Population Density Marbled Murrelet

The distance from shore of the offshore boundary for the target population varied by zone and.

Population density marbled murrelet.

It is a member of the auk family. Summary of estimated density and population rounded to nearest 100 birds of the marbled murrelet in all zones surveyed conservation zones 1 5 2001 2010. At sea marbled murrelet population monitoring since 2000 wdfw has joined usda forest service pacific northwest research station u s. Within a single planning unit were averaged adjusting for survey effort to calculate the illustrated metric average density of marbled murrelet by planning unit.

Washington marbled murrelet population density trend for 2001 2015 for zones 1 and 2 combined all marine waters of washington state 15 2015 marbled murrelet monitoring 1 in 1992 the marbled murrelet was listed as u s. Population trends of the marbled murrelet 773 on patterns of murrelet density miller et al. 2006 raphael et al. Our monitoring plan is specifically designed to estimate marbled murrelet density population size and population trend in each of five geographic areas con servation zones between the northern tip of washington state and san.

Abstract the marbled murrelet brachyramphus marmoratus is federally threatened in part of its range in western north america information on density and productivity is important for managing populations. The density values range from 0 01 birds per square kilometre to 3 300 birds per square kilometre with the vast majority of the. 2 marbled murrelet entanglements occur in pacific salmon gillnet fisheries in the salish sea marbled murrelet population in washington was in decline from 2001 2010 miller et al. Open in new tab table 1.

The marbled murrelet brachyramphus marmoratus is a small seabird from the north pacific. 2012 gillnet fishery catch effort has increased. Over an 18 yr. It nests in old growth forests or on the ground at higher latitudes where trees cannot grow.