Studies of the physiology of hibernating Coccinellidae (Coleoptera): changes in the metabolic reserves and gonads

El-Hariri, G.

doi:10.1111/j.1365-3032.1966.tb00333.x

Cited by 14 publications

(11 citation statements)

References 8 publications

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“…Most of these coccinellids have their guts full of digested aphids and some of them ( 10 -20% ) also have vitellinized oocytes (Hodek 1962 ;Table 6.1 ). This fi nding was confi rmed in a recent study on populations from exceptional event; it has been proved to occur in P. quatuordecimpunctata by Hariri (1966) in England, in C. septempunctata by Sundby (1968) in Norway, and in two species ( Har. axyridis and Aiolocaria hexaspilota ) introduced to central Asia from the Far East (Savoiskaya 1970a, b ).…”

Section: Ovary S Permathecamentioning

confidence: 64%

“…on P. quatuordecimpunctata , Hariri 1966 ;C. novemnotata , McMullen 1967a ) the ovaries of diapausing females are described as consisting of mere germaria.…”

Section: Ovary S Permathecamentioning

confidence: 99%

“…Flight muscle fi bres are well developed immediately after arrival at the aestivohibernation sites, but are gradually resorbed to about insect species which were analyzed before this study. In three coccinellid species, Hariri (1966) found 5 -9 mg fat per beetle in the much heavier C. septempunctata , 1 -3 mg in A. bipunctata and 1 -2 mg in P. quatuordecimpunctata . Coccidophagous Chil.…”

Section: Flight M Usclesmentioning

confidence: 99%

“…The proportions of the initial fat content consumed throughout the whole hibernation period in C. septempunctata , A. bipunctata and P. quatuordecimpunctata were, for males and females, respectively, as follows: 49 and 61, 75 and 87, and 71 and 60% (Hariri 1966 ). Chil.…”

Section: Rate Of D Ecreasementioning

confidence: 99%

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Diapause/Dormancy

Hodek

2012

Ecology and Behaviour of the Ladybird Beetles (Coccinellidae)

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Section: Ovary S Permathecamentioning

confidence: 64%

“…on P. quatuordecimpunctata , Hariri 1966 ;C. novemnotata , McMullen 1967a ) the ovaries of diapausing females are described as consisting of mere germaria.…”

Section: Ovary S Permathecamentioning

confidence: 99%

Section: Flight M Usclesmentioning

confidence: 99%

Section: Rate Of D Ecreasementioning

confidence: 99%

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Diapause/Dormancy

Hodek

2012

Ecology and Behaviour of the Ladybird Beetles (Coccinellidae)

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“…Individuals were frozen for dissection at regular intervals. On the basis of earlier studies (El-Hariri 1966;Sakurai et al 1986;Okuda and Hodek 1989;Phoofolo and Obrycki 1995;Iperti and Bertand 2001) five stages of ovarian development were distinguished (Table 2).…”

Section: Determination Of Ovary Development During Hibernationmentioning

confidence: 99%

Mode of overwintering of invasive Harmonia axyridis in the Netherlands

et al. 2011

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After establishment of Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) in Europe, population densities of native ladybird species have decreased. The post-hibernation onset of female reproduction, a key characteristic influencing population dynamics and competition with related species, was studied. Hibernating individuals were collected and transferred to outdoor cages to continue overwintering. Every two weeks a sample of individuals was transferred to long-day, warm conditions. Intensity of dormancy was studied by determining the pre-oviposition period and ovarian development. Preoviposition periods were short throughout our observations, indicating that Harmonia axyridis was not in diapause but in a quiescent state. H. axyridis becomes active rapidly when temperature rises in spring but is not active earlier in the year than native species. Neither the mode of overwintering, nor the onset of spring activity can explain the invasion success of H. axyridis.

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Ecological requirements for hibernatingPropylea quatuordecimpunctata (L.) andCoccinella septempunctata [Col.: Coccinellidae]

Hemptinne

1988

Entomophaga

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During 3 successive winters, we studied the dormancy sites of Propylea quatuordecimpunctata (L.) and Coccinella septempunctata L., 2 species of ladybirds which hibernate in leaf litter. Samples of litter were taken from several kinds of forest to study the influence of 3 variables (exposure ; altitude ; sampling place : edge or inner wood) on the abundance of ladybirds.We found the ecological requirements of the 2 species of coccinellids to be quite different : C. septempunctata prefers forest edges orientated towards the South and the West. P. quatuordecimpunctata prefers the inner wood and does not show a preference for station exposure. For each species, the number of ladybirds collected in the samples is positively correlated with station altitude. In addition, some observations were carried out to examine the main mortality factors just before and during dormancy. In maize fields near dormancy sites, the harvest is very harmful for C. septempunctata. During the winter, P. quatuordecimpunctata and C. septempunctata suffer from Beauveria ssp. and some ladybirds have parasitoids.KEY-WORDS: Propylea quatuordecimpunctata, Coccinella septempunctata, hibernation, Beauveria ssp., parasitoids.The aphidophagous Coccinellidae of agricultural biocenosis hibernate in sites whose characteristics vary in relation to the different species. For example, Semiadalia undecimnotata (Schneider) hibernates at the top of hills or mountains (Iperti, 1966a ;Hodek, 1973), Adalia bipunctata (L.) prefers crevices in buildings or in tree bark (Hodek, 1973 ;Brakefield, 1984 ;Hemptinne, 1985) while Propylea quatuordecimpunctata (L.) and Coccinella septempunctata L. are known to spend the winter in forest litter (Bielawski, 1961 ; SavoTskaya, 1960;Sem'yanov, 1965;Hodek, 1973; Larochelle & Larivi~re, 1980;Basedow, 1982).A good knowledge of dormancy sites and ladybird ecology would enable building up aphid control strategies and land management which is compatible with biological control. Hippodamia convergens (Guerin) clearly illustrates these points. Indeed, biological control experiments with this ladybird were inconclusive because of an incomplete understanding of migratory behaviour (Carnes, 1912a, b). Moreover for biological control, a network of dormancy sites and cultures which can be used as breeding places and shelter is preferable

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Studies of the physiology of hibernating Coccinellidae (Coleoptera): changes in the metabolic reserves and gonads

Abstract: SYNOPSIS An account is given of changes in the fat and glycogen reserves and of the gonads of three species of aphidophagous Coccinellids during hibernation in southern England.

Cited by 14 publications

References 8 publications

Diapause/Dormancy

Diapause/Dormancy

Mode of overwintering of invasive Harmonia axyridis in the Netherlands

Ecological requirements for hibernatingPropylea quatuordecimpunctata (L.) andCoccinella septempunctata [Col.: Coccinellidae]

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