Pub Date : 2019-01-16DOI: 10.19080/ofoaj.2019.08.555750
Adel A El-Lahamy
{"title":"Influence of Smoking Methods and Refrigeration Storage on Physiochemical Quality Parameters of Catfish (Clarias Gariepinus) Fillets","authors":"Adel A El-Lahamy","doi":"10.19080/ofoaj.2019.08.555750","DOIUrl":"https://doi.org/10.19080/ofoaj.2019.08.555750","url":null,"abstract":"","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126085166","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 : 2019-01-16DOI: 10.19080/OFOAJ.2018.08.555749
T. George
Climate change is expected to have a strong effect in the Mediterranean Sea [1]. Even though climate projections may be characterised by significant uncertainties, current climate model simulations have all indicated a significant warming in the Mediterranean Sea [2-4]. An increase of sea surface temperature is expected due to global warming, while decreased precipitation and river runoff might potentially result in an increase of salinity with an opposite effect on stratification, particularly in coastal river influenced areas. An increase of stratification may reduce the productivity through reduced enrichment of euphotic zone with deep-water nutrients. On the other hand, increased stratification may influence the North Aegean circulation that is dominated by the Black Sea Water (BSW) pathways and Levantine water inflow Figure 1, as well as the thermohaline circulation that is related to the N. Aegean nutrient balance. In particular, increasing stratification results in a weakened thermohaline circulation characterised by decreased Levantine water inflow and southward export of deep N. Aegean waters, caused by the reduced dense water formation. The decreased export of deep nutrient rich N. Aegean waters result in the slight enrichment of the nutrient pool and primary production in open sea areas [5].
{"title":"Climatic and Eutrophication Effects on the North Aegean Sea Productivity and Anchovy (Engraulis encrasicolus) Stock","authors":"T. George","doi":"10.19080/OFOAJ.2018.08.555749","DOIUrl":"https://doi.org/10.19080/OFOAJ.2018.08.555749","url":null,"abstract":"Climate change is expected to have a strong effect in the Mediterranean Sea [1]. Even though climate projections may be characterised by significant uncertainties, current climate model simulations have all indicated a significant warming in the Mediterranean Sea [2-4]. An increase of sea surface temperature is expected due to global warming, while decreased precipitation and river runoff might potentially result in an increase of salinity with an opposite effect on stratification, particularly in coastal river influenced areas. An increase of stratification may reduce the productivity through reduced enrichment of euphotic zone with deep-water nutrients. On the other hand, increased stratification may influence the North Aegean circulation that is dominated by the Black Sea Water (BSW) pathways and Levantine water inflow Figure 1, as well as the thermohaline circulation that is related to the N. Aegean nutrient balance. In particular, increasing stratification results in a weakened thermohaline circulation characterised by decreased Levantine water inflow and southward export of deep N. Aegean waters, caused by the reduced dense water formation. The decreased export of deep nutrient rich N. Aegean waters result in the slight enrichment of the nutrient pool and primary production in open sea areas [5].","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130422884","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 : 2019-01-11DOI: 10.19080/OFOAJ.2019.08.555748
T. George
Modelling approaches in marine science is a controversial issue as no model is, or can be, a perfect representation of nature. Models can provide useful information for the dynamics of ecosystems and inform us about the likely consequences of human activities in fisheries and aquaculture. Applying a suite of dynamic models can be valuable predictive tools for modelling hazards transmission in fisheries and aquaculture activities in the Mediterranean Sea. These should include a. A low trophic level ecosystem model and sub-models to describe the ecosystem functioning of the sea for the background physical information and a biogeochemical sub-model which simulates functional groups. b. A pelagic fish individual-based model (IBM) to describe the bio-accumulation of chemical and biological hazards. c. An aquaculture integrated model, a mass balance model, to calculate the input of effluents into the environment as a result of the fish farm and feeding regimes. A dynamic energy budget for cultured bivalve species bioaccumulation heavy metals algal blooms. These dynamic models can contribute to develop and/or improve systems ensuring process efficacy and validation for hazard control by identifying “hot spot” zones and concentrations of hazard agents above certain limits, improve the effectiveness and efficiency of the controls performed by food safety Competent Authorities along the seafood chain, identify areas of hazard agents accumulation and contribute to the transparency and reliability of food safety in the Mediterranean fisheries and aquaculture production sites.
{"title":"Modelling Hazards in Fisheries and Aquaculture Activities in the Mediterranean Sea and the Risk of their Transmission and Dispersion. Is it Feasible?","authors":"T. George","doi":"10.19080/OFOAJ.2019.08.555748","DOIUrl":"https://doi.org/10.19080/OFOAJ.2019.08.555748","url":null,"abstract":"Modelling approaches in marine science is a controversial issue as no model is, or can be, a perfect representation of nature. Models can provide useful information for the dynamics of ecosystems and inform us about the likely consequences of human activities in fisheries and aquaculture. Applying a suite of dynamic models can be valuable predictive tools for modelling hazards transmission in fisheries and aquaculture activities in the Mediterranean Sea. These should include a. A low trophic level ecosystem model and sub-models to describe the ecosystem functioning of the sea for the background physical information and a biogeochemical sub-model which simulates functional groups. b. A pelagic fish individual-based model (IBM) to describe the bio-accumulation of chemical and biological hazards. c. An aquaculture integrated model, a mass balance model, to calculate the input of effluents into the environment as a result of the fish farm and feeding regimes. A dynamic energy budget for cultured bivalve species bioaccumulation heavy metals algal blooms. These dynamic models can contribute to develop and/or improve systems ensuring process efficacy and validation for hazard control by identifying “hot spot” zones and concentrations of hazard agents above certain limits, improve the effectiveness and efficiency of the controls performed by food safety Competent Authorities along the seafood chain, identify areas of hazard agents accumulation and contribute to the transparency and reliability of food safety in the Mediterranean fisheries and aquaculture production sites.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115927372","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 : 2018-12-25DOI: 10.19080/ofoaj.2019.09.555752
T. G.
{"title":"Modelling the Marine Microplastic Distribution from Municipal Wastewater in Saronikos Gulf (E. Mediterranean)","authors":"T. G.","doi":"10.19080/ofoaj.2019.09.555752","DOIUrl":"https://doi.org/10.19080/ofoaj.2019.09.555752","url":null,"abstract":"","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121871612","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 : 2018-12-25DOI: 10.19080/OFOAJ.2018.08.555751
Min-je Song
The low-cost and highly-reliable underwater acoustic network is an effective means of monitoring the marine environment, detecting seabed resources, searching in marine rescue operations, etc. [1,2]. There are many acoustic field effects distributed in the Pacific, Atlantic, Indian Ocean, etc., including convergence zones, shadow zones, deep sea acoustic channels and so on. The different sensor nodes of the network may be deployed in different acoustic field zones while adopting suitable working modes; for example, sensor nodes deployed in convergence zones adopt the “convergence zone working mode”, while those deployed in the deep-sea acoustic channels adopt the “deep sea acoustic waveguide working mode”. With the increase in the bandwidth and rate of underwater communication, it has become possible to carry out the combined processing of the acoustic signals of distributed nodes. Therefore, achieving processing gain of multi-field coherence and correlation through combined processing of different sensor node signals will become a new research direction.
{"title":"A New Research Direction: Underwater Acoustic Signal Combined Processing Based on Multi-Field Coherence","authors":"Min-je Song","doi":"10.19080/OFOAJ.2018.08.555751","DOIUrl":"https://doi.org/10.19080/OFOAJ.2018.08.555751","url":null,"abstract":"The low-cost and highly-reliable underwater acoustic network is an effective means of monitoring the marine environment, detecting seabed resources, searching in marine rescue operations, etc. [1,2]. There are many acoustic field effects distributed in the Pacific, Atlantic, Indian Ocean, etc., including convergence zones, shadow zones, deep sea acoustic channels and so on. The different sensor nodes of the network may be deployed in different acoustic field zones while adopting suitable working modes; for example, sensor nodes deployed in convergence zones adopt the “convergence zone working mode”, while those deployed in the deep-sea acoustic channels adopt the “deep sea acoustic waveguide working mode”. With the increase in the bandwidth and rate of underwater communication, it has become possible to carry out the combined processing of the acoustic signals of distributed nodes. Therefore, achieving processing gain of multi-field coherence and correlation through combined processing of different sensor node signals will become a new research direction.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114814255","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 : 2018-12-17DOI: 10.19080/ofoaj.2018.08.555747
S. Munjpara
{"title":"Distribution of Coastal and Marine Herpetofauna in the Gulf of Kachchh, Gujarat, India","authors":"S. Munjpara","doi":"10.19080/ofoaj.2018.08.555747","DOIUrl":"https://doi.org/10.19080/ofoaj.2018.08.555747","url":null,"abstract":"","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130597187","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 : 2018-12-11DOI: 10.19080/ofoaj.2018.08.555746
Mukhtar A. Khan
{"title":"Histidine Requirement of Cultivable Fish Species: A Review","authors":"Mukhtar A. Khan","doi":"10.19080/ofoaj.2018.08.555746","DOIUrl":"https://doi.org/10.19080/ofoaj.2018.08.555746","url":null,"abstract":"","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121345444","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 : 2018-12-05DOI: 10.19080/ofoaj.2018.08.555745
Nwamba Helen O
The toxicity of dichlorvos (18 -20 mg/L) on Clarias gariepinus juveniles (mean weight 41.6±1.2(g) and mean length 18.5±2.5 (cm) was investigated in the present study using static bioassays over a period of 96 hours. The determined 96 hours LC 50 of the exposed fishes was 17.21mg/L with lower and upper confidence limits of 15.78–18.19mg/L respectively. When the fishes were exposed there was strong evidence of stress responses characterised by hyperactive swimming with subsequent erratic with jerky movements before death which increases with time and concentration of exposure. The quality of water investigated in this study showed no change in dissolved oxygen, pH and temperature. The hepatosomatic indices (HSI) and condition factors (K) which are stress indices due to environmental pollutants decreased within 15 days of exposure and increase in concentration of dichlorvos indicating that it has detrimental effect on the liver of exposed fish with time.
{"title":"The Impact of Dichlorvos -Pesticide on African Catfish Clarias Gariepinus","authors":"Nwamba Helen O","doi":"10.19080/ofoaj.2018.08.555745","DOIUrl":"https://doi.org/10.19080/ofoaj.2018.08.555745","url":null,"abstract":"The toxicity of dichlorvos (18 -20 mg/L) on Clarias gariepinus juveniles (mean weight 41.6±1.2(g) and mean length 18.5±2.5 (cm) was investigated in the present study using static bioassays over a period of 96 hours. The determined 96 hours LC 50 of the exposed fishes was 17.21mg/L with lower and upper confidence limits of 15.78–18.19mg/L respectively. When the fishes were exposed there was strong evidence of stress responses characterised by hyperactive swimming with subsequent erratic with jerky movements before death which increases with time and concentration of exposure. The quality of water investigated in this study showed no change in dissolved oxygen, pH and temperature. The hepatosomatic indices (HSI) and condition factors (K) which are stress indices due to environmental pollutants decreased within 15 days of exposure and increase in concentration of dichlorvos indicating that it has detrimental effect on the liver of exposed fish with time.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130226524","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 : 2018-10-26DOI: 10.19080/ofoaj.2018.08.555743
Xing‐Er Ye
Jade perch (Scortum barcoo), also known as Barcoo grunter, is a fish species belonging to thegenus Scortum, the family Terapontidae and the order Perciformes. It originates from the Barcoo River of the Lake Eyre basin in central Australia and was introduced in China in 2001 [1]. The flesh of jade perch is firm and slightly flaky, sweet and succulent, without intermuscular bones, and isrich in nutrients, especially, highly unsaturated fatty acids. A study conducted by the Australian Common wealth Scientific and Industrial Research Organization (CSIRO) in 1998 indicated that among 200 sea food species tested, jade perch contained the highest level of omega-3, which was approximately 3-fold that in Atlantic salmon and silver bass. Jade perch grow extremely fast andare highly suited for aquaculture in areas with a moderate subtropical to tropical climate. Under artificial aquaculture conditions, they can grow to food size in 6-10 months on a formulated diet. Recently, there is an increasing interest for species diversification to support the development of sustainable aquaculture. Fast-growing jade perch, which can be stocked at high densities in recirculating aquaculture systems (RAS) and feeds on grow-out diets with very low levels offishmeal and fish oil, is a promising candidate for aquaculture [2,3]. Currently, this species is being farmed in both intensive ponds and recirlulating systems not only in Australian, but also in China, Malaysia, even in Belgium [4-6].Since the introduction of jade perch in China, domestic researchers have conducted several studies on the breeding and nutrition of this species. Chen et al. [1,7] studied the artificial
{"title":"Biological Characteristics of Jade Perch (Scortum Barcoo)","authors":"Xing‐Er Ye","doi":"10.19080/ofoaj.2018.08.555743","DOIUrl":"https://doi.org/10.19080/ofoaj.2018.08.555743","url":null,"abstract":"Jade perch (Scortum barcoo), also known as Barcoo grunter, is a fish species belonging to thegenus Scortum, the family Terapontidae and the order Perciformes. It originates from the Barcoo River of the Lake Eyre basin in central Australia and was introduced in China in 2001 [1]. The flesh of jade perch is firm and slightly flaky, sweet and succulent, without intermuscular bones, and isrich in nutrients, especially, highly unsaturated fatty acids. A study conducted by the Australian Common wealth Scientific and Industrial Research Organization (CSIRO) in 1998 indicated that among 200 sea food species tested, jade perch contained the highest level of omega-3, which was approximately 3-fold that in Atlantic salmon and silver bass. Jade perch grow extremely fast andare highly suited for aquaculture in areas with a moderate subtropical to tropical climate. Under artificial aquaculture conditions, they can grow to food size in 6-10 months on a formulated diet. Recently, there is an increasing interest for species diversification to support the development of sustainable aquaculture. Fast-growing jade perch, which can be stocked at high densities in recirculating aquaculture systems (RAS) and feeds on grow-out diets with very low levels offishmeal and fish oil, is a promising candidate for aquaculture [2,3]. Currently, this species is being farmed in both intensive ponds and recirlulating systems not only in Australian, but also in China, Malaysia, even in Belgium [4-6].Since the introduction of jade perch in China, domestic researchers have conducted several studies on the breeding and nutrition of this species. Chen et al. [1,7] studied the artificial","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"293 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113968951","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 : 2018-10-24DOI: 10.19080/ofoaj.2018.08.555741
Anurag Protim Das
{"title":"Aqua Ecotourism as Conservatory Mega Tool for Depensatory Fish Germplasm and Employment Generation","authors":"Anurag Protim Das","doi":"10.19080/ofoaj.2018.08.555741","DOIUrl":"https://doi.org/10.19080/ofoaj.2018.08.555741","url":null,"abstract":"","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114932626","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}
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