scholarly journals Management Strategies for Nile Tilapia (Oreochromis niloticus) Hatchery in the Face of Climate Change Induced Rising Temperature

2021 ◽  
Vol 21 (2) ◽  
pp. 55-62
Author(s):  
S. M. Ashiqul Alam ◽  
Md. Shirajul Islam Sarkar ◽  
Md. Mahbubul Alam Miah ◽  
Harunur Rashid
Keyword(s):  
Climate Change ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Egg Production ◽  
Management Strategies ◽  
Commercial Fish ◽  
Nile Tilapia Oreochromis Niloticus ◽  
The Face ◽  
Increasing Temperature ◽  
And Control

In the quest for appropriate management strategies for less egg production in Nile tilapia (Oreochromis niloticus) due to climate change induced increasing temperature, five treatments (T): shade with cloth over brood hapa (T1), increase in pond depth (T2), aeration (T3), combination of above three interventions (T4) and control (no intervention) (T5) were investigated in a commercial hatchery in Mymensingh, Bangladesh during April to September. Mean egg production in T1, T2, T3, T4 and T5 was 20488, 15369, 3596, 21021 and 3979 eggs/hapa, respectively. T1 was the best strategy considered due to efficiency and simplicity. In May T1, T2, T3, T4 and T5 produced highest 30859, 36119, 8997, 45876 and 5506 eggs/hapa at 29.69°C, 30.12°C, 29.96°C, 29.61°C, and 31.26°C temperature, respectively. The most suitable water temperature for highest egg production (20365 eggs/hapa) was 29-31°C. Egg production above 32°C was found to be very low (179 eggs/hapa). Suitable ranges of dissolved oxygen, pH, alkalinity, ammonia and turbidity for egg production were found to be 4.5-6.0 mg/L, 8.0-8.8, 105-150 mg/L, 0-0.5 mg/L and 15-35 cm, respectively. In high temperature months commercial fish hatcheries should use shed with cloth over brood hapa to produce higher amount eggs.

scholarly journals Hematology of Nile tilapia (Oreochromis niloticus) subjected to anesthesia and anticoagulation protocols

2015 ◽  
Vol 36 (6Supl2) ◽  
pp. 4237
Author(s):  
Nadia Cristine Weinert ◽  
Julieta Volpato ◽  
Ádson Costa ◽  
Rozyanne Rosa Antunes ◽  
Aldo Camargo de Oliveira ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Hematological Parameters ◽  
Prognostic Indicator ◽  
Control Group ◽  
Average Weight ◽  
Commercial Fish ◽  
Pathological Conditions ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Apparently Healthy

<p>Clinical hematology facilitates the diagnosis of disease and can act as a prognostic indicator of pathological conditions in fish. The aim of the present study was to evaluate hematological parameters of Nile tilapia (<em>Oreochromis niloticus</em>) subjected to different anesthetics and anticoagulants. Thirty apparently healthy fishes (average weight of 473 ± 35. 50 g and mean total length of 29. 33 ± 0. 37 cm), were selected from the local commercial fish farm in the Lages municipality (Santa Catarina, Brazil). The animals were randomly divided into three groups of 10. In two groups, anesthesia was induced with eugenol (70 mg·L- 1) (EG) and Benzocaine hydrochloride (100 mg·L-1) (BG), respectively. Anesthesia was not administered to fish of the third group (CG/control group). Blood samples were obtained by venipuncture of the caudal vessels and placed into microtubes containing sodium heparin or Na2EDTA for further analysis. The results were analyzed by Sigma Stat for Windows, the paired t-test for significant differences between anticoagulants of the same group, and analysis of variance followed by the Tukey test for comparison of means between groups (p ? 0. 05). Most of the observed changes in the erythrogram were significantly higher for the anticoagulant heparin and benzocaine group in comparison to the control group. However, the values obtained for the leukogram were significantly higher for all groups subjected to the Na2EDTA anticoagulant, suggesting that heparin may cause cell clumping. The results suggest that the anesthetics under investigation effectively minimizes the effects of stress caused by handling and invasive procedures, and that the anticoagulant heparin causes less hemolysis in comparison to Na2EDTA for Nile tilapia. Thus, the hematological variations attributed to different anesthetic protocols and/or different anticoagulants should be considered for the species <em>Oreochromis niloticus. </em></p>

scholarly journals Economic feasibility of probiotic use in the diet of Nile tilapia, Oreochromis niloticus, during the reproductive period

2020 ◽  
Vol 42 ◽  
pp. e47960
Author(s):  
Danielle de Carla Dias ◽  
Fernanda de Paiva Badiz Furlaneto ◽  
Fábio Rosa Sussel ◽  
Leonardo Tachibana ◽  
Giovani Sampaio Gonçalves ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Egg Production ◽  
Reproductive Period ◽  
Economic Feasibility ◽  
Feed Additive ◽  
Total Cost ◽  
Treatment Groups ◽  
Nile Tilapia Oreochromis Niloticus

This work examines the economic advantages of probiotic use in the diet of Nile tilapia broodstock during the reproductive period. For this purpose, Bacillus subtilis was applied as a feed additive. The experimental design was completely randomized with three treatment groups: the T0 control (without probiotic), the T1 continuous probiotic intake, and the T2 alternate probiotic intake at a dose of 0.50 g kg-1 of feed (1010 CFU g-1) with four replicates. For the reproduction assay, 118 females and 48 males of Nile tilapia (proportion 4 males:9 females. hapa-1) (weight 527.65 g ± 185.98 g and length 30.16 cm ± 3.57 cm) were distributed into 12 hapas (3.5 × 2.0 × 1.5 m). Reproductive variables (spawning female percentage, egg production, and fry production) were used to calculate the economic feasibility indexes (total cost of nutrition [TcN], gross revenue [GR], and total operational profit [ToP]). The results show increasing values for spawning female number, collected eggs, and surviving fry in the probiotic groups. We recommend continuous intake of probiotic (feed with addition of probiotic) at a dose of 0.5 g kg-1 of feed (1010 CFU g-1) during the breeding season of Nile tilapia, due to the suitable reproductive indexes and profitability.

scholarly journals Polyculture and growth of the Nile tilapia Oreochromis niloticus (Perciformes:Cichlidae) with shrimp Litopenaeus vannamei (Decapoda:Penaeidae) in sea water

2013 ◽  
Vol 5 (2) ◽  
pp. 241-244
Author(s):  
A.A. Ortega-Salas ◽  
L.A. Rendón M. ◽  
R. Beltrán-Alvarez ◽  
A. Tintos-Gómez
Keyword(s):  
Litopenaeus Vannamei ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Water Exchange ◽  
Sea Water ◽  
Total Biomass ◽  
Feed Conversion ◽  
Biomass Density ◽  
Commercial Fish ◽  
Nile Tilapia Oreochromis Niloticus

Globally, the tilapia is the second most important group of commercial fish. Polyculture and growth were studied for 181 Nile tilapia, Oreochromis niloticus, in a seawater pond (30-37‰) at a density of 50 fish/m3 for six months (October to April) with 30 shrimp Litopenaeus vannamei at a density of 8 shrimp/m3 in two months (December-February) in an open tank of 3,6 m3. They were fed Camaronina”pellets” at libitum in the morning. The pond bottom was siphoned every other day, was maintained with constant aeration. Water exchange was 80% every two weeks. The temperature varied from 18 to 32oC. The tilapia grew from 72mm to 220mm, and 7g to 232g, survival was 92%. The total biomass was 38,6 kg. The shrimp grew from 6,8 g to 11,5 g and 102mm to 121mm. The survival rate was 100%. Total biomass was 219g. The feed conversion ratio (FCR) was 1,3:1,0 in both species. There was no problem between species; this polyculture is recommended.KEY WORDSPolyculture, growth, Litopenaeus vannamei, Oreochromis niloticus, biomass, density

scholarly journals Hematology of Nile tilapia (Oreochromis niloticus) subjected to anesthesia and anticoagulation protocols

2015 ◽  
Vol 36 (6Supl2) ◽  
pp. 4237
Author(s):  
Nadia Cristine Weinert ◽  
Julieta Volpato ◽  
Ádson Costa ◽  
Rozyanne Rosa Antunes ◽  
Aldo Camargo de Oliveira ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Hematological Parameters ◽  
Prognostic Indicator ◽  
Control Group ◽  
Average Weight ◽  
Commercial Fish ◽  
Pathological Conditions ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Apparently Healthy

Clinical hematology facilitates the diagnosis of disease and can act as a prognostic indicator of pathological conditions in fish. The aim of the present study was to evaluate hematological parameters of Nile tilapia (Oreochromis niloticus) subjected to different anesthetics and anticoagulants. Thirty apparently healthy fishes (average weight of 473 ± 35. 50 g and mean total length of 29. 33 ± 0. 37 cm), were selected from the local commercial fish farm in the Lages municipality (Santa Catarina, Brazil). The animals were randomly divided into three groups of 10. In two groups, anesthesia was induced with eugenol (70 mg·L- 1) (EG) and Benzocaine hydrochloride (100 mg·L-1) (BG), respectively. Anesthesia was not administered to fish of the third group (CG/control group). Blood samples were obtained by venipuncture of the caudal vessels and placed into microtubes containing sodium heparin or Na2EDTA for further analysis. The results were analyzed by Sigma Stat for Windows, the paired t-test for significant differences between anticoagulants of the same group, and analysis of variance followed by the Tukey test for comparison of means between groups (p ? 0. 05). Most of the observed changes in the erythrogram were significantly higher for the anticoagulant heparin and benzocaine group in comparison to the control group. However, the values obtained for the leukogram were significantly higher for all groups subjected to the Na2EDTA anticoagulant, suggesting that heparin may cause cell clumping. The results suggest that the anesthetics under investigation effectively minimizes the effects of stress caused by handling and invasive procedures, and that the anticoagulant heparin causes less hemolysis in comparison to Na2EDTA for Nile tilapia. Thus, the hematological variations attributed to different anesthetic protocols and/or different anticoagulants should be considered for the species Oreochromis niloticus.

Feeding management strategies to optimize the use of suspended feed for Nile tilapia ( Oreochromis niloticus ) cultivated in bioflocs

2019 ◽  
Vol 51 (2) ◽  
pp. 605-615 ◽  
Author(s):  
Marcos Antônio Silva ◽  
Érika Ramos Alvarenga ◽  
Franklin Fernando Batista da Costa ◽  
Eduardo Maldonado Turra ◽  
Gabriel Francisco de Oliveira Alves ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Management Strategies ◽  
Feeding Management ◽  
Nile Tilapia Oreochromis Niloticus

scholarly journals PENINGKATAN KEKEBALAN SPESIFIK ANTI STREPTOCOCCUS PADA BUDI DAYA IKAN NILA

2016 ◽  
Vol 2 (1) ◽  
pp. 87
Author(s):  
Hambali Supriyadi ◽  
Desy Sugiani ◽  
Uni Purwaningsih
Keyword(s):  
Immune Response ◽  
Survival Rate ◽  
Field Study ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Vaccine Delivery ◽  
Streptococcus Iniae ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Net Cage ◽  
And Control

Uji lapang vaksin Streptococcus telah dilakukan dengan tujuan untuk mengetahui efektivitas vaksin dan respon kebal pada ikan nila (Oreochromis niloticus) terhadap rangsangan yang diberikan. Penelitian dilakukan pada keramba jaring apung (KJA). Vaksin yang digunakan adalah vaksin S1N8 dan GM2.4 berupa vaksin yang diinaktivasi dengan formalin 0,3%. Aplikasi vaksin dilakukan secara bertahap yaitu vaksin awal (priming) diberikan melalui rendaman, sedangkan vaksin ulang diberikan melalui suntikan. Dosis vaksin awal yaitu 10 mL vaksin/100 L air untuk 1.000 ekor ikan direndam selama 15 menit, sedangkan booster diberikan melalui suntikan 0,2 mL/ ekor ikan. Hasil menunjukkan bahwa kombinasi pemberian vaksin priming melalui rendaman dan booster dengan suntikan untuk vaksin S1N8 menghasilkan sintasan paling tinggi (70,3%—72,5%), apabila dibandingkan dengan vaksin GM2.4 (59,3%— 62,5%) dan kontrol (35,5%—42,0%).Field study of vaccines S1N8 and GM2.4 with the aims to evaluate the effectiveness of vaccine and the immune response of nile tilapia ( Oreochromis niloticus ) against the vaccines. The research have been conducted in floating net cage. Vaccine tested were produced from Streptococcus iniae isolates S1N8 and GM2.4 which was prepared by formalin killed of 0.3%(v/v). Vaccine delivery were given in two steps i.e. priming with immersion, and booster through injection. The dose of vaccine for priming was 10 mL of vaccine/100 L water immersed for 1,000 fish for 15 minutes. Booster were delivered by injection as much as 0.2 mL/fish. The results indicated that combination of vaccine delivering of immersion (priming) and injection (booster) especially for S1N8 vaccine were the highest percent of survival rate (70.3%—72.5%) as compared with GM2.4 vaccine (59.3%—62.5%) and control (35.5%—42.0%).

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