Tags

Type your tag names separated by a space and hit enter

Cloacal gland, endocrine testicular, and adrenocortical photoresponsiveness in male Japanese quail exposed to short days.
Domest Anim Endocrinol. 2013 Apr; 44(3):151-6.DA

Abstract

Photoperiod is the most important "noise-free" seasonal environmental cue for synchronizing physiological states (such as reproductive activity) in birds. However, in photoperiodic birds such as Japanese quail, the effect of photoperiod on adrenocortical activity remains unclear, particularly in males with differences in cloacal gland photoresponsiveness. At 8 wk of age, birds (n = 55) were either assigned to a short photoperiod (8L:16D; SD) or maintained under long photoperiod (16L:8D; LD; control). After 5 wk of SD exposure, males were classified as nonresponsive (SD-NR; with foam production) or responsive (SD-R; with no foam production) to short days, depending on the cloacal gland volume was above or below 1,000 mm(3). At 14 wk of age, droppings were collected during 3 consecutive days to determine corticosterone (CMs) and androgen metabolites (AMs) by enzyme immunoassays. Male Japanese quail under LD showed significantly higher concentrations of CMs (300 ± 10 ng/g) and AMs (1,257 ± 115 ng/g) than birds kept under SD. Under short days, SD-NR and SD-R showed differences (P < 0.0001), both in CM (153 ± 8 ng/g and 98 ± 6 ng/g, respectively) and AM concentrations (1,294 ± 309 ng/g and 275 ± 53 ng/g, respectively). Interestingly, although SD-NR males exhibited no cloacal gland arrest (according to cloacal gland volume and foam production) and similar testicular activity (AM values) to LD males, they showed lower concentrations of CMs compared with males that remained on LD (P < 0.05). Our findings suggest length of photoperiod affected hypothalamic-pituitary-adrenal activity; however, that was not the only factor involved, because birds subjected to shorter days but whose hypothalamic-pituitary-gonadal axis failed to respond had intermediate CM values. Further research is required to elucidate the underlying mechanisms of this interesting finding.

Authors+Show Affiliations

Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Av. Velez Sarsfield 1611 (X5016GCA) Cordoba, Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN), Universidad Nacional de Córdoba (UNC) and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. jmbusso@conicet.gov.arNo 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

23411012

Citation

Busso, J M., et al. "Cloacal Gland, Endocrine Testicular, and Adrenocortical Photoresponsiveness in Male Japanese Quail Exposed to Short Days." Domestic Animal Endocrinology, vol. 44, no. 3, 2013, pp. 151-6.
Busso JM, Dominchin MF, Marin RH, et al. Cloacal gland, endocrine testicular, and adrenocortical photoresponsiveness in male Japanese quail exposed to short days. Domest Anim Endocrinol. 2013;44(3):151-6.
Busso, J. M., Dominchin, M. F., Marin, R. H., & Palme, R. (2013). Cloacal gland, endocrine testicular, and adrenocortical photoresponsiveness in male Japanese quail exposed to short days. Domestic Animal Endocrinology, 44(3), 151-6. https://doi.org/10.1016/j.domaniend.2013.01.001
Busso JM, et al. Cloacal Gland, Endocrine Testicular, and Adrenocortical Photoresponsiveness in Male Japanese Quail Exposed to Short Days. Domest Anim Endocrinol. 2013;44(3):151-6. PubMed PMID: 23411012.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cloacal gland, endocrine testicular, and adrenocortical photoresponsiveness in male Japanese quail exposed to short days. AU - Busso,J M, AU - Dominchin,M F, AU - Marin,R H, AU - Palme,R, Y1 - 2013/01/24/ PY - 2012/10/16/received PY - 2012/12/21/revised PY - 2013/01/01/accepted PY - 2013/2/16/entrez PY - 2013/2/16/pubmed PY - 2013/9/4/medline SP - 151 EP - 6 JF - Domestic animal endocrinology JO - Domest Anim Endocrinol VL - 44 IS - 3 N2 - Photoperiod is the most important "noise-free" seasonal environmental cue for synchronizing physiological states (such as reproductive activity) in birds. However, in photoperiodic birds such as Japanese quail, the effect of photoperiod on adrenocortical activity remains unclear, particularly in males with differences in cloacal gland photoresponsiveness. At 8 wk of age, birds (n = 55) were either assigned to a short photoperiod (8L:16D; SD) or maintained under long photoperiod (16L:8D; LD; control). After 5 wk of SD exposure, males were classified as nonresponsive (SD-NR; with foam production) or responsive (SD-R; with no foam production) to short days, depending on the cloacal gland volume was above or below 1,000 mm(3). At 14 wk of age, droppings were collected during 3 consecutive days to determine corticosterone (CMs) and androgen metabolites (AMs) by enzyme immunoassays. Male Japanese quail under LD showed significantly higher concentrations of CMs (300 ± 10 ng/g) and AMs (1,257 ± 115 ng/g) than birds kept under SD. Under short days, SD-NR and SD-R showed differences (P < 0.0001), both in CM (153 ± 8 ng/g and 98 ± 6 ng/g, respectively) and AM concentrations (1,294 ± 309 ng/g and 275 ± 53 ng/g, respectively). Interestingly, although SD-NR males exhibited no cloacal gland arrest (according to cloacal gland volume and foam production) and similar testicular activity (AM values) to LD males, they showed lower concentrations of CMs compared with males that remained on LD (P < 0.05). Our findings suggest length of photoperiod affected hypothalamic-pituitary-adrenal activity; however, that was not the only factor involved, because birds subjected to shorter days but whose hypothalamic-pituitary-gonadal axis failed to respond had intermediate CM values. Further research is required to elucidate the underlying mechanisms of this interesting finding. SN - 1879-0054 UR - https://www.unboundmedicine.com/medline/citation/23411012/Cloacal_gland_endocrine_testicular_and_adrenocortical_photoresponsiveness_in_male_Japanese_quail_exposed_to_short_days_ DB - PRIME DP - Unbound Medicine ER -