Female aggression towards same-sex rivals depends on context in a tropical songbird

Jones, John Anthony; Boersma, Jordan; Karubian, Jordan

doi:10.1016/j.beproc.2022.104735

Cited by 3 publications

(3 citation statements)

References 69 publications

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“…Similar findings have been recorded in Anolis lizards, where the signalling repertoire was similar between the sexes; however, they differed in their use (Jenssen et al, 2000;Harrison & Poe, 2012;Driessens et al, 2014Driessens et al, , 2015. This variation in the use of signals might indicate either a difference in the costs and benefits associated with signalling (T. Clutton-Brock, 2007;Cain & Ketterson, 2013) or the use of these signals in specific contexts (Peters et al, 2016;Jones et al, 2022).…”

Section: Sex Difference In Signalling Behavioursupporting

confidence: 81%

Decoding the Dewlap: Multiple signals in females and males of a gliding lizard

Sharma,

Sridharan,

Isvaran

2024

Preprint

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Social interactions across taxa are often mediated through multiple signals. Studies examining the maintenance of multiple signals are mostly focused on males and often fail to capture female signalling diversity and strategies. In the recent decade, there has been a surge in the documentation of female signalling, however, our understanding of the functional relevance of multiple signals in females still lags behind. In this study, we examined multiple signals in females of an arboreal gliding lizard,Draco dussumieri, and compared them to those in males. We specifically tested the relative role of the backup signal and the multiple receiver hypotheses in the maintenance of multiple signals in both sexes. FemaleD.dussumieriused a variety of signals to socially interact with conspecifics, especially using their dewlap. The signalling repertoire of females was as diverse as that of males, although the relative use of the signals varied. In females, a few signals seem to be maintained by the backup signal hypothesis, with limited support for the multiple receiver hypothesis as well. For males too, both mechanisms appeared to maintain multiple signals. Interestingly, for some signals, the sexes differed in the context in which they used a given signal. Overall, these findings highlight the functional role of multiple signals in females, which can differ from that observed in males. Therefore, traits conventionally considered male-exclusive when also examined in females can provide finer insights into trait function and evolution.

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Section: Sex Difference In Signalling Behavioursupporting

confidence: 81%

Decoding the Dewlap: Multiple signals in females and males of a gliding lizard

Sharma,

Sridharan,

Isvaran

2024

Preprint

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“…We summarized XYZ coordinates with a separate principal components analysis (PCA) per plumage region per species using a covariance matrix ( sensu Jones et al 2022). All PCAs resulted in one component (hereafter: PC1 chroma ) that explained >92% of the variation (Table 1).…”

Section: Methodsmentioning

confidence: 99%

“…Finally, we tested if male phenotype was related to their own aggression scores in red-backed fairywrens, although we were unable to in white-shouldered fairywrens as to not interfere with a concurrent behavioral study (Jones, Boersma, and Karubian 2022; Jones, Boersma, Liu, et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Impacts of mate quality on female intrasexual aggression in two sisterMalurusfairywren species

Jones,

Feeney,

Jones

et al. 2023

Preprint

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While the impacts of male phenotypic quality on female mating decisions are well-studied, less is known about how male attributes may influence female aggressive behavior. To address this, we evaluated the degree to which females mated to more attractive males may behave more aggressively toward simulated female rivals, as might be predicted if intrasexual competition exists over access to mates. We studied two sister taxa of fairywren (Maluridae) with distinct life-history strategies: white-shouldered fairywrens (Malurus alboscapulatus moretoni) in Papua New Guinea, a species with year-round territoriality and female-limited plumage polymorphisms, and red-backed fairywrens (M. melanocephalus melanocephalus) in temperate Australia, a species with seasonal breeding and one in which females do not exhibit any plumage ornamentation. We characterized male quality by assessing the plumage coloration alongside three morphological characteristics that are known to be important in Malurus fairywrens: body mass, cloacal protuberance volume, and tail length. We quantified female aggression using mirror image stimulations, finding that female white-shouldered fairywrens were more aggressive on average than female red-backed fairywrens. There was a non-significant tendency for more aggressive white-shouldered fairywren females to have heavier mates with longer tails, but male phenotype did not predict female behavior in the red-backed fairywrens. Overall, our results are consistent with the idea that variation in mating system and life-history help shape female aggressive behaviors between divergent species. In socially monogamous species that form long, multiyear bonds with their mates, phenotypic quality may not be the best predictor of mate choice as has historically been emphasized.

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Aggressive behavior as a predictor of home range size: findings from both range-restricted and widespread Darwin’s finch species

García-Loor,

Gallego-Abenza,

Katsis

et al. 2024

J Ornithol

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Information about an animal’s home range (the geographical area in which it accesses resources for survival and reproduction) is vital broadly for understanding animal behavior and specifically for developing conservation management plans. Although personality traits—consistent individual differences in behavior across time and contexts—may affect an animal’s home range size, we still lack a breadth of empirical studies across systems to fully appreciate this influence. Here, we tested the relationship between behavioral responses and home range size in two Darwin’s finch species on Floreana Island: the critically endangered and range-restricted Medium Tree Finch (Camarhynchus pauper) and the common and widespread Small Ground Finch (Geospiza fuliginosa). Using a combination of rapid-assessment assays during both short-term captivity and in the field, we measured exploration and aggressiveness in males from both species. We then used radio telemetry to measure each bird’s home range size over a week-long period. We predicted that (1) fast-exploring individuals would have larger home ranges, and (2) more aggressive individuals would have smaller home ranges. We found that Medium Tree Finches had smaller home ranges than Small Ground Finches, that exploratory behavior was positively correlated with home range size only in Small Ground Finches, and that, in both species, individuals’ aggressiveness was negatively correlated with home range size, whereby the more aggressive individuals occupied smaller home ranges. We conclude that behavioral responses that align with major personality traits can predict home range size, which may provide an important tool for the conservation and management of endangered species when, for example, selecting individuals with different personality profiles for reintroduction.

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Female aggression towards same-sex rivals depends on context in a tropical songbird

Cited by 3 publications

References 69 publications

Decoding the Dewlap: Multiple signals in females and males of a gliding lizard

Decoding the Dewlap: Multiple signals in females and males of a gliding lizard

Impacts of mate quality on female intrasexual aggression in two sisterMalurusfairywren species

Aggressive behavior as a predictor of home range size: findings from both range-restricted and widespread Darwin’s finch species

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