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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.
Br Poult Sci. 2011 Dec; 52(6):782-91.BP

Abstract

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.

Authors+Show Affiliations

Riddet Institute, Massey University, Private Bag 11-222, Palmerston North, New Zealand.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22221245

Citation

Henare, S J., et al. "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." British Poultry Science, vol. 52, no. 6, 2011, pp. 782-91.
Henare SJ, Kikuchi M, Talbot RT, et al. 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. Br Poult Sci. 2011;52(6):782-91.
Henare, S. J., Kikuchi, M., Talbot, R. T., & Cockrem, J. F. (2011). 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. British Poultry Science, 52(6), 782-91. https://doi.org/10.1080/00071668.2011.639341
Henare SJ, et al. 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. Br Poult Sci. 2011;52(6):782-91. PubMed PMID: 22221245.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - 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. AU - Henare,S J, AU - Kikuchi,M, AU - Talbot,R T, AU - Cockrem,J F, PY - 2012/1/7/entrez PY - 2012/1/10/pubmed PY - 2012/5/24/medline SP - 782 EP - 91 JF - British poultry science JO - Br. Poult. Sci. VL - 52 IS - 6 N2 - 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. SN - 1466-1799 UR - https://www.unboundmedicine.com/medline/citation/22221245/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_ L2 - http://www.tandfonline.com/doi/full/10.1080/00071668.2011.639341 DB - PRIME DP - Unbound Medicine ER -