International Journal of Marine Biology and Research最新文献

Iodine Concentrations Prior to Initial Incubation Do Not Impact the Bacterial Communities of Landlocked Fall Chinook salmon Eggs at the Eyed Stage of Development 初始孵育前的碘浓度不会影响内陆秋季奇努克鲑鱼卵在眼睛发育阶段的细菌群落

International Journal of Marine Biology and Research Pub Date : 2018-08-29 DOI: 10.15226/24754706/3/2/00127

M. E. Barnes, D. Bergmann, J. Larson, Ta-Kang Liu, Nathan Huysman

{"title":"Iodine Concentrations Prior to Initial Incubation Do Not Impact the Bacterial Communities of Landlocked Fall Chinook salmon Eggs at the Eyed Stage of Development","authors":"M. E. Barnes, D. Bergmann, J. Larson, Ta-Kang Liu, Nathan Huysman","doi":"10.15226/24754706/3/2/00127","DOIUrl":"https://doi.org/10.15226/24754706/3/2/00127","url":null,"abstract":"Using iodine solutions to disinfect newly-spawned salmonid eggs is well established. This study examined the bacterial communities of eggs from five landlocked Chinook salmon Oncorhynchus tshawytscha females subjected to 10-minute treatments’ of 100, 200, or 400 mg/l of active iodine prior to hatchery incubation. Bacterial sampling of the eggs occurred prior to disinfection, immediately after disinfection and 28-days later at the eyed stage of development. Hatchery incubation water was also sampled. The number of cultivable bacteria on the external membrane of freshly-spawned eggs ranged from 10 to over 66 colony-forming units. All of the iodine treatments significantly reduced the number of bacteria compared to pretreatment samples, but there were no significant differences among the treatments. Numbers of cultivable bacteria on eggs at the eyed stage after 28 days of incubation were approximately 105 times greater than those observed on the freshly-spawned eggs. There were no significant differences in egg survival among the iodine treatment groups. Acinetobacter dominated the egg surface prior to iodine disinfection, and Psychrobacter also was common. Flavobacterium was the most prevalent bacterial genus from eyed-eggs, representing over 43% of the sequences. Vibrio and Variovorax were also abundant. The bacterial flora of the hatchery water was dominated by Proteobacteria, especially Pseudomonas species, with Massilia, Zoogloea, Leptospirillum, and Rhodococcus also abundant. No effects of iodine treatment level on the abundance or genera of bacteria on eyed-eggs were evident.","PeriodicalId":242716,"journal":{"name":"International Journal of Marine Biology and Research","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115711491","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}

引用次数: 1

Extraction of Agar and Alginate from Marine Seaweeds in Red Sea Region 红海地区海藻中琼脂和藻酸盐的提取

International Journal of Marine Biology and Research Pub Date : 2018-08-23 DOI: 10.15226/24754706/3/2/00126

K. S. Reddy, Adiam Abraham, Berihu Afewerki, B. Tsegay, Henok Ghebremedhin, B. Teklehaimanot

{"title":"Extraction of Agar and Alginate from Marine Seaweeds in Red Sea Region","authors":"K. S. Reddy, Adiam Abraham, Berihu Afewerki, B. Tsegay, Henok Ghebremedhin, B. Teklehaimanot","doi":"10.15226/24754706/3/2/00126","DOIUrl":"https://doi.org/10.15226/24754706/3/2/00126","url":null,"abstract":"Water constitutes major portion of the earth’s crust approximately (75%), and it applies to all biological organisms, including sea weeds. Its extraction is useful to human beings directly and indirectly. The study was conducted in Red Sea area of Massawa beaches and extracted agar and alginate from two varieties of red algae (Gracilaria arcuate) and brown algae (Turbinaria decurrens). These extractnats were having many applications for human benefits and also industrial applications such as binding agent and agro-based industry. These were analysed for their phycocolloids extraction (specifically agar and alginate). 20.4% of agar was extracted from Gracilaria arcuata according to the procedure of Geratrudes (1990). Gracilaria arcuata were pre-treated with Na2CO3 followed by NaOH treatment and finally by extraction. The results were found to be encouraging in its powdered product has been obtained. Parallel to that 25.6% powdered Sodium alginate was extracted by Green process from the extraordinary species of brown algae, Turbinaria decurrens and as per chemical analysis, positive result was obtained. According to the data from Hernandez-Carmona et al, (2013), agar is the most expensive colloid in worlds market, at US$18 per kg, followed by alginates and carrageenan at US$12 and US$10.5 per kg, respectively. Hence, new methods for extraction is required to obtain high quality byproducts from sea weeds.","PeriodicalId":242716,"journal":{"name":"International Journal of Marine Biology and Research","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122912632","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}

引用次数: 5

Impacts of Marine Waste, Ingestion of Microplastic in the Fish, Impact on Fishing Yield, M’diq, Morocco 海洋废物的影响，鱼类摄入微塑料，对渔业产量的影响，摩洛哥M 'diq

International Journal of Marine Biology and Research Pub Date : 2018-07-28 DOI: 10.15226/24754706/3/2/00125

Adel Alshawafi, M. Analla, Ebrahim Alwashali, Mariem Ahechti, M. Aksissou

引用次数: 14

Growth and N and P Absorption Capability of Pistia Stratiotes Cultured in the Inorganic Fertilizer Enriched Media 富无机肥培养基培养层状鱼的生长及吸氮磷能力

International Journal of Marine Biology and Research Pub Date : 2018-06-04 DOI: 10.15226/24754706/3/2/00124

Kamaruddin Eddiwan, E. fawani, Rizky Janatul Magwa

引用次数: 1

A Comparison between Microscopic and Molecular Methods for Identification of Ostreopsis Species in Marine Samples 海洋样品中Ostreopsis种类鉴定的显微与分子方法比较

International Journal of Marine Biology and Research Pub Date : 2018-05-30 DOI: 10.15226/24754706/3/2/00123

A. Giorgio, Annaclaudia Montanino, M. G. Aquila, Beatrice Cocozziello, M. Guida

{"title":"A Comparison between Microscopic and Molecular Methods for Identification of Ostreopsis Species in Marine Samples","authors":"A. Giorgio, Annaclaudia Montanino, M. G. Aquila, Beatrice Cocozziello, M. Guida","doi":"10.15226/24754706/3/2/00123","DOIUrl":"https://doi.org/10.15226/24754706/3/2/00123","url":null,"abstract":"An assessment of O. ovata and O. cf. siamensis presence in some seawater samples and on macro algae was carried out in the Mediterranean Sea. The identification of taxa investigated was performed using traditional microscopic techniques and molecular tools, to evaluate the distribution area of these species too. Ostreopsis includes epiphytic/benthonic microalgae known for their production of toxic compounds that can cause biopoisoning. Microscopic analysis reveal that the presence of Ostreopsis spp. and O. ovata in macroalgal samples is greater than in water ones. In a greater number of samples, through molecular analysis the presence of investigated species has been detected, in comparison to the previous results of microscopic analysis. They also allowed identifying Ostreopsis spp and O. ovata species even in those samples in which microscopic analysis hasn’t detected any cells, probably because it’s beneath the detection limit of method. However for environmental monitoring the microscopic analysis have proved useful to detect the presence with high-precision of these species in a marine environment and to monitor their proliferation in time while molecular approach could be expensive, difficult to apply and inaccurate first of all because of the impossibility to distinguish live cells from dead cells.","PeriodicalId":242716,"journal":{"name":"International Journal of Marine Biology and Research","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127933496","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}

引用次数: 0