<u>Controlling disease in commercial fisheries</u>
Explanation:
Disease outbreaks among fishes reared lead to economic loss to the fish farmers. Optimal conditions of the pond should be maintained to prevent disease spreading.
Control of disease is very challenging because fishes are cultivated in aquaponds at high density which increases direct contact among fishes making way for spread of the disease.
Natural predators will remove infected fish quickly but manual methods are time consuming and not effective.
Various steps which can be followed for prevention of diseases like good water quality, nutrition and sanitation facilities, stocking and storing of fish, recording each detail.
At the same time, disease control can easily be done by reducing the density of the stocks, application of vaccines and antibiotics and other drugs, mechanical administration of drugs, use of probiotics etc.
Answer:
The correct answer is option B) "is the worst oil spill in US history, causing damage to marine and coastal ecosystems".
Explanation:
The explosion on the Deepwater Horizon/BP MC252 drilling platform in the Gulf of Mexico on April 20, 2010, cause the lost of 11 workers and cause major damage of the environment. This disaster is considered the worst oil spill in US history, causing damage to marine and coastal ecosystems. About 4.9 million barrels of crude oil were spilled, which makes it the largest marine oil spill in US history.
Continue with the project I’m not sure though
Answer:
Option A, Fixed quota models are risky because slight miscalculations can result in fish population extinction
Explanation:
Some of the major drawbacks of modelling fishing are as follows –
a) The fixed quota model is very risky as a miniscule change in attributes can result into extinction of fish.
b) On the other hand fixed effort harvesting can decrease the risk of fish population extinction
Hence, option A is correct
