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Risk of excessive crowding of fish fry

Review: Abdel Rahman El Gamal (Founder of the website)

The inserted picture shows an excessive crowding of tilapia fry. The crowding condition is not unique and is commonly witnessed in hatcheries and done for easy scooping and bagging. It is commonly believed that because of the short crowding period, no harm to handled fish is expected. However, this assumption cannot be true in all situations. Let us agree that scooping would require a level of crowding but this should consider some precautions. Local oxygenation will be helpful to avoid the drop of oxygen within such crowded fish mass. Another scenario is portioning the total number of the hapa into batches and hence the crowding of a batch enables the scooping in much shorter time with less handling harm.

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Permanent link to this article: http://fishconsult.org/?p=15160

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