Many interrelated fields of study are included under the general heading of fishery research, including investigations of the distribution and natural history of fish, the size and composition of stocks, and the extent and causes of fluctuations in stocks. One of the chief objectives of this science is to achieve sufficient understanding of the factors influencing fish stocks to be able to predict reliably the long-term effects, on the quantities of fish caught, of varying the methods and intensity of fishing. Much relevant information derives from fishery statistics regarding the quantities of fish landed from each area at various times, the numbers and types of fishing boats, the fishing gear used and the duration of fishing. Additional biological data can be obtained from sampling the catches to determine the numbers of each age and size, and the presence of ripe or spent fish. The following is a brief summary of some of the methods used.
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Lets start by identifying what exactly certain boats are. Sometimes the terminology can get lost on beginners, so well look at some of the most common boats and what theyre called. These boats are exactly what the name implies. They are meant to be used for fishing. Most fishing boats are powered by outboard motors, and many also have a trolling motor mounted on the bow. Bass boats can be made of aluminium or fibreglass.