To Fish or Not to Fish

The concept of opportunity cost is often used to refer to the cost of actions for which alternative acts were forfeited and the expenses for items abandoned after selection. Fisheries all over the world are faced with global impact, especially by overfishing, deteriorating the environment, environmental management procedures, and climate change impacts. It is becoming increasingly difficult for fishermen to make and maintain living.

Fishology: Studies on fish, salt and freshwater fish. There are approximately 25,000 kinds of fish including hard fish, cartilage fish, sharks, skates, light fish, and chin free fish. Fish scientists are studying every aspect of fish, from classification to form, evolution, behavior, diversity, and ecology. Many scholars of fishes are engaged in aquaculture and fishing. Marine mammogramology: This is a field of interest for most aspiring marine biologists. This is a study of whales - not only families of whales and dolphins, but also fins (sea seal, sea lion and walrus). Their behavior, habitat, health, breeding and population are all under investigation. These are the most attractive creatures in the ocean; therefore, this is a very competitive field that is difficult to break due to intense competition for research funding.

Diversity of fish species is almost equally distributed between the ocean (ocean) and freshwater ecosystems. The Indian Ocean - Pacific coral reefs form the center of marine fish diversity, but the continental freshwater fish is the most diverse in the large river basin of the tropical rain forest, especially the Amazon, the Congo and the Mekong. As more than 5,600 species of fish inhabit fresh tropical freshwater, new tropical fish make up about 10% of all vertebrate species on Earth. Especially rich tourist attractions of Amazon River, such as CantãoState Park, contain more freshwater fish than Europe.