The impact and implications of vehicle collisions on the endangered and endemic Zanzibar red colobus (<i>Piliocolobus kirkii</i>)

Olgun, Harry; Mohammed, Mzee Khamis; Mzee, Abbas J.; Green, M. E. Landry; Davenport, Tim R.B.; Georgiev, Alexander V.

doi:10.1101/2020.01.17.906909

Cited by 2 publications

(2 citation statements)

References 38 publications

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“…6000 individuals, 50% of which are found at this national park (Davenport et al, 2019). The subjects of this study are exposed to high levels of habitat disturbance and human activity from roads, tourism, and nearby villages and farms (Georgiev et al, 2019; Olgun et al, 2021; Siex & Struhsaker, 1999). They do not receive provisioned food.…”

Section: Methodsmentioning

confidence: 99%

Methodological confounds of measuring urinary oxidative stress in wild animals

Melvin

Dhirani

Mitchell

et al. 2022

Ecology and Evolution

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Biomarkers of oxidative stress (OS) are useful in addressing a wide range of research questions, but thus far, they have had limited application to wild mammal populations due to a reliance on blood or tissue sampling. A shift toward non‐invasive measurement of OS would allow field ecologists and conservationists to apply this method more readily. However, the impact of methodological confounds on urinary OS measurement under field conditions has never been explicitly investigated. We combined a cross‐sectional analysis with a field experiment to assess the impact of four potential methodological confounds on OS measurements: (1) time of sampling, (2) environmental contamination from foliage; (3) delay between sample collection and flash‐freezing in liquid nitrogen; and (4) sample storage of up to 15 months below −80°C. We measured DNA oxidative damage (8‐hydroxy‐2′‐deoxyguanosine, 8‐OHdG), lipid peroxidation (malondialdehyde, MDA), total antioxidant capacity (TAC), and uric acid (UA) in 167 urine samples collected from wild Zanzibar red colobus ( Piliocolobus kirkii ). We found that MDA was higher in samples collected in the morning than in the afternoon but there were no diurnal patterns in any of the other markers. Contamination of samples from foliage and length of time frozen at −80°C for up to 15 months did not affect OS marker concentrations. Freezing delay did not affect OS levels cross‐sectionally, but OS values from individual samples showed only moderate‐to‐good consistency and substantial rank‐order reversals when exposed to different freezing delays. We recommend that diurnal patterns of OS markers and the impact of storage time before and after freezing on OS marker concentrations be considered when designing sampling protocols. However, given the high stability we observed for four OS markers subject to a variety of putative methodological confounds, we suggest that urinary OS markers provide a valuable addition to the toolkit of field ecologists and conservationists within reasonable methodological constraints.

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Section: Methodsmentioning

confidence: 99%

Methodological confounds of measuring urinary oxidative stress in wild animals

Melvin

Dhirani

Mitchell

et al. 2022

Ecology and Evolution

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“…At least one translocation of a large group of colobus has proven successful as a way of relocating threatened groups (Struhsaker & Siex 1998). Road kill and feral dogs also threaten this population (Olgun et al 2020;Georgiev et al 2019).…”

Section: Conservationmentioning

confidence: 99%

Red Colobus Natural History

Korstjens¹,

Hillyer²,

Koné³

2022

The Colobines

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This chapter reviews current knowledge of the red colobus, Piliocolobus, a polytypic widespread colobine living in sub-Saharan African forests, woodlands, mangroves, and riparian forests. The taxonomy of Piliocolobus has undergone many changes and is still unresolved, resulting in confusion and possibly hindering conservation efforts.Red colobus is known for being the favourite prey of chimpanzees in many locations, and in several populations red colobus associate with guenons to reduce predation risk. Less well-known are their sexual swellings, which vary greatly in size across the genus, and their graded vocal repertoire that lacks a long call, but in some cases includes female mating calls. Noisy, large multi-female multi-male groups, female dispersal, philopatric males that form coalitions, and lack of female allomothering are considered the norm for the genus but these are not universal. Red colobus is facing extirpation in many locations due to human hunting and forest destruction. Various serious diseases and parasites are also reported for many populations and are often associated with human encroachment into their habitat. Much about the social behaviour is yet to be studied, especially in the less-studied central African species assemblage.

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The impact and implications of vehicle collisions on the endangered and endemic Zanzibar red colobus (Piliocolobus kirkii)

Cited by 2 publications

References 38 publications

Methodological confounds of measuring urinary oxidative stress in wild animals

Methodological confounds of measuring urinary oxidative stress in wild animals

Red Colobus Natural History

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