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Anabas testudineus (Bloch, 1792) is locally known as koi, familiar to people for its exceptional taste. Although koi is listed by IUCN as data deficient, its abundance in natural water bodies of Bangladesh is reduced at a severe scale in comparison to a decade before. Considering the present biodiversity status of A. testudineus in nature, the author conducted this work for conservation of the genetic resources of the fish through cryopreservation of spermatozoa. The book will explain different steps in sperm cryopreservation protocol chronologically which can be applied further in relevant...

This study was conducted to know the morphological variations between two different strains of Nile Tilapia, Oreochromis niloticus. This aquatic chicken is emerging in a large scale all over the world including Bangladesh. So, farmers need to select the suitable strain which will grow fast and ensure them more profit. This book will chronologically discuss different morphometric and meristic variations between traditional GIFT and recently developed GIFU strains which will help the farmers as well researchers to identify the better one.