Growth, reproduction and population growth ofCeriodaphnia cornuta sars and comparison of 7-day fecundity withCeriodaphnia dubia richard

Zhuang Dehui

doi:10.1007/BF02842746

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Growth, reproduction and population growth ofCeriodaphnia cornuta sars and comparison of 7-day fecundity withCeriodaphnia dubia richard

Updated：2023-05-16

- Growth, reproduction and population growth ofCeriodaphnia cornuta sars and comparison of 7-day fecundity withCeriodaphnia dubia richard
- Journal of Oceanology and Limnology Vol. 7, Issue 2, Pages: 105-111(1989)
- Affiliations：
  
  Institute of Hydrobiology
- Author bio：
- Funds：
- DOI：10.1007/BF02842746
  CLC：
- Published：1989
- Accepted：
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Dehui, Z. Growth, reproduction and population growth ofCeriodaphnia cornuta sars and comparison of 7-day fecundity withCeriodaphnia dubia richard., Chin. J. Ocean. Limnol. 7, 105–111 (1989). https://doi.org/10.1007/BF02842746
DOI：

Dehui, Z. Growth, reproduction and population growth ofCeriodaphnia cornuta sars and comparison of 7-day fecundity withCeriodaphnia dubia richard., Chin. J. Ocean. Limnol. 7, 105–111 (1989). https://doi.org/10.1007/BF02842746 DOI：

摘要

Abstract

Biology of parthenogenetic females ofCeriodaphnia cornuta Sars was studied under laboratory conditions. The mean length of neonates (first-young instars) ofCeriodaphnia cornuta was found to be 0.27 mm at 25±1°C and that of the first adult instars 0.50 mm. A maximum length of 0.69 mm was attained at the 8th adult instar. The mean longevity was found to be 19.0 days for 3 preadult and 8 adult instars. Sex maturity was reached in 4.26 days. The mean number of young per brood was 6.21. The total production for each adult reached 49.7. The maximum reproduction period occurred during the 4th adult instar. At this age

the animals were 10.25 days old

and had a body length of 0.65 mm. The innate capacity for increase (r m) was 0.40 per female per day

the net reproduction rate (R 0) was 33.601 per generation

the mean length of a generation (T) was 8.786 days

and the finite rate for increase (λ) was 1.492 per female per day. Comparisons using the t-test indicated that the number of eggs produced and number of broods ofC. cornuta andC. dubia were not significantly different (p>0.05) after 7 days.

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references

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