The Assessment of Morphometric Variation of Aedes aeg ypti Lar vae with the Seasonal Environment Temperature Inversion in Selected Areas of Lahore, Pakistan | [Punjab University Journal of Zoology • 2023]

Author(s):

1. Muhammad Ahsan Riaz: Department of Environmental Sciences and Engineering, Government College University Faisalabad, Pakistan.

2. Ayesha Riaz: Department of Zoology, Government College Women University Faisalabad, Pakistan.

3. Muhammad Asif Mahmood: Department of Medical Entomology and Parasitology, Institute of Public Health, Lahore, Pakistan.

4. Muhammad Uzair Mukhtar: Department of Medical Entomology and Parasitology, Institute of Public Health, Lahore, Pakistan.

5. Zaib Un Nisa: Department of Environmental Sciences and Engineering, Government College University Faisalabad, Pakistan.

6. Beenish Ijaz: Sustainable Development Study Centre, Government College University Lahore, Pakistan.

7. Muhammad Shahid Rasool: Department of Environment Sciences, National College of Business Administration and Economics, Lahore, Pakistan.

Abstract:

Temperature is one of the critical abiotic environmental factors that can influence biological and physiological processes, including mobility, development, and reproduction in poikilotherms. Due to the medical importance of Aedes aegypti as a vector of several medically important pathogens, evaluating the body length variation of Aedes aegypti larvae with the changing seasonal temperature is important. The study was conducted to observe the diference in body size and diferent body structures of Ae. aegypti larvae in two seasons, i.e., southwest monsoon ( June through September) and retreating monsoon (October and November). The fourth instar larvae were collected from areas of district Lahore. The collected larvae were preserved in formalin and transported to the laboratory of the Department of Environmental Science and Engineering at the Government College University Faisalabad for further analysis. The larval morphological measurements were carried out using a stereomicroscope, which included changes in head length and width, thoracic length and width, abdominal length and width, and total length of the larva. Every month, the fourth instar larvae (n=36) were investigated for body size measurement. The results showed that low temperatures of breeding water significantly increase (P=0.05) the body size, head, thorax and abdomen of larvae. The results convinced that temperature inversion afects the immature development stages of Ae. aegypti. This study concluded that, Ae. aegypti larvae's body size depends upon seasonal temperature inversion in the breeding water. These findings can help in predicting the variation in the development rate of Ae. aegypti larvae under diferent seasonal temperatures.

Page(s): 37-41

DOI: 10.17582/journal.pujz/2023/38.1.37.41

Published: Journal: Punjab University Journal of Zoology, Volume: 38, Issue: 1, Year: 2023

Keywords:

Aedes aegypti , dengue vector , Larval body length , Seasonal temperature , Fourthinstar larvae

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