Premium
The influence of fish‐exuded chemical signals on the carbon budget of Daphnia
Author(s) -
Stibor Herwig,
MachaCek Jiri
Publication year - 1998
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1998.43.5.0997
Subject(s) - daphnia , cladocera , respiration , biology , juvenile , daphnia magna , facultative , branchiopoda , assimilation (phonology) , fish <actinopterygii> , juvenile fish , ecology , carbon fibers , crustacean , environmental chemistry , fishery , chemistry , botany , toxicity , linguistics , philosophy , materials science , organic chemistry , composite number , composite material
Respiration and carbon assimilation rates were measured in juvenile instars of Daphnia magna cultivated either in fish‐treated or in control medium without fish exudates. Respiration and carbon assimilation rates increase proportionally to Daphnia body size. This relationship did not differ between fish‐influenced and control daphnids throughout juvenile development. The results imply that observed lif‐history shifts in Daphnia exposed to fish exudates are facultative changes and not the result of changes in the carbon budget induced by other predator‐induced defense mechanisms or experimental setups.