TY  - JOUR
AU  - Bjelica, Vukašin
AU  - Anđelković, Marko
AU  - Maričić, Marko
AU  - Tomović, Ljiljana
AU  - Bonnet, Xavier
AU  - Golubović, Ana
PY  - 2024
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/6756
AB  - When captured, many prey respond by biting the predator or struggling to get free.
However, one indirect escape option is death feigning (DF), in which complete
immobility supposedly “tricks” the predator into abandoning its meal. But lying
motionless and exposed to a predator is dangerous; therefore, individuals should
optimize DF occurrence and duration. We captured colour polymorphic dice snakes
(Natrix tessellata, Natricidae) (N = 271) in the field and measured two behavioural
responses: (1) the occurrence and duration of immobility/DF; (2) the number of
tongue-flicking sequences (TF). Tongue flicking is an essential component of a key
sensory mechanism to check the safety of the environment before attempting
escape. We experimentally assessed the relationship between these two behaviours
and the effects of phenotypic characteristic of snakes on the occurrence and duration
of immobility and of TF. Snake phenotype had multiple effects. Gravid
females avoided DF and displayed more TF sequences during the tests compared
to non-gravid females and males. Blotched snakes stayed immobile longer than
green and melanistic snakes. Larger individuals remained in DF for longer and
showed fewer TF sequences than smaller individuals. Snakes burdened with a
recent meal postponed fleeing and displayed more TF sequences than snakes without
food. Finally, snakes showing more TF sequences postponed fleeing, which
suggests that dice snakes assessed predatory risks and adapted escape behaviour to
their risk status. Future studies should examine how individuals estimate the appropriate
timing to shift from immobility to escape.
PB  - Hoboken: Wiley
T2  - Journal of Zoology
T1  - Tongue flicking heralds flight behaviour following passive antipredator displays in dice snakes
IS  - 4
VL  - 322
DO  - 10.1111/jzo.13150
SP  - 364
EP  - 374
ER  - 

@article{
author = "Bjelica, Vukašin and Anđelković, Marko and Maričić, Marko and Tomović, Ljiljana and Bonnet, Xavier and Golubović, Ana",
year = "2024",
abstract = "When captured, many prey respond by biting the predator or struggling to get free.
However, one indirect escape option is death feigning (DF), in which complete
immobility supposedly “tricks” the predator into abandoning its meal. But lying
motionless and exposed to a predator is dangerous; therefore, individuals should
optimize DF occurrence and duration. We captured colour polymorphic dice snakes
(Natrix tessellata, Natricidae) (N = 271) in the field and measured two behavioural
responses: (1) the occurrence and duration of immobility/DF; (2) the number of
tongue-flicking sequences (TF). Tongue flicking is an essential component of a key
sensory mechanism to check the safety of the environment before attempting
escape. We experimentally assessed the relationship between these two behaviours
and the effects of phenotypic characteristic of snakes on the occurrence and duration
of immobility and of TF. Snake phenotype had multiple effects. Gravid
females avoided DF and displayed more TF sequences during the tests compared
to non-gravid females and males. Blotched snakes stayed immobile longer than
green and melanistic snakes. Larger individuals remained in DF for longer and
showed fewer TF sequences than smaller individuals. Snakes burdened with a
recent meal postponed fleeing and displayed more TF sequences than snakes without
food. Finally, snakes showing more TF sequences postponed fleeing, which
suggests that dice snakes assessed predatory risks and adapted escape behaviour to
their risk status. Future studies should examine how individuals estimate the appropriate
timing to shift from immobility to escape.",
publisher = "Hoboken: Wiley",
journal = "Journal of Zoology",
title = "Tongue flicking heralds flight behaviour following passive antipredator displays in dice snakes",
number = "4",
volume = "322",
doi = "10.1111/jzo.13150",
pages = "364-374"
}

Bjelica, V., Anđelković, M., Maričić, M., Tomović, L., Bonnet, X.,& Golubović, A.. (2024). Tongue flicking heralds flight behaviour following passive antipredator displays in dice snakes. in Journal of Zoology
Hoboken: Wiley., 322(4), 364-374.
https://doi.org/10.1111/jzo.13150

Bjelica V, Anđelković M, Maričić M, Tomović L, Bonnet X, Golubović A. Tongue flicking heralds flight behaviour following passive antipredator displays in dice snakes. in Journal of Zoology. 2024;322(4):364-374.
doi:10.1111/jzo.13150 .

Bjelica, Vukašin, Anđelković, Marko, Maričić, Marko, Tomović, Ljiljana, Bonnet, Xavier, Golubović, Ana, "Tongue flicking heralds flight behaviour following passive antipredator displays in dice snakes" in Journal of Zoology, 322, no. 4 (2024):364-374,
https://doi.org/10.1111/jzo.13150 . .

TY  - JOUR
AU  - Krizmanić, Imre
AU  - Urošević, Aleksandar
AU  - Simović, Aleksandar
AU  - Krstić, Milivoj
AU  - Jović, Danko
AU  - Ajtić, Rastko D.
AU  - Anđelković, Marko
AU  - Ajduković, Maja
AU  - Đorđević, Sonja
AU  - Golubović, Ana
AU  - Žikić, Vladimir
AU  - Džukić, Georg V.
PY  - 2015
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/2035
AB  - Although the European pond turtle (Emys orbicularis) has been included
   in studies for several decades, the information about its distribution
   and the state of populations in Serbia is still incomplete. The data
   collected from the available literature sources, and those based on the
   authors' own field investigations, indicate that E. orbicularis occupies
   a large part of the territory of the Republic of Serbia, preferring
   aquatic biotopes at lower altitudes. We compiled a list of 287
   localities where the presence of the pond turtle has been recorded. Of
   those, 14\% (40 localities) were known only from literature sources,
   localities added during our field investigations represent 82\% (235
   sites), 4\% (12 localities) confirming literature data. We also gathered
   information on the main negative threats to the endurance of the pond
   turtle in Serbia. These are habitat pollution, degradation and
   destruction, and the spread of allochthonous invasive turtle species.
   Some protective and conservation measures are suggested in the
   conclusion.
T2  - Archives of Biological Sciences
T1  - Updated distribution of the European pond turtle Emys orbicularis (Linnaeus, 1758) and its conservation issues in Serbia
IS  - 3
VL  - 67
DO  - 10.2298/ABS150210067K
SP  - 1043
EP  - 1053
ER  - 

@article{
author = "Krizmanić, Imre and Urošević, Aleksandar and Simović, Aleksandar and Krstić, Milivoj and Jović, Danko and Ajtić, Rastko D. and Anđelković, Marko and Ajduković, Maja and Đorđević, Sonja and Golubović, Ana and Žikić, Vladimir and Džukić, Georg V.",
year = "2015",
abstract = "Although the European pond turtle (Emys orbicularis) has been included
   in studies for several decades, the information about its distribution
   and the state of populations in Serbia is still incomplete. The data
   collected from the available literature sources, and those based on the
   authors' own field investigations, indicate that E. orbicularis occupies
   a large part of the territory of the Republic of Serbia, preferring
   aquatic biotopes at lower altitudes. We compiled a list of 287
   localities where the presence of the pond turtle has been recorded. Of
   those, 14\% (40 localities) were known only from literature sources,
   localities added during our field investigations represent 82\% (235
   sites), 4\% (12 localities) confirming literature data. We also gathered
   information on the main negative threats to the endurance of the pond
   turtle in Serbia. These are habitat pollution, degradation and
   destruction, and the spread of allochthonous invasive turtle species.
   Some protective and conservation measures are suggested in the
   conclusion.",
journal = "Archives of Biological Sciences",
title = "Updated distribution of the European pond turtle Emys orbicularis (Linnaeus, 1758) and its conservation issues in Serbia",
number = "3",
volume = "67",
doi = "10.2298/ABS150210067K",
pages = "1043-1053"
}

Krizmanić, I., Urošević, A., Simović, A., Krstić, M., Jović, D., Ajtić, R. D., Anđelković, M., Ajduković, M., Đorđević, S., Golubović, A., Žikić, V.,& Džukić, G. V.. (2015). Updated distribution of the European pond turtle Emys orbicularis (Linnaeus, 1758) and its conservation issues in Serbia. in Archives of Biological Sciences, 67(3), 1043-1053.
https://doi.org/10.2298/ABS150210067K

Krizmanić I, Urošević A, Simović A, Krstić M, Jović D, Ajtić RD, Anđelković M, Ajduković M, Đorđević S, Golubović A, Žikić V, Džukić GV. Updated distribution of the European pond turtle Emys orbicularis (Linnaeus, 1758) and its conservation issues in Serbia. in Archives of Biological Sciences. 2015;67(3):1043-1053.
doi:10.2298/ABS150210067K .

Krizmanić, Imre, Urošević, Aleksandar, Simović, Aleksandar, Krstić, Milivoj, Jović, Danko, Ajtić, Rastko D., Anđelković, Marko, Ajduković, Maja, Đorđević, Sonja, Golubović, Ana, Žikić, Vladimir, Džukić, Georg V., "Updated distribution of the European pond turtle Emys orbicularis (Linnaeus, 1758) and its conservation issues in Serbia" in Archives of Biological Sciences, 67, no. 3 (2015):1043-1053,
https://doi.org/10.2298/ABS150210067K . .

TY  - JOUR
AU  - Golubovic, Ana
AU  - Tomovic, Ljiljana
AU  - Ivanovic, Ana
PY  - 2015
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/2081
AB  - Armoured animals can easily lose their balance and fall on their back.
   When overturned, they can be exposed to suboptimal environment
   conditions, starvation or predation, thus, self-righting has a vital
   importance. Chelonians' stiff shells prevent torsion of the torso, thus
   influence of the dorsum shape on self-righting can be significant. We
   explored the relationship between duration of active self-righting
   attempts and shell geometry in Hermann's tortoises. We used geometric
   morphometrics and shell shape indices (R index, sphericity and flatness
   indices) to explore this effect. Our results showed a negative
   relationship between size and righting performance in both females and
   males. Enlarged females' body, and thus reduced agility, could be
   favoured by fecundity selection. On the other hand, the body size of
   males is probably affected by sexual selection. Additionally, enlarged
   flared rear marginal scutes in males negatively affect self-righting.
   This part of males' shells could be shaped by the trade-off between
   self-righting and stability during courtship and mating. However, the
   relationship between carapace shape and righting performance is not
   straightforward, as different results were obtained when various shape
   indices were applied in the analyses. The indices imply that greater
   curvature of the carapace shape facilitates self-righting in Hermann's
   tortoises. Comparison of available literature data and results of this
   study imply that shell shape across the Testudo genus, except for T.
   marginata, largely overlaps with shell shape of T. hermanni. Thus, a
   similar effect of shell shape on self-righting performance could be
   expected for most of Testudo species. (C) 2014 Elsevier GmbH. All rights
   reserved.
T2  - Zoologischer Anzeiger
T1  - Geometry of self righting: the case of Hermann's tortoises
VL  - 254
DO  - 10.1016/j.jcz.2014.12.003
SP  - 99
EP  - 105
ER  - 

@article{
author = "Golubovic, Ana and Tomovic, Ljiljana and Ivanovic, Ana",
year = "2015",
abstract = "Armoured animals can easily lose their balance and fall on their back.
   When overturned, they can be exposed to suboptimal environment
   conditions, starvation or predation, thus, self-righting has a vital
   importance. Chelonians' stiff shells prevent torsion of the torso, thus
   influence of the dorsum shape on self-righting can be significant. We
   explored the relationship between duration of active self-righting
   attempts and shell geometry in Hermann's tortoises. We used geometric
   morphometrics and shell shape indices (R index, sphericity and flatness
   indices) to explore this effect. Our results showed a negative
   relationship between size and righting performance in both females and
   males. Enlarged females' body, and thus reduced agility, could be
   favoured by fecundity selection. On the other hand, the body size of
   males is probably affected by sexual selection. Additionally, enlarged
   flared rear marginal scutes in males negatively affect self-righting.
   This part of males' shells could be shaped by the trade-off between
   self-righting and stability during courtship and mating. However, the
   relationship between carapace shape and righting performance is not
   straightforward, as different results were obtained when various shape
   indices were applied in the analyses. The indices imply that greater
   curvature of the carapace shape facilitates self-righting in Hermann's
   tortoises. Comparison of available literature data and results of this
   study imply that shell shape across the Testudo genus, except for T.
   marginata, largely overlaps with shell shape of T. hermanni. Thus, a
   similar effect of shell shape on self-righting performance could be
   expected for most of Testudo species. (C) 2014 Elsevier GmbH. All rights
   reserved.",
journal = "Zoologischer Anzeiger",
title = "Geometry of self righting: the case of Hermann's tortoises",
volume = "254",
doi = "10.1016/j.jcz.2014.12.003",
pages = "99-105"
}

Golubovic, A., Tomovic, L.,& Ivanovic, A.. (2015). Geometry of self righting: the case of Hermann's tortoises. in Zoologischer Anzeiger, 254, 99-105.
https://doi.org/10.1016/j.jcz.2014.12.003

Golubovic A, Tomovic L, Ivanovic A. Geometry of self righting: the case of Hermann's tortoises. in Zoologischer Anzeiger. 2015;254:99-105.
doi:10.1016/j.jcz.2014.12.003 .

Golubovic, Ana, Tomovic, Ljiljana, Ivanovic, Ana, "Geometry of self righting: the case of Hermann's tortoises" in Zoologischer Anzeiger, 254 (2015):99-105,
https://doi.org/10.1016/j.jcz.2014.12.003 . .

TY  - JOUR
AU  - Golubovic, Ana
AU  - Anđelković, Marko
AU  - Arsovski, Dragan
AU  - Vujovic, Ana
AU  - Ikovic, Vuk
AU  - Djordjevic, Sonja
AU  - Tomovic, Ljiljana
PY  - 2014
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/2154
AB  - Dense vegetation cover undoubtedly offers certain advantages for small
   and slow-moving animals, but its disadvantages concerning some aspects
   of spatial ecology (e.g. movements) were neglected in previous studies.
   Tortoises could get stuck in vegetation by protuberant part of the shell
   and thus succumb to overheating, dehydration or predators. To examine
   how vegetation cover shapes behavioural responses of `trapped'
   tortoises, we tested adults of six populations from habitats with
   contrasting vegetation cover. The tortoises were fitted with a
   non-stretchable rope, representing a piece of vegetation, stuck on the
   protruding front part of the plastron. Results suggested the existence
   of two distinct releasing techniques. First, and only successful in this
   study, is frequent changing of the movement direction, with a minimal
   pulling force, until the obstacle detached. The other involved the
   maximal pulling force aimed at ripping out the constraint. Tortoises
   from shrub habitats had more releasing success, used less pulling force
   and needed shorter time period to release, contrary to tortoises from
   herbaceous habitats. Although sexes showed similar releasing success,
   females obtained lower number of direction changes and higher yanking
   force compared to males, suggesting slightly different liberating
   strategies between the sexes. For immobilized tortoises without suitable
   shelter from overheating and dehydration, appropriate behavioural
   response could be vital, especially during drought years, due to
   increased physiological stresses. Variability of behavioural patterns
   among tortoise populations, described in this study, could have an
   adaptive significance.
T2  - Acta Ethologica
T1  - Skills or strength-how tortoises cope with dense vegetation?
IS  - 3
VL  - 17
DO  - 10.1007/s10211-013-0171-3
SP  - 141
EP  - 147
ER  - 

@article{
author = "Golubovic, Ana and Anđelković, Marko and Arsovski, Dragan and Vujovic, Ana and Ikovic, Vuk and Djordjevic, Sonja and Tomovic, Ljiljana",
year = "2014",
abstract = "Dense vegetation cover undoubtedly offers certain advantages for small
   and slow-moving animals, but its disadvantages concerning some aspects
   of spatial ecology (e.g. movements) were neglected in previous studies.
   Tortoises could get stuck in vegetation by protuberant part of the shell
   and thus succumb to overheating, dehydration or predators. To examine
   how vegetation cover shapes behavioural responses of `trapped'
   tortoises, we tested adults of six populations from habitats with
   contrasting vegetation cover. The tortoises were fitted with a
   non-stretchable rope, representing a piece of vegetation, stuck on the
   protruding front part of the plastron. Results suggested the existence
   of two distinct releasing techniques. First, and only successful in this
   study, is frequent changing of the movement direction, with a minimal
   pulling force, until the obstacle detached. The other involved the
   maximal pulling force aimed at ripping out the constraint. Tortoises
   from shrub habitats had more releasing success, used less pulling force
   and needed shorter time period to release, contrary to tortoises from
   herbaceous habitats. Although sexes showed similar releasing success,
   females obtained lower number of direction changes and higher yanking
   force compared to males, suggesting slightly different liberating
   strategies between the sexes. For immobilized tortoises without suitable
   shelter from overheating and dehydration, appropriate behavioural
   response could be vital, especially during drought years, due to
   increased physiological stresses. Variability of behavioural patterns
   among tortoise populations, described in this study, could have an
   adaptive significance.",
journal = "Acta Ethologica",
title = "Skills or strength-how tortoises cope with dense vegetation?",
number = "3",
volume = "17",
doi = "10.1007/s10211-013-0171-3",
pages = "141-147"
}

Golubovic, A., Anđelković, M., Arsovski, D., Vujovic, A., Ikovic, V., Djordjevic, S.,& Tomovic, L.. (2014). Skills or strength-how tortoises cope with dense vegetation?. in Acta Ethologica, 17(3), 141-147.
https://doi.org/10.1007/s10211-013-0171-3

Golubovic A, Anđelković M, Arsovski D, Vujovic A, Ikovic V, Djordjevic S, Tomovic L. Skills or strength-how tortoises cope with dense vegetation?. in Acta Ethologica. 2014;17(3):141-147.
doi:10.1007/s10211-013-0171-3 .

Golubovic, Ana, Anđelković, Marko, Arsovski, Dragan, Vujovic, Ana, Ikovic, Vuk, Djordjevic, Sonja, Tomovic, Ljiljana, "Skills or strength-how tortoises cope with dense vegetation?" in Acta Ethologica, 17, no. 3 (2014):141-147,
https://doi.org/10.1007/s10211-013-0171-3 . .