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SELECTION AND THE MAINTENANCE OF A COLOUR PATTERN POLYMORPHISM IN THE GREEN SWORDTAIL (XIPHOPHORUS HELLERI) 1 by DIERK FRANCK 2,4) , MARION DIKOMEY 2) and MANFRED SCHARTL 3,5) ( 2 Zoologisches Institut und Zoologisches Museum der Universität, Arbeitsbereich Ethologie, Martin-Luther-King-Platz3

In: Behaviour

Female preferences for dorsal fin and body size in Xiphophorus helleri : further investigation of the LPA bias in Poeciliid fishes R. David MacLaren 1) & David Daniska (Department of Biological Sciences, Kent State University, Tuscarawas, New Philadelphia, OH 44663, USA) (Accepted: 3 January

In: Behaviour

CONFLICT OUTCOME IN MALE GREEN SWORDTAIL FISH DYADS (XIPHOPHORUS HELLERI): INTERACTION OF BODY SIZE, PRIOR DOMINANCE/SUBORDINATION EXPERIENCE, AND PRIOR RESIDENCY by JACQUES P. BEAUGRAND1), DANIEL PAYETTE and CLAUDE GOULET2) (Unité d'Éthométrie, Département de Psychologie de l'Université du

In: Behaviour

ZUR FRAGE DER BIOLOGISCHEN BEDEUTUNG DES SCHWERTFORTSATZES VON XIPHOPHORUS HELLERI von DIERK FRANCK und ROLF HENDRICKS 1) (Zoologisches Institut und Zoologisches Museum der Universität Hamburg, B.R.D.) (Mit 4 Abb.) (Eingeg. 2o-XII-r97r) 1. F-INFOHRUNG i. Problemstellung Der Schwertfortsatz des

In: Behaviour

INFLUENCES OF PRIOR AGONISTIC EXPERIENCES ON AGGRESSION MEASURES IN THE MALE SWORDTAIL (XIPHOPHORUS HELLERI) by DIERK FRANCK and ALEXANDER RIBOWSKI1) (Zoologisches Institut und Zoologisches Museum der Universität Hamburg, B.R.D.) (With 10 Figures) (Acc. 18-III-1987) Introduction It is well

In: Behaviour

(pre-contest) cortisol levels and a smaller stress response (post contest minus pre-contest cortisol level) than the eventual contest losers. 2. Methods Green swordtails ( Xiphophorus helleri

In: Behaviour

SOCIAL ORGANIZATION OF SMALL HETEROSEXUAL GROUPS OF GREEN SWORDTAILS (XIPHOPHORUS HELLERI, PISCES, POECILIIDAE) UNDER CONDITIONS OF CAPTIVITY by JACQUES P. BEAUGRAND1)2), JEAN CARON and LOUISE COMEAU (Département de Psychologie, Université du Québec à Montréal, B.P. 8888, Montréal, P. Q. H3C 3P

In: Behaviour

, fourspine sticklebacks (Apeltes quadracus; a member of the same prey guild as the threespine stickleback) or swordtails (Xiphophorus helleri), a species not known to possess alarm pheromones and which is phylogenetically distant and allopatric from the threespine stickleback. Threespine sticklebacks

In: Behaviour

- parison becomes more difficult. We set out to test this prediction by offering female green swordtails, Xiphophorus helleri , dichotomous choices between different shoal sizes, varying both in ratios and absolute numbers of fish. Swordtails attended to the ratio of group size between stimulus shoals

In: Behaviour