Harrison C Karisa

• WorldFish

The effect of hot smoking conditions was investigated on the chemical composition and quality criteria of six fish species collected from Lake Nasser, Egypt. The results revealed that fresh Oreochromis niloticus, Lates niloticus, Hydrocynus forskalii, Alestes dentex, Mormyrus spp. and Chrysichthys spp. contained 79.39, 78.46, 75.83, 74.95, 69.4...

The COVID-19 pandemic caught the world unprepared, with containment measures impacting both global supply chains and agri-commodity flows. The public health crisis raised some urgent questions: “how can fish and other aquatic foods and supply chains be prioritized as health-related interventions to avert both a malnutrition crisis and gender inequa...

Lake Nasser, a large man-made tropical reservoir, is located in the southern part of Egypt. The lakes’ fisheries have undergone a steady decrease during the last 10 years obscuring its potential for sustainability. Fisheries assessment study based on the fishing activities is essential to attain reliable information for construction a management pl...

Egypt faces multiple interlinked challenges such as unemployment, poverty and gender inequality that pose tremendous barriers in the current efforts to achieve sustainable development. Aquaculture is a primary sector of the economy that has high potential to not only for provide nutritious food, but also to contribute to the national economy. The a...

Intraspecific morphological variation in the wild penaeid shrimps was studied in four estuarine and two shallow–water study sites in Malindi–Ungwana Bay. Three morphometric characteristics, body length, carapace length and total length describing shape of penaeid shrimps were used. Total length, the explanatory variable, brings out significant info...

Aquaculture is an important sector with high potential, not only to provide nutritious food but also to contribute to the national economy, and the aquaculture value chain provides substantial employment generation opportunities, including jobs for females and youths. The Sustainable Transformation of Egypt’s Aquaculture Market System (STREAMS) pro...

The present investigation describes the biology of penaeid shrimps and their fishery studies on morphometric length-weight relationships estimated during the two monsoon seasons from Malindi–Ungwana Bay in Kenya. A total of 1238 penaeid shrimps belonging to Fenneropenaeus indicus, Penaeus monodon, Marsupenaeus japonicus, Metapenaeus monoceros, Pena...

Although, High Dam Lake small-scale fisheries is an important source of fish for residents of Aswan in Upper Egypt, there is limited information available about the performance of small-scale fisheries value chain. Structured questionnaires with fishers, traders, and processors were used to collect input and output data at each node of the chain. F...

Warm water aquaculture is widely practiced in Kenya and is dominated by the culture of Nile tilapia (Oreochromis niloticus) (75% of total production) followed by African catfish (Clarias gariepinus) at 18%. Aquaculture started in Kenya in 1920’s and has been on upward trend until 2014 when it peaked at 24,096 MT. However, production reduced drastic...

Length and weight data of fish populations are necessary in stock assessment models and ecosystem modelling. Also, they could be used to spatially compare between different fish populations under different environmental conditions. This study provides an updated information on the length weight relationships and condition factors of six fish specie...

This study has shown that indigenous tilapia Ngege, Oreochromis esculentus from lake Victoria can grow at the same rate as Nile tilapia. This indicates that it can be promoted as an aquaculture food fish. Although O. variabilis (locally known as Mbiru) did not seem to grow as well as the other two species in ponds, the culture of the species in sma...