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  4. Maternal allocation of carotenoids increases tolerance to bacterial infection in brown trout
 
research article

Maternal allocation of carotenoids increases tolerance to bacterial infection in brown trout

Wilkins, Laetitia G. E.
•
Da Cunha, Lucas Marques
•
Menin, Laure  
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2017
Oecologia

Life-history theory predicts that iteroparous females allocate their resources differently among different breeding seasons depending on their residual reproductive value. In iteroparous salmonids there is typically much variation in egg size, egg number, and in the compounds that females allocate to their clutch. These compounds include various carotenoids whose functions are not sufficiently understood yet. We sampled 37 female and 35 male brown trout from natural streams, collected their gametes for in vitro fertilizations, experimentally produced 185 families in 7 full-factorial breeding blocks, raised the developing embryos singly (n = 2960), and either sham-treated or infected them with Pseudomonas fluorescens. We used female redness (as a measure of carotenoids stored in the skin) and their allocation of carotenoids to clutches to infer maternal strategies. Astaxanthin contents largely determined egg colour. Neither egg weight nor female size was correlated with the content of this carotenoid. However, astaxanthin content was positively correlated with larval growth and with tolerance against P. fluorescens. There was a negative correlation between female skin redness and the carotenoid content of their eggs. Although higher astaxanthin contents in the eggs were associated with an improvement of early fitness-related traits, some females appeared not to maximally support their current offspring as revealed by the negative correlation between female red skin colouration and egg carotenoid content. This correlation was not explained by female size and supports the prediction of a maternal trade-off between current and future reproduction.

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Type
research article
DOI
10.1007/s00442-017-3952-y
Web of Science ID

WOS:000413691100004

Author(s)
Wilkins, Laetitia G. E.
Da Cunha, Lucas Marques
Menin, Laure  
Ortiz, Daniel  
Vocat-Mottier, Veronique
Hobil, Matay
Nusbaumer, David
Wedekind, Claus
Date Issued

2017

Publisher

Springer

Published in
Oecologia
Volume

185

Issue

3

Start page

351

End page

363

Subjects

Tolerance to infection

•

Bacterial infection

•

Pseudomonas fluorescens

•

Salmonidae

•

Astaxanthin

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
ISIC-GE  
Available on Infoscience
November 8, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/141920
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