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Fish stocks. Fish stocks are subpopulations of a particular species of fish, for which intrinsic parameters (growth, recruitment, mortality and fishing mortality) are traditionally regarded as the significant factors determining the stock's population dynamics, while extrinsic factors (immigration and emigration) are traditionally ignored.
A fishery is an area with an associated fish or aquatic population which is harvested for its commercial or recreational value. Fisheries can be wild or farmed. Population dynamics describes the ways in which a given population grows and shrinks over time, as controlled by birth, death, and migration. It is the basis for understanding changing ...
Stock assessments provide fisheries managers with the information that is used in the regulation of a fish stock. Biological and fisheries data are collected in a stock assessment. A wide array of biological data may be collected for an assessment. These include details on the age structure of the stock, age at first spawning, fecundity, ratio ...
A significant factor contributing to the depletion of the cod stocks off Newfoundland's shores was the introduction of equipment and technology that increased landed fish volume. [5] From the 1950s onwards, new technology allowed fishers to trawl a larger area, fish more in-depth, and for a longer time, with the catches peaking in the 1970s and ...
Fisheries management. The goal of fisheries management is to produce sustainable biological, environmental and socioeconomic benefits from renewable aquatic resources. Wild fisheries are classified as renewable when the organisms of interest (e.g., fish, shellfish, amphibians, reptiles and marine mammals) produce an annual biological surplus ...
Depensation. In population dynamics, depensation is the effect on a population (such as a fish stock [1]) whereby, due to certain causes, a decrease in the breeding population (mature individuals) leads to reduced production and survival of eggs or offspring. [2] The causes may include predation levels rising per offspring (given the same level ...
The Common Fisheries Policy ( CFP) is the fisheries policy of the European Union (EU). [ 1] It sets quotas for which member states are allowed to catch each type of fish, as well as encouraging the fishing industry by various market interventions. In 2004 it had a budget of €931 million, approximately 0.75% of the EU budget. [citation needed]
Fisherman Siem Huat has seen fish stocks dwindle in recent years in Cambodia's majestic Tonle Sap Lake, and with them, his family's sole source of income. Experts say extreme weather brought by ...