On the Variability of Alligator Sex Ratios

1980 ◽  
Vol 116 (1) ◽  
pp. 125-137 ◽  
Author(s):  
James D. Nichols ◽  
Robert H. Chabreck
Keyword(s):  
Sex Ratios

Spatiotemporal sex ratios of a dioecious marine green alga Monostroma latissimum (Kütz.) Wittr.

2009 ◽  
Vol 11 (2) ◽  
pp. 141-150 ◽  
Author(s):  
F. Bast ◽  
M. Hiraoka ◽  
K. Okuda
Keyword(s):  
Green Alga ◽  
Sex Ratios ◽  
Monostroma Latissimum ◽  
Marine Green Alga

Conservation Status and Sex Ratios of the Coahuila Box Turtle (Terrapene coahuila) in the Cuatro Ciénegas Valley of Coahuila, Mexico, 2011–2018

2020 ◽  
Vol 19 (1) ◽  
pp. 14
Author(s):  
Gamaliel Castañeda Gaytan ◽  
Ernesto Becerra-López ◽  
Sara Valenzuela-Ceballos ◽  
Miguel Borja-Jiménez ◽  
Bruno Rodríguez-López ◽  
...  
Keyword(s):  
Conservation Status ◽  
Sex Ratios ◽  
Box Turtle ◽  
Cuatro Ciénegas

Parental Expenditure and Offspring Sex Ratios in the Dioecious Plant Silene alba (= Silene latifolia)

1996 ◽  
Vol 147 (5) ◽  
pp. 870-879 ◽  
Author(s):  
Douglas R. Taylor
Keyword(s):  
Sex Ratios ◽  
Silene Latifolia ◽  
Dioecious Plant ◽  
Offspring Sex ◽  
Silene Alba ◽  
Parental Expenditure

The Adaptive Value of Male-Biased Sex Ratios Among Stressed Animals

1984 ◽  
Vol 124 (4) ◽  
pp. 597-599 ◽  
Author(s):  
Mark A. McGinley
Keyword(s):  
Sex Ratios ◽  
Adaptive Value

The Evolution of Highly Skewed Sex Ratios in Aphelinid Wasps

1990 ◽  
Vol 136 (5) ◽  
pp. 715-721 ◽  
Author(s):  
H. C. J. Godfray ◽  
J. K. Waage
Keyword(s):  
Sex Ratios

Sex ratio and life history traits at reaching sexual maturity in the dioecious shrub Fuchsia parviflora: field and common garden experiments

2021 ◽  
pp. 1-6
Author(s):  
Jessica S. Ambriz ◽  
Clementina González ◽  
Eduardo Cuevas
Keyword(s):  
Natural Population ◽  
Sexual Maturity ◽  
Sex Ratios ◽  
Natural Populations ◽  
Common Garden ◽  
Common Garden Experiment ◽  
Trade Offs ◽  
Reproductive Biomass ◽  
Common Garden Experiments ◽  
Growth And Reproduction

Abstract Fuchsia parviflora is a dioecious shrub that depends on biotic pollination for reproduction. Previous studies suggest that the male plants produce more flowers, and male-biased sex ratios have been found in some natural populations. To assess whether the biased sex ratios found between genders in natural populations are present at the point at which plants reach sexual maturity, and to identify possible trade-offs between growth and reproduction, we performed a common garden experiment. Finally, to complement the information of the common garden experiment, we estimated the reproductive biomass allocation between genders in one natural population. Sex ratios at reaching sexual maturity in F. parviflora did not differ from 0.5, except in one population, which was the smallest seedling population. We found no differences between genders in terms of the probability of germination or flowering. When flowering began, female plants were taller than males and the tallest plants of both genders required more time to reach sexual maturity. Males produced significantly more flowers than females, and the number of flowers increased with plant height in both genders. Finally, in the natural population studied, the investment in reproductive biomass was seven-fold greater in female plants than in male plants. Our results showed no evidence of possible trade-offs between growth and reproduction. Despite the fact that female plants invest more in reproductive biomass, they were taller than the males after flowering, possibly at the expense of herbivory defence.

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