Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Infant mortality rates across the six years of the study for the troop [red line] and for each matriline. aNo females of reproductive age were present for Matriline 1. bReproducing females were present for matriline 1 for the first time since the overthrow in 2009; they experienced no infant loss in 2012.
