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Size-assortative mating in a natural population of viviparus ater (gastropoda: prosobranchia) in lake Zürich, Switzerland


Staub, R; Ribi, G (1995). Size-assortative mating in a natural population of viviparus ater (gastropoda: prosobranchia) in lake Zürich, Switzerland. Journal of Molluscan Studies, 61(2):237-247.

Abstract

The number of mating pairs, the size of the mating partners, and the distribution of individuals of Vivi-parus ater on a grid in Lake Zürich were recorded during one breeding season in 1990. There was positive assortative mating with respect to shell size. The proportion of copulating individuals ranged from 1% to 6% (average 3%) of the active population at any one time. Individual snails copulated 60 times on average from April until November. Snails were abundant and copulated in shallow water close to the shore in Spring. They moved towards deeper areas in Autumn. V. ater copulated on all substrates at any depth (1-9 m)of the grid. The spatial distribution of copulations throughout the summer reflected the pattern of snail abundance

Abstract

The number of mating pairs, the size of the mating partners, and the distribution of individuals of Vivi-parus ater on a grid in Lake Zürich were recorded during one breeding season in 1990. There was positive assortative mating with respect to shell size. The proportion of copulating individuals ranged from 1% to 6% (average 3%) of the active population at any one time. Individual snails copulated 60 times on average from April until November. Snails were abundant and copulated in shallow water close to the shore in Spring. They moved towards deeper areas in Autumn. V. ater copulated on all substrates at any depth (1-9 m)of the grid. The spatial distribution of copulations throughout the summer reflected the pattern of snail abundance

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Item Type:Journal Article, refereed, original work
Communities & Collections:National licences > 142-005
Dewey Decimal Classification:Unspecified
Scopus Subject Areas:Life Sciences > Aquatic Science
Life Sciences > Animal Science and Zoology
Language:English
Date:1 January 1995
Deposited On:12 Oct 2018 07:39
Last Modified:15 Apr 2021 14:49
Publisher:Oxford University Press
ISSN:0260-1230
OA Status:Green
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1093/mollus/61.2.237

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