Surveys in the Tierra del Fuego wintering area and Delaware Bay suggest the red knot population has stabilized at a low level. POPULATION. The collapsed lemming cycle model performed best, accruing ~35% of the model weight, followed closely by the horseshoe crab egg abundance model, which accrued ~30% of the weight. subspecies of the Red Knot. The Red Knot (Calidris canutus) is a shorebird protected under the Migratory Birds Convention Act, 1994.
"As a result of the Red Knot Status Assessment in Fall 2006, the U.S. The Calidris canutus rufa subspecies (hereafter rufa) is listed on Schedule 1 of the Species at Risk Act. High counts of more than 90,000 birds in the 1980s have fallen to about 13,000 birds in 2007. Relevés de la population de Bécasseaux maubèches, dont les résultats sont utilisés à l'échelle internationale. Red knot ; Calidris canutus rufa, breeding plumage : Non-breeding plumage Partners in Flight estimates the global breeding population (all subspecies) at about 1 million individuals, rates the species a 13 out of 20 for its Continental Concern Score, and includes it on their Yellow Watch List for declining species. With 4 models of Red Knot population dynamics and only 10 yr of data, no hypothesis clearly predicted population count data better than another.

rufa

(2004) developed and published Red Knot population models linking Red Knot population dynamics to horseshoe crab populations and management in Delaware Bay, … rufa. More than 80 percent of the world's Red Knot (rufa subspecies) population is estimated to be in Canada. As noted earlier, McGowan et al. Horseshoe Crab–linked Red Knot Population Models. The IUCN Red List lists Red Knot as a Near Threatened species.
(2011a) and Baker et al. Red Knot Latin name: Calidris canutus French name: Bécasseau maubèche Spanish name: Chorlo Rojizo Inuktitut name: Qajorlak The entire rufa subspecies breeding population is 1 The estimated population of the rufasubspecies is 42,000 individuals. The Red Knot roselaari type is divided into three populations: the Pacific coast population, the Florida and southeastern United States population, and the Brazilian Maranhão population. During the same period, the red knot population stopping in Delaware Bay declined by more than 75%, in part because the annual survival rate of adult knots wintering in Tierra del Fuego declined. The Pacific coast population breeds in northwestern Alaska and on Wrangell Island. Two subspecies of Red Knot migrate across North America. 2 In the past decades, rufa and roselaari Red Knots have experienced population declines. Red Knot Weighing about as much as a D-size battery, Red Knots fly up to 15,000 km (9,300 miles) during their yearly migration between Arctic breeding grounds and wintering grounds farther south, which for some Red Knots is the southern tip of South America. The estimated population of the roselaarisubspecies is 21,770 individuals. Calidris canutus, which breeds in the central Canadian arctic and mainly winters in Tierra del Fuego, has declined dramatically over the past twenty years. Despite restrictions, the 2007 horseshoe crab harvest was still greater than the 1990 harvest, and no recovery of knots was detectable. During the study period red knot numbers have fallen dramatically. Fish and Wildlife Service announced the red knot as a candidate for federal listing..