International Journal of Oceanography & Aquaculture最新文献

{"title":"Seiches in the Semiclosed Seas of the Continental Shelf","authors":"Inzhebeikin Yu","doi":"10.23880/ijoac-16000199","DOIUrl":"https://doi.org/10.23880/ijoac-16000199","url":null,"abstract":"Seiche movements in two small areas of semi-closed seas on the Continental Shelf (the White Sea and the Sea of Azov) with very different morphometric characteristics are considered in this paper. In addition, tidal movements are highly developed in the White sea, while in the Azov sea tides are virtually absent. We’ve used morphometric characteristics of the seas, including the ones recently obtained by the Azov Sea, as well as methods of numerical hydrodynamic simulation based on the theory of shallow water, and spectral analysis of the observation data of the sea level fluctuations.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography & Aquaculture","volume":"22 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":"114514484","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":"Method for Estimating Ecological Carrying Capacity of DataPoor Coastal Finfish Cage Aquaculture Sites in Southeast Asia at System-Scale","authors":"R. Mayerle","doi":"10.23880/ijoac-16000212","DOIUrl":"https://doi.org/10.23880/ijoac-16000212","url":null,"abstract":"This study presents the development of a simple and generally applicable method for estimating ecological carrying capacity (ECC) of coastal finfish cage aquaculture at the system-scale in Southeast Asia and potentially other data-poor island nations. The ECC method relies primarily on results of dynamic models for simulation of organic loading due to multiple fish farms. In this study, the ECC method was successfully integrated within a methodology under development at Kiel University to holistically evaluate site suitability, ecological carrying capacities at farm-level and system-scale, as well as siting. Results of the application of the methodology for a target aquaculture site in northwest Bali, Indonesia, are presented in this study. Analysis of these results identified traditional fish farms located outside suitable areas and large-scale commercial farm clusters operating beyond ecological carrying capacity. Nonetheless, it was found that production output of the site in Bali is far below ECC and that it could be increased considerably without harming the environment. Recommendations have been made for reallocating the mispositioned farms as well as for reducing fish production of the farm clusters while expanding overall fish production to the east. The ongoing operational early warning monitoring at the site in Bali is being supplemented with regular monitoring of sediment quality in the seafloor and water quality in the aquaculture area to promote sustainable development. The proposed methodology has wide applicability and can be easily adapted to other regions for investigating present conditions and planning new aquaculture sites in pristine regions. The methodology is currently being up scaled to several target sites selected by the Indonesian Government to expand the activity.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography & Aquaculture","volume":"50 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":"130950719","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":"Oil Spills and Remote Sensing Monitoring Challenges","authors":"M. Marghany","doi":"10.23880/ijoac-16000234","DOIUrl":"https://doi.org/10.23880/ijoac-16000234","url":null,"abstract":"This article has illustrated a handful of other concepts in addition to oil spills. This study investigated the harm caused by oil spills in a region, as well as the consequences of oil exploration and extraction on the environment, economy, and politics. The concept of oil spills, their causes, their different types, and the impacts of these calamities on the marine ecosystem are all covered in detail in this review. Oil spill management and response are essential for the environment and society. This review also provides basic information on monitoring oil spills from space. Optical and microwave remote sensing techniques have been used to address oil spill monitoring issues. The possibility of false alarms from lookalikes is the main problem when using radar and microwave data to monitor an oil spill. Therefore, numerous issues must be addressed to detect oil spills in space. It is crucial to combine these technologies with additional approaches such as in situ measurements and ground-based observations.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography & Aquaculture","volume":"94 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":"123038602","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 New Clouds","authors":"Khalidullin Oh","doi":"10.23880/ijoac-16000221","DOIUrl":"https://doi.org/10.23880/ijoac-16000221","url":null,"abstract":"The Earth’s climate and water cycle have been improving for millions of years.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography & Aquaculture","volume":"16 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":"117232824","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":"Evaluation of Haematological and Biochemical Changes in Catfish (Clarias Gariepinus) Fed Ginger Additive Meal Diets","authors":"Esther Kela","doi":"10.23880/ijoac-16000210","DOIUrl":"https://doi.org/10.23880/ijoac-16000210","url":null,"abstract":"Clarias gariepinus adults were fed varying levels of ginger additive meal diets (0 mg/g, 25 mg/g, 50 mg/g, 75 mg/g and 100 mg/g), respectively, in order to evaluate their effects on the biochemical and haematological parameters of fish. Blood biochemical analysis was performed at the end of 84 days by taking the portion of the collected blood and was dispensed into non-heparinised tubes. There were significant increases (P < 0.05) in glucose, aspertate transferase, alanine transferase, and sodium concentrations respectively. The activity of potassium, creatinine and serum protein changed in a non-significant (P > 0.05) manner with increasing concentrations of additive diets compared to the control. Although no definite trend in the values of computed biochemical indices was observed. However, glucose, aspertate transferase (AST), alanine transferase (ALT), urea, creatinine, sodium, and potassium increased with varying additive inclusion concentration. Also, Glucose, ALT, AST, Urea, creatinine, sodium and potassium activities of all the fish, which have been fed ginger additive meal diets were significantly higher (p<0.05) in comparison to their respective control. Results also showed that there were increase in the blood parameters of Clarias gariepinus fed ginger additive meal diets compared to the control diet except in mean cell haematocrit (MCV) but were statistically different (p<0.05). Highest Packed cell volume (PCV) of 31.00% were recorded in diet (GD3), White Blood Cell (WBC), 8.00 x 103 in GD2, and red blood cell (RBC) 8.70 x 106; while highest Haemoglobin (Hb), 11.00 g/dl were recorded in fish fed diet GD3. All blood parameters obtained were between the range of recommended fish blood. It is concluded that using ginger as additive feed on Clarias gariepinus showed a slight increase in the haematological parameters compared with the control diet (GD1) except in MCV but it has no negative effect on the health status of the studied fish.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"14 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":"114510145","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":"Design of Sampling Strategy Measurements of Co2/Carbonate Properties","authors":"C. Goyet","doi":"10.23880/ijoac-16000227","DOIUrl":"https://doi.org/10.23880/ijoac-16000227","url":null,"abstract":"In order to study a (terrestrial or oceanic) field area, scientists need first to design a sampling strategy. At first, when nothing is known about this field, there is no other choice than to sample as much as possible wherever it is possible. Then, as something become known about some properties of the field, it becomes possible to use mathematical equations to design a scientifically sound sampling strategy based upon the various constraints (aimed accuracy, number of samples/measurements, etc.), of the study. Based upon available sea-surface salinity and sea-surface temperature data, this work shows a practical and simple way to design a sampling strategy with known accuracy for total CO2 and total alkalinity measurements in sea-surface waters. The results indicate the need to continue to sample the sea-surface waters but with specific designs of sampling strategy to reach the scientific objectives with known maximum error.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"31 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120998695","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":"Zooplankton Productivity and Growth Performance of Three Fish Species (Oreochromis niloticus, Heterotis niloticus and Hemichromis fasciatus) in Polyculture Ponds in the Binomial Rainforest Zone of East Cameroon","authors":"Songmo Berlin-Leclair","doi":"10.23880/ijoac-16000205","DOIUrl":"https://doi.org/10.23880/ijoac-16000205","url":null,"abstract":"One of the major constraints of production aquaculture is due to the partial control of the ecology of fish ponds. The study on the zooplankton productivity in polyculture of the three species of fish according to the type of pond was continued from January to December 2019 in the forest zone with binomial rainfall of East Cameroon in order to optimize production fish farming. For this purpose, 32 ponds including 16 bypass and 16 dam were used. The physicochemical characteristics of the water, zooplankton and fish growth were collected monthly according to standard methods. Transparency (42.64 ± 5.40 cm) and dissolved oxygen ((6.32 ± 1.71)*10-3 mg/dm3 )) values were significantly (p <0.05) higher in bypass ponds. Conversely, nitrites ((0.04 ± 0.01)*10-3 mg/dm3 )) and ammonium ((0.30 ± 0.09)*10-3 mg/dm3 )) which were significantly (p <0.05) higher in the ponds of dam. However, no significant difference (p> 0.05) was observed for temperature, pH, nitrates, ammonium and phosphates regardless of the type of pond. A total of 101 species, 33 genera and 20 family of the three groups of zooplankton have been identified in the bypass ponds. On the other hand, 83 species, 39 genera and 22 family have been identified in the dam ponds. The highest density values of rotifers (7 ± 5 ind/dm3 ) and cladocerans (6 ± 4 ind/dm3 ) were obtained in the dam ponds while that of copepods (6 ± 3 ind/dm3 ) was observed in bypass ponds. The highest values of weight gain (390.28 ± 74.04g) and specific growth rate (0.76 ± 0.05%) in O. niloticus as well as those of weight gain recorded (2227.60 ± 392.35g) and the specific growth rate (0.93 ± 0.04%) recorded in H. niloticus were obtained in the dam ponds. At the end of the study, we recommend that fish farmers practice polyculture of the three species in the dam ponds.","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":"131901685","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":"Induced Breeding Practices of the Freshwater Fish Hatcheries in Bangladesh","authors":"Chakraborty Bk","doi":"10.23880/ijoac-16000225","DOIUrl":"https://doi.org/10.23880/ijoac-16000225","url":null,"abstract":"This study was conducted on the fish hatcheries of the 8 division of Bangladesh to identify about induced breeding practices of different hatcheries. About 6 native species viz. Rui (Labeo rohita), Catla (Catla catla), Mrigel (Cirrhinus mrigala), Calibaush (Labeo calbasu), Bata (Labeo bata) and Gonia (Labeo gonius), 7 exotic species viz. Silver carp (Hypopthalmicthys molitrix), Bighead carp (Hypopthalmicthys molitrix), Grass carp (Ctenopharyngodon idella), Common carp (Cyprinus carpio), Black carp (Mylopharyngodon piceum), Thai pangus (Pangasius sutchi), Thai puti or raj puti (Barbonymus gonionotus) and 06 Indigenous species pubda (Ompok pabda), Gulsa (Mystus cavasius), Tengra (Mystus tengra), Koi (Anabas testudineus), Shing (Heteronopneustes fossilis) and Magur (Clarius batrachus) were recorded for the induced breeding practice of fresh water of Bangladesh. Three types of inducing agents viz. PG (Pituitary Gland), HCG (Human Chorionic Gonadotropin) and GnRHa (Gonadotropin Releasing Hormone analogues) were used for induced breeding. Ovulation rate of Indian major carps and other exotic fish species were 65, 70, 74, 80, 84, 88, 92, 96, 98, 90 and 88%, respectively. The regression type is Polynomial and the equation is y = -0.751x2 + 11.36x +49.705 (R2 = 0.8449). The hatching rate were recorded at the rate of 52, 55, 62, 71, 77, 80, 86, 90, 94, 80 and 62%, respectively in different hatcheries and the regression type is Polynomial and the equation is y = -1.1254x2 + 15.96x +29.182 (R2 = 0.8328). The ovulation rate of 06 Indigenous fish species were 70, 76, 81, 84, 86, 88, 97, 98, 99, 90, 84 and 70%, respectively. The regression type is Polynomial and the equation is y = -1.0082x2 + 12.96x + 53.97 (R2 = 0.8749). The hatching rate were recorded at the rate of 58, 61, 72, 76, 82, 91, 93, 94, 73, 68 and 6%%, respectively. The regression type is Polynomial and the equation is y = -1.289x2 + 16.269x +36.958 (R2 = 0.849).","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"25 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":"125744346","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":"Role of Biofloc on Immuno Modulatory Responses of Cultured Aquatic Organisms","authors":"B. Am","doi":"10.23880/ijoac-16000229","DOIUrl":"https://doi.org/10.23880/ijoac-16000229","url":null,"abstract":"Intensification in aquaculture is the need of the hour to meet demand of protein by the population which is increasing at an exponential rate","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"66 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":"131537334","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":"Synergistic Effects of Medicinal Plants Carica papaya, Telferia ocidentalis and Oxytetracyline against some Pathogens Isolated from Clarias Gariepinus","authors":"S. Olusola","doi":"10.23880/ijoac-16000216","DOIUrl":"https://doi.org/10.23880/ijoac-16000216","url":null,"abstract":"The problem of fish diseases may be due to the development of antibiotic-resistant bacteria and there is an increasing awareness to determine the efficacy of plants as an alternative to treat microbial diseases of aquatic animals. Antibacterial and antifungal synergistic evaluation of methanolic and ethanolic extracts of Fluted Pumpkin Leaves (FPL), Pawpaw Leaves (PL) and combination with oxytetracycline were investigated using the agar cup diffusion and broth diffusion techniques. The extracts were tested against 8 clinical strains of Gram-positive and Gram-negative bacteria and a fungal. Minimum Inhibitory Concentration (MIC) of methanolic and ethanolic extracts of pumpkin, pawpaw leaves and combination with oxytetracycline were determined using standard methods. Data were analyzed using descriptive statistics. The extracts displayed higher antimicrobial properties to the Gram-positive and G negative bacteria and these plants inhibited the growth of all the microorganisms used in the study when combine with oxytetracycline at 10 mg/ml and 30 mg/ml. The diameter of the zone of inhibition of methanolic and ethanolic extracts of fluted pumpkin and pawpaw leaves when combine with oxytetracycline (10 mg/ml and 30 mg/ml) were higher than single application and combination of the two plants with oxytetracycline. The combination of extracts of each plant with oxytetracycline was found to be the most effective combination in retarding microbial growth of all tested pathogenic bacteria The results of MIC of methanolic and ethanolic extracts of pawpaw leaves, fluted pumpkin leaves and oxytetracycline at 10 mg/ml and 30 mg/ml range between 212.5 µg/ml - 850 µg/ml while the control doesn’t show any antimicrobial properties in terms of zone of inhibition and minimum inhibitory concentration. The results observed in the pumpkin and pawpaw leaves and combination with oxytetracycline can provide additive or synergistic inhibitory effects making them more effective as antimicrobial agents against fish pathogens.","PeriodicalId":252910,"journal":{"name":"International Journal of Oceanography &amp; Aquaculture","volume":"61 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":"124271672","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}