U.S. Geological Survey Home Page USGS Patuxent Wildlife Research Center Science Meetings; dedicated to Chandler S. Robbins USGS Patuxent Wildlife Research Center; Science Meetings dedicated to Chandler S. Robbins Dedicated to Chan Robbins USGS Patuxent Wildlife Research Center; Science Meetings dedicated to Chandler S. Robbins Poster Abstracts from USGS Patuxent Wildlife Research Science Meetings, October, 2006
Patuxent Science Meeting 2006 Poster Abstract

Will the colonization of Penikese Island, Massachusetts, by endangered

Roseate Terns result in long-term success?

Spendelow JA, Mostello C (MA DFW), Nisbet ICT

More than 250 pairs of Roseate Terns colonized Penikese Island in Buzzards Bay,

Massachusetts in 2003. The colonizers were mostly six or more years of age with prior

breeding experience, and most were thought to have moved due to hazing conducted at Ram

Island (16 km away) to prevent the terns from becoming oiled following a spill in April 2003. In

2004, only 9 pairs of Roseates nested at Penikese, but in 2005, 84 pairs nested. Most

Roseates in 2005 also were experienced breeders, but more came from Bird Island (26 km

away) than from Ram. What happens in 2006 may have a major effect on the success of our

restoration efforts at this site because survivors of the Roseate cohort that fledged from here in

2003 will be recruiting to the breeding population and whether they show natal-site fidelity or

dispersal may be influenced by how many older experienced Roseates are nesting at Penikese

when the younger birds arrive. A formal mark-recapture analysis cannot be done in time for this

meeting, but in this poster we present some predictions of the likelihood of long-term success

based on a preliminary analysis of the ages, origins, and past intercolony movement histories of

the Roseates that nested at Penikese Island in 2003-2006.

Friday, September 22, 2006



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