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| Zuiderwijk, Annie. |
| Mechanisms controlling the distribution of amphibians in western Europe have been studied in France where related species, isolated from each other at least during the last glacial period, are now sympatric. Occurrences and biotope preferences of the various species were investigated in several regions, with attention to the position of each region within the ranges of the species: central or peripheral. For some species the previously known distribution boundary is partially precised. The population densities of related species in their zones of overlap are discussed. Three pairs of species are considered in particular. Triturus helveticus and T. vulgaris have a large sympatric area in which they appear to be gradually replacing one another. Competition... |
| Tipo: Article / Letter to the editor |
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| Ano: 1980 |
URL: http://www.repository.naturalis.nl/record/504319 |
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| Zuiderwijk, Annie. |
| Courtship display characteristics are described and compared for the newts Triturus cristatus and T. marmoratus and patterns of male competitive behaviour are recognized. In interpreting the data, the operational sex ratio has to be taken into account, which was highly biased towards males in both species, more in T. marmoratus than in T. cristatus. When sexual active, males of cristatus had more encounters than males of marmoratus, whereas the latter spent more time residing mating places. The male’s display towards a female differed in time structure, variability and in behaviour characteristics. T. marmoratus display follows a fixed pattern; males succeeded better in restraining a female than males cristatus did. Courting males cristatus allowed other... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Salamandridae; Triturus; Courtship behaviour; Sexual strategy; Competition. |
| Ano: 1990 |
URL: http://www.repository.naturalis.nl/record/504436 |
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| Zuiderwijk, Annie; Sparreboom, Max. |
| Mating and premating behaviour of the Crested Newt Triturus cristatus and the Marbled Newt T. marmoratus were studied in both the natural habitat and aquaria. Attention is focussed on male interactions. During the breeding period, males occupy open spots on the bottom of a pond defending these against other males. Such defense consists of a series of display movements, usually chasing the visiting male away. The male-male display has been interpreted as territorial behaviour. Territories are usually occupied for a period of one evening or less. Male-male encounters take place more frequently than male-female encounters. The observed behaviour has characteristics of lek-breeding. |
| Tipo: Article / Letter to the editor |
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| Ano: 1986 |
URL: http://www.repository.naturalis.nl/record/504130 |
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