Amerman, Kenneth E., 1964, 1966
Page 95
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Transcription
Amerman, Kenneth 1964 39 been there for some time. We replaced it in the nest. March 9 - Chick dead by nest. March 15 - Total of 267 eggs laid so far in area A, 58 in area B (islet), of which 97 and 6 remain, respectively. March 31 - After not disturbing the birds in Area A for one week 14 eggs were missing or broken (2 of which we removed because they were not being incubated) and 13 new ones had been laid. Most of the losses were in older eggs; only three from 242 on. Probably many more of the old eggs will be lost or will not hatch because they already have been cracked or have gone bad due to not being incubated. Hopefully losses will remain low in the newer ones however. April 9 - Since last check 21 eggs lost, 34 laid, 99 total present. Losses continue to be heavy; 13 of the missing eggs were higher than 242. (Area A) The first week of March 42 eggs were laid (163-204) and 19 lost. Fifty-two were laid the second week (205-256), 31 the third (257-287), and the last (288-309) [March 22-31]. Losses for the same periods were 23, 30, 29, respectively (18 lost March 22-24). April 15 - First chick in Area A - egg No. 129, laid February 17 - 55 ± 2 days incubation. We have decided to check the colony every 5 days now. April 20 - The second chick was found in Area A (main colony) - probably egg 140, laid ___ days incubation. However, while we were checking the rest of the eggs a female swooped down and carried off the first chick, dropping at rear the water's edge, and then another or the same bird got the new chick as well. Both died, apparently from the impact; we took them as specimens. Eggs in Area A and 49 in Area B were pipped.