By P.M. Walsh, D.J. Halley, M.P. Harris, A. del Nevo, I.M.W. Sim, M.L. Tasker
Designed for fieldworkers, this instruction manual introduces the technological know-how of tracking seabird colonies, a dialogue of basic tools, and distinct directions for tracking gulls, terns, auks, cormorant, shag, fulmar, Manx shearwater, gannet and skuas, together with illustrations of alternative levels of chick improvement. The instruction manual is in looseleaf structure, provided in a strong binder, with plastic envelopes to be used within the box, plus a small provide of recording types.
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Extra resources for Seabird Monitoring Handbook for Britain and Ireland: A Compilation of Methods for Survey and Monitoring of Breeding Seabirds
Again, try to cover as many nests as is safe and practicable; in small colonies this may be all nests. 2. Count nests during late incubation/early nestling period (mid to late May), depending on the colony. Count any nest with an adult apparently incubating or brooding, or with an unattended chick, as a breeding attempt. Keep a separate count of other occupied, well-built nests in which eggs may not yet have been laid or which may already have failed. Map or photograph nest positions if possible.
2. Apparently occupied nest (AON): one or two adult gannets occupying a site suitable for breeding, with nest material, no matter how flimsy, present, plus any large chicks without an obvious nest late in season. B. Please state if you used any other counting unit and define it precisely. Please do not correct or adjust counts in any way. *Problems/Comments: Add notes on any parts of the colony that were uncountable (and try to estimate proportion), any reservations about the count, etc. L. 1995.
A subjective assessment of whether there seemed fewer nests than one would expect from the numbers of adults present may provide some indication of an unusually late or poor breeding season, or a season when many adults have not attempted to nest. Counts of 'loafing' adults, not at nests, can thus be useful (but avoid counts in the evening, when 'extra' immatures and sub-adults may come to roost). 5. g. the seaward side of a stack). Try to estimate (minimum-maximum) the number of AONs likely to be hidden, based on numbers on visible sections (although these may not necessarily show similar densities to hidden sections) or on previous sea-based v.