We cannot imagine the existence of any organism without the environment. Organisms have to live in the environment, interact with the various beings in the environment, engage in interactions and survive by building inseparable relationships. Even the slightest change in an element of the environment requires the organism to adapt to the changed context. That … Read more
Migration is one of the innate behaviors of animals. Some animals move from their permanent habitat to temporary habitat for a certain period of time to escape various biological needs or environmental adversities and return to permanent habitat at the end of time. This particular phenomenon is called migration. Migration of fishes have special importance … Read more
Most aquatic farming systems are intensive or semi-intensive, especially for fish and shrimp. Intensive fish farming requires extra food for stocked fish. As a result, the cost of such cultivation is high. The main purpose of fish feed preparation and formulation is to mix nutritional value and balanced ingredients which keep the growth, reproduction and … Read more
Osmosis is the process by which the solvent enters the area from low density to high density. In this case, two different densities of a solution are separated by a differential permeable membrane. The kidneys play an important role in the osmoregulation of fish. However, most of the osmoregulatory functions are performed by other organs … Read more
Labeo rohita is the important food fish that belongs to the carp family Cyprinidae under order Cypriniformes of Class Actinopterygii. It is also known as rui, rohu, or roho labeo. It can tolerate a wider temperature range, and it is the most adaptable and important cultured fish species in Bangladesh, India, Pakistan, and Myanmar. They … Read more
There are many animals that have adapted to living in water, but mammals have evolved a range of traits that give them a competitive advantage in the water. The aquatic adaptations of mammals are more diverse than the adaptations of any other group of animals. Mammals can be found in all kinds of water bodies, … Read more