animal
Alireza Pesarakloo; Mina Karimi; Raziyeh Alaei
Abstract
Introduction: chemical pollution of water has been introduced as one of the main threats to biological communities. Amphibians have a close relationship with aquatic environments due to their biphasic life cycle, permeable skin and aquatic larvae. the effect of environmental pollutants in some amphibian ...
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Introduction: chemical pollution of water has been introduced as one of the main threats to biological communities. Amphibians have a close relationship with aquatic environments due to their biphasic life cycle, permeable skin and aquatic larvae. the effect of environmental pollutants in some amphibian habitats around Arak and Shazand cities was investigated on egg hatching and survival of green toad larvae Bufotes sitibundus. Materials and methods: the effect of six contaminated water sources and one control source on egg samples was investigated. Physicochemical parameters including PH, TDS, Salt, EC, DO, BOD, COD and elemental analysis using ICP device in water samples and the number of six biological traits such as growth index, physical condition, incubation period of embryo-larval stages, malformation , survival and mortality percentages were investigated in larval samples. Results and discussion: A significant decrease in survival in all containers containing contaminated water compared to the control sample, a decrease in growth in some containers and an increase in growth in one of the breeding containers compared to the water in the control sample, and the occurrence of abnormalities were treated in containers during the larval period. According to the previous researches and the significant results of the current research, the decrease in the survival percentage, the increase in the occurrence of abnormalities, and the difference in the growth percentage in the breeding containers can be attributed to the chemical pollution of the water. COD), attributed the presence of heavy metals and water salinity.
