Tagged / diet

Conversation article: Big cats eat more monkeys in a damaged tropical forest – and this could threaten their survival

Aralisa Sheddon writes about her research which found that big cats in southern Mexico are increasingly preying on endangered howler and spider monkeys…

Big cats eat more monkeys in a damaged tropical forest – and this could threaten their survival

A jaguar in the jungle of southern Mexico.
Mardoz/Shutterstock

Aralisa Shedden, Bournemouth University

Monkeys are not usually a popular menu item for big cats. Primates are, after all, hard to catch: living in the canopies of large trees and rarely coming down to the ground. Jaguar and puma have varied diets and will normally hunt the species that are most common where they live, such as deer, peccary (a type of wild pig) and armadillo.

But jaguar and puma living in southern Mexican forests with a high human footprint (where wood and other resources are regularly harvested and there are large clearings for farms or expanding settlements) seem to be changing their feeding preferences to include more monkeys, according to new research.

Other studies have already found that when there is less of their usual prey around, big cats turn to alternatives. The changes in jaguar and puma diets that my colleagues and I recorded may indicate that the populations of these normal prey are shrinking, or that something in the environment has changed to make catching and eating primates easier.

This change in the diet of large cats could make the disappearance of primate populations in tropical forests like this one in southern Mexico more likely. This would, in turn, make the disappearance of large cats themselves more likely due to a lack of food, threatening the stability of an entire ecosystem.

On the trail of big cats

When forests are cut down or altered by loggers and hunters, primates are particularly affected, as many species depend on tall trees for food, shelter and to chart paths through the forest. Globally, more than 60% of primate species are threatened with extinction.

These changes to forests have also put large predators at risk. Understanding what is happening in these areas can inform more effective conservation measures, which may prevent species from disappearing.

The Uxpanapa valley in southeastern Mexico is one of the last relicts of tall evergreen forest in the country, and is classified as one of the most biodiverse areas in both Mexico and the world. It is home to jaguar, puma and many other species, including two endangered primates: howler and spider monkeys.

A black monkey in a tropical forest canopy.
Howler monkeys are native to South and Central American forests.
David Havel/Shutterstock

I led a research team that studied the distribution of primates in the Uxpanapa Valley for the first time. We recorded the number of primates and where they were found, as well as the type of forest they preferred.

Another team looked for large cats with the help of a dog which could detect their faeces, otherwise known as scat. Scat was collected to obtain DNA and determine the species that left it, whether it had any parasites, and what its diet was like. The team found out what prey these large cats were eating by using microscopes to study the hairs left in each scat. Special identification guides can link each kind of animal to its hair – each has a particular colour, pattern and shape.

Large carnivores maintain biodiversity and the functioning of an ecosystem by controlling populations of certain species – for example, herbivores that might otherwise harm trees or prevent forests regrowing. The presence of such predators can indicate an ecosystem’s health. Knowing what top predators are eating can tell us even more about how an ecosystem is functioning.

What we found

When we combined the data and information we collected, we began to understand that something out of the ordinary was happening.

Primates were the most frequent prey found in jaguar and puma scats, making up nearly 35% of the remains. Primate remains were also more likely to be found in scats collected from areas with less forest. Spider monkey remains, for example, were more likely to be found in scats collected in areas with more villages, and in forest that was regrowing after being disturbed.

A possible explanation is that where there are more villages, it is likely that there is more hunting and tree-cutting taking place. Where there is more hunting, the prey that jaguar and puma usually prefer might not be as plentiful. And regrowing forests do not offer primates the same protection as tall, untouched forests. These two factors may explain why large cats are eating spider monkeys more often here.

Jaguar and puma will usually eat the prey that is more abundant. If their preferred prey is scarce, they will hunt the species they encounter most. Similar to what we observed with spider monkeys, in areas where there was less tall forest, howler monkey remains were more likely than non-primate prey to be found in the scats, possibly as big cats found it easier to reach primates.

A pile of logs in a deforested Mexican plain.
Logging robs monkeys of hiding places from predators.
Eduardo Cota/Shutterstock

Less tree cover and overhunting of other prey (combined with general habitat loss) could explain the high rates of primate predation we discovered. Nevertheless, we need to continue monitoring these sites to fully understand these changes in large cat diets.

Our results highlight the importance of maintaining tall forest cover to ensure primates and other forest-dependent species can survive. They also raise the urgent need for conservation, before the negative effects of human activities on both primate and large cat populations become irreversible, and the ecosystems they live in are lost.


Imagine weekly climate newsletter

Don’t have time to read about climate change as much as you’d like?

Get a weekly roundup in your inbox instead. Every Wednesday, The Conversation’s environment editor writes Imagine, a short email that goes a little deeper into just one climate issue. Join the 20,000+ readers who’ve subscribed so far.The Conversation


Aralisa Shedden, Postdoctoral Researcher in Conservation, Bournemouth University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Congratulations to Dr. Tsofliou & Prof. Appleton on latest interdisciplinary paper

Congratulations to BU’s interdisciplinary nutrition-behavioural sciences team that published the recent review “Barriers and Facilitators Associated with the Adoption of and Adherence to a Mediterranean Style Diet in Adults: A Systematic Review of Published Observational and Qualitative Studies” [1] in the journal NutrientsThe academics are based in two different faculties, namely the Faculty of Health & Social Sciences and the Faculty of Science & Technology, represented by Dr. Fotini Tsofliou and Prof Katherine Appleton respectively.  Two BU students (recently graduated) are also two co-authors: Dimitrios Vlachos (who completed the MRes) and Christina Hughes (MSc Nutrition & Behaviour).

This review which is Open Access includes all studies investigating barriers or facilitators to adopting or adhering to a Mediterranean style diet in adults aged 18 years old and over.  The paper identified  financial, cognitive, socio-cultural, motivational, lifestyle, accessibility & availability, sensory and hedonic and demographic factors. Similar barriers and facilitators are often reported in relation to healthy eating or the consumption of specific healthy foods, with a few exceptions. These exceptions detailed concerns with specific components of the MedDiet; considerations due to culture and traditions, and concerns over a cooler climate. Suggestions for overcoming these barriers and facilitators specific to adoption and adherence to the Mediterranean diet are offered. 

Well done!  nutrients-logo

Prof. Edwin van Teijlingen

CMMPH

 

Reference:

  1. Tsofliou F, Vlachos D, Hughes C, Appleton KM. Barriers and Facilitators Associated with the Adoption of and Adherence to a Mediterranean Style Diet in Adults: A Systematic Review of Published Observational and Qualitative Studies. Nutrients. 2022; 14(20):4314. https://doi.org/10.3390/nu14204314

New FHSS nutrition publication

Congratulations to Faculty of Health & Social Sciences’ PhD student Karim Khaled and supervisors Prof. Vanora Hundley and Dr. Fotini Tsofliou on the acceptance of your manuscript ‘Perceived Stress was associated with Poorer Diet Quality among Women of Reproductive Age in the UK’.  This paper will appear in the international journal Nutrients.
All three are associated with our research unit CMMPH (Centre for Midwifery, Maternal & Perinatal Health). This paper is supported by BU’s Open Access Fund will be freely available online soon.

Well done!

 

Prof. Edwin van Teijlingen

CMMPH

New COVID-19 publication by BU academics

Congratulations to FHSS’s Prof. Jane Murphy and Victoria Lawrence on the publication of their study ‘A UK survey of nutritional care pathways for patients with COVID‐19 prior to and post‐hospital stay’ in the Journal of Human Nutrition & Dietetics [1].
This study examined the development of care pathways by UK dietitians to manage the post‐hospital nutritional care of patients following COVID‐19 infection and the evaluation of these pathways. Of the responses, 51% reported developing or adapting a pathway for COVID‐19 infection and 54% planned to undertake evaluation of their pathway. Despite challenges encountered, dietitians have responded rapidly and adapted to new ways of working.  The paper is Open Access and co-authored with colleagues from the University of Plymouth, Guy’s & St Thomas’ NHS Foundation Trust (in London), University College London Hospitals NHS Foundation Trust, NHS Glasgow & Clyde, and Imperial College London.

 

Congratulations!
Prof. Edwin van Teijlingen
CMMPH

 

Reference:

  1. Lawrence, V., Hickson, M., Weekes, C.E., Julian, A., Frost, G., Murphy, J. (2021) ‘A UK survey of nutritional care pathways for patients with COVID‐19 prior to and post‐hospital stayJournal of Human Nutrition & Dietetics [Online first 12 May 2021]

New CMMPH nutrition paper published

Congratulations to FHSS authors on the publication of their paper “A Priori and a Posteriori Dietary Patterns in Women of Childbearing Age in the UK” which has been published in the scientific journal Nutrients [1].  The authors highlight that a poor diet quality is a major cause of maternal obesity. They investigated investigate a priori and a-posteriori derived dietary patterns in childbearing-aged women in the United Kingdom. An online survey assessed food intake, physical activity (PA), anthropometry and socio-demographics.  A poor diet quality was found among childbearing-aged women; notably in the younger age category, those of white ethnicity, that were more physically inactive and with a lower socioeconomic background.

The article is Open Access and freely available (click here!).

 

 

Reference:

  1. Khaled, K.; Hundley, V.; Almilaji, O.; Koeppen, M.; Tsofliou, F. (2020) A Priori and a Posteriori Dietary Patterns in Women of Childbearing Age in the UK. Nutrients 202012, 2921.

Congratulation to BU nutritionists

This week Elsevier  Publishers sent the proofs for a book chapter written by two Bournemouth University nutrition researchers: Fotini Tsofliou and Iro Arvanitidou in collaboration with an academic colleague from Greece: Xenophon Theodoridis.  The chapter ‘Toward a Mediterranean-style diet outside the Mediterranean countries: Evidence of implementation and adherence’​ will appear in 2021 in the second edition of the book  The Mediterranean diet edited by Victor R. Preedy and Ronald R. Watson

Congratulations!

Prof. Edwin van Teijlingen

Centre for Midwifery, Maternal & Perinatal Health (CMMPH)

New FHSS nutrition publication

Congratulations to FHSS academics Dr. Fotini Tsofliou and Prof. Carol Clark on the acceptance for publication of their latest article ‘Effects of lunch club attendance on the dietary intake of older adults in the UK: a pilot cross-sectional study’ [1].  This paper is forthcoming in the journal Nutrition & Health (published by SAGE).

 

Reference:

  1. Tsofliou, Fotini; Grammatikopoulou, Maria; Lumley, Rosie; Gkiouras, Konstantinos; Lara, Jose ; Clark, Carol (2020)  Effects of lunch club attendance on the dietary intake of older adults in the UK: a pilot cross-sectional study.  Nutrition & Health (accepted)

BU PhD student PROSPERO publication

Congratulations to BU PhD student Dimitrios Vlachos who had his PROSPERO protocol published [1].   Dimitrios working on a project promoting the Mediterranean-style diet in childbearing age, he is supervised across faculties by Dr. Fotini Tsofliou and Prof. Katherine Appleton.

Well done!

Prof. Edwin van Teijlingen

Centre for Midwifery, Maternal & Perinatal Health (CMMPH)

 

Reference:

  1. Tsofliou, F., Appleton, K., Vlachos, D. (2018) Barriers and facilitators to following a Mediterranean style diet in adults: a systematic review of observational and qualitative studies. PROSPERO 2018 CRD42018116515

 

 

 

BU Nutrition students help to transform hospital menus

BSc (Hons) Nutrition students at Bournemouth University have been working with staff at Poole’s Alderney Hospital to produce new menus for hospital patients and staff, which are tasty, nutritious and full of locally-sourced ingredients.

Thanks to the students, Alderney Hospital also expects to see a reduction in its food wastage figures which could lead to significant savings.

Click here to find out more about how the BU students carried out this transformation.

Mike Smith, Geograph.

 

#TalkBU presents… Coping with stress in changing health behaviours

#TalkBU is a monthly lunchtime seminar on Talbot Campus, open to all students and staff at Bournemouth University and free to attend. Come along to learn, discuss and engage in a 20-30 minute presentation by an academic or guest speaker talking about their research and findings, with a Q&A to finish. 


Often our New Year resolutions involve changing unhealthy habits in the coming year. But how many of us have actually managed to change our unhealthy lifestyle and maintained it? Changes can be stressful, but how one manages the change can potentially ease that stress and make the change more achievable, which can potentially impact our physical and psychological well-being.

In this talk, Dr Fiona Ling will discuss her research that centres around physical activity behaviour change, and the extended implications on changing other health habits and public health promotions in order to encourage a healthy lifestyle.

When: Thursday 19 April at 1 – 2pm

Where: Room FG04, Fusion Building

Register here to attend

Click here to find out more about our future and previous #TalkBU events.

BU Briefing – Trophic positioning of meiofauna revealed by stable isotopes & food web analyses

Our BU briefing papers are designed to make our research outputs accessible and easily digestible so that our research findings can quickly be applied – whether to society, culture, public policy, services, the environment or to improve quality of life. They have been created to highlight research findings and their potential impact within their field. 


This paper examines seasonal food webs of the invertebrates inhabiting the streambed of the chalk River Lambourn in England. Researchers conducted analyses of gut content (a dietary “snapshot”) of macro and meiofauna, as well as stable isotope analyses (determines the feeding links of an organism as it reflects its assimilated diet) of meiofauna to examine seasonal food webs of the chalk stream.

This study stresses the importance of temporal variations in food and consumer species composition for a comprehensive understanding of food web structure, asserted by similar changes in trophic structure depicted by gut content and stable isotope analyses.

Click here to read the briefing paper.


For more information about the research, contact Professor Genoveva Esteban at gesteban@bournemouth.ac.uk 
To find out how your research output could be turned into a BU Briefing, contact research@bournemouth.ac.uk.