Dados do Trabalho

Título

Activity budget and daily cycle of black lion tamarins (Leontopithecus chrysopygus) from remote monitoring using accelerometers

Resumo

The black lion tamarin (Leontopithecus chrysopygus) is an endangered primate, endemic to the Atlantic Forest, whose elusive behaviour poses challenges to field monitoring. Biologgers allow the remote monitoring of primates and can therefore provide useful information for their conservation. Using tri-axial accelerometer loggers (25 Hz), we quantified the full daily activity cycle of 4 groups of wild black lion tamarins in 2 different forest fragments - two groups from a large fragment (PBC=1,303ha), and two from a small one (GUA=105ha). To be able to infer the behaviour of the 4 groups based on the accelerometer data, we developed behaviour classification routines based on the data collected on a fifth group, also tagged with accelerometers, that we followed in situ for 6 days in a continuous forest area, recording their behaviour through all occurrence and focal sampling. We derived infra-second scale behaviour records that, aligned with the accelerometer data, were used to build and validate behaviour classification rules for the accelerometer on the Behaviour Builder extension (DDMT software). The groups in the small fragment had a 65-min shorter daily length of activity period (GUA=11h±47min; PBC=12h±53min; P<0.0001). All groups rested on average 10% of their time during the day (except GUA02 with 0.04%) and, interestingly, were active 6% of their time during the night (except PBC01 with 3.6%). Further analyses will enable us to detail the behaviour profiles of the 4 groups (i.e. feeding, traveling, etc.), and to quantify behaviour-specific energy expenditure. By linking this information to data of forest structure and composition, we will be able to compare the activity, behaviour and energy allocation of tamarins living in forest patches of different degrees of disturbance - a key information for improved evidence-based conservation of the species.

Financiadores

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP – processos 2020/10617-9, 2017/11962-9 e 2014/14739-0), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES – Código de Financiamento 001), Disney Conservation Fund, Durrell Wildlife Conservation Trust, Whitley Fund for Nature, Margot Marsh Biodiversity Foundation/Re:wild, Lion Tamarins of Brazil Fund, Idea Wild. Apoio: Estação Ecológica Mico-leão-preto/ICMBio, Parque Estadual do Morro do Diabo/FF-SP, IPÊ - Instituto de Pesquisas Ecológicas, Laboratório de Primatologia (LaP/UNESP), Swansea Lab for Animal Movement (Swansea University).

Palavras-chave

biologging; dynamic body acceleration; ethogram

Área

Área 2 – Comportamento