Sampling scale can cause bias in positive assortative mating estimates: evidence from two intertidal snails

Authors: Ng, T.P.T., Williams, G.A., Davies, M.S., Stafford, R. and Rolán-Alvarez, E.

Journal: Biological Journal of the Linnean Society

Volume: 119

Issue: 2

Pages: 414-419

eISSN: 1095-8312

ISSN: 0024-4066

DOI: 10.1111/bij.12839

Abstract:

Assortative mating in the wild is commonly estimated by correlating between traits in mating pairs (e.g. the size of males and females). Unfortunately, such an approach may suffer from considerable sampling bias when the distribution of different expressions of a trait in the wild is nonrandom (e.g. when segregation of different size classes of individuals occurs in different microhabitats or areas). Consequently, any observed trait correlation in the wild can be an artefact of pooling heterogeneous samples of mating pairs from different microhabitats or areas rather than true nonrandom matings. This bias in estimating trait correlations as a result of sampling scale is termed the scale-of-choice effect (SCE). In the present study, we use two intertidal littorinid species from Hong Kong to show how the SCE can bias size-assortative mating estimates from mating pairs captured in the wild, empirically demonstrating the influence of this effect on measures of positive assortative mating. This finding cautions that studies overlooking the SCE may have misinterpreted the magnitude and the cause of assortative mating, and we provide a new analytical approach for protecting against this potential bias in future studies.

http://eprints.bournemouth.ac.uk/23422/

Source: Scopus

Sampling scale can cause bias in positive assortative mating estimates: evidence from two intertidal snails

Authors: Ng, T.P.T., Williams, G.A., Davies, M.S., Stafford, R. and Rolan-Alvarez, E.

Journal: BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY

Volume: 119

Issue: 2

Pages: 414-419

eISSN: 1095-8312

ISSN: 0024-4066

DOI: 10.1111/bij.12839

http://eprints.bournemouth.ac.uk/23422/

Source: Web of Science (Lite)

Sampling scale can cause bias in positive assortative mating estimates: The first 1 evidence in two intertidal snails

Authors: Ng, T.P.T., Williams, G.A., Davies, M.S., Stafford, R. and Rolán-Alvarez, E.

Journal: Biological Journal of the Linnean Society

Publisher: Linnean Society of London

ISSN: 1095-8312

http://eprints.bournemouth.ac.uk/23422/

Source: Manual

Sampling scale can cause bias in positive assortative mating estimates: The first evidence in two intertidal snails

Authors: Ng, T.P.T., Williams, G.A., Davies, M.S., Stafford, R. and Rolán-Alvarez, E.

Journal: Biological Journal of the Linnean Society

Volume: 119

Issue: 2

Pages: 414-419

ISSN: 1095-8312

Abstract:

Assortative mating in the wild is commonly estimated by correlating between traits in mating pairs (e.g. size of males and females). Unfortunately such an approach may suffer from considerable sampling bias when the distribution of different expressions of a trait in the wild is non-random; for example, when segregation of different size classes of individuals occur in different microhabitats or areas.

Consequently, any observed trait correlation in the wild can be an artifact of pooling heterogeneous samples of mating pairs from different microhabitats or areas rather than true non-random matings. This bias in estimating trait correlations due to sampling scale is termed the scale-of-choice effect (SCE). Here we use two intertidal littorinid species from Hong Kong to show how the SCE can bias size-assortative mating estimates from mating pairs captured in the wild, empirically demonstrating the influence of this effect on measures of positive assortative mating. This finding cautions that studies that have overlooked SCE may have misinterpreted the magnitude and the cause of assortative mating, and we provide a new analytical approach to protect against this potential bias in future studies.

http://eprints.bournemouth.ac.uk/23422/

Source: BURO EPrints