<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: temperature differences in the mantle
Explanation: I took a quiz and got it right
Answer: within the first year, within the second year
Explanation:
Many toddlers start to sit, stand and walk by the age of 9 to 15 months of age. These are because of the changes that occur in the brain and the spinal cord. By the age of two the brain develops coordination with the muscles of the body and the infant establishes balance on the feet and hip muscles becomes strong that aids in achieving the squatting position.
Similar rock types......................................
Answer: Option D
Explanation: this depends on the food source and energy they utilize
Autotrophs are organisms that obtain their food source and energy by synthesizing these themselves using raw materials and energy (energy from the sun) they do this in the process known as photosynthesis obtaining energy from sunlight and they are also classified as autotrphs due to the presence of some components/features that will enable them to be able to synthesize their food for example, plants are autotrophs and they possess chloroplants: an organelle that contains chlorophyll that helps to channel the energy of sunlight into chemical energy and as well also gives plant their characteristic green color. They are also known as producers
Heterotrophs are organisms that rely on producers or other heterotrophs to obtain their food and energy. They either depends directly or indirectly on the producers for their energy source i.e. herbivores egg goats that feed directly on plants like grass; carnivores e.g lion that feeds on the herbivores this depending indirectly on plants.
