摘要:

ABSTRACT.1Daily patterns of oviposition and host‐feeding were examined inCoccophagus bartlettiAnnecke&Insley. Females began to host‐feed and oviposit during the second or third day after emergence. Thereafter, both activities occurred regularly.2During long observation periods (5 h) most oviposition (93%) and host‐feeding (90%) occurred within the first 3.5 h of wasps first encountering hosts. Experiments demonstrated that levels of activity were low for the rest of the day, and nocturnal oviposition occurred only if wasps had no alternative.3Dissection of female wasps that had been exposed to hosts, or withheld from them, for given periods of time, revealed that activity levels are governed by egg availability. Dispersal activity may also be influenced by the physiological state of the ovaries.4Production of a full complement of eggs (at 24±1°C (12 h L) and 18±1°C (12 h D)) took 48h or longer after host‐feeding, and if wasps were withheld from hosts and provided with honey, the effects of egg resorption could be detected after about 10 days. Trends in oögenesis and oösorption inC. bartlettifemales seem not to conform with interpretations of oögenesis‐oösorption cycles in other parasitoids.5The pattern of activity exhibited byC. bartlettifemales is not inflexible, but the major aspects mentioned above are species‐specific. In general, information is needed about daily and hourly patterns of parasitoid oviposition and host‐feeding before experiments are designed to test theories of parasitoid behaviour. Interpretation may otherwise rest on assumptions about their ph

ISSN:0307-6946    

DOI:10.1111/j.1365-2311.1988.tb00337.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

ABSTRACT.1Previous work has shown that femaleCallosobruchus maculatus(F.) (Coleoptera: Bruchidae) can accurately assess the number of eggs on a seed and use this information to produce a near uniform distribution of egg‐loads, so minimizing larval competition within hosts.2The decision to lay on a particular seed may be based on one of two possible rules: (i) a‘relative’rule, which compares the number of eggs on the present seed with that on previously encountered seeds; and (ii) an‘absolute’rule, which takes into account the current egg‐load alone.3This paper describes an experimental study of oviposition behaviour which concludes that an absolute measure of egg‐load probably determines egg‐laying decisions. The implications of this resul

ISSN:0307-6946    

DOI:10.1111/j.1365-2311.1988.tb00338.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

Book Reviewed in this Article:MULTIVARIATE ANALYSIS OF ECOLOGICAL COMMUNITIES. By P. G. N. Digby and R. A. Kempton. Pp. 206. In the Population and Community Biology series. published by Chapman and Hall, London.THE ECOLOGY OF SULAWESI. By Anthony J. Whitten, Muslimin Mustafa and Gregory S. Henderson. Pp. 777. Gadjah Mada University Press, 1987.ECOLOGY OF FOREST INSECTS. By Andrzej Szujecki. Pp. 600. Dr W. Junk Publishers, 1987. (Series EntomologicaTHE BEHAVIOURAL ECOLOGY OF ANTS. By John H. Sudd and Nigel R. Franks. Pp. 224. Blackie&Son Ltd. Bishopbriggs, Glasgow, 1987.THE BUTTERFLIES OF COSTA RICA AND THEIR NATURAL HISTORY. PAPILIONTDAE. PIERIDAE, NYMPHALIDAE. By Philip J. DeVries. Pp. 327. Princeton University Press, 1987.INSECT‐PLANT INTERACTIONS. Edited by J. R. Miller and T. A. Miller. Pp. 342. Springer. London, 1986. DM 15

ISSN:0307-6946    

DOI:10.1111/j.1365-2311.1988.tb00339.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY