Effects of exogenous hormones and broodstock age on the spawning response of captive silver therapon Leiopotherapon plumbeus

View/ Open
Request this document
Date
2022Page views
43Metadata
Show full item recordCited times in Scopus
Share
Abstract
Evaluation of appropriate hormone and ideal broodstock age for optimal breeding efficiency may ensure the production of good quality eggs and larvae in the hatchery. In this study, the spawning response of captive silver therapon Leiopotherapon plumbeus to various hormonal treatments and broodstock age was examined. In Experiment 1, spawning success, latency period, absolute and relative fecundity, fertilization and hatching rates, and larval production of female silver therapon broodstock were determined after ovulation and spawning in response to human chorionic gonadotropin (hCG; 5000 and 10,000 IU/kg), Ovaprim (0.5 ml/kg), hCG + Ovaprim (5000 IU + 0.5 ml/kg; 10,000 IU + 0.5 ml/kg) or hCG + domperidone (5000 IU + 0.5 ml/kg; 10,000 IU + 0.5 ml/kg). In Experiment 2, reproductive performance of four domesticated broodstock age groups (1+, 2+, 3+ and 4+-year old) was examined for five consecutive months, coinciding with the spawning season. Higher dose of hCG + Ovaprim resulted in higher spawning (100%), fertilization (99.7 ± 0.1%), and hatching (85.8 ± 5.5%) rates than the other treatments. The effect of age on reproductive indices was not significant. However, better spawning performance was observed in 1+ to 3+-year old broodstock, with higher fertilization (96.8–98.5%) and hatching (63.7%–77.2%) rates than among the oldest age group (82.9% and 57.2%). Together, results suggest that the combination of hCG + Ovaprim is highly effective in inducing ovulation and spawning in silver therapon, and that domesticated broodstock up to 4+ years of age could still be used for breeding activities and seed production.
Suggested Citation
Aya, F., Sayco, M. J. P., & Garcia, L. (2022). Effects of exogenous hormones and broodstock age on the spawning response of captive silver therapon Leiopotherapon plumbeus.Subject
Taxonomic term
Collections
- AQD Journal Articles [1158]
Related items
Showing items related by title, author, creator and subject.
-
Biology and hatchery rearing of the silver therapon Leiopotherapon plumbeus
Aya, Frolan; Garcia, LM (Aquaculture Department, Southeast Asian Fisheries Development Center, 2020-07) -
Restoration and Enhancement of Fisheries in Philippine Lakes and Reservoirs
Palma, Adelaida L. (Training Department, Southeast Asian Fisheries Development Center, 2016)Inland water resources of the Philippines host some 348 freshwater fishes, of which 16% are endemic and 56% indigenous (FishBase 2013). Although production from inland capture fisheries accounts for only 7.8% of the total ... -
Diet composition, feed preferences and mouth morphology of early stage silver therapon (Leiopotherapon plumbeus, Kner 1864) larvae reared in outdoor tanks
Aya, Frolan; Corpuz, M. N. C.; Garcia, LM (Wiley, 2015)This study examined the diet composition, feeding preferences, and mouth morphology of the silver therapon (Leiopotherapon plumbeus, Kner 1864) larvae under captive conditions. Larvae were reared in outdoor tanks (4 ...