Pub Date : 2021-12-09DOI: 10.1080/10454438.2021.2011527
P. K. Patil, T. Vinay, R. Aravind, S. Avunje, K. K. Vijayan
ABSTRACT To study the effects of the probiotics on the gut microbial community of Penaeus indicus larvae, a combination of three probiotics—Bacillus subtilis, B. lichiniformis, and B. pumilus (5 × 1010 cfu/gram)—were added to the rearing environment of shrimp larvae (5,000/500 L). Altered microbial communities due to the application of probiotics were studied using 16S rRNA-based Illumina sequencing. The results suggest that the probiotics-treated group showed higher richness; the control group was even as measured by alpha diversity indices. The abundance of Proteobacteria was higher in the probiotic-treated group (94.85%) compared to the control (58.29%). At the genus level, the probiotics group was dominated by Vibrio (44.17%), Rhodobacteraceae_unclassified (25.22%), Catenococcus (12.89%), Pseudoalteromonas (4.76%), and Kordia (1.53%); Tenacibaculum (24.29%), Catenococcus (19.38%), Vibrio (7%), Gammaproteobacteria_unclassified (6.6%), Fluviicola (5.91%), and Chlamydiales_unclassified (4.61%) dominated in the control group. Results indicate that probiotic application influenced the taxonomic profile of gut microbes. This information helps us to understand the effect of probiotic application especially in penaeid shrimp hatcheries.
{"title":"Effect of Bacillus spp. on the composition of gut microbiota in early life stages of Indian white shrimp, Penaeus indicus","authors":"P. K. Patil, T. Vinay, R. Aravind, S. Avunje, K. K. Vijayan","doi":"10.1080/10454438.2021.2011527","DOIUrl":"https://doi.org/10.1080/10454438.2021.2011527","url":null,"abstract":"ABSTRACT To study the effects of the probiotics on the gut microbial community of Penaeus indicus larvae, a combination of three probiotics—Bacillus subtilis, B. lichiniformis, and B. pumilus (5 × 1010 cfu/gram)—were added to the rearing environment of shrimp larvae (5,000/500 L). Altered microbial communities due to the application of probiotics were studied using 16S rRNA-based Illumina sequencing. The results suggest that the probiotics-treated group showed higher richness; the control group was even as measured by alpha diversity indices. The abundance of Proteobacteria was higher in the probiotic-treated group (94.85%) compared to the control (58.29%). At the genus level, the probiotics group was dominated by Vibrio (44.17%), Rhodobacteraceae_unclassified (25.22%), Catenococcus (12.89%), Pseudoalteromonas (4.76%), and Kordia (1.53%); Tenacibaculum (24.29%), Catenococcus (19.38%), Vibrio (7%), Gammaproteobacteria_unclassified (6.6%), Fluviicola (5.91%), and Chlamydiales_unclassified (4.61%) dominated in the control group. Results indicate that probiotic application influenced the taxonomic profile of gut microbes. This information helps us to understand the effect of probiotic application especially in penaeid shrimp hatcheries.","PeriodicalId":15031,"journal":{"name":"Journal of Applied Aquaculture","volume":"35 1","pages":"622 - 632"},"PeriodicalIF":1.2,"publicationDate":"2021-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49433222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-05DOI: 10.1080/10454438.2021.2011528
S. Musa, C. Aura, T. Tomasson, Ó. Sigurgeirsson, H. Thorarensen
ABSTRACT We compared the benefits of using extruded feed (EF), against pelleted feed (PF) to guide cage culture investments in Great Lakes. Three out of six cages in the same farm had fish that were fed EF and the other half, belonging to a different farm had fish that were fed PF. The diets were similar in crude protein, lipid and energy content. However, the fiber content in PF was 4 times higher than that of EF. The fish fed on EF grew better (438.0 ± 7.4 g) than the fish fed on PF (220.8 ± 2.9 g). The cost of production for EF was about 26% lower than for PF, primarily because of better feed utilization. The load of P and N for PF diet was 59% and 29% higher, respectively, than when EF was used. Therefore, EF feed delivered better economic gains with lower environmental impact than PF feed.
{"title":"A comparative study of the effects of pelleted and extruded feed on growth, financial revenue and nutrient loading of Nile tilapia (Oreochromis niloticus L.) cage culture in a lacustrine environment","authors":"S. Musa, C. Aura, T. Tomasson, Ó. Sigurgeirsson, H. Thorarensen","doi":"10.1080/10454438.2021.2011528","DOIUrl":"https://doi.org/10.1080/10454438.2021.2011528","url":null,"abstract":"ABSTRACT We compared the benefits of using extruded feed (EF), against pelleted feed (PF) to guide cage culture investments in Great Lakes. Three out of six cages in the same farm had fish that were fed EF and the other half, belonging to a different farm had fish that were fed PF. The diets were similar in crude protein, lipid and energy content. However, the fiber content in PF was 4 times higher than that of EF. The fish fed on EF grew better (438.0 ± 7.4 g) than the fish fed on PF (220.8 ± 2.9 g). The cost of production for EF was about 26% lower than for PF, primarily because of better feed utilization. The load of P and N for PF diet was 59% and 29% higher, respectively, than when EF was used. Therefore, EF feed delivered better economic gains with lower environmental impact than PF feed.","PeriodicalId":15031,"journal":{"name":"Journal of Applied Aquaculture","volume":"35 1","pages":"633 - 655"},"PeriodicalIF":1.2,"publicationDate":"2021-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46821081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-06DOI: 10.1080/10454438.2021.2000920
S. Gericke, K. Salie, L. D. De Wet, N. Goosen
ABSTRACT The study aimed to investigate the impacts of dietary supplementation of endo-(1,4)-β-xylanase in high plant-ingredient diets in on-growing African catfish (Clarias gariepinus). A high plant-ingredient basal diet was supplemented with exogenous xylanase at 0 (Control diet), 100, 150, and 200 ppm, and fed to on-growing (initial weight ca 500 g) fish for a duration of 91 days. Growth parameters, fillet proximate composition, hindgut microbial diversity, hindgut short-chain fatty acid concentration, and blood chemistry parameters were monitored. There were no effects on growth parameters, fillet proximate composition, hindgut short-chain fatty acid concentration, and blood chemistry parameters. Dietary xylanase supplementation caused a significant shift in hindgut microbial diversity, where the 200 ppm treatment showed significantly lower Shannon diversity (2.15 ± 0.13) than the control (2.78 ± 0.21). The significantly lower microbial diversity indicates that enzyme supplementation selectively benefitted certain microbial populations in the hindgut, presumably through the release of prebiotic compounds during non-starch polysaccharide hydrolysis. It is concluded that dietary xylanase supplementation can significantly impact hindgut microbial communities in on-growing African catfish, and it is recommended that future work investigate whether dietary xylanase supplementation can benefit aquaculture production performance in younger fish.
{"title":"Effects of dietary supplementation of endo-(1,4)-β-xylanase in plant-based diets on growth performance, hindgut microbial diversity, and blood chemistry in large on-growing African catfish (Clarias gariepinus)","authors":"S. Gericke, K. Salie, L. D. De Wet, N. Goosen","doi":"10.1080/10454438.2021.2000920","DOIUrl":"https://doi.org/10.1080/10454438.2021.2000920","url":null,"abstract":"ABSTRACT The study aimed to investigate the impacts of dietary supplementation of endo-(1,4)-β-xylanase in high plant-ingredient diets in on-growing African catfish (Clarias gariepinus). A high plant-ingredient basal diet was supplemented with exogenous xylanase at 0 (Control diet), 100, 150, and 200 ppm, and fed to on-growing (initial weight ca 500 g) fish for a duration of 91 days. Growth parameters, fillet proximate composition, hindgut microbial diversity, hindgut short-chain fatty acid concentration, and blood chemistry parameters were monitored. There were no effects on growth parameters, fillet proximate composition, hindgut short-chain fatty acid concentration, and blood chemistry parameters. Dietary xylanase supplementation caused a significant shift in hindgut microbial diversity, where the 200 ppm treatment showed significantly lower Shannon diversity (2.15 ± 0.13) than the control (2.78 ± 0.21). The significantly lower microbial diversity indicates that enzyme supplementation selectively benefitted certain microbial populations in the hindgut, presumably through the release of prebiotic compounds during non-starch polysaccharide hydrolysis. It is concluded that dietary xylanase supplementation can significantly impact hindgut microbial communities in on-growing African catfish, and it is recommended that future work investigate whether dietary xylanase supplementation can benefit aquaculture production performance in younger fish.","PeriodicalId":15031,"journal":{"name":"Journal of Applied Aquaculture","volume":"35 1","pages":"561 - 584"},"PeriodicalIF":1.2,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42813987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-04DOI: 10.1080/10454438.2021.1999881
D. Le, Y. Chien
ABSTRACT Our study investigated the apparent digestibility coefficients (ADCs) of corn distiller’s dried grains with solubles (DDGS), dehulled lupine meal (DHLM) and de-fatted soybean meal (DSBM) for orange-spotted grouper Epinephelus coioides. The ADCcp of DHLM (97%) was the highest while the ADCcp of DDGS (90%) was similar to that of DSBM (89%). Digestible protein (DP) of DHLM (523 g kg−1) was significantly higher than that of DSBM (495 g kg−1) while DP of DDGS (457 g kg−1) was the lowest. We found no difference in digestible energy (DE) between DSBM (17.53 MJ kg−1) and DHLM (16.99 MJ kg−1) while DE of DDGS (15.77 MJ kg−1) was also the lowest. The relationship between fiber class and ADCs suggested that reducing fiber class in DHLM and DDGS should be helpful for the orange-spotted grouper’s digestibility.
摘要本试验研究了玉米酒糟干粒和可溶性物(DDGS)、去皮羽扇豆粕(DHLM)和去脂豆粕(DSBM)对橙斑石斑鱼的表观消化系数(adc)。DHLM的ADCcp最高(97%)，DDGS的ADCcp为90%，与DSBM的ADCcp相近(89%)。DHLM的可消化蛋白(DP)为523 g kg - 1，显著高于DSBM (495 g kg - 1)， DDGS的DP最低(457 g kg - 1)。DSBM与DHLM的消化能(DE)无显著差异(17.53 MJ kg−1)，DDGS的消化能(DE)最低(15.77 MJ kg−1)。纤维种类与adc之间的关系表明，降低DHLM和DDGS中的纤维种类有助于提高橙斑石斑鱼的消化率。
{"title":"Digestibility of dehulled lupine meal, corn distiller’s dried grain with solubles and de-fatted soybean meal for orange-spotted grouper Epinephelus coioides","authors":"D. Le, Y. Chien","doi":"10.1080/10454438.2021.1999881","DOIUrl":"https://doi.org/10.1080/10454438.2021.1999881","url":null,"abstract":"ABSTRACT Our study investigated the apparent digestibility coefficients (ADCs) of corn distiller’s dried grains with solubles (DDGS), dehulled lupine meal (DHLM) and de-fatted soybean meal (DSBM) for orange-spotted grouper Epinephelus coioides. The ADCcp of DHLM (97%) was the highest while the ADCcp of DDGS (90%) was similar to that of DSBM (89%). Digestible protein (DP) of DHLM (523 g kg−1) was significantly higher than that of DSBM (495 g kg−1) while DP of DDGS (457 g kg−1) was the lowest. We found no difference in digestible energy (DE) between DSBM (17.53 MJ kg−1) and DHLM (16.99 MJ kg−1) while DE of DDGS (15.77 MJ kg−1) was also the lowest. The relationship between fiber class and ADCs suggested that reducing fiber class in DHLM and DDGS should be helpful for the orange-spotted grouper’s digestibility.","PeriodicalId":15031,"journal":{"name":"Journal of Applied Aquaculture","volume":"35 1","pages":"543 - 560"},"PeriodicalIF":1.2,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43177420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-19DOI: 10.1080/10454438.2021.1985679
Guddu Kumar, J. Sharma, R. Goswami, A. Shrivastav, Dr. Neelesh Kumar, S. Chandra, R. Chakrabarti
ABSTRACT Snow trout, Schizothorax richardsonii (Gray, 1832), is an economically important fish in the Himalayan region. Snow trout fry (118.53 ± 5.42 mg) were cultured in flow-through systems for 60 days. Fry were fed with four different diets containing: 0.08% vitamin C (D1), 0.5% Achyranthes aspera seeds (D2), both vitamin C and seeds (D3), and a control (D4). Average weight (271.82 ± 4.90 g) and specific growth rate (1.39 ± 0.03) were significantly higher in fish fed D3 compared to the others. Digestive enzyme activities were significantly higher in D3 compared to the others. EPA content was significantly higher in D2 (110.33 ± 0.94 mg 100 g−1) and D3 (109.87 ± 1.87 mg 100 g−1); DHA (342.70 ± 0.77 mg 100 g−1) and n-3 PUFA (496.17 ± 1.82 mg 100 g−1) contents were significantly higher in D3 compared to the others. The expression of fads2d6 was significantly higher in D3 (6.70-fold) and elovl5 in D2 and D3 (1.51–1.45-fold) compared to the others. Enriched diets improved fish flesh composition.
{"title":"The study of effect of vitamin C and Achyranthes aspera seeds enriched diets on the growth, biochemical composition, digestive enzyme activities and expressions of genes involved in the biosynthesis of fatty acids in Snow trout Schizothorax richardsonii (Gray, 1832)","authors":"Guddu Kumar, J. Sharma, R. Goswami, A. Shrivastav, Dr. Neelesh Kumar, S. Chandra, R. Chakrabarti","doi":"10.1080/10454438.2021.1985679","DOIUrl":"https://doi.org/10.1080/10454438.2021.1985679","url":null,"abstract":"ABSTRACT Snow trout, Schizothorax richardsonii (Gray, 1832), is an economically important fish in the Himalayan region. Snow trout fry (118.53 ± 5.42 mg) were cultured in flow-through systems for 60 days. Fry were fed with four different diets containing: 0.08% vitamin C (D1), 0.5% Achyranthes aspera seeds (D2), both vitamin C and seeds (D3), and a control (D4). Average weight (271.82 ± 4.90 g) and specific growth rate (1.39 ± 0.03) were significantly higher in fish fed D3 compared to the others. Digestive enzyme activities were significantly higher in D3 compared to the others. EPA content was significantly higher in D2 (110.33 ± 0.94 mg 100 g−1) and D3 (109.87 ± 1.87 mg 100 g−1); DHA (342.70 ± 0.77 mg 100 g−1) and n-3 PUFA (496.17 ± 1.82 mg 100 g−1) contents were significantly higher in D3 compared to the others. The expression of fads2d6 was significantly higher in D3 (6.70-fold) and elovl5 in D2 and D3 (1.51–1.45-fold) compared to the others. Enriched diets improved fish flesh composition.","PeriodicalId":15031,"journal":{"name":"Journal of Applied Aquaculture","volume":"35 1","pages":"489 - 509"},"PeriodicalIF":1.2,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46348028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-10DOI: 10.1080/10454438.2021.1985032
K. Osterheld, J. Davidson, L. Comeau, Tiago Hori, C. Belzile, R. Tremblay
ABSTRACT Recently, there is a greater interest for the development of mussel Mytilus edulis hatcheries, particularly for the production and commercialization of triploid bivalves. The aims of this study were to examine the efficiency of inducing triploid mussels by various treatments and to determine the effect of triploidy on larval development. To produce triploids, extrusion of the second polar body of fertilized eggs was inhibited by 6-(dimethylamino)purine (6-DMAP), cold-shock, or heat-shock treatments. Triploidy was detected by flow cytometry for all the treatments. Treatment with 6-DMAP was the most efficient with a rate of triploidy of 90%, followed by heat-shock (56%) and cold-shock (30%) treatments. No survival differences were observed between diploids and 6-DMAP-induced triploid larvae from the D-shape stage up to their settlement. Moreover, increased growth was observed in triploid larvae compared to diploid larvae. Overall, this study showed that 6-DMAP is a highly efficient method to induce triploidy in mussels, with triploid larvae having faster growth compared to diploid.
{"title":"Efficiency of various strategies to induce triploidy in Mytilus edulis in relation to their first-stage performance","authors":"K. Osterheld, J. Davidson, L. Comeau, Tiago Hori, C. Belzile, R. Tremblay","doi":"10.1080/10454438.2021.1985032","DOIUrl":"https://doi.org/10.1080/10454438.2021.1985032","url":null,"abstract":"ABSTRACT Recently, there is a greater interest for the development of mussel Mytilus edulis hatcheries, particularly for the production and commercialization of triploid bivalves. The aims of this study were to examine the efficiency of inducing triploid mussels by various treatments and to determine the effect of triploidy on larval development. To produce triploids, extrusion of the second polar body of fertilized eggs was inhibited by 6-(dimethylamino)purine (6-DMAP), cold-shock, or heat-shock treatments. Triploidy was detected by flow cytometry for all the treatments. Treatment with 6-DMAP was the most efficient with a rate of triploidy of 90%, followed by heat-shock (56%) and cold-shock (30%) treatments. No survival differences were observed between diploids and 6-DMAP-induced triploid larvae from the D-shape stage up to their settlement. Moreover, increased growth was observed in triploid larvae compared to diploid larvae. Overall, this study showed that 6-DMAP is a highly efficient method to induce triploidy in mussels, with triploid larvae having faster growth compared to diploid.","PeriodicalId":15031,"journal":{"name":"Journal of Applied Aquaculture","volume":"35 1","pages":"473 - 488"},"PeriodicalIF":1.2,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47530161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-06DOI: 10.1080/10454438.2021.1970076
F. Cipriano, R. K. Luz, João Paulo Lorenzini, C. L. Nakayama, L. Neves, Lucas Pedro Gonçalves-Júnior, Kauana Santos de Lima, Franklin Fernando Batista da Costa, K. C. Miranda-Filho
ABSTRACT Velifera molly (Poecilia velifera) has an ecophysiological interest related to euryhalinity. To evaluate its tolerance and performance in different salinities, and the ability to be reared at diverse locations, Median Lethal Salinity (LS50) and growth performance were investigated. In experiment 1, 120 juveniles were tested through direct transfer to salinities 0, 24, 48, 60, 72, and 78 psu for 96 h. In experiment 2, 160 juveniles were gradually acclimatized to salinities 0, 12, 24, and 36 psu. The experiment was conducted using recirculation aquaculture systems (RAS) for 75 d. LS50-96 h was estimated at 71.1 psu and safe salinity at 7.1 psu. The final weight, weight gain, and feed intake had an inverse relationship to salinity, reflecting the sublethal effects. The apparent feed conversion rate was directly related to salinity, presented a better performance in freshwater conditions. There was no mortality in experiment 2, allowing the species to be maintained for long periods in the analyzed salinities.
{"title":"Tolerance to salinity and its effect on development of velifera molly Poecilia velifera (Regan 1914)","authors":"F. Cipriano, R. K. Luz, João Paulo Lorenzini, C. L. Nakayama, L. Neves, Lucas Pedro Gonçalves-Júnior, Kauana Santos de Lima, Franklin Fernando Batista da Costa, K. C. Miranda-Filho","doi":"10.1080/10454438.2021.1970076","DOIUrl":"https://doi.org/10.1080/10454438.2021.1970076","url":null,"abstract":"ABSTRACT Velifera molly (Poecilia velifera) has an ecophysiological interest related to euryhalinity. To evaluate its tolerance and performance in different salinities, and the ability to be reared at diverse locations, Median Lethal Salinity (LS50) and growth performance were investigated. In experiment 1, 120 juveniles were tested through direct transfer to salinities 0, 24, 48, 60, 72, and 78 psu for 96 h. In experiment 2, 160 juveniles were gradually acclimatized to salinities 0, 12, 24, and 36 psu. The experiment was conducted using recirculation aquaculture systems (RAS) for 75 d. LS50-96 h was estimated at 71.1 psu and safe salinity at 7.1 psu. The final weight, weight gain, and feed intake had an inverse relationship to salinity, reflecting the sublethal effects. The apparent feed conversion rate was directly related to salinity, presented a better performance in freshwater conditions. There was no mortality in experiment 2, allowing the species to be maintained for long periods in the analyzed salinities.","PeriodicalId":15031,"journal":{"name":"Journal of Applied Aquaculture","volume":"35 1","pages":"380 - 393"},"PeriodicalIF":1.2,"publicationDate":"2021-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43485384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-06DOI: 10.1080/10454438.2021.1986193
João Rodolfo Matias da Cunha Costa, S. Ratcliff, M. Y. Tsuzuki, M. Schwarz
ABSTRACT Improving larval nutrition is a key aspect to enhancing larval survival and shortening the larval cycle of the cleaner shrimp Lysmata amboinensis, the most traded shrimp species in the marine ornamental industry. A 30-day feeding trial was conducted in order to investigate the effect of the different feeding schemes: AT- Enriched Artemia meta-nauplii + Thalassiosira pseudonana; RAT- Enriched rotifers + enriched Artemia + T. pseudonana; CAT- Apocyclops panamensis copepodites + Enriched Artemia + T. pseudonana; STR- under starvation, upon growth, survival, and development of L. amboinensis larvae. Larvae in the CAT and STR treatments survived for over 3 days, however, total mortality occurred before day 6 in both treatments, whereas in RAT, larvae had an average survival (± SD) of 68.3 ± 12.5% by the end of the trial and those in AT showed a survival of 30.0 ± 5.0%. Development rate was also higher in RAT, where 44.3 ± 13.8% of the larvae were able to reach the zoea X stage by the end of the experiment. Among the larvae in AT, 88.5 ± 10.3% of them were at the zoea IX stage and a small percentage of the larvae were still at the zoea VIII stage on day 30. Growth in AT (2.02 ± 0.33 mm) was lower than in RAT (3.50 ± 0.26 mm). These results suggest that a diverse diet based on a combination of rotifers, Artemia and the microalgae T. pseudonana promotes a satisfactory performance of early to intermediate L. amboinensis zoea stages.
{"title":"Co-feeding schemes affect survival, growth, and development in the larviculture of the Striped cleaner shrimp Lysmata amboinensis (de Mann, 1888)","authors":"João Rodolfo Matias da Cunha Costa, S. Ratcliff, M. Y. Tsuzuki, M. Schwarz","doi":"10.1080/10454438.2021.1986193","DOIUrl":"https://doi.org/10.1080/10454438.2021.1986193","url":null,"abstract":"ABSTRACT Improving larval nutrition is a key aspect to enhancing larval survival and shortening the larval cycle of the cleaner shrimp Lysmata amboinensis, the most traded shrimp species in the marine ornamental industry. A 30-day feeding trial was conducted in order to investigate the effect of the different feeding schemes: AT- Enriched Artemia meta-nauplii + Thalassiosira pseudonana; RAT- Enriched rotifers + enriched Artemia + T. pseudonana; CAT- Apocyclops panamensis copepodites + Enriched Artemia + T. pseudonana; STR- under starvation, upon growth, survival, and development of L. amboinensis larvae. Larvae in the CAT and STR treatments survived for over 3 days, however, total mortality occurred before day 6 in both treatments, whereas in RAT, larvae had an average survival (± SD) of 68.3 ± 12.5% by the end of the trial and those in AT showed a survival of 30.0 ± 5.0%. Development rate was also higher in RAT, where 44.3 ± 13.8% of the larvae were able to reach the zoea X stage by the end of the experiment. Among the larvae in AT, 88.5 ± 10.3% of them were at the zoea IX stage and a small percentage of the larvae were still at the zoea VIII stage on day 30. Growth in AT (2.02 ± 0.33 mm) was lower than in RAT (3.50 ± 0.26 mm). These results suggest that a diverse diet based on a combination of rotifers, Artemia and the microalgae T. pseudonana promotes a satisfactory performance of early to intermediate L. amboinensis zoea stages.","PeriodicalId":15031,"journal":{"name":"Journal of Applied Aquaculture","volume":"35 1","pages":"529 - 542"},"PeriodicalIF":1.2,"publicationDate":"2021-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43806852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-06DOI: 10.1080/10454438.2021.1973936
M. W. S. Ribeiro, A. T. Oliveira, T. B. Carvalho
ABSTRACT Environmental changes can cause physiological alterations in fish, which may affect some behavioral patterns. We evaluated the effects of water temperature on the aggressive behavior of male freshwater angelfish, Pterophyllum scalare. We subjected pairs to three water temperature conditions: low (23.8 ± 0.8°C), medium (27.9 ± 1.2°C), and high (31.7 ± 1.0°C), with eight repetitions each. We assessed latency to fighting, aggressive interaction frequency, and territorial defense. In low and high temperatures there was a reduction in aggressive behavior exhibitions in comparison to medium temperatures (P < 0.05). As a result, water temperature can influence aggressive motivation and territorial establishment, given that temperatures closer to species optima (27.9 ± 1.2°C) can favor social contests for an Amazonian ornamental cichlid species, P. scalare.
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Pub Date : 2021-10-06DOI: 10.1080/10454438.2021.1986192
N. Kasozi, B. Wilhelmi, H. Kaiser
ABSTRACT The effects of adding a probiotic mixture of Bacillus subtilis and B. licheniformis to an aquaponics system on water quality, fish growth and digestive enzyme activity in Mozambique tilapia, Oreochromis mossambicus, were tested. The fish (36.4 g fish−1 ± 0.10; 3.64 kg m−3 tank volume, 10 fish per tank) were kept in 386-L systems and fed 2% of body mass day−1 for ten weeks. The Bacillus product (Sanolife®PRO-W; 5.0 × 1010 CFU g−1) was added twice weekly. Each treatment was duplicated. The product reduced total dissolved solids and electrical conductivity levels and increased weight gain of Mozambique tilapia. There was no difference between treatment and control in the proximate analysis of the fish. In the Bacillus treatment the activity of the digestive enzymes α-amylase, alkaline protease and alkaline phosphatase was higher than in the control. The probiotic used in this study improved water quality and increased fish growth.
摘要研究了在水培系统中添加枯草芽孢杆菌和地衣芽孢杆菌混合益生菌对莫三比克罗非鱼水质、鱼体生长和消化酶活性的影响。鱼(36.4 g鱼−1±0.10;鱼缸容积为3.64 kg m−3，每个鱼缸10条鱼)，饲养在386-L的系统中，每天饲喂体重2%的饲料，持续10周。芽孢杆菌产品(Sanolife®PRO-W;5.0 × 1010 CFU g−1)，每周添加两次。每次治疗都是重复的。该产品降低了莫桑比克罗非鱼的总溶解固体和电导率水平，并增加了其体重。在鱼的近似分析中，处理和对照之间没有差异。在芽孢杆菌处理下，消化酶α-淀粉酶、碱性蛋白酶和碱性磷酸酶活性均高于对照组。本研究中使用的益生菌改善了水质，促进了鱼类的生长。
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