The official journal of The Sri Lanka Veterinary Association
Sri Lanka Veterinary Journal (volume: 48(2))
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Volume - 48(2)
Year - 2001
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Section - A
Review Article
A.S. Abeyratne1
1. Faculty of Veterinary Medicine & Animal Science, University of Peradeniya, Peradeniya

Abstract is not available for this review article. Please click on Read button to read  online or Download button to download the PDF of this review article.

Short Communication
B.A.D.S. Jayawardana1
1. Department of Wildlife Conservation, Gregory\'s Road, Colombo 7

FEEDING PROBLEMS IN HAND-FED SRI LANKAN ELEPHANT CALVES AT THE ELEPHANT TRANSIT HOME AT UDAWALAWE

B.A.D.S. Jayawardana, B.V.Sc

Department of Wildlife Conservation, Gregory’s Road, Colombo 7

The main digestive problems encountered at the Elephant Transit Home (ETH) at Udawalawe, in neonatal and infant age groups, were fat indigestion & intolerance and lactose intolerance.  Some cases of death still remain unidentified.  The major component of milk feeding regime consisted or human infant formula.  The feed ingredients used in the trials included skimmilk, rice porridge, sugar cane jaggery (sugar cane extract) and soya-based milk powder.  The data obtained from the trials are not sufficient to develop a definite formula to overcome the feeding problems.  But the reduction in the mortality indicates that suitable artificial formula could be developed by a trial and error method.

S.L.Vet.J. 2001, 48(2A): 5-6

U.L.D. Jayantha1,  Ashoka Dangolla1  and  Indira Silva1
1. Faculty of Veterinary Medicine & Animal Science, University of Peradeniya, Peradeniya

ORNAMENTAL FISH REARING IN SRI LANKA: SOME ASPECTS OF BREEDING OF THE WILD AND NEON STRAINS OF GUPPY (POECILLIA RETICULATA)

U.L.D. Jayantha, B.V.Sc., Ashoka Dangolla, B.V.Sc., Ph.D and Indira Silva B.V.Sc., Ph.D

Faculty of Veterinary Medicine and Animal Science,

University of Peradeniya, Peradeniya

Thirty neon guppy (Poecilia reticulate) from an aquarium in Kalutara, and thirty wild guppy collected from a drain were reared in two separate tanks.  Their F2 offspring fry were reared in separate tanks from birth (Day 1).  The respective males and females of each strain were reared separately after sexing on Day 21. On Day 60, three pairs of males and females from each strain, were reared separately in six different tanks (3 wild and 3 neon pairs). Males were allowed in these tanks for only seven days.  The females in the six tanks were monitored for 3 successive pregnancies.  The age at maturity of male fish was measured by the development of gonopodium.  The respective F3 offsprings were removed from the tanks when fry were one day old.  In addition, the length of pregnancy in females, the fry size and the male:female ratio in F3 offsprings were also monitored in the two strains.

It was evident that the semen get stored within the female guppy giving rise to successive pregnancies.  The males of the wild strain sexually matured much earlier (between 21-35 days) compared to the males of the neon strain (28-50 days).  The overall mean pregnancy period was shorter in the wild strain (21 days) compared to 30 days in the neon strain.  These findings may be manifestations of the efforts of the wild strain for efficient propagation in an altered environment (drain).  Females of both strains produced a second and a third offspring without the presence of males.  However, the wild variety produced a lesser number of fry (mean fry size of 31) compared to the neon strain (mean fry size of 37).  The early sexual maturity and the shorter pregnancy period of the wild strains may reflect their relatively faster propagation compared to neon strain, despite the relatively smaller fry size per pregnancy.  The male:female ratio of the first offspring in the wild and ornamental strain were 3:1 and 2:1 respectively.  However the ratio was 1:1 in the third offspring in both strains.  This shows that the initial natural selection process favors males over females.  If a method could be invented to produce more males which are colourful and therefore has more demand, compared to females, income generated from guppy farming could be increased.

 S.L.Vet.J. 2001, 48(2A): 7-9

 

Section - B
News

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Theme Seminar
A.D.N. Chandrasiri1
1. Veterinary Research Institute, Gannoruwa, Peradeniya

Abstract is not available for this item. Please click on Read button to read  online or Download button to download the PDF of the full text of the lecture delivered by Dr. ADN Chandrasiri at the seminar on Large Animal Medicine and Nutrition in 2001.

Thula Wijewardana1
1. Veterinary Research Institute, Gannoruwa

Abstract is not available for this item. Please click on Read button to read  online or Download button to download the PDF of the full text of the lecture delivered by Dr. Thula Wijewardana at the seminar on Large Animal Medicine and Nutrition in 2001.

R. Sivakanesan1
1. Department of Biochemistry, Faculty of Medicine, University of Peradeniya, Peradeniya

Abstract is not available for this item. Please click on Read button to read  online or Download button to download the PDF of the full text of the lecture delivered by Prof. R. Sivakanesan at the seminar on Large Animal Medicine and Nutrition in 2001.

M. Somarathne1
1. Veterinary Research Institute, Gannoruwa

Abstract is not available for this item. Please click on Read button to read  online or Download button to download the PDF of the full text of the lecture delivered by Dr. M. Somarathne at the seminar on Large Animal Medicine and Nutrition in 2001.

Letter to the Editor
M.B. Navaratne1,  A.I. Attanayake1,  S.K. Abeyratne1  and  A.A. Vipulasiri1
1. Veterinary Research Institute, Gannoruwa

Abstract is not available for this item. Please click on Read button to read  online or Download button to download the PDF of this letter to the editor

C. Meemaduma1
1. Retired Zoo Veterinarian, 194, Galle Road, Ratmalana

Abstract is not available for this item. Please click on Read button to read  online or Download button to download the PDF of this letter to the editor.

Reports
Ranjani Hettiarachchi1,  J. K. H. Uberatne1  and  S.N. Kodithuwakku1
1. Department of Animal Production and Health, Getambe, Peradeniya

Abstract is not available for this item. Please click on Read button to read  online or Download button to download the PDF of this report.

Abstracts

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