large and conspicuous morphological anomalies, such as having the heart on the right side of the body cavity, or the presence of an even number of fingers on a hand (Ludwig 1932;Van Valen 1962;Møller and Swaddle 1997). Development of the left and right sides of a paired trait is presumably controlled by an identical set of genetic instructions, and to produce the ideal phenotype individuals are recurrently buffered against developmental insults by employing homeostatic mechanisms (Møller and Swaddle 1997).…”

Section: Introductionmentioning

confidence: 97%

Fluctuating asymmetry in farmed Atlantic salmon (Salmo salar) juveniles: also a maternal matter?

Eriksen

Espmark

Poppe³

et al. 2006

Environ Biol Fish

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Developmental stability reflects the degree to which phenotypic expression is unaffected by random accidents or developmental noise. Developmental stability may be measured by phenodeviance or fluctuating asymmetry (FA), and estimation of developmental stability has attracted substantial interest because it appears to represent a relatively simple method to identify sub lethal stress exposure and to assess animal welfare. As a part of a long-term study, the work presented here primarily aimed to investigate impacts on developmental instability in farmed salmon offspring ten months post hatch attributable to maternal cortisol administration prior to spawning and mild hyperthermia exerted during incubation. Main results show that maternal cortisol enhancement increased the level of FA in pectoral and pelvic fins, but did not affect the frequency of malformations in offspring. Mild hyperthermia during incubation increased weight and fork length and also increased pelvic fin FA. Malformed fish were heavier and longer than the normal ones, and pelvic fin asymmetry was positively related to condition factor. These results illustrate plausible lasting impacts on offspring development due to the maternal endocrinological state at spawning and indicate that developmental instability in farmed salmon juveniles may mirror aspects of the broodstock's housing conditions.

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“…Such deviations re¯ect the ability of the individual to control developmental processes under given environmental conditions, and¯uctuating asymmetry therefore provides a direct measure of developmental instability (e.g. Ludwig 1932;Parsons 1990;Mùller and Swaddle 1997). A large number of genetic and environmental factors are known to aect asymmetry and alternative measures of developmental instability in plants (Mather 1946;Paxman 1956;Huether 1968Huether , 1969Bagchi and Iyama 1983;Bagchi et al 1989;Ellstrand 1983;Martin and Sutherland 1990;Freeman et al 1993;Mùller 1995aMùller , b, 1996Evans and Marshall 1996;Sherry and Lord 1996a, b;Mùller and Swaddle 1997).…”

Section: Introductionmentioning

confidence: 97%

Insect preference for symmetrical artificial flowers

Møller

Sorci

1998

Oecologia

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An insect preference for floral symmetry may be maintained because plants with symmetrical flowers, which are able to control developmental processes under given environmental conditions, also are able to provide more pollinator rewards than plants with asymmetrical flowers. Alternatively, insects may have an inherent preference for symmetrical structures and thereby impose selection for the maintenance of symmetry in flowers even in the absence of any pollinator rewards. We tested for an insect preference for radially symmetrical flowers by using horizontally placed units of four circular coloured flower models varying in size and symmetry. The shape and colour of the model flowers did not resemble any naturally occurring flowers in the environment. Insects and Hymenoptera, respectively (five species of Diptera and one species of Coleoptera) that visited the flower models clearly preferred symmetrical models over asymmetrical ones, and the ranking of visits to the models reflected a preference for large, symmetrical flowers. These results provide evidence for a preference for symmetrical flower models, even in the absence of pollinator rewards.

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Das Rechts-Links-Problem im Tierreich und Beim Menschen

Cited by 130 publications

References 0 publications

Why have birds got multiple sexual ornaments?

Why have birds got multiple sexual ornaments?

Fluctuating asymmetry in farmed Atlantic salmon (Salmo salar) juveniles: also a maternal matter?

Insect preference for symmetrical artificial flowers

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