TY - JOUR
T1 - Effects of 1,2-dichlorobenzene on the growth, bioenergetics and reproduction of the amphipod, Melita longidactyla
AU - Tong, Esther Sze Ping
AU - van de Merwe, Jason Paul
AU - Chiu, Jill Man Ying
AU - Wu, Rudolf Shiu Sun
N1 - Funding Information:
This study was partially supported by a postgraduate studentship awarded to Esther Tong from the City University of Hong Kong.
Publisher copyright:
Copyright © 2010 Published by Elsevier Ltd.
PY - 2010/6
Y1 - 2010/6
N2 - The amphipod Melita longidactyla occurs in great abundance and serves important roles in the trophic transfer and nutrient recycling in marine systems along the Chinese coast. This study investigated the lethal dose (48h LC50), as well as sub-lethal effects of a common xenobiotic, 1,2-dichlorobenzene (1,2-DCB), on the bioenergetics, growth and reproduction of this important species. The 48h LC50 for M. longidactyla exposed to 1,2-DCB was 780μgL-1. Exposure to 20μgL-1 1,2-DCB for 3weeks resulted in 22% reduction in the growth (dry weight) and 57% reduction in the number of progeny, respectively. Furthermore, a significant reduction in RNA:DNA ratio was observed in amphipods exposed to 1,2-DCB at concentration as low as 5μgL-1, whereas significant reductions in scope for growth occurred upon exposure to higher concentrations of 1,2-DCB (10 and 20μgL-1) for 3 and 5weeks. Our results showed that environmentally relevant concentrations of 1,2-DCB can affect the bioenergetics and more importantly, growth and reproduction of M. longidactyla, implicating that 1,2-DCB may affect the recruitment and sustainability of natural populations of this ecologically important species.
AB - The amphipod Melita longidactyla occurs in great abundance and serves important roles in the trophic transfer and nutrient recycling in marine systems along the Chinese coast. This study investigated the lethal dose (48h LC50), as well as sub-lethal effects of a common xenobiotic, 1,2-dichlorobenzene (1,2-DCB), on the bioenergetics, growth and reproduction of this important species. The 48h LC50 for M. longidactyla exposed to 1,2-DCB was 780μgL-1. Exposure to 20μgL-1 1,2-DCB for 3weeks resulted in 22% reduction in the growth (dry weight) and 57% reduction in the number of progeny, respectively. Furthermore, a significant reduction in RNA:DNA ratio was observed in amphipods exposed to 1,2-DCB at concentration as low as 5μgL-1, whereas significant reductions in scope for growth occurred upon exposure to higher concentrations of 1,2-DCB (10 and 20μgL-1) for 3 and 5weeks. Our results showed that environmentally relevant concentrations of 1,2-DCB can affect the bioenergetics and more importantly, growth and reproduction of M. longidactyla, implicating that 1,2-DCB may affect the recruitment and sustainability of natural populations of this ecologically important species.
KW - Amphipods
KW - Bioenergetics
KW - Dichlorobenzene
KW - Growth
KW - Reproduction
UR - http://www.scopus.com/inward/record.url?scp=77952672744&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2010.03.045
DO - 10.1016/j.chemosphere.2010.03.045
M3 - Journal article
C2 - 20416923
AN - SCOPUS:77952672744
SN - 0045-6535
VL - 80
SP - 20
EP - 27
JO - Chemosphere
JF - Chemosphere
IS - 1
ER -
