Volume 10 Issue 2 - April 2018

  • 1. Growth and reproductive response in mango platy (xiphophorus maculatus) to photoperiodic manipulation; effects on growth, gonadal development and fry production

    Authors : Bela Zutshi, Aradhana Singh, Rekha M

    Pages : 260-266

    DOI : http://dx.doi.org/10.21172/1.102.41

    Keywords : Mango platy Xiphophorus maculatus Somatic growth Gonadosomatic index (GSI) Fry production, Photoperiod.

    Abstract :

    Photoperiod is one of the important environmental factors controlling different stages of fish growth to maturation. The present work was studied to evaluate the influence of photoperiod on somatic growth, gonadal development of male and female fish and reproductive performance related to fry production in ornamental exotic fish, mango platy (Xiphophorus maculatus). After acclimatization for a week in lab condition the fish groups were exposed to long (18L: 6D) and short (10L: 14D) photoperiod for a period of 60 days and control fish group were kept in natural environmental laboratory condition. Throughout the study light intensity was kept constant at 1500 lx, dissolved oxygen (DO) ranged from 4.5 to 6.5mg/l, free ammonia varied between 0.72 to 0.78mg/l and pH was 7.0 to 7.5. Fish were fed with formulated diet twice a day (9.00hrs - 16.00hrs). Growth was analyzed in terms of weight gain, specific growth rate (SGR), feed conversion ratio (FCR) and condition factor (CF). Weight gain (1.24±0.076), FCR (54.03 ± 0.29), SGR (0.81±0.033) and GSI of female fishes (24.6±0.66) was higher in fish group exposed to long day photoperiod (18L:6D) when compared to those of short day photoperiod and control. Maximum number of yolky eggs and embryos were observed in the ovaries of female fish group exposed to long photoperiod. In view of the above, result of the present study suggests that long day photoperiod along with formulated feed may be recommended for healthy somatic growth and early fry production in X. maculatus without causing mortality and stress.

    Citing this Journal Article :

    Bela Zutshi, Aradhana Singh, Rekha M, "Growth and reproductive response in mango platy (xiphophorus maculatus) to photoperiodic manipulation; effects on growth, gonadal development and fry production", https://www.ijltet.org/journal_details.php?id=930&j_id=4501, Volume 10 Issue 2 - April 2018, 260-266, #ijltetorg