Invasion Biology

Wednesday, January 24, 2007

THE AFRICAN GREEN MONKEY

Cercopithecus aethiops is the species of the class mammalian and order primates. C. aethiops is also known as the vervet monkey. The vervet monkeys weigh between 2.7 kg and 8 kg. This species has a lifespan of 22 years. The vervet monkeys are abundant type of monkeys and found in the large part of Africa. In most cases, they are used as the laboratory animal for testing different drugs if they will work for a particular disease [Matthews and Brandt 2004].

The vervet monkeys live in different types of habitats and amongst human, they prefer to live in riverine woodlands. This animal species are omnivorous animals preferring grass for their diet. However, this species prefer grasses, they also feed on arthropods and small vertebrates like lizards, etc. in order to gain protein in their body [Cheney and Seyfarth 1982].

The movement of vervet monkey is the same in the trees and on the ground. They move quardropedally. The vervet monkey gives birth to one offspring and has a gestation period of twenty-two weeks. The social life of the vervet monkey is different among the males, females, and juvenile males and adult males. The females adult interact with their close relatives and they allow other females to take care of their infant. The juvenile males care for their siblings and adults males does not have interest in the infants [Cheney and Seyfarth 1982].

The vervet monkeys use different types of methods for communication, namely, vocal communication, visual communication and tactile communication. The vervet monkeys can use a vocal communication to alert their members about the predators. This species use visual communication for starring, penile display, head-bobbing etc. The tactile communication includes nose-to-nose greetings. The advantageous method of communication is the vocal method because every monkey can be alert even if the monkeys are not close to each other.

The African green monkey became invasive on the Island because of their cropraiding habitat. It was suggested that this species were introduced by the ships that were running the West African Slave trade. The species were favoured at its invasion because they were not disturbed by anything e.g predators. As a result, they multiplied.

REFERENCES:

Cheney, D.L. and Seyfarth, R.M. 1982. Recognition of Individuals within and Between Free-ranging Groups of Vervet Monkeys. American Zoologist Vol. 22, 519-526.

Matthews S. and Brandt K. 2004. Africa Invaded: The growing danger of invasive alien species Global Invasive Species Programme 2004. Available from: http://www.gisp.org/casestudies/showcasestudy.asp?id=96&MyMenuItem=casestudies&worldmap=&country=


Ms Evelyn Maleka
CILLA CSIR
P.O. Box 395
Pretoria,
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Tel: (012) 841 2133/2807
Fax: (012 )841 4405
Email: emaleka@csir.co.za
http://malekaevelyn.blogspot.com/

4 Comments:

  • Article should focus on where it has been introduced e.g. Barbados and why it has become a pest. An analysis of the circumstances is required here that favoured its invasion.

    By Blogger Rich Knight, at January 24, 2007 2:13 PM  

  • Echoing again, darnit!

    What you have here is a collection of facts about the vervet monkey - but none of them pertain to whether or not it's invasive, and the circumstances in which it may be.

    Consider your target audience - this is an Invasion Biology blog...

    By Blogger NcK, at January 24, 2007 3:09 PM  

  • Thanks for the guide.

    The African green monkey became invasive on the Island because of their cropraiding habitat. It was suggested that this species were introduced by the ships that were running the West African Slave trade. The species were favoured at its invasion because they were not disturbed by anything e.g predators. As a result, they multiplied.

    http://www.gisp.org/downloadpubs/gisp%20africa%202.pdf

    By Blogger Maleka Evelyn, at January 24, 2007 3:19 PM  

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