Carotenoid-based coloration is associated with predation risk, competition, and breeding status in female convict cichlids (Amatitlania siquia) under field conditions

Anderson, Caleb; Wong, Stephanie; Fuller, Adam; Zigelsky, Kyle; Earley, Ryan L.

doi:10.1007/s10641-014-0333-9

Cited by 15 publications

(6 citation statements)

References 34 publications

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“…The role of baseline androgens in predicting aggression might depend on reproductive status, which raises the possibility that nesting male cichlids might exhibit quite different behavioral and endocrine responses to the same experimental paradigm as we employed in this study with nonnesting males. Nesting accompanies reproduction in this species and mated pairs vary in their aggression toward conspecifics and heterospecifics depending on breeding status (e.g., Anderson et al., ; Wisenden ’95). The males used in this study did not have the opportunity to establish nesting sites because no structures (e.g., terra cotta pots) were provided.…”

Section: Discussionmentioning

confidence: 99%

Hormonal Responses to Noncontact Aggression in Convict Cichlid Fish

Duque

Wong

et al. 2016

J. Exp. Zool.

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This study explored whether convict cichlid fish mount a hormonal response to aggressive encounters where dominance status remains unresolved. Hormone samples were collected at two time points before an aggressive interaction to obtain confinement-induced and baseline measures, and at one time point following a contest across a clear partition (experimental) or exposure to an opaque partition with an opponent on the opposite side (control). There was no overall significant effect of treatment (control vs. experimental) on hormone release rates but there were trends for cortisol and testosterone (T). A priori linear contrasts showed that individuals that engaged in aggressive interactions had lower postfight cortisol and T release rates than controls, suggesting that aggression, in this context, might attenuate the synthesis of both hormones. Cortisol decreased significantly between initial confinement and baseline, indicating that individuals habituate to the water-borne hormone collection procedure. Contrary to expectation, individuals with higher baseline T and 11-ketotestosterone (KT) release rates took longer to initiate conflict. None of the other measures of behavior were predicted by baseline hormone release rates, and contest behavior did not predict postfight hormone release rates. There was a significant positive relationship between KT and T at all time points. As with studies that employ mirror image stimulation, we found no hormonal response to unresolved contests despite high levels of aggressive behavior. Our study is unique because we demonstrate that animals engaged in conflict with live opponents also do not mount a significant hormonal response when clear dominance relationships are not established.

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Section: Discussionmentioning

confidence: 99%

Hormonal Responses to Noncontact Aggression in Convict Cichlid Fish

Duque

Wong

et al. 2016

J. Exp. Zool.

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“…In particular, the femalespecific orange ventral coloration elicits aggressive behaviours in females but not males (Beeching et al, 1998). In contrast, Anderson et al (2015) found that females had decreased ventrolateral coloration when exposed to a greater risk of predation and agonistic interactions with heterospecifics, but this coloration was unrelated to interactions with conspecifics and mates. Despite evidence of the association of colour traits with aggressiveness or fighting ability, it appears that individuals do not always use this information to avoid potentially costly interactions (Culumber & Monks, 2014;Maan et al, 2001), unless they have access to alternative options, such as hiding or attacking another territory owner.…”

Section: Discussionmentioning

confidence: 91%

“…Similarly, in female convict cichlids, bacteria-challenged fish experienced reduced oxidative stress while simultaneously allocating more carotenoids to the integument, especially when maintained on a diet with trace levels of carotenoids (Brown, 2014). As suggested by Anderson, Wong, Fuller, Zigelsky, and Earley (2015), energy expenditure demanded by a proactive profile may cause reabsorption of carotenoids from the integument, thus reducing the orange coloration in proactive females.…”

Section: Discussionmentioning

confidence: 99%

Coloration reflects behavioural types in the convict cichlid, Amatitlania siquia

Schweitzer

Dechaume-Moncharmont

2015

Animal Behaviour

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“…In the context of coloration patterns in the Heliconia , for example, rare phenotypes often both experience increased predation and also determine assortment [Mallet and Barton, 1989, Kapan, 2001, Langham and Benkman, 2004, Jiggins et al, 1996, Arias et al, 2008]. Likewise, in vertebrates ranging from cichlids [Sefc et al, 2014, Anderson et al, 2015] to finches [Blount, 2004, Blount et al, 2003], carotenoid coloration phenotypes are well known to influence mate choice and viability alike.…”

Section: Introductionmentioning

confidence: 99%

Assortative mating can impede or facilitate fixation of underdominant alleles

Newberry

McCandlish

Plotkin

2016

Theoretical Population Biology

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Underdominant mutations have fixed between divergent species, yet classical models suggest that rare underdominant alleles are purged quickly except in small or subdivided populations. We predict that underdominant alleles that also influence mate choice, such as those affecting coloration patterns visible to mates and predators alike, can fix more readily. We analyze a mechanistic model of positive assortative mating in which individuals have n chances to sample compatible mates. This one-parameter model naturally spans random mating (n =1) and complete assortment (n → ∞), yet it produces sexual selection whose strength depends non-monotonically on n. This sexual selection interacts with viability selection to either inhibit or facilitate fixation. As mating opportunities increase, underdominant alleles fix as frequently as neutral mutations, even though sexual selection and underdominance independently each suppress rare alleles. This mechanism allows underdominant alleles to fix in large populations and illustrates how life history can affect evolutionary change.

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Carotenoid-based coloration is associated with predation risk, competition, and breeding status in female convict cichlids (Amatitlania siquia) under field conditions

Cited by 15 publications

References 34 publications

Hormonal Responses to Noncontact Aggression in Convict Cichlid Fish

Hormonal Responses to Noncontact Aggression in Convict Cichlid Fish

Coloration reflects behavioural types in the convict cichlid, Amatitlania siquia

Assortative mating can impede or facilitate fixation of underdominant alleles

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