Impacts of Bee Pollens Consumption on Reproductive Fitness and Offspring Population Dynamics in Chrysoperla sinica Adults

doi:10.16409/j.cnki.2095-039x.2024.11.002

Abstract

Abstract: This study examined the impact of different bee pollens on reproductive fitness and offspring population dynamics of Chrysoperla sinica. Results showed that feeding on camellia bee pollen extended the pre-oviposition period of C. sinica adults to 6.00 days and significantly increased the total number of eggs laid to 228.30 per female, compared with the control group (5.00 days and 113.90 eggs). Corn bee pollen led to an average of 216.10 eggs per female, not significantly different from camellia bee pollen, but higher than the control group. However, rape bee pollen reduced female adults’ longevity to 12.20 d. All three treatments shortened the larval duration of the offspring significantly. Cocoon weight under camellia and corn bee pollen treatments was significantly higher than that of rape bee pollen treatment. In addition, camellia and corn bee pollen significantly improved the fecundity and longevity of offspring adults. Specifically, the total number of eggs laid per female increased from 116.80 in the control group to 275.70 and 253.40, respectively, while the longevity of female adults was extended from 20.45 d to 23.35 d and 25.70 d, respectively. After being treated with camellia and corn bee pollen, the net reproductive rate (R₀) of the offspring population significantly increased from 29.63 in the control group to 63.42 and 61.35, respectively. Meanwhile, intrinsic rate of increase (r_m) and finite rate of increase (λ) also exhibited notable enhancements, rising from 0.09 and 1.10 in the control group to 0.12, 1.12, and 0.11, 1.12, respectively. The population doubling time (D_t) was significantly shortened to 5.94 d and 6.08 d, respectively, compared with the control group (7.25 d). In conclusion, feeding C. sinica adults with corn bee pollen and camellia bee pollen can promote their fecundity and offspring population growth. These findings provide scientific basis for improving the indoor breeding efficiency of C. sinica.

Key words: Chrysoperla sinica, bee pollen, growth and development, reproduction, longevity, population growth

CLC Number:

S476.2

LI Fulin, SONG Jingrong, GUO Lian, ZHANG Min, ZHANG Pengjiu, HE Lifei, YANG Jing, GAO Yue, LIU Zhongfang. Impacts of Bee Pollens Consumption on Reproductive Fitness and Offspring Population Dynamics in Chrysoperla sinica Adults[J]. Chinese Journal of Biological Control, 2024, 40(6): 1237-1242.

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