PAGDAND

Vishwamitri River, Vadodara Crocodile Count 2019

  • Day time ground survey method: The urban stretch of river (22°19 N 73°13 E; Dena village to Talsat village) was arbitrarily divided into 7 zones. Lalbaug and other water bodies with crocodile population formed the 8th zone. After familiarizing the participants with the habitat during the training session, the count was initiated from at 0930 h to 1300 h and the daytime basking crocodiles will be manually counted as per Vyas et al (2013).
  • Nocturnal spot light survey: Not to be used due to river access difficulties.
  • Body size estimates: Crocodile size classes based on total length (TL) classified as TL < 1 m as juveniles, between 1.1 and 2 m as sub-adults, and > 2 m as adults. Use of 8×40 binoculars will be done to execute this task.
  • Citizens based count: Public volunteers participated for counting crocodiles, a team of 10 volunteers and a team leader was assigned a stretch of river and data was collected through methodologies as well with information from the locals.
  • Statistical analysis: Descriptive statistics was used to summarize information on crocodile population, encounter rates and abundance (number/km of river)  that was calculated as per Vyas et al (2013).