Diapositive 1

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Carolle AVOCÈVOU Prof Ir Brice SINSIN
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Contents

• 1. Background
• 2. Issues
• 3. Material and Methods
• 4. Results and Discussion
• 5. Conclusion

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1. Background
Many early ethnobotanical studies were simply to
document traditional botanical knowledge,
criticized as unscientific.
Prance et al. the first to use the term
quantitative ethnobotany
Quantitative ethnobotanical studies ? collection
plant-use information in consistent manner so ?
intra- intercultural statistical analyses
3 main methods including informant consensus or
informant-indexing (the most used) degree of
agreement among different people concerning use
of resource.
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1. Background
1.1. Pentadesma butyracea
Leaves pairs, ex-stipulate, simple and entire
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1. Background
1.1. Pentadesma butyracea
Flowers large, yellowish white or whitish red,
solitary or in cluster .
Fruits reddish-green, broadly ellipsoid and
pointed, Seeds light brown, large with flattene
d sides
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2. Issues
2.1. Issues
Benin (located at the Dahomey-Gap) P.
butyraceas natural stands limited to riparian
forests stretching along the rivers ? endangered
ecosystems (Natta 2003)
P. butyracea a multi-purpose tree and source of
NTFPs ? submitted to several pressure sources
land clearing in riparian forests for
agriculture, increasing demand of products, bush
fires and felling of its adult trees for timber.
Sustainable management strategies should be
developed and implemented for sustainable
exploitation.
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2. Issues
2.2. Objectives
Description of its current management including
diverse local knowledge One of the essential
pieces of information
A simple listing of uses of different parts of
the species without intercultural comparison
Objectives (1) to compare the main social group
s from P. butyracea parts importance point of
view (2) to make an intra and interculturally
comparison of specific uses of each P. butyracea
parts.
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Method adapted from Gomez-Beloz (2000).
Informations gathered by mean of questionnaire
through interviews with informants part of the
plant used, treated disease, method of
preparation and route of administration
Uses categorisation (Cook, 1995 Collins et al.,
2006) circulatory system disorders, digestive
system disorders, magico-mystics,
medico-religious construction, cosmetics, etc.
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1. Reported use value (RU) total number of uses
reported for P. butyracea, broken down by number
of uses reported for each plant part (SRUplant
part)
2. Plant part value (PPV) value given for a
specific plant part. PPV (RUplant part/RU).
3. Specific reported use (SU) number of times a
specific reported use is reported by the
respondent.
4. Intraspecific use value (IUV) ratio of
specific use and reported use for a plant part
IUV SUplant part/RUplant part. The
intraspecific use value allows the ordering of
use importance within a specific plant part.
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Kruskal-Wallis test performed to compare mean
Reported use value (RU) between social groups
Principal components analysis (PCA) performed o
n calculated plant part values to compare plant
parts importance and use diversity between social
groups
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4.1. Mean Reported Use Values of P. butyracea
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4.2. Plant Parts Value de P. butyracea
Ditamari Waama high value for leaves,
root-sucker, butter timber.
Natimba high value for butter
Anii, Kotocoli Fulani high value for young
leaves, pulp, bark and root
Nagot high value for bark and root.
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4.2. Plant Parts Value de P. butyracea
Social groups living in the same area shared
similar P. butyracea part values ? knowledge
exchanges
Local knowledge combination of insights of
ancestral knowledge, knowledge of other
neighbouring local peoples, practical experience,
regional scholarly traditions, and scientific or
official knowledge (Nesheim et al., 2006)
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4.3. Intercultural Convergence of Specific uses
of P. butyracea parts
Leaf male circumcision wound healing, fever,
malaria, digestive disorders
Young leaf lactogenic effects, immune
reinforcement and dentition at the newborn
Flower lactogenic effects, digestive system
disorders treatment and magico-mystic uses
Pulp chiropodist, local soap, bloated stomach
and constipation
Butter local soap body massage
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4.3. Intercultural Convergence of Specific uses
of P. butyracea parts
Bark and root stomach pain, irregular menses
Timber and root-sucker oral hygiene
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4.3. Intercultural Convergence of Specific uses
of P. butyracea parts
High IUV for a specific use synonymous of
reliability of a disease treatment.
Reliability of the disease treatment is all the
greater when IUV of the plant part for a specific
use is high for social groups that are not living
in the same geographical area.
This comparative method allows the selection of
indigenous medicinal plants parts for
phytochemical and biological/pharmacological
studies.
IUV is also useful in determining the cultural
importance of a particular plant part for a
social group in a specific usage category
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4.3. Intercultural Convergence of Specific uses
of P. butyracea parts
To make a difference between past and actual use
and knowledge of uses P. butyracea products by
the different sociocultural groups by measuring
the quantities harvested or consumed.
Reasons

(1) The use of some plant parts is seasonal and
may be greater at a particular time of the year
(2) The study was concerned only one plant
species, the time which has elapsed between two
uses was long (several months or years),
especially when the informant is not a
traditional specialized healer.
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P. butyracea is a multipurpose tree that is used
in various ways by Bassila and Toucountouna
districts people.
A quantitative ethnobotanical approach close to
informant consensus allowed allocating a value
to each species part.
Social groups that are living in the same
geographical area shared similar value of the
species parts.
Several parts of the species were most reported
for the same specific use by different social
groups (high value of IUV).
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