Analysis the Effect of the Moon Phase in Optimization of Growth and Survival Mangrove Crabs (Scylla olivacea) in Silvofishery Systems

Asnur, Andi Nurfadilah
Karim, Muhammad Yusri
Azis, Hasni Yulianti

Torani Journal of Fisheries and Marine Science
Vol. 8 No. 1 (2024): VOLUME 8, NOMOR 1, DECEMBER 2024

Silvofishery is a cultivation activity in mangrove or mangrove areas, the type of biota that can be cultivated in mangrove areas using a silvofishery system, one of which is mangrove crab (Scylla olivacea). The research was carried out in the mangrove area of ​​Mandalle Village, Mandalle District, Pangkajene and Islands Regency, South Sulawesi Province. The test animal used was a male mangrove crab (S. olivacea) weighing 146–168 g which was kept in a circular bamboo cage with a diameter of 2.25 m. The results of the Kruskal Wallis analysis show that the moon phase has a significant effect on the absolute growth and daily growth rate of mud crabs, the dark moon phase produces the highest average absolute growth of 14.53 g with a daily growth rate of 0.57%/day. Meanwhile, the full moon phase produced the lowest average absolute growth of 7.82 g with a daily growth rate of 0.32%/day. The results of the Kruskal Wallis analysis showed that differences in lunar phases had no significant effect on the survival of mud crabs.