Frequency-dependent two-sex models : a new approach to sex ratio evolution with multiple maternal conditions
MetadataShow full item record
KeywordAdaptive dynamics; Facultative sex ratios; Maternal condition; Matrix population models; Sex ratio evolution; Trivers-Willard hypothesis
Mothers that experience different individual or environmental conditions may produce different proportions of male to female offspring. The Trivers-Willard hypothesis, for instance, suggests that mothers with different qualities (size, health, etc.) will use different sex ratios if maternal quality differentially affects sex-specific reproductive success. Condition-dependent, or facultative, sex ratio strategies like these allow multiple sex ratios to coexist within a population. They also create complex population structure due to the presence of multiple maternal conditions. As a result, modeling facultative sex ratio evolution requires not only sex ratio strategies with multiple components, but also two-sex population models with explicit stage structure. To this end, we combine nonlinear, frequency-dependent matrix models and multidimensional adaptive dynamics to create a new framework for studying sex ratio evolution. We illustrate the applications of this framework with two case studies where the sex ratios depend one of two possible maternal conditions (age or quality). In these cases, we identify evolutionarily singular sex ratio strategies, find instances where one maternal condition produces exclusively male or female offspring, and show that sex ratio biases depend on the relative reproductive value ratios for each sex.
© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Ecology and Evolution 6 (2016): 6855–6879, doi:10.1002/ece3.2202.
Suggested CitationArticle: Shyu, Esther, Caswell, Hal, "Frequency-dependent two-sex models : a new approach to sex ratio evolution with multiple maternal conditions", Ecology and Evolution 6 (2016): 6855–6879, DOI:10.1002/ece3.2202, https://hdl.handle.net/1912/8536
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Shyu, Esther; Caswell, Hal (John Wiley & Sons, 2016-02-09)The evolution of the primary sex ratio, the proportion of male births in an individual's offspring production strategy, is a frequency-dependent process that selects against the more common sex. Because reproduction is ...
Udovydchenkov, Ilya A.; Duda, Timothy F.; Doney, Scott C.; Lima, Ivan D. (Acoustical Society of America, 2010-08-19)Possible future changes of ambient shipping noise at 0.1–1 kHz in the North Pacific caused by changing seawater chemistry conditions are analyzed with a simplified propagation model. Probable decreases of pH would cause ...
Response of a climate model to tidal mixing parameterization under present day and last glacial maximum conditions Montenegro, Álvaro; Eby, Michael; Weaver, Andrew J.; Jayne, Steven R. (2007-06-27)Experiments with a climate model were conducted under present day and last glacial maximum conditions in order to examine the model’s response to a vertical mixing scheme based on internal tide energy dissipation. The ...