Age Influenced Variations in Plasma Cholesterol, Testicular Cholesterol and Testicular Ascorbic Acid of Prepubertal Turkeys (Meleagris gallopavo)
| Autor: | D. Chand, G. C. Georgie, D. V. Arneja |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1981 |
| Předmět: |
medicine.medical_specialty
endocrine system Testicular tissue lcsh:Veterinary medicine endocrine system diseases General Veterinary urogenital system Cholesterol Testicular mass Biology urologic and male genital diseases Ascorbic acid biology.organism_classification chemistry.chemical_compound Endocrinology chemistry Plasma cholesterol Internal medicine Mole Blood plasma medicine lcsh:SF600-1100 Meleagris gallopavo |
| Zdroj: | Acta Veterinaria Brno, Vol 50, Iss 1, Pp 53-59 (1981) |
| ISSN: | 1801-7576 0001-7213 |
| Popis: | Arneja D. V., D. Chand, G. C. Georgie: Age influenced Variations in Plasma Cholesterol, Testicular Cholesterol and Testicular Ascorbic Acid of Prepubertal Turkeys (Meleagris gallopavo). Acta vet. Bmo, 50, 1981: 53-59. The blood plasma and testicular cholesterol and testicular ascorbic acid concen trations were determined in prepubertal male turkeys at different periods between 135 and 235 days of age and were related to testicular maturation. Plasma cholesterol concentration was negatively correlated with testicular weight (r = -0.48, P < 0.01) and showed a decline with age from 8.12 to 3.84 mmol.l-1 during the period. A sta tistically non-significant decline in testicular cholesterol concentration (101.27 to 40.36 ",mol/g wet weight) Was observed. The testicular ascorbic acid concen tration showed a significant (P < 0.01) fall, from 97.7 to 18.5,tmol/g wet weight, between 145 and 175 days of age. During the study period, testicular weight steadily increased from 0.663 to 21.326 g and showed a size asymmetry with the left testicle being almost double in weight than the right. Maturation, testicular mass. The relationship of cholesterol concentrations of testicular tissue to maturation and steroidoge nesis (Massa and Aoki 1976; Ikegwuonu and Aire 1977; Chand et. a!. 1978) as well as sper matogenesis (Kanwar et al. 1977) in that tissue have been studied in birds. Attempt has also been made to study the testicular ascorbic acid depletion in phases of increased steroidogenic activity during testicular growth in cockerels (Chand et a!. 1978) because of the key role this phenomenon plays in steroidogenesis (Kitabachi 1967). Though changes in testicular weights at different ages have -been reported for turkeys (Zidkih 1962; Burke 1973), the authors have not come across reports where estimates of testicular cholesterol or ascorbic acid concentrations have been made and related these to testicular maturation in this species. This paper presents the results of the investigation carried out to establish the age influenced changes in testicular cholesterol and ascorbic acid concentration to testicular growth in turkeys (Meleagris gallopavo), and to enquire into the possibility of existence of a relationship between the levels of these tissue constituents to testicular maturation. Simultaneously, estimates of testicular lipid concentrations were also made and the changes in testicular cholesterol concentrations were related to the total lipid chilnges of testes. The circulating plasma cholesterol concentration has been correlated to the changes in testicular weight and its cholesterol content, as there are conflicting reports that plasma cholesterol levels are influenced by gonadal activity in birds (Hoffman 1960; Anisko 1974). |
| Databáze: | OpenAIRE |
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