Alternative male morphs solve sperm performance/longevity trade-off in opposite directions

Autor: Olivier Goffinet, Michael Taborsky, G. Sander van Doorn, Dolores Schütz
Přispěvatelé: Van Doorn group
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Male
0106 biological sciences
0301 basic medicine
01 natural sciences
Sexual Behavior
Animal
EXTERNAL FERTILIZATION
ATLANTIC SALMON
External fertilization
Research Articles
Sperm motility
reproductive and urinary physiology
COMPETITION GAMES
media_common
EJACULATE TRAITS
Multidisciplinary
SEXUAL SIZE DIMORPHISM
biology
medicine.diagnostic_test
Reproduction
SciAdv r-articles
CICHLID FISH
Cichlids
Spermatozoa
medicine.anatomical_structure
Sperm Motility
590 Animals (Zoology)
Gamete
Research Article
endocrine system
Cell Survival
media_common.quotation_subject
Zoology
Semen analysis
010603 evolutionary biology
XIPHOPHORUS-NIGRENSIS
BLUEGILL LEPOMIS-MACROCHIRUS
Lamprologus callipterus
03 medical and health sciences
medicine
Animals
Sperm competition
Evolutionary Biology
urogenital system
fungi
REPRODUCTIVE TACTICS
LAMPROLOGUS-CALLIPTERUS
biology.organism_classification
Sperm
Semen Analysis
030104 developmental biology
Zdroj: Science Advances
Taborsky, Michael; Schütz, Dolores; Goffinet, Olivier; van Doorn, Gerrit Sander (2018). Alternative male morphs solve sperm performance/longevity trade-off in opposite directions. Science Advances, 4(5), eaap8563. American Association for the Advancement of Science 10.1126/sciadv.aap8563
Science Advances, 4(5):8563. AMER ASSOC ADVANCEMENT SCIENCE
ISSN: 2375-2548
DOI: 10.1126/sciadv.aap8563
Popis: Bourgeois and parasitic males produce sperm maximizing either performance or endurance, according to divergent spawning roles.
Males pursuing alternative reproductive tactics have been predicted to face a trade-off between maximizing either swimming performance or endurance of their sperm. However, empirical evidence for this trade-off is equivocal, which may be due to simplistic assumptions. In the shell-brooding cichlid fish Lamprologus callipterus, two Mendelian male morphs compete for fertilization by divergent means: Bourgeois nest males ejaculate sperm, on average, about six times farther from the unfertilized ova than do parasitic dwarf males. This asymmetry is opposite to the usual situation, in which bourgeois males typically benefit from superior fertilization opportunities, suggesting that nest males’ sperm should persist longer than dwarf male sperm. The assumed trade-off between sperm swimming performance and longevity predicts that, in turn, sperm of dwarf males should outperform that of nest males in swimming efficiency. Measurement of sperm performance and endurance reveals that dwarf male spermatozoa swim straighter initially than those of nest males, but their motility declines earlier and their velocity slows down more abruptly. Nest male sperm survives longer, which relates to a larger sperm head plus midpiece, implying more mitochondria. Thus, the trade-off between sperm performance and endurance is optimized in opposite directions by alternative male morphs. We argue that the relative success of alternative sperm performance strategies can be influenced strongly by environmental factors such as the time window between gamete release and fertilization, and the position of gamete release. This is an important yet little understood aspect of gametic adaptations to sperm competition.
Databáze: OpenAIRE
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