Bird-spiders (Arachnida, Mygalomorphae) as perceived by the inhabitants of the village of Pedra Branca, Bahia State, Brazil

Neto

Description

This paper deals with the conceptions, knowledge and attitudes of the inhabitants of the county of Pedra Branca, Bahia State, on mygalomorph spiders locally known as 'caranguejeiras' (bird-spiders). It is launched here a new filed within ethnozoology: ethnoarachnology, which is defined as the transdisciplinary study of the relationships between human beings and bird-spiders. Data were collected from February to June 2005 by means of open-ended interviews carried out with 30 individuals, which ages ranged from 13 to 86 years old. It was recorded some traditional knowledge regarding the following items: taxonomy, biology, habitat, ecology, seasonality, and behavior. Results show that bird-spiders are classified as "insects". The most commented aspect of the interaction between bird-spiders and inhabitants of Pedra Branca is related to their dangerousness, since they said these spiders are very venomous and can cause health problems. In general, the traditional zoological knowledge of Pedra Branca's inhabitants concerning these spiders is coherent with the academic knowledge.

Informations

• Publié par: biomed
• Publié le: 01 janvier 2006
• Nombre de lectures: 8
• Langue: English

Extrait

Journal of Ethnobiology and
BioMed CentralEthnomedicine
Open AccessResearch
Bird-spiders (Arachnida, Mygalomorphae) as perceived by the
inhabitants of the village of Pedra Branca, Bahia State, Brazil
Eraldo M Costa Neto*
Address: Universidade Estadual de Feira de Santana, Department of Biology, Km 03, BR 116, 44031-460, Feira de Santana – Bahia, Brazil
Email: Eraldo M Costa Neto* - [e-mail]
* Corresponding author
Published: 13 November 2006 Received: 22 September 2006
Accepted: 13 November 2006
Journal of Ethnobiology and Ethnomedicine 2006, 2:50 doi:10.1186/1746-4269-2-50
This article is available from: http://www.ethnobiomed.com/content/2/1/50
© 2006 Neto; licensee BioMed Central Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0),
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
This paper deals with the conceptions, knowledge and attitudes of the inhabitants of the county of
Pedra Branca, Bahia State, on mygalomorph spiders locally known as 'caranguejeiras' (bird-spiders).
It is launched here a new filed within ethnozoology: ethnoarachnology, which is defined as the
transdisciplinary study of the relationships between human beings and bird-spiders. Data were
collected from February to June 2005 by means of open-ended interviews carried out with 30
individuals, which ages ranged from 13 to 86 years old. It was recorded some traditional knowledge
regarding the following items: taxonomy, biology, habitat, ecology, seasonality, and behavior.
Results show that bird-spiders are classified as "insects". The most commented aspect of the
interaction between bird-spiders and inhabitants of Pedra Branca is related to their dangerousness,
since they said these spiders are very venomous and can cause health problems. In general, the
traditional zoological knowledge of Pedra Branca's inhabitants concerning these spiders is coherent
with the academic knowledge.
Preamble 1804), which lives in the Amazon forest, is up to 26 cm
Bird-spiders belong to the Mygalomorphae suborder, long [4].
Orthognatha group. Differently from the spiders of the
Araneomorphae suborder, in this group of spiders the These spiders usually dig burrows when they are
spiderchelicerae move in parallel with the longitudinal axis of lings and live in them for many years, enlarging them as
the body, there are two pairs of lungs, and their venom necessary. Once established at a site, an individual
taranglands are situated entirely inside the basal segment of the tula usually spends its life there, hunting in an area only a
chelicerae [1]. There are nearly 2.547 known species and few meters adjacent to its burrow [5]. According to Smith
they are found in all continents, except Antarctica (Paulo [5], courtship involves cautious approach by the male,
César Motta, personal communication, 2006). Consider- who touches the female with his front legs, then moves in
ing the family Theraphosidae, a total of 897 and 170 spe- a way that identifies both his gender and species. If the
cies have already been described in the world and in female is receptive to his tentative advances, she abandons
Brazil, respectively [2]. They grow up through skin her burrow and ultimately postures with her
cephalothochanges, and females still go through these changes even rax raised. She remains inactive while the male
after they are adults [3]. Theraphosa blondi (Latreille, approaches her from the front. He uses special hooks on
the first pair of his walking legs to hold the female's
fangPage 1 of 7
(page number not for citation purposes)Journal of Ethnobiology and Ethnomedicine 2006, 2:50 http://www.ethnobiomed.com/content/2/1/50
bearing chelicerae during insemination. After the sperm The medicinal use of bird-spiders has also been recorded.
have been deposited in the female's abdominal genital Among the Tzeltal from Chiapas, Mexico these arthropods
opening, the male disengages his hooks and departs are used for treating tumors. They are induced to sting the
briskly. affected area [17]. In Brazil the 'tooth' of a bird-spider is
attached around the neck in order to treat erysipelas [18],
Erroneously, mygalomorphs are referred to as tarantulas while its fangs are recommended against toothache in the
by many people, but the true tarantulas are araneomorph state of Alagoas [19]. These 'teeth' are also used as an
amuspiders of the widespread genus Lycosa [6]. The name let that is attached on a child's neck to rid it of evil eyes
'tarantula' comes from a cult in Taranto, Southern Italy [20]. Cascudo [21] recorded the usual belief that a child
where the bite of a spider (Lycosa and Latrodectus) served who wears such amulets will have a white, strong,
resistas a pretext for dionisiac reunions of a frenetic dance [7]. ant denture. In the city of Feira de Santana, Bahia State,
The symptoms of the affliction may include dizziness, the powder of a toasted bird-spider is turned into a tea and
weakness, feelings of anguish, psychomotor agitations, offered for whom suffer from asthma [22].
stomach and muscular pains, nausea and increased erotic
appetite in its acute phase [8]. This author states that Although many people consider bird-eater spiders as
tarantism is related to Saint Paul's legend of the eradica- repulsive and dangerous creatures (helped by horror
movtion of venomous creatures from Malta. In common ies such as Tarantula), there is an increasing proportion of
sense, however, the term tarantula means almost all big the world's population that actually enjoys the company
and hairy spiders. of these arachnids, since a number of them are now
popular as household pets. Unfortunately a great amount of
On the other hand, the name 'bird-spider' comes from the specimens comes from dealers who travel to tropical
fact that some mygalomorphs feed onsmall birds. The first countries searching for these large spiders [23]. This has
European explorers in South America named the spider endangered a few species, such as the Mexican red-kneed
after seeing a specimen (Avicularia avicularia Linnaeus, Brachypelma smithi (Cambridge, 1897) which has been
1758) eatinga small bird. Another reason touse this name over-collected and is now cited in the CITES Appendix II
could be that some tree spiders drop to the ground when [6].
there is danger, spreading their legs that are covered with
hair, and gliding like a little bird from branch to branch. Despite the close association between spiders and human
In Central America they are called gorse-spiders because communities, few ethnobiologists and anthropologists
of the mistaken idea that their bite can cause a horse's have paid little attention to knowledge and use of them
hoof to fall off [7]. In Colombia giant bird-spiders of the [24]. Considering that ethnozoological studies on
birdgenus Theraphosa are named rebienta-caballo or mata- spiders are rare in Brazil [25,26], this paper deals with the
caballo (killer horse) [9]. perception, knowledge and behavior of these spiders in a
small community from Bahia State, Northeastern Brazil. It
These 'big spiders' are culturally significant for different is a brief contribution towards a new branch of research,
human societies throughout the world [10]. They can be ethnoarachnology.
found in myths and legends, and usually play important
roles in daily life of many cultures [11]. In Cameroon, for Materials and methods
Fieldwork was carried out in the village of Pedra Branca,example, traditional seers use them to foretell the future:
the seer sets a container over the spider's burrow, and which is located in the East region of Bahia State,
northplaces an assortment of elaborately patterned leaf cards eastern Brazil. This settlement belongs to the municipality
with advices around the entrance. The spider has to rear- of Santa Terezinha, and it is about 13 km away from it. It
range the cards to yield such advices [12]. In Laos people is situated at the base of the Serra da Jibóia, a mountain
2 are used to eating bird-spiders. They take their fangs off, range of about 225 km of area whose peak elevation is
then they roast them in broaches, and after that they eat 805 m above sea level. It lies between 12°46' South and
them with salt or in pepper sauce. Sometimes, however, 39°32' West [27].
parts of these spiders, usually abdominal contents or the
eggs of the big females, are eaten raw [13]. The Khmer of Data were obtained from February to June 2005 by means
Cambodia are reported to eat large theraphosids deep- of open-ended interviews using the pattern techniques of
fried in oil and served on skewers [14]. The Piaroa and the the ethnographical research focused on the cognitive
Yanomamo Indians of the Amazon Basin eat roasted Ther- anthropology [28]. An Open and Clarified Consent Term
aphosa blondi and other large species, which they extract was elaborated based on the National Health Council
Resfrom their burrows [14,15]. Paoletti and Dufour [16] have olution number 196/1996, which rules the ethical aspects
summarized all available data for Amazon. of the research involving human beings. It was read to the
villagers and distributed among those who participated in
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