Planktivorous fish positively select Daphnia bearing advanced embryos
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F20%3A43916427" target="_blank" >RIV/62156489:43210/20:43916427 - isvavai.cz</a>
Alternative codes found
RIV/60077344:_____/20:00538605 RIV/60076658:12310/20:43901129 RIV/00216224:14310/20:00115592
Result on the web
<a href="https://doi.org/10.1071/MF18466" target="_blank" >https://doi.org/10.1071/MF18466</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1071/MF18466" target="_blank" >10.1071/MF18466</a>
Alternative languages
Result language
angličtina
Original language name
Planktivorous fish positively select Daphnia bearing advanced embryos
Original language description
The top-down effect of fish predation on reproduction success of Daphnia females was investigated in an outdoor mesocosm experiment with natural (oligotrophic) food conditions. The planktivorous fish, sunbleak (Leucaspius delineatus, 4.9 individuals m-3) was introduced into a half of mesocosms after the first sampling of zooplankton to compare daphnid life-history traits with and without fish predators. Our results showed selective fish predation on the daphnid females with advanced developmental stages of embryos. The Daphnia populations exposed to fish exhibited a lower proportion of females with advanced embryos over those with earlier embryonal stages. Fish predators obviously were attracted to more visible females bearing larger embryos, with well-developed pigmented eyes. Simultaneously, we found a smaller daphnid body length in the mesocosms with fish than in those that were fishless. However, the daphnid clutch size did not reflect their body-length pattern and, surprisingly, decreased regardless of fish presence or absence since the first sampling day, probably owing to deterioration of food quality (mean seston carbon: phosphorus ratio similar to 238). Nevertheless, this selective elimination of the females with advanced embryos, together with the overall decrease in daphnid fitness, can strengthen the deceleration of its population growth under fish predation.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10617 - Marine biology, freshwater biology, limnology
Result continuities
Project
<a href="/en/project/GA17-09310S" target="_blank" >GA17-09310S: Fishponds as models for exploring plankton diversity and dynamics of hypertrophic shallow lakes</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Marine and Freshwater Research
ISSN
1323-1650
e-ISSN
—
Volume of the periodical
71
Issue of the periodical within the volume
4
Country of publishing house
AU - AUSTRALIA
Number of pages
7
Pages from-to
505-511
UT code for WoS article
000526573200009
EID of the result in the Scopus database
2-s2.0-85072101533