Journal of Environmental Biology

Effect of butyl benzyl phthalate on life table-demography of two successive generations of cladoceran Moina macrocopa Straus

Author Details

Jin-Xia Wang

Provincial Key Laboratories of Conservation and Utilization for Important Biological Resource in Anhui and Biotic Environment and Ecological Safety, College of Life Sciences, Anhui Normal University, Wuhu, Anhui 241000, China

Yi-Long Xi

(Corresponding author)

Provincial Key Laboratories of Conservation and Utilization for Important Biological Resource in Anhui

and Biotic Environment and Ecological? Safety, College of Life Sciences, Anhui Normal University,

Wuhu, Anhui 241000, China

e-mail: ylxi1965@yahoo.com.cn

Ke Hu

Provincial Key Laboratories of Conservation and Utilization for Important Biological Resource in Anhui and Biotic Environment and Ecological Safety, College of Life Sciences, Anhui Normal University, Wuhu, Anhui 241000, China

Xiao-Bo Liu

Provincial Key Laboratories of Conservation and Utilization for Important Biological Resource in Anhui and Biotic Environment and Ecological Safety, College of Life Sciences, Anhui Normal University, Wuhu, Anhui 241000, China

Publication Data

Paper received:

21 July 2009

Revised received:

27 April 2010

Accepted:

11 May 2010

Abstract

In this study, the acute toxicity of butyl benzyl phthalate (BBP) to freshwater cladoceran Moina macrocopa was tested, and its chronic effects on survival and reproduction of two successive generations of the cladoceran were studied using life-table demographic method. The results showed that the 48-hr LC₅₀ of BBP for M. macrocopa was 3.69 mg l^-1. Compared to the blank controls, BBP at 125, 500, 1000 and 2000 ?g l^-1 significantly shortened the life expectancy at birth, BBP at 125-2000 ?g l^-1 decreased the net reproductive rate, and BBP at 500 and 1000 ?g l^-1 shortened the generation time but increased the intrinsic rate of population increase of the parental M. macrocopa. BBP at 62.5, 125, 500, 1000 and 2000 ?g l^-1 increased the intrinsic rate of population increase of the F₁ generation. A significant dose-effect relationship existed between BBP concentration and life expectancy at birth, net reproductive rate as well as intrinsic rate of population increase of the parental M. macrocopa. The parental M. macrocopa were more sensitive in survival, development and reproduction to BBP than the F₁ generation, but the reverse was also true in the population growth. Extending chronic toxicity tests to the second generation of M. macrocopa increased the cost-effectiveness of the assays.

Key words

Cladocerans, Butyl benzyl phthalate, Acute toxicity, Life-table demography

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