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Effect of Temperature on Development of Pardosa pseudoannulata (Bosenberg & Strand, 1906) and Neoscona mukerjei Tikader, 1980, Predominant Spiders of Rajasthan
- Vinod Kumari; Kailash Saini; N. P. Singh
- The effect of temperature on the development pattern of Pardosa pseudoannulata (Bosenberg & Strand, 1906) and Neoscona mukerjei Tikader, 1980 was studied. A stock culture of both the spiders was maintained in the laboratory at 25±2 ºC and 70±5% RH in BOD incubator. An actual determination of particular instars during experiments conducted on P. pseudoannulata and N. mukerjei, was carried out by counting and separating the subsequent exuviae shed off by developing spiderlings time to time throughout the moulting process. The results showed that female P. pseudoannulata had 7 instars while males 6 instars, although some males matured at the seventh instar, while in case of N. mukerjei, females matured after 9 instars and males got maturity after 7 instars. However, in these experiments development periods fluctuated at various temperatures (i.e. 20, 25 and 30˚C). Male P. pseudoannulata required 79.57±0.38 days at 20˚C for attaining adulthood, while at 25˚C and 30˚C, this period was recorded to be 74.54±1.2 and 82.49±0.47 days, respectively. Female P. pseudoannulata took 90.28±0.69, 85.24±0.69 and 93.06±0.91 days to become an adult at 20˚C, 25˚C and 30˚C, respectively. N. mukerjei, revealed that males took 98.06±0.48 days, 85.05±1.6 and 96.85±2.34 days for attaining the adulthood at 20˚C, 25˚C and 30˚C, respectively. On the other hand, females required 105.88±0.41, 97.25±1.29 and 106.92±0.5 days to get adult stage at 20˚C, 25˚C and 30°C, respectively. Analysis of variance (ANOVA) revealed that data on effect of temperature on development periods were found significantly different at three temperature ranges. 25°C temperature was found as most suitable temperature range for male and female (P. pseudoannulata and N. mukerjei) at which minimum development period was recorded. The length of development period of different instars of male and female of both spider species was found to be significantly higher at 20˚C and 30˚C.
- Select Volume / Issue:
- Year:
- 2016
- Type of Publication:
- Article
- Keywords:
- Neoscona mukerjei Tikader; 1980; Temperature; Development; Pardosa pseudoannulata Bosenberg and Strand 1906
- Journal:
- IJAIR
- Volume:
- 4
- Number:
- 4
- Pages:
- 610-613
- Month:
- January
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