Tsi, Evaristus Angwafo*; Tomedi, Eyango Minette; Talla Francis N and Nguimkeng Djakwour Loius 
Corresponding author: *TSI Evaristus Angwafo
Faculty of Agronomy and Agricultural Sciences (FASA) 
P.O. Box 222 Dschang, University of Dschang, Cameroon
Tel: (+237) 74 52 94 12 Tel: Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.">Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser. 
Accepted 25 th February 2011.

The determination of the status and dynamics of Hippopotamus (Hippopotamus amphibious) was carried out in
the rainy season in Faro National Park from April to September 2008. The main objective was to examine the
changing population of Hippopotamus in the park. The method of collecting data was through inventory on foot
along the Faro River and questionnaires addressed to the local population and staff of the park. A total of 525
hippopotamus were counted indicating a linear density of 5.57 animals per kilometer. However, 94.1% of this
population was within the park with a high concentration in the north. The composition of the Hippopotamus
population was 228 adults, 193 sub-adults and 104 juveniles, where females constituted 68% and males 31%.
This is an encouraging population given the decline and complete absence of this species in other areas of
Africa where they were formally in a large population. The factors that influence changes in Hippopotamus
population are estimated at 34%, 30%, 16% and 7% for fights, poaching, diseases and sport hunting respectively.
From the 110 questionnaire administered to the local population, 84% say the Hippopotamus population is
increasing and 5% say it is decreasing. Estimates from primary sources within a period of 8 years (2000-2008)
indicate that the rate of increase is at 10.63%. Therefore, the Hippopotamus population can be judged to be
increasing, but further studies are enquired to meet the national goal in the national directives of effectively
managing hippopotamus through the conservation of biodiversity. The study recommends the installation of
“miradors” in the park and along the Faro River and the intensity of patrols in the rainy season.

The degradation of the environment and the loss
of biodiversity preoccupy humanity at the start of the third
millennium (Western, 1992). Of the 4,170 mammal
species censured in the world, 1,570 (36.6%) originating
from the African continent and Cameroon habours 409 of
these species making 9.8% and 26% of the world and
Africa respectively. These Cameroonian species counts
11 endemic and 27 threatened species among which is
the Hippopotamus (Hippopotamus amphibious).
The Hippopotamus, also called water horse, is an African
emblem. It is the third largest terrestrial mammal after the
Elephant (Loxodonta Africana) and the Rhinoceros
(Diceros bicornis). Studies conducted by the Saint Louis
mals/hoofedmmmal/hyppopotamus Last date of access
20.01.2011), show that hippopotamus has a great
contribution on aquatic animals since they are utilizing
terrestrial and aquatic habitats. In fact, when hippos return
to the river they help the fish who swim there as they
defecate in the water and their tail acts like a “manure
spreader”, shooting dung every where. Small fish, snails,
and other little critters gobble up the nutrient rich dung and
are themselves eaten by larger fish. They therefore play a
key role in the food chain, food web and transformation of
the vegetation and habitat of living organisms.
Restrictions on the international trade on
Elephants tusk has lead to the increase in the exploitation
of Hippopotamus canines and (IUCN, 2006) says this
increase is at 53%. Based on these affirmations, the
Hippopotamus is classified as vulnerable on the red data
list of IUCN and placed on annex II of the International
Convention on Trade on Endangered Species (CITIES).
The reasons why this research is very significant is the
fact that the distribution of the Hippopotamus is influenced
by factors which are genetic, reproductive, environmental,
habitat, food availability, climatic, density and population.
Etringham, (1999) says, Cameroon is one of the countries
were little information has been published on the

population tendency of hippopotamus. The government of
Cameroon has recognized this importance and has placed
the Hippopotamus in Class A (species with integral
protection) in the national classification of wildlife species.
Ten years ago Zibrine, (2000) counted 647 Hippopotamus
in the Faro National Park and no other studies had been
conducted especially on the evolution, abundance and
factors influencing changes in their population.
The following research questions were designed:
1. What is the number, density and distribution of
Hippopotamus in Faro National Park?
2. What is the sex and age structure of the
3. What are the factors influencing the fluctuation of
the population?

Specifically, the following objectives were developed:

• Determine the number, density and distribution of
• Determine the sex and age structure
• Examine the factors influencing the variations in
the number of Hippopotamus
The importance of this study will be to contribution
scientific data on the population of Hippopotamus and
their changes in the rainy season in Faro national park.

The Faro national park still holds a non-negligible
hippopotamus population compared to other protected
areas in north Cameroon (Benoue and Bouba Ndjida
national parks). This population has witness an increase
of 85 hippopotamus from 2000 to 2008. This African
emblem needs to be preserved in Faro national park to
maintain the biodiversity, maintain ecological equilibrium
as they participate in the fertilization of water and land and
a source of revenue from tourism. Other studies need to
be done to determine with precision the bio-indicators
(indices, biomass, threshold values, standards for
harvesting, annual growth rate, etc) of the population of