PMID- 10831335
OWN - NLM
STAT- MEDLINE
DCOM- 20000706
LR  - 20171116
IS  - 0147-6513 (Print)
IS  - 0147-6513 (Linking)
VI  - 46
IP  - 2
DP  - 2000 Jun
TI  - Effects of 2,4-dichlorophenol on the net-spinning behavior of hydropsyche 
      slossonae larvae (Trichoptera; Hydropsychidae), an early warning signal of 
      chronic toxicity.
PG  - 207-17
AB  - In order to assess the potential of hydropsychid capture net anomalies as a 
      bioindicator of chronic toxicity in streams and rivers, the effects of 
      2,4-dichlorophenol (2,4-DCP) exposure on the net-spinning behavior of Hydropsyche 
      slossonae were examined for anomalies after 0, 5, 10, 15, and 20 exposure days to 
      gradient concentration of 2,4-dichlorophenol. The net-spinning behavior was 
      significantly affected when larvae were exposed to 1.0, 10, 25, and 50 microg 
      small middle dotL(-1), as expressed by the occurrence of two distinct 
      abnormalities. The first one was a distortion of the midline meshes, where the 
      normal diamond-shape structure is disrupted and the meshes are separated by extra 
      strands (called "midline anomaly). The second aberration observed was called 
      "chaotic net, where the nets are highly irregular without any real structure or 
      well-defined areas. A good correlation was found between the chaotic net 
      frequencies and the reduction of ATP concentrations in the larvae, indicating 
      possible uncoupling effects of 2,4-DCP on the oxidative phosphorylation process. 
      Toxicity curves demonstrate that the sensitivity threshold of chaotic net 
      frequencies ranged from 3.5 to 7 microg small middle dotL(-1), which is highly 
      sensitive compared with other sublethal effects of 2,4-DCP on other aquatic 
      species.
CI  - Copyright 2000 Academic Press.
FAU - Tessier, L
AU  - Tessier L
AD  - D inverted question markepartement de chimie-biologie, Universit inverted question marke du Qu inverted question markebec  inverted question marka Trois-Rivi inverted question markeres, 
      Trois-Rivi inverted question markeres, Qu inverted question markebec, G9A 5H7, Canada.
FAU - Boisvert, J L
AU  - Boisvert JL
FAU - Vought, L B
AU  - Vought LB
FAU - Lacoursie, J O
AU  - Lacoursie JO
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Netherlands
TA  - Ecotoxicol Environ Saf
JT  - Ecotoxicology and environmental safety
JID - 7805381
RN  - 0 (Chlorophenols)
RN  - 8L70Q75FXE (Adenosine Triphosphate)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - *Abnormalities, Drug-Induced
MH  - Adenosine Triphosphate/analysis
MH  - Animals
MH  - Chlorophenols/*toxicity
MH  - Insecta/*drug effects
MH  - Larva/drug effects
EDAT- 2000/06/01 09:00
MHDA- 2000/07/08 11:00
CRDT- 2000/06/01 09:00
PHST- 2000/06/01 09:00 [pubmed]
PHST- 2000/07/08 11:00 [medline]
PHST- 2000/06/01 09:00 [entrez]
AID - S0147-6513(99)91897-3 [pii]
AID - 10.1006/eesa.1999.1897 [doi]
PST - ppublish
SO  - Ecotoxicol Environ Saf. 2000 Jun;46(2):207-17. doi: 10.1006/eesa.1999.1897.