ഊര്‍ജ്ജാവശ്യകത കുറഞ്ഞ മത്സ്യബന്ധനരീതികള്‍ (Low energy fishing techniques)

Fishing is hard hit by the rise in fuel prices. This is especially true of trawlers. Because of high fuel consumption of trawlers, there has been considerable development in the use of large diameter propellers and nozzles and large reduction gears to improve efficiency.Consequent on the introduction of mechanised boats and modem fishing methods in the late fifties, fishing attained the status of an industry. The widespread use of outboard motors in the eighties brought in marked changes in the traditional sector. The deplojonent of outboard motors enabled the country crafts to go deeper and farther for fishing

A note on the comparative catch efficiency of nylon over cotton gill nets in reservoir fishing

The authors conducted a series of experiments to evaluate the relative efficiency of nylon over cotton in tropical waters, particularly in reservoir fishing. The experiments were conducted in the Gobindsagar reservoir (Himachal Pradesh/Punjab). The nets made with both materials were identical in essential details like twine size, mesh size, number of floats arid sinkers and hanging coefficients

Productivity and seasonal abundance of commercially important fishes of Gobindsagar Reservoir

Fishing experiments with gill nets were carried out at different centres of Gobindsagar reservoir through the years 1964-70. The seasonal abundance of main species of fishes and their zone of distribution were studied. Labeo diplostoma, Labeo bata, Barbus tor and Mystus seenghala are the main fish species of the reservoir. The abundance of the above species were observed to be the highest towards the Lunkhar arm of the reservoir

Purse-seines off Goa

The design, construction and operational details of the purse-seines operated from Goa, for sardines and mackerel are reported briefly. The deck equipment and details of vessel along with the fishing season, fishing grounds and catches are briefly accounted. The design has been compared with Japanese purse-seines operated for the same species of fishes. Based on the findings an improved design of purse-seine has been presented

One-boat midwater trawling with unequal panelled trawl

Results of the comparative efficiency studies with 10.5 m equal panelled and 10.3 m unequal panelled midwater trawls operated from 10.9 m wooden trawler are presented. Out of the two nets, the latter proved to be relatively good for the capture of off bottom and column fishes like pomfrets, seer, lactarius, catfish, silver bar, ribbon fish and an increase of 84.4% in total catch was observed

On the optimum mesh size for the capture of Barbus tor (Hamilton)

Results of mesh selectivity experiments on B. tor are presented in this paper. Selectivity curve on the basis of maximum girth of fish in relation to perimeter of mesh was worked out. The optimum girth/mesh perimeter ratio was found to be 1.31. A linear regression of G+0.445L=12.8 was fitted for conversion of length to girth

Митолошките елементи во македонската научно-фантастична книжевност за деца и млади

This paper reflects the presence of mythological elements in the Macedonian contemporary science-fiction literature for children and youth. In the first place, there is a cognitive element, care for the collective destiny of the tribe or community, then "technical utilitarism" or means by which the hero uses to facilitate his enterprise, skills that people from Earth concurrence of the aliens (telepathy, levitation, invisibility), then the topic of cyclical destruction and renewal of the Cosmos, aspect of initiation, the fear of the machines, meeting the primitive civilization, the desire to beat the old age and death, and so on

Design and manufacture of helical tissue support for surgical correction of age-related macular degeneration

Issued as final reportEmtech Biotechnology Developmen

Shark long line gear of India

Sharks are mainly harvested with long lines which is less expensive compared to other methods of fishing. Though this is a common gear operated along the coast, the gear in every region has its own peculiarities in construction and rigging. This communication furnishes detailed description of the gear operated in different centres. Suggestions are also offered to improve the gear and methods for enhancing production