By Geoff Allan, Gavin Burnell

For seafood creation to satisfy anticipated call for from a turning out to be international inhabitants, many extra hundreds of thousands of hundreds seafood might want to be produced. the expectancies for elevated product from seize fisheries is proscribed, so this upward thrust in creation should come from aquaculture, one of many quickest starting to be meals generating sectors on the earth. a prime constraint to the ongoing progress of aquaculture is the availability of juveniles from hatcheries.The editors and individuals evaluate present and rising applied sciences in key parts of hatchery creation, which they first lined in a prior e-book, "New applied sciences in aquaculture" (CRC Press/Woodhead Publishing, 2009). Chapters disguise advances in replica and larval rearing and deal with demanding situations in hatchery creation for chosen species.

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Advances in aquaculture hatchery technology

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However, advances in hatchery technology are often incremental, driven by technical managers of hatcheries and are poorly captured in the primary scientific literature. These advances are not well shared because of real or perceived concerns about losing commercial advantage, but this tends to slow industry development and will reduce the chance of meeting global targets for production. This book reviews current and emerging technologies in key areas of aquaculture hatchery technology. It is hoped that this book will present a convenient, comprehensive and systematic review of recent advances in hatchery technology that will be of interest to hatchery operators, scientists and educators.

In large hatcheries, there may be a vast amount of energy that has to be transferred to the water. In this case, heat pumps, including heat exchangers, are normally used (Fig. 5). Heat pumps need a low temperature source where the energy is ‘removed’ and compressor energy is added and finally Fig. 4 Heat exchangers for heating of water. © Woodhead Publishing Limited, 2013 14 Advances in aquaculture hatchery technology Fig. 5 Heat pumps (3) for heating of water to a hatchery. translated into a small amount of high temperature energy.

Regulation of pH in the water can be done with different chemicals, some of which simply increase pH, while others actively increase alkalinity. If the alkalinity is increased, the water will have some buffering capacity against later drops in pH. A typical chemical of the first group is lye, while CaCO3 is a chemical included in the second group. Moreover, if there are problems with metal ions, a chemical such as silica lye can be used as treatment. Before choosing which pH regulating agent to use, it is therefore crucial to check if the problem is rooted solely in the pH, or if it extends to problems with the metal.

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