scholarly journals Dietary live yeast (Debaryomyces hansenii) provides no advantages in tropical gar, Atractosteus tropicus (Actinopterygii: Lepisosteiformes: Lepisosteidae), juvenile aquaculture

2021 ◽  
Vol 51 (3) ◽  
pp. 311-320
Author(s):  
Iris Adriana Hernández-López ◽  
Dariel Tovar-Ramírez ◽  
Susana De la Rosa-García ◽  
Carina Shianya Álvarez-Villagómez ◽  
Gloria Gertrudys Asencio-Alcudia ◽  
...  

Tropical gar, Atractosteus tropicus Gill, 1863, is an ancient freshwater fish that is commercially cultivated in southern Mexico. Currently, there is a specific diet for its culture; however, the addition of probiotics has not been investigated. The objective of this study was to evaluate the supplementation of live yeast Debaryomyces hansenii for A. tropicus juveniles on growth, productive parameters, survival, somatic index, digestive enzyme activity, and immune system gene expressions (interleukin 10, il-10, Transforming growth factor β1, tgf-β1, and β2 microglobulin, b2m). Three experimental diets increased the dose of live yeast (0.5, 1.0, and 1.5%; 1014, 1015, and 1016CFU g diet–1, respectively) and a control diet (CD; without yeast) were designed. Daily weight gain and specific growth rate were higher in fish fed with CD and 0.5% D. hansenii. High activities of trypsin, chymotrypsin LAP, and α-amylase, as well as overexpression of il-10 in the spleen, were detected in fish feed 0.5% D. hansenii. The inclusion of D. hansenii had no positive effect on aquaculture for A. tropicus, lower doses should be tested to optimize the diet.

2021 ◽  
Vol 51 (3) ◽  
pp. 311-320
Author(s):  
Iris Adriana Hernández-López ◽  
Dariel Tovar-Ramírez ◽  
Susana De la Rosa-García ◽  
Carina Shianya Álvarez-Villagómez ◽  
Gloria Gertrudys Asencio-Alcudia ◽  
...  

Tropical gar, Atractosteus tropicus Gill, 1863, is an ancient freshwater fish that is commercially cultivated in southern Mexico. Currently, there is a specific diet for its culture; however, the addition of probiotics has not been investigated. The objective of this study was to evaluate the supplementation of live yeast Debaryomyces hansenii for A. tropicus juveniles on growth, productive parameters, survival, somatic index, digestive enzyme activity, and immune system gene expressions (interleukin 10, il-10, Transforming growth factor β1, tgf-β1, and β2 microglobulin, b2m). Three experimental diets increased the dose of live yeast (0.5, 1.0, and 1.5%; 1014, 1015, and 1016CFU g diet–1, respectively) and a control diet (CD; without yeast) were designed. Daily weight gain and specific growth rate were higher in fish fed with CD and 0.5% D. hansenii. High activities of trypsin, chymotrypsin LAP, and α-amylase, as well as overexpression of il-10 in the spleen, were detected in fish feed 0.5% D. hansenii. The inclusion of D. hansenii had no positive effect on aquaculture for A. tropicus, lower doses should be tested to optimize the diet.


Fishes ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 27 ◽  
Author(s):  
Karen Nieves-Rodríguez ◽  
Carlos Álvarez-González ◽  
Emyr Peña-Marín ◽  
Fernando Vega-Villasante ◽  
Rafael Martínez-García ◽  
...  

2018 ◽  
Vol 66 (3) ◽  
pp. 1298
Author(s):  
Miguel Saenz de Rodrigáñez ◽  
Federico Vladymir Aguilar-Tellez ◽  
Francisco Javier Alarcón-López ◽  
Ruth Pedrosa-Islas ◽  
Emyr Saul Peña-Marín ◽  
...  

Four microencapsulated diets were evaluated with respect to the growth and survival of tropical gar Atractosteus tropicus larvae. The treatments consisted of four experimental diets and one control diet 1) fish meal, 2) a combination of pork and poultry meals, 3) Nannochloropsis gaditana meal, 4) enzyme preparation and the control treatment 5) Artemia nauplii. The evaluation indicated that the larvae fed the Artemia nauplii obtained the greatest growth and survival (3.93 cm, 0.19 g y 82 % respectively), which justifies a correct culture system operation. While larvae fed microencapsulated diets best values in survival were observed with diets Nannochloropsis gaditana and enzyme preparation (20.0 and 19.2 %). Our results showed that microencapsulated could be used to feed A. tropicus in feasibly form. However, more information concerning to optimize the design and manufacturing are required to improve the growth and survival of organisms.


2017 ◽  
Vol 3 (1) ◽  
pp. 103-108
Author(s):  
Md Sirazul Islam ◽  
M Mamnur Rashid ◽  
Mohammad Shamsul Arefin ◽  
Pronab Naha ◽  
Md Rokanuddula

A study was conducted to determine the efficacy of three most commonly used growth promoters from different pharmaceutical companies on growth performance of hybrid walking catfish (Clarias batrachus × Clarias gariepinus). The experiment was done in the wet laboratory of the Department of Aquaculture, BAU, Mymensingh, with a total of 10 aquaria and 160 fish having mean initial weight of 6.3 ± 0.48 g. The three growth promoters, “Charger gel” from Fishtech (BD) Ltd., “Growth gel” from Advance Agrotech (BD) Ltd. and “Hepaprotect-aqua” from Renata Animal health Ltd., were used in separate nine (9) aquaria at recommended, lower dose and higher dose respectively. One aquarium was used as control (diet without any growth promoter). The fish were fed with paragon nursery floating feed at 20% of body weight in each aquarium for 28 days. Doses of Charger gel were given as 80, 60 and 100 mg/20 g feed/day, that of Growth gel, 0.14, 0.12 and 0.16 ml/20 g feed/day and of Hepaprotect-aqua, 30, 15 and 50 mg/20 g feed/day. Re-circulatory system was used throughout the experimental period. By applying recommended, lower and higher dose of “Charger gel”, mean final weights were found as 23.0, 21.9 and 35.9 g; average daily weight gain as 0.60, 0.56 and 1.06 g and specific growth rate (SGR) as 2.01, 1.93 and 2.70% respectively. For “Growth gel”, mean final weights were found as 22.8, 17.3 and 31.1 g; average daily weight gain as 0.59, 0.39 and 0.88 g and SGR as 1.99, 1.57 and 2.48 % respectively. For “Hepaprotect-aqua”, mean final weights were found as 24.2, 17.5 and 28.2 g; average daily weight gain as 0.64, 0.40 and 0.78 g and SGR as 2.09, 1.58 and 2.32% respectively. In all the cases survival rates were 100%. All the three growth promoters showed better results at their higher doses in comparison to their results in lower and recommended doses. However, in average Charger gel showed the best result than the other two growth promoters. This information on the efficacy study of growth promoters needs to be disseminated to the farmers for improved fish production.Asian J. Med. Biol. Res. March 2017, 3(1): 103-108


2017 ◽  
Vol 18 (2) ◽  
pp. 369-377 ◽  
Author(s):  
Alma Violeta CORDOVA-TORRES ◽  
Roberto Germano COSTA ◽  
Ariosvaldo Nunes de MEDEIROS ◽  
José Teodorico ARAÚJO FILHO ◽  
Alenice Ozino RAMOS ◽  
...  

SUMMARY A lack of water in livestock production can limit the performance of the animals; therefore, the objective of this study was to evaluate the effect of water restriction on the growth performance of sheep that were fed forage cactus (Nopalea cochenillifera). Forty-two male sheep were used, with an average age and weight of ±100 days and 18.75 ± (2,05) kg , respectively, and they were fed diets containing concentrate, mineral mixture and three levels of substitution (30, 50 and 70%) of Tifton hay with forage cactus (Nopalea cochenillifera). The animals were slaughtered when they reached 32 kg (± 1 kg) of body weight or 90 days. The experimental design was a 3x2 factorial arrangement, forage cactus (30, 50, 70%) x water (with or without water) plus a control group (n=6). Variables were analyzed using Tukey and Dunnett's test at 5% with PROC GLM in SAS software. Voluntary water intake and dry matter intake (DMI) decreased with the inclusion of forage cactus; however, preformed water intake and total water intake increased with the inclusion of forage cactus. Water restriction and its interaction with the treatments had no effect on animal performance. Daily weight gain was higher for the diets with 30 and 50%forage cactus inclusion, at 174 and 155 g, respectively, compared with 90 g for the control diet. Cactus, therefore, can be used as a food supplement and water resource.


2016 ◽  
Vol 115 (4) ◽  
pp. 567-575 ◽  
Author(s):  
Sang In Lee ◽  
Hyun Soo Kim ◽  
Jin Mo Koo ◽  
In Ho Kim

AbstractA total of forty weaned pigs ((Landrace×Yorkshire)×Duroc) were used to evaluate the effects of Lactobacillus acidophilus on inflammatory activity after lipopolysaccharide (LPS) challenge. Experimental treatments were as follows: (T1) control diet+saline challenge; (T2) control diet with 0·1 % L. acidophilus+saline challenge; (T3) control diet+LPS challenge; and (T4) control diet with 0·1 % L. acidophilus+LPS challenge. On d-14, piglets were challenged with saline (T1 and T2) or LPS (T3 and T4). Blood samples were obtained at 0, 2, 4, 6 and 12 h after being challenged and analysed for immune cell cytokine production and gene expression pattern. The L. acidophilus treatment increased the average daily weight gain (ADWG) and average daily feed intake (ADFI) compared with the control diet. With the control diet, the LPS challenge (T3) increased the number of immune cells and expression of TNF-α and IL-6 compared with the saline challenge (T1). Whereas with the saline challenge L. acidophilus treatment (T2) increased the number of leucocytes and CD4 compared with the control diet (T1), with the LPS challenge L. acidophilus treatment (T4) decreased the number of leucocytes, lymphocytes, CD4+ and CD8+ and expression of TNF-α and IL-6 compared with the control diet (T3). L. acidophilus treatment decreased the expression of TRL4 and NF-κB in peripheral blood mononuclear cells (PBMC) after LPS challenge, which leads to inhibition of TNF-α, IFN-γ, IL-6, IL-8 and IL1B1 and to induction of IL-4 and IL-10. We suggested that L. acidophilus improved ADWG and ADFI and protected against LPS-induced inflammatory responses by regulating TLR4 and NF-κB expression in porcine PBMC.


2016 ◽  
Vol 46 (6) ◽  
pp. 1107-1112
Author(s):  
Cinthia Maria Carlos Pereira ◽  
Juarez Lopes Donzele ◽  
Rita Flávia Miranda de Oliveira Donzele ◽  
Charles Kiefer ◽  
Verônica Maria Pereira Bernardino ◽  
...  

ABSTRACT: To evaluate inclusion levels and residual effects of diets containing yeast extract (YE) plus blood plasma (BP) on the performance of 36 to 60-days old piglets, 105 piglets were used (8.75±0.72kg), and they were distributed under a randomized block experimental design with five treatments (control - 2.0% BP; 1.0% BP plus 0.0, 1.0, 2.0, or 3.0% YE), seven repetitions, and three animals per experimental unit. Piglets were given experimental diets from 36 to 49 days of age. From 50 to 60 day of age, all piglets received the same diet. No effects from treatments (P>0.10) were observed on the performance variables from 36 to 49 day of age. From 50 to 60 day of age, an effect was observed from YE levels on the daily feed consumption (P<0.03), daily weight gain (p<0.01), and final weight (P<0.06), which increased quadratically up to 1.67, 1.67, and 1.55% YE levels, respectively. Piglets which were fed with the diet containing 1.0% BP + 2.0% YE were observed to have better feed conversion ratios (P<0.01) as compared to the control diet (2.0% BP). As it provides a better residual effect, the inclusion of 1.67% yeast extract may replace 50% of blood plasma in 36 to 49-days old piglet diets.


2018 ◽  
Vol 50 (1) ◽  
pp. 162-172 ◽  
Author(s):  
Luis D. Jiménez‐Martínez ◽  
Carlos A. Álvarez‐González ◽  
Erick De la Cruz‐Hernández ◽  
Dariel Tovar‐Ramírez ◽  
Mario A. Galaviz ◽  
...  

2003 ◽  
Vol 285 (5) ◽  
pp. G1004-G1013 ◽  
Author(s):  
Zhi Zhong ◽  
Matthias Froh ◽  
Mark Lehnert ◽  
Robert Schoonhoven ◽  
Liu Yang ◽  
...  

Accumulation of hydrophobic bile acids during cholestasis leads to generation of oxygen free radicals in the liver. Accordingly, this study investigated whether polyphenols from green tea Camellia sinenesis, which are potent free radical scavengers, decrease hepatic injury caused by experimental cholestasis. Rats were fed a standard chow or a diet containing 0.1% polyphenolic extracts from C. sinenesis starting 3 days before bile duct ligation. After bile duct ligation, serum alanine transaminase increased to 760 U/l after 1 day in rats fed a control diet. Focal necrosis and bile duct proliferation were also observed after 1–2 days, and fibrosis developed 2–3 wk after bile duct ligation. Additionally, procollagen-α1(I) mRNA increased 30-fold 3 wk after bile duct ligation, accompanied by increased expression of α-smooth muscle actin and transforming growth factor-β and the accumulation of 4-hydroxynenonal, an end product of lipid peroxidation. Polyphenol feeding blocked or blunted all of these bile duct ligation-dependent changes by 45–73%. Together, the results indicate that cholestasis due to bile duct ligation causes liver injury by mechanisms involving oxidative stress. Polyphenols from C. sinenesis scavenge oxygen radicals and prevent activation of stellate cells, thereby minimizing liver fibrosis.


Author(s):  
R. Guerrero-Zárate ◽  
C. A. Alvarez-González ◽  
M. A. Olvera-Novoa ◽  
N. Perales-García ◽  
C. A. Frías-Quintana ◽  
...  

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