Patrick Kwabena Ofori-Danson

Patrick Kwabena Ofori-Danson
University of Ghana | Legon · Department of Marine and Fisheries Sciences

About

24
Publications
9,400
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339
Citations
Citations since 2017
2 Research Items
201 Citations
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2017201820192020202120222023010203040
2017201820192020202120222023010203040
2017201820192020202120222023010203040
Introduction
Skills and Expertise

Publications

Publications (24)
Conference Paper
Full-text available
Documented records of cetacean utilisation in West Africa (WAF) are scarce due to several limiting factors: (i) because illegal or considered illegal in most nations; (ii) no official catch statistics of cetaceans are maintained in any WAF nation; (iii) scarcity of long-term dedicated survey effort by academics or NGOs; (iv) landings at ports are o...
Technical Report
Full-text available
The largest documented takes of small cetaceans in western Africa occur in coastal waters off Western Region, Ghana. This has temporally coincided with steadily decreasing catches of finfish, especially small pelagics, over the past decade, attributed to both climate change and indiscriminate exploitation methods. Dixcove, a key fishing port, was s...
Article
Full-text available
Tilapia is a delicacy and of economic importance among freshwater capture fisheries. Some of these tilapia species are Oreochromis niloticus and Sarotherodon galilaeus. O. niloticus has better growth rate in fresh water culture than other tilapine species such as the S. galilaeus . However, due to pollution risk, sewage water might not support the...
Article
Full-text available
This study examined measurements of poverty in small-scale fishing communities of Ghana using FGT techniques and the Sumaila Relative Poverty Indices. Findings show that poverty head-count index was between 35.5% and 50% using the Local Poverty line and up to 80% using the International Poverty line. In terms of vulnerability, irrespective of the m...
Article
Most fisheries in Africa are overexploited or are at the peak of exploitation. A key contributor to this overfishing is poor data on fisheries, inefficient management strategies and unenforced policies. Pseudotolithus species off Benin nearshore waters are mainly fished by beach seining. Unfortunately, since 1994, the production of these species ha...
Article
Full-text available
The increasing rates of sea level rise caused by global warming within the 21st century are expected to exacerbate inundation and episodic flooding tide in low-lying coastal environments. This development threatens both human development and natural habitats within such coastal communities. The impact of sea level rise will be more pronounced in de...
Article
Full-text available
The Kpong Headpond was the second created on the Volta River after Akosombo Dam, primarily as a source of hydroelectric power generation and potable water supply, and additionally, it has supported some fish production in Ghana since impoundment. The changes in fish community of the Kpong Headpond were studied to provide baseline information for st...
Article
Microbiological quality of the Ghanaian Volta clam (Galatea paradoxa) was assessed by fecal coliform and total aerobic bacteria counts. Polymerase chain reaction (PCR) with universal eubacterial 16S and 23S rDNA primers was also used to show the presence of bacteria in samples of the gut fluid and mantle tissues. The clams were found to be laden wi...
Article
Full-text available
The study of the activity concentration levels of uranium, thorium and potassium in drinking water from different locations in a gold mine in the Ashanti Region of Ghana was conducted using gamma spectrometry. The mean outdoor absorbed gamma dose rates at 1 m from the water were 0.524 nGy h, 0.422 nGy h, and 0.252 nGy h for groundwater, surface wat...
Article
The spawning and recruitment patterns of the major Cichlid fish species, including Hemichromis fasciatus, Oreochromis niloticus, Sarotherodon galilaeus, Tilapia zillii and other species, Auchenoglanis occidentalis, Brycinus nurse, Clarias gariepinus and Marcusenius senegalensis were studied for 24 months in Bontanga Reservoir, Ghana, using length-b...
Article
The Volta Clam, Galatea paradoxa Born 1778 (= Egeria radiata) occurs in the waters of the Lower Volta Estuary. It is an important source of protein for the inhabitants and fishing for clams is done to supplement income. The clam is eaten whole after frying, boiling, steaming or roasting. The gut contains many microalgae that are resident in the enc...
Article
Full-text available
The exploitation rates of eight major component fishery species, Auchenoglanis occidentalis, Brycinus nurse, Clarias gariepinus, Hemichromis fasciatus, Marcusenius senegalensis, Oreochromis niloticus, Sarotherodon galilaeus and Tilapia zillii, of gill net fishery of Bontanga reservoir, were studied from March 2004 to March 2006 based on length-base...
Article
The stock parameters of three cichlids, Oreochromis niloticus, Sarotherodon galilaeus and Tilapia zillii, which dominated the catches of artisanal gill net fishery in Bontanga reservoir were studied. Estimates of the growth and mortality parameters of the stocks enabled application of Beverton and Holt Relative yield-per-recruit (Y'/R) models to es...
Article
An assessment has been made of the stock conditions of five major component fishery species (Chrysichthys nigrodigitatus, Chrysichthys auratus, Hemisynodontis membranaceus, Oreochromis niloticus and Schilbe intermedius) exploited with illegal purse-seine (winch-net) gear in the Yeji sector of Lake Volta, Ghana. Chrysichthys nigrodigitatus was clear...
Article
Full-text available
Abstract  The fisheries of two coastal lagoons, Keta and Songor, were studied as part of Ghana Coastal Wetlands Management Project (GCWMP) aimed at sustainable exploitation of wetland resources. Fish samples were obtained with seine nets and cast net as well as from local fishermen. Water quality parameters (pH, dissolved oxygen, temperature and tu...
Article
Estimates of growth and mortality of the catfish, Hemisynodontis membranaceus (Geoffroy St. Hilaire), in Lake Volta were obtained from length composition data compiled in 1995 and 1996. The von Bertalanffy growth function (VBGF) estimates were: L∞=44.5 cm standard length; K=0.62 year−1; and t0=−0.23 years. Natural mortality rate, M, was 1.20 year−1...
Article
Synopsis Some aspects of the ecology of the freshwater catfishSynodontis (Pisces: Mochocidae) in Kpong Headpond (Ghana) were studied. Five species were encountered, namelySynodontis schall, S. gambiensis, S. ocellifer, S. velifer andS. eupterus. S. ocellifer andS. velifer were not recorded in the area before impoundment and might have entered the h...

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Projects (2)
Project
Increased absorbance of (CO2) from the atmosphere has led to the changing of the chemistry of the oceans. In addition to already existing stressors, the resultant ocean acidification poses multiple threats to marine species biodiversity and goods and services and livelihoods that depend on them. The study set out to determine possible impacts of this phenomenon on the abundance and diversity of fin and shellfish species and ichthyoplankton in the artisanal and semi-industrial fisheries, and the degree of reliance of the local fisher folks on these two fisheries. Physico-chemical parameters in the sites where fishing by an artisanal and semi-industrial vessel were carried out were collected in two different seasons. Fish samples were collected at the end of the fishing period, species identified, counted and diversity indices calculated for each fishery and season. This four year project, 2013 to 2016 is still on-going.