Seasonal and Diel Changes in the Feeding Behaviour of Some Dabbling Duck Species on a Breeding Lake in Northern Sweden

1982 ◽  
Vol 13 (2) ◽  
pp. 129 ◽  
Author(s):  
Kjell Danell ◽  
Kjell Sjoberg
Keyword(s):  
Feeding Behaviour ◽  
Northern Sweden ◽  
Diel Changes ◽  
Duck Species ◽  
Dabbling Duck

Effectiveness of Spinning-Wing Decoys Varies Among Dabbling Duck Species and Locations

2006 ◽  
Vol 70 (3) ◽  
pp. 799-804 ◽  
Author(s):  
JOSHUA T. ACKERMAN ◽  
JOHN M. EADIE ◽  
MICHAEL L. SZYMANSKI ◽  
JASON H. CASWELL ◽  
MARK P. VRTISKA ◽  
...  
Keyword(s):  
Duck Species ◽  
Dabbling Duck

Hybridization between the Mallard and native dabbling ducks: causes, consequences and management.

2014 ◽  
Vol 20 (1) ◽  
pp. 41 ◽  
Author(s):  
P-J Guay ◽  
A Taysom ◽  
R Robinson ◽  
J P Tracey
Keyword(s):  
Introduced Species ◽  
Anas Platyrhynchos ◽  
Management Strategies ◽  
Dabbling Ducks ◽  
Monitoring Techniques ◽  
Duck Species ◽  
Black Duck ◽  
Dabbling Duck ◽  
The Pacific ◽  
The World

Waterbirds are currently facing various threats throughout the world. One threat that is often overlooked is hybridization with introduced species. This threatening process is especially significant for dabbling ducks (Genus Anas). The Mallard (Anas platyrhynchos) has been introduced to various parts of the world and now hybridizes and threatens numerous Anas species. In this paper, we review hybridization between Mallards and dabbling ducks with a specific emphasis on threats to the Pacific Black Duck (A. superciliosa). We then present an overview of the potential mechanisms of hybridization and discuss monitoring techniques. We conclude by proposing management strategies and speculating on the future of native dabbling duck species.

Temperature does not dictate the wintering distributions of European dabbling duck species

Ibis ◽  
2012 ◽  
Vol 155 (1) ◽  
pp. 80-88 ◽  
Author(s):  
Lars Dalby ◽  
Anthony D. Fox ◽  
Ib K. Petersen ◽  
Simon Delany ◽  
Jens-Christian Svenning
Keyword(s):  
Duck Species ◽  
Dabbling Duck

scholarly journals Dna barcoding, population genetics, and phylogenetics of the illegally hunted Philippine Duck Anas luzonica (Aves: Anseriformes: Anatidae)

2017 ◽  
Vol 9 (5) ◽  
pp. 10141
Author(s):  
Ardea Mingoa Licuanan ◽  
Mariano RoyMartin Duya ◽  
Perry Sim Ong ◽  
Ian Kendrich Carandang Fontanilla
Keyword(s):  
Dna Barcoding ◽  
Sampling Site ◽  
Haplotype Diversity ◽  
The Philippines ◽  
Habitat Destruction ◽  
High Genetic Diversity ◽  
Tissue Samples ◽  
Duck Species ◽  
Dabbling Duck ◽  
Coi Sequences

DNA barcoding is extensively used as a species identification and delineation tool.  The aim of this study was to generate a barcode profile for mitochondrial cytochrome c oxidase subunit 1 (COI) in the Philippine Duck Anas luzonica, a dabbling duck species endemic to the Philippines that is classified as ‘Vulnerable’ by the International Union for Conservation of Nature (BirdLife International 2016).  COI barcodes were successfully obtained using muscle tissue samples from 46 A. luzonica individuals confiscated from illegal hunters in Pantabangan, Nueva Ecija.  Analysis of TrN+Γ+I distances among the Anas luzonica COI sequences and those of 25 other Anas species revealed that COI barcodes cannot generally delineate hybridizing species.  While Anas luzonica was differentiated from other species it is known to hybridize with and formed a monophyletic group in the neighbor-joining tree generated, sampling from areas of sympatry is needed since individuals were obtained from only one sampling site.  The population structure of the Anas luzonica population was also examined using mitochondrial DNA control region and COI sequences.  The population had high haplotype diversity and low nucleotide diversity, an indication that a bottleneck event had occurred, which is likely due to extreme hunting pressures and habitat destruction.  The population under study exhibited high genetic diversity.  Given that the samples for this study came from a single locality, sampling from other localities is required to determine whether other populations are facing the risk of reduced fitness (inbreeding depression).

Phylogenetic Relationships among Dabbling Duck Species in Korea using COI Gene Variations in mtDNA

2012 ◽  
Vol 49 (3) ◽  
pp. 163-170 ◽  
Author(s):  
Seon-Deok Jin ◽  
Md. Rashedul Hoque ◽  
Dong-Won Seo ◽  
In-Kyu Kim ◽  
Cheorun Jo ◽  
...  
Keyword(s):  
Phylogenetic Relationships ◽  
Coi Gene ◽  
Duck Species ◽  
Dabbling Duck

scholarly journals Moving at the speed of flight: dabbling duck-movement rates and the relationship with electronic tracking interval

2019 ◽  
Vol 46 (6) ◽  
pp. 533
Author(s):  
Fiona McDuie ◽  
Michael L. Casazza ◽  
David Keiter ◽  
Cory T. Overton ◽  
Mark P. Herzog ◽  
...  
Keyword(s):  
Interval Data ◽  
Migratory Flight ◽  
Duck Species ◽  
Resource Needs ◽  
Dabbling Duck ◽  
Temporal Intervals ◽  
Spatio Temporal ◽  
The Difference ◽  
Electronic Tracking ◽  
Time And Energy

Abstract Context Effective wildlife management requires information on habitat and resource needs, which can be estimated with movement information and modelling energetics. One necessary component of avian models is flight speeds at multiple temporal scales. Technology has limited the ability to accurately assess flight speeds, leading to estimates of questionable accuracy, many of which have not been updated in almost a century. Aims We aimed to update flight speeds of ducks, and differentiate between migratory and non-migratory flight speeds, a detail that was unclear in previous estimates. We also analysed the difference in speeds of migratory and non-migratory flights, and quantified how data collected at different temporal intervals affected estimates of flight speed. Methods We tracked six California dabbling duck species with high spatio-temporal resolution GPS–GSM transmitters, calculated speeds of different flight types, and modelled how estimates varied by flight and data interval (30min to 6h). Key results Median migratory speeds were faster (but non-significant) for the larger mallard (Anas platyrhynchos; 82.5kmh–1), northern pintail (Anas acuta; 79.0kmh–1) and gadwall (Mareca strepera; 70.6kmh–1), than the smaller-bodied northern shoveler (Spatula clypeata; 65.7kmh–1), cinnamon teal (Spatula cyanoptera; 63.5kmh–1) and American wigeon (Mareca Americana; 52kmh–1). Migratory flights were faster than non-migratory flights for all species and speeds were consistently slower with an increasing data interval. Implications The need to balance time and energy requirements may drive different speeds for migratory and non-migratory flights. Lower speeds at longer intervals are likely to be due to a greater proportion of ‘loafing’ time included in flighted segments, demonstrating that data acquired at different intervals provide a means to evaluate and estimate behaviours that influence speed estimation. Shorter-interval data should be the most accurate, but longer-interval data may be easier to collect over lengthier timeframes, so it may be expedient to trade-off a degree of accuracy in broad-scale studies for the larger dataset. Our updated flight speeds for dabbling duck species can be used to parameterise and validate energetics models, guide management decisions regarding optimal habitat distribution, and, ultimately, improve conservation management of wetlands for waterfowl.

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