DSpace コレクション: 2018-122018-12http://hdl.handle.net/2433/2366622024-03-28T18:27:20Z2024-03-28T18:27:20ZGlutamine Repeat Polymorphism in the Exon 1 of Androgen Receptor Gene in Grasscutter (Thryonomys swinderianus)ADENYO, ChristopherKAYANG, Boniface BaborekaINOUE-MURAYAMA, Mihohttp://hdl.handle.net/2433/2366692023-01-29T08:30:54Z2018-12-01T00:00:00Zタイトル: Glutamine Repeat Polymorphism in the Exon 1 of Androgen Receptor Gene in Grasscutter (Thryonomys swinderianus)
著者: ADENYO, Christopher; KAYANG, Boniface Baboreka; INOUE-MURAYAMA, Miho
抄録: Grasscutter (Thryonomys swinderianus) has been a subject of domestication for the past several decades in West and Central Africa. In Ghana, attempts are being made to intensify the domestication efforts because grasscutter meat is a delicacy and huge agribusiness opportunities are expected. Tameness and reproductive ability are two important traits that underlie any successful animal domestication event. Androgen receptor gene has been reported to influence behaviour and fertility. The objective of this study was to identify genetic polymorphism in the androgen receptor gene that is likely to influence tameness and reproductive traits. Tissue samples were collected from a total of 116 including 81 domestic and 35 wild grasscutters in Accra and Mankessim, respectively, and genotyped at the androgen receptor glutamine repeat (ARQ) locus. Results of this study showed that ARQ ranges from six to 19 repeats and heterozygosities (H) were 0.769 and 0.778 for domestic and wild females respectively, indicating that this locus is highly polymorphic in grasscutters. As this locus influences transcriptional activity of the androgen receptor gene, these polymorphisms could influence tameness and reproductive traits in grasscutter. However, further studies are required to test the association of these polymorphisms with phenotypes.2018-12-01T00:00:00ZHunters and Guides: Multispecies Encounters between Humans, Honeyguide Birds and HoneybeesGRUBER, Martinhttp://hdl.handle.net/2433/2366702023-01-29T08:30:54Z2018-12-01T00:00:00Zタイトル: Hunters and Guides: Multispecies Encounters between Humans, Honeyguide Birds and Honeybees
著者: GRUBER, Martin
抄録: This paper discusses the relationship between humans and honeyguide birds (Indicator indicator) in the Adamaoua Region of Cameroon. Throughout Sub-Saharan Africa, the honeyguide is known to guide humans to nests of wild living honeybees that it cannot access independently. After the humans harvest the honey, the bird eats leftover larvae and comb. While the human honey hunters increase their yield of honey by collaborating with the honeyguide, the bird is able to expand on its usual diet of insects. This unique mutualistic relationship and the changes it is currently undergoing are discussed here. While honey hunting is still common in the Adamaoua, its importance has decreased in recent years as most honey is produced from bees kept in different types of beehives, mostly conical grass hives. A relatively recent phenomenon is the increasing diversification and professionalisation of the honey trade with high demand for high quality honey. As honey from wild living bee colonies is usually of a lower quality, salvaging honey from wild bee colonies is becoming less important and the interactions between humans and honeyguides less frequent. As the birds stop guiding humans if the latter do not collaborate, we must assume that the close interspecies collaboration might end in this area.2018-12-01T00:00:00ZManaging Common Properties in Cameroon's International Coastal Area: Patterns of Coexistence between Local Communities and the Beninese and Nigerian FishermenSOCPA, Antoinehttp://hdl.handle.net/2433/2366682023-01-29T08:30:54Z2018-12-01T00:00:00Zタイトル: Managing Common Properties in Cameroon's International Coastal Area: Patterns of Coexistence between Local Communities and the Beninese and Nigerian Fishermen
著者: SOCPA, Antoine
抄録: Coastal resources fulfill important economic and cultural functions for populations. This article focuses on the ecological challenges related to the exploitation of fishery resources by fishermen of Cameroon, Benin and Nigeria in the southern coastal region of Cameroon. In such an international socio-cultural microcosm where community actors from those three countries coexist, the strong anthropogenic pressure on ecological resources generates many challenges, notably compliance with regulations and conflicts in fish and fauna exploitation. At the same time, collaboration in the context of natural resources exploitation allows an exchange of experience and expertise. There also are demographic pressure, lowscale urbanization, unemployment, pollution, and loss of natural resources within communities. This article examines the interactions between different stakeholders involved in resource exploitation as well as the collaboration and the conflicting situations arising in this context. It also traces the different rules of laws governing access to forest, wildlife and fisheries resources in Cameroon.2018-12-01T00:00:00ZCover, Contents, Information for contributorshttp://hdl.handle.net/2433/2366672023-01-29T08:30:53Z2018-12-01T00:00:00Zタイトル: Cover, Contents, Information for contributors2018-12-01T00:00:00Z