University of Sindh Jamshoro Barcodes Grasshoppers in Pakistan’s Thar DesertTracking the shift of non-pests to crop pests, a phenomenon accelerated by anthropogenic pressures in the Thar Desert.
Cattle grazing in the Thar region.
Photo credit: Ahmed Ali Samejo
Around 20,000 orthopterans have been described in the world including 1,750 from India, but the number of known species in Pakistan is merely 161. Our recent surveys of the Thar region have revealed 29 species of grasshoppers that are new to the country indicating the rich grasshopper diversity of this desert.
With expanding agricultural fields, overgrazing and desertification, and changing ecological conditions, biodiversity is also changing. These changes are pushing non-pests to become crop pests, a phenomenon that warrants further investigation using reliable identification methods. An effective, preventive management strategy of these pests relies on an improved knowledge of their biology and ecology, and on more efficient monitoring and control techniques. The Department of Zoology at the University of Sindh Jamshoro has taken initiative to document and understand the grasshopper fauna in the Thar Desert by coupling DNA barcoding with conventional taxonomy.
Field surveys in the Thar Desert with Kumar, Riffat, & Samejo (left to right).
PHOTO CREDIT: Ahmed Ali Samejo
With funding support from the Higher Education Commission (HEC) Pakistan, the department plans to develop a DNA barcode reference library for grasshoppers in the Thar Desert of Pakistan. Grasshopper collection and specimen identification is already in progress and, so far, 2,334 specimens have been identified to 22 species while the identity of 300 specimens is yet to be resolved. After the front-end processing (data-basing, imaging, tissue sampling) at the University of Sindh Jamshoro is complete, the identified specimens will be barcoded at the Centre for Biodiversity Genomics, University of Guelph.
This is the first effort towards understanding grasshopper diversity in the Thar using DNA methods and developing a reliable reference library for this important group of pest insects. The generated data will not only be used for the rapid identification of grasshoppers and locusts, it will also provide a useful tool for pest management and biodiversity conservation.
Department of Zoology, University of Sindh Jamshoro, Pakistan
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