scholarly journals Coexistence effect of rotifer, Brachionus rotundiformis and copepod, Oithona similis in culture media on growth performance and eggs production

2019 ◽  
Vol 20 (8) ◽  
Author(s):  
Suminto Suminto ◽  
Diana Chilmawati
Keyword(s):  
Growth Rate ◽  
Population Growth ◽  
Growth Performance ◽  
Mass Culture ◽  
Egg Production ◽  
Population Growth Rate ◽  
Culture Media ◽  
Brachionus Rotundiformis ◽  
Oithona Similis ◽  
Final Density

Abstract. Suminto, Chilmawati D. 2019. Coexistence effect of rotifer, Brachionus rotundiformis and copepod, Oithona similis in culture media on growth performance and eggs production. Biodiversitas 20: 2396-2402. The effect of Brachionus rotundiformis, and Oithonasimilis coexistence in culture media on the growth performance and egg production were examined and it aims to know the best coexistence percentage which provides the highest growth performance and egg production of O. similis and B. rotundiformis. Experiment method was carried out in this research by using a completely randomized design (CRD) with 5 treatments and 4 replications. The treatments were percentage through mix culture ratio of O.similis. and B. rotundiformis whereas those treatments were with ratio of 100% and 0% (A); 90% and 10% (B); 80% and 20% (C); 70% and 30% (D); and 60% and 40% (E), respectively. The results showed that, B. rotundiformis had a significant effect (p <0.05) on final density, population growth rate and eggs production of Oithona sp.; coexistence of 60% Oithona sp. and 40% B. rotundiformis provides the best final density for Oithona sp. (27.40±0.34 ind./ml) and B. rotundiformis (30.23±0.21 ind./ml); the highest population growth rate of Oithona sp. (0.29±0.02 ind./day) and B. rotundiformis (0.36±0.03 ind./day); and the highest egg production of Oithona sp. (18.83±0.76 eggs/ind) and B. rotundiformis (3.30±0.24 eggs/ind.). However, the mix culture of O.similis. and B. Rotundiformis may be applied in co-existent semi-mass or mass culture.

scholarly journals Organic Feed Enrichment Effects toward Growth Performance and Egg Production of Oithona similis

Omni-Akuatika ◽  
2020 ◽  
Vol 16 (3) ◽  
pp. 128
Author(s):  
Diana Chilmawati ◽  
Johannes Hutabarat ◽  
Sutrisno Anggoro ◽  
Suminto Suminto
Keyword(s):  
Optimum Condition ◽  
Growth Performance ◽  
Protein Content ◽  
Egg Production ◽  
Culture Media ◽  
Total Density ◽  
Optimum Point ◽  
Oithona Similis ◽  
The Difference ◽  
Feed Protein

The optimum condition of culture media and feed diets which fit the necessities of Oithona similis life (ecophysiological) is very important for it to grow and develop in its maximum. The enrichment of O. similis feed can be done by adding fermented organic feed. Providing organic feed with optimum protein content is necessary to support the growth process and reproduction of O. similis. Osmoregulation process of water organism which is influenced by media salinity is related to bioenergetics process as the effort to use feed energy for the growth. This research aimed to examine the effect of different organic feed protein content and to determine the optimum point which may result in the best growth and egg production of O. similis in the optimum condition of culture media. The study used an experimental method with a completely random design consisting of 4 treatments and 4 repetitions each, i.e. O. similis culture with A. 25%; B. 30%; C. 35%; and D. 40% organic feed protein content. The results showed that the difference of protein content in organic feed affects the growth and production of O. similis eggs. The optimum point of protein content in the fermented organic feed is on protein content B, i.e. 30%, which resulted in the best growth performance (70.44 ± 0.43 ind.mL-1 total density, 0.213 ± 0.001.day-1 population growth rate, and 27.38 ± 0.48 eggs.ind-1 egg production. (ttujuan dan pembahasan harus past tense), Tujuan di abstrak minimal harus menggambarkan atau sama denga tujuan di pendahuluan)Keywords: enrichment, Oithona similis, organic feed, protein, reproduction

scholarly journals Effects of Aeration Flow Rate in the Culture Medium on the Growth Performance and Egg Production of Copepod Oithona similis Fed with Fermented Organic Diet

2020 ◽  
Vol 147 ◽  
pp. 01006
Author(s):  
Diana Chilmawati ◽  
Johannes Hutabarat ◽  
Sutrisno Anggoro ◽  
Suminto Suminto
Keyword(s):  
Growth Performance ◽  
Flow Rate ◽  
Egg Production ◽  
Culture Medium ◽  
Culture Media ◽  
Fish Larvae ◽  
Individual Growth ◽  
Total Density ◽  
Oithona Similis ◽  
The Individual

The availability of copepod Oithona similis as live food organism for shrimp and marine fish larvae is strongly influenced by the optimum feed and environment conditions. Optimization of dissolved oxygen (DO) for O. similis can be carried out by providing proper aeration in culture media. Feeding with fermented organic diet besides phytoplankton is expected to support the individual growth, metabolism, and reproduction of O. similis. The aim of this study was to examine the effect of different aeration flow rates on the growth performance and egg production of O. similis and to determine the optimum aeration flow rate. Completely Randomized Design Experiment used in this study with 4 treatments and 4 replications. The treatment was O. similis culture with different aeration flow rate of 0.00; 22.00; 45.67; 66.67 mL.second-1. The results showed that the difference aeration flow rate significantly affected (p <0.05) the growth performance and egg production of O. similis. The aeration flow rate of 45.67 mL.second-1 provided the best growth performance with total density of 81.25 ± 2.99 ind.mL-1; population specific growth rate 0.220 ± 0.002 day-1; and egg production28.40 ± 0.48 eggs.ind-1. Moreover, the optimum aeration flow rate culture medium for O. similis is 45.70 mL.second-1.

scholarly journals Biological scaling in green algae: the role of cell size and geometry

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Helena Bestová ◽  
Jules Segrestin ◽  
Klaus von Schwartzenberg ◽  
Pavel Škaloud ◽  
Thomas Lenormand ◽  
...  
Keyword(s):  
Growth Rate ◽  
Population Growth ◽  
Population Growth Rate ◽  
Internal Diffusion ◽  
Scaling Exponent ◽  
Power Scaling ◽  
Nutrient Distribution ◽  
Metabolic Scaling ◽  
Key Factor ◽  
Size And Morphology

AbstractThe Metabolic Scaling Theory (MST), hypothesizes limitations of resource-transport networks in organisms and predicts their optimization into fractal-like structures. As a result, the relationship between population growth rate and body size should follow a cross-species universal quarter-power scaling. However, the universality of metabolic scaling has been challenged, particularly across transitions from bacteria to protists to multicellulars. The population growth rate of unicellulars should be constrained by external diffusion, ruling nutrient uptake, and internal diffusion, operating nutrient distribution. Both constraints intensify with increasing size possibly leading to shifting in the scaling exponent. We focused on unicellular algae Micrasterias. Large size and fractal-like morphology make this species a transitional group between unicellular and multicellular organisms in the evolution of allometry. We tested MST predictions using measurements of growth rate, size, and morphology-related traits. We showed that growth scaling of Micrasterias follows MST predictions, reflecting constraints by internal diffusion transport. Cell fractality and density decrease led to a proportional increase in surface area with body mass relaxing external constraints. Complex allometric optimization enables to maintain quarter-power scaling of population growth rate even with a large unicellular plan. Overall, our findings support fractality as a key factor in the evolution of biological scaling.

Sign in / Sign up

Export Citation Format

Share Document