RRC ID 58925
Author Evangelista C, Diaz Pauli B, Vøllestad LA, Edeline E.
Title Stoichiometric consequences of size-selective mortality: An experimental test using the Japanese medaka (Oryzias latipes).
Journal Sci Total Environ
Abstract The determinants of intraspecific stoichiometric variation remain difficult to elucidate due to their multiple origins (e.g. genetic vs. environmental) and potential interactive effects. We evaluated whether two size-selected lines of medaka (Oryzias latipes) with contrasted life-history strategies (small- and large-breeder lines with slow growth and early maturity vs. fast growth and late maturity) differed in their organismal stoichiometry (percentage and ratios of carbon [C], nitrogen [N] and phosphorus [P]) in a mesocosm experiment. We also tested how size-selection interacted with environmental conditions (i.e. two levels of fish density and light intensity), body condition and sex. Results showed that large-breeder fish were significantly N-enriched compared to small-breeders, while the two size-selected lines did not differ in body P composition. Size-selection interacted with density - high density only affected small-breeders leading to decreasing %C and C: N - and with sex - large-breeder females had higher %C and C:N values than large-breeder males. Finally, C:P and N:P ratios increased with body condition due to decreasing %P. Overall, our results show that the ecological consequences of size-selective mortality extend to organismal stoichiometry and may, from there, change nutrient cycling and ecosystem functioning.
Volume 724
Pages 138193
Published 2020-7-1
DOI 10.1016/j.scitotenv.2020.138193
PII S0048-9697(20)31706-X
PMID 32247139
MeSH Animals Carbon Ecosystem Female Male Nitrogen Oryzias* Phosphorus
IF 6.551
Times Cited 0
Medaka Kiyosu (WS1177)