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Variations in the photoperiodic cloacal response of Japanese quail: association with testes weight and feather color.
Gen Comp Endocrinol. 1983 Apr; 50(1):1-10.GC

Abstract

The size of the cloacal gland was found to be a reliable indicator of testicular activity of Japanese quail. Six experiments were performed to examine the effects of alternating long and short photoperiod on the size of the cloacal gland of male Japanese quail. Three types of photoperiodic cloacal responses were distinguished. Type I birds became refractory to short photoperiods after they had experienced 5 weeks or more of short days. They maintained large cloacal glands under subsequent condition of alternating long and short photoperiod. Type II birds were intermediate types I and III birds did not become refractory to short photoperiods after experiencing 5 weeks or more of short days. The cloacal glands responded to conditions of alternating long and short photoperiods with increases or decreases in size. Feather color on the throat was found to correspond to the type of cloacal response. Type I birds had brick-red throat feathers. Type II birds had white feathers intermingled with brick-red feathers. Type III had white throat feathers. The percentages of types I, II, and III observed in the experimental population was 67, 18, and 15%, respectively. Type III birds were used to study the effects of blinding on the cloacal response to short photoperiod. Five out of eight blinded type III birds did not lose the responsiveness to short photoperiod. These results are consistent with the view that extraocular photoreceptors participate in the photoperiodic gonadal response of Japanese quail.

Authors

No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

6852518

Citation

Oishi, T, and T Konishi. "Variations in the Photoperiodic Cloacal Response of Japanese Quail: Association With Testes Weight and Feather Color." General and Comparative Endocrinology, vol. 50, no. 1, 1983, pp. 1-10.
Oishi T, Konishi T. Variations in the photoperiodic cloacal response of Japanese quail: association with testes weight and feather color. Gen Comp Endocrinol. 1983;50(1):1-10.
Oishi, T., & Konishi, T. (1983). Variations in the photoperiodic cloacal response of Japanese quail: association with testes weight and feather color. General and Comparative Endocrinology, 50(1), 1-10.
Oishi T, Konishi T. Variations in the Photoperiodic Cloacal Response of Japanese Quail: Association With Testes Weight and Feather Color. Gen Comp Endocrinol. 1983;50(1):1-10. PubMed PMID: 6852518.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Variations in the photoperiodic cloacal response of Japanese quail: association with testes weight and feather color. AU - Oishi,T, AU - Konishi,T, PY - 1983/4/1/pubmed PY - 1983/4/1/medline PY - 1983/4/1/entrez SP - 1 EP - 10 JF - General and comparative endocrinology JO - Gen Comp Endocrinol VL - 50 IS - 1 N2 - The size of the cloacal gland was found to be a reliable indicator of testicular activity of Japanese quail. Six experiments were performed to examine the effects of alternating long and short photoperiod on the size of the cloacal gland of male Japanese quail. Three types of photoperiodic cloacal responses were distinguished. Type I birds became refractory to short photoperiods after they had experienced 5 weeks or more of short days. They maintained large cloacal glands under subsequent condition of alternating long and short photoperiod. Type II birds were intermediate types I and III birds did not become refractory to short photoperiods after experiencing 5 weeks or more of short days. The cloacal glands responded to conditions of alternating long and short photoperiods with increases or decreases in size. Feather color on the throat was found to correspond to the type of cloacal response. Type I birds had brick-red throat feathers. Type II birds had white feathers intermingled with brick-red feathers. Type III had white throat feathers. The percentages of types I, II, and III observed in the experimental population was 67, 18, and 15%, respectively. Type III birds were used to study the effects of blinding on the cloacal response to short photoperiod. Five out of eight blinded type III birds did not lose the responsiveness to short photoperiod. These results are consistent with the view that extraocular photoreceptors participate in the photoperiodic gonadal response of Japanese quail. SN - 0016-6480 UR - https://www.unboundmedicine.com/medline/citation/6852518/Variations_in_the_photoperiodic_cloacal_response_of_Japanese_quail:_association_with_testes_weight_and_feather_color_ L2 - https://linkinghub.elsevier.com/retrieve/pii/0016-6480(83)90236-8 DB - PRIME DP - Unbound Medicine ER -