Data from: Significant differences in maternal carotenoid provisioning and effects on offspring fitness in Chinook salmon colour morphs

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Description:
In oviparous species, maternal carotenoid provisioning can deliver diverse fitness benefits to offspring via increased survival, growth, and immune function. Despite demonstrated advantages of carotenoids, large intra‐ and interspecific variation in carotenoid utilization exists, suggesting trade‐offs associated with carotenoids. In Chinook salmon (Oncorhynchus tshawytscha), extreme variation in carotenoid utilization delineates two colour morphs (red and white) that differ genetically in their ability to deposit carotenoids into tissues. Here, we take advantage of this natural variation to examine how large differences in maternal carotenoid provisioning influence offspring fitness. Using a full‐factorial breeding design crossing morphs and common‐garden rearing, we measured differences in a suite of fitness‐related traits, including survival, growth, viral susceptibility, and host response, in offspring of red (carotenoid‐rich eggs) and white (carotenoid‐poor eggs) females. Eggs of red females had significantly higher carotenoid content than those of white females (6X more); however, this did not translate into measurable differences in offspring fitness. Given that white Chinook salmon may have evolved to counteract their maternal carotenoid deficiency, we also examined the relationship between egg carotenoid content and offspring fitness within each morph separately. Egg carotenoids only had a positive effect within the red morph on survival to eyed‐egg (earliest measured trait), but not within the white morph. While previous work shows that white females benefit from reduced egg predation, our study also supports a hypothesis that white Chinook salmon have evolved additional mechanisms to improve egg survival despite low carotenoids, providing novel insight into evolutionary mechanisms that maintain this stable polymorphism.

Usage Notes:

Egg carotenoid content

Egg carotenoid content in ug/g for unfertilized eggs from Chinook salmon females
Carotenoid_content.csv

Relative gene expression data

Relative gene expression data for all fish in control and treatment tanks
All_relative_expression_data.csv

Survival to eyed-egg stage

Data for survival from fertilization to eyed-egg stage. All eggs were counted (dead and alive) to calculate survival for each cell (replicates for each cross). Data were converted to binary data for analyses. A total of 56 families were used in this analysis.
egg survival for binary-56 families.csv

Survival from eyed-egg to fry

Survival from eyed-egg to fry measured by alive and dead offspring. Survival values are provided for each family (n=56). Data were converted to binary format for analyses.
egg to fry data survival-CAER.csv

Early fry survival

Data for early fry survival (from ponding to February). Survival data are provided for each family. Data were transformed to binary format for analyses.
early fry survival -CAER.csv

Late fry survival

Data for late fry survival (February to June). Data are provided for each tank and were transformed to binary format for analyses.
late fry survival-CAER.csv

Weight and length data for fry

Weight (wt) and fork length (FL) data for fry in December, February, April, and July. A total of 15 fish were randomly sampled at each date (not same fish each time). Missing data points within a family indicate that no additional fish were alive in the family at that time point (or after that point).
Ponding_data_Ques2015_caer.csv

IHNV survival challenge

Survival data (dead and alive fish) for IHNV and mock challenge. Survival was measured over 35 days after exposure to the live IHNV virus or exposure to mock conditions.
Auteur(s) :
Lehnert, Sarah J.

Lehnert, Sarah J.

University of Windsor
, Garver, Kyle A.

Garver, Kyle A.

Fisheries and Oceans Canada
, Richard, Jon

Richard, Jon

Fisheries and Oceans Canada
, Devlin, Robert H.

Devlin, Robert H.

Fisheries and Oceans Canada
, Lajoie, Celine

Lajoie, Celine

University of Windsor
, Pitcher, Trevor E.

Pitcher, Trevor E.

University of Windsor
et Heath, Daniel D.

Heath, Daniel D.

University of Windsor
Dépôt source:
Dryad
Éditeur(s):
Dryad
Accès:
Public
URL:
http://datadryad.org/stash/dataset/doi:10.5061/dryad.33m546g
Date de publication:
2018-10-02
Mots-clés (en):
Oncorhynchus tshawytscha, genetic polymorphisms, infectious hematopoietic necrosis virus, et carotenoid pigmentation
Identificateur:
https://doi.org/10.5061/dryad.33m546g

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Citation selon les normes APA:
Data from: Significant differences in maternal carotenoid provisioning and effects on offspring fitness in Chinook salmon colour morphs. (2018). [Data set]. Dryad. http://datadryad.org/stash/dataset/doi:10.5061/dryad.33m546g
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