Traditional knowledge and uses of the Caryocar brasiliense Cambess. (Pequi) by “quilombolas” of Minas Gerais, Brazil: subsidies for sustainable management

Conhecimento tradicional e usos de Caryocar brasiliense Cambess. (Pequi) por quilombolas de Minas Gerais, Brasil: subsídios para o manejo sustentável

Abstract

Local knowledge of biodiversity has been applied in support of research focused on utilizing and management of natural resources and promotion of conservation. Among these resources, Pequi (Caryocar brasiliense Cambess.) is important as a source of income and food for communities living in the Cerrado biome. In Pontinha, a “quilombola” community, which is located in the central region of State of Minas Gerais, Brazil, an ethnoecological study about Pequi was conducted to support initiatives for generating income for this community. Data were collected through semi-structured interviews, participant observation, and crossing. The most relevant uses of Pequi were family food (97%), soap production (67%), oil production (37%), medical treatments (17%), and trade (3%). Bees were the floral visitors with the highest Salience Index (S=0.639). Among frugivores that feed on unfallen fruits, birds showed a higher Salience (S=0.359) and among frugivores who use fallen fruits insects were the most important (S=0.574). Borers (folivorous caterpillars) that attack trunks and roots were the most common pests cited. According to the respondents, young individuals of Pequi are the most affected by fire due to their smaller size and thinner bark. Recognition of the cultural and ecological importance of Pequi has mobilized the community, which has shown interest in incorporating this species as an alternative source of income.

Keywords:
Cerrado; traditional communities; ethnoecology; income

Resumo

O conhecimento local acerca da biodiversidade vem sendo utilizado em pesquisas voltadas ao uso e manejo de recursos naturais aliados à conservação. Entre estes recursos, destaca-se o Pequi (Caryocar brasiliense Cambess.) devido à sua importância econômica e alimentar para comunidades que vivem no Cerrado. No quilombo de Pontinha, localizado na região central do estado de Minas Gerais, um estudo etnoecológico sobre o Pequi foi desenvolvido, a fim de subsidiar iniciativas de geração de trabalho e renda para esta comunidade. Informações foram obtidas por meio de entrevistas semiestruturadas, observação participante e travessia. Alimentação familiar (97%), produção de sabão (67%), produção de óleo (37%), tratamento medicinal (17%) e comércio (3%) foram os principais usos do Pequi citados pelos comunitários. Abelhas foram os visitantes florais com maior Índice de Saliência (S=0,639). Dentre os frugívoros que se alimentam de frutos não caídos, as aves apresentaram maior Saliência (S=0,359) e os insetos foram os mais importantes frugívoros entre os que utilizam frutos caídos (S=0,574). Brocas, lagartas folívoras e que atacam troncos e raízes foram as pragas mais citadas. Os indivíduos jovens de Pequi são, segundo os entrevistados, os mais afetados pelo fogo devido ao menor porte e por ter a casca menos espessa. O reconhecimento da importância cultural e ecológica do Pequi tem mobilizado a comunidade, que demonstra interesse em fazer dessa espécie uma alternativa de renda.

Palavras-chave:
Cerrado; comunidades tradicionais; etnoecologia; renda

1 Introduction

The study area is located in the Cerrado biodiversity hotspot, a biome that covers approximately 22% of Brazil (Ratter, 1997; Mittermeier et al., 2004). In addition to its biological importance, Cerrado is home to a diverse range of traditional communities that embody great knowledge about its resources. Indigenous peoples, “quilombolas”, “vazanteiros”, “retireiros”, “geraizeiros” and woman breakers (“quebradeiras de coco”) are the main ethnically differentiated groups in this biome (Barbosa et al., 1990; Brasil, 2004). These and other rural communities obtain part of their income through networks of collection, processing, and trade of sociobiodiversity products (Pozo, 1997; Silva and Tubaldini, 2013).

The Pequi tree (Caryocar brasiliense Cambess., Caryocaraceae) (Medeiros and Amorim, 2015) has great economic and subsistence values for many communities living in the Cerrado (Araujo, 1995; Vieira et al., 2006; Sano et al., 2008; Afonso and Ângelo, 2009; Assunção, 2012, Santos et al., 2013). Pequi fruits can be consumed fresh or as jams, jellies, liqueurs, creams and oils (Germano et al., 2007; Carvalho, 2008) and their leaves are also used in folk medicine for treating respiratory diseases (Rodrigues and Carvalho, 2001; Germano et al., 2007; Monteles and Pinheiro, 2007) or manufacturing cosmetics products (Oliveira et al., 2008; Pianovski et al., 2008). In addition to the ethnobotanic and ethnoecological investigations with C. brasiliense, other studies show anti-inflammatory and antioxidants properties of the oil extracted from the Pequi pulp (Roesler et al., 2008; Aquino et al., 2011).

In northern Brazil the species Caryocar villosum (Albu.) Pers., popularly known as Piquiá, has a wide range of culinary, commercial, and medicinal uses, being indicated for treating inflammatory and respiratory diseases (Rios et al., 2001). In this sense, studies in Tapajós National Forest showed analgesic and anti-inflammatory properties of this species, both recognized by the forest dwellers and verified by pharmacological investigations undertaken in this protected area (Galuppo, 2004). Caryocar coreaceum Wittm., another species of northeastern Brazil, is used for culinary, economic, and medicinal purposes (Gonçalves, 2008; Saraiva et al., 2011, Sousa-Júnior et al., 2013). In Chapada do Araripe, (Ceará State), in addition to the uses already mentioned, the fruit shell of C. coreaceum is used as animal fodder (Sousa-Júnior et al., 2013).

Many traditional communities have associated the use of natural resources with their conservation, since they have direct dependence on these resources for their economic and social development (Diegues and Viana, 2004; Pedroso-Júnior and Sato, 2005, Lima, 2008; Oliveira, 2009; Lima et al., 2012, Sousa-Júnior et al., 2013). An increasing number of studies take into account the value of the vast knowledge of rural communities obtained by practice and observations since this knowledge contributes to the collective definition of the best conservation strategies and sustainable use of resources (Berkes et al., 2000; Hanazaki, 2003; Donovan and Puri, 2004; Figueiredo et al., 2006; Lima, 2008; Oliveira, 2009; Schmidt et al., 2007; Sousa-Júnior et al., 2013; Drumond et al., 2013).

A large number of ethnobotanic studies with brazilian Afrodescendant communities have been reviewed by Albuquerque (1999). Other studies specially developed with “quilombolas” communities were recognized as important sources of information about Brazilian biodiversity, as well for the conservation of biomes such as the Atlantic Rain Forest (Barroso et al., 2010; Crepaldi and Peixoto, 2010; Almada, 2012; Adams et al., 2013), the Amazonian (Oliveira et al., 2011), and the Cerrado (Franco and Barros, 2006; Massarotto, 2009; Cezari, 2010; Viana, 2013). Besides being source of basic subsistence, biodiversity is crucial for the “quilombolas” health care, spiritual practice, and to providing material for infrastructure, technology, ornaments, fuel, and source of alternative income (Franco and Barros, 2006; Massarotto, 2009; Barroso et al., 2010; Crepaldi and Peixoto, 2010; Cezari, 2010; Viana, 2013).

The “quilombola” community of Pontinha, located in central region of the State of Minas Gerais, is closely related on Cerrado’s biological resources for income and the reproduction of its ways of living (Morais et al., 2013). Among these resources, the extractivism of a giant earthworm (“minhocuçu”) Rhinodrilus alatus (RIGHI 1971) is one of the most important activities for the “quilombo” dwellers. Nevertheless, the management of this species requires restrictions, especially with respect to its extraction during the breeding period, which occurs in the rainy season from October to February (Drumond et al., 2013). However, suspension of the extraction is more feasible if combined with promoting and developing an alternative source of income during this time of year.

The C. brasiliense species is abundant in Pontinha’s territory and the fruit production overlap with minhocuçu’s breeding period, in this context we seek to study local knowledge about Pequi to contribute to the assessment of the feasibility of its use as an alternative income source for the community.

2 Material and Methods

2.1 Study area

The “quilombo” of Pontinha has 774 hectares and approximately 200 households (Sabará, 2001). This territory is situated in the central region of the State of Minas Gerais, in Brazil, and is 18 km from the municipality of Paraopeba (Figure 1). This area has an important remnant of Cerrado that, although modified, contrasts with the surroundings, where pastures and monocultures of Eucalyptus and Pinus predominate.

Figure 1
Municipality of Paraopeba in the central region of state of Minas Gerais, Brazil, where the “quilombola” community of Pontinha is located.

2.2 Data collection and analyses

Ethnoecological information was gathered through semi-structured interviews of 30 residents and open interviews of 20 residents during the months of November 2012 to July 2014. The use of these tools allowed the research team more flexibility to deepen into topics that emerged spontaneously during the dialogue with the community (Albuquerque et al., 2010). Opened and semi-structured interviews support the establishment of confidence relationships between the researchers and community (Drumond et al., 2009). The choice of first respondent was non-probabilistic and intentional (Bernard, 2006; Albuquerque et al., 2010) because the researchers had been in contact with the community for over 10 years and established relationships of trust that enabled this selection. After the first contact, the remaining respondents were indicated using the snowball tool (Bailey, 2008).

The interview addressed the seasonal dynamics of Pequi, floral visitors, frugivores and parasites, impacts of fire on the species, and uses of this species. The information on frugivory and floral visitors was obtained from a free list (Bernard, 1988; Albuquerque et al., 2010). Participant observation was also used as residents worked during routine activities involving the Pequi, such as the gathering of fruit in the Cerrado and backyards and uses of the fruit to prepare meals and recipes. In crossing (Drumond et al., 2009) additional information was obtained from reports given by four residents. Triangulation (Drumond et al., 2009) allowed better evaluation of the data obtained.

The resultant information regarding traditional knowledge about the Pequi tree was shared with the local community in a workshop with 11 residents. These results were documented in a video that was discussed with 21 participants in another meeting, where it was possible to legitimize the information obtained.

Smith’s Salience Index (Puri and Vogl, 2005; Morais and Silva, 2010) was calculated using Anthropac 4.0 program. A higher Index value (from 0 to 1) indicate a greater consensus among the respondents on the topic studied (Puri and Vogl, 2005). Semi-structured and open interviews, participation observation, and crossing data were analyzed qualitatively.

The present study was approved by the Ethics Committee of the Federal University of Minas Gerais (nº 0388812.2.000.5149). The interviews were always preceded by an explanation about the purpose of work and a permission were given by a Term of Informed Consent (“Termo de Consentimento Livre e Esclarecido”). Recordings, field notes, and photographs were archived at the Laboratory of Socio-Ecological Systems of the Federal University of Minas Gerais (Universidade Federal de Minas Gerais).

3 Results and Discussion

Among the respondents, all were born in the Pontinha community, 19 (63%) were women, 11 (37%) were men, and their ages ranged between 17 and 83 years. The primary uses of Pequi detailed by the respondents were as follows: family food (97%), soap production (67%), oil production (37%), medical treatment (17%), and trade (3%).

In the category “family food”, the following uses of Pequi were included: prepared with rice and chicken, cooked with salt, sweet, shaken with milk and sugar (“Chocolate”), liquor, nut (consumed fresh and the sweet form), with sweet rice, with cheese, cake, and popsicle (“chup chup”).

According to the respondents, the choice of the fruit depends on the purpose of its use, and it is evaluated by the color, flavor, and quantity of the pulp, as well as by the number of seeds and the appearance of the shell. The Pequi trees that are known for the quality of their fruits are identified by reference to the house where the resident lives. The bitter fruits are locally called “marujentos” or rancid and are only used to make soap. By contrast, the sweet fruits with more pulp are called “fleshy” and are used in cooking.

The manufacture of soap from the flesh and kernel of Pequi (inner mesocarp) was mentioned by 63% (n=19) of respondents and also was recorded during the crossing. The soap has a granular appearance and dark color and is only for domestic use, which is in accordance to what was reported and demonstrated by one of the interviewees. Although the use of Pequi for the production of oil was reported in 37% of the interviews (n=11), the majority of respondents were unaware of the methods of extraction and preparation, and only one person indicated that he knew how to extract the oil from the Pequi pulp. Oliveira (2009) and Lima (2008) reported the extraction of oil from both Pequi pulp and nuts for use in cooking and traditional medicine in communities in northern Minas Gerais. These products, according to Afonso and Ângelo (2009), have a high market value compared with the “in natura” fruit, creams, and sweets. In Ceará State, Caryocar coriaceum fruits are classified by extractivists according to their size (big or small). The big fruits are more valued by buyers, and the small fruits are destined for oil production (Sousa-Júnior et al., 2013).

Pequi leaves are used for medicinal purposes, and the infusion of young leaves (shoots or “sprouts”) is used to combat flu and abdominal pain and “help the kidneys.” Rural communities in Lavras and Rio Pardo de Minas municipalities, both located in State of Minas Gerais, use Pequi nut and pulp oil to treat respiratory diseases such as bronchitis and asthma (Rodrigues and Carvalho, 2001; Oliveira, 2009).

Processed products such as Pequi liqueur, sweets, and soap have been sold locally in the past, and in most cases, sold to order. However, this practice was not observed during the present study. Other uses not mentioned by the participants, including the use of the Pequi shell as an alternative feed for cattle and fish and for manufacturing dark-brown dyes, have been reported in the literature (Bonfá et al., 2009; Oliveira and Scariot, 2010), and there may be additional alternative uses in the Pontinha community.

Among the flower visitors, bees had the highest Salience (S=0.639) and were categorized by different local names (Table 1). Hummingbirds were also identified as important floral visitors both at Pontinha (S=0.261) and by Melo (2001), in a study conducted in Distrito Federal, in the central Brazilian region. The presence of floral visitors was related to the pursuit of pollen or honey, sweet liquid, sugar, and nectar, and their categorization indicates a similar perception for the type of use, although with distinct terminology.

Table 1
Values of cultural consensus (S) for the floral visitors of the Pequi tree (Caryocar brasiliense) as cited by respondents from the Pontinha community, Minas Gerais.

	Common name	Folk name	Salience (S)
BIRDS			0.261
	Hummingbird	Beija-flor	0.261
	Passerine	Passarinho	0.025
INSECTS			0.672
	BEES	ABELHAS	0.639
	Bee	Abelha	0.367
	European bee	Abelha europa	0.156
	Bumblebee	Mamangá	0.083
	Stingless bees	Abelha que agarra no cabelo	0.050
	Bumblebee	Abelha mamangava	0.033
	Bumblebee	Besouro mamangá	0.031
	Orchid bee	Abelha preta	0.017
	Stingless bees	Abelha jataí	0.011
MAMMALS			0.017
	Bats	Morcego	0.017
	OTHER INSECTS	OUTROS INSETOS	0.050
	Wasp	Vespa	0.033
	Beetle	Besourinho	0.017
DO NOT KNOW			0.200

The light-colored flowers of the Pequi tree are associated with a strong odor and nectar production at dusk, which suggests that the primary pollinator is bats (Oliveira et al., 2008). The importance of bats as pollinators of Pequi trees is recognized in the literature (Melo, 2001; Oliveira et al., 2008; Carvalho, 2008) and by the Pontinha respondents, although the Salience Index was low for bats (S=0.017).

Answers related to frugivory were discriminate into two categories: a) animals that feed on fallen fruits and b) animals that feed on unfallen fruits. Frugivores were also grouped according to their respective Salience Indices (Table 2).

Table 2
Values of cultural consensus (S) for the frugivores of the Pequi tree (Caryocar brasiliense) that eat unfallen fruit and fallen fruit on the ground as cited by respondents from the Pontinha community, Minas Gerais.

	Common name	Folk name	S (unfallen fruit)	S (fallen fruit)
BIRDS			0.359	0.259
	Magpie	Pêga/gralha	0.167	0.067
	Parrot	Papagaio	0.146	0,077
	Parrot	Maritaca	0.126	0.033
	Passerine	Passarinho	0.067	0.050
	Toucan	Tucano	0.039	0.008
	New World Jays	Gralha	0.033	0.033
	Parakeet	Periquito	0.023	0.017
	Parakeet	Periquito maracanã	0.011	-
	Chicken	Galinha	-	0.033
	Dove	Juriti	-	0.033
	Sparrow	Pardal	-	0.033
	Guan	Jacu	-	0.027
	Hornero	João-de-barro	-	0.022
	Pigeon	Verdadeira	-	0.020
	Ruddy Ground Dove	Rolinha	-	0.011
INSECTS			0.067	0.574
	Beetle	Besouro	0.033	0.023
	Caterpillar	Lagarta	0.033	-
	Ant	Formiga	-	0.527
	Bee	Abelha	-	0.033
	Larva	Larvas	-	0.033
	Termite	Cupim	-	0.029
	Borer	Bicho que apodrece o fruto	-	0.017
MAMMALS		MAMÍFEROS	0.138	0.123
	Bat	Morcego	0.138	0.019
	Marmoset	Sagui	0.033	-
	Armadillo	Tatu	-	0.067
	Humans	Pessoas	-	0.033
	Maned Wolf	Lobo	-	0.020
	Opossum	Gambá	-	0.017
DO NOT EXIST			0.067	0.033
DO NOT KNOW			0.400	0.133

The number of animals mentioned that feed on fallen fruits (n=23) was higher than those that feed on unfallen fruits (n=13). According to Oliveira and Scariot (2010), the Pequi fruits complete ripening and have a greater concentration of vitamins and proteins three days after the natural fall, and these characteristics can attract more frugivorous species; in addition, there is greater exposure of the yellow pulp that covers the seed after the fruits fall.

The values of the Salience Indices for animals (Table 2) that feed on unfallen fruits indicate a greater importance of magpies, parrots (“maritaca” and “papagaio,” respectively), bats, and passerine birds. As for the fallen fruit on the ground, ants showed a higher Salience Index (S=0.527). Rheas, seriemas, parrots, crows, carcara hawks, agoutis, deer, opossum, and caterpillars are recognized in the literature as frugivores of C. brasiliense and possible primary dispersers (Gribel, 1986; Carvalho, 2008; Oliveira and Scariot, 2010). Ants, termites, and beetles can also be effective in removing the pulp and burying the seeds, which may favor germination (Oliveira, 2009; Zardo and Henriques, 2011).

The most cited flowering period was from August to October, and the most cited fruiting period was from October to January. The Pequi fruits begin to emerge after the flowering period, and the peak season is between December and January for certain regions of Minas Gerais (Leite et al., 2006). The time of Pequi flowering and fruiting varies according to abiotic factors and is mainly associated with temperature, humidity, and the rainy season (Oliveira and Scariot, 2010). Flowering occurs early in the dry season along with the fall of most of the leaves from June to October (Oliveira, 2009; Oliveira and Scariot, 2010).

The occurrence of occasional Pequi fruits was mentioned by 93% of respondents (n=28), and it refers to the irregular and unpredictable behavior of several trees that blossom and bear fruit outside of the expected time, generally occurring from June to August. The interviewees indicated that variations in rainfall and temperature are the environmental factors that influence the appearance of occasional fruits. Such occasional harvests also occur in the municipality of Itumirim, southern Minas Gerais, although there is a much lower abundance of fruit in the months of July and August compared with that of the normal harvest season (Oliveira, 2009).

Biannual fruit yield cycles with major and minor crops were also mentioned by respondents, and the intensity and frequency of rainfall were indicated as the major factors responsible for higher productivity. Alternating productivity of C. brasiliense between years has been reported in the State of Goiás by Santana and Naves (2003), in Minas Gerais by Oliveira (2009), and in the Federal District by Zardo and Henriques (2011), and such productivity is generally associated with flutuations in rainfall. According to Pontinha respondents, the time required for a Pequi tree to begin fruiting is 3 to 20 years, which is the time required to reach a height between 2.5 and 5.0 m. The Pequi tree can require up to 28 years before it begins producing fruits; however, with proper care, this time can be reduced to 8 years (Oliveira, 2009).

The occurrence of disease or parasites in Pequi trees was mentioned in 37% of the interviews (n=11) and included pests that bore into older trees, caterpillars that eat the leaves or stem and root, leaves that turn purple, and the bird herb and “vigueira” that fatally invade the roots inside the Pequi tree. The caterpillar belonging to the family Cossidae (Lepidoptera) is recognized as a borer into the C. brasiliense trunk (Leite et al., 2011), and the fungal species Colletotrichum acutatum causes the disease anthracnose on Pequi leaves (Anjos et al., 2002). One respondent claimed that it was rare for Pequi to become sick because “Pequi is a healthy tree.”

Regarding the Pequi fruit, “caterpillar holes” or “caterpillars that rot the fruit” and “fungi” were the most frequently reported damage; “beetles” and “black spots” in the shell were also mentioned. Caterpillars of the genus Carmenta cause the fruit to drop prematurely, which renders the fruits unsuitable for consumption (Lopes et al., 2003). The predation rate of seeds (inner mesocarp) by lepidopteran recorded by Oliveira (2009) is approximately 5%. The author observed that, during flowering, butterfly larvae cause losses of more than 50% of the crop production. However, Oliveira (2009) also added that ants live in Pequi trees and work as guardians, protecting the tree against butterflies and other insects.

Most of the respondents perceived a negative influence of fire on the adults or young individuals of C. brasiliense. According to them, young and mature individuals were the most adversely affected by fire, which was also observed by Oliveira (2009), because fire compromises the trees' growth and reproduction and may lead to death. Although Pequi can resist fire events that are not intense (Medeiros and Miranda, 2005), the mortality rate, according to Whelan (1995), is higher in smaller individuals, which can be attributed to certain traits of younger individuals, such as a thinner bark, as noted in the interviews. Medeiros and Miranda (2005) point out that the diameter of the individual is the determining factor for the species survival in Cerrado fire events and smaller and shorter plants can survive if the stem diameter is greater.

4 Conclusion

The “quilombola” community of Pontinha has broad ecological knowledge regarding C. brasiliense as well as the importance of this species for local use besides its potential as a source of alternative income. Local knowledge about Pequi supplements the information available in the literature. This fact reinforces the importance of ethnoecological research associated with population ecology and socioeconomics studies. Such complementarity will support the viability analysis of the wider use of Pequi by Pontinha's community, especially when the “minhocuçus” extractive activity is reduced.

Given the process of socio-cultural and economic changes ongoing in the region of this study, understanding the traditional knowledge is fundamentally important for constructing a management proposal for the Pequi and for maintaining the Cerrado’s environmental services.

Furthermore, in future management plans of C. brasiliense, the effects of climate change on the fruit productivity and other direct threats (such as land use changes and burning) to the Cerrado vegetation should be considered, in addition to the impacts of increased extraction.

Acknowledgements

We thank the Pró-Reitorias de Extensão (ProEx) and Pesquisa (PRPq) from Universidade Federal de Minas Gerais and Programa de Pós Graduação em Ecologia, Conservação e Manejo da Vida Silvestre. We are also grateful to the Programa de Extensão Universitária do Ministério da Educação (PROEXT MEC-2013) and Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) for the financial support and Floresta Nacional de Paraopeba for the logistical support. Special appreciation is extended to the Pontinha community for participating in this study.

• (With 1 figure)

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Publication Dates

• Publication in this collection
  05 Apr 2016
• Date of issue
  Apr-Jun 2016

History

• Received
  04 Nov 2014
• Accepted
  09 Feb 2015