Pollution effects on fisheries — potential management activities

Sindermann, Carl J.

doi:10.1007/bf02414788

Cited by 6 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These responsibilities can be satisfied in many stages, one of them is to conduct critical examinations of pollution effects at levels of the individual, the local population, and the species. However, the stress from chemical pollutants can have significant quantifiable effects on resource species abundance is much more difficult to demonstrate, and has not been documented satisfactorily (Sindermann, 1980). This study is trying to outline the immediate impact on local fisheries of the incident that took place on 21 st April 2015.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Short-term Effects of Pollution Accident on Fisheries in River Nile, Egypt

Aly¹,

Shalloof²

2019

Egypt. J. of Aquatic Biolo. and Fish.

View full text Add to dashboard Cite

Fisheries This study outlines the immediate impact on local fisheries of the incident that took place on 21 st April 2015. A barge capsized in the Nile in Upper Egypt's Qena governorate after colliding with the foundations of the city's Dandara Bridge. The capsized barge was carrying 500 tons of phosphate (pre-industrial, inert material) for processing in a local factory. The study aimed to record any apparent effect of the incident on the fisheries in the immediate site vicinity and downstream. Also, it described the status quo of the fisheries around the incident location to compare it with the situation before the accident to confirm any short-term impact and to establish a baseline for any future, long-term, impact studies. Data were collected on fish assemblage structure in the incident site vicinity, the number of fishing boats and fishing methods that were applied to catch them. Furthermore, some fisheries biological parameters were assessed. The main conclusions derived from the study were that fishing in the vicinity of the incident is artisanal with small boats and simple fishing gears. The fisheries biological parameters of the area's fishery are comparable to that of other similar environs, and that the incident did not have an apparent short term effect on the fishery profile of the area. The main recommendations resulted from this study were that the impact of the incident on fish at the molecular level should be studied and that the state of fisheries in the area should be followed up to detect any long-term impact of the incident.

show abstract

Section: Discussionmentioning

confidence: 99%

Assessment of Short-term Effects of Pollution Accident on Fisheries in River Nile, Egypt

Aly¹,

Shalloof²

2019

Egypt. J. of Aquatic Biolo. and Fish.

View full text Add to dashboard Cite

show abstract

“…Pollution of water bodies due to chemicals released from industries, discharge of municipal sewage, septage, agricultural runoff containing pesticides, and so forth affect growth of the resource and quality of biomass surviving in that environment. Several investigations were made to study the effect of pollutant on the survival of biological species (Austin, 1999;Davis, Newell, & Quinn, 1999;Dubey & Hussain, 2000;Kime, 1995;Mee & Bloxham, 2002;Mercaldo-Allen, Kuropat, Greig, & Sennefelder, 1994;Shukla, Sharma, Dubey, & Sinha, 2009;Sindermann, 1980). Dubey and Hussain (2006) studied survival of species dependent on a resource in a polluted environment.…”

Section: Introductionmentioning

confidence: 99%

Optimal harvesting of a renewable resource in a polluted environment: An allocation problem of the sole owner

Pichika

Zawka

2019

Natural Resource Modeling

View full text Add to dashboard Cite

This study presents an allocation problem of the sole owner between a renewable resource harvesting and pollution reduction. Decline in the revenues due to the presence of pollution in the environment drives the harvester to allocate a part of the available effort capacity towards pollution reduction through environmental treatment and pollutant inflow reduction to improve the resource growth as well as quality of the harvest. Hence, the interest is to find an optimal effort allocation to maximize the present value of the total net revenues on infinite horizon. Therefore, an optimal harvest problem on infinite horizon has been formulated, and it is solved using the standard techniques of optimal control. Results of the study highlight that allocating a part of the available effort capacity towards pollution reduction improves not only the revenue from the harvest but also survival rate of the resource. Key results of the study are demonstrated through numerical simulations. Recommendations for Resource Managers Effect of pollution on the live stock is adverse, and it should be considered as one of the important parameters in resource management objectives. The presence of pollution in the environment affects both the resource growth and quality of biomass, resulting in reduced revenue from the harvest. Pollution is inevitable (especially in developing countries), and hence investing a part of the available effort capacity on pollution reduction (instead of harvesting by the entire capacity) can be considered as an alternative to improve the revenue. Environmental treatment and pollutant inflow reduction are some of the activities that can be applied to reduce pollution. Results of this study provide an important information for the sole owner who faces a decline in the revenue from resource harvesting in a polluted environment.

show abstract

“…Fish play an important role in the monitoring of aquatic pollution because they respond with great sensitivity to changes in their environment ( Van der Oost et al, 2003). A number of researchers have demonstrated the potential value of various combinations of fish parameters to provide evidence of toxicity or stress responses ranging from condition factor (Dutil and Lambert, 2000), fin-erosion (Sinderman, 1980;Reash and Berra, 1989), retarded fin regeneration (Verma, 2005) and otolith parameters Chukwuka, 2010, 2011) among others.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Response Patterns in Somatic and Otolith Features of Laboratory- Reared and Wild <em>Clarias gariepinus</em> Exposed to Industrial Effluent

Adeogun¹,

Babatunde²,

Chukwuka³

2013

RJASET

View full text Add to dashboard Cite

This study was aimed at comparing the responses of somatic and otolith features in Clarias gariepinus under chronic exposure conditions to industrial effluents in the laboratory for 60 days and in the wild for 6 months. Fish were collected upstream and downstream bi-monthly from a river receiving composite mixtures of industrial effluent while laboratory-reared C. gariepinus were exposed to the same effluent mixtures in 60 days static renewal/bioassay using concentrations of 6.11, 3.05 and 2.23%, respectively and control series. A total of 21 variables representing saggital otolith and somatic data from both wild and laboratory fish were subjected to factor analysis. For laboratory reared fish, PC 1 indexed as 'otolith factor', PC 2 indexed as 'condition factor' and PC 3 indexed as 'paired fin factor' accounted for 26.15, 19.01 and 12.55% of the total variance, respectively. For wild fish, otolith factor (PC 1) and condition factor (PC 2) accounted for 38.24 and 22.69% of the variance respectively. The first 3 components and the first 2 components for laboratory and wild fish accounted for more than 50% of total variance in data. Reliability index (Cronbach's alpha (α>0.70) showed that the 'otolith factor' had strong internal consistency and is reliable as a primary and viable index of stress for both laboratory and wild fish. The complementary role of condition factor in stress detection was also highlighted. The emergence of paired features (otolith, pectoral and pelvic fins) as sensitive parameters in toxicity responses may be an indication of the onset of asymmetry in these structures.

show abstract

Pollution effects on fisheries — potential management activities

Cited by 6 publications

References 4 publications

Assessment of Short-term Effects of Pollution Accident on Fisheries in River Nile, Egypt

Assessment of Short-term Effects of Pollution Accident on Fisheries in River Nile, Egypt

Optimal harvesting of a renewable resource in a polluted environment: An allocation problem of the sole owner

Evaluation of Response Patterns in Somatic and Otolith Features of Laboratory- Reared and Wild <em>Clarias gariepinus</em> Exposed to Industrial Effluent

Contact Info

Product

Resources

About