Reproduction of Celebes rainbowfish, Marosatherina ladigesi Ahl, 1936 in Pattunuang and Batu Puteh Rivers, South Sulawesi

Abstract

<jats:p>Marosatherina ladigesi is one of endemic fishes in South Sulawesi and also as ornamental fish. Anthropogenic activities such as destructive fishing and degradation caused by the dredging of sand carried M. ladigesi to the red list of threatened IUCN category as vulnerable species. Accordingly, conservation efforts are needed to maintenance fish population in its habitat. The biologic information for conservation is reproduction of fishes. This research aimed to described reproduction of Celebes rainbow fish including sex ratio, gonad maturity, gonado-somatic index, fecundity, and distribution of egg diameter in Pattunuang and Batu Puteh Rivers, South Sulawesi. This research was conducted from May 2018 to April 2019. The result showed that the sex ratio in Pattunuang and Batu Puteh rivers were 1,00:1,60 and 1,00:1,08, respectively. This species spawned from the end of dry season to the early rainy season. Fecundity of fish in Pattunuang and Batu Puteh rivers were 22-795 eggs and 69-571 eggs, respectively. Based on distribution of egg diameter, Celebes rainbowfish categorized as total spawner. For the conservation of this species is recommended to catch restrictions in the spawning season and for male fish, and needs to be proposed the conservation in situ to determine both of rivers as reservoir area because these habitats are a source of germplasm.</jats:p>

Reproduction Potential of Medaka Fish (Oryzias profundicola) as an Endemic Fish in Lake Towuti

“…In Matano medaka fish (O. matanensis) a greater fecundity was recorded compared to the medaka fish (O. profundicola), with 22-180 eggs (Eragradhini, 2020). The occurrence of low fecundity in a fish species is thought to be related to its small body shape, as is the case with the beseng-beseng fish in the Maros River (Jayadi et al, 2016).…”

Reproduction potential of the Medaka fish (Oryzias profundicola) as an endemic fish in Lake Towuti

“…Matano medaka fish (O. matanensis) found greater fecundity than medaka fish (O. profundicola), namely 22-180 eggs (Eragradhini, 2020). The occurrence of low fecundity in a fish species _______________________________________________________________________________ is thought to be related to its small body shape, as is the case with the beseng-beseng fish in the Maros River (Jayadi et al, 2016).…”

“…The IKG value of the endemic bonti-bonti fish in Lake Towuti is relatively small for male fish compared to female fish (Andy Omar et al, 2012;Nasution et al, 2010). The IKG value of female beseng-beseng fish is greater than the IKG value of males (Jayadi et al, 2016). The IKG value of female Glossogobius giuris fish is higher than that of males in Lake Limboto (Juliana et al, 2018).…”

The Effect of Natural (Daphnia Sp.) and Different Synbiotic Feed on Rainbow Celebes (Marosatherina ladigesi) Growth Performance and Survival Rate

“…In the fish body, mortality is affected by differences in age and ability to adapt to the environment. Meanwhile, the external factors include abiotic conditions, competition between species, lack of food, handling, catching, and increasing the number of fish populations in the same space and also heat stress factor (Nasyrah et al 2019). Based on the research, the lowest survival rate was found in the 90% artificial feed treatment group.…”