Effects of parental care on resource allocation into immune defense and buccal microbiota in mouthbrooding cichlid fishes.

Keller, Isabel S., Bayer, Till , Salzburger, Walter and Roth, Olivia (2018) Effects of parental care on resource allocation into immune defense and buccal microbiota in mouthbrooding cichlid fishes. Evolution, 72 (5). pp. 1109-1123. DOI 10.1111/evo.13452.

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Abstract

Sexual dimorphism is founded upon a resource allocation trade-off between investments in reproduction versus other life-history traits including the immune system. In species with conventional parental care roles, theory predicts that males maximize their lifetime reproductive success by allocating resources toward sexual selection, while females achieve this through prolonging their lifespan. Here, we examine the interrelation between sexual dimorphism and parental care strategies in closely related maternal and biparental mouthbrooding cichlid fishes from East African Lake Tanganyika. We measured cellular immune parameters, examined the relative expression of 28 immune system and life history-related candidate genes and analyzed the microbiota composition in the buccal cavity. According to our predictions, maternal mouthbrooders are more sexually dimorphic in immune parameters than biparental mouthbrooders, which has possibly arisen through a differential resource allocation into parental care versus secondary sexual traits. Biparental mouthbrooders, on the other hand, which share the costs of parental care, feature an upregulated adaptive immune response and stronger antiviral properties, while their inflammation response is reduced. Overall, our results suggest a differential resource allocation trade-off between the two modes of parental investment.

Document Type: Article
Keywords: Buccal microbiota, cichlids, mouthbrooding, parental investment, sexual dimorphism, sexual immune dimorphism
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1111/evo.13452
ISSN: 0014-3820
Date Deposited: 13 Mar 2018 10:08
Last Modified: 01 Feb 2019 15:03
URI: http://oceanrep.geomar.de/id/eprint/42231

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