Growth, reproduction and population growth ofCeriodaphnia cornuta sars and comparison of 7-day fecundity withCeriodaphnia dubia richard[J]. 海洋湖沼学报(英文), 1989,7(2):105-111.
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
Growth, reproduction and population growth ofCeriodaphnia cornuta sars and comparison of 7-day fecundity withCeriodaphnia dubia richard[J]. 海洋湖沼学报(英文), 1989,7(2):105-111. DOI: 10.1007/BF02842746.
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/BF02842746DOI:
Growth, reproduction and population growth ofCeriodaphnia cornuta sars and comparison of 7-day fecundity withCeriodaphnia dubia richard
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.
关键词
Keywords
references
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