http://hdl.handle.net/1834/1337 Search the Channel search http://www.oceandocs.org/simple-search http://hdl.handle.net/1834/3205 Title: From Farming to Fishing: Marine Resource Conservation <br/> <br/>Authors: Versleijen, Nicole; Hoorweg, Jan <br/> <br/>Abstract: This paper examines the arrival of a new group of fishermen on the Kenyan coast and what this has meant for the state of fishery resources. It reviews four subject areas: access and the number of fishermen; the fishermen’s identity; the choice of fishing gear; and the fishing grounds selected. Data were collected from a small number of fishing households in the villages of Uyombo and Takaungu in Kilifi District, using mainly qualitative research methods. Local households on the Kenyan coast face increasing pressure on land as well as on marine resources. The declining economic situation and greater pressure on land have made people turn to fishing as an income-generating activity. This group of fishermen is referred to as the ‘new’ generation of fishermen as they have been involved in fishing for only one or two generations (including the current one) in contrast to the ‘old’ generation from families who have been fishing or in fishingrelated activities for much longer. The old generation of fishermen and their households have also diversified their incomes, with many fishing households turning to farming, for example, with women and grown-up children involved in various activities. The new generation of fishermen, mainly of the Mijikenda population group, has often been blamed for the loss of traditional access regulations and for using harmful fishing gear. This paper discusses the new generation of fishermen and their identity as they perceive it and relates this to employment generation as a policy measure for marine conservation. Mon, 29 Oct 2007 22:58:59 GMT http://hdl.handle.net/1834/3204 Title: Structure and Dynamics of demersal assemblages on the continental shelf and upper slope off Ghana, West Africa <br/> <br/>Authors: Koranteng, K.A <br/> <br/>Abstract: Using two-way indicator species and detrended correspondence analysis, species on the continental shelf and upper slope of Ghana were classified into 6assemblages. The structure of the assemblages is determined primarily by depth and type of sediment on the seabed. There are clear faunal discontinuities around 30-40, 100, and 200m depth. The dynamics of the assemblages are influenced by physico-chemical parameters of the water masses, mainly temperature, salinity and dissolved oxygen, which are periodically modified by the seasonal coastal upwelling that occurs in the area. The observed changes in the composition and relative importance of species in the assemblages can be related to increased fishing activity and environmental forcing. Sun, 29 Oct 2000 22:58:59 GMT http://hdl.handle.net/1834/3203 Title: Technical publication of Nigerian Institute for Oceanography and Marine Research (NIOMR) Lagos Nigeria <br/> <br/>Authors: Ayinla, O. A. <br/> <br/>Abstract: The Nigerian Institute for Oceanography and Marine Research (NIOMR) established in November 1975 by the Research Institute Establishment Order of 1975 has the responsibilities to conduct research into the resources and geological/geophysical, chemical and physical characteristics of the Nigerian territorial waters and the high seas. NIOMR also conducts research to fish utilization as well as Extension and Liaison Services. Since the establishment of NIOMR, a total of 35 occasional papers and 109 technical papers had been published to expose the research findings of the Institute to various stakeholders. These technical papers were previously published as standalone papers. In order to improve the quality, publication and circulation of scientific information from the Institute NIOMR’s Technical Committee was set up in June 2007. I am happy to note that the new Technical Publication Committee has coordinated the publication of this new NIOMR Technical Paper Series as volumes. Each Volume which may consist of 5 or more papers will be subsequently published on a half yearly basis. The papers in this new series have been critically peer reviewed both internally and by external scientists. I hope that with the release of this maiden technical paper series, NIOMR scientists will seize the opportunity to make their research findings available to the scientific community, educational, government and private stakeholders. It is my believe that this publication and subsequent editions, will further extend the frontiers of knowledge and contribute to the body of scientific information needed for the socio-economic development and sustainable management of Nigeria’s marine coastal environment and resources. Mon, 29 Oct 2007 22:58:59 GMT http://hdl.handle.net/1834/3007 Title: Evolution du pH et de la température au cours de la transformation artisanale du cymbium (voluté). Essai sur les perspectives de valorisation du produit transformé <br/> <br/>Authors: Diouf, A. <br/> <br/>Abstract: L’étude porte sur l’évolution du pH et de la température au cours de la transformation artisanale du Cymbium, ainsi que sur les perspectives de valorisation du produit transformé. Les expérimentations menées au site de transformation artisanale de Joal ont permis de constater que : Après 12 heures de séjour en bac (1ère nuit), le Cymbium est encore en phase de rigor mortis. Le pH moyen affiché à l’issue de cette première nuit est de 7,6 ; donc proche de celui du mollusque vivant ; Le pH moyen du produit fini est légèrement acide et se situe entre 6,3 et 6,4. Donc le yeet de Joal est très peu fermenté ; Les difficultés de séchage notées sont dues : soit au manque de maîtrise des paramètres tels que, la température, l’humidité relative et la vitesse de l’air, soit à l’absence de protection du produit en cours de séchage contre les intempéries. Les essais sur les perspectives de valorisation montrent que : 47,64% du poids du Cymbium dépourvu de sa coquille font l’objet de rejets sous forme de rebuts (surtout en milieu industriel) ; Les enzymes végétales que sont, la bromélaïne, contenue dans le jus d’ananas, et la papaïne, contenue dans le latex de papaye, ainsi que les acides organiques contenus dans le vinaigre et le jus de citron, favorisent l’acidification et accélèrent la fermentation, tout en améliorant le goût, l’odeur et la texture du produit fini ; Les meilleurs résultats sont obtenus dans le cas de la fermentation sous température contrôlée, au laboratoire, où le pH du produit fini se situe entre 4,3 et 4,7. Enfin, sur l’ensemble de l’étude, il est prouvé que les rendements obtenus pour les produits ayant subi un processus de transformation complète (dans le cas des essais sur les perspectives de valorisation) sont faibles par rapport à ceux transformés à Joal. Ces rendements vont de : 2,88 à 28,57% pour le premier groupe de produits ct 31,4 à 58,3% pour le second groupe de produits. Mon, 29 Oct 2007 22:58:59 GMT