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Adam Robisalmi
Research Institute For Fish Breeding Ministry of Marine Affairs and Fisheries Republic of Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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EVALUASI PERFORMA PERTUMBUHAN DAN HETEROSIS PERSILANGAN ANTARA IKAN NILA NIRWANA (OREOCHROMIS NILOTICUS) BETINA DENGAN IKAN NILA BIRU (OREOCHROMIS AUREUS) JANTAN F2 PADA KONDISI TAMBAK HIPERSALINITAS Adam Robisalmi; Bambang Gunadi; Priadi Setyawan
BERITA BIOLOGI Vol 19, No 1 (2020)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v19i1.3758

Abstract

Srikandi Tilapia is one of the superior hybridized varieties between black tilapia (Oreochromis niloticus) and blue tilapia (Oreochromis aureus). This fish has fast growth and high salinity tolerance. In its development, efforts are needed to improve and improve its genetic quality. Spawning srikandi tilapia using the parent of male blue tilapia F2 (family selection) is expected to improve performance better than the previous generation.The purpose of this study was to evaluate the growth performance and heterosis value of Srikandi tilapia produced from the extraction of female Nirwana strain tilapia with male blue tilapia F2. Hatchery activities were carried out in freshwater by mass spawning method on the 25 m2 pool. Enlargement activities were carried out at brackish water pond with salinity 25–40 g / L, using net measuring 3×5×1 m3 for 120 days. The stocking density used is 15 fishes / m2. The results of this study indicate that at the final test, the hybridization of Nw ♀x Au (F2)♂ has the best performance with the average of long gain16.60 ± 0.41cm, weight gain 215.33 ± 12.19 g and survival rate 78.50 ± 02.12. Evaluation of heterosis values on the characters of length, weight, survival, and biomass showed a positive value both on the hybridization of Nw ♀x Au (F2)♂ and Au (F2)♀x NW♂. The highest high parent heterosis value for blue tilapia broodstock is shown by population Nw ♀x Au (F2)♂ with values in each character of 6.96% (length), 26.06% (weight), 2.63% (survival), 28.57% (biomass). 
ESTIMASI HERITABILITAS DAN RESPONS SELEKSI IKAN NILA HITAM (Oreochromis niloticus) DI TAMBAK Adam Robisalmi
BERITA BIOLOGI Vol 18, No 1 (2019)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v18i1.3540

Abstract

Genetic improvement in the establishment of a rapid growth strain of Nile tilapia might be achieved through selective breeding program This research was aimed to estimate heritability and response selection of nile tilapia in brackishwater pond. Breeding  activity was carried out in fresh water in hapa 2x1x1 m. Males and females were breeding in pairs with a ratio of 1: 1. The number of established families was 19 families of 50 broodstock pairs. Harvesting of larvae was done on day 14. Larvae were collected and then kept in net 2 x 2 x1 m  with stocking density 125 fish/m2 for 60 days. The next stage was sexing  by grouping the male and female populations in each family. Grow out was carried out in net cage (3 x 5 x1.5 m ) that were placed in brackiswater pond at salinity 25–30 g/L with density 10 fish/m2.  Selection of broodstock in the male and female populations was done on weight of 250–300 g. Cut off selection was determined on weight from 316 to 382g (male) and 221–315 g (female). The results of this study showed that the estimation value for heritability of male and female were 0.42 ± 0.22 and 0.42 ± 0.23 and the estimation value for response selection were 10.66% (male) and 10.92% (female).   
Growth Evaluation of Red Tilapia (Oreochromis spp) Under Different Cycles of Fasting And Re-Feeding Adam Robisalmi
BERITA BIOLOGI Vol 21, No 3 (2022): Berita Biologi
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v21i3.4040

Abstract

Feed restriction through fasting is a widely recommended feed management strategy in aquaculture, where this strategy is believed to have a positive effect on fish growth performance. This study aims to evaluate the growth performance of red tilapia in various cycles of fasting and re-feeding. The activity was carried out at Research Institute Fish Breeding from August to November 2020  . The research method used was experimental with 5 treatments with 4 replications, namely control (fish were fed daily), then the fasting treatment was S7 (7 days of fasting), S14 (14 days of fasting), S21 (21 days of fasting) and S28 (28 fasting day) followed by refeeding until the end of maintenance. Maintenance was carried out for 90 days in a concrete tub measuring 2x1m3 with a stocking density of 28 fishes / unit. During the rearing period the fish were fed satiation three times a day. The results showed that there was a decrease in growth along with the increase of the fasting period, but there was a trend of increasing growth after re-feeding with over compensatory growth in treatment S7 and partial compensatory growth in treatments S14 and S21. Likewise, the value of the condition factor and the hepatosomatic index during the fasting period decreased, but after feeding, the values were not different from those of fish fed continuously.
Co-Authors Bambang Gunadi Priadi Setyawan