Anas fulvigula

Survival and Recovery Rates of Mottled Ducks in Georgia 2006-2013

SEAFWA Journal Volume 2, March 2015

The mottled duck (Anas fulvigula) naturally occurs in two populations: one in the coastal marsh of the western Gulf of Mexico and another in peninsular Florida. A third, introduced, population occurs on the southern Atlantic coast in South Carolina and Georgia. Most mottled ducks in Georgia occur on Altamaha Wildlife Management Area, McIntosh County. In 2006, we began banding mottled ducks in Georgia using airboats at night and collected banding and recovery data from 2006 through spring 2014. We used Program MARK to estimate survival rates, Seber recovery rates, and Brownie recovery rates...

Year
2015

Survival and Recovery Rates of Mottled Ducks Banded in Texas and Louisiana

SEAFWA Journal Volume 2, March 2015

The Western Gulf Coast population of the mottled duck (Anas fulvigula) is dependent on the Gulf coastal marsh to complete its entire life cycle. Band recovery data can be used to monitor mottled duck populations by estimating annual survival, indexing harvest rate, and assessing movements. Band returns from hunting seasons 1997 - 2013 were used to evaluate factors influencing annual survival, recovery rates, and movements of mottled ducks in Texas and Louisiana. For banding years of 1997 - 2013, 58,349 normal, wild mottled ducks were banded and released in Texas and Louisiana. Since 2002,...

Year
2015

Duckling Survival, Fecundity, and Habitat Selection of Mottled Duck Broods on the Upper Texas Gulf Coast

SEAFWA Journal Volume 2, March 2015

Mottled ducks (Anas fulvigula) on the western Gulf Coast have exhibited a steep population decline since the mid 1990s. Low rates of breeding incidence and nest success have been implicated in this decline, but duckling survival and the habitat needs of broods have not been previously investigated in this region. We fitted mottled duck ducklings and adult females with radio transmitters and tracked broods to estimate duckling survival and brood habitat selection on the upper Texas Gulf Coast. Duckling survival to 30 days was high (range among models 0.354-0.567) compared to other dabbling...

Year
2015

Blood Lead Exposure Concentrations in Mottled Ducks (Anas fulvigula) on the Upper Texas Coast

SEAFWA Journal Volume 2, March 2015

The mottled duck (Anas fulvigula) is a non-migratory waterfowl species dependent upon coastal marsh systems, including those on the Texas Chenier Plain National Wildlife Refuge (NWR) Complex, and considered a regional indicator species of marsh habitat quality. Research from the early 1970s, 1990s, and early - 2000s indicated that mottled ducks continued to exhibit elevated wing-bone lead (Pb) concentrations, decades after implementation of non-toxic shot regulations. However, wing-bone concentrations reflect lifetime accumulation of Pb, whereas blood Pb concentrations reflect more recent...

Year
2015