Results 161 to 170 of about 2,381 (201)

Clutch and egg size in ladybird beetles

Entomophaga, 1991
There was a significant positive correlation between the number of ovarioles and clutch size in the 8 species of cocinellid studied. There was no intraspecific correlation between egg size and clutch size under standard conditions. These tactics are discussed in terms of the allocation of resources to reproduction.
Stewart, L.A., Dixon, A.F.G., Ruzicka, Z., Iperti, G.   +3 more
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Carotenoids of the ladybird beetle, Coccinella septempunctata

Insect Biochemistry, 1977
Abstract The carotenoids of the seven-spot ladybird beetle ( Coccinella septempunctata ) consist largely of hydrocarbons. Phytoene, phytofluene, ζ-carotene, and its unsymmetrical isomer 7,8,11,12-tetrahydrolycopene, neurosporene, lycopene, 3,4-didehydrolycopene, 7′,8′,11′,12′-tetrahydro-γ-carotene, β-zeacarotene, γ-carotene, torulene, β-carotene, 7 ...
George Britton, Trevor W. Goodwin, Garry E. Harriman, William J.S. Lockley   +3 more
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Aphidophagous ladybird beetles adapt to an aphid symbiont

Functional Ecology, 2022
Abstract Bacterial symbionts can play a key role in the interactions between trophic levels. Certain symbionts are known to confer protection against natural enemies of their arthropod hosts. However, whether natural enemies evolve and adapt to prey symbionts is not well understood. In this study, we found that a free‐living strain of aphid symbiont
Xue‐Yong Du, Huan‐Ying Yang, Sen‐Rui Gong, Pei‐Fang Zhang, Pei‐Tao Chen, Yuan‐Sen Liang, Yu‐Hao Huang, Xue‐Fei Tang, Qiao‐Kui Chen, Patrick De Clercq, Hao‐Sen Li, Hong Pang   +11 more
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Species of Epilachna Ladybird Beetles

Zoological Science, 1997
The present paper reviews current studies on various aspects of reproductive isolation in a series of closely related phytophagous ladybird beetles called the Epilachna vigintioctomaculata complex, which is composed of two groups and four species: group A comprising E.
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Intraguild predation and successful invasion by introduced ladybird beetles

Oecologia, 2004
Introductions of two ladybird beetle (Coleoptera: Coccinellidae) species, Coccinella septempunctata and Harmonia axyridis, into North America for aphid biocontrol have been followed by declines in native species. We examined intraguild predation (IGP) between larvae of these two exotic species and larvae of the two most abundant native coccinellids in ...
William E, Snyder, Garrett M, Clevenger, Sanford D, Eigenbrode   +2 more
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Pyrrolidinoöxazolidine Alkaloids from Two Species of Ladybird Beetles

Journal of Natural Products, 1997
From the mixture of alkaloids obtained from adults of two species of ladybird beetles, Epilachna varivestis and Epilachna borealis, a novel bicyclic alkaloid, 5-(12'-aminotridecyl)pyrrolidinoöxazolidine [(5 alpha, 7 a beta)-hexahydro-alpha-methylpyrrolo[2,1-b]oxazole-5-dodecaneami ne] (2) was characterized on the basis of spectrometric and synthetic ...
P, Radford, A B, Attygalle, J, Meinwald, S R, Smedley, T, Eisner   +4 more
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Development of a wingless morph in the ladybird beetle, Adalia bipunctata

Evolution & Development, 2009
SUMMARY Many taxa of winged insects have independently lost the ability to fly and often possess reduced wings. Species exhibiting natural variation in wing morphology provide opportunities to investigate the genetics and developmental processes underlying the evolution of alternative wing morphs.
Suzanne T E, Lommen, Suzanne V, Saenko, Yoshinori, Tomoyasu, Paul M, Brakefield   +3 more
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Ladybird Beetles of the Australo-Pacific Region

2020
Abstract True ladybirds, classified in the tribe Coccinellini, are easily recognisable by their relatively large and shiny bodies and contrasting colour patterns. They are one of the most widely studied groups of beetles, being of economic importance and used as model organisms in biological and ecological research ...
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The ladybird beetles (Coleoptera, Coccinellidae) of Moscow Province

Entomological Review, 2016
Data on the fauna and ecology of the ladybird beetles (Coleoptera, Coccinellidae) of Moscow Province are summarized. In total, 60 species of 29 genera are recorded for this region. The paper is provided with 30 original color photographs of 29 species representing all the genera known from Moscow Province.
N. B. Nikitsky, A. S. Ukrainsky
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Chemical defense of the ladybird beetle Epilachna paenulata

Chemoecology, 2006
The defensive chemistry of the ladybird beetle Epilachna paenulata (Coleoptera: Coccinellidae) was characterized as a mixture of piperidine, homotropane and pyrrolidine alkaloids. Whole body extracts of adult beetles contain four major alkaloids: 1-(6-Methyl-2,3,4,5-tetrahydro-pyridin-2-yl)-propan-2-one; 1-(6-methyl-2-piperidyl)-propan-2-one; 9-aza-1 ...
Soledad Camarano, Andrés González, Carmen Rossini   +2 more
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