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All Journal Sainteks Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences
Titi Chasanah
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Agriculture, Biological Sciences & Forestry Computer Science & IT Environmental Science Mechanical Engineering Medicine & Pharmacology

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PEMANFAATAN GULMA AIR UNTUK MENINGKATKAN PRODUKSI MIKROALGA Spirulina platensis SEBAGAI PAKAN ALAMI IKAN GURAMI Christiani Christiani; Titi Chasanah; Diana Retna Utarini Sri Rahayu
Sainteks Vol 10, No 1 (2013): SAINTEKS
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/sainteks.v10i1.225

Abstract

Stadium larvae of gourami fish are very sensitive because it has been not adapted well to the environment and their digestive system is also not perfect yet. Larvae do not have the stomach and their enzymatic activity is not optimal, so need a natural food in sufficient quantities. Proper feed formulation in addition to cost saving fish farmers are also desperately needed this study aims to determine the effect of Spirulina microalgae as a natural food with different weight and time of feeding on the growth and sustainability of gourami fish and to determine the formulation of a good natural food for fish larvae. This research used an experimental method with Split Plot Design in 3 times replication for each treatment combination microalgae cell concentrations as mainplot tested: 0, 50, 100, 150% of body weight and as a sub-plot was time of feeding: 1, 2 and 3 times per day. The results showed a feed formulations of Spirulina microalgae with different weight and timing of an effect on the growth of larvae compared with the control (giving Tubifex) and a natural feeding weighing 100% of body weight with a feeding time of 1 or 2 times to generate growth and survival of carp larvae Keywords: Spirulina platensis, weight, time of feeding, the larvae
Reproduction Characteristics of Rice Field Eel (Monopterus albus Zuieuw) on Several Functionally Changed Lands in Banyumas Regency Priyo Susatyo; Nuning Setyaningrum; Elly Tuti Winarni; Titi Chasanah; Atang Atang
Journal of Tropical Life Science Vol. 8 No. 2 (2018)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.08.02.12

Abstract

Functional change of agricultural lands into non-agricultural lands will obviously have an impact on the dimin-ished or loss of habitat of the rice field eels (Monopterus albus Zuieuw). The aim of this research was to un-derstand the difference between (1) reproduction parameters (fecundity, gonadal maturity level (GML), and gonadal maturity index (GMI); (2) histological features of female and male gonadal development (oogenesis and spermatogenesis); (3) range of body length in each sexual phase; and (4) range of body length in each GML stage of captured eel from 4 sub-districts of Banyumas regency, Central Java (Ajibarang, Sumpyuh, Banyumas, and Sumbang). The total number of captured subjects were 631 eels; which consisted of 155; 227; 157; and 92 eels from Ajibarang, Sumpyuh, Banyumas, and Sumbang, respectively. We observed oogenesis in the stages of GML-1 (chromatin nucleolar stages and perinucleolar stage); GML-II (cortical alveolar formation stage or globular yolk stage), GML-3 (late globular yolk stage), GML-IV (mature or ripe stage), and follicle atretic stage. Also, we observed male gonadogenesis and spermatogenesis in the intersex. The range of GMI of captured eels was between 0.023 and 0.686. Eel in GML-I, GML-2, GML-3, and GML-IV had GMI within the range of 0.023-0.096; 0.096-0.425; 0.427-0.686; and >0.686, respectively. Eels achieved stage of GML-IV in body length range of 22.6-34.5 cm in Sumpyuh, 22.6-38.5 cm in Ajibarang, and 26.6-34.5 cm in Banyumas. There was no eel with the status of GML-IV in Sumbang, which had the most residential or functionally changed lands in its area. Based on these findings, can be concluded that the condition of rice fields or habitat of eel in functionally changed lands may affect eel’s growth and gonad maturation.
Co-Authors Atang Atang Christiani Christiani Diana Retna Utarini Sri Rahayu Elly Tuti Winarni Nuning Setyaningrum Priyo Susatyo