Variation in home-range size and movements of wintering dabbling ducks

Legagneux, Pierre; Blaize, Christine; Latraube, Franck; Gautier, Jérôme; Bretagnolle, Vincent

doi:10.1007/s10336-008-0333-7

Cited by 47 publications

(52 citation statements)

References 54 publications

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“…This corroborates earlier studies relying on radio-tracking techniques, suggesting that ducks repeatedly come back to the same roost day after day (e.g. Tamisier & Tamisier 1981, Cox & Afton 1996, Guillemain et al 2002, Legagneux et al 2009a). Another conclusion from our study is that teal are unlikely to simply have moved to surrounding marshes when they are not detected at their traditional day roost, but should rather be considered as having left the wintering quarter overall, or being dead.…”

Section: Discussionsupporting

confidence: 80%

“…To our knowledge, the fact that wintering dabbling ducks distribute themselves and partition their activities in general accordance with the functional unit principle has always been supported by studies dealing with wintering duck habitat selection (e.g. Tamisier & Tamisier 1981, Cox & Afton 1996, Duncan et al 1999, Guillemain et al 2002, Legagneux et al 2009a. However, other studies also suggest that, despite following this general pattern, some individuals may nonetheless move within their winter quarter and therefore switch between day roosts separated by distances of several kilometres (Guillemain et al 2002, Legagneux et al 2009b.…”

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confidence: 90%

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Hunting bag and distance from nearest day-roost in Camargue ducks

et al. 2008

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Reserves that are closed to hunting are important to wintering wildfowl Anatidae. Reserves can also benefit local hunters, because they are often used as day-roosts by birds prior to nocturnal feeding in surrounding wetlands. In this study, we used annual hunting bags from 45 hunting estates in the Camargue, southern France, to study the relationship between hunting success and distance to the nearest duck day-roost, which are generally located in protected areas. Five dabbling duck species Anas spp. and a diving duck species (pochard Aythya ferina) were studied. The relationship between hunting bag and distance from roost was negative in all cases except mallard Anas platyrhynchos, which is subject to specific hunting management practices (i.e. raise and release). However, a significant trend was not found for wigeon A. penelope and shoveler A. clypeata. This supports the hypothesis that hunting estates closer to protected areas are more successful. However, the decrease in hunting bags with increasing distance from the nearest roost could be seen in as little as a few thousands of metres in all species. This suggests that only hunting grounds with a distance of < 2-3 kilometres from the nearest roost may actually have increased hunting accessibility for certain duck species.

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Section: Discussionsupporting

confidence: 80%

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confidence: 90%

Hunting bag and distance from nearest day-roost in Camargue ducks

et al. 2008

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“…One of 21 individuals was found dead three days after logger deployment, but this was likely unrelated to tag attachment. Similarly, radio transmitters were glued and bound to the tail feathers of Mallard, Eurasian Teal and Northern Pintail in France by Legagneux et al [50], but no details are provided about whether or not this affected the birds. Seven out of 20 tail-mounted transmitters of 17 g in Barnacle Geese were lost prematurely in a study by Phillips et al [64], but no transmitter effects on the birds were reported.…”

Section: Other Attachment Methodsmentioning

confidence: 99%

Reduction in adverse effects of tracking devices on waterfowl requires better measuring and reporting

Lameris

Kleyheeg

2017

Anim Biotelemetry

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Since the first studies in the mid-twentieth century, lightweight electronic tracking devices have been increasingly used to study waterfowl movements. With half a century of experience and growing sample sizes, it has become clear that the attachment of a tracking device can affect a bird's behaviour and fitness. This becomes problematic when it introduces uncertainty about whether the recorded data represent natural behaviour. Waterfowl may be particularly prone to tag effects, since many species are migratory and tracking devices can disrupt their waterproof plumage. The primary aim of this paper is to identify how tracking devices may affect waterfowl survival, migration and reproduction, and how better measuring and reporting of such effects can improve our understanding of the risks, providing a first step towards reducing their impact in future studies. We reviewed literature on electronic tracking of waterfowl to create an overview of currently recognized effects of harness-attached backpacks, implants, subcutaneous attachments and neck collars. Additionally, we analysed developments in the use of attachment methods, the weight of tracking devices relative to bird body mass, and the reporting rate of effects of tracking devices in 202 original tracking studies. We found that although the number of waterfowl tracking studies described in peer-reviewed literature has steeply increased over the past decades, reporting rates of potential effects have decreased from 65.0 to 26.5%. Meanwhile, the mean weight of the tracking devices relative to the bird's body mass remained stable around 2.0%. Major negative effects were reported in 17% of all studies and were found for all attachment methods. Overall, large differences exist in the occurrence and type of negative effects between species and studies, even if the same tracking methods were used. Inconsistent reporting of effects, lack of control groups to measure effects and incomplete descriptions of the methodology hamper the identification of factors contributing to these effects. To accomplish a reduction in adverse effects of tracking, it is necessary to improve the measuring and reporting of effects. We propose a framework for standardized reporting of methods in primary tracking studies and standardized protocols to measure effects of tracking devices on waterfowl.

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“…A total of 2,144 locations in spring and 1,952 locations in winter were collected for space analysis in our study. Before analyzing the home range, data area curves were used to determine the minimum number of locations needed for per individual (Legagneux et al 2009). We tested for the effect of the number of locations on estimated size as the criterion that increased each 10 locations less than 10% increase in home range size (Odum and Kuenzler 1955).…”

Section: Study Areamentioning

confidence: 99%

Winter space use and social behaviors of Chinese Grouse (Bonasa sewerzowi) at Lianhuashan mountains, Gansu, China

2010

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Winter movement and social behavior of Chinese Grouse (Bonasa sewerzowi) were studied at Lianhuashan Natural Reserve, northwest China from 1995 to 2009. According to radio-tracking data from 25 male Chinese Grouse, their home ranges in winter ranged from 6.0 ± 1.6 ha (n = 9) to 16.0 ± 2.6 ha (n = 10). Most females and all the yearlings moved from breeding areas and formed mixed-sex flocks. However, males adopted one of three social behaviors and movement patterns, including: staying in the territory, moving to the winter flocking area, or wandering between the spring territory and the wintering area. In order to find out which factors influence male social behavior, we used multinomial logistic regression and AIC model selection to compare the habitat characteristics of male Chinese Grouse breeding territories. Modeling results indicated that food, cover, topography, and future breeding opportunity were the main variables determining social behavior in winter. KeywordsBonasa sewerzowi Á Social behaviors Á Non-breeding season Á Trade-off Á Qinghai-Tibetan plateau Zusammenfassung Winterbewegungen und Sozialverhalten von Schwarzbrust-Haselhühnern (Bonasa sewerzowi) wurden im Lianhuashan-Naturschutzgebiet in Nordwestchina von 1995 bis 2008 untersucht. Den Radiotelemetriedaten von 25 männlichen Schwarzbrust-Haselhühnern zufolge reichten ihre Streifgebiete im Winter von 6,04 ± 1,60 ha (n = 9) bis 15,98 ± 2,61 ha (n = 10). Die meisten Weibchen sowie alle Jährlinge entfernten sich von den Brutgebieten und bildeten gemischtgeschlechtliche Schwärme. Bei Männchen ließen sich jedoch drei verschiedene soziale Verhaltensweisen und Bewegungsmuster beobachten, nämlich Verbleiben im Territorium, Wegzug ins Winterschwarmgebiet und Wechseln zwischen dem Frühjahrsterritorium und dem Ü berwinterungsgebiet. Um herauszufinden, welche Faktoren das Sozialverhalten von Männchen beeinflussen, haben wir zum Vergleich der Habitateigenschaften der Brutreviere männlicher Schwarzbrust-Haselhühner multinomiale logistische Regression und AIC-Modellselektion angewendet. Die Modellierungsergebnisse deuteten darauf hin, dass Nahrung, Deckung, Topographie und zukünftige Brutgelegenheiten die Hauptvariablen waren, die das Sozialverhalten im Winter bestimmten.

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Variation in home-range size and movements of wintering dabbling ducks

Cited by 47 publications

References 54 publications

Hunting bag and distance from nearest day-roost in Camargue ducks

Hunting bag and distance from nearest day-roost in Camargue ducks

Reduction in adverse effects of tracking devices on waterfowl requires better measuring and reporting

Winter space use and social behaviors of Chinese Grouse (Bonasa sewerzowi) at Lianhuashan mountains, Gansu, China

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