Bird Ecology and Conservation A Handbook of Techniques

carbamates are the most widely used insecticides and birds frequently suffer nontar- get exposure. Both types of insecticide act ...

a series of life-history stages, with each stage largely devoted to a particular activity at the optimal time of year, for examp ...

and the radioactivity remaining in one of the fractions is counted. The amount of antibody and labeled hormone is constant and t ...

The most commonly used direct assessment is using doubly labeled water (Speakman 1997, 2000). The method depends on the fact tha ...

numbers of repeats. Thus by determining the lengths of these repeated sequences it is possible to discriminate between different ...

been possible to determine the phylogeny, assess differentiation within and between regions and show evidence for bottlenecks an ...

Bello., N, Francino, O., Sanchez, A. (2001). Isolation of genomic DNA from feathers. J. Vet. Diag. Invest., 13, 162–164. Blaxter ...

Goymann, W., Mostl, E., and Gwinner, E. (2002). Non-invasive methods to measure androgen metabolites in excrements of European S ...

Morton, D.B., Abbot, D., Barclay, R., Close, B.S., Ewbank, R., Gask, D., Heath, M., Mattic, S., Poole, T., Seamer, J., Southee, ...

Timbrell, J.A. (1995). Introduction to Toxicology. Taylor & Francis, London. Vanderkist, B.A., Williams, T.D., Betram, D.F., ...

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10. Diet and foraging behavior William J. Sutherland 10.1 Introduction Studies of diet and foraging behavior can help answer a w ...

prey available. For example, observations may show that the bird is feeding from leaf litter in damp areas in the forest and tak ...

10.2.2 Nest observations The food carried in the bill to the nestlings or incubating partners can often be identified but may di ...

throats and foreheads of captured nectivorous birds can be used to determine the flowers visited. 10.2.4 Dropping analysis Birds ...

For assessing the diet it is necessary to identify parts that are retained in the droppings but for which there are only a few ( ...

which represents a small mass of digestible flesh, and a few large beetle mandibles, each of which is equivalent to much more fo ...

found divided by the number eaten. Similar experiments can determine if digestibility varies with prey size. 10.2.5 Pellet analy ...

10.2.7 Direct observations of crop For some granivores species the seeds and some invertebrates within the gullet can be identif ...

spacing of the bill lamellae of dabbling ducks indicates the likely size range of prey. Similarly sex differences in morphology ...