FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W41192063> ?p ?o ?g. }

• W41192063 abstract "The Upper Mississippi River is an important habitat for migrating Mallards. However, siltation and development threaten the value of this habitat. We used banding data at a regional scale to determine the derivation and distribution of Mallard recoveries in the Upper Mississippi to study whether changes in habitat occurring during 1961-1989 were reflected in Mallard migration. The Upper Mississippi has attracted a constant proportion of recoveries from SW Saskatchewan, SE Saskatchewan, SW Manitoba and the Missouri River Basin during 1965-1989. We found no changes in Mallard recovery rates during 1965-1989 for any sex/age class banded in these breeding areas (P > 0.05), except a slight decrease for adult males banded in SW Saskatchewan (P = 0.026). The derivation of Mallard recoveries has not been stable during 1961-1989. The percent of Upper Mississippi recoveries from Missouri River Basin and Great Lakes declined, while SW Saskatchewan, SE Saskatchewan, and SW Manitoba increased. We found an unequal distribution of recoveries among Upper Mississippi navigation pools, which is probably due to differences in hunter pressure or an uneven distribution of quality habitat. Pools 1, 7, 12, 16, 22, 24, and 25, and the area below pool 26 all contributed over 500 total recoveries during 1961-1989. Our analyses of band recoveries found no evidence of decreased Mallard use of the Upper Mississippi. Whereas Upper Mississippi habitat may be above a critical threshold level, continued degradation of backwater habitats, caused by siltation, could ultimately affect watedowl use. Biologists should continue to use regional analyses of Mallard banding recoveries as one means of monitoring changes in watedowl and habitat quality on the Upper Mississippi. Page 2 INTRODUCTION The Upper Mississippi River (Upper Mississippi) is used as a migratory pathway by millions of birds. Bellrose (1968) estimated that 751,000 to 3,000,000 dabbling ducks used the Upper Mississippi each year. The Mississippi's north-south orientation leading from the northern prairies to the Gulf of Mexico provides a geographically well-defined corridor that concentrates the migratory movement into the greatest density of dabbling ducks in any flyway east of the Rocky Mountains (Bellrose 1968). Because of its importance as migratory habitat for waterfowl and other bird species, the Upper Mississippi s one of 34 areas of major concern as identified by the North American Waterfowl Management Plan (NAWMP) (NAWMP Committee, 1986). The Upper Mississippi meanders 1200 km (744 miles) from St. Paul, MN, to Cairo, IL, through a flood plain with numerous backwater sloughs and oxbows (Emlen et al. 1986). Three national wildlife refuges collectively occupy over two-thirds of the Upper Mississippi's length: the Upper Mississippi River National Wildlife and Fish Refuge (UMRNWFR), Mark Twain National Wildlife Refuge, and Trempealeau National Wildlife Refuge. North American Bird Bander Vol. 23 No. 1 The width of the Upper Mississippi varies from 3002000 meters, while its flood plain's span averages 2-4 km near St. Paul, MN, 5-10 km at the midpoint, and 10-20 km near Cairo, IL. Every 15-40 km, the river is interrupted by navigation dams, built in the 1930s, which create long artificial lakes, or with relatively stable levels of water and vegetation (Emlen et al. 1986). Although Upper Mississippi wetlands are relatively stable on a year-to-year basis when compared to the prairie pothole wetlands, long term changes have occurred because of sedimentation of backwater areas, increased barge traffic, and recreational use (Sparks 1995). For example, Pool 5 had a 56% decrease in submergent plants and a 54% decrease in emergent vegetation from 1940 to 1975 (North Central Region 1987). Waterfowl managers are concerned about the effect of habitat degradation on migrating waterfowl. In order to manage effectively the Upper Mississippi, managers must first determine the relative importance of the Upper Mississippi to waterfowl populations using the Mississippi flyway. The Upper Mississippi s especially important o Mallards, which comprised 40.3% of the total duck harvest during 1946-1960 on the UMRNWFR (Green 1963) and 27.2% of the UMRNWFR's harvest during 1975-1984 (North Central Region 1987). Changes in the magnitude and distribution of use of the Upper Mississippi by Mallards may reflect long-term changes in the quality and quantity of habitat existing on the Upper Mississippi. Similar recovery analysis among the Upper Mississippi pools may help refuge managers prioritize management efforts. Although population counts of waterfowl would be a more direct measure of Upper Mississippi waterfowl use, population survey data have not been collected consistently. However, Mallard band-recovery data exist which cover the last 30 years. Munro and Kimball (1982) provided estimates, on a continental scale, for each state's historical waterfowl derivations, or origins. During 1961-1975, Mallards from the Missouri River Basin and SW Manitoba banding areas averaged 21.8% and 20.2%, respectively, of the recoveries in the five states surrounding the Upper Mississippi. OBJECTIVES We analyzed band-recovery data from Mallards banded during 1961-1989 and recovered on the Upper Mississippi. Our first objective was to study the importance of the Upper Mississippi to Mallards migrating from the SW Saskatchewan, SE Saskatchewan, SW Manitoba and Missouri River Basin banding areas, which lie along a geographical gradient away from the Upper Mississippi. We compared the proportion of banded waterfowl from the 4 banding areas using the Upper Mississippi in five time blocks during 1965-1989, and we •also performed linear regressions on recovery rates during 1965-1989 to detect changes in hunter effort on the Upper Mississippi. Our second objective was to use banding data on a small-scale, regional level to determine the derivation of the harvest. We attempted to detect change in the sample derivation during 1965-1989, and c. ompared the Upper Mississippi figures to Munro and Kimball's (1982) continental derivations. Our last objective was to use variation in the distribution of recoveries among the pools of the Upper Mississippi to detect contrasts and long-term changes in habitat quality and quantity." @default.
• W41192063 created "2016-06-24" @default.
• W41192063 creator A5005310874 @default.
• W41192063 creator A5056245890 @default.
• W41192063 date "1998-01-01" @default.
• W41192063 modified "2023-09-24" @default.
• W41192063 title "Distribution and Derivation of Mallard Band Recoveries from the Upper Mississippi River, 1961-1989" @default.
• W41192063 cites W142412835 @default.
• W41192063 cites W1545643184 @default.
• W41192063 cites W2090105212 @default.
• W41192063 cites W2324705668 @default.
• W41192063 cites W2520043259 @default.
• W41192063 cites W2539967350 @default.
• W41192063 cites W77840088 @default.
• W41192063 hasPublicationYear "1998" @default.
• W41192063 type Work @default.
• W41192063 sameAs 41192063 @default.
• W41192063 citedByCount "0" @default.
• W41192063 crossrefType "journal-article" @default.
• W41192063 hasAuthorship W41192063A5005310874 @default.
• W41192063 hasAuthorship W41192063A5056245890 @default.
• W41192063 hasConcept C109007969 @default.
• W41192063 hasConcept C110121322 @default.
• W41192063 hasConcept C126645576 @default.
• W41192063 hasConcept C127313418 @default.
• W41192063 hasConcept C134306372 @default.
• W41192063 hasConcept C151730666 @default.
• W41192063 hasConcept C185933670 @default.
• W41192063 hasConcept C187320778 @default.
• W41192063 hasConcept C18903297 @default.
• W41192063 hasConcept C205649164 @default.
• W41192063 hasConcept C206700591 @default.
• W41192063 hasConcept C2816523 @default.
• W41192063 hasConcept C33923547 @default.
• W41192063 hasConcept C39432304 @default.
• W41192063 hasConcept C505870484 @default.
• W41192063 hasConcept C58640448 @default.
• W41192063 hasConcept C76886044 @default.
• W41192063 hasConcept C86803240 @default.
• W41192063 hasConceptScore W41192063C109007969 @default.
• W41192063 hasConceptScore W41192063C110121322 @default.
• W41192063 hasConceptScore W41192063C126645576 @default.
• W41192063 hasConceptScore W41192063C127313418 @default.
• W41192063 hasConceptScore W41192063C134306372 @default.
• W41192063 hasConceptScore W41192063C151730666 @default.
• W41192063 hasConceptScore W41192063C185933670 @default.
• W41192063 hasConceptScore W41192063C187320778 @default.
• W41192063 hasConceptScore W41192063C18903297 @default.
• W41192063 hasConceptScore W41192063C205649164 @default.
• W41192063 hasConceptScore W41192063C206700591 @default.
• W41192063 hasConceptScore W41192063C2816523 @default.
• W41192063 hasConceptScore W41192063C33923547 @default.
• W41192063 hasConceptScore W41192063C39432304 @default.
• W41192063 hasConceptScore W41192063C505870484 @default.
• W41192063 hasConceptScore W41192063C58640448 @default.
• W41192063 hasConceptScore W41192063C76886044 @default.
• W41192063 hasConceptScore W41192063C86803240 @default.
• W41192063 hasLocation W411920631 @default.
• W41192063 hasOpenAccess W41192063 @default.
• W41192063 hasPrimaryLocation W411920631 @default.
• W41192063 hasRelatedWork W1517829362 @default.
• W41192063 hasRelatedWork W1548036210 @default.
• W41192063 hasRelatedWork W2054192807 @default.
• W41192063 hasRelatedWork W2071917371 @default.
• W41192063 hasRelatedWork W2099436428 @default.
• W41192063 hasRelatedWork W2129500891 @default.
• W41192063 hasRelatedWork W2152334659 @default.
• W41192063 hasRelatedWork W2162915293 @default.
• W41192063 hasRelatedWork W2169093246 @default.
• W41192063 hasRelatedWork W2172136037 @default.
• W41192063 hasRelatedWork W2172700612 @default.
• W41192063 hasRelatedWork W2177902630 @default.
• W41192063 hasRelatedWork W2187041809 @default.
• W41192063 hasRelatedWork W2225132031 @default.
• W41192063 hasRelatedWork W2253060806 @default.
• W41192063 hasRelatedWork W2324045331 @default.
• W41192063 hasRelatedWork W2529734530 @default.
• W41192063 hasRelatedWork W28553579 @default.
• W41192063 hasRelatedWork W2330644886 @default.
• W41192063 hasRelatedWork W2910121252 @default.
• W41192063 isParatext "false" @default.
• W41192063 isRetracted "false" @default.
• W41192063 magId "41192063" @default.
• W41192063 workType "article" @default.