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Dominance status and sex influence nutritional state and immunity in burying beetles Nicrophorus orbicollis

Title data

Steiger, Sandra ; Gershman, Susan N. ; Pettinger, Adam M. ; Eggert, Anne-Katrin ; Sakaluk, Scott K.:
Dominance status and sex influence nutritional state and immunity in burying beetles Nicrophorus orbicollis.
In: Behavioral Ecology. Vol. 23 (2012) Issue 5 . - pp. 1126-1132.
ISSN 1465-7279
DOI: https://doi.org/10.1093/beheco/ars082

Abstract in another language

Intrasexual competition for mates or resources important for reproduction often leads to the establishment of dominance relationships that influence an individual’s reproductive success. Although dominance can be an honest indicator of health or immunocompetence, the attainment and maintenance of dominance status can also influence an individual’s ability to invest in immunity, making it difficult to disentangle cause and effect. Here we examine the relationship between intrasexual competition and the nutritional condition and immunity of burying beetles, Nicrophorus orbicollis, insects that reproduce on small vertebrate carcasses that serve as a larval food source. We staged intrasexual contests on carcasses in both sexes and compared the nutritional state and immunity of dominant and subordinate individuals with those of beetles reproducing on a carcass without competitors. The nutritional state and immunity of dominant beetles were not significantly different from beetles without competitors, but subordinates were characterized by a lower weight gain and reduced encapsulation response. In addition, we found a clear sex effect, with females gaining more weight than males and having superior immunity. We conclude that the subordinate’s exclusion from the carcass plays an important role in mediating the difference in encapsulation. Our data suggest that this is not entirely a nutritional effect because better-fed subordinates did not exhibit higher immune responses. Rather, subordinates may have no need to invest in improved immunity because they do not participate in carcass maintenance and defense.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER147327
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Animal Ecology II - Evolutionary Animal Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Animal Ecology II - Evolutionary Animal Ecology > Chair Animal Ecology II - Evolutionary Animal Ecology - Univ.-Prof. Dr. Sandra Steiger
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: No
DDC Subjects: 500 Science
Date Deposited: 15 Apr 2019 06:49
Last Modified: 15 Apr 2019 06:49
URI: https://eref.uni-bayreuth.de/id/eprint/48373