THE EFFECT OF THE SOAKING PERIOD IN NATURAL FEED TATTS of Chaetoceros sp. ON THE GROWTH AND VIABILITY OF PEARL CLASS (Pinctada maxima) SEEDS

Abstract

Pearl oysters are a marine aquaculture commodity with high economic value. However, there are still many obstacles in pearl oyster cultivation activities, such as the need for quality seeds. This study aims to determine the effect of immersing pearl seeds in natural feed tanks of Chaetocheros sp. with different immersion periods on the growth and survival rate of pearl oyster (Pinctada maxima) seeds. The method used in this study is an experimental method using a completely randomized design (CRD), with 5 treatments and 3 replications, namely A (control/without immersion), B (0.5 hours), C (1 hour), D (1, 5 Hours) and E (2 Hours). The results showed that soaking the seeds in natural feed tanks had a significant effect on the growth of the shell (dorsal-ventral) of the pearl oyster Pinctada maxima (p<0.05). The highest growth was achieved in the 2-hour immersion period with an absolute growth value of 1.67 mm, a relative growth of 68.49% from the initial size, and a daily specific growth rate of 3.31% per day. This method must be tested on larger pearl oyster seeds and using other natural feed species and various natural mixes (multi-species).

THE EFFECT OF THE SOAKING PERIOD IN NATURAL FEED TATTS of Chaetoceros sp. ON THE GROWTH AND VIABILITY OF PEARL CLASS (Pinctada maxima) SEEDS

“…Container used is container plastic and placed in a dark place, the feed used is feed experience Journal of Fish Health Vol. 2 (2) -December 2022 Fajry et al (2022) https://doi.org/10.29303/jfh. v2i2.1473 99 type phytoplankton from species Chaetoceros sp.…”

“…Journal of Fish Health Vol. 2 (2) -December 2022 Fajry et al (2022) https://doi.org/10.29303/jfh. v2i2.1473 105 so growth the more increase, p this caused because immersion in tub feed influential live to growth seed shell pearl, growth shell pearl determined in a manner directly by availability feed naturally exist around them (Hastuti et al, 2018).…”

“…which feed this easy caught by the seeds shell pearl, Sudirman et al (2013) convenience shell pearl in Journal of Fish Health Vol. 2 (2) -December 2022 Fajry et al (2022) https://doi.org/10.29303/jfh. v2i2.1473 106 utilise Chaetoceros sp.…”

“…Salinity and pH are one factor urgent in activity cultivation shell pearl, results measurement salinity During study range between 34-35 ppt, and a pH value of 7.4-7.9 (Appendix 6) value this optimal for support success growth and improve mark continuity life seed shell pearls, p this in accordance with Journal of Fish Health Vol. 2 (2) -December 2022 Fajry et al (2022) https://doi.org/10.29303/jfh. v2i2.1473 107 opinion Rosanawita et al (2017) where proper water pH conditions for activity mind range between 7-8.2.…”

“…Health Vol. 2 (2) -December 2022Fajry et al (2022) https://doi.org/10.29303/jfh. v2i2.1473 102 immersion) showed significant difference with treatment A (Control) and treatment B ( 0.5 hour immersion ) however no different significant with C, and D (Figure2).…”