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? <br />? <br />Table 9. Causes of egg loss at least tern colonies al.ong the Platte <br />. River, 1984 and 1986. - <br />1984 1986 <br />12 Sandpit 10 Sandpit 6 Sandbar <br />Colonies Colonies Colonies <br /># Eggs laid 319 282 392 <br /># Eggs with known outcome 275 (86-%) 1.8 (66%) 317 (81%) <br /># Eggs hatched - 109 (34%) 68 (245%) 187 (48%) <br /># Eggs lost 166 (52%) 119 (425%) 130 (33*) <br />Causes of Ecrcr Loss <br />Lost to predation 17 (105%) 14 (12%) 11 ( 8%) <br />Lost to human disturbance 28 (17%) 8 ( 75%) 0 ( 0%} <br />Lost to abandonment for <br />undetermined reasons 96 (585%) 11 ( 95%) 18 (145%) <br />Lost to flooding 0 ( 05%) 9 ( 7%) 96 (74%) <br />Lost to other factors <br />(weather, unknown causes, <br />etc.) 25 (155%) 77 (65%) 5 ( 4-%) <br />Total Eggs Lost 166 119 130