Alaska field notes, v4435
Page 33
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
J.P. Myers 1975 Journal Transecto 1,2,3, Pt. Barrow Alaska 26 June (continued) totalo: Transect 1 2 3 species Phruialis dominica 0 1 0 Calidris alpina 4 1 0 C. baardii 2 0 0 C. unalaschensis ♀ 5 4 2 C. pusilla 2 0 0 Phalacrocorax fulicarius ♀ 4 5 4 [♀] - flying over unit, not displaying territorially [♂] - flying near unit, not over During the afternoon, B.A. Connors, Greenberg & I went about w/ PAP listening to learn rapeloat vegetation. this was at my instigation, wanting to learn something about local flora. We collected a variety of grasses, sedges, etc. + took them back to the lab. 27 June A deadly wind + heavy cloud cover should have been convincing enough but neither than take held & went out to Grid 3 in order to make some sense of the areas of mularator territorial space. Both my censuses of 23 June and FAPs of 26 June suggested very high, or mularator size of this area. Thus I spent the day from 0830 to 0500 following pectoralis on the grid (see following account): Territory: 5°, 1♀. Territory sizes ranged from ~ 0.57, 88 hectares to ~ 1.5 hectare, but this which may be low due to the gross way it was done; finer calculation with plane polarimeter. with an average of 1.1. Thus, if these signs can be extrapolated to the rest of the grid, totalizing 17.5 hectares, then should be ~ 15.9 (±) territorial 0° or given optimal packing, fewer - but probably 10-12 this figure compares favorably with my estimate from the 23 June census in which I estimated 18 0° of territories contained either wholly or partially on the grid. See diagram on next page or drawn position: shape of tracked bird's territories: they were traced from tracking records, using outer most recorded position to delimit border (or actually observed border), with line drawn so as to never enclose an angle > 180° (where < 180 and > 180). See following account