a study was conducted to determine the copper status of different classes of grazing sheep during twodifferent seasons on a farm located in southern punjab, pakistan. a complete free-choice supplement wasavailable to all animals throughout the year. soil, forage and blood plasma from animals were taken eighttimes during the year (2005) (four times in both summer and winter seasons). soil cu2+ w...

In the present study, water samples from 3 stations of Kor river, Iran were analyzed for seasonal fluctuation of physico-chemical parameters, i.e. air and water temperature, dissolved oxygen, BOD, COD, total nitrogen, total hardness, pH, alkalinity, acidity, total dissolved solid and water current. Effect of physico-chemical parameters on surface water density of rotifers was also studied. Duri...

Human populations are not static or uniformly distributed across space and time. This consideration has a notable impact on natural hazard analyses which seek to determine population exposure and risk. This paper focuses on the coupling of population and environmental models to address the effect of seasonally varying populations on exposure to flood risk. A spatiotemporal population modelling ...

The present communication deals with the distribution and population fluctuation of Indoplanorbis exustus under the impact of variant abiotic factors in Doon Valley, Uttarakhand. Further the study also revealed the effects of some physico-chemical parameters, like pH, water temperature, dissolved oxygen, free carbon dioxide on the occurrence and abundance of snail Indoplanorbis exustus in the v...

BACKGROUND In bipolar disorder (BD), seasonality of symptoms is common and disturbances in circadian rhythms have been reported. OBJECTIVES We identified high-penetrance families in a geographically restricted area in Northern Fennoscandia and studied the seasonal variation of clinical symptoms among BD subjects and their healthy relatives. DESIGN We explored the clinical characteristics of...

BACKGROUND/AIM 25-Hydroxyvitamin D (25(OH)D) levels are suggested to influence the susceptibility and risk of disease progression in multiple sclerosis (MS). Seasonal fluctuation of 25(OH)D levels may differ in magnitude between individuals. The purpose of this paper was to model the seasonal fluctuation of vitamin D in Norwegian MS patients and to examine to which extent one single 25(OH)D mea...

the diamondback moth, plutella xylostella (linnaeus, 1758) (lep.: plutellidae) is the most destructive insect pest of crucifer plants throughout the world. in order to study its seasonal population fluctuation, sampling was conducted in the cauliflower fields of south of tehran from late may until october 2011. one hectare cauliflower field in the middle of a large field was randomly selected i...

abstract in order to investigate density fluctuation and spatial distribution of the main aphidophagous predators and develop a fixed-precision sequential sampling plan, a weekly sweepnet sampling was conducted at five winter wheat fields in gorgan region in northern iran, during two growing seasons of 2006 and 2007. spatial distribution of the predators was described by fitting data to poisson...