The introduction of fish into rice fields increases the yield of rice and gives additional income from the fish harvested. Experiences in Indonesia and East Bengal are described which illustrate this. Suitable fish for the purpose are Tilapia sp., carp (Labeo rohita, Catla catla and Cirrhina...

2. Values are given for the Ca content and chlorinity of surface and deep waters. There was no relationship between these values and the hardness of oyster shells, and data for Port Hacking, where stunted growth in oysters occurs, showed no difference in Ca content from areas where growth is normal.

3. A discussion is given of the choice of methods for the analyses of oysters. Oysters can be dried satisfactorily for glycogen and protein analysis by heating for 3 to 4 hours at 90° to 100° C. in vacuo. From results obtained it is concluded that glycogen is stored as a food reserve and drawn upon ...

A large issue of this journal is devoted to fish. Papers of most direct interest include: AHMAD, N. (271-275), inland fish and fishery of Pakistan; CHAKRABORTI, S. K. (281-297), fertilization of fish ponds; NOORUDDIN (427-443), the food of oysters of Karachi coast; AHMAD, N. (447-452), Tilapia...

In Rungwe District, Tanzania, in a mountainous area at about 1500 m the main tribe was the WaNyakyusa, mostly peasant cultivators, the soil was fertile and the main cash crop was coffee. Population was healthy with some signs of early malnutrition but seldom kwashiorkor. The six 10-house groups...

Fishponds in Hong Kong are principally around Deep Bay in an area of recent estuarine sedimentation associated with the discharge from the Pearl River. The sediments contain large amounts of sulfide, which, on exposure to air, forms sulfuric acid leading to a low pH and to high concentrations of...

Nile tilapia (Tilapia aurea), bluegill (Lepomis macrochirus) and carp (Cyprinus carpio) were studied in earth or in plastic ponds. Some ponds were fertilized and some had rough pine boards, alder brushwood or sheets of clear polyethylene immersed in them to provide extra surface for attachment of...

The All-Union Institute of Fishpond Culture has made about 80 practical trials with 30 types of food. Carp were found to eat without harm oilcakes unsuitable for feeding livestock, such as cottonseed cake with its alkaloid, rapeseed cake which would damage the kidneys of mammals, castor and...

Fish from 1 to 9 in. long were netted from streams, rivers and canals in Pakistan and the different classes of food organisms found in the gut are tabulated for each of 27 species of fish. The 10 herbivores were Amblypharyngodon mola, Cyprinion watsoni, Cyprinion irregulare, Garra gotyla, Garra...