Setting Harness Sizes and Other Marking Techniques for a Falcon With Strong Sexual Dimorphism

Kenward, Robert E.; Pfeffer, Ralf H.; Al-Bowardi, Mohamed A.; Fox, Nicholas C.; Riddle, K.E.; Bragin, Evgeny A.; Levin, Anatoli; Walls, Sean S.; Hodder, Kathy H.

doi:10.1648/0273-8570-72.2.244

Cited by 32 publications

(23 citation statements)

References 17 publications

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“…Taking body weight into account, the transmitter weights were all less than 5% of the body mass of the falcons. Transmitters were attached to the back of the falcon with a 6-mm Teflon tube harness [13] using a standard backpack configuration.…”

Section: Methodsmentioning

confidence: 99%

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Home Range and Habitat Use of the New Zealand Falcon (Falco novaeseelandiae) within a Plantation Forest: A Satellite Tracking Study

Thomas

Minot

Holland

2010

International Journal of Ecology

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We tracked two adult and three juvenile New Zealand falcons (Falco novaeseelandiae) in Kaingaroa Forest pine plantation from 2002 to 2008 using Argos satellite technology. The home ranges for both adults and juveniles varied, ranging between 44 and 587 km 2 . The falcons occasionally utilised areas outside the forest and used stands of all ages within the forest, generally in proportion to their availability. For the most part, the juveniles remained within ca. 8 km of their nests and dispersed at 58, 69, and 68 days after fledging. Falcon movement information was obtained from an average of four location points per tracking day per falcon at a putative accuracy of 350 m. The transmitters, including their solar charge capability, performed well in the forest environment. The use of all stand ages highlights the importance of forestry practises that maintain a mosaic of different aged pine stands.

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Section: Methodsmentioning

confidence: 99%

“…MCP estimators are thought to overestimate space use [13]; however, they were used here to enable comparison with other studies and to map the maximum area potentially required by each falcon. A kernel-based home range utilising the 95% probability contour was used as a second measure to reduce outlier bias.…”

Section: Methodsmentioning

confidence: 99%

Home Range and Habitat Use of the New Zealand Falcon (Falco novaeseelandiae) within a Plantation Forest: A Satellite Tracking Study

Thomas

Minot

Holland

2010

International Journal of Ecology

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“…The present equation allows the excess loop span to be calculated and therefore greatly facilitates the optimal harnessing of growing individuals. Similarly, species with a pronounced sex dimorphism require different loop spans (Kenward et al 2001), which can be predicted using the present relationship. The use of elastic cords to account for future growth or for variation in body size is limited because a permanent extension of the loops causes pressure, and hence, the risk of injuries.…”

Section: Discussionmentioning

confidence: 58%

An allometric function to fit leg‐loop harnesses to terrestrial birds

Naef‐Daenzer¹

2007

Journal of Avian Biology

117

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Harnesses are indispensable for a long‐term attachment of instruments to animals, particularly birds. The exact fit is crucial for both the reliability of the tags and the animals’ health and natural behaviour. Using data from 19 bird species ranging from 8–400 g, I present an allometric function to calculate the dimension of leg‐loop harnesses for birds on the basis of body mass data. The model greatly facilitates determining the correct loop span for new species without time‐consuming experiments. More importantly, the equation permits calculation of the excess span that is required for tagging juvenile, still growing birds.

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“…The falcons were trapped in the vicinity of the nest using a variety of methods including bal chatri traps, noose hats, and dho-gaza nets (Fox 1977, Bloom 1987, Massey University Ethics approval 01/24 and 03/105, RANZ permit 0285, DOC permit BP-13884-RES). Twelve-gram two-stage Sirtrack Ltd. radiotransmitters with a 15-hr-on, 9-hr-off duty cycle were attached to 16 adult New Zealand Falcons (nine males and seven females) using backpack harnesses that included a weak link (Kenward et al 2001). The nest of one pair was depredated within one wk of attaching the transmitters and one transmitter failed after one wk of tracking.…”

Section: Telemetry During the 2004/2005 And 2005/2006mentioning

confidence: 99%

Home Range and Habitat Use of New Zealand Falcons (Falco novaeseelandiae) in an Exotic Plantation Forest During the Breeding Season

Seaton¹,

Minot²,

Holland³

2013

Journal of Raptor Research

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Setting Harness Sizes and Other Marking Techniques for a Falcon With Strong Sexual Dimorphism

Cited by 32 publications

References 17 publications

Home Range and Habitat Use of the New Zealand Falcon (Falco novaeseelandiae) within a Plantation Forest: A Satellite Tracking Study

Home Range and Habitat Use of the New Zealand Falcon (Falco novaeseelandiae) within a Plantation Forest: A Satellite Tracking Study

An allometric function to fit leg‐loop harnesses to terrestrial birds

Home Range and Habitat Use of New Zealand Falcons (Falco novaeseelandiae) in an Exotic Plantation Forest During the Breeding Season

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