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Seasonal and age-related changes in sperm quality of farmed arctic charr (Salvelinus alpinus)
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Seasonal and age-related changes in sperm quality of farmed arctic charr (Salvelinus alpinus)
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Journal Article
Seasonal and age-related changes in sperm quality of farmed arctic charr (Salvelinus alpinus)
2023
Overview
Background
Substantial variation in male fertility is regularly observed in farmed Arctic charr. However, detailed investigations of its fluctuation during a reproductive season and across years are lacking. Furthermore, information about the effect of underlying genetic factors influencing sperm quality is scarce. The current study focused on seasonal and age-related factors that may affect sperm quality characteristics in males reared in natural and delayed photoperiods. Animals were sampled three times for two consecutive years, and sperm quality parameters were recorded using a computer-assisted sperm analysis (CASA) system. Thereafter, high-throughput sequencing technologies were applied, aiming to identify genomic regions related to the variation of sperm quality throughout the reproductive season.
Results
An across-season variation in the recorded sperm quality parameters was evident. Overall, 29% and 42% of males from the natural and delayed spawning groups had a highly variable total progressive motility. Males at four years of age showed significantly higher sperm motility and velocities during the early October and November recordings compared to the following year when the same animals were five years of age. On the other hand, the opposite was observed regarding sperm concentration during the last sampling. A genome-wide
F
ST
scan detected SNP differentiation among males with high and low variability in total progressive motility (PM) on eight chromosomes (
F
ST
> 0.17), Genome wide windows with the highest
F
ST
contained SNPs in proximity (within 250 kb up- and downstream distance) to 16 genes with sperm quality biological functions in mammalian species.
Conclusion
Our findings provide a detailed view of seasonal, age-related, and genetic effects on sperm quality and can be used to guide decisions on broodstock selection and hatchery management.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Agricultural and Veterinary Sciences
/ Agriculture, Forestry and Fisheries
/ Analysis
/ Animal Genetics and Genomics
/ Animals
/ Biomedical and Life Sciences
/ Fish and Aquacultural Science
/ Fisk- och akvakulturforskning
/ Genomes
/ Genomics
/ Jordbruk, skogsbruk och fiske
/ Lantbruksvetenskap och veterinärmedicin
/ Males
/ Microbial Genetics and Genomics
/ Motility
/ Season
/ Seasons
/ Single-nucleotide polymorphism
/ Spawning
/ Sperm
/ Trends
/ Trout
/ Velocity
