Results 331 to 340 of about 157,431 (344)

Photoresponses of second-instar Chaoborus larvae

Journal of Insect Physiology, 1982
Abstract The diel vertical migration of Chaoborus larvae varies with larval instar. Although light is involved in the control of vertical migration the contribution of larval photoresponses is unknown. In order to describe ontogenetic changes in larval photoresponses we measured photoresponses of second-instar Chaoborus punctipennis larvae in the
Michael C. Swift, Michael C. Swift, Richard B. Forward, Richard B. Forward   +3 more
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A Note on the Use of the Terms Instar and Stage1

Annals of the Entomological Society of America, 1978
The terms instar and stadium are not synonymous. An instar forms at the moment of apolysis or as soon as the 1st layer of a new cuticle is laid down underneath the old one. This period in the insect's life is always initially concealed. A stadium begins at the moment of ecdysis, when the instar emerges from either an egg shell, an old larval cuticle ...
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The Problem of Instar Numbers in Arthropods

2011
The last 20 years the distribution of computing power to individuals through personal computers and the subsequent explosion in the production of scientific software dramatically changed the scientific work. The initial availability of expensive statistical software was replaced by inexpensive commercial packages – i.e., SPSS, SYSTAT, SAS, CART among ...
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Copepod Instar Survival and Predation by Zooplankton

Journal of the Fisheries Research Board of Canada, 1977
The survivorship of each instar of three cohorts of Leptodiaptomus minutus from Bluff Lake, Nova Scotia, is presented. High naupliar mortality but low copepodite mortality occurred. The previously reported values for the predation rate and size selection of prey by omnivorous zooplankton are compared with the observed mortality rates for the different
J. L. Confer, J. M. Cooley
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Biology of the eggs and first-instar larvae

1995
Egg-laying behaviour and selection of oviposition sites, coupled with any subsequent redistribution of egg-masses through drift and active dispersal of first instar larvae, are primarily responsible for determining patterns of larval distribution. It is therefore both logical and convenient that they should be considered in combination.
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INSTAR DIFFERENTIATION IN LARVAL CHIRONOMIDAE (DIPTERA)

The Canadian Entomologist, 1974
AbstractExamination of the most commonly used criteria for separating instars in larval chironomids, based on a study of 29 species from three subfamilies in Marion Lake, British Columbia, revealed that only head capsule width or length is suitable. Most chironomids appear to have four larval instars.
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Survival of Unfed First-Instar Grasshoppers

The Canadian Entomologist, 1960
During some investigations on grasshoppers it became necessary to know how long they would survive without food or water after hatching. The literature contains only scanty observations. Washburn (1911) reported that grasshoppers “freshly hatched, can live from four to five days without food”. Langford (1930) showed that 30 per cent of Melanoplus femur-
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Transactio est Instar Rei Iudicatae

2012
Breve scheda di presentazione del noto brocardo: nozione, fonti, sviluppi.
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Rapid Laboratory Identification of Instars of the Greenbug12

Journal of Economic Entomology, 1972
James R. Cate, D. G. Bottrell, A. L. Walker   +2 more
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RESPIRATORY EXCHANGE AS A GUIDE TO INSTAR LENGTH

Proceedings of the Royal Entomological Society of London. Series A, General Entomology, 1948
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