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The expression of pre- and postcopulatory sexually selected traits reflects levels of dietary stress in guppies

Rahman,MM, Turchini,GM, Gasparini,C, Norambuena,F and Evans,JP 2014, The expression of pre- and postcopulatory sexually selected traits reflects levels of dietary stress in guppies, PLoS One, vol. 9, no. 8, pp. 1-12, doi: 10.1371/journal.pone.0105856.

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Title The expression of pre- and postcopulatory sexually selected traits reflects levels of dietary stress in guppies
Author(s) Rahman,MM
Turchini,GMORCID iD for Turchini,GM orcid.org/0000-0003-0694-4283
Gasparini,C
Norambuena,F
Evans,JP
Journal name PLoS One
Volume number 9
Issue number 8
Start page 1
End page 12
Publisher Public Library of Science
Place of publication San Francisco, CA
Publication date 2014-08
ISSN 1932-6203
Keyword(s) Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
POLYUNSATURATED FATTY-ACIDS
BROILER BREEDER MALES
CONDITION-DEPENDENT EXPRESSION
POECILIA-RETICULATA
SEMEN QUALITY
SPERM COMPETITION
LIPID-COMPOSITION
MATING TACTICS
REPRODUCTIVE-PERFORMANCE
INBREEDING DEPRESSION
Summary Environmental and ecological conditions can shape the evolution of life history traits in many animals. Among such factors, food or nutrition availability can play an important evolutionary role in moderating an animal's life history traits, particularly sexually selected traits. Here, we test whether diet quantity and/or composition in the form of omega-3 long chain polyunsaturated fatty acids (here termed 'n3LC') influence the expression of pre- and postcopulatory traits in the guppy (Poecilia reticulata), a livebearing poeciliid fish. We assigned males haphazardly to one of two experimental diets supplemented with n3LC, and each of these diet treatments was further divided into two diet 'quantity' treatments. Our experimental design therefore explored the main and interacting effects of two factors (n3LC content and diet quantity) on the expression of precopulatory (sexual behaviour and sexual ornamentation, including the size, number and spectral properties of colour spots) and postcopulatory (the velocity, viability, number and length of sperm) sexually selected traits. Our study revealed that diet quantity had significant effects on most of the pre- and postcopulatory traits, while n3LC manipulation had a significant effect on sperm traits and in particular on sperm viability. Our analyses also revealed interacting effects of diet quantity and n3LC levels on courtship displays, and the area of orange and iridescent colour spots in the males' colour patterns. We also confirmed that our dietary manipulations of n3LC resulted in the differential uptake of n3LC in body and testes tissues in the different n3LC groups. This study reveals the effects of diet quantity and n3LC on behavioural, ornamental and ejaculate traits in P. reticulata and underscores the likely role that diet plays in maintaining the high variability in these condition-dependent sexual traits.
Language eng
DOI 10.1371/journal.pone.0105856
Field of Research 070499 Fisheries Sciences not elsewhere classified
Socio Economic Objective 830199 Fisheries - Aquaculture not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Public Library of Science
Persistent URL http://hdl.handle.net/10536/DRO/DU:30067969

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.