| | Accession Number | 5001795 |
| | Title | Determination, biological consequences, and modeling of sex-specific demographic |
| | rates in declining, threatened, or endangered metapopulations |
| | Project Description | Proper management of animal populations requires an understanding of both population dynamics |
| | and ecology, and more research that integrates population dynamics and ecological studies is |
| | needed to identify the causal factors involved in population declines, recoveries, and viability. The |
| | information being generated from such studies will allow managers 1) to identify species-at-risk |
| | earlier, 2) to begin management programs before populations decline to critically low levels, and 3) |
| | to pick the best sites for the establishment and/or restoration of highly productive, or source |
| | populations. For mobile animals and birds, between-patch movements may contribute greatly to |
| | local within-patch dynamics, so the effectiveness of local management programs at all sites must |
| | be evaluated within the context of overall population changes on a regional or metapopulation |
| | scale. Previous work on estimating various dynamics parameters for migratory bird and other |
| | animal populations mostly has involved the separate estimation of breeding population sizes, |
| | reproductive rates, and survival rates, but it is now believed that the movements of individuals |
| | among the groups that make up metapopulations also are important factors affecting population |
| | sizes and rates of change. Further, in species where two parents usually share the duties of |
| | raising young, differences in the demographic parameters of the two sexes need to considered. |
| | The unequal sex-ratio in the breeding population of the study species (Roseate Tern, Sterna |
| | dougallii) has resulted in many females forming odd mating associations consisting of |
| | female-female pairs, trios of one male and two females, or multi- female groups. The productivity of |
| | such groups usually is much less than that of typical male- female pairs and the relative lack of |
| | males, therefore, may be a significant factor limiting overall population productivity and recovery. |
| | Keywords | capturerecapture models, long-term monitoring and resea, long-term research, metapopulation |
| | dynamics, restoration ecology, roseate tern, species-at-risk, |
| | Principal | Jeffrey A Spendelow, USGS Patuxent Wildlife Research Center: Jeff_Spendelow@usgs.gov; |
| | Investigators | James D Nichols, USGS Patuxent Wildlife Research Center: Jim_Nichols@usgs.gov; Ian C |
| | Nisbet, I.C.T. Nisbet & Company: ICNisbet@cape.com; Jeremy J Hatch, University of |
| | Massachusetts: Jeremy.Hatch@umb.edu; Joanna Burger, Rutgers University: |
| | Burger@biology.rutgers.edu; Helen Hays, Great Gull Island Project American Museum of Natural |
| | History: Hays@amnh.org; David A Shealer, Loras College: DShealer@loras.edu; James M Zingo, |
| | University of Massachusetts: JZingo@forwild.umass.edu; Jeff S Hatfield, USGS Patuxent Wildlife |
| | Research Center: Jeff_Hatfield@usgs.gov; William L Kendall, USGS Patuxent Wildlife Research |
| | Center: William_Kendall@usgs.gov; Patricia K Szczys, University of Massachusetts/Boston: |
| | Patty.Szczys@umb.edu; |
Return to SIS Projects Listing
