‘Good-genes’ and ‘compatible-genes’ effects in an Alpine whitefish and the information content of breeding tubercles over the course of the spawning season

Autor: Claus Wedekind, Davnah Urbach, Rudolf Müller, Guillaume Evanno, Alain Jacob
Přispěvatelé: Swiss Fed Inst Aquat Sci & Technol, CH-6047 Kastanienbaum, Université de Lausanne, Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
Rok vydání: 2007
Předmět:
Male
0106 biological sciences
Embryo
Nonmammalian
Secondary sex characteristic
[SDV]Life Sciences [q-bio]
Plant Science
Breeding
Perl organ
01 natural sciences
Secondary sexual characters
Sexual Behavior
Animal
Copulation
Mating
media_common
Sex Characteristics
0303 health sciences
Breeding tubercles
biology
Ecology
Good-genes sexual selection
Reproduction
Organ Size
General Medicine
Survival Rate
medicine.anatomical_structure
Sexual selection
Female
Seasons
Salmonidae
Sex characteristics
Heterozygote
Gonad
media_common.quotation_subject
Zoology
010603 evolutionary biology
03 medical and health sciences
Embryo viability
Contact organ
Genetic variation
medicine
Genetics
Animals
14. Life underwater
Coregonus
Selection
Genetic
030304 developmental biology
Salmonids
Genetic Variation
Mating Preference
Animal
biology.organism_classification
Signaling
Genes
Insect Science
Salmonidae/embryology
Salmonidae/genetics
Animal Science and Zoology
Embryo
Nonmammalian/embryology
Mating Preference
Animal/physiology
Reproduction/physiology
Salmonidae/anatomy & histology
Zdroj: Genetica
Genetica, Springer Verlag, 2008, 132 (2), pp.199-208. ⟨10.1007/s10709-007-9164-3⟩
Genetica, vol. 134, no. 1, pp. 21-30
Genetica, vol. 132, no. 2, pp. 199-208
ISSN: 1573-6857
0016-6707
DOI: 10.1007/s10709-007-9164-3
Popis: Some models of sexual selection predict that individuals vary in their genetic quality and reveal some of this variation in their secondary sexual characteristics. Alpine whitefish (Coregonus sp.) develop breeding tubercles shortly before their spawning season. These tubercles are epidermal structures that are distributed regularly along the body sides of both males and females. There is still much unexplained variation in the size of breeding tubercles within both sexes and with much overlap between the sexes. It has been suggested that breeding tubercles function to maintain body contact between the mating partners during spawning, act as weapons for defence of spawning territories, or are sexual signals that reveal aspects of genetic quality. We took two samples of whitefish from their spawning place, one at the beginning and one around the peak of spawning season. We found that females have on average smaller breeding tubercles than males, and that tubercle size partly reveals the stage of gonad maturation. Two independent full-factorial breeding experiments revealed that embryo mortality was significantly influenced by male and female effects. This finding demonstrates that the males differed in their genetic quality (because offspring get nothing but genes from their fathers). Tubercle size was negatively linked to some aspects of embryo mortality in the first breeding experiment but not significantly so in the second. This lack of consistency adds to inconsistent results that were reported before and suggests that (i) some aspects of genetic quality are not revealed in breeding tubercles while others are, or (ii) individuals vary in their signaling strategies and the information content of breeding tubercles is not always reliable. Moreover, the fact that female whitefish have breeding tubercles of significant size while males seem to have few reasons to be choosy suggests that the tubercles might also serve some functions that are not linked to sexual signaling.
Databáze: OpenAIRE
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