SEASONALITY, SIZE AND DIETARY OVERLAP BETWEEN PARROT SPECIES AND THE GOLDEN-BACKED UACARI (PRIMATES) IN CENTRAL BRAZILIAN AMAZONIA

SEASONALITY, SIZE AND DIETARY OVERLAP BETWEEN PARROT SPECIES AND THE GOLDEN-BACKED UACARI (PRIMATES) IN CENTRAL BRAZILIAN AMAZONIA | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 22 October 2025 V1 Latest version Share on SEASONALITY, SIZE AND DIETARY OVERLAP BETWEEN PARROT SPECIES AND THE GOLDEN-BACKED UACARI (PRIMATES) IN CENTRAL BRAZILIAN AMAZONIA Authors : Adrian Barnett 0000-0002-8829-2719 [email protected] , Oksana Hleba , Bruna Bezerra M , Renann DIAS-SILVA , Flor Maria Las-Casas 0000-0002-0000-092X , Marcelo Menezes , Thais Almeida , Welma Silva , Lucy Todd M , Anthony Lowney , and Sarah Boyle Authors Info & Affiliations https://doi.org/10.22541/au.176112374.44278514/v1 130 views 75 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Abstract: This study examines seasonal dietary overlap between 19 Amazonian parrots and the Golden-backed uacari monkey ( Cacajao ouakary) in Jaú National Park, Amazonas, Brazil. By analysing feeding patterns of parrot species across a range of body sizes, using a total of 25,420 feeding records, we explore interspecies competition for fruit resources across different seasons. Larger parrot species (notably the macaws) exhibit more specialised dietary niches, overlapping most with uacaris during high fruit availability periods, while smaller parrots show more generalist tendencies and lower overlap. Findings suggest that parrot body size and beak morphology, along with seasonal shifts in fruit abundance, play a critical role in dietary partitioning and resource competition in this diverse tropical community. It also indicates that, while resource overlap is most extensive between macaws and uacaris (both hard-fruit specialists), overlap also occurs between uacaris and even the smallest parrots, especially during periods low fruit availability. Thus, dietary niche overlap between uacaris and parrots is not, as previous work suggested, confined to large species (macaws and Amazona parrots), but occurs with all species depending on the time of the year. Supplementary Material File (oik-12086-file001.docx) Download 2.07 MB Information & Authors Information Version history V1 Version 1 22 October 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords dietary overlap jaú national park pitheciidae psittacidae resource competition seasonality Authors Affiliations Adrian Barnett 0000-0002-8829-2719 [email protected] University of Greenwich Natural Resources Institute View all articles by this author Oksana Hleba Middlesex University Department of Natural Sciences View all articles by this author Bruna Bezerra M Universidade Federal de Pernambuco Departamento de Zoologia View all articles by this author Renann DIAS-SILVA Instituto Nacional de Pesquisas da Amazonia View all articles by this author Flor Maria Las-Casas 0000-0002-0000-092X Universidade Estadual do Maranhão View all articles by this author Marcelo Menezes Instituto Nacional de Pesquisas da Amazonia View all articles by this author Thais Almeida Secretaria de Estado da Saude do Parana View all articles by this author Welma Silva Universidade Federal do Amazonas View all articles by this author Lucy Todd M University of California Davis Department of Environmental Science and Policy View all articles by this author Anthony Lowney University of Cape Town Percy FitzPatrick Institute of African Ornithology View all articles by this author Sarah Boyle Instituto Nacional de Pesquisas da Amazonia View all articles by this author Metrics & Citations Metrics Article Usage 130 views 75 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Adrian Barnett, Oksana Hleba, Bruna Bezerra M, et al. SEASONALITY, SIZE AND DIETARY OVERLAP BETWEEN PARROT SPECIES AND THE GOLDEN-BACKED UACARI (PRIMATES) IN CENTRAL BRAZILIAN AMAZONIA. Authorea . 22 October 2025. DOI: https://doi.org/10.22541/au.176112374.44278514/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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