| Intrinsic advantages of Cheilomenes sexmaculata over two coexisting Coccinella species （Coleoptera：Coccinellidae） |
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| 作者姓名： | OMKAR AHMADPERVEZ GEETANJALIMISHRA SHEFALISRIVASTAVA SATYENDRAK.SINGH AVANISHK.GUPTA |
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| 作者单位： | LadybirdResearchLaboratory,DepartmentofZoology,UniversityofLucknow,Lucknow,India |
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| 摘 要： | Development, survival and reproductive performance of coexisting ladybird species, viz. Cheilomenes sexmaculata, Coccinella septempunctata, and Coccinella transversalis, of the tribe Coccinellini were studied and compared to assess their coexistence and ecological relationships. High values of life history parameters, viz. developmental rate,immature survival, fecundity, egg viability, reproductive rate and conversion of efficiency of ingested food were recorded for C. sexmaculata followed by C. transversalis and C.septempunctata suggesting that the former has intrinsic advantages over the latter two species. This could possibly counterbalance its disadvantages, like relatively smaller size and weight, thereby making it competitive. The developmental period increased with increase in body size. Exceptionally high fecundity after single mating has been recorded in C. sexmaculata. The egg viability, however, was lower than in both Coccinella species.
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| 关 键 词： | 鞘翅目 瓢虫科 繁殖率 生物转化效率 优势种 种群数量 生境 |
Intrinsic advantages of Cheilomenes sexmaculata over two coexisting Coccinella species (Coleoptera: Coccinellidae) |
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| Authors: | OMKAR AHMAD PERVEZ GEETANJALI MISHRA SHEFALI SRIVASTAVA SATYENDRA K SINGH AVANISH K GUPTA |
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| Institution: | Ladybird Research Laboratory, Department of Zoology, University of Lucknow, Lucknow, India |
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| Abstract: | Abstract Development, survival and reproductive performance of coexisting ladybird species, viz. Cheilomenes sexmaculata, Coccinella septempunctata , and Coccinella transversalis , of the tribe Coccinellini were studied and compared to assess their coexistence and ecological relationships. High values of life history parameters, viz. developmental rate, immature survival, fecundity, egg viability, reproductive rate and conversion of efficiency of ingested food were recorded for C. sexmaculata followed by C. transversalis and C. septempunctata suggesting that the former has intrinsic advantages over the latter two species. This could possibly counterbalance its disadvantages, like relatively smaller size and weight, thereby making it competitive. The developmental period increased with increase in body size. Exceptionally high fecundity after single mating has been recorded in C. sexmaculata. The egg viability, however, was lower than in both Coccinella species. |
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| Keywords: | Cheilomenes sexmaculata Coccinella septempunctata Coccinella transversalis size reproductive rate bioconversion efficiency |
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