Biology

Known for its tasty flesh, silver therapon, locally known as ayungin, has been regarded to be one of the most valuable edible native freshwater species in the Philippines. Demands for this fish species remain high which caused the wild stock supply to decline. Due to this growing concern, a hatchery technique was devised by an AQD scientist to aid the deteriorating population of the species in the Philippine waters.

Österreich verfügt über eine grosse Vielfalt an Arten und Lebensräumen. Das vorliegende Buch gibt erstmals einen Überblick über wesentliche Aspekte der Biodiversität in Österreich, die etwa 67 000 Pflanzen- und Tierarten umfasst und beinahe 500 Biotoptypen unterscheidet. Landesweite Darstellungen und Analysen der Moos-, Gefässpflanzen-, Brutvogel- und Biotoptypenvielfalt werden ergänzt durch regionale Untersuchungen zur Diversität der Heuschrecken und Säugetiere.

This manual includes the biology of the crab (Scylla serrata, S. tranquebarica, and S. olivacea), and describes principles and procedures for spawning the mature crabs and rearing the zoea to "fly" size crabs. It focuses on the hatchery rearing of S. serrata as the farming of this species is more economically viable than the two other species. This manual builds upon the 2nd edition of Biology and hatchery of mud crabs Scylla spp. published in 2008.

Freshwater Reviews is a peer-reviewed international journal dedicated to enhancing the understanding of inland waters. The content of review papers is primarily biological but papers covering limnology, policy and socio-economic aspects of fresh waters are acceptable if they are relevant to our understanding or management of fresh water biology.

This text deals mainly with statistical methods appropriate for large samples. Frequency distributions, tabulation, graphing, use of centering constants and measures of variation, and other descriptive methods are treated in the introductory chapters. Further topics include the binomial and the use of normal distribution in large sample approximate tests of significance for differences in sample means and proportions.