Master proposal
Topic
Do predator recognition and alarm call
properties vary with latitude in lapwings (Vanellus spp.) ?
Supervising team
Guillaume Dillenseger, MSc
Miguel Monteiro, PhD
Malavika Madhavan, MSc
Department of Zoology and Centre for Polar
Ecology, Faculty of Science
Location
University of South Bohemia, Branišovská 1760,
České Budějovice, 37005, Czech Republic
Period
January/February – May/June 2025
Deadline for application
5th of October 2024
Interested applicants should send their CV with
picture and a cover letter (max 2 pages) in English at guillaume.dillenseger@orange.fr
Rationale
Mobbing is a common anti-predatory behaviour
among prey species, during which one or more individuals will harass a
predator, and often call (Carlson
& Griesser, 2022). This behaviour is costly, with
both risks for the harasser and the harassed. It is expected that the intensity
of mobbing will differ both at a local scale; regarding both individual (e.g.,
species, personality, individual experience) and environmental factors (e.g.,
predator guild, conspecific presence) (Vrublevska et al., 2015;
Brynychová et al., 2022). But at a more global scale,
predation rates are known to decrease towards higher latitudes (McKinnon
et al., 2010; Kubelka et al., 2018). This could lead to various level
of mobbing intensity between populations facing different predation pressure
levels. While some suggested that aggressiveness should follow predation
gradient (Larsen
et al., 1996), others expected individuals to
invest more in antipredatory defences when predation was reduced (Zhang
et al., 2020). An important part of mobbing is
the emission of alarm or mobbing calls, that could serve to deter predators or
to inform other prey species. For instance, it is known that alarm calls varied
based on the faced predator, and influenced conspecifics’ behaviour (Zuberbühler et al., 1997; Igic & Magrath, 2014). However, it remains unknown if
populations suffering from different predation risk vary in their call
properties and identities when encountering a predator.
Here, we want to investigate how conspecific
populations at various latitudes adjust their antipredatory response, with a
particular emphasis on vocal behaviour during mobbing interactions. We are
looking to see if aggressiveness evolves with increasing latitude across
several European populations and local predation risk. Additionally, we want to
know if mobbing calls may vary between different predator guilds and latitudes.
Question
Do individuals at lower latitudes call more
when exposed to predators?
Do alarm calls vary when facing different
predator guilds?
Do individuals produce more distinct calls when
facing different predators at locations with higher predation rate?
Tasks
The student will collect behavioral and
acoustic data on Northern Lapwing (Vanellus vanellus) from the field at
different locations across Europe: Italy (Emilia-Romagna region), Estonia and
Finland (Northern Ostrobothnia region). The travel and stay costs for the field
will be entirely covered. The student will take part in an already established
project and will participate in dummy experiments, from which he/she will
extract data for the thesis and a publication is expected at the end of the
internship. Part of the data was already collected in 2024 and can be used for
the analysis. Additional data on Southern Lapwing (V. chilensis) has
also been collected and could be used in the analysis if desired. The data
analyses will incorporate analysis of the sound properties of vocalizations
(use RavenPro, Audacity, etc.) and statistics (R). The selected student will be
highly involved in fieldwork activities, and will work with several people of
different nationalities: a proficiency in English is expected.
Profile
We are looking for a highly-motivated Master 1/2
student in ecology, zoology or ethology program with:
-strong willingness to participate in the
field, and good physical conditions
-high proficiency in English
-proficiency in other languages is not expected
but can be useful when interacting with fieldworkers/farmers (Italian,
Estonian, Portuguese, Finnish, French are spoken by some field leaders)
-basis statistical knowledge and use of R
software
-basis knowledge in bio-acoustic is a plus
-good ornithological knowledge is a plus
-previous experience in bird manipulation is a
plus
-willingness to publish a paper or at least
participate in the publication process
References
Brynychová, K., Sládeček, M., Pešková,
L., Chajma, P., Firlová, V., Elhassan, E., Vozabulová, E., Janatová, V.,
Almuhery, A., & Šálek, M. (2022). Aggressiveness in a subtropical shorebird’s nest defense is adjusted to
the predator species and shared by conspecifics. Aggressive Behavior, n/a(n/a).
https://doi.org/10.1002/ab.22032
Carlson,
N. V., & Griesser, M. (2022). Mobbing in animals: A thorough review and
proposed future directions. In S. Healy & J. Podos (Eds.), Advances in
the Study of Behavior (Vol. 54, pp. 1–41). Academic Press.
https://doi.org/10.1016/bs.asb.2022.01.003
Igic,
B., & Magrath, R. D. (2014). A songbird mimics different heterospecific
alarm calls in response to different types of threat. Behavioral Ecology,
25(3), 538–548. https://doi.org/10.1093/beheco/aru018
Kubelka,
V., Šálek, M., Tomkovich, P., Végvári, Z., Freckleton, R. P., & Székely, T.
(2018). Global pattern of nest predation is disrupted by climate change in
shorebirds. Science, 362(6415), 680–683.
https://doi.org/10.1126/science.aat8695
Larsen,
T., Sordahl, T. A., & Byrkjedal, I. (1996). Factors related to aggressive
nest protection behaviour: a comparative study of Holarctic waders. Biological
Journal of the Linnean Society, 58(4), 409–439.
https://doi.org/10.1111/j.1095-8312.1996.tb01444.x
McKinnon,
L., Smith, P. A., Nol, E., Martin, J. L., Doyle, F. I., Abraham, K. F.,
Gilchrist, H. G., Morrison, R. I. G., & Bêty, J. (2010). Lower predation
risk for migratory birds at high latitudes. Science, 327, 326–327.
https://doi.org/10.1126/science.1183010
Vrublevska,
J., Krama, T., Rantala, M. J., Mierauskas, P., Freeberg, T. M., & Krams, I.
A. (2015). Personality and density affect nest defence and nest survival in the
great tit. Acta Ethologica, 18(2), 111–120.
https://doi.org/10.1007/s10211-014-0191-7
Zhang,
L., Liu, J., Zhang, H., Wan, D., Liang, W., & Møller, A. P. (2020). Fight
or flight: geographic variation in antipredator defenses by cinereous tits. Global
Ecology and Conservation, 24, e01207.
https://doi.org/10.1016/j.gecco.2020.e01207
Zuberbühler,
K., Noë, R., & Seyfarth, R. M. (1997). Diana monkey long-distance calls:
messages for conspecifics and predators. Animal Behaviour, 53(3), 589–604. https://doi.org/10.1006/anbe.1996.0334