Guillaume SouchayOffice Français de la Biodiversité · Direction de la Recherche et de l'Appui Scientifique
Guillaume Souchay
Ph.D in Ecology
About
35
Publications
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222
Citations
Introduction
I am currently working at the French National Agency for Widlife, studying population dynamics of residents game species such as partridges, common pheasants, hares and cottontail rabits.
My research interests are related to population dynamics and evolution of life-history traits.
To date, I have been working on birds (flamingos, goose, penguins, lapwings and hoopoes), either on fundamental or more applicated topics.
Additional affiliations
August 2009 - March 2013
November 2013 - February 2015
Position
- PostDoc Position
Description
- - Impact of hunting on several European breeding population of Northern lapwings - Effect of geolocator on survival in Hoopoes - Investigating carry-over effects in Hoopoes
March 2015 - January 2018
Education
August 2009 - March 2013
May 2009 - March 2013
September 2007 - September 2008
Publications
Publications (35)
1. To document and halt biodiversity loss, monitoring, quantifying trends and assessing management and conservation strategies on wildlife populations and communities are crucial steps. 2. With increasing technological innovations, more and more data are collected and new quantitative methods are constantly developed. These rapid developments come...
There is growing evidence that the Earth's climate is undergoing profound changes that are affecting biodiversity worldwide. This gives rise to the pressing need to develop robust predictions on how species will respond in order to inform conservation strategies and allow managers to adapt mitigation measures accordingly. While predictions have beg...
Thanks to the Pan-European Common Birds Monitoring Scheme and Breeding Bird Survey, the temporal changes in abundance of the Red-legged Partridge are known in most countries of its area of distribution. However, these are based on abundance indices and no strong inference is possible about potential causes of local trends. Robust estimates of abund...
Predation is one of the most important interspecific relationships, structuring the functioning of ecosystems. Several trophic levels are involved, and any change at any level can have critical issues for other species. In particular, any change in small mammals can have detrimental effect for birds and mammals on the same trophic levels or above....
Assessing trends in the relative abundance of populations is a key yet complex issue for management and conservation. This is a major aim of many large‐scale censusing schemes such as the International Waterbird Count (IWC). However, owing to the lack of sampling strategy and standardization, such schemes likely suffer from biases due to spatial he...
In Western Europe, Common pochard populations have experienced a sharp decline over the last two decades, together with an increasing proportion of males. Both of these changes were suggested to result from decreasing survival of nesting females (i.e., survival of adult females) owing to increasing predation pressure. To test this hypothesis, we us...
Migratory birds have a narrow time window to breed, especially in the Arctic, where early nesting typically yields the highest reproductive success. We assessed temporal changes (1991–2015) in reproductive success components in relation to timing of breeding in greater snow geese ( Chen caerulescens atlantica ). This species breeds in the Canadian...
Understanding demographical processes underlying abundance and population size fluctuations is critical to species management. Knowing key parameters and responses to observed changes can reduce the number of realistic management scenarios. In hunted species, survival might be the targeted parameter for effective plans. The red-legged partridge (Al...
The viability and dynamics of spatially structured populations depend critically upon dispersal behaviour. Yet, in long lived species with delayed maturity, the fitness consequences of post-fledging dispersal, dispersal from the birthplace after independence and before first breeding attempt, are poorly understood although it is a critical determin...
La question de l'impact réel de la prédation sur les populations de petit gibier reste largement débattue, aussi bien dans la communauté scientifique que parmi les gestionnaires de la nature. Mais comment distinguer l'effet de la prédation des autres facteurs (habitat, météorologie, etc.) ? Le renard est suspecté d'être le prédateur ayant l'impact...
Understanding effects of harvest on population dynamics is of major interest, especially for declining species. European lapwing Vanellus vanellus populations increased from the 1960s until the 1980s and declined strongly thereafter. About 400,000 lapwings are harvested annually and it is thus of high conservation relevance to assess whether huntin...
Implementation of the multievent cause-specific mortality model in E-SURGE.
We provided the full procedure to implement this model in program E-SURGE.
(PDF)
On the use of recoveries with unknown source of death in the standard cause-specific mortality model.
Comparison of mean and standard errors survival and proportion of death due to hunting between the multievent cause-specific mortality model and the standard cause-specific mortality model [16] where recoveries with unknown cause of death where eit...
Comparison of parameter estimates obtained from the multievent cause-specific mortality model and a multievent Seber model.
(PDF)
List of ringing schemes that provided the ringing and recovery data.
Includes a table summarizing origin of ringing data and a figure illustrating locations of recoveries by area of ringing.
(PDF)
Multievent Seber model.
Brief description of the model used to estimate survival and recovery probabilities while taking into account uncertainty in the recovery process.
(PDF)
Comparison of kill rates computed from different values of reporting and retrieval rates.
(PDF)
Dataset.
Encounter histories of ringed lapwings formatted for the multievent cause-specific mortality model adopted in our study. Lapwings were ringed from 1960 to 2010 in Denmark, Finland, Germany, Great-Britain, Netherlands, Norway and Sweden.
(TXT)
Review of reporting rates and crippling loss rates of Mourning doves.
Tables summarizing reporting rates and crippling loss rates of Mourning doves from the literature.
(PDF)
Point estimates (± SE) of several demographic parameters for lapwing populations from 1960 to 2010.
(PDF)
The survival of captive-bred individuals from release into the wild to their first breeding season is crucial to assess the success of reintroduction or translocation programmes, and to assess their potential impact of wild populations. However, assessing the survival of captive-bred individuals following their release is often complicated by immed...
The consequences of releasing captive-bred game animals into the wild have received little attention, despite their potential demographic impact, as well as costs and/or benefits for recipient populations. If restocking aims at increasing harvest opportunities, increased hunting pressure is expected, which would then be supported by either wild or...
Tracking devices are used in a broad range of species for a broad range of questions, but their potential effects on study species are debated. Outcomes of earlier studies on effects are equivocal; some studies find negative effects on behaviour and life history traits, while others do not. Contrasting results might be due to low sample sizes, temp...
According to life-history theory, individuals are expected to maximize their number of offspring while minimizing costs on their survival. In long-lived species, breeding season usually occurs once a year and mature individuals can therefore breed every year. However, several strategies are found among these species, breeding attempts regularly occ...
Adaptive management of harvested waterfowl requires accurate estimations of demographic parameters. These must also be representative of the targeted population. In the greater snow goose , all demographic parameters have been so far estimated from long-term banding conducted at a single nesting colony in the Arctic, Bylot Island, where 15% of the...
Breeding propensity, i.e. the probability that a mature female attempts to breed in a given year, is a critical demographic parameter in long-lived species. Life-history theory predicts that this trait should be affected by reproductive trade-offs so that the probability of future reproduction should depend on the current reproductive investment. H...
We assessed spatial and temporal variation in reporting probability of banded greater snow geese (Chen caerulescens atlantica) shot by hunters in eastern North America and evaluated potential residual biases in kill rate estimation. Adult greater snow geese were marked with reward (value: US$10, $20, $30, $50 and $100) and standard bands ($0, contr...
Studies of population dynamics of long-lived species have generally focused on adult survival because population growth should be most sensitive to this parameter. However, actual variations in population size can often be driven by other demographic parameters, such as juvenile survival, when they show high temporal variability. We used capture-re...
In long-lived species, an inverse relationship apparently exists between variability of demographic parameters and their elasticity (i.e. the relative contribution of a given parameter to the population growth rate). The environmental canalization theory has been proposed to explain such a relationship. Demographic parameters with the highest elast...
Questions
Questions (3)
Hi,
I am working at the French National Hunting and Wildlife Agency on modeling population of small game species in France (I have a current project to build an IPM for red-legged partridges) and I was wondering whether some of you would be present at the next conference of the international union of game biologists that will be hold in Montpellier at the end of August 2017 (http://iugb2017.com/ - Byron Williams and Jean-Dominique Lebreton will give plenary talks).
I would be very interested to exchange with you about some difficulties we encounter in France.
Cheers,
Guillaume
