International Journal of Oceanography & Aquaculture最新文献

{"title":"For an Effective and Sustainable Management of Non-Tydal Lagoon Environments to Counteract the Eutrophication Effects","authors":"Lenzi M","doi":"10.23880/ijoac-16000203","DOIUrl":"https://doi.org/10.23880/ijoac-16000203","url":null,"abstract":"Coastal lagoon environmental picture with the tendency to accumulate organic detritus, structural eutrophication, risks of dystrophy, with loss of biodiversity and fish products, is briefly described. Mitigation solutions are analyzed, focusing on the removal of macroalgal masses, artificial water renewal, sediment oxidation and more, highlighting the limits and benefits of each solution. With regard to the sediment oxidation, on which more emphasis is placed here, a review of the results obtained on two Tyrrhenian lagoons is made, through field experiences conducted between 2005 and 2021. These results showed an overall mitigation of the eutrophication effects, with reduction of nutrient load and sediment labile organic matter, reduction of macroalgal development, phanerogam return and increase in zoobenthonic biodiversity. Some possible effects of sediment resuspension on contaminants are reported.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography & Aquaculture","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130234120","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}

{"title":"Passive Phyto-Remediation of Heavy Metals by Biosorption of Sargassum cinereum","authors":"S. R.","doi":"10.23880/ijoac-16000219","DOIUrl":"https://doi.org/10.23880/ijoac-16000219","url":null,"abstract":"The industrial effluents with a high amount of pollutant, including heavy metals have adverse effects on the aquatic environment. Different costly conventional treatment technologies are applying for removal of heavy metals from the marine environment. The conventional treatment technologies produce a huge load of toxic chemical sludge on the environment. There is a need of detoxification of environment applying any biological method. So, remediation of heavy metals by marine macro algae is a novel eco-friendly alternative approach. The brown seaweed Sargassum cinereum were used as bio-absorber for heavy metals. To test the biosorption capacity of this brown seaweed, the artificial set up of heavy metal polluted environment were made within the beakers by keeping various concentration of heavy metal solution, and within that concentrated solution, Sargassum cinereum were emerged as per required amount. An optimized and validated Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) has been applied to analyse elements, including, trace metals (Fe, Pb, Cr, As and Ag). The brown seaweed Sargassum cinereum used as bio-absorber for heavy metals. The artificial set up of heavy metal polluted environment were made within beaker by keeping various concentration of heavy metal solution, then Sargassum cinereum were used as per required amount. The iron concentration was 3520.35ppb in normal fresh Sargassum cinereum but Sargassum cinereum which was treated with various concentration of iron solution, showed very high concentration of iron. After 48 hours of treatment with 0.25mM iron solution Sargassum cinereum absorbed 6679.70ppb iron from the solution and treated with high concentration of iron solution such as 4mM absorbed maximum iron such as 21781.3089ppb. Similarly, Sargassum cinereum also have capacity of bio-sorption of Pb, Hg. The metal bio-absorption of Sargassum cinereum remarked for its metal storage capacity. It has been concluded that Sargassum cinereum absorb high amount of Fe, Pb and Hg from solution, so Sargassum cinereum may be use for heavy metal bio-absorption as phyco-cleaner of heavy metals from heavy metal polluted environment. In future, this brown seaweed may be used for cleaning of polluted environment cost effectively","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography & Aquaculture","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128012588","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}

{"title":"Note on the Presence of the Crab Callinectes Sapidus Rathbun, 1896 on the African Atlantic Coast: Case of the Ramsar Ecological Site ‘’ Merja Zerga‘’","authors":"M. Fekhaoui","doi":"10.23880/ijoac-16000211","DOIUrl":"https://doi.org/10.23880/ijoac-16000211","url":null,"abstract":"Following a scientific prospecting mission, a direct observation of the crab Callinectes sapidus Rathbun, 1896 was recorded. This observation confirms the expansion of this species in the Atlantic fringe, including the Merja Zerga Biological Reserve","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography & Aquaculture","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130516692","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}

{"title":"Live Feeding Strategy for Striped Snakehead Fish (Channa striata) Larvae","authors":"Muhammad Ikbal Illijas","doi":"10.23880/ijoac-16000230","DOIUrl":"https://doi.org/10.23880/ijoac-16000230","url":null,"abstract":"Snakehead fish is an important freshwater fish in several developing countries, such as Vietnam, Malaysia, Bangladesh, and Indonesia. This fish has the potential to be cultivated. This study aimed to determine the feeding live feed strategy on snakehead fish, specifically from endogenous to exogenous live feed. This natural feeding transition is crucial for snakehead fish culture. The brood stock fish spawned naturally, and then the eggs were incubated and hatched in an aquarium. The newly hatched larvae were kept in an aquarium for two days before subjected to experiments. A total of 200 larvae were put into the aquarium and maintained without feeding. The mortality rate of larvae was calculated every hour until all larvae die. The second experiment was to calculate the amount of live feed Artemia salina consumed by larvae every day and identify the stage of the larva, where the consumption of live feed could be reduced and replaced with artificial food. All the experiment units were carried out with 3 replications. The results showed that the newly hatched larvae without being fed could survive up to 3 days, but after 10 days, the mortality reached 50%, and after 18 days, the mortality reached 100%. Consumption of live feed could be started on larvae aged 3 to 11 days after hatching, at age 12 to 17 days, larvae must be fed with a combination of live feed and artificial food with more amounts of live feed than artificial food, and at the age of 18 to 22 days after hatching the amount of live feed can be reduced, and the amount of artificial feed is increased. Therefore, the accuracy of feeding is a very important stage in aquaculture, especially in fish hatcheries.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography & Aquaculture","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123879963","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}

{"title":"Development of Semi-Dried and Smoked Laminates from Pangasius Sp. and it’s Storage Stability under Vacuum Packaging","authors":"B. Dhar","doi":"10.23880/ijoac-16000232","DOIUrl":"https://doi.org/10.23880/ijoac-16000232","url":null,"abstract":"Fish is an easily digestible food with rich in protein content and nutritional value, but also a highly perishable product especially in hot climates and tropical areas. Many traditional curing practices are followed in order to preserve this perishable meat and also for value addition with minimum cost involvement. Since the traditional process of drying and smoking is associated with unhealthy conditions and poorquality product, it could be improved by adopting mechanical process. Pangasius fish, due to the high fat content and distinctive odour, are much less preferred by the consumer, thus offering lower prices. Therefore, value addition of this product would be a better option to use. In this study, semi dried laminates and smoked laminates has been developed through increases surface area to ensuring uniform drying and were improved the shelf life or oxidation of lipids could be controlled by vacuum packaging at ambient condition. The data showed that there was a no significant effect of moisture, SSP and rehydration capacity, between both products while protein, lipid, ash, NPN, TVBN, PV and TBA was significant effect between both products during storage period (84 days) at the p<0.05 level. TPC content was found to exceed its acceptable limits after 8 weeks. The sensory data revealed that smoked laminates has acceptable limit for maximum 10-12 weeks and semi-dried one for 8 weeks.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123964623","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}

{"title":"The Process of Heat Transfer to the Sea Caused by Wastewater from the Central Cooling System of Vinh Tan Thermal Power, Binh Thuan - Vietnam","authors":"Pham Xuan Duong","doi":"10.23880/ijoac-16000217","DOIUrl":"https://doi.org/10.23880/ijoac-16000217","url":null,"abstract":"Every day Vinh Tan thermal power center needs millions of gallons of seawater to cool the machinery system and that volume of seawater will eventually return to the sea. This volume of seawater with a temperature ranging from 32-35 degree celsius pouring into the sea will spread heat to the surrounding environment in a large area, down to the deep layer of the sea. Quantifying the affected space and water temperature, I’m using the ROMS (Regional Ocean Modeling System) model to solve this process. The source of boundary condition data for ROMS is obtained from the databases of NOMADS, COADS, QuikSCAT, TPXO7.1 through OPenDAP data access protocol. Topographic data sources, factory discharge water, river water flow, sea water temperature, discharge water temperature were collected from field measurements. The study area is the coastal sea waters from Hon Dinh headland to Ne headland covered by a network of 80x110 points in the horizontal direction and 5 sigma layers in the vertical direction. The results show that a strip of water with high temperature appears from the outlet of the factory towards the south and parallel to the shoreline. Heat transfer in layers has a similar thing which is very limited to the north because the flow effect from north to south is dominant. A strip of high-temperature water spread to the sea, after 10 days hot water had spread near Ne headland and after 30 days in all three layers, there was a coastal strip of water with a high temperature of over 28°C appearing to spread and stretch. long to the south, in the large surface this strip of water is larger than the middle layer, while the bottom layer is prolonged, but in some places it is interrupted and the hot water area is significantly smaller than the upper layers.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124769344","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}

{"title":"Seasonal Temperature-Salinity Variability at Khanh Hoa - Ca Mau Sea Region","authors":"Pham Xuan Duong","doi":"10.23880/ijoac-16000208","DOIUrl":"https://doi.org/10.23880/ijoac-16000208","url":null,"abstract":"Temperature-Salinity (T-S) data was analyzed from many investigations in northeast and southwest monsoon by lots of projects, which were surveyed at Khanh Hoa-Ca Mau sea region. The results showed that the variation of average temperature all domains in southwest monsoon is greater than in northeast monsoon at surface layer about 2.3°C, middle layer 1.2°C, and bottom layer 1.6°C. In addition, there are the same with variation of average salinity. Salinity in southwest monsoon is greater than in northeast monsoon at surface layer about 0.7‰, middle layer 0.3‰, and bottom layer 0.1‰. The seasonal variation of the two seasons has some common points, as temperature decrease steadily from south to north, salinity increase significant at bottom layer and maximum at 34.54‰. T-S variability in temporal and special scale is showed at three layers: T-S variability is small at the first layer (from surface to 10 m), is strong at the second layer (from 10m to 40m), and is quite stable at the third layer (from 40m to bottom).","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123042052","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}

{"title":"The Adverse Effects of Underwater Sound upon Fishes and Invertebrates","authors":"A. Hawkins","doi":"10.23880/ijoac-16000233","DOIUrl":"https://doi.org/10.23880/ijoac-16000233","url":null,"abstract":"Underwater sound is very important to most fishes and invertebrates. Underwater sounds from both natural and human sources can have adverse effects upon aquatic animals, and especially fishes, and invertebrates. It is important to examine the effects of sound upon them, and especially the effects of sounds derived from human sources (anthropogenic sounds). It may be possible to introduce protective regulations to reduce their effects. Fishes and invertebrates can detect underwater sounds, and they use sound to obtain key information about the environment around them. They can also make sounds themselves, especially during their spawning. Sounds travel rapidly over great distances in water and can provide detailed information to these animals on the presence of prey, predators, and related species, while the overall acoustic scene provides them with key information about their environment. Anthropogenic sounds can be very harmful, and it is therefore important to deal with them. A succession of reports and scientific papers have emphasised the risks to these animals from exposure to man-made sounds or noise and will be mentioned in this paper, which also deals with the Criteria and Metrics for assessing the effects of underwater sound on fishes and invertebrates.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124694946","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}

{"title":"Phytoplankton Species in Linkage to Water Quality and Landsat Data Indices at the Southern Part of Burullus Lake, Egypt","authors":"Muhammad A. El-Alfy","doi":"10.23880/ijoac-16000214","DOIUrl":"https://doi.org/10.23880/ijoac-16000214","url":null,"abstract":"In aquatic ecosystems, phytoplankton assemblages are mostly affected by different water quality parameters. In March 2020, water and phytoplankton samples were collected from seven geo-referenced stations distributed along the southern part of Lake Burullus, in front of drains. Physio-chemical parameters (temperature T°C, pH, dissolved oxygen DO, Salinity, nitrite NO2 , phosphate PO4 , ammonia NH4 , and silicates SiO4 ) were analyzed in water samples. Phytoplankton samples were collected using a net mesh of a size of 20 µm. The most abundant classes are Chlorophyceae, Cyanophyceae, and Euglenophyceae in stations 7, 2, and 6, respectively. The difference between classes and species is based on the different discharge of wastes, the high load of organic matter, and salinity. Results of the average water quality index AWQI showed low water quality in front of drainage waters. The vegetative cover increases on the eastern side. Landsat images were acquired, treated, and processed for concluding three important indices along with the three sectors of the lake. These indices are normalized difference vegetation index (NDVI), normalized difference water index (NDWI), and phytoplankton turbidity index (PTI). The NDVI showed that the vegetation-covered areas of about 11.3, 2.6, and 1.36 km2 , and NDWI showed water areas of about 105.09, 153.25, and 43.57 km2 for eastern, middle, and western parts, respectively. PTI indicated that nearly 55.3% of phytoplankton turbidities concentrated towards the western side of the lake, followed by 44.21% at the middle part and 25.14 % on the eastern side. It is concluded that water quality nearby drains are bad, where the phytoplankton turbidities as observed from Landsat images were increased towards the southwestern parts.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125838273","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}

{"title":"Climate and Hydro Engineering","authors":"Khalidullin Oh","doi":"10.23880/ijoac-16000220","DOIUrl":"https://doi.org/10.23880/ijoac-16000220","url":null,"abstract":"Every natural phenomenon is the result of one and the cause of the other.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121644812","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}