Presumptive probiotic isolated from Oncorhynchus mykiss (Walbaum, 1792), cultivated in Mexico

2020-07-12T00:40:30Z http://www.journal-aquaticscience.com/?_action=export&rf=summon&issue=9115

2018-01-01

Int. J. of Aquatic Science 2018 9 1 Presumptive probiotic isolated from Oncorhynchus mykiss (Walbaum, 1792), cultivated in Mexico José Alberto Ramírez-Torrez María del Carmen Monroy-Dosta Luis Héctor Hernández-Hernández Jorge Castro-Mejía Jaime Amadeo Bustos-Martínez Aida Hamdan-Partida The intestinal microbial community of fish is determining by biotic and abiotic factors, and depending on the niche they occupy, we can distinguish between transient and permanent microorganisms. The last ones, are important for aquaculture, due to its probiotic potential. Three adult of Oncorhynchusmykiss were used to extract their intestine to isolate the bacteria present and tested to determine probiotic ability: resistance to acidic pH and bile, adhesion, hemolytic activity, antibiotic susceptibility, and in vitro antagonism. Bacteria groups were identified by sequencing the 16S rRNA. Fourteen bacterial strains were obtained, of which the strains Bacillus pumilus, Shewanella xiamenensis, Bacillus sp. and Bacillus methylotrophicus were able to grow at acidic pH in the presence of bile and only S. xiamenensis showed α-hemolytic activity. B. pumilus and Bacillus sp. had better adhesion and antagonism in vitro. We can conclude that B. pumilus and Bacillus sp. presented potential probiotics in vitro and is recommendable to evaluate them in rainbow trout to determine what benefits they can offer to this fish. Oncorhynchus mykiss Bacillus spp probiotics 2018 01 01 3 12 http://www.journal-aquaticscience.com/article_70723_dd1d5f447b883403d9146df626179d6a.pdf

2018-01-01

Int. J. of Aquatic Science 2018 9 1 Response of benthic macroinvertebrates communities to seasonal changes in the Grand-Lahou lagoon (Côte d’Ivoire, West Africa) Kouakou Norbert Kouadio Adama Idrissa Camara Netto Mireille Seu-Anoï Dramane Diomande Germain Gourene The response of benthic macroinvertebrates communities to seasonal changes was studied in the Grand-Lahou lagoon (Côte d’Ivoire, West Africa). The organisation of macroinvertebrates was recorded at eight (8) stations across the whole lagoon in four seasons (the Long Rainy Season (June 2006), the Short Dry Season (September 2006), the Short Rainy Season (November 2006) and the Long Dry Season (March 2007)).Each faunal sampling was coupled with in situ measurements of abiotic parameters and samples were also collected for granulometry analyses. A total of 1 747 individuals representing 54 taxa belonging to 27 families and 7 orders of benthic macroinvertebrates were identified during this study. Of this number of taxa, molluscs constituted 37.03%, crustaceans 35.18% and polychaetes 24.07%. Other taxa recorded included oligochaetes and undetermined, together constituted 3.7%. The distribution patterns of density and diversity over seasons in the Grand-Lahou lagoon indicated periodic changes ranging from rich community during the Long Rainy Season to impoverished one in the Long Dry Season. However, these variations were not significantly different.Temperature, dissolved oxygen, pH, water depth and percentage of fine and coarse sand in that order were the major significant variables structuring the macroinvertebrates assemblages in the Grand-Lahou lagoon. Benthic macroinvertebrates Seasonal changes Grand-Lahou lagoon Côte d’Ivoire 2018 01 01 13 22 http://www.journal-aquaticscience.com/article_70719_07a0387a1d98f50c1a575c45370485bf.pdf

2018-01-01

Int. J. of Aquatic Science 2018 9 1 Population and age structure of the goby Stigmatogobius pleurostigma (Perciformes: Gobiidae) from the Mekong Delta Quang Minh Dinh Nguyen Phuong Dai Nguyen The response of benthic macroinvertebrates communities to seasonal changes was studied in the Grand-Lahou lagoon (Côte d’Ivoire, West Africa). The organisation of macroinvertebrates was recorded at eight (8) stations across the whole lagoon in four seasons (the Long Rainy Season (June 2006), the Short Dry Season (September 2006), the Short Rainy Season (November 2006) and the Long Dry Season (March 2007)).Each faunal sampling was coupled with in situ measurements of abiotic parameters and samples were also collected for granulometry analyses. A total of 1 747 individuals representing 54 taxa belonging to 27 families and 7 orders of benthic macroinvertebrates were identified during this study. Of this number of taxa, molluscs constituted 37.03%, crustaceans 35.18% and polychaetes 24.07%. Other taxa recorded included oligochaetes and undetermined, together constituted 3.7%. The distribution patterns of density and diversity over seasons in the Grand-Lahou lagoon indicated periodic changes ranging from rich community during the Long Rainy Season to impoverished one in the Long Dry Season. However, these variations were not significantly different.Temperature, dissolved oxygen, pH, water depth and percentage of fine and coarse sand in that order were the major significant variables structuring the macroinvertebrates assemblages in the Grand-Lahou lagoon. Stigmatogobius pleurostigma mortality growth exploitation rate age 2018 01 01 23 29 http://www.journal-aquaticscience.com/article_70720_f27ac1c146df642f7acf7404032c9d1e.pdf

2018-01-01

Int. J. of Aquatic Science 2018 9 1 Qualitative and Quantitative study of Epipelion algal community in Euphrates River (Al-Hussainya), Karbala Province-Iraq Jasim M. Salman Fikrat M. Hassan Sara H. Abdulameer A seasonal study of Epipelion algal community (epipelic algae) was conducted in Euphrates River (Al-Hussainya) for the period from October 2012 to September 2013. A total of 203 taxa of Epiplion algae were identified which belonging to five classes of algae. The algal community dominated by Bacillariophyceae was (79.3%) followed by Cyanophyceae (10.84%) and Chlorophyceae (6.9%). Euglenophyceae and Dinophyceae were constituted 1.48% of the total number. The total number of Epipelic algal cells ranged from 9924.5 x 104 cell/cm2 in the autumn to 10.02 x 104 cell/cm2 in the summer. Some genera of algae were dominated during this study in the term of number of species, these genera include Nitzsche, Navicula, Cymbella, Fragilaria and Oscillatoria. These algae might be indicated that the river under the impact of organic pollution. Euphrates River Al- Hussainya River Benthic algae Epipelion algae Karbala Iraq 2018 01 01 30 37 http://www.journal-aquaticscience.com/article_70727_07f1735e4d89759856ecea4444eeb3dc.pdf

2018-01-01

Int. J. of Aquatic Science 2018 9 1 Semen evaluation in Chirostoma jordani (Woolman, 1894) and Chirostoma humboldtianum (Valenciennes, 1835), Mexican native species (Atheriniformes: Atherinopsidae) Jesús Dámaso Bustamante González Araceli Cortés García Alejandro Ávalos Rodríguez Gerardo Figueroa Lucero Edith Arenas Ríos Martha Rodríguez Gutiérrez The knowledge of the reproductive physiology of fish of commercial interest is fundamental to optimize reproduction in wildlife or in captivity, so this research aims to determine and compare the seminal quality of Chirostoma jordani and Chirostoma humboldtianum. A sample of 20 specimens of each species from the state of Tlaxcala and Mexico City were obtained, respectively, from which the semen was obtained by slightly pressing the abdominal region in the operculum-caudal direction, collected with a micropipette of 100 μL and placed in microcentrifuge tubes. According to the results, the mean volume of semen was 2.73 ± 1.0 μL for C. jordani and 2.47 ± 1.8 μL in C. humboldtianum, while the mean sperm concentration was 9.24 ± 4.32 x 106 spermatozoa mL-1 and 15.58 ± 13.81 x 106 spermatozoa μL-1 respectively, with 95.10 ± 4.90 % and 92.10 ± 1.89 % of live cells respectively, and average motility of 437.85 ± 90.37 s and 549.40 ± 31.80 s respectively. Finding significant differences in the motility time between both species. Information that contributes to the knowledge of the reproductive biology of C. jordani and C. humboldtianum to improve their reproduction in captivity or wildlife. Seminal volume sperm concentration sperm viability sperm motility atherinopsidae 2018 01 01 38 43 http://www.journal-aquaticscience.com/article_70721_79a0f1c8205895c8c0899f8487c9ba85.pdf

2018-01-01

Int. J. of Aquatic Science 2018 9 1 Nutrient removal from municipal wastewater using mixture of two algae, Scenedesmus obliquus and Chlorella vulgaris Mohammad Hadi Abolhasani Niloofar Pirestani Alireza Nehbandani Behzad Sanatinia Algae are the main components of primary production in sea and refinery wastewater. Microalgae and cyanobacteria are the most-used groups. In the present study, refined wastewater was collected from drainage of a refinery in Gorgan to evaluate efficiency of two algae mixture, Scenedesmus obliquus and Chlorella vulgaris, to remove water nitrate, phosphate, BOD and COD during 14 days. An equal number of either of the algae (24000 cells) was added to each treatment at the experiment initiation. The algae number were daily counted; whereas, the media nitrate, phosphate, ammonia, chlorophyll-a, biomass, BOD and COD were measured every other day. At the end of study, phosphate was completely depleted in M50 treatment and the highest phosphate level (1 mg/l) was observed in M0 treatment (p <0.05). Water nitrate was completely depleted in M50 treatment. The highest biomass levels (0.4 g/l) were observed in M0 and M50 treatments (p <0.05). The highest chlorophyll-a was observed in M0 treatment (2.83 mg/l). BOD and COD had similar pattern among the treatments. The lowest COD was related to M50 treatment (5 mg/l); whereas the lowest BOD level was observed in M0 treatment (0.05 mg/l). Overall, the algae mixture was efficient to uptake nutrients and produce biomass and chlorophyll. nutrient removal algae mixture Scenedesmus obliquus Chlorella vulgaris 2018 01 01 44 50 http://www.journal-aquaticscience.com/article_70724_745f3f5db9a8747b12f0314cfa43b319.pdf

2018-01-01

Int. J. of Aquatic Science 2018 9 1 Effect of experimental diets on the activities of intestinal digestive enzymes of Grass carp, (Ctenopharyngodon idella) and Silver carp (Hypophthylmichthys molitrix) Sadar Aslam Amina Zuberi Ahmad Shoaib A ninety days feeding experiment was directed to compare the effect of Duckweed (Lemna minor) and soybean, Glycine max (L) meals as a source of protein on the actions of intestinal digestive enzymes of Chinese carps; Grass carp, Ctenopharyngodon idella (Valenciennes, 1844) and Silver carp, Hypophthylmichthys molitrix (Valenciennes, 1844) fingerlings reared in monoculture and polyculture system. Two 35 % protein experimental diets, FSBM (feed containing 21 % soybean meal) and FDW (feed having 21 % duckweed) as a source of protein were prepared and fed for twelve weeks. At the end of trial, the experimental diets showed a significant effect on the activities of intestinal digestive enzymes. There is significant (P<0.001) difference in the intestinal cellulase, protease and amylase enzymes in both Chinese carps. In culture systems, intestinal protease and amylase activities of fingerlings of C. idella fed FDW diets were significantly higher as compared to fish fed FSBM diet. In polyculture system, the intestinal amylase activity of H. molitrix fingerlings was significantly higher when fish offered FDW diet as compared to FSBM diet.The results of this study indicate the usage of L. minor as a protein source in polyculture system enhances the fish digestive capacity than monoculture system. Chinese carps Digestive enzymes Glycine max Lemna minor 2018 01 01 51 57 http://www.journal-aquaticscience.com/article_70725_a4c35b54ea1b3b5ba90a10b16a0af3d9.pdf

2018-01-01

Int. J. of Aquatic Science 2018 9 1 Seminal quality in rainbow trout (Oncorhynchus mykiss Walbaum, 1792) with respect to weight Araceli Cortes García Jesús Dámaso Bustamante González Martha Rodríguez Gutiérrez In aquaculture farms, growth is an essential factor in assessing the yield of inputs, welfare of organisms and accelerating sexual maturity; the objective of the investigation was to determine seminal quality with respect to weight: one, two, three and four kilograms. Ninety-four males were anesthetized with clover essence at a concentration of 0.05 mL L-1 of water. The semen was extracted by light abdominal pressure in the operculum-caudal direction. The sperm concentration was determined with Neubauer chamber, viability with eosin-nigrosin, estimated in percentage and motility was evaluated by activating with water. The results indicate that increasing the weight increases the volume. In the one kilogram males the mean volume was 8.0 ± 3.9 mL, in those of two 11.1 ± 6.1 mL, in those of three 12.3 ± 8.3 mL and in those of four 29.2 ± 21.8 mL. On the other hand, the sperm concentration mL-1 showed an inverse tendency to the volume being the two kilograms males who showed the highest concentration 6.80 ± 0.55 x 109 spermatozoa mL-1; the highest percentage of viability 94.19 ± 1.42 % was obtained in males of two kilograms and the best motility with 86.00 ± 4.14 s in those of three kilograms. The variables presented differences (P ˂ 0.05) in relation to the weight. Considering the variables of the study, it is proposed to use two kilograms organisms to ensure fertilization, which will reduce operating costs. Semen production sperm concentration sperm viability sperm motility 2018 01 01 58 62 http://www.journal-aquaticscience.com/article_70722_b7100a7ad8d135228b1c5641a98663f2.pdf