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All Journal Acta Aquatica: Aquatic Sciences Journal Jurnal Perikanan Universitas Gadjah Mada Journal of Agricultural Socio-Economics (JASE)
Olopade, Olaniyi Alaba
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Immunology & microbiology Materials Science & Nanotechnology Other

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Perspectives of Fishers on the Incident of Fish Kills in Coastal Waters in Rivers State, Nigeria Olopade, Olaniyi Alaba; Dienye, Henry Eyina; Oroma, Bestman Succes
Jurnal Perikanan Universitas Gadjah Mada Vol 26, No 1 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.89782

Abstract

This study was conducted to assess fishermen's perspectives on the massive fish kill incident in coastal waters in Rivers State, Nigeria. Primary data were collected using questionnaires from 101 randomly selected fishermen and the data were evaluated using descriptive statistics. The results showed that fishing was the main occupation of the respondents and the interviewed fishermen have fishing experience in the region studied and knowledge of their fishery. The results showed that 53.3 percent of fishermen attributed the strange phenomenon to pollution, while 19.8 percent of fishermen cited infection and disease as the cause of the fish kills. The majority of respondents (94%) reported that croaker fish species were particularly affected in the study area. Other observations include fish swimming on the surface or jumping onto shore and affected fish washing up on shore. The unusual appearances of the dead fish commonly reported by respondents were as follows: fin rot, open mouth, disease spots and deep blue gills. About half of the respondents (50.5%) gave a range of 1,000 - 5000 dead fish and a size class of the dead fish of more than 30 cm. Most respondents (79.2%) indicated that the government has not taken any action. Few of those surveyed reported government action on sea clean-up exercises to remove dead fish, end oil spillage and bunkering as measures put in place by the government. The study recommended partnerships between the government and fishermen and fishermen's groups as stakeholders are required to address the concerns about marine waters.
SOCIO-ECONOMIC AND PROFITABILITY ANALYSIS OF RETAILING FROZEN FISH IN RIVERS STATE NIGERIA Olopade, Olaniyi Alaba; Dienye, Henry Eyina; Anero-Nnamdi, Confidence
Journal of Agricultural Socio-Economics (JASE) Vol. 3 No. 2 (2022): Journal of Agricultural Socio-Economics (JASE)
Publisher : University of Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jase.v3i2.17606

Abstract

This study was designed to investigate the socio-economic and profitability of the frozen fish retailing business in Rivers State, Nigeria from March to August 2021. During the study period, a total of 80 frozen fish retailers were selected randomly for this study. Descriptive statistics, budgetary analysis, and multiple regression analysis were used for the analysis. The result of the findings revealed that most (62.5%) of the respondents were within the age range of 31–50 years. A majority (79.5%) of the respondents had acceptable levels of formal education. Results also revealed that fish marketing in the area is dominated by females, with most (70%) of the respondents being married. Most of the respondents had enough experience in fish marketing. The estimate of cost and return analysis shows a net income (NI) of N106, 837.56 per annum. The profitability index was 0.56, indicating that out of every Naira earned, about 56 kobo was returned to the frozen fish retailers as net income. The rate of return on variable cost was estimated to be 29.55%, which means that every Naira spent on variable inputs generates about N30 on a monthly basis, implying improved enterprise profitability. The operating ratio was 0.29, indicating greater total revenue over total variable costs, which is very good for the business, while education and fish quantity sold were positive and significant at 5 percent
Fish species composition and size structure exploited by gill net fishery in The New Calabar River, Nigeria Olopade, Olaniyi Alaba; Dienye, Henry Eyina; Oderhohwo, Ogheneforon
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Aquatic Sciences Journal, Vol. 6: No. 1 (April, 2019)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v6i1.1257

Abstract

The purpose of this study was to investigate the species composition and size selectivity of gillnets commonly used by the artisanal fishers in the New Calabar River, Rivers State, Nigeria. The data was collected during February-July 2018 from 3 sampling stations: SI Choba, S2 Ogbogoro, and S3 Iwofe all along the stretch of the river. Twenty-eight fish species were found belonging to 15 families. The prevalent families were Cichlidae, Mugilidae and Clupeidae representing 32.22%, 30.36% and 10.23% of the total catch, respectively. The most dominant species in terms of number were Liza falcipinnis (12.58%) and Mugil cephalous (12.26%) while in terms of biomass, the most abundance species were Xenomystus nigri (24.12%) and Lutjanus agennes (12.50 %). The girth and total lengths of the fishes ranged from 5.20±0.20 to 21.00±0.00 cm and 8.85±0.15 to 28.19±1.13 cm respectively. The length at first capture (L50%) for the most abundant species (Liza falcipinnis) was calculated to be 14.13 cm while that of L25% and L75% were 12.70cm and 15.25cm respectively. It was concluded that the gill nets used in the New Calabar River exploit fish species of small sizes and few medium sized specimens relative to species potential maximum size. It is therefore recommended that for an improved and sustainable exploitation fish stock of the New Calabar River, the use of gillnets of less than 25 mm-mesh sizes and other gears should be prohibited.Keywords: gill nets; species composition; mesh size; selectivity; New Calabar River
Perspectives of fishers on the incident of fish kills in Rivers State Coastal Waters, Nigeria Olopade, Olaniyi Alaba; Dienye, Henry Eyina; Oroma, Bestman Success
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 11: No. 1 (April, 2024)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v11i1.11298

Abstract

This study was conducted to assess fishermen's perspectives on the massive fish kill incident in coastal waters in Rivers State, Nigeria. Primary data were collected using questionnaires from 101 randomly selected fishermen and the data were evaluated using descriptive statistics. The results showed that fishing was the main occupation of the respondents and the interviewed fishermen have fishing experience in the region studied and knowledge of their fishery. The results showed that 53.3 percent of fishermen attributed the strange phenomenon to pollution, while 19.8 percent cited infection and disease as the cause of the fish kills. The majority of respondents (94%) reported that croaker fish species were particularly affected in the study area. Other observations include fish swimming on the surface or jumping onto shore and affected fish washing up on shore. The unusual appearances of the dead fish commonly reported by respondents were as follows: fin rot, open mouth, disease spots and deep blue gills. About half of the respondents (50.5%) gave a range of 1,000 - 5000 dead fish and a size class of the dead fish of more than 30 cm. Most respondents (79.2%) indicated that the government has not taken any action. Few of those surveyed reported government action on sea clean-up exercises to remove dead fish and end oil spillage and bunkering as measures put in place by the government. The study recommended partnerships between the government and fishermen and fishermen's groups as stakeholders are required to address the concerns about marine waters.Keyword: Coastal waters; Fishers; Mass fish mortality; Nigeria
Co-Authors Anero-Nnamdi, Confidence Dienye, Henry Eyina Oderhohwo, Ogheneforon Oroma, Bestman Succes Oroma, Bestman Success