The effects of a pesticide on inducible phenotypic plasticity in Daphnia

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Many species of zooplankton can detect chemical signals (kairomones) released by their predators and respond with defensive morphological and life-history changes. Daphnia longicephala were exposed to five different concentrations of the carbamate insecticide, carbaryl, in the presence and absence of kairomones released by Anisops gratus (Hemiptera: Notonectidae). In the absence of Anisops kairomone, there was a negative correlation between carbaryl concentration and length and brood size at maturity. Growth and reproduction were significantly impaired at carbaryl concentrations ≥0.32 μg/litre. There was no effect of carbaryl on age at maturity and it did not induce crest growth in the absence of kairomone. In the presence of kairomone, D. longicephala developed a large crest, but took longer to reach maturity than control animals. A concentration of 3.2 μg/litre carbaryl decreased relative crest size of 3-day-old daphnids but did not affect crest size of adults. The Anisops kairomone dramatically altered the effects of carbaryl on the life-history responses of D. longicephala at maturity. There was a positive correlation between the concentration of carbaryl and age, length, and brood size at maturity. The effects of kairomone on life-history parameters are explained using a size threshold for maturation hypothesis. Copyright (C) 1998 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)217-224
Number of pages8
JournalEnvironmental Pollution
Volume104
Issue number2
DOIs
Publication statusPublished - Feb 1 1999

Fingerprint

Carbaryl
Daphnia
kairomone
Pheromones
phenotypic plasticity
Pesticides
Plasticity
pesticide
Insecticides
Animals
size at maturity
life history
brood size
Zooplankton
age at maturity
Hemiptera
Carbamates
carbamate (ester)
Growth
carbaryl

Keywords

  • Anisops
  • Carbaryl
  • Daphnia longicephala
  • Kairomone
  • Phenotypic plasticity

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Pollution

Cite this

The effects of a pesticide on inducible phenotypic plasticity in Daphnia. / Barry, M. J.

In: Environmental Pollution, Vol. 104, No. 2, 01.02.1999, p. 217-224.

Research output: Contribution to journalArticle

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