Pub Date : 2020-10-22DOI: 10.19080/OFOAJ.2020.12.555845
Yasar N. Kavil, Radwan K. Al-Farawati, A. Turki
The very recent pandemic issue, COVID-19 has made a huge impact in all the field irrespective of the nations. The issue has not resolved yet and the scientific world is trying to discover the vaccine against COVID-19. The lock down effect of this pandemic issue has made a small-time scale positive impacts in the environment by reducing the anthropogenic pollution. However, the economy of each country has declined drasti- cally even in the developed nations. In some countries, maritime shipping has seen COVID-19-associated declines in activity of up to 30 percent. In China and West Africa, lockdowns and decreased demand for seafood have seen fishing activity dropping by as much as 80 percent. Entire na - tions dependent on tourism related to oceans and beaches have closed their borders. These changes have made a huge impact on blue economy and the small-scale fishing industry. The use of mask is compelled to everyone, which is rather a necessity, but improper waste management will deteriorate the environment badly. Due to the unprofessional disposal of huge quantities of mask to the environment from various sources may end up in the marine environment and negatively impact the marine ecosystem as well.
{"title":"Vulnerability of the Ocean by the Impact of Pandemic COVID-19","authors":"Yasar N. Kavil, Radwan K. Al-Farawati, A. Turki","doi":"10.19080/OFOAJ.2020.12.555845","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555845","url":null,"abstract":"The very recent pandemic issue, COVID-19 has made a huge impact in all the field irrespective of the nations. The issue has not resolved yet and the scientific world is trying to discover the vaccine against COVID-19. The lock down effect of this pandemic issue has made a small-time scale positive impacts in the environment by reducing the anthropogenic pollution. However, the economy of each country has declined drasti- cally even in the developed nations. In some countries, maritime shipping has seen COVID-19-associated declines in activity of up to 30 percent. In China and West Africa, lockdowns and decreased demand for seafood have seen fishing activity dropping by as much as 80 percent. Entire na - tions dependent on tourism related to oceans and beaches have closed their borders. These changes have made a huge impact on blue economy and the small-scale fishing industry. The use of mask is compelled to everyone, which is rather a necessity, but improper waste management will deteriorate the environment badly. Due to the unprofessional disposal of huge quantities of mask to the environment from various sources may end up in the marine environment and negatively impact the marine ecosystem as well.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114009679","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 : 2020-10-19DOI: 10.19080/OFOAJ.2020.12.555844
S. El-Zaeem
The present study was conducted to evaluate the heavy metals profile in liver and muscle tissues of Nile tilapia at the end of the production cycle. To determine the concentration of 10 heavy metals in liver and muscle tissues of Nile tilapia ( Oreochromis niloticus ) cultured in natural and tap water, the samples of fish cultured for ten months were randomly collected and analyzed for Cadmium, Zinc, Lead, Copper, Manganese, Iron, Nickel, Chromium, Mercury, and Arsenate by Spectrophotometric method. The results revealed that the concentrations of heavy metals in fish samples collected from natural water were higher than that of samples collected from tap water. This concluded that, the concentrations of heavy metals in liver and muscle tissues of Nile tilapia reflect their concentrations in culture water and confirm its possibility to be an aquatic friendly environment.
{"title":"Heavy Metals Profile Assessment in the Liver and Muscle Tissues of Nile Tilapia at The End of Production Cycle","authors":"S. El-Zaeem","doi":"10.19080/OFOAJ.2020.12.555844","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555844","url":null,"abstract":"The present study was conducted to evaluate the heavy metals profile in liver and muscle tissues of Nile tilapia at the end of the production cycle. To determine the concentration of 10 heavy metals in liver and muscle tissues of Nile tilapia ( Oreochromis niloticus ) cultured in natural and tap water, the samples of fish cultured for ten months were randomly collected and analyzed for Cadmium, Zinc, Lead, Copper, Manganese, Iron, Nickel, Chromium, Mercury, and Arsenate by Spectrophotometric method. The results revealed that the concentrations of heavy metals in fish samples collected from natural water were higher than that of samples collected from tap water. This concluded that, the concentrations of heavy metals in liver and muscle tissues of Nile tilapia reflect their concentrations in culture water and confirm its possibility to be an aquatic friendly environment.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127242298","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 : 2020-10-16DOI: 10.19080/OFOAJ.2020.12.555843
Axel Holmberg
rev-Abstract According to the FAO, a fishery is typically defined in terms of the “people involved, species or type of fish, area of water or seabed, method of fishing, class of boats, purpose of the activities or a combination of the foregoing features”. A fishery may involve the capture of wild fish or raising fish through fish farming or aquaculture. Directly or indirectly, the livelihood of over 500 million people in developing countries depends on fisheries and aquaculture. Recent work indicates that ocean currents may have a considerable impact upon the productivity of fisheries, both coastal and inland. In this article, we consider a more postmodern approach to fishery management to reflect the impact of such currents and suggest a movement towards more esoteric methods of fishery management.
{"title":"Fisheries and Ocean Currents: A Postmodern Approach","authors":"Axel Holmberg","doi":"10.19080/OFOAJ.2020.12.555843","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555843","url":null,"abstract":"rev-Abstract According to the FAO, a fishery is typically defined in terms of the “people involved, species or type of fish, area of water or seabed, method of fishing, class of boats, purpose of the activities or a combination of the foregoing features”. A fishery may involve the capture of wild fish or raising fish through fish farming or aquaculture. Directly or indirectly, the livelihood of over 500 million people in developing countries depends on fisheries and aquaculture. Recent work indicates that ocean currents may have a considerable impact upon the productivity of fisheries, both coastal and inland. In this article, we consider a more postmodern approach to fishery management to reflect the impact of such currents and suggest a movement towards more esoteric methods of fishery management.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"16 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114044620","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 : 2020-10-07DOI: 10.19080/OFOAJ.2020.12.555842
T. N. Trung
The marine and atmospheric model’s accuracy mainly depends on the quality of the initial and boundary conditions, numeric, and physics of the model, and on the variation of the phenomena (e.g., chaos of atmosphere) [1-3]. In the wave prediction problem, the wave field is mainly calculated based on the wave–action balance equations (e.g., the WAVEWATCH III, simulating waves nearshore SWAN, wave model WAM) with the given initial and boundary conditions. There are two types of boundary conditions, including surface and open boundaries. The surface boundary is a field of meteorological factors (wind and pressure fields) extracted from meteorological forecasting models. For the open boundaries, the wave direction, period, wave height or wave spectrum from models or observations can be used at a limited area, such as the South China Sea East Sea of Vietnam (SCS). There are two ways to determine the initial condition for the wave model: (i) The initial condition is the state of the calm sea surface until the actual state of the sea surface is reached to continue calculating the forecast (for example, in the SCS, this process usually takes 48 to 72 h); and (ii) using the analysis wave field as the initial condition. This initial field can be either the observational data or the wave field from the previous forecast (the hot start running).
{"title":"A Case Study of Wave Forecast Over South China Sea Using SWAN Model and Ensemble Kalman Filter Method","authors":"T. N. Trung","doi":"10.19080/OFOAJ.2020.12.555842","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555842","url":null,"abstract":"The marine and atmospheric model’s accuracy mainly depends on the quality of the initial and boundary conditions, numeric, and physics of the model, and on the variation of the phenomena (e.g., chaos of atmosphere) [1-3]. In the wave prediction problem, the wave field is mainly calculated based on the wave–action balance equations (e.g., the WAVEWATCH III, simulating waves nearshore SWAN, wave model WAM) with the given initial and boundary conditions. There are two types of boundary conditions, including surface and open boundaries. The surface boundary is a field of meteorological factors (wind and pressure fields) extracted from meteorological forecasting models. For the open boundaries, the wave direction, period, wave height or wave spectrum from models or observations can be used at a limited area, such as the South China Sea East Sea of Vietnam (SCS). There are two ways to determine the initial condition for the wave model: (i) The initial condition is the state of the calm sea surface until the actual state of the sea surface is reached to continue calculating the forecast (for example, in the SCS, this process usually takes 48 to 72 h); and (ii) using the analysis wave field as the initial condition. This initial field can be either the observational data or the wave field from the previous forecast (the hot start running).","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116000752","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 : 2020-10-01DOI: 10.19080/OFOAJ.2020.12.555841
Jega Ibrahim Shehu
High production capacity of members of Bagridae family in the wild has prompted many attempts by fisheries scientists to culture them. Chrysichthys nigrodigitatus have been cultured along with Tilapia melanoplura and Cyprinus carpio in Buguma, Nigeria, with encouraging results [1]. Bagrus docmac have been cultured with Tilapia in Uganda and being carnivorous, they were found to be effective in controlling Tilapia population. Many catfishes do not readily breed under captivity because they are not able to exhibit their natural spawning behavior in artificial ponds and this constitutes a limiting factor to their culture and mass production [2]. Bagrus bayad, also called bayad with local (Hausa) name Shambani is a member of Bagridae family which are commonly referred to as a naked catfish. They are commercially important species found in Nigeria fresh waters especially in Rivers and Lakes such as Niger, Kaduna, Benue, Lake Chad, and other inland waters [3]. The length-weight relationship (LWR) of fishes are important in fisheries biology and the study of natural history of fishes because they allow the estimation of the average weight of fish of a given length group by creating a mathematical relationship between them [4,5]. LWR can also be used to calculate condition indices, to compare life history and morphology of population belonging to different region and to study oncogenic allometric changes [6,7]. LWR is also an important factor in fish ecology and in the biological study of fishes, being of prime importance in parameterizing fish yield equation in stock assessment and management [8].
{"title":"Length-Weight Relationship and Spawning Season of Bagrus bayad (Forsskal, 1775) in Yamama Lake Kebbi State, Nigeria","authors":"Jega Ibrahim Shehu","doi":"10.19080/OFOAJ.2020.12.555841","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555841","url":null,"abstract":"High production capacity of members of Bagridae family in the wild has prompted many attempts by fisheries scientists to culture them. Chrysichthys nigrodigitatus have been cultured along with Tilapia melanoplura and Cyprinus carpio in Buguma, Nigeria, with encouraging results [1]. Bagrus docmac have been cultured with Tilapia in Uganda and being carnivorous, they were found to be effective in controlling Tilapia population. Many catfishes do not readily breed under captivity because they are not able to exhibit their natural spawning behavior in artificial ponds and this constitutes a limiting factor to their culture and mass production [2]. Bagrus bayad, also called bayad with local (Hausa) name Shambani is a member of Bagridae family which are commonly referred to as a naked catfish. They are commercially important species found in Nigeria fresh waters especially in Rivers and Lakes such as Niger, Kaduna, Benue, Lake Chad, and other inland waters [3]. The length-weight relationship (LWR) of fishes are important in fisheries biology and the study of natural history of fishes because they allow the estimation of the average weight of fish of a given length group by creating a mathematical relationship between them [4,5]. LWR can also be used to calculate condition indices, to compare life history and morphology of population belonging to different region and to study oncogenic allometric changes [6,7]. LWR is also an important factor in fish ecology and in the biological study of fishes, being of prime importance in parameterizing fish yield equation in stock assessment and management [8].","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130107369","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 : 2020-09-28DOI: 10.19080/OFOAJ.2020.12.555840
C. Onyemechi, C. Igboanusi, A. Ezenwa, A. Sule
The West African ship building and ship repair space is dominated by shipyards most of which are govern men t owned. However, few private owned companies have joined them recently as seen in Nigeria. This development may have arisen due to innovations by new local content regulations emerging in the region. Local content regulations demand vessels supporting the oil and gas sector in the region to be built and repaired in the region before seeking for outside shipyards, thus preserving business for local operators first before others. Good measures of developments have occurred in most West African shipyards based on local content. However, the acquisitions of basic ship building skills as well as shipyard management skills still stand as barrier to development. The implications are that most of the vessels operating in the region still go outside the region to effect repairs.
{"title":"Benchmarking Study of West Africa’s Offshore Support Ship Building and Repair Capability","authors":"C. Onyemechi, C. Igboanusi, A. Ezenwa, A. Sule","doi":"10.19080/OFOAJ.2020.12.555840","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555840","url":null,"abstract":"The West African ship building and ship repair space is dominated by shipyards most of which are govern men t owned. However, few private owned companies have joined them recently as seen in Nigeria. This development may have arisen due to innovations by new local content regulations emerging in the region. Local content regulations demand vessels supporting the oil and gas sector in the region to be built and repaired in the region before seeking for outside shipyards, thus preserving business for local operators first before others. Good measures of developments have occurred in most West African shipyards based on local content. However, the acquisitions of basic ship building skills as well as shipyard management skills still stand as barrier to development. The implications are that most of the vessels operating in the region still go outside the region to effect repairs.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133361347","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 : 2020-09-16DOI: 10.19080/OFOAJ.2020.12.555839
E. Clua, A. Abril, Clémentine Séguigne, G. Siu, Agusti Torres
The Mediterranean Sea is one of the seas most affected by the collapse of shark populations due to overfishing. Considered ‘vulnerable’ by the IUCN on a global scale, the blue shark Prionace glauca is classified as ‘Critically Endangered’ in the Mediterranean Sea. A fisheries-indepen - dent study was conducted through the implementation of 14 filming sessions, lasting between 5 and 10 days, during winter and summer seasons between July 2017 and February 2020, in semi-pelagic waters around the islands of Mallorca and Menorca (Balearic Islands, Western Mediterra- nean). Using 24-hour BRUVs, we collected 1685 hours of video that allowed us to observe 10 blue sharks, six males and four females, estimated between 1.2 and 2.5 m in total length (TL). In addition to their low abundance (average of 0.02 shark ±0,025 observed per hour), 50% of animals presented residual hook, sometimes with a nylon leader several meters long, potentially jeopardizing its survival. In addition to other threats, the frequent presence of residual hooks may contribute to a cryptic mortality of this species in relation to pelagic fisheries, calling into question the future of this species in this region of the world.
{"title":"Fisheries-Independent Evidence of Longline Fisheries Impact on the Threatened Mediterranean Blue Shark Prionace Glauca in The Waters Around the Balearic Islands (Spain)","authors":"E. Clua, A. Abril, Clémentine Séguigne, G. Siu, Agusti Torres","doi":"10.19080/OFOAJ.2020.12.555839","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555839","url":null,"abstract":"The Mediterranean Sea is one of the seas most affected by the collapse of shark populations due to overfishing. Considered ‘vulnerable’ by the IUCN on a global scale, the blue shark Prionace glauca is classified as ‘Critically Endangered’ in the Mediterranean Sea. A fisheries-indepen - dent study was conducted through the implementation of 14 filming sessions, lasting between 5 and 10 days, during winter and summer seasons between July 2017 and February 2020, in semi-pelagic waters around the islands of Mallorca and Menorca (Balearic Islands, Western Mediterra- nean). Using 24-hour BRUVs, we collected 1685 hours of video that allowed us to observe 10 blue sharks, six males and four females, estimated between 1.2 and 2.5 m in total length (TL). In addition to their low abundance (average of 0.02 shark ±0,025 observed per hour), 50% of animals presented residual hook, sometimes with a nylon leader several meters long, potentially jeopardizing its survival. In addition to other threats, the frequent presence of residual hooks may contribute to a cryptic mortality of this species in relation to pelagic fisheries, calling into question the future of this species in this region of the world.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122308757","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 : 2020-09-01DOI: 10.19080/OFOAJ.2020.12.555837
M. FonsecaE, F. DelgadoJDe, S. LimaLDa, C. BrittoEBC, P. AlmeidaM, S. VieiraK, M. AmorimR, A. BaptistaNetoJ
The assessment of pollution in poor regions remains a challenge for developing countries. Difficult access to and low availability of logistical conditions result in a lack of information on environmental quality in these regions. To provide information on heavy metals concentrations in water and sediments, samples were collected in seven sampling stations in São Marco Bay’s harbor area, seasonally, from August 2017 to September 2018. Water samples were evaluated for temperature, turbidity, salinity, Eh, oxygen content, pH, phosphorus, total organic carbons, and heavy metals. In sediment samples, heavy metals’ potentially mobilizable fractions were evaluated. In parallel, grain size, organic matter and redox potential were also analyzed. The average values of water and its physicochemical parameters revealed an unstratified environment with a great influence of ocean waters. High concentrations of metals were recorded in the water of sediment contamination. The present study suggested the high hydrodynamics and resulting coarser grain size accumulation as the cause for the relatively balanced environment conditions.
{"title":"Evaluation of Metal Pollution in Sediments and Water of Sao Marco Harbor (Maranhão, Brazil)","authors":"M. FonsecaE, F. DelgadoJDe, S. LimaLDa, C. BrittoEBC, P. AlmeidaM, S. VieiraK, M. AmorimR, A. BaptistaNetoJ","doi":"10.19080/OFOAJ.2020.12.555837","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555837","url":null,"abstract":"The assessment of pollution in poor regions remains a challenge for developing countries. Difficult access to and low availability of logistical conditions result in a lack of information on environmental quality in these regions. To provide information on heavy metals concentrations in water and sediments, samples were collected in seven sampling stations in São Marco Bay’s harbor area, seasonally, from August 2017 to September 2018. Water samples were evaluated for temperature, turbidity, salinity, Eh, oxygen content, pH, phosphorus, total organic carbons, and heavy metals. In sediment samples, heavy metals’ potentially mobilizable fractions were evaluated. In parallel, grain size, organic matter and redox potential were also analyzed. The average values of water and its physicochemical parameters revealed an unstratified environment with a great influence of ocean waters. High concentrations of metals were recorded in the water of sediment contamination. The present study suggested the high hydrodynamics and resulting coarser grain size accumulation as the cause for the relatively balanced environment conditions.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117311162","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 : 2020-08-13DOI: 10.19080/OFOAJ.2020.12.555835
Shannon Jones
Although recent attention has been given to accelerated sea level rise (SLR), anthropogenic activity disrupts incoming flow and sediment critical to maintaining the mangrove ecosystem. Deforestation and conversion to agriculture and urban landscapes can increase sedimentation rates of mangroves. Excess sedimentation of mangroves causes upland species invasions, aerial root burial, and tree die-off. Conversely, dams and diversion of flow decrease the influx of sediment into mangroves and limits the effectiveness of mangroves to respond to SLR. Predicted increases in precipitation, erosion, and flooding due to climate change further exacerbates these issues, yet current hydrologic models do not fully incorporate the interrelations and amplification of these processes from anthropogenic activity and climate change. Despite significant literature of fluvial, coastal, and marine processes and their effects on mangroves, there is limited understanding of the complex integrations and interactions between these processes and their effect on mangrove sedimentation. Although improving, hydrometeorological monitoring is often spatially and temporally limited, therefore extracting mangrove sediment records can provide information on sediment accretion rates in relation to SLR. Additionally, hydrologic models, created primarily by and for temperate environments, often do not effectively model tropical processes, seasonal effects of rainfall, or compound fluvial and coastal flooding from tropical cyclones. The lack of integrated hydrologic model - ling and monitoring leaves local communities ill-prepared to make effective management decisions. Globally, to make significant advancement towards effective mangrove management, upstream river management is needed in addition to limitations on mass tourism, deforestation, and rapid development in areas hydrologically connected to the mangroves.
{"title":"From Source to Sink: How Linking Upstream Fluvial Processes to Mangrove Sedimentation Can Improve Mangrove Management Strategies","authors":"Shannon Jones","doi":"10.19080/OFOAJ.2020.12.555835","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555835","url":null,"abstract":"Although recent attention has been given to accelerated sea level rise (SLR), anthropogenic activity disrupts incoming flow and sediment critical to maintaining the mangrove ecosystem. Deforestation and conversion to agriculture and urban landscapes can increase sedimentation rates of mangroves. Excess sedimentation of mangroves causes upland species invasions, aerial root burial, and tree die-off. Conversely, dams and diversion of flow decrease the influx of sediment into mangroves and limits the effectiveness of mangroves to respond to SLR. Predicted increases in precipitation, erosion, and flooding due to climate change further exacerbates these issues, yet current hydrologic models do not fully incorporate the interrelations and amplification of these processes from anthropogenic activity and climate change. Despite significant literature of fluvial, coastal, and marine processes and their effects on mangroves, there is limited understanding of the complex integrations and interactions between these processes and their effect on mangrove sedimentation. Although improving, hydrometeorological monitoring is often spatially and temporally limited, therefore extracting mangrove sediment records can provide information on sediment accretion rates in relation to SLR. Additionally, hydrologic models, created primarily by and for temperate environments, often do not effectively model tropical processes, seasonal effects of rainfall, or compound fluvial and coastal flooding from tropical cyclones. The lack of integrated hydrologic model - ling and monitoring leaves local communities ill-prepared to make effective management decisions. Globally, to make significant advancement towards effective mangrove management, upstream river management is needed in addition to limitations on mass tourism, deforestation, and rapid development in areas hydrologically connected to the mangroves.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115208739","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 : 2020-08-10DOI: 10.19080/OFOAJ.2020.12.555834
C. González-Gándara, Pastor Alberto Escarcega-Quiroga, Seth Donovan Flores-Serrano
Knowledge of the lionfish’s diet composition on a regional scale is essential to assess the impact that an increase in population density can have on native populations. This paper documents for the first time the diet of Pterois volitans in coral reefs of Veracruz (southwestern Gulf of Mexico). For this, 29 organisms from three reefs in northern Veracruz were analyzed. 95.2 % of the stomach contents of lionfish were repre sented by fish and 4.8 % by crustaceans. Among the most frequent species in the diet of P. volitans were: Malacoctenus triangulatus and Tigrigobius redimiculus . The results reveal that the increase in the population density of the lionfish in the region may represent a threat to the regional endemic species.
{"title":"Feeding Ecology of Pterois volitans on the Coral Reefs of Northern Veracruz, Mexico","authors":"C. González-Gándara, Pastor Alberto Escarcega-Quiroga, Seth Donovan Flores-Serrano","doi":"10.19080/OFOAJ.2020.12.555834","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555834","url":null,"abstract":"Knowledge of the lionfish’s diet composition on a regional scale is essential to assess the impact that an increase in population density can have on native populations. This paper documents for the first time the diet of Pterois volitans in coral reefs of Veracruz (southwestern Gulf of Mexico). For this, 29 organisms from three reefs in northern Veracruz were analyzed. 95.2 % of the stomach contents of lionfish were repre sented by fish and 4.8 % by crustaceans. Among the most frequent species in the diet of P. volitans were: Malacoctenus triangulatus and Tigrigobius redimiculus . The results reveal that the increase in the population density of the lionfish in the region may represent a threat to the regional endemic species.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132698330","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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