Kumar V
Acta Physiol Hung. 1986;67(2):193-8.
A study was made of the carry-over effect of long photoperiods followed by short photoperiods ou the fattening and gonadal response in a photoperiodic migratory species, the Blackheaded Bunting (Emberiza melanocephala). The effect was studied in photosensitive and then in photostimulated birds. Two experiments were performed: experiment I with photosensitive males and experiment II with photosensitive males exposed to 30 long photoperiods. In both of them, five groups were submitted to the following treatments for 30 days: Group S, a short daily photoperiod; Group L, a long daily photoperiod; Group LS, alternating long and short daily photoperiods; Group L 2S, one long with two short daily photoperiods; Group L 3S, one long with three short daily photoperiods. The results showed that the inductive effect of long days or the inhibitory effect of short days was affected by intervening reversed daylengths.
对一种光周期迁徙物种黑头鹀（Emberiza melanocephala）进行了一项研究，观察长光周期后接短光周期对其育肥和性腺反应的残留效应。该效应在光敏鸟以及随后的光刺激鸟中进行了研究。进行了两项实验：实验I使用光敏雄性鸟，实验II使用暴露于30个长光周期的光敏雄性鸟。在这两项实验中，五组鸟接受以下处理30天：S组，每日短光周期；L组，每日长光周期；LS组，长、短光周期交替；L 2S组，一个长光周期和两个短光周期交替；L 3S组，一个长光周期和三个短光周期交替。结果表明，长日照的诱导效应或短日照的抑制效应会受到中间反向日长的影响。
