scholarly journals Variance in Reproductive Success is Driven by Environmental Factors, not Mating System, in Bonytails

2018 ◽  
Vol 147 (6) ◽  
pp. 1100-1114 ◽  
Author(s):  
Megan J. Osborne ◽  
Alyssa V. Sanchez ◽  
Thomas E. Dowling ◽  
Thomas F. Turner
Keyword(s):  
Reproductive Success ◽  
Environmental Factors ◽  
Mating System ◽  
Variance In Reproductive Success

Variation in reproductive success of male and female Columbian ground squirrels (Urocitellus columbianus)

2012 ◽  
Vol 90 (6) ◽  
pp. 736-743 ◽  
Author(s):  
Philip H. Jones ◽  
Jeffrey L. Van Zant ◽  
F. Stephen Dobson
Keyword(s):  
Reproductive Success ◽  
Mating System ◽  
Multiple Paternity ◽  
Ground Squirrels ◽  
Male Reproductive Success ◽  
Offspring Production ◽  
Bateman Gradient ◽  
Coefficients Of Variation ◽  
Males And Females ◽  
Columbian Ground Squirrels

The imbalanced reproductive success of polygynous mammals results in sexual selection on male traits like body size. Males and females might have more balanced reproductive success under polygynandry, where both sexes mate multiply. Using 4 years of microsatellite DNA analyses of paternity and known maternity, we investigated variation in reproductive success of Columbian ground squirrels, Urocitellus columbianus (Ord, 1815); a species with multiple mating by both sexes and multiple paternity of litters. We asked whether male reproductive success was more variable than that of females under this mating system. The overall percentage of confirmed paternity was 61.4% of 339 offspring. The mean rate of multiple paternity in litters with known fathers was 72.4% (n = 29 litters). Estimated mean reproductive success of males (10.27 offspring) was about thrice that of females (3.11 offspring). Even after this difference was taken into account statistically, males were about three times as variable in reproductive success as females (coefficients of variation = 77.84% and 26.74%, respectively). The Bateman gradient (regression slope of offspring production on number of successful mates) was significantly greater for males (βM = 1.44) than females (βF = 0.28). Thus, under a polygynandrous mating system, males exhibited greater variation in reproductive success than females.

scholarly journals Genetic evidence for the mating system and reproductive success of black sea bream ( Acanthopagrus schlegelii )

2020 ◽  
Vol 10 (10) ◽  
pp. 4483-4494
Author(s):  
Xi Wang ◽  
Su Liu ◽  
Yuqing Yang ◽  
Lina Wu ◽  
Wenhua Huang ◽  
...  
Keyword(s):  
Reproductive Success ◽  
Mating System ◽  
Black Sea ◽  
Genetic Evidence ◽  
Sea Bream ◽  
Acanthopagrus Schlegelii
Sign in / Sign up

Export Citation Format

Share Document