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A simplified method for the estimation of the intrinsic rate of natural increase (rm) of aphids is proposed. Having determined the prereproductive tim...

The value of a temperature integrator was demonstrated when determining the development of the parasite Aphidius matricariae Hal. on the host Myzus pe...

The populations of Operophtera brumata (L.) on 8 cider apple trees of 4 cultivars were monitored from October 1972 until May 1975 in Western England. ...

1. Diet and the main feeding areas of wading birds on the Wash were surveyed during August to May in 1972-73 and 1973-74. The most important species o...

2. Studies of feeding routine during daylight showed that in winter waders generally spent least time in the roosts at high water and fed for the grea...

3. Responses of knots (Calidris canutus) and oystercatchers (Haematopus ostralegus) to their own density and to that of their prey, and the impact of ...

Environmental risk assessment of contaminants is conventionally based on toxic effects assessed in organism-level test systems. We suggest that, for t...

Expert opinion is often relied on to build ecological models when empirical data are absent. Despite widespread use, expert models often ignore uncert...

Agrobacterium tumefaciens was used to introduce two marker genes (kanamycin resistance and β-glucuronidase) into tobacco. These plants were grown in a...

Collembola and Acarina populations were sampled over two years from sites fertilized with three levels of superphosphate (0, 190, 380 kg ha-1yr-1) and...