| 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
|
| Resource |
| Medaka |
Kiyosu (WS1177) |
