ISSN:0323-4320    

DOI:10.1002/aheh.19890170112

出版商:WILEY‐VCH Verlag GmbH    

年代:1989

数据来源: WILEY

摘要:

AbstractExperiments were carried out on the toxicity of diluted dyeing and printing industry effluent to a penaeid prawn,Parapenaeopsis sculptilis(Heller). Effluent tolerance experiments showed that both juvenile and adult prawns were unable to withstand the increasing concentration of the effluent. Juveniles were more susceptible to effluent than adults. As a consequence of higher consumption of energy due to the disturbed metabolism a decrease in the metabolite content was observed, whereas the content of ions showed an irregular trend with all the concentrations. The behavioural study showed that before death both juvenile and adult prawns became inactive, followed by paralysis. The physico‐chemical nature of the effluent showed high amounts of solids, BOD, COD, sodium, magnesium, calcium, chloride, ammonium nitrogen, sulphate and absence of DO, probably causing an osmotic imbalance in the prawn body which leads to early mortality. Even a 1% concentration of such an effluent of a physico‐chemical nature was reported to be toxic to the pra

ISSN:0323-4320    

DOI:10.1002/aheh.19890170113

出版商:WILEY‐VCH Verlag GmbH    

年代:1989

数据来源: WILEY

ISSN:0323-4320    

DOI:10.1002/aheh.19890170114

出版商:WILEY‐VCH Verlag GmbH    

年代:1989

数据来源: WILEY

摘要:

AbstractThe effect of crude oil on the histochemical localization of branchial enzymes CA, SDH, LDH, Alkpase and Acidpase was investigated inColisa fasciatus.The activity of all the enzymes experimented here was found to have decreased when treated with the lethal solutions of crude oil except the LDH which showed an increasing trend throughout the experiment. A transitory increase in the CA and SDH was observed in the beginning but reached an almost normal level after 48 h in 1000 ppm. On the basis of sensitiveness towards crude oil toxicity, the enzymes have been arranged in the following order: LDH>SDH>CA>Alkpase>Acidpase.The results suggest that crude oil is capable of impairing the enzyme activity. The decreased or increased level of enzymes may be used as an indicator for assessing the toxicity of oil pollutants.

ISSN:0323-4320    

DOI:10.1002/aheh.19890170115

出版商:WILEY‐VCH Verlag GmbH    

年代:1989

数据来源: WILEY

摘要:

AbstractFreshwater fishCyprinus carpiohave been exposed to sublethal concentrations of fenvalerate (0.010 ppm) and cypermethrin (0.020 ppm) for 6, 12, 24 and 48 hours. After each exposure period, certain blood parameters were studied. A decrease in red blood corpuscular (RBC) count, haemoglobin (Hb) concentration, packed cell volume (PCV) and mean corpuscular haemoglobin concentration (MCHC), on the one hand, and an increase in mean corpuscular volume (MCV) and mean corpuscular haemoglobin (MCH), on the other hand, have been observed with increasing time of exposure. The alterations observed may be due to the physiological disfunctioning of the haemopoietic tissue or may be due to the effect on the bone marrow. The effect of fenvalerate is more pronounced than that of cypermethrin.

ISSN:0323-4320    

DOI:10.1002/aheh.19890170116

出版商:WILEY‐VCH Verlag GmbH    

年代:1989

数据来源: WILEY

ISSN:0323-4320    

DOI:10.1002/aheh.19890170117

出版商:WILEY‐VCH Verlag GmbH    

年代:1989

数据来源: WILEY

ISSN:0323-4320    

DOI:10.1002/aheh.19890170118

出版商:WILEY‐VCH Verlag GmbH    

年代:1989

数据来源: WILEY

ISSN:0323-4320    

DOI:10.1002/aheh.19890170119

出版商:WILEY‐VCH Verlag GmbH    

年代:1989

数据来源: WILEY

ISSN:0323-4320    

DOI:10.1002/aheh.19890170120

出版商:WILEY‐VCH Verlag GmbH    

年代:1989

数据来源: WILEY

ISSN:0323-4320    

DOI:10.1002/aheh.19890170121

出版商:WILEY‐VCH Verlag GmbH    

年代:1989

数据来源: WILEY