Species richness and spatial diversity of spiders among fodder crops
By: Muhammad Arshad Rana, Munaza Shabnam, Naureen Rana, Tayyba Sultana, Salma Sultana, Sobia Kanwal, Marriam Batool
Key Words: Spatial, Transect, Pitfall, Humidity, Species.
J. Bio. Env. Sci. 8(3), 168-178, March 2016.
The present study was designed to record species richness and spatial diversity of spiders among fodder crops at Okara district. Sampling was made from berseem and mustard crops 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 specimens 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. Maximum spatial distribution of spider species was documented in middle transect than boundary and centre of the fodder crops. Population variations were 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 spider species have direct correlation with temperature and suitable local conditions. Moreover, spiders are cost effective, functionally significant and play a key role in insect pest management.