Bird Ecology and Conservation A Handbook of Techniques

frequency, with signal coding to identify individuals. The high power require- ment raises tag mass to at least 15 g, and tracki ...

which give only 1.5 V and therefore require two cells in series to reach the same power as tags with lithium cells, at 3.0–3.7 V ...

(Fulleret al.1995; Higuchi et al.1996; Meyburg and Meyburg, 1998), including a pesticide hotspot (Woodbridge et al.in press), mo ...

(Brittas and Karlbom 1990) or nests that go undetected during visual searches (Hill 1998). There is much scope for improvements ...

best avoided on water birds in cold regions where they can load with ice. Patagial tags are only for species that flap their win ...

can greatly affect body size, and have even been found to vary between field work- ers in the same project (Patton et al. 1991). ...

development. Neither wing-loop nor lumbar designs have yet been tested on many species. For short-term studies, small tags glued ...

Long-established firms have wide experience with many species, and some have biologists to plan the optimal tag (and project) de ...

6.3.2Mobile tracking When tracking on foot, it is important to have lightweight, robust receivers with simple controls. Many rec ...

The next step is to collect data for analyses that add value to the fieldwork. In order to plan how best to collect data, it is ...

tracking every hour to collect location data from 5–6 animals (i.e. a minimal sample for statistical tests). For a study over mo ...

then it may be possible to correct the incomplete samples by fitting an asymp- totic regression. Other approaches to this increm ...

increasing numbers of random locations (Robertson et al. 1998). Whichever way one assesses the stability of outlines estimated r ...

resource availability in a way needed for resource-area dependence analysis (Kenward 2001). Dispersal detection can be defined s ...

[email protected]) and other software (Chapter 5), and similar tech- niques are suitable for recording survival of nests ...

reliable sources of high power-density will be required in future for military drones and could have applications in biology. Th ...

Hill, I. F., Cresswell, B. H., and Kenward, R.E. (1999). Field-testing the suitability of a new back-pack harness for radio-tagg ...

Wallace, M.P., Fuller, M., and Wiley, J. (1994). Patagial transmitters for large vultures and condors. In Raptor Conservation To ...

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7. Migration Susanne Åkesson and Anders Hedenström 7.1 Introduction The flights of some migratory birds are among the most impre ...