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Download e-book for iPad: An introduction to fish migration by Pedro Morais, Francoise Daverat

By Pedro Morais, Francoise Daverat

ISBN-10: 1498718744

ISBN-13: 9781498718745

ISBN-10: 1691972142

ISBN-13: 9781691972142

Since the ebook of The Migrations of Fish by Prof. Alexander Meek in 1916, a few books were released in this topic. besides the fact that, almost all these books basically disguise one kind of migratory mechanisms. This e-book goals to beat this predicament through offering a finished insurance of all existence historical past strategies―potadromy, anadromy, catadromy, amphidromy and oceanodromy in a single book.

The first component of this publication studies the heritage of fish migration reports, the most definitions and ideas comparable with fish migration and the most tendencies and demanding situations of fish migration study. the second one part describes the most tactics and styles linked to all migratory existence background innovations, in addition to the most difficulties linked to their conservation. ultimately, the 3rd part presents examples of the most methodologies used to check fish migration.

This ebook used to be conceived with the target to supply undergraduate and graduate scholars and researchers with a complete booklet on which they can rely.

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Extra info for An introduction to fish migration

Example text

Fishermen, fisheries industry, dam managers, water agencies, regional and national legislators). The outcomes are not immediate, but they will certainly flourish in the future. One of the most emblematic examples on environmental awareness activities related with fish migration was the celebration of the ‘World Fish Migration Day’ on May 24th 2014, where 50,000 people participated in 273 events, from 53 countries in all continents (WFMD 2014). It is certainly due to public and media perception and pressure that, in some countries, it is possible to dismantle weirs and dams that hinder the migration of diadromous or potamodromous fish (McAllister et al.

Winter refuge migrations: Overwinter ecology of stream-dwelling fishes is perhaps the least understood aspect of their life history. Many fishes occupy different habitats in winter than in summer. As water temperatures decline, fish move from summer habitat into suitable overwintering areas, often at much lower elevations (Bjornn and Mallet 1964). These lower elevation overwintering habitats may provide more benign conditions such as warmer water temperatures, less anchor ice, and more opportunities to escape predators.

The dynamics of fish populations are in turn influenced by the migrations and movements of the individual fishes it contains (Dingle 1996). A strategy can be defined as a genetically determined life history type or behavior which has evolved because it maximizes fitness of individuals and populations (Gross 1987). Fitness can be defined as lifetime reproductive success. As Gross et al. (1988) summarized, the importance of food intake for growth, decreased mortality, increased fecundity, and improved breeding success is well documented.

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An introduction to fish migration by Pedro Morais, Francoise Daverat

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