Interrelationship of photoperiod and feed utilization on growth and reproductive performance in the Red eyed orange molly (Poecilia sphenops)

Abstract

SummaryThis work is novel to research field since photoperiodic effect on Poecilia sphenops, a livebearer fish under artificial environmental conditions resulted in enhanced growth and reproductive performance with fry production.All rights reserved. No reuse allowed without permission.(which was not peer-reviewed) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.The copyright holder for this preprint . http://dx.doi.org/10.1101/209346 doi: bioRxiv preprint first posted online Oct. 26, 2017; AbstractLight is a major environmental factors that synchronize all life-stages of fish, from body growth to sexual maturation. The objective of this research is to enhance the growth and reproductive performance in the test fish, red eyed orange molly (Poecilia sphenops) exposed to standardized manipulated photoperiod. In present study, growth and gonadal development of the test fish with an average initial weight (0.52g) and an average total length (3.2cm) exposed to two photoperiods (18L:6D and 10L:14D) at constant light intensity (1500 lx) for a period of 60 days was investigated. The fish were fed with formulated feed twice a day as per 10% of body weight. During a long day photoperiod (18L:6D) significant increase in growth parameters such as, weight gain (2.2 ± 0.04), feed conversion ratio (8.9 ± 0.004) and specific growth rate (1.2 ± 0% day -1 ) was observed. Mean gonadosomatic index (GSI) in female (30.4 ± 0.11) and male fish (2.0 ± 0.17) was also significantly higher in long-day photoperiod followed by short day photoperiod (10L:14D). The results confirm that manipulated long-day photoperiod induced somatic growth and enhanced gonadal development in P. sphenops without causing any stress.All rights reserved. No reuse allowed without permission.(which was not peer-reviewed) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.

Effects of photoperiod on growth performance and melanogenesis pathway for skin pigmentation of Malaysian red tilapia

“…In our study, the GSI of red tilapia reared under different photoperiod regimes was not significant different, similar to the results obtained in Nile tilapia by previous authors (Navarro, Sousa, Wlademir, & Bizarro, 2015;Zutshi & Singh, 2017 et al, 2006). The results of photoperiods on GSI of tilapia are still confusing and inconsistency.…”

“…In our study, the GSI of red tilapia reared under different photoperiod regimes was not significant different, similar to the results obtained in Nile tilapia by previous authors (Navarro, Sousa, Wlademir, & Bizarro, ; Zutshi & Singh, ). In contrary, other studies have obtained high GSI and high spawning rate in O. niloticus reared under prolonged light (Campos‐Mendoza & Mcandrew, ; Rad et al, ).…”

“…We suggest more studies in order to provide clear reasons. Furthermore, no significant difference in survival rate was obtained in fish reared under different photoperiods, similar to results obtained by Ali and El‐Feky () and Zutshi and Singh (). Therefore, photoperiod manipulation can be applied in order to improve the growth rate of red tilapia without affecting their survival rate.…”

“…However, the effect of photoperiod on growth performance is still confusing. Some fish have been reported to display high growth performance in long photoperiod such as Giant gourami, Trichogaster fasciata (Bano & Serajuddin, 2018), Gilthead sea bream, Sparus aurata L. (Gines, Afonso, Arguello, Zamorano, & Lopez, 2004), Red-eyed orange molly, Poecilia sphenops (Zutshi & Singh, 2017) and Topmouth gudgeon, Pseudoporasbora parva (Zhu et al, 2014). However, other fish species attain high growth rate in short photoperiods such as Juvenile lenok, Brachymystax lenok (Liu et al, 2015) and African catfish Clarias gariepinus (Mustapha, Okafor, Olaoti, & Oyelakin, 2012), while exposure to photoperiod did not affect growth performance in other species such as Juvenile halibut, Hippoglossus hippoglossus (Hallaråker, Folkvord, & Stefansson, 1995) and miiuy croaker, Miichthys miiuy (Shan, Xiao, Huang, & Dou, 2008).…”

Effects of Different Photoperiodic Regimes on the Body Mass, Behavioural and Stress Responses in Golden Mahseer, Tor putitora

“…Audet et al (1986) 33 working on Gasterosteus aculeatus, reported and emphasized that the level of cortisol remains high in the fish exposed to the short photoperiodic regime.Light differentiated into six distinct spectra (V, B, G, Y, O, R) in decreasing wavelength (Singh, 2006; Heydarnejad et al, 2017) 34,35 . Different light spectra act as environmental cues and affect the growth and reproduction and coordinate the different stages of life in fish (Zutshi & Singh, 2017, 2020) 24,36 . Water has optical properties which lead to the different light-absorbing pattern at different degrees.…”