Content uploaded by Tek Bahadur Gurung
Author content
All content in this area was uploaded by Tek Bahadur Gurung
Content may be subject to copyright.
A preview of the PDF is not available
Introduction of rainbow trout
Abstract
This mini article gives account on introduction and present status of rainbow trout research and works in Nepal. Trout breeding has been successful. In early days when no ready made pellet was available. The trout fingerlings were reared on liver cakes. The pellet preparation was a difficult process, especially that fry and fingerlings. These problems along with several diseases has been overcome. Some of the description about the rainbow trout farming has been described.
ResearchGate has not been able to resolve any citations for this publication.
Introductions of aquatic organisms into Japan are controlled only on the basis of the Convention on International Trade in Endangered Species (CITES) of Wild Fauna and Flora and the quarantine acts. Up to 1986 more than 120 exotic species have been introduced, of which only 36 were made prior to 1945. Introductions are classified into four basic categories. In this paper of those in two categories, (i) species which have spread widely over Japan and are self reproducing, and (ii) those which have been maintained for generations through artificial propagation or in confined natural waters are dealt with.
Reproductive variables of 986 female rainbow trout (Oncorhynchus mykiss) spawned during 1990 in a hatchery in central Chile were evaluated. Data were recorded on individual females. Fish were spawned over a 9-month period, from March to November. The data indicated the coexistence of different strains of fish with different spawning times. There was a direct relationship between body weight and total fecundity (r = 0.71; P < 0.001, n = 905). The correlation between body weight and egg diameter was low (r = 0.16; P < 0.001; N = 890). The correlation between body weight and relative fecundity was not only low, but slightly negative (r = -0.14; P < 0.001; N = 906). There was a high correlation between fertilization rate and survival of the embryo to the eyed stage (r = 0.75; P < 0.001; N = 903). Embryo survival to the eyed stage appeared to be closely related to incubation temperature, with highest yields obtained during months that average water temperature was 8°C or lower. Egg diameter was not positively correlated with survival to the eyed stage.
Exotics-a global perspective with special reference to finfish introductions to Asia In: Exotic Aquatic Organisms Edited by de Silva SS Proceedings of a Workshop on Introduction of Exotic Aquatic Organisms in Shrestha Cold water fish culture potentialities (in Nepali) In: Krishi (bimonthly magazine
- De Silva
De Silva, S. S. (1989) Exotics-a global perspective with special reference to finfish introductions to Asia. In: Exotic Aquatic Organisms. Edited by de Silva SS. Proceedings of a Workshop on Introduction of Exotic Aquatic Organisms in Shrestha, B. C. (1997) Cold water fish culture potentialities (in Nepali). In: Krishi (bimonthly magazine) 34:5 (2054) Push-Magh, Fish Culture Special. HMG, Department of Agriculture, Nepal
Commercial culture of freshwater salmonids, genera Salmo, Thymallus, and Hucho. In: The farming and husbandry of freshwater and marine organisms
- J H Bardach
- W O Ryther
- Mc Larney
Bardach, J. H., W. O. Ryther and Mc Larney (1972)
Commercial culture of freshwater salmonids, genera
Salmo, Thymallus, and Hucho. In: The farming and
husbandry of freshwater and marine organisms. John
Willey and Sons. pp. 397-449.
Rivers of Nepal. A preliminary introduction. A glimpse of water resource development in Nepal
- H M Shrestha
Shrestha, H. M. (1983) Rivers of Nepal. A preliminary
introduction. A glimpse of water resource
development in Nepal. Nepal Digest.
Breeding and cultivation of salmonids or fish culture in cold water In: Textbook of fish culture, breeding and cultivation of fish. Fishing news books ltd
- M Huet
Huet, M. (1975) Breeding and cultivation of salmonids
or fish culture in cold water. In: Textbook of fish
culture, breeding and cultivation of fish. Fishing
news books ltd. 23 Rosemount Avenue, West Byfleet,
Surray, England. pp. 59-112.
Agriculture and fisheries development In: Background Papers. National Conservation Strategy Implementation Program. National Planning Commission, HMG, Nepal, in collaboration with the World Conservation Union (IUCN)
- P P Gorkhali
- J C Gautam
Gorkhali, P. P and J. C. Gautam (1991) Agriculture and
fisheries development. In: Background Papers.
National Conservation Strategy Implementation
Program. National Planning Commission, HMG,
Nepal, in collaboration with the World
Conservation Union (IUCN). Edited by Baker S et
al. 1:211-238.
Impact of exotic aquatic species in Indian waters
- H P C Shetty
- M C Nandeesha
- A G Jhingaran
Shetty, H. P. C., M. C. Nandeesha and A. G. Jhingaran
(1989) Impact of exotic aquatic species in Indian
waters. In: Exotic Aquatic Organisms. Edited by de
Silva SS. Proceedings of a Workshop on Introduction
of Exotic Aquatic Organisms in Asia. Asian
Fisheries Society, Special Publication No. 3. pp. 45-
55.
Address of Dr Chua Thia-Eng, President of the Asian Fisheries Society In: Exotic Aquatic Organisms
- C Thia-Eng
Thia-Eng, C. (1989) Address of Dr. Chua Thia-Eng,
President of the Asian Fisheries Society. In: Exotic
Aquatic Organisms. Edited by de Silva, S. S.
Proceedings of a Workshop on Introduction of
Exotic Aquatic Organisms in Asia. Asian Fisheries
Society, Special Publication No. 3. pp. vii-viii.