http://hdl.handle.net/1834/91 2013-05-21T07:42:14Z 2013-05-21T07:42:14Z Osore, M. Fiers, F. Daro, M.H. http://hdl.handle.net/1834/1081 2012-05-09T15:08:19Z 2003-01-01T00:00:00Z

Title: Copepod composition, abundance and diversity in Makupa Creek, Mombasa, Kenya Authors: Osore, M.; Fiers, F.; Daro, M.H. Abstract: The taxonomic composition, abundance and spatio-temporal distribution of copepods were analysed from monthly zooplankton samples collected in Makupa creek and Mombasa Harbour (Makupa creek was until recently subjected to considerable dumping of domestic and industrial waste). At least 51 copepod species belonging to 38 genera in the families Calanoida (25), Harpacticoida (5), Poecilostomatoida (7) and Cyclopoida (1) were identified. The most common genera were Acartia, Acrocalanus, Corycaeus, Oncaea and Oithona. Copepods bloomed in the wet months of November and April (75 to 158/m3). Abundance was consistently high near the creek mouth and low within the creek enclosure. Copepod diversity (H’) was slightly higher (2.00 to 2.57) during September, November, December, January, May and June and lower (1.30 to 1.95) in the remaining months. Evenness (J) was, however, relatively constant (0.67 to 0.84) during the entire sampling period. These results point to suppressed copepod diversity and abundance in Makupa Creek, and possible reasons for this, which may include environmental degradation caused by pollution, are presented.

2003-01-01T00:00:00Z http://hdl.handle.net/1834/1662 2012-05-18T18:49:13Z 2003-01-01T00:00:00Z

Title: Семнадцатая сессия Комитета МОК по международному обмену океанографическими данными и информацией (МООД-XVII) Abstract: Настоящий документ, в котором после вводной части приводятся все решения, принятые Комитетом МОК по международному обмену океанографическими данными и информацией на его семнадцатой сессии, имеет следующие разделы: Раздел 1: Решения, принятые Комитетом по МООД по каждому из пунктов повестки дня; и Раздел 2: Резолюции и рекомендации, принятые Комитетом по МООД. Рабочее резюме имеется на английском, французском, русском и испанском языках. Настоящий доклад представляется на одобрение 22-й сессии Ассамблеи МОК в июне 2003 г.

2003-01-01T00:00:00Z Mwaluma, J. http://hdl.handle.net/1834/34 2006-11-10T12:39:38Z 2002-01-01T00:00:00Z

Title: Pen Culture of the Mud Crab Scylla Mangrove System, Kenya Authors: Mwaluma, J. Abstract: A pen culture system of the mud crab, Scylla serrata was introduced in Mtwapa mangrove creek with the aim of finding an alternative source of income and food for the local communities, who practice artisanal fishery in the creek. Other objectives were to motivate the interaction between scientists and the community through technology transfer, and to collect scientific data necessary for maintenance and management of the culture system. Pen construction took place from October 2000 -January 2001. The pen was located in the intertidal area and measured 800 m2. It was constructed and fenced using uzio (fish trap) material made of mangrove poles and wood. Stocking of the pen with seed crabs occurred from February-May 2001. Local sources was used to obtain a total of 1697 crab seeds which were measured (carapace length and width), weighed and sexed before stocking. The crabs were fed with trash fish obtained from a local fish processing plant. Feeding was conducted once daily, preferably at high tide. Salinity of the pond ranged from 12.8 to 35 ppt; temperature between 25 and 36 degrees C, pH from 7.95-8.25 and dissolved oxygen (DO) from 2.65-4.00 mgn. Harvesting of the crabs started after 4 months from date of stocking. Additional activities that occurred in the pen were planting of suitable mangrove seeds (Rhizophora mucronata and Avicennia marina) in the bare areas of the pen. These provided canopies for the crab as well as reforesting the area. Description: Research Group: Kenya Marine and Fisheries Research Institute, P.O. Box 81651, Mombasa. KenyaE-mail: jmwaluma@kmfri.co.ke

2002-01-01T00:00:00Z Kimani, E.N. Mavuti, K.M. http://hdl.handle.net/1834/39 2006-11-10T13:29:47Z 2002-01-01T00:00:00Z

Title: Abundance and Population Structure of the Blacklip Pearl Oyster, Pinctada margaritifera l. 1758 (Bivalvia: Pteriidae), in Coastal Kenya Authors: Kimani, E.N.; Mavuti, K.M. Abstract: Pearl oysters are an important marine resource within the Indo-Pacific oceans. They are widely cultured for the production of black pearls, their flesh is eaten, and their shell, known as mother-of-pearl (MOP) is used in the ornament and button industry. The blacklip pearl oyster, Pinctada argaritifera L., has been harvested from East Africa for MOP for decades. A survey within nearshore habitats in Kenya showed that Pinctada margaritifera is widely distributed in shallow lagoons, bays and channels. Other oyster species found during the survey were the wing oyster, Pteria penguin, occurring in deep channels in Shimoni and Mombasa, and Pt. chinensis, within lagoons and channels in Malindi, Mombasa and Shimoni. Pinctada margaritifera was most abundant in Gazi Bay within sheltered back reefs and lagoon, and on an intertidal reef flat and back reef in Shimoni. Mean abundance and sizes declined with depth. The abundance of Pi. margaritifera in Kenya was higher than reported in the Pacific Islands and similar to abundances reported in India. The overall mean (34 mm) and maximum (154 mm) sizes were lower than those reported in the Pacific Ocean, but similar to sizes in India and the Red Sea. The oysters matured before reaching 40 mm (dorsal-ventral length), principally as males. Male sex expression was dominant, and more so in samples from moorings and jetty fouling where density was exceptionally high. The high population densities, high temperature variation and high suspended matter of relatively poor quality in the nearshore shallow lagoon environment may explain the observed life history pattern observed in the oyster populations. This study is the first comprehensive report on pearl oyster populations in Kenya. Description: Research Groups: Kenya Marine and Fisheries Research Institute, P.0. Box 81651, Mombasa, Kenya Department of Zoology University of Nairobi, P.O. Box 30197, Nairobi, Kenya

2002-01-01T00:00:00Z