First observation of the breeding of common shelduck, Tadorna tadorna , in Algerian Saharan streams

2021 ◽  
Author(s):  
Yassine Nouidjem ◽  
Fateh Mimeche
Keyword(s):  
Common Shelduck

TERRITORIALITY IN THE COMMON SHELDUCK TADORNA TADORNA

Ibis ◽  
2008 ◽  
Vol 112 (3) ◽  
pp. 330-335 ◽  
Author(s):  
Colin M. Young
Keyword(s):  
The Common ◽  
Common Shelduck

Lead exposure in common shelduck (Tadorna tadorna): Tracking the success of the Pb shot ban for hunting in Spanish wetlands

2019 ◽  
Vol 106 ◽  
pp. 147-151 ◽  
Author(s):  
Irene Valverde ◽  
Silvia Espín ◽  
Isabel Navas ◽  
Pedro María-Mojica ◽  
José M. Gil ◽  
...  
Keyword(s):  
Lead Exposure ◽  
Common Shelduck

scholarly journals Breeding birds in the Narta Lagoon (SW Albania) in 2016

Acrocephalus ◽  
2018 ◽  
Vol 39 (176-177) ◽  
pp. 7-25 ◽  
Author(s):  
Vladimir Mladenov ◽  
Ralitsa Georgieva ◽  
Mihail Iliev ◽  
Yana Barzova ◽  
Sylvia Djulgerova ◽  
...  
Keyword(s):  
Coastal Wetlands ◽  
Bird Species ◽  
Relevant Information ◽  
Breeding Birds ◽  
Breeding Bird ◽  
Charadrius Alexandrinus ◽  
Bird Fauna ◽  
Olive Trees ◽  
Common Shelduck ◽  
Kentish Plover

Abstract The Narta Lagoon (59 km2) is one of the largest and most important coastal wetlands for migratory and wintering waterbirds in Albania. However, the breeding bird fauna of the site is still poorly studied. The current work aims to broaden the knowledge on the list of breeding bird species, their numbers, distribution and threats in the zone (with a focus on waterbirds). Relevant information for spring migrants is also provided. The survey consisted of two field visits in April and May 2016. The entire wetland area was covered and all its habitats were visited. In total, 136 bird species were observed. The total number of breeding birds was estimated at 6,400 pairs of 85 species. The most abundant breeders were the Little Tern Sternula albifrons with 377 breeding pairs (bp), Avocet Recurvirostra avosetta with 121 bp, and Kentish Plover Charadrius alexandrinus with 96 bp. In total, 3,461 individuals belonging to 80 species were recorded as non-breeders. At the species level, the most numerous were Kentish Plover with 1,100 individuals (ind.), Marsh Sandpiper Tringa stagnatilis with 600 ind., Greater Flamingo Phoenicopterus roseus with 321 ind., Common Shelduck Tadorna tadorna with 130 ind., Spotted Redshank Tringa erythropus with 120 ind. and Dunlin Calidris alpina with 100 ind. Breeding birds assemblages within the main studied habitats (salinas, lagoon, pine forests, mixed farmland, rocky hills with olive trees, and grasslands with bushes near the coast) and threats (the most significant of which were illegal shooting, trapping and dangerous power grid) are also described. Recommendations for future bird-friendly management, appropriate conservation activities and eco-tourism in the area are made.

scholarly journals Consistent habitat preference underpins the geographically divergent autumn migration of individual Mongolian common shelducks

2019 ◽  
Vol 66 (4) ◽  
pp. 355-362 ◽  
Author(s):  
Fanjuan Meng ◽  
Xin Wang ◽  
Nyambayar Batbayar ◽  
Tseveenmyadag Natsagdorj ◽  
Batmunkh Davaasuren ◽  
...  
Keyword(s):  
Habitat Selection ◽  
Land Cover ◽  
Resource Selection ◽  
Population Level ◽  
Autumn Migration ◽  
Migration Routes ◽  
Stopover Site ◽  
Cross Prediction ◽  
Stopover Sites ◽  
Common Shelduck

Abstract While many avian populations follow narrow, well-defined “migratory corridors,” individuals from other populations undertake highly divergent individual migration routes, using widely dispersed stopover sites en route between breeding and wintering areas, although the reasons for these differences are rarely investigated. We combined individual GPS-tracked migration data from Mongolian-breeding common shelduck Tadorna tadorna and remote sensing datasets, to investigate habitat selection at inland stopover sites used by these birds during dispersed autumn migration, to explain their divergent migration patterns. We used generalized linear mixed models to investigate population-level resource selection, and generalized linear models to investigate stopover-site-level resource selection. The population-level model showed that water recurrence had the strongest positive effect on determining birds’ occupancy at staging sites, while cultivated land and grassland land cover type had strongest negative effects; effects of other land cover types were negative but weaker, particularly effects of water seasonality and presence of a human footprint, which were positive but weak or non-significant, respectively. Although stopover-site-level models showed variable resource selection patterns, the variance partitioning and cross-prediction AUC scores corroborated high inter-individual consistency in habitat selection at inland stopover sites during the dispersed autumn migration. These results suggest that the geographically widespread distribution (and generally rarity) of suitable habitats explained the spatially divergent autumn migrations of Mongolian breeding common shelduck, rather than the species showing flexible autumn staging habitat occupancy.

scholarly journals Rehabilited winter birds of Chimdi lake (Birju Tal) Sunsari, Nepal

2015 ◽  
Vol 5 (1) ◽  
pp. 58-60
Author(s):  
K. Jha ◽  
B. R. Subba
Keyword(s):  
Wetland Birds ◽  
Present Survey ◽  
Grass Land ◽  
Marsh Harrier ◽  
Initial Stage ◽  
Open Land ◽  
White Ibis ◽  
Garden Birds ◽  
Common Shelduck ◽  
Golden Plover

Chimdi lake (101.6 hect.) situated in Sunsari district is at its rehabilitating phase. Besides wetland birds several grass land, open land and garden birds also take shelter here. In the present survey altogether 60 species of bird were recorded in three months (October, November, December). Few birds like Common Shelduck, Purple Moorhen, Coot, Mallard, Eurasian Wigeon were seen to have rehabilitated whereas several species of bird such Pheasant-tailed Jacana, Ruddy Shelduck, Darter, Glossy Ibis, White Ibis, Opened Billed stork, White Necked stork, Sparrow Hawk, Dark Kite, Marsh Harrier, Golden Plover, Pheasant Tailed Jacana, Curlew, Little Egret which were recorded in the initial stage of the lake did not turn out this time. Except the population of Lesser Whistling Teal, the population other species of bird was not found increased well in spite of safe habitat and food availability.

Tadorna tadorna (Common shelduck) 2n = 80

1973 ◽  
pp. 201-203
Author(s):  
Maria Luiza Beçak ◽  
Willy Beçak ◽  
Franklin L. Roberts ◽  
Robert N. Shoffner ◽  
E. Peter Volpe
Keyword(s):  
Common Shelduck

scholarly journals Sighting of the Common Shelduck Tadorna tadorna (Linnaeus, 1758) (Aves: Anseriformes: Anatidae) in Shettikeri Tank, Karnataka, India

2018 ◽  
Vol 10 (1) ◽  
pp. 11234
Author(s):  
Darwin Dasan Tamiliniyan ◽  
Santhanakrishnan Babu ◽  
Honnavalli Nagaraj Kumara
Keyword(s):  
First Record ◽  
The State ◽  
The Common ◽  
Common Shelduck

We recorded the Common Shelduck Tadorna tadorna in Shettikeri tank and it turned out to be a first record of the species for the state Karnataka. Further, it appears like a wild vagrant to Karnataka and Southern peninsula.

scholarly journals Adults have more male-biased sex ratios than first-winter juveniles in wintering duck populations

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Kevin A. Wood ◽  
Kane Brides ◽  
Maurice E. Durham ◽  
Richard D. Hearn
Keyword(s):  
Sex Ratios ◽  
Temporal Trends ◽  
Survival Rates ◽  
Reproductive Age ◽  
Male Bias ◽  
Northern Pintail ◽  
Anas Crecca ◽  
Tufted Duck ◽  
Common Shelduck ◽  
Common Pochard

Abstract Background The long-term monitoring of demographic changes in waterbird populations remains limited, but such information can be valuable for conservationists and waterbird managers. Biased sex ratios can indicate differences in survival rates between sexes. In particular, differences in the sex ratios of fledged juveniles and adults can provide insight into the development of male bias among populations. Methods In this study, we used data from individual birds captured over a 57-year period to assess the extent, and temporal variability in male bias in nine populations of ducks wintering in the United Kingdom: Gadwall (Mareca strepera), Northern Mallard (Anas platyrhynchos), Northern Pintail (Anas acuta), Common Pochard (Aythya ferina), Common Shelduck (Tadorna tadorna), Northern Shoveler (Spatula clypeata), Eurasian Teal (Anas crecca), Tufted Duck (Aythya fuligula), and Eurasian Wigeon (Mareca penelope). Results Overall, eight of these populations were significantly male-biased and adults were more male-biased than first-winter juveniles for all nine populations. The increased male bias among adults is consistent with the hypothesis that factors such as higher mortality of reproductive-age females during the breeding season is a major cause of male bias in duck populations. However, such predation cannot explain the male bias detected in first-winter juveniles in four of the populations. The temporal trends in male bias differed between adults and first-winter juveniles in Northern Mallard, Northern Pintail, Common Pochard, Common Shelduck, Eurasian Teal, Tufted Duck, and Eurasian Wigeon. Over the study period we found increased male bias among adult Northern Mallard, Northern Pintail, Common Pochard, Common Shelduck, and Tufted Duck as well as both adult and first-winter juvenile Northern Shoveler. Conclusions We provide evidence that among wintering duck populations, sex ratios are typically male-biased, with adults exhibiting stronger male-biased sex ratios than first-winter juveniles. Improved monitoring of sex ratios of wintering waterbirds would help to increase our understanding of changes in waterbird demography, population structure, and observed population trends; our study shows that birds caught during ringing projects can be a valuable source of such data.

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