نتایج جستجو برای: Snow Trout
تعداد نتایج: 28240 فیلتر نتایج به سال:
background: the breeding performance is an important parameter to evaluate the breeding success in captive condition. the optimum hormone dose in combination with latency period is desirable for getting best breeding performance in fish. objectives: the objective of the study was to find the spawning latency period in the hormonal induced reproduction of snow trout with two inducers (ovaprim an...
The Snow trout, Schizothorax zarudnyi Nikolskii, 1897 belongs to Cyprinidae family, endemic to Hamoun Lake, Sistan, Iran. Female fish mature at 4 years old, a few at 3 years old, and male fish at 3 years old, and live in the rivers and lagoons of Hamoon (stagnant waters) and spawn in the same place. Natural fish populations have declined during the last several years because of environmental de...
abstract pollution is a world problem with serious consequences. heavy metals are an important group of these contaminants and enter aquatic ecosystems from anthropogenic and natural sources and animal health and systems are affected. in this study, the effect of lead exposure (3 mg/l concentration, 30 days) on activity of tissue enzymes, including acetyl cholinesterase, alanine aminotransferas...
This study aimed at determining blood biochemical parameters with potential diagnostic value to assess the nutritional status for healthy Snow trout, Schizothorax zarudnyi. For this purpose, three treatment groups of Snow trout (average weight, 65.9±5.3 g) were kept unfed for 24 h, 7 and 14 days. During the experiment, a natural photoperiod was adopted, water temperature was maintained at 23.2±...
assiganga stream is an important tributary of bhagirathi river in central himalaya (india). the stream is characterized by heterogeneity in habitat and substratum features harboring diverse fish fauna. at present this stream is facing threat of being fragmented by the construction of two hydro-electric projects. present study aimed to study fish diversity and their habitat use in assiganga stre...
Background: The breeding performance is an important parameter to evaluate the breeding success in captive condition. The optimum hormone dose in combination with latency period is desirable for getting best breeding performance in fish. Objectives: <span style="color: win...
background: snow trout (schizothorax pelzami) is an economically important species endemic in the north east of iran. objectives: the purpose of the present study was to investigate the reproduction cycle, time and temperature range of spawning. methods: the biometry of 243 fishes was measured and the ovarian development stages and plasma sex steroid hormones (testosterone, 17b- estradiol, pro...
Nowadays, the entrance of pollutants including heavy metals in environment threatens the life of aquatic animals. In this study, the effect of zinc chloride (6 mg/l) and cadmium chloride (5 mg/l) exposure were studied on the activity of some metabolic enzymes in the liver, gills, brain and muscle in Snow trout (Schizothorax zarudnyi). The results showed that zinc caused a significant increase i...
In this study in order to monitor snow cover, the Moderate Resolution Imaging Spectroradiometer (MODIS) optical images were used, while for detection of snow covered areas, the snow index-NDSI, was applied. The results showed - according to the climatic conditions of the region- during the following months: December, January, February and March, most of the area is covered by snow and the max...
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