Involving local communities for effective citizen science: determining game species' reproductive status to assess hunting effects in tropical forests

1. Involving communities in sustainable wildlife management in tropical forests can ensure food security and livelihoods of millions of forest dwellers that depend on wild meat, but also safeguard hunted species. Mathematical models have been developed to assess hunting sustainability; but these require empirical information on reproductive parameters of the prey species, often challenging to obtain. 2. Here, we suggest that if local people can accurately identify the reproductive status of hunted animals in the field, these data could fill the existing knowledge gap regarding species’ life-history traits and enable better assessments of hunting impacts. 3. We first tested whether local people in 15 rural communities in three Amazonian sites could accurately diagnose, before and after training, the pregnancy status of hunted pacas (Cuniculus paca), which we use as our model. We then applied the results from these tests to correct reproductive status data of hunted specimens, voluntarily collected over 17 years (2002-2018) as part of a citizen science project in one of our study sites. We ran generalized additive models to contrast these corrected reproductive rates with those obtained from the direct analysis of genitalia by researchers, and with indices describing game extraction levels (catch-per-unit-effort, CPUE, and age structure of hunted individuals). 4. Before training, interviewees correctly diagnosed pregnancy in 72.5% of tests, but after training, interviewees accurately diagnosed pregnancy in 88.2% of tests, with high improvements especially for earlier pregnancy stages. Monthly pregnancy rates determined by hunters and by researchers were similar. Reported annual pregnancy Page 3 of 45 Confidential Review copy Journal of Applied Ecology 4 rates were negatively correlated with CPUE, and positively correlated with the percentage of immatures in the hunted population, in accordance to an expected densitydependent response to variations in hunting levels. 5. We showed that the voluntary diagnosis of game species’ reproductive status by local people is a feasible method to obtain accurate life-history parameters for hunted tropical species, and to assess hunting effects on game populations. Given that almost half of the protected areas in the world are co-managed by local people, our results confirm the potential of integrating local communities in citizen science initiatives to ensure faster, low-cost, and more accurate data collection for wildlife management

Social and biological correlates of wild meat consumption and trade by rural communities in the Jutaí River basin, central Amazonia

Wild animals are an important source of food and income throughout the Amazon basin, particularly for forest-dependent communities living in the more remote regions. Through interviews in 51 households within 15 communities in the Jutaí River Extractive Reserve, Amazonas, Brazil, we determined animal taxa consumed, frequency of wild meat consumption, as well as patterns of wild meat trade. We then investigated the influence of social and biological factors on wild meat consumption and trade. People declared consuming wild meat on an average of 3.2 ± 2.8 days/month/household, amounting to 198.85 kg/month consumed by all sampled households. The vast majority of respondents got wild meat by hunting themselves, or it was given to them by their neighbors. The most consumed taxa were paca (Cuniculus paca) and collared peccary (Pecari tajacu). Approximately two-thirds of respondents declared selling wild meat; meat destined for urban markets was more expensive and was primarily sold from houses of relatives living in the city. Wild meat consumption was determined by taste preferences, while prices were related to the body mass of the taxa concerned. Frequency of wild meat consumption and the probability of selling wild meat were positively associated with the number of hunters in the household. We highlight the importance of wild meat for remote communities, and importantly the prominent links these communities have with urban markets. These findings are useful in developing strategies to ensure the sustainable use of wildlife in the Amazon