Rensch’s Rule Crosses the Line: Convergent Allometry of Sexual Size Dimorphism in Hummingbirds and Flower Mites

@article{Colwell2000RenschsRC,
  title={Rensch’s Rule Crosses the Line: Convergent Allometry of Sexual Size Dimorphism in Hummingbirds and Flower Mites},
  author={Robert K. Colwell},
  journal={The American Naturalist},
  year={2000},
  volume={156},
  pages={495 - 510}
}
Hummingbirds demonstrate the full scope of Rensch’s rule (females larger than males in small species, males larger than females in large species). The phoretic flower mites that hummingbirds compete with for nectar show the same pattern. An analysis of phylogenetically independent contrasts for 154 hummingbird and 37 mite species confirmed that both small (female‐larger) and large (male‐larger) species contribute to this result. I propose a common cause for this convergent pattern of sexual… 
Allometry of Sexual Size Dimorphism in Dioecious Plants: Do Plants Obey Rensch’s Rule?
TLDR
The overall results suggest that selection for larger female stem sizes to support the weight of offspring can give rise to Rensch’s rule in dioecious plants.
Allometry for Sexual Size Dimorphism: Testing Two Hypotheses for Rensch’s Rule in the Water Strider Aquarius remigis
TLDR
The results support a novel interpretation of the differential‐plasticity hypothesis: that the traits most closely associated with reproductive fitness are “adaptively canalized” among populations of the water strider Aquarius remigis.
Sexual selection explains sex-specific growth plasticity and positive allometry for sexual size dimorphism in a reef fish
TLDR
It is shown that in the sex-changing fish Parapercis cylindrica, larger males have larger harems with larger females, and that SSD increases with harem size, suggesting that sexual selection for male body size is the ultimate cause of sexual size allometry.
Sexual size dimorphism and its allometry in Chinese lizards
TLDR
The findings show that Chinese lizards generally exhibit female-biased sexual size dimorphism, and that strong fecundity selection limits application of Rensch's rule in these groups.
Sexual size dimorphism and sex ratios in dragonflies (Odonata)
TLDR
Support for Rensch's rule is found in dragonflies (Odonata) by analysing body size of 21 species and the slope of the relationship between sex ratio and size ratio was negative, suggesting that the larger sex suffers from high mortality in the larval stage, consistent with riskier foraging.
Patterns of sexual size dimorphism in stingless bees: Testing Rensch’s rule and potential causes in highly eusocial bees (Hymenoptera: Apidae, Meliponini)
TLDR
It is suggested that in highly eusocial taxa, additional selection mechanisms, possibly related to individual and colonial interests, could influence the evolution of environmentally determined traits such as body size.
A test of Rensch’s rule in dwarf chameleons (Bradypodion spp.), a group with female-biased sexual size dimorphism
TLDR
It is shown that the majority of dwarf chameleons (Bradypodion spp.) have female-biased SSD, and in accordance with Rensch’s rule, the group exhibits an allometric slope of log(female size) on log(male size) less than one, although statistical significance is dependent on the phylogenetic comparative method used.
Rensch’s Rule in Large Herbivorous Mammals Derived from Metabolic Scaling
TLDR
The model suggests hypotheses for why some other sexually dimorphic taxa, such as primates and pinnipeds (seals and sea lions), do or do not conform to Rensh’s rule.
Sexual selection, sexual size dimorphism and Rensch’s rule in Odonata
TLDR
The results suggest that sexual selection acting on male sizes influences SSD in Odonata, although this influence is modulated by territorial mating strategy and thus the likely advantage of being large.
Plasticity in sexual size dimorphism and Rensch's rule in Mediterranean blennies (Blenniidae)
TLDR
This study compares SSD among closely related populations of three species of Mediterranean blennies (Blenniidae) and demonstrates the fine scale on which evolutionary processes re- sponsible for Rensch's rule may be operating.
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