Abstract:
:The chronic effect of p-nonylphenol on survival and reproduction for two generations of the freshwater cladoceran Daphnia galeata was examined by life table experiments. The effects on survival and reproduction were used as the intrinsic rate of natural increase, r, with the Euler-Lotka equation and were analyzed with a simple mathematical model (a power function). The population-level EC(50), the concentration of a substance that reduces the intrinsic rate of natural increase by 50%, was estimated as 65.2 microg/L for the first generation and 81.5 microg/L for the second generation. No transgenerational effect that reinforces adverse responses in the offspring generation has been detected. From a 48-h immobility test an acute LC(50) was estimated to be 60.8 microg/L. The acute LC(50) is a good indicator of the chronic population-level effects of this chemical to this species.
journal_name
Environ Toxicoljournal_title
Environmental toxicologyauthors
Tanaka Y,Nakanishi Jdoi
10.1002/tox.10083keywords:
subject
Has Abstractpub_date
2002-10-01 00:00:00pages
487-92issue
5eissn
1520-4081issn
1522-7278journal_volume
17pub_type
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