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|  Fish capture technologyencompasses the process of catching any aquatic animal, using any kind of a fishing methods, normally operated from a vessel. The range of fishing methods is from a simple and small hook attached to a line to large and sophisticated midwater trawls or purse seines operated by large fishing vessels. The targets of capture fisheries might include aquatic organisms from small invertebrates to large tunas and whales, which might be found anywhere from the ocean surface to the bottom at 2000 meters water depth. | | |  The large diversity of targets in capture fisheries and their wide distribution requires a range of technologies for efficient harvest. Such technologies have developed around the world according to local traditions and not least technological advances in various diciplines. Major advances in recent decades have been made in fibre technology, along with the introduction of other modern materials, which have made possible, for example, major changes in the design and size of fishing nets. The mechanization of gear handling has vastly expanded the scale on which fishing operations can take place. Improved vessel and gear designs, using computer-aided design methods, have increased the economics of many fishing operations. The development of electronic navigational aids and of fish detection equipment has led to the more rapid location of fish and the lowering of the unit costs of harvesting. Developments in refrigeration, ice-making and fish processing equipment have contributed to the design of vessels capable of remaining at sea for extended periods. While these technologies are available, those actually introduced in many small-scale fisheries may amount to no more than motorizing a dugout canoe, use of modern, lighter gear or introducing the use of iceboxes to ensure the quality of the product landed. | | | | The impact of such changes, however, has considerably increased landings and the earnings of fishers, and underlines the need for effective management to prevent excessive fishing effort. The emphasis of much recent technical innovation has been focused on greater selectivity of fishing gear and on gear with less impact on the environment. | | | | |
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