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When to rely on maternal effects and when on phenotypic plasticity?
University Press Scholarship Online. Sign in. Not registered? Sign up. Publications Pages Publications Pages. In addition to temporal variation in recruitment to the rapid yolk deposition stage, hierarchical arrangements among the simultaneously growing oocytes and ovulation intervals are maintained by growth inhibiting hormonal interactions among maturing oocytes [ 63 — 65 ]. Such inhibiting interactions have pronounced spatial patterns, such that only follicles in the close proximity or at similar stages of development are affected.
Dario Maestripieri and Jill M. Mateo
Thus, differences between oocytes that become males and females in either time of recruitment or in spatial arrangement in the ovary can produce sex-specific groups or "clusters" of oocytes. Such clusters have been inferred through analyses of similarity in oocyte accumulation of lipids, carotenoids, vitamins, and hormones [ 25 , 27 , 50 ]. To assess shape and magnitude of the response e. The Poisson regression analysis of GAM procedure enables simultaneous test of the stimulus, estimation and statistical comparison of the best shape of the relationship between the stimulus and the response, and visual assessment of the value of stimulus corresponding with the full response.
We then recorded the smallest value of the stimulus corresponding to the full response three positions in MT and four in AZ. To compare response to environmental stimulus across all females, breeding episodes, and populations in the single test, we standardized both the response and strength of stimulus variables to percentages of the full response and maximum stimulus three biased positions, and 10 critical temperature days in MT and four biased positions and 55 mites in AZ and tested the interaction between the factors with PROC GLM with the response constrained by female identity.
The cluster analysis of similarity in correlational structure between follicles of different ovulation order and sex was conducted by Ward's minimum distance method using pseudo- F and preudo- t 2 statistics to estimate the number of statistically distinct clusters [after [ 25 ]].
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Maternal Effects as Adaptations. Timothy A. Mousseau , Charles W. Fox
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Entomol Exp Appl. Wang S-Y, Johnson PA: Increase in ovarian a-inhibin gene expression and plasma immunoreactive inhibin level is correlated with adecrease in ovulation rate. Possible extensions to our model include the incorporation of spatial environmental variation. Given our previous results in temporally fluctuating environments e. In a simple spatial model consisting of two different environments and a probability d with which individuals migrate to a different environment , we indeed find that correlations are again important see Fig.