The effects of acidilactici as a probiotic on growth performance and survival rate of great sturgeon, Huso huso (Linnaeus, 1758)

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Authors Zare, A.; Azari-Takami, G.; Taridashti, F.; Khara, H.

Download date 02/10/2021 06:14:21

Link to Item http://hdl.handle.net/1834/37754 Iranian Journal of Fisheries Sciences 16(1) 150-161 2017 The effects of as a probiotic on growth performance and survival rate of great sturgeon, Huso huso (Linnaeus, 1758)

Zare A.1; Azari-Takami G.2; Taridashti F.3*; Khara H.1

Received: August 2015 Accepted: July 2016

Abstract This study was accomplished to investigate the effect of Artemia urmiana nauplii enriched with Pediococcus acidilactici as probiotic on growth performance and survival rate of great sturgeon, Huso huso. Artemia nauplii were enriched with P. acidilactici at a final concentration of 1010 CFU mL-1 in three time dependent treatments as 3 h (T3), 6 h (T6), 9 h (T9), and one non-enriched Artemia as the control treatment. All treatments were considered in triplicates. Since the nauplii enriched for 9 hours (T9) had the most significant CFU/g compared to other treatments (p<0.05), juvenile beluga at the stage of first feeding with the mean body weight of 48 ± 1 mg (mean ± SE) were fed with nauplii enriched for 9 hours (T9) and the control diet, with three tanks assigned to each diet. No significant differences were observed in final weight, final length, condition factor, specific growth rate, average daily growth, and survival rate for fish fed with T9 compared to those in the control group (p>0.05). On the other hand, a decreasing trend was recorded in food conversion ratio (FCR) and final biomass changed significantly for T9 in comparison with that recorded in the control group (p<0.05). The results indicated that P. acidilactici had a positive effect on growth and survival of beluga larvae, and a different time of enrichment had a significant effect on LAB effect. The best time of enrichment for beluga larvae was found to be 9 hours.

Keywords: Artemia nauplii, Enrichment, Probiotic, Lactic acid , Huso huso

1- Department of Fishery, Faculty of Natural Resources, Lahijan Branch, Islamic Azad University, Lahijan, Iran. 2-Department of Animal Breeding and Nutrition, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran 3-Department of Fishery, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Guilan, Iran *Corresponding author’s Email: [email protected] 151 Zare et al., The effects of Pediococcus acidilactici as a probiotic on growth performance and …

Introduction Probiotics, particularly as food Great sturgeon, Huso huso is one of the formulations, are widely used to most important species of sturgeon in develop sustainable aquaculture the Caspian Sea. It inhabits in the practices (Verschurere et al., 2000; Caspian Sea, Black Sea, and Sea of Venkat et al., 2004; Wang, 2005; Saad, Azov (Razavi, 1988). It is considered as 2009). It has positive effects on fish an endangered species by the survival (Villamli et al., 2003), and International Union for Conservation of increases growth rate by enhancing Nature and Natural resources (Sturgeon food absorption (Fuller, 1992). Specialist Group, 1996) due to over Artemia nauplii as one of the most fishing and destruction of habitat, important live feeds for commercial which is the subject of restoration and production of larvae fish, is used restocking schemes (Williot et al., extensively in marine and freshwater 2001; Mohseni et al., 2008). One of the aquaculture (Jalali et al., 2009). major problems with restocking is the Considering the nonselective and low rate of larval survival (Suboski and continuous feeding of Artemia, it feeds Templeton, 1989). The use of from a variety of food particles nonspecific immuno-stimulants (Seenivasan et al., 2012). Therefore, it (Anderson, 1992; Figueras et al., 1997) has been used as a live feed and a and bacterial probiotics such as lactic multipurpose vector for the delivery of acid bacteria (Gatesoupe, 1991, 1994, different materials in aquaculture such 1999; Ringø and Gatesoupe, 1998; as essential nutrients (Watanabe et al., Verschuere et al., 2000) as well as 1983), antimicrobial agents (Dixon et several approaches such as improving al., 1995), vaccines (Campbell et al., husbandry nutrition (Reitan et al., 1993; 1993), and probiotics (Gatesoupe, Roennestad et al., 1999), water quality 1994). The enrichment of Artemia (Vadstein et al., 1993; Skjermo et al., nauplii with probiotic bacteria is 1997), disinfecting of fish eggs associated with positive effects on the (Salvesen and Vadstein, 1995), and UV host organism by improving properties treatment (Munro et al., 1999) have of the native microflora (Patra and been recommended to increase larval Mohamed, 2003), the efficacy of which survival. strongly depends on the status of Probiotics are defined as non- bacteria, time of exposure, and the type digestible food supplements (Gibson, of bacteria used (Gatesoupe, 1991, 2004) which have a beneficial effect on 1993). In fish, the the host physiology by modulating the (LAB) were described as part of the mucosal and systemic immunity, and normal microflora (Ringø and improving the balance of intestinal Gatesoupe, 1998; Robertson et al., micro flora by preventing the 2000). It has been reported to improve colonization of undesirable bacteria in water quality, fish growth, and survival the intestinal tract (Naidu et al., 1999). which in turn ultimately increases Iranian Journal of Fisheries Sciences 16(1) 2017 152 aquaculture output (Gatesoupe, 1994; rate of 100 naupli per mL. Three Shiri Hanceville et al., 1998; Skjermo different Artemia enrichment treatments and Vadstein, 1999; Verschurere et al., in a time dependant manner cultured for 2000; Planas et al., 2004), and in some 3h (T3), 6h (T6), and 9h (T9), and one cases inhibits the growth of pathogenic control treatment (non-enriched bacteria (Gildberg et al., 1995). Artemia) were considered in triplicates. Probiotics effectively improve the Nauplii were fed with P. acidilactici at survival, growth, and immunity of host a final concentration of 1010 CFU mL-1 organism, therefore, the present study with aeration at 15ºC. was carried out to investigate the effects of enrichment of Artemia urmiana with Sample processing P. acidilactici on growth and survival After 3 h enrichment, 10 mL was of beluga larvae. sampled from each replicate of control and T3 to determine bacterial load, and Material and methods transferred into sterilized experiment Probiotic tubes for bacteriological sampling. This The dried powder of Bactocell procedure was repeated for T6 and T9 (Lallemand Co., Montreal, Canada) was after 6h and 9h enrichment, used as probiotic. It is a food additive respectively. which contains 1010 spores of Samples were passed over a sterile Pediococcous acidilactici. 100-µm mesh to separate Artemia from culture water. Trapped Artemia in the Artemia nauplii filter were rinsed with sterile saline Artemia urmiana (Urmia Lake, Iran) water (35ppt), and homogenized in 5 cysts were decapsulated prior to mL sterile saline water. Samples were hatching in sodium hypochloride (Hoff serially diluted then 100 µm of each and Snell, 1987). Cysts were allowed to dilution was spread plated on tryptone hatch in a conical tank (40 L volume) soy agar (TSA) and de Man, Rogosa containing seawater at a salinity of and Sharpe (MRS) agar (Liofilchem) 33ppt for 24h, at 28ºC under strong for total viable bacteria count and LAB, illumination (2000 Lux) and heavy respectively. Plates were incubated at aeration. Freshly hatched nauplii were 30ºC for 48- 72h. After that, the number reared for 24h up to instar-II stage. The of bacteria were counted as colony- instar-II Artemia were harvested by forming unit (CFU) per nauplii for each exploiting the positive photoperiod replicate. behavior of nauplii. Fish culture and feeding trial Enrichment treatment One thousand and two hundred beluga Instar-II Artemia nauplii were larvae hatched at the Shahid Beheshti transferred into glass containers with a Sturgeon Fish Propagation and Rearing water volume of 500mL and stocked at Complex in Rasht, Guilan, Iran, were 153 Zare et al., The effects of Pediococcus acidilactici as a probiotic on growth performance and … used for this study. They were at the FCR= FO/ WG (g) stage of first feeding with the mean CF= fish weight (g)/ (fish length cm)3 × body weight and total length of 48±1 100 mg (mean ± SE), and 18.5 ± 0.1 mm, ADG= (W2- W1)/ (W1- T) × 100 respectively. Water temperature, pH, PBWI= 100 (BW2- BW1)/ BW1 and dissolved oxygen were maintained Where: º at 8- 10 C, 7.5- 8, and 6- 8 mg/L, ln= natural log, W1= initial weight (g), respectively throughout the trial. Water W2= final weight (g), T= time period in flow was continuous and the outlet was days, FO= feed offered (g), WG= at the center of each tank. Fish were weight gain, BW1= initial biomass randomly distributed into 6 plastic tanks weight, and BW2= final biomass with a water volume of 45 L at the weight. Survival rate was calculated at density of 200 fish per tank. Since the end of the experiment: survival=

Artemia nauplii enriched for 9h (T9) (Nf/N0) × 100; where N0 is initial had the most significant CFU/g number of fish and Nf is final number compared to other treatments (p<0.05), of fish. it was fed to beluga larvae. Fish in the Fifteen fish in each treatment were control group were fed with non- taken for intestinal microbiota analysis. enriched Artemia. Each feeding group Fish were fasted for 24h before the was run in triplicates. Juveniles were microbiological sampling. To open the fed at 30% of body weight per day at ventral surface of fish, they were killed various times including 4:00, 8:00, by brain physical destruction, and the 12:00, 16:00, 20:00, 24:00 hours. The skin was washed with 0.1% unfed Artemia nauplii were collected benzalkonium chloride. To isolate the after the respective hours of feeding. autochthonous intestinal The experiment was carried out for 11 microbiological communities, the entire days. intestinal tract was removed aseptically, washed thoroughly with sterile saline Sample collection and analyses water and homogenized (Potter– At the end of experiment, on the 11th Elvehjem Tissue Homogenizer, Cole- day, 25 fish were randomly removed Parmer Instrument Company, IL, USA). from each tank to assess the growth Then, it was serially diluted to 10-7 with performance including specific growth sterile saline. Samples were spread in rate (SGR), food conversion ratio triplicate onto tryptone soy agar (TSA) (FCR), condition factor (CF), average and de Man, Rogosa and Sharpe (MRS) daily growth (ADG), and percent body agar (Liofilchem), for total viable weight increase (PBWI) which were bacteria count and LAB, respectively. calculated according to the following Plates were incubated at room formulae: temperature at 25ºC for 5 days

WG= W2- W1 (Mahious et al., 2006) and colony-

SGR= 100 (ln W2- lnW1)/ T forming units (CFU/g) were calculated Iranian Journal of Fisheries Sciences 16(1) 2017 154 from statistically viable plates (i.e. group, while nauplii enriched for 1 and plates containing 30–300 colonies) 6 hours had no significant differences (Rawling et al., 2009). (Fig. 1).

Statistical analysis Growth performance and feed Data are presented as means±standard utilization parameters error (SE). To evaluate normality of Growth performance and feed data and homogeneity of variances, one utilization parameters of beluga larvae Sample Kolmogorov-Smirnov and fed with nauplii enriched for 9 hours Levene's test were used, respectively. and non-enriched nauplii at the end of One-way analysis of variance trial are presented in Table 1. There are (ANOVA) was applied to compare the no significant differences in final total viable bacteria in Artemia nauplii weight, final length, CF, SGR, ADG, between all treatments. When survival rate for fish fed with T9 significant differences were observed, compared to that in the control group Duncan’s multiple range tests were (p>0.05). On the other hand, a performed. Independent Samples Test decreasing trend was observed in FCR was used to determine differences and final biomass changed significantly between treatments in intestinal for T9 in comparison with the control microbiota analysis and growth group (p<0.05). performance. The significance level of 0.05 was considered for data analyzes. Bacteriological study LAB levels in digestive tract of fish fed Results with T9 were significantly elevated Enrichment experiment (p<0.05) (Fig. 2) compared to the The LAB levels in all experimental control group. While, no significant treatments are presented in Fig. 1. As it differences was observed in total is illustrated in figure1, there are bacterial load between digestive tract of significant differences among nauplii fish fed with control and T9 (p>0.05) treatments enriched by the (Fig. 2). concentration of 1010 CFU mL-1 compared to control group (p<0.05). On the other hand, while the time of enrichment increased, the LAB levels increased, and the highest LAB level was observed in nauplii enriched for 9 h. The mean total bacterial load has changed significantly among experimental treatments (p<0.05). Only those enriched for 9 hours indicated significant difference with the control 155 Zare et al., The effects of Pediococcus acidilactici as a probiotic on growth performance and …

Figure 1: LAB levels (MRS agar) and total bacterial load (TSA agar) in Aretemia nauplii enriched for 3 hours (T3), 6 hours (T6), and 9 hours (T9) and control in trial 1. Small letters show significant difference in each treatment during time by Duncan's test (p<0.05). Values are mean±SE.

Table 1: Growth performance and feed utilization parameters of beluga larvae, Huso huso fed with Artemia nauplii enriched for 9 hours (T9) and control in trial 2. Growth performance and feed utilization parameters T9 Control Initial weight (g) 0.048 ± 1 0.048 ± 2 Final weight (g) 0.11 ± 2 0.95 ± 3 Initial length (cm) 1.85 ± 0.05 1.85 ± 0.05 Final length (cm) 2.3 ± 0.0 2.1 ± 0.0 Percent body weight increase (PBWI) (%) 125.15 ± 0.21 97.72 ± 2.14 Condition factor (CF) 0.8 ± 0.01 0.94 ± 0.03 Food conversion ratio (FCR) 3.03 ± 0.12 7.31 ± 1.13 SGR (% /day) 3.92 ± 0.13 2.62 ± 0.18 ADG (%) 4 ± 0.01 3 ± 0.01 Survival (%) 83.33 ± 4.16 58.33 ± 4.17

Figure 2: LAB levels (MRS agar) and total bacterial load (TSA agar) in Aretemia nauplii enriched for 9 hours (T9) and control in trial 2. Values are mean ± SE, n= 15 per each treatment. Iranian Journal of Fisheries Sciences 16(1) 2017 156

Discussion been found in many species including Since probiotics have the ability to Indian carp, Labeo rohita, freshwater control potential pathogens, and shrimp, Macrobrachium rosenbergii, increase the growth rates and welfare of common carp, Cyprinus carpio, turbot, farmed aquatic animals, which has been Scopthlmus maxinus, Persian Sturgeon, demonstrated by several studies Acipenser persicus, and Zander, Sander (Carnevali et al., 2004; Macey and lucioperca(Gatesoupe, 1991; Bogut et Coyne, 2005); this study was carried al., 1998; Gosh et al., 2003; Faramarzi out to examine the ability of Artemia et al., 2011; Seenivasan et al., 2012; nauplii enriched with P. acidilactici on Faeed et al., 2016). Generally, LAB are the growth and survival of beluga capable of attaching themselves to the larvae. In our study Artemia nauplii epithelium and establish their colony enriched for 9 hours had the most there (Seenivasan et al., 2012), and by significant LAB level, this treatment releasing the external enzyme they can was selected in order to transfer the cause better digestion and growth maximum rate of P. acidilactici to (Ghosh et al., 2002). Therefore, intestine of beluga larvae for increased growth performance and enhancement of growth performance. observation of a decreasing trend of The previous study on great sturgeon FCR in beluga larvae fed with T9 may larvae has shown that Artemia nauplii be due to the administration of enriched for 9 hours has the highest significant changes in the population of level of LAB (Azar-Takami et al., gut micro flora, in which significant 2013). elevations in establishment of colonies Manipulation of bacterial load of LAB were recorded in the intestine present in rotifers and Artemia for fish of beluga larvae fed with T9. This feeding may constitute a valuable indicates that P. acidilactici could mechanism to increase survival rates eliminate harmful bacteria in the and larval growth (Gatesoupe, 1994; intestine of beluga or the colonization Noh et al., 1994; Robertson et al., of P. acidilactici may be dominant over 2000). Probiotic supplementation has harmful bacteria by their large extensively been used in aquaculture presence, which saturates the adhesion species (Suralikar and Sahu, 2001; receptors and prevents the pathogenic Lara-Flores et al., 2003; Ziaei-Nejad et bacteria from attachment and al., 2006; Shinde et al., 2008; Didinen colonization (Vine et al., 2004; Venkat et al., 2016). In the present study, et al., 2004). although there was no significant In conclusion, P. acidilactici had a difference in growth performance, an positive effect on the growth and increasing trend was observed for fish survival of beluga larvae. Considering fed with enriched Artemia compared to the adhesion potency of P. acidilactici the control group, and FCR decreased to Artemia nauplii, enhancement of significantly. The same results have growth performance, reduction in FCR, 157 Zare et al., The effects of Pediococcus acidilactici as a probiotic on growth performance and … and increase in number of beneficial Campbell, R., Adams, A., Tatner, bacteria, the best time of enrichment for M.F., Chair, M. and Sorgeloos, P., beluga larvae was 9 hours. Although 1993. Uptake of Vibrio anguillarum much work is needed on research in vaccine by Artemia salina as a probiotics for aquaculture at an early potential oral delivery system to fish stage of development, the available fry. Fish & Shellfish Immunology 3, information is inconclusive (Gomez-Gil 451-459. et al., 2000). 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