Effects of photoperiod and temperature on testicular and thyroid activity of the Japanese quail

Oishi, Tadashi; Konishi, Toru

doi:10.1016/0016-6480(78)90031-x

Cited by 38 publications

(18 citation statements)

References 22 publications

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“…Table 3. Timing of significant changes in variables measured in male Japanese quail transferred from short days at 10 C to long days at 20 C; and in male quail transferred from long days at 20 C to short days at 10 C. Konishi, 1978;Wada et al, 1990). In contrast, sexually mature male Japanese quail transferred to and maintained on short daylengths and low temperatures maintained normal adult body weights whilst rapid changes in plasma gonadotrophins and T preceded changes in CGA and testicular regression (Wada et al, 1990;Tsuyoshi and Wada, 1992;Wada, 1993;Kobayashi et al, 2004).…”

Section: Discussionmentioning

confidence: 75%

Changes in plasma gonadotrophins, testosterone, prolactin, thyroxine and triiodothyronine concentrations in male Japanese quail (Coturnix coturnix japonica) of a heavy body weight line during photo-induced testicular growth and regression

Henare¹,

Kikuchi²,

Talbot³

et al. 2011

British Poultry Science

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1. Simultaneous changes of cloacal gland area (CGA) and plasma luteinising hormone (LH), follicle stimulating hormone (FSH), testosterone (T), prolactin (PRL), thyroxine (T(4)) and triiodothyronine (T(3)) during photo-induced testicular growth and regression were measured in commercially bred Japanese quail from a heavy body weight line. 2. Somatically mature male Japanese quail were transferred from short days (light:dark 8L:16D) at 10°C, to long days (16L:8D) at 20°C; and sexually mature male Japanese quail were transferred from long to short days. All variables were measured at transfer and every 5 d thereafter for 35 d. 3. Transfer from short to long days caused significant increases in LH, FSH, T and testis weight (TW) after 5 d, and in CGA after 10 d. T(3) decreased after 5 d, whereas T(4) increased significantly after 25 long days and PRL did not undergo any consistent change. The testicular growth rate was k = 0·1146. 4. Transferring quail from long to short days caused significant decreases in LH and FSH after 5 d, and decreases in T, TW and CGA after 10 d. T(4) decreased after 5 d whilst T(3) increased significantly by day 15. PRL decreased significantly after 10 d then rose before declining again. The testicular regression rate was k = 0·0582. 5. The rates of photo-induced testicular development and regression in a strain of large Japanese quail did not differ from rates reported for other strains of quail. CGA was a better indicator of TW than plasma T concentrations during growth and regression. The role of PRL in photo-induced reproductive cycles in male Japanese quail remains to be determined. 6. The photoperiod-induced changes in gonad size and hormone concentrations, together provide valuable information that can be used in future studies of the endocrinology and neuroendocrinology of photoperiodism in birds.

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Section: Discussionmentioning

confidence: 75%

Changes in plasma gonadotrophins, testosterone, prolactin, thyroxine and triiodothyronine concentrations in male Japanese quail (Coturnix coturnix japonica) of a heavy body weight line during photo-induced testicular growth and regression

Henare¹,

Kikuchi²,

Talbot³

et al. 2011

British Poultry Science

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“…The result, therefore, demonstrated that lean body mass only was not critical for the initiation of sexual maturity, which conflicts with the finding (Zelenka et al, 1984) that late-maturing female quail entered lay when a critical lean body mass was reached. The quail in this treatment would have attained sexual maturity if the experimental period was prolonged, for quail subjected Downloaded by [McGill University Library] at 15:05 14 December 2014 to such an IP attained sexual maturity from 84 d of age (Oishi and Konishi, 1978).…”

Section: Means For Body Weight Ovary-oviduct Weight Shank Length Amentioning

confidence: 99%

Roles of age, body weight and composition in the initiation of sexual maturation of Japanese quail (coturnix coturnix japonica)

Oruwari

Brody

1988

British Poultry Science

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1. The roles of chronological age, body weight and body composition in the initiation of sexual maturation of Japanese quail (Coturnix coturnix japonica) were investigated by imposing an inhibitory photoperiod (IP), and by the intramuscular injection of turkey growth hormone (GH) or antisera to turkey growth hormone (AGH). 2. Absence of sexual maturity in the IP treatment was accompanied by reduced testis and ovary-oviduct weights, and an increased breast muscle weight expressed as a proportion of body weight. 3. Antisera to turkey growth hormone (AGH) did not completely inhibit the metabolic activities of endogenous GH. 4. The roles of chronological age, body weight and body composition in the initiation of sexual maturity were inseparable.

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“…There is now considerable interest in how these various endocrine changes within the animal are integrated to bring about periods of fertility and infertility. Many studies in birds have focussed on the interaction between the thyroid and gonads, since the function of these organs shows a profound reciprocal relationship which is apparently related to the photoperiod (Thapliyal, 1969;Assenmacher, 1973;Oishi & Konishi, 1978;Péczely, Pethes & Rudas, 1980). Follett & Farner (1966) have shown that long daily photoperiods stimulate gonadal activity in the Japanese quail (Coturnix coturnix japónica).…”

Section: Introductionmentioning

confidence: 99%

Hypothalamic Secretion of Thyrotrophin Releasing Hormone Is Decreased in Male Japanese Quail Exposed to Long Daily Photoperiods

Almeida¹

1982

Journal of Endocrinology

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Adult male Japanese quail held under short daily photoperiods (8 h light: 16 h darkness; 8L: 16D) had significantly higher plasma concentrations of thyroid-stimulating hormone (TSH), tri-iodothyronine (T3) and thyroxine (T4) than did those kept under long days (16L:8D). When given a single s.c. injection of 50 microgram thyrotrophin releasing hormone (TRH) the birds held under both the 8L: 16D and 16L: 8D photoperiods showed rapid increases in their blood concentrations of TSH, T4 and T3, the amplitude of the TSH response of the birds exposed to 16L: 8D being particularly marked. These results suggest that, in the male quail, long daily photoperiods produce a hypothyroid state as a result of diminished TRH secretion. The synthetic and secretory capacities of the thyroid gland and pituitary thyrotrophs are apparently unimpaired by long days.

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Effects of photoperiod and temperature on testicular and thyroid activity of the Japanese quail

Cited by 38 publications

References 22 publications

Changes in plasma gonadotrophins, testosterone, prolactin, thyroxine and triiodothyronine concentrations in male Japanese quail (Coturnix coturnix japonica) of a heavy body weight line during photo-induced testicular growth and regression

Changes in plasma gonadotrophins, testosterone, prolactin, thyroxine and triiodothyronine concentrations in male Japanese quail (Coturnix coturnix japonica) of a heavy body weight line during photo-induced testicular growth and regression

Roles of age, body weight and composition in the initiation of sexual maturation of Japanese quail (coturnix coturnix japonica)

Hypothalamic Secretion of Thyrotrophin Releasing Hormone Is Decreased in Male Japanese Quail Exposed to Long Daily Photoperiods

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