Isaac Okyere

Dr. Isaac Okyere

orcid

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
1 July 2016 in Ocean & Coastal Management
Verified
Journal Article
Closed access
DADenis Worlanyo Aheto
Denis Worlanyo Aheto
SKStephen Kankam
Stephen Kankam
Isaac OkyereIsaac Okyere
Isaac Okyere
EMEmmanuel Mensah
Emmanuel Mensah
AOAdams Osman
Adams Osman
JMJustice Camillus Mensah
Justice Camillus Mensah

29 December 2020 in Scientific Reports
Verified
Journal Article
Open access
PDF file
Isaac OkyereIsaac Okyere
Isaac Okyere
ECErnest Obeng Chuku
Ernest Obeng Chuku
BEBernard Ekumah
Bernard Ekumah
Donatus Bapentire ANGNUURENGDonatus Bapentire ANGNUURENG
Donatus Bapentire ANGNUURENG
JBJustice K. Boakye-Appiah
Justice K. Boakye-Appiah
BCBrian Crawford
Brian Crawford
The novel coronavirus is predicted to have dire implications on global food systems including fisheries value chains due to restrictions imposed on human movements in many countries. In Ghana, food production, both agriculture and fisheries, is exempted from restrictions as an essential service. The enforcement of COVID-19 prevention protocols, particularly social distancing, has been widely reported in Ghana’s agricultural markets whereas casual observations and media reports on fish landing sites suggest no such enforcements are in place. This study aimed to provide sound scientific evidence as a basis for informed policy direction and intervention for the artisanal fishing sector in these challenging times. We employed an unmanned aerial vehicle in assessing the risk of artisanal fishers to the pandemic using physical distancing as a proxy. From analysis of cumulative distribution function (G-function) of the nearest-neighbour distances, this study underscored crowding at all surveyed fish landing beaches, and identified potential “hotspots” for disease transmission. Aerial measurements taken at times of peak landing beach activity indicated that the highest proportion of people, representing 56%, 48%, 39% and 78% in Elmina, Winneba, Apam and Mumford respectively, were located at distances of less than one metre from their nearest neighbour. Risk of crowding was independent of the population at the landing beaches, suggesting that all categories of fish landing sites along the coast would require equal urgency and measured attention towards preventing and mitigating the spread of the disease.

24 October 2012 in Sustainability
Verified
Journal Article
Open access
PDF file
DADenis W. Aheto
Denis W. Aheto
NANoble Kwame Asare
Noble Kwame Asare
BQBelinda Quaynor
Belinda Quaynor
ETEmmanuel Tenkorang
Emmanuel Tenkorang
CACephas Asare
Cephas Asare
Isaac OkyereIsaac Okyere
Isaac Okyere
In order to achieve sustainable fishing livelihoods in coastal communities, data on profitability of small-scale fisheries relative to fish species caught and gear types used by fishermen is required as part of a broader fisheries management strategy. This study was undertaken with this in mind. Interviews were conducted among 60 fishermen between February and March 2010. Economic assessment of small-scale fishing activities were done using questionnaires based on direct market pricing and contingent valuation methods. The results indicate that highly profitable fish species include Epinephelus aeneus, Sparus caeruleostictus, Dentex angolensis and Lutjanus goreensis valued at US$2.97, US$2.87, US$2.85 and US$2.63 per kilogram respectively. The less profitable species include Dasyatis margarita, Caranx crysos and Sardinella aurita valued at US$0.34, US$0.66 and US$ 0.85 per kilogram respectively. Although Sardinella aurita was among the less valuable fish species, it was the main species driving profits for the fishermen due to its high share volume among the fish catches. Findings from this study suggest high rates of exploitation, in that stocks generally cannot provide for increased economic return in the face of increased investment. This is a clear indicator that the open-access nature of Ghanaian fisheries is not sustainable, and management reform is well overdue.

1 May 2023 in Marine Policy
Verified
Journal Article
Closed access
Isaac OkyereIsaac Okyere
Isaac Okyere
ECErnest Obeng Chuku
Ernest Obeng Chuku
SDSelorm Awiah Dzantor
Selorm Awiah Dzantor
VAViolet Ahenkorah
Violet Ahenkorah
RARichard Adade
Richard Adade

1 April 2019 in Biological Control
Verified
Journal Article
Closed access
Isaac OkyereIsaac Okyere
Isaac Okyere
AKAndreas A. Kudom
Andreas A. Kudom
PSPearl Sakyi-Djan
Pearl Sakyi-Djan

1 December 2021 in Fisheries Research
Verified
Journal Article
Closed access
IOIsaac Kofi Osei
Isaac Kofi Osei
KYKobina Yankson
Kobina Yankson
EOEdward Adzesiwor Obodai
Edward Adzesiwor Obodai
Isaac OkyereIsaac Okyere
Isaac Okyere