Spatial behavior and choice of habitat on migratory stopover site in European Robins (Erithacus...
-
Upload
derrick-bennington -
Category
Documents
-
view
215 -
download
1
Transcript of Spatial behavior and choice of habitat on migratory stopover site in European Robins (Erithacus...
Spatial behavior and choice of Spatial behavior and choice of habitat on migratory stopover habitat on migratory stopover
site in European Robinssite in European Robins ((Erithacus rubeculaErithacus rubecula)): : a telemetry a telemetry
studystudy
Arseny Tsvey and Arseny Tsvey and
Pavel KtitorovPavel Ktitorov
Biological Station Biological Station RybachyRybachy
Zoological InstituteZoological Institute
RussiaRussia
Objectives of the studyObjectives of the study
► Evaluation of general pattern of spatial Evaluation of general pattern of spatial behaviorbehavior
► Studying the possible difference in space Studying the possible difference in space use between spring and autumn, fat and use between spring and autumn, fat and lean individualslean individuals
► Studying of habitat use in spring and in Studying of habitat use in spring and in autumnautumn
Asia
Europe
Atlanticocean
Africa
Geographic position of the study plotGeographic position of the study plot
Study plot
Baltic sea
Lithuania
Courish spit(length – 100km
Width – 400 – 3000 m)
Courishgulf
Russia
AutumnAutumn SpringSpring
2020 1313
Number of marked birds
Robin with transmitterRobin with transmitter
antenna
Holohil Systems Ltd.
Model: LB-2
Weight: 0.46g – 0.5g
Lifespan: up 21 days
Transmitters:
Stopover duration of marked robins. Stopover duration of marked robins. Data for autumn and spring are pooled.Data for autumn and spring are pooled.
Stopover duration, days
No
of o
bs
0
2
4
6
8
10
12
14
16
18
0 1 2 3 4 5 6 7 8 9 10 11 12
Examples of movement path during the Examples of movement path during the first day of stopoverfirst day of stopover
100 mCapture/release site
Baltic Sea
Courish gulf
N
951 m
Autumn
Examples of movement path during the Examples of movement path during the first day of stopoverfirst day of stopover
100 m
Capture/release site
Baltic Sea
Courish gulf
N
512 m
Spring
Examples of movement path during the Examples of movement path during the first day of stopoverfirst day of stopover
100 m
Capture/release site
Baltic Sea
Courish gulf
N Autumn
438 m
Typical features of spatial Typical features of spatial behavior during the first day of stopoverbehavior during the first day of stopover
Stationary periodafter release
Duration of stationary period after releaze
ANOVA:Season: F(1, 28)=3.3, p=0.081
Fat: F(1, 28)=13.1, p=0.001Interaction : F(1, 28)=3. 7 , p=.065
Autumn Spring
Season
0:28
0:57
1:26
1:55
2:24
2:52
3:21
min
LEAN FAT
Typical features of spatial Typical features of spatial behavior during the first day of stopoverbehavior during the first day of stopover
Active movement duringpart of the day and
movement within temporaryhome range during the
remaining time
Active movements and movements Active movements and movements within a temporary home rangewithin a temporary home range
100 mCapture/release site
Baltic Sea
Courish gulf
N Autumn
Active movements
Temporaryhome range
Active movements and movements Active movements and movements within a temporary home rangewithin a temporary home range
100 m
Capture/release site
Baltic Sea
Courish gulf
N Spring
Active movements
Temporaryhome ranges
Active movements and movements Active movements and movements within a temporary home rangewithin a temporary home range
100 m
Capture/release site
Baltic Sea
Courish gulf
N Autumn
Active movements
Temporaryhome range
Typical features of spatial Typical features of spatial behavior during the first day of stopoverbehavior during the first day of stopover
Active movement duringpart of the day and
movement within temporaryhome range during the
remaining time
Relative time of movement within temporary home range(s)ANOVA:
Season: F(1, 28)= 0.0 2, p= 0.90Fat: F(1, 28)=0.07, p=0.80
Autumn Spring
Season
0.4
0.5
0.6
0.7
0.8
0.9
1.0
LEAN FAT
Total distance covered during the first Total distance covered during the first day of stopoverday of stopover
ANOVASeason : F(1, 28)= 4.63 , p= 0.04
Fat: F(1, 28)=4.99, p=0.034
Autumn Spring
Season
0
500
1000
1500
2000
2500
3000
tota
l dis
tanc
e, m
LEAN FAT
Total distance covered during the first Total distance covered during the first day of stopoverday of stopover
500 1000 1500 2000 2500 3000 3500 4000
Total distance of movement, m
29-Mar
3-Apr
8-Apr
13-Apr
18-Apr
23-Apr
28-Apr
3-May
8-May
dat
e o
f ca
ptu
re/r
ealis
e
b= -0.80 R 2=0.64, F(1, 10 )=61.11, p<0.01, n=1 2
Orientation of movements during the Orientation of movements during the first day of stopoverfirst day of stopover
Autumn, р<0.05 Spring, p>0.1
Spatial distribution of individual Spatial distribution of individual temporal home ranges (MCPs) during temporal home ranges (MCPs) during
autumn 2004autumn 2004
100 m
Capture/release site
Baltic Sea
Courish gulf
N
Spatial distribution of individual Spatial distribution of individual temporal home ranges (MCPs) during temporal home ranges (MCPs) during
spring 2005spring 2005
100 m
Capture/release site
Baltic Sea
Courish gulf
N
Size of temporary home range areas in Size of temporary home range areas in spring and autumn and in lean and fat spring and autumn and in lean and fat
individualsindividualsANOVA:
Season: F(1, 28)=1.28, p=0.27Fat : F(1, 28)= 0.0 5, p= 0.83
Autumn Spring
Season
0
5000
10000
15000
20000
25000
30000
35000S
ize
of
tem
po
rary
ho
me
ra
ng
es
, m
2
LEAN FAT
Lim: 2113 – 48795 m2
Mean14447 ± 12942 m2
Spatial behavior during the second and Spatial behavior during the second and subsequent days of stopoversubsequent days of stopover
AutumnAutumn SpringSpring
1010 44
100 m
Baltic Sea N Autumn
Capture/release site
An example of temporary range fidelityStopover duration – 6 days
Spatial behavior during the second and Spatial behavior during the second and subsequent days of stopoversubsequent days of stopover
AutumnAutumn SpringSpring
1010 44
100 m
Baltic Sea N Autumn
Capture/release site
An example of temporary range infidelityStopover duration – 2 days
Habitat types at the study areaHabitat types at the study area
Open dune Dune with shrubsBeachGrassGrass with shrubsYoung pine forestPine forestDeciduous forest
Baltic Sea
Courish gulf
1 km
Pine forestDeciduous forestOpen habitats
Distribution of individual home ranges Distribution of individual home ranges (MSPs) within different habitat types in (MSPs) within different habitat types in
the study area.the study area.Open dune Dune with shrubsBeachGrassGrass with shrubsYoung pine forestPine forestDeciduous forest
Baltic Sea
Courish gulf
1 km
Autumn
MCPs
Distribution of individual home ranges Distribution of individual home ranges (MSPs) within different habitat types in (MSPs) within different habitat types in
the study area.the study area.Open dune Dune with shrubsBeachGrassGrass with shrubsYoung pine forestPine forestDeciduous forest
Baltic Sea
Courish gulf
1 km
Spring
MCPs
Area of available habitats in spring and Area of available habitats in spring and autumnautumn
Open dune Dune with shrubsBeachGrassGrass with shrubsYoung pine forestPine forestDeciduous forest
Baltic Sea
Courish gulf
Spring
Autumn
Results of compositional analysis of Results of compositional analysis of habitat preference in robins on habitat preference in robins on
migratory stopovermigratory stopoverSpring
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
decidious forest pine forest open habitats
%
Available
Used
Autumn
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
decidious forest pine forest open habitats
%
Available
Used
LambdaLambda 0.870.87
χχ22 1.711.71
pp 0.430.43
Random pRandom p 0.530.53
Pine forest > deciduous forest > open Pine forest > deciduous forest > open habitatshabitats
>>> denotes a significant difference between two consecutively ranked
variables
LambdaLambda 0.610.61
χχ22 9.849.84
pp 0.0070.007
Random pRandom p 0.0070.007
deciduous forest > pine forest >>> deciduous forest > pine forest >>> open habitatsopen habitats
>>> denotes a significant difference between two consecutively ranked
variables
Biomass of invertebrates during spring Biomass of invertebrates during spring and autumn in two main habitat typesand autumn in two main habitat types
ANOVA:Season: F(1,94)=26.85, p<0.0001
Habitat type: F(1,94)=4.41, p=0.038
BIO
MA
SS
, g*w
eek
-1*(
78,5
cm
2 )-1
Spring
deciduouconifero
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
Autumn
deciduouconifero
Mean ±SE ±SD
deciduous coniferous
deciduous coniferous
R2=0.15, F (1, 53) =9.02, p=0.04
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35
Biomass of invertebrates, g*week -1 *(78,5sm 2)-1
3-Apr
8-Apr
13-Apr
18-Apr
23-Apr
28-Apr
3-May
8-May
13-May
Dat
e
Correlates of robin’s behavior with Correlates of robin’s behavior with invertebrates abundance invertebrates abundance
11 The total distance of The total distance of movement during the movement during the first day of stopover is first day of stopover is shorter in autumn than shorter in autumn than in springin spring
The biomass of The biomass of invertebrates is higher in invertebrates is higher in autumn compared with autumn compared with springspring
22 In spring the total In spring the total distance of distance of movements after movements after landing decreases with landing decreases with the progress of seasonthe progress of season
The biomass of The biomass of invertebrates increases invertebrates increases with the progress of with the progress of spring seasonspring season
3 There is no difference in use of the two main habitat types (humid deciduous forest and pine forest)
There is no difference in biomass of invertebrates between the two main habitat types (humid deci-duous forest and pine forest)
Main conclusionsMain conclusions► Movements of European robins at day time stopovers after Movements of European robins at day time stopovers after
completing migratory flights are a specific behavior, not completing migratory flights are a specific behavior, not directly related to flights themselves.directly related to flights themselves.
► The general pattern of movements of most robins during the The general pattern of movements of most robins during the first day of stopover includes active movement during a first day of stopover includes active movement during a certain period of time, and then movements within one or two certain period of time, and then movements within one or two temporary home ranges.temporary home ranges.
► Spatial behavior of robins is related to their energy status. Spatial behavior of robins is related to their energy status. Generally, fat birds are less mobile than lean ones.Generally, fat birds are less mobile than lean ones.
► Our results suggest that the general pattern of spatial Our results suggest that the general pattern of spatial behavior at stopovers depends on food abundance and behavior at stopovers depends on food abundance and availabilityavailability
Thank you very much for your attention
Acknowledgements:We are grateful to everybody who helped us with this study.Special thanks to: Casimir Bolshakov,Nicolai Poeplau, Maxim Dubinin, Jan Peyrat and Nikita Chernetsov