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Hopping Down the Main Street: Eastern Grey Kangaroos at Home in an Urban Matrix.

Coulson G, Cripps JK, Wilson ME - Animals (Basel) (2014)

Bottom Line: Vehicles were the major (47%) cause of mortality of tagged adults.Road-kills were concentrated (74%) in autumn and winter, and were heavily male biased: half of all tagged males died on roads compared with only 20% of tagged females.We predict that this novel and potent mortality factor will have profound, long-term impacts on the demography and behavior of the urban kangaroo population at Anglesea.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, The University of Melbourne, Parkville, VIC 3010, Australia. gcoulson@unimelb.edu.au.

ABSTRACT
Most urban mammals are small. However, one of the largest marsupials, the Eastern Grey Kangaroo Macropus giganteus, occurs in some urban areas. In 2007, we embarked on a longitudinal study of this species in the seaside town of Anglesea in southern Victoria, Australia. We have captured and tagged 360 individuals to date, fitting each adult with a collar displaying its name. We have monitored survival, reproduction and movements by resighting, recapture and radio-tracking, augmented by citizen science reports of collared individuals. Kangaroos occurred throughout the town, but the golf course formed the nucleus of this urban population. The course supported a high density of kangaroos (2-5/ha), and approximately half of them were tagged. Total counts of kangaroos on the golf course were highest in summer, at the peak of the mating season, and lowest in winter, when many males but not females left the course. Almost all tagged adult females were sedentary, using only part of the golf course and adjacent native vegetation and residential blocks. In contrast, during the non-mating season (autumn and winter), many tagged adult males ranged widely across the town in a mix of native vegetation remnants, recreation reserves, vacant blocks, commercial properties and residential gardens. Annual fecundity of tagged females was generally high (≥70%), but survival of tagged juveniles was low (54%). We could not determine the cause of death of most juveniles. Vehicles were the major (47%) cause of mortality of tagged adults. Road-kills were concentrated (74%) in autumn and winter, and were heavily male biased: half of all tagged males died on roads compared with only 20% of tagged females. We predict that this novel and potent mortality factor will have profound, long-term impacts on the demography and behavior of the urban kangaroo population at Anglesea.

No MeSH data available.


Related in: MedlinePlus

Mean attendance rate of individual male and female Eastern Grey Kangaroos Macropus giganteus (tagged as adults) in autumn/winter and spring/summer on the Anglesea golf course from May 2008 to November 2013. Data from censuses recording ≥50 tagged adults (8 autumn/winter and 16 spring/summer), from the first census after each individual was tagged to the last in which it was known to be alive, excluding individuals spanning <10 censuses. Error bars show standard error.
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animals-04-00272-f004: Mean attendance rate of individual male and female Eastern Grey Kangaroos Macropus giganteus (tagged as adults) in autumn/winter and spring/summer on the Anglesea golf course from May 2008 to November 2013. Data from censuses recording ≥50 tagged adults (8 autumn/winter and 16 spring/summer), from the first census after each individual was tagged to the last in which it was known to be alive, excluding individuals spanning <10 censuses. Error bars show standard error.

Mentions: To assess the attendance of tagged kangaroos at the golf course, we scored individuals as present or absent in each census from May 2008 to November 2013. We included only censuses that recorded ≥50 tagged adults to ensure an adequate sample size. This gave eight censuses in autumn and winter (March to August), two in each year of the four years, and 16 censuses in spring and summer (September to February), spread almost evenly over the years. We scored only individuals tagged as adults (76 females and 34 males), from the first census after each individual was tagged to the last census in which it was known to be alive, excluding individuals that spanned <10 censuses to ensure adequate coverage of the two ‘seasons’. The overall attendance rate was high, with a mean (±SE) of 79 ± 1% (Figure 4). Attendance was not affected by season (Repeated-measures ANOVA, F = 0.51, df = 1,108, P = 0.478), but the attendance rate of females was higher than males (F = 25.25 df = 1,108, P < 0.0001). Season and sex also interacted (F = 15.48, df = 1,108, P = 0.0001): attendance by males was much lower in autumn-winter (62%) than in spring-summer (75%), whereas females remained above 80%.


Hopping Down the Main Street: Eastern Grey Kangaroos at Home in an Urban Matrix.

Coulson G, Cripps JK, Wilson ME - Animals (Basel) (2014)

Mean attendance rate of individual male and female Eastern Grey Kangaroos Macropus giganteus (tagged as adults) in autumn/winter and spring/summer on the Anglesea golf course from May 2008 to November 2013. Data from censuses recording ≥50 tagged adults (8 autumn/winter and 16 spring/summer), from the first census after each individual was tagged to the last in which it was known to be alive, excluding individuals spanning <10 censuses. Error bars show standard error.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4494371&req=5

animals-04-00272-f004: Mean attendance rate of individual male and female Eastern Grey Kangaroos Macropus giganteus (tagged as adults) in autumn/winter and spring/summer on the Anglesea golf course from May 2008 to November 2013. Data from censuses recording ≥50 tagged adults (8 autumn/winter and 16 spring/summer), from the first census after each individual was tagged to the last in which it was known to be alive, excluding individuals spanning <10 censuses. Error bars show standard error.
Mentions: To assess the attendance of tagged kangaroos at the golf course, we scored individuals as present or absent in each census from May 2008 to November 2013. We included only censuses that recorded ≥50 tagged adults to ensure an adequate sample size. This gave eight censuses in autumn and winter (March to August), two in each year of the four years, and 16 censuses in spring and summer (September to February), spread almost evenly over the years. We scored only individuals tagged as adults (76 females and 34 males), from the first census after each individual was tagged to the last census in which it was known to be alive, excluding individuals that spanned <10 censuses to ensure adequate coverage of the two ‘seasons’. The overall attendance rate was high, with a mean (±SE) of 79 ± 1% (Figure 4). Attendance was not affected by season (Repeated-measures ANOVA, F = 0.51, df = 1,108, P = 0.478), but the attendance rate of females was higher than males (F = 25.25 df = 1,108, P < 0.0001). Season and sex also interacted (F = 15.48, df = 1,108, P = 0.0001): attendance by males was much lower in autumn-winter (62%) than in spring-summer (75%), whereas females remained above 80%.

Bottom Line: Vehicles were the major (47%) cause of mortality of tagged adults.Road-kills were concentrated (74%) in autumn and winter, and were heavily male biased: half of all tagged males died on roads compared with only 20% of tagged females.We predict that this novel and potent mortality factor will have profound, long-term impacts on the demography and behavior of the urban kangaroo population at Anglesea.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, The University of Melbourne, Parkville, VIC 3010, Australia. gcoulson@unimelb.edu.au.

ABSTRACT
Most urban mammals are small. However, one of the largest marsupials, the Eastern Grey Kangaroo Macropus giganteus, occurs in some urban areas. In 2007, we embarked on a longitudinal study of this species in the seaside town of Anglesea in southern Victoria, Australia. We have captured and tagged 360 individuals to date, fitting each adult with a collar displaying its name. We have monitored survival, reproduction and movements by resighting, recapture and radio-tracking, augmented by citizen science reports of collared individuals. Kangaroos occurred throughout the town, but the golf course formed the nucleus of this urban population. The course supported a high density of kangaroos (2-5/ha), and approximately half of them were tagged. Total counts of kangaroos on the golf course were highest in summer, at the peak of the mating season, and lowest in winter, when many males but not females left the course. Almost all tagged adult females were sedentary, using only part of the golf course and adjacent native vegetation and residential blocks. In contrast, during the non-mating season (autumn and winter), many tagged adult males ranged widely across the town in a mix of native vegetation remnants, recreation reserves, vacant blocks, commercial properties and residential gardens. Annual fecundity of tagged females was generally high (≥70%), but survival of tagged juveniles was low (54%). We could not determine the cause of death of most juveniles. Vehicles were the major (47%) cause of mortality of tagged adults. Road-kills were concentrated (74%) in autumn and winter, and were heavily male biased: half of all tagged males died on roads compared with only 20% of tagged females. We predict that this novel and potent mortality factor will have profound, long-term impacts on the demography and behavior of the urban kangaroo population at Anglesea.

No MeSH data available.


Related in: MedlinePlus