Temporo-spatial distribution of ground dwelling spider genera among fodder crops at Okara district, Pakistan

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Research Paper 01/04/2016
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Temporo-spatial distribution of ground dwelling spider genera among fodder crops at Okara district, Pakistan

Munaza Shabnam, Muhammad Arshad Rana, Naureen Rana, Sobia Kanwal, Shamsa Altaf, Marriam Batool
J. Bio. Env. Sci.8( 4), 80-90, April 2016.
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The present study was designed to record the temporo-spatial distribution of ground dwelling spider genera among fodder crops at Okara district. Sampling was made from berseem and mustard crops on fortnight basis through pitfall traps. Equal number of traps were placed in three rows e.g. along the boundary, middle of the field and centre of the field. Each trap was filled with mixture solution of alcohol and glycerin (70:30%) along with few drops of kerosene oil. After 5 days interval sample traps collected and spider specimen were washed with distilled water and permanently stored in labeled glass vials. Each spider specimen was identified according to the taxonomic material and internet source. Overall maximum spatial distribution of spider population was documented in middle transect than boundary and centre of the fodder crops. It was observed that temperature, humidity and prey availability were the major factors effecting the spider’s population. Population variations recorded during the months of February, March and April in 2015, due to rise of temperature, decrease of humidity and availability of prey. It was concluded that spiders have direct correlation with temperature and suitable local conditions. Moreover, spiders are cost effective, functionally significant and play a key role in regulating decomposer population.


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