Figure 1 - uploaded by Joel Harrison Gayford
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time-scaled molecular phylogeny displaying phylogenetic interrelationships between the taxa included in this study. Branch lengths were obtained from Stein et al. (2018).
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Synopsis
Systematic trends in body size variation exist in a multitude of vertebrate radiations, however their underlying ecological and evolutionary causes remain poorly understood. Rensch's rule describes one such trend—in which the scaling of sexual size dimorphism (SSD) depends on which sex is larger. Where SSD is male-biased, SSD should scale...
Contexts in source publication
Context 1
... pruned, time-calibrated phylogeny from Gayford and Sternes (2024) , based on topology and branch lengths of Stein et al. (2018) was also obtained and used for all phylogenetically-informed analyses. This dataset includes 339 shark species including members of all major radiations ( Fig. 1 ). ...
Context 2
... will not be the case where female-biased SSD is observed (Webb and Freckleton 2007 ;Liao et al. 2015 ). We found no support for the proposed rule in sharks however, with no relationship between SSD intensity and size at birth, and an either no relationship or a positive relationship (ruling out hypoallometry) between body size and SSD intensity ( Fig. 2 ; Table 1 ), the opposite of what would be expected were Rensch's rule valid in this clade ( Abouheif and Fairbairn 1997 ). These findings add to an increasing body of evidence that Rensch's rule may be valid in taxa with male-biased SSD (Abouheif and Fairbairn 1997 ;Fairbairn 1997 ), but is rarely if ever valid in taxa which exhibit ...
