Effect of Lunar Synchronization on the Reproduction Time of Discus Fish (Symphysodon sp.) Under Controlled Aquarium Conditions

ÇELİK P., ÇELİK I.

JOURNAL OF ANIMAL AND VETERINARY ADVANCES, vol.10, no.7, pp.890-893, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 10 Issue: 7
  • Publication Date: 2011
  • Doi Number: 10.3923/javaa.2011.890.893
  • Journal Name: JOURNAL OF ANIMAL AND VETERINARY ADVANCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.890-893
  • Keywords: Discus, symphysodon, lunar synchronization, spawning, breeding, Turkey
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

The reproduction times of the discus fish were observed for 2 years under fully-controlled production conditions. The position of the moon was also recorded on the spawning day of the fish at a light photoperiod of 14 h and a dark photoperiod of 10 h with water quality parameters of 27-30 degrees C, pH 4.5-6.5 and conductivity of 80-200 mu S. Of 102 observed reproductions, 28 occurred at the first quarter of the moon, 28 at full moon, 40 at the last quarter and 6 at new moon. Accordingly, it has been concluded that the discus fish display a reproduction behavior according to the lunar cycle even indoors, although they do not receive direct moonlight.