Territory Stories

Aerial survey of donkey and horse populations in the Victoria River District 2006

Details:

Title

Aerial survey of donkey and horse populations in the Victoria River District 2006

Creator

Saalfeld, Keith

Collection

E-Publications; PublicationNT; E-Books

Date

0000-00-00

Description

Made available via the Publications (Legal Deposit) Act 2004 (NT).

Notes

2001 and 2006 Aerial survey. 2001 survey was published by Parks and Wildlife Commission of the Northern Territory, Palmerston (N.T.) 2006 survey was published by Department of Natural Resources, Environment and The Arts, Palmerston (N.T.)

Language

English

Subject

Feral livestock -- Northern Territory -- Victoria River Downs; Donkeys -- Northern Territory -- Victoria River Downs; Horses -- Northern Territory -- Victoria River Downs

File type

application/pdf.

Copyright owner

Check within Publication or with content Publisher.

Parent handle

https://hdl.handle.net/10070/230511

Citation address

https://hdl.handle.net/10070/670949

Related items

https://hdl.handle.net/10070/670947

Page content

Determination of off-take rates for donkeys and horses on individual properties was done using these estimated property densities according to the method of Choquenot (1988a). To overcome the problem of distinguishing between feral horses and domestic horses, all sightings of horses within 10 kilometres of station homesteads were classified as domestic and excluded from the analysis. Results Estimates of population size and density and associated standard errors for donkeys and horses are summarised in Table 2. The total number of donkeys was estimated at 113,337 15,636 giving a precision of 13.8%, an average density of 0.78 km-2. Horse numbers were estimated at 38,725 8,978 giving a precision of 23.2%, an average density of 0.27 km-2. Table 2: Population abundance and density of donkeys and horses for each of the survey blocks from the 2001 VRD feral animal survey. Estimated species population abundance and density for each of the survey blocks and the overall estimated species population abundance and density for the survey area. Estimates are presented the standard error of the estimate. Values in parentheses are precision of the estimate. Donkey Horse Block Number Density km-1 Number Density km-1 One 2,950 1,931 0.25 0.16 740 727 0.06 0.06 Two 983 644 0.08 0.05 626 358 0.05 0.03 Three 1,639 912 0.14 0.08 1,993 1,178 0.17 0.10 Four 21,553 6,048 1.82 0.51 6,834 4,439 0.58 0.37 Five 1,803 911 0.15 0.08 911 441 0.08 0.04 Six 1,065 632 0.09 0.05 1,082 951 0.09 0.08 Seven 50,646 11,649 4.29 0.99 6,891 2,732 0.58 0.23 Eight 16,062 6,041 1.36 0.51 5,012 1,701 0.42 0.14 Nine 683 564 0.06 0.05 Ten 456 345 0.06 0.04 Eleven 9,506 4,060 0.81 0.35 9,681 6,633 0.82 0.57 Twelve - - - Thirteen 7,130 3,609 0.99 0.50 3,816 1,720 0.53 0.24 Overall 113,337 15,636 (13.8%) 0.78 0.11 38,725 8,978 (23.2%) 0.27 0.06


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