Pub Date : 2017-06-23DOI: 10.5376/IJMS.2017.07.0026
Mahesh Mohan, P. Chandini, K. P. Krishnan, V. G. Gopikrishana, K. S. Sajinkumar, M. KannanV
The presence of mercury (Hg) is increasing in Arctic region and the Arctic sea will take short time to reflect changes in atmospheric Hg levels. Hence, monitoring of mercury content in the environmental matrices of Arctic is highly significant. The present study assessed the total mercury (THg) as well as various Hg fractions in the sediments of Kongsfjorden, an Arctic Fjord in Svalbard. The Hg toxicity mainly depends on the form which occurs. Fractionation study will help to understand the different forms of Hg in sediment samples. The mean concentration of THg in sediment was 485 ng/gm dry weight. The results of fractionation indicated the mobility of Hg in the Kongsfjord sediments. The highest percentage of Hg was in fourth fraction (F4) followed by the fractions F2, F1, and F3 and final fraction (F5). The high Hg concentration in the initial fractions indicated the availability of Hg for chemical and biological transformations and transport in the Fjord. Hence potential toxic effects are possible in the system.
{"title":"Mercury Fractionation in the Sediments of Kongsfjorden, an Arctic Fjord, Svalbard","authors":"Mahesh Mohan, P. Chandini, K. P. Krishnan, V. G. Gopikrishana, K. S. Sajinkumar, M. KannanV","doi":"10.5376/IJMS.2017.07.0026","DOIUrl":"https://doi.org/10.5376/IJMS.2017.07.0026","url":null,"abstract":"The presence of mercury (Hg) is increasing in Arctic region and the Arctic sea will take short time to reflect changes in atmospheric Hg levels. Hence, monitoring of mercury content in the environmental matrices of Arctic is highly significant. The present study assessed the total mercury (THg) as well as various Hg fractions in the sediments of Kongsfjorden, an Arctic Fjord in Svalbard. The Hg toxicity mainly depends on the form which occurs. Fractionation study will help to understand the different forms of Hg in sediment samples. The mean concentration of THg in sediment was 485 ng/gm dry weight. The results of fractionation indicated the mobility of Hg in the Kongsfjord sediments. The highest percentage of Hg was in fourth fraction (F4) followed by the fractions F2, F1, and F3 and final fraction (F5). The high Hg concentration in the initial fractions indicated the availability of Hg for chemical and biological transformations and transport in the Fjord. Hence potential toxic effects are possible in the system.","PeriodicalId":22529,"journal":{"name":"The international journal of marine science","volume":"107 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90447665","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 : 2017-06-22DOI: 10.5376/IJMS.2017.07.0025
H. Halim
Gili-Trawangan is one of three of the most popular tourist destination in Lombok. It’s located lined with 3 other destinations. Based on the comparison of three approaches derived of coastal-ecotourism, it is found that the impact of tourism is determined by the relationship and interaction between the economic-natural, environment, socio-cultural variables, and sub-systems. There are three main issues that should be done to improve coastal ecotourism performance in Gili-Trawangan: sustainable living patterns, conserving coastal community resources, and enhancing regional economic-development. To address environmental concerns, it’s needed to maintain environmental cleanliness and minimum of building sites. Besides, it is necessary to conserve a mangrove, sea grass beds, coral reefs, and marine fish as well as ecotourism-fishing. It can be used as a marine fishing tourism too. The effort would increase the number of tourist visits and it’s also increase the income of the community and local government.
{"title":"Scrutinizing Coastal Ecotourism in Gili Trawangan, Indonesia","authors":"H. Halim","doi":"10.5376/IJMS.2017.07.0025","DOIUrl":"https://doi.org/10.5376/IJMS.2017.07.0025","url":null,"abstract":"Gili-Trawangan is one of three of the most popular tourist destination in Lombok. It’s located lined with 3 other destinations. Based on the comparison of three approaches derived of coastal-ecotourism, it is found that the impact of tourism is determined by the relationship and interaction between the economic-natural, environment, socio-cultural variables, and sub-systems. There are three main issues that should be done to improve coastal ecotourism performance in Gili-Trawangan: sustainable living patterns, conserving coastal community resources, and enhancing regional economic-development. To address environmental concerns, it’s needed to maintain environmental cleanliness and minimum of building sites. Besides, it is necessary to conserve a mangrove, sea grass beds, coral reefs, and marine fish as well as ecotourism-fishing. It can be used as a marine fishing tourism too. The effort would increase the number of tourist visits and it’s also increase the income of the community and local government.","PeriodicalId":22529,"journal":{"name":"The international journal of marine science","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81178188","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}
Samar Saad Mohamed Seoud, V. Zaki, G. Ahmed, Nevien K. Abd El-Khalek
Amyloodinium ocellatum, a dinoflagellate which causes one of the most serious diseases of warm water marine aquaculture. The parasite produces a powdery or velvety appearance on infected fish, and the resulting disease is commonly referred to as “marine velvet,” velvet disease, or Amyloodiniosis. The organism is a dinoflagellate ectoparasite and has been reported in a wide range of marine and estuarine fish. It is one of a very few organisms that can infect both teleosts and elasmobranchs [2]. This makes it a concern for public aquaria. This ectoparasite can be found on gills and skin (body and fins) of host fish. It can cause devastating disease and mortality because the organism is able to reproduce quickly when fish are crowded, especially in closed systems. This parasite has a broad host and geographic range, causing fish mortalities in tropical and temperate environments. Rapid spread of the parasite and high mortality are common in cultured fish if the organism is not recognized and treated early in the course of an outbreak. One of the most important of the ectoparasitic protozoa is in this respect, the present study was aimed to investigate the occurrence of Amyloodiniosis among cultured European seabass (Dicentrarchus labrax L.; Moronidae; Perciformes) fishes. This work was carried out on 1065 European seabass fishes of different life stages (546 fry-222 fingerling and 78 adults) which were collected in different seasons of the year. Cultured fish were collected from different marine farms in Egypt during the period from April 2015 to April 2016 and subjected to full clinical parasitological and histopathological examination studying the environmental stressors surrounding examined fish and their association with A.ocellatum infestation Study the ecological factors affects Amyloodiniosis. As well as examining the antiseptic activity of hydrogen peroxide against the ectoparasitic protozoan A.ocellatum as a trial for treatment.
{"title":"Studies on Amyloodinium Infestation in European Seabass ( Dicentrarchus labrax. ) Fishes with Special Reference for Treatment","authors":"Samar Saad Mohamed Seoud, V. Zaki, G. Ahmed, Nevien K. Abd El-Khalek","doi":"10.12691/MARINE-5-1-3","DOIUrl":"https://doi.org/10.12691/MARINE-5-1-3","url":null,"abstract":"Amyloodinium ocellatum, a dinoflagellate which causes one of the most serious diseases of warm water marine aquaculture. The parasite produces a powdery or velvety appearance on infected fish, and the resulting disease is commonly referred to as “marine velvet,” velvet disease, or Amyloodiniosis. The organism is a dinoflagellate ectoparasite and has been reported in a wide range of marine and estuarine fish. It is one of a very few organisms that can infect both teleosts and elasmobranchs [2]. This makes it a concern for public aquaria. This ectoparasite can be found on gills and skin (body and fins) of host fish. It can cause devastating disease and mortality because the organism is able to reproduce quickly when fish are crowded, especially in closed systems. This parasite has a broad host and geographic range, causing fish mortalities in tropical and temperate environments. Rapid spread of the parasite and high mortality are common in cultured fish if the organism is not recognized and treated early in the course of an outbreak. One of the most important of the ectoparasitic protozoa is in this respect, the present study was aimed to investigate the occurrence of Amyloodiniosis among cultured European seabass (Dicentrarchus labrax L.; Moronidae; Perciformes) fishes. This work was carried out on 1065 European seabass fishes of different life stages (546 fry-222 fingerling and 78 adults) which were collected in different seasons of the year. Cultured fish were collected from different marine farms in Egypt during the period from April 2015 to April 2016 and subjected to full clinical parasitological and histopathological examination studying the environmental stressors surrounding examined fish and their association with A.ocellatum infestation Study the ecological factors affects Amyloodiniosis. As well as examining the antiseptic activity of hydrogen peroxide against the ectoparasitic protozoan A.ocellatum as a trial for treatment.","PeriodicalId":22529,"journal":{"name":"The international journal of marine science","volume":"54 1","pages":"18-33"},"PeriodicalIF":0.0,"publicationDate":"2017-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80299837","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 : 2017-06-15DOI: 10.5376/IJMS.2017.07.0018
Asaad M. R. Al-Taee, F. N. Al-Kanany, Satar A. Gmais, Hassan A.N. Alshawi
Four bacterial strains capable of using crude oil as the sole carbon source were isolated from Khor Al-Zubair channel, southern Iraq. The isolates were identified as Vibrio vulnificus ; Brevundimonas diminuta/vesicularis ; Ochrobactrum anthropic and Sphingomonas paucimobilis by the Vitek II system. The bacteria grew aerobically in liquid culture containing four concentrations (0.25%, 0.5%, 1% and 2% v/v) of crude oil at 30ᵒC for a seven day period. The components of crude oil degraded by the isFolates were determined by capillary gas chromatography. Vibrio vulnificus was the most effective bacteria to degrade crude oil, especially in concentration 2% (93.05%). Meanwhile, Ochrobactrum anthropi was the lowest (9.63%) in concentration 0.25%.
{"title":"Biodegradation of Aliphatic Hydrocarbons by Bacteria Isolated from Khor Al-Zubair Channel, Southern Iraq","authors":"Asaad M. R. Al-Taee, F. N. Al-Kanany, Satar A. Gmais, Hassan A.N. Alshawi","doi":"10.5376/IJMS.2017.07.0018","DOIUrl":"https://doi.org/10.5376/IJMS.2017.07.0018","url":null,"abstract":"Four bacterial strains capable of using crude oil as the sole carbon source were isolated from Khor Al-Zubair channel, southern Iraq. The isolates were identified as Vibrio vulnificus ; Brevundimonas diminuta/vesicularis ; Ochrobactrum anthropic and Sphingomonas paucimobilis by the Vitek II system. The bacteria grew aerobically in liquid culture containing four concentrations (0.25%, 0.5%, 1% and 2% v/v) of crude oil at 30ᵒC for a seven day period. The components of crude oil degraded by the isFolates were determined by capillary gas chromatography. Vibrio vulnificus was the most effective bacteria to degrade crude oil, especially in concentration 2% (93.05%). Meanwhile, Ochrobactrum anthropi was the lowest (9.63%) in concentration 0.25%.","PeriodicalId":22529,"journal":{"name":"The international journal of marine science","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74572680","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 : 2017-06-13DOI: 10.5376/IJMS.2017.07.0023
M. El-Metwally, Amany G. Madkour, R. Fouad, L. Mohamedein, Hamada A. Nour Eldine, M. Dar, K. El-Moselhy
The concentrations and distributions of the leachable heavy metals (Co, Cu, Zn, Ni, Cd, Mn, Pb and Fe) were investigated in the fine sediment fractions (O3, O4 and O5) collected from the Egyptian Red Sea Harbors at Hurghada, Safaga and Qusier. The three fractions were the essential heavy metal carriers and were formed the main constituent of the marine sediments with percentages exceed 50% at the most of studied stations. The accumulation sequence of the metal carriers at Hurghada was O5 >O4> O3, however at Safaga and Qusier, it was O5 >O3> O4. Fe and Mn showed the highest values at Safaga (7483 and 306.3 µg/g, respectively) due to the high terrigenous inputs from the different shipment operations and the wastewater effluents. The highest values of Zn, Cu, Ni and Pb were recorded in the marine area off Hurghada ports (330.38, 298.40, 91.4 and 101.02 µg/g, respectively), which attributed to the coastal based activities at Hurghada shipyard and fishing berth. Meanwhile the highest levels of Co and Cd were observed at the old port of Qusier (5.85 and 4.19 µg/g, respectively). The correlation coefficient and principal component analysis (PCA) indicated the anthropogenic sources of Cu, Zn and Pb in front of Hurghada ports. Based on the SQGs, the concentrations of Co, Fe, Mn, Zn and Pb were below the lowest effect level (LEL) with limited severity for Cd, Cu and Ni at Hurghada shipyard but lower than the sever effect level (SEL). The principal component analysis (PCA) showed correlations between Fe, Mn and partially Cd as well as the strong positive correlations for Cu with Zn and Pb suggesting common source of contamination that is likely originated from the terrestrial materials associated with the shipping of ores and coastal activities. According to the Enrichment factor (EF) and the geo-accumulation factor (Igeo), Cu and Pb were the highest enriched elements due to anthropogenic contamination; consequently the studied ports were classified as moderately to highly contaminated by Cu and Pb at Hurghada.
{"title":"Assessment the Leachable Heavy Metals and Ecological Risk in the Surface Sediments inside the Red Sea Ports of Egypt","authors":"M. El-Metwally, Amany G. Madkour, R. Fouad, L. Mohamedein, Hamada A. Nour Eldine, M. Dar, K. El-Moselhy","doi":"10.5376/IJMS.2017.07.0023","DOIUrl":"https://doi.org/10.5376/IJMS.2017.07.0023","url":null,"abstract":"The concentrations and distributions of the leachable heavy metals (Co, Cu, Zn, Ni, Cd, Mn, Pb and Fe) were investigated in the fine sediment fractions (O3, O4 and O5) collected from the Egyptian Red Sea Harbors at Hurghada, Safaga and Qusier. The three fractions were the essential heavy metal carriers and were formed the main constituent of the marine sediments with percentages exceed 50% at the most of studied stations. The accumulation sequence of the metal carriers at Hurghada was O5 >O4> O3, however at Safaga and Qusier, it was O5 >O3> O4. Fe and Mn showed the highest values at Safaga (7483 and 306.3 µg/g, respectively) due to the high terrigenous inputs from the different shipment operations and the wastewater effluents. The highest values of Zn, Cu, Ni and Pb were recorded in the marine area off Hurghada ports (330.38, 298.40, 91.4 and 101.02 µg/g, respectively), which attributed to the coastal based activities at Hurghada shipyard and fishing berth. Meanwhile the highest levels of Co and Cd were observed at the old port of Qusier (5.85 and 4.19 µg/g, respectively). The correlation coefficient and principal component analysis (PCA) indicated the anthropogenic sources of Cu, Zn and Pb in front of Hurghada ports. Based on the SQGs, the concentrations of Co, Fe, Mn, Zn and Pb were below the lowest effect level (LEL) with limited severity for Cd, Cu and Ni at Hurghada shipyard but lower than the sever effect level (SEL). The principal component analysis (PCA) showed correlations between Fe, Mn and partially Cd as well as the strong positive correlations for Cu with Zn and Pb suggesting common source of contamination that is likely originated from the terrestrial materials associated with the shipping of ores and coastal activities. According to the Enrichment factor (EF) and the geo-accumulation factor (Igeo), Cu and Pb were the highest enriched elements due to anthropogenic contamination; consequently the studied ports were classified as moderately to highly contaminated by Cu and Pb at Hurghada.","PeriodicalId":22529,"journal":{"name":"The international journal of marine science","volume":"111 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89617610","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 : 2017-06-09DOI: 10.5376/IJMS.2017.07.0022
L. Bat, E. Y. Ozkan, H. B. Buyukisik, H. C. Öztekin
The spatial distribution pattern and transportation of heavy metals in sediments (up to 10 cm) were studied along Sinop peninsula of the southern Black Sea. The influences of anthropogenic metals pollution in surface sediments of Sinop Peninsula in the Black Sea were assayed by using I geo . Metal contents were significantly correlated each other. Heavy metal concentrations showed a significant relationship with Fe content, while most heavy metals were not enriched. The levels of most metals at all stations were lower than the contents indicated by the sediment quality.
{"title":"Assessment of Metal Pollution in Sediments along Sinop peninsula of the Black Sea","authors":"L. Bat, E. Y. Ozkan, H. B. Buyukisik, H. C. Öztekin","doi":"10.5376/IJMS.2017.07.0022","DOIUrl":"https://doi.org/10.5376/IJMS.2017.07.0022","url":null,"abstract":"The spatial distribution pattern and transportation of heavy metals in sediments (up to 10 cm) were studied along Sinop peninsula of the southern Black Sea. The influences of anthropogenic metals pollution in surface sediments of Sinop Peninsula in the Black Sea were assayed by using I geo . Metal contents were significantly correlated each other. Heavy metal concentrations showed a significant relationship with Fe content, while most heavy metals were not enriched. The levels of most metals at all stations were lower than the contents indicated by the sediment quality.","PeriodicalId":22529,"journal":{"name":"The international journal of marine science","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76367559","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 : 2017-06-09DOI: 10.5376/IJMS.2017.07.0021
L. Jawad, S. Mehanna, M. A. El-Regal, Yassin A. Ahmed
The asymmetry in the mass of the sagitta of the parrotfish species, Chlorurus sordidus and Hipposcarus harid collected from Hurghada, Red Sea coast of Egypt was investigated. In the present study, the weight of the difference between the weight of the sagitta from both the left and right sides was divided by average otolith mass. The results shown that the value of x in the two-species studied does not related to the length of the fish, though the value of otolith weight difference has shown a trend of increase with the fish length. The value of x was calculated to fall between -0.2 and +0.2.
{"title":"Otolith Mass Asymmetry in Two Parrotfish Species, Chlorurus sordidus (Forsskål, 1775) and Hipposcarus harid (Forsskål, 1775) from Hurghada, Red Sea Coast of Egypt","authors":"L. Jawad, S. Mehanna, M. A. El-Regal, Yassin A. Ahmed","doi":"10.5376/IJMS.2017.07.0021","DOIUrl":"https://doi.org/10.5376/IJMS.2017.07.0021","url":null,"abstract":"The asymmetry in the mass of the sagitta of the parrotfish species, Chlorurus sordidus and Hipposcarus harid collected from Hurghada, Red Sea coast of Egypt was investigated. In the present study, the weight of the difference between the weight of the sagitta from both the left and right sides was divided by average otolith mass. The results shown that the value of x in the two-species studied does not related to the length of the fish, though the value of otolith weight difference has shown a trend of increase with the fish length. The value of x was calculated to fall between -0.2 and +0.2.","PeriodicalId":22529,"journal":{"name":"The international journal of marine science","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84872498","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 : 2017-06-07DOI: 10.5376/ijms.2017.07.0020
L. Jawad, M. Ibrahim
Cases of deformities in the operculum, dorsal fin and cases of albinism, color disorder and hyperostosis were observed and examined in fish samples collected from the Jubail City, Saudi Arabia. An attempt was made in this study to find a possible relationship between these anomalies and several types of pollutants presents in the environment. The assessment of abnormalities was carried out by their diagnosis morphologically. All cases were not fatal as they occurred in adult individuals. The possible causes for such deformities as well as the suitability of this kind of study for environmental monitoring are discussed. Further studies are needed to relate specific pollutants with the observed types of deformities.
{"title":"On Some Cases of Fish Anomalies in Fishes from the Port of Jubail, Saudi Arabia, Arabian Gulf","authors":"L. Jawad, M. Ibrahim","doi":"10.5376/ijms.2017.07.0020","DOIUrl":"https://doi.org/10.5376/ijms.2017.07.0020","url":null,"abstract":"Cases of deformities in the operculum, dorsal fin and cases of albinism, color disorder and hyperostosis were observed and examined in fish samples collected from the Jubail City, Saudi Arabia. An attempt was made in this study to find a possible relationship between these anomalies and several types of pollutants presents in the environment. The assessment of abnormalities was carried out by their diagnosis morphologically. All cases were not fatal as they occurred in adult individuals. The possible causes for such deformities as well as the suitability of this kind of study for environmental monitoring are discussed. Further studies are needed to relate specific pollutants with the observed types of deformities.","PeriodicalId":22529,"journal":{"name":"The international journal of marine science","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80384552","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 : 2017-06-01DOI: 10.5376/IJMS.2017.07.0019
L. Jawad, O. Akyol, İ. Aydin
The first record of the abnormalities, saddleback syndrome and pughead is reported from common pandora Pagellus erythrinus collected from the northern Aegean Sea, Turkey. Externally, the pughead specimen was with a short neurocranium, normal jaws and mouth was closed. There are a significant osteological damages have been revealed by the radiograph of this deformed specimen. The saddleback anomaly is located in the spinous part of the dorsal fin that showed a loss of 8 spines. In addition, few scales of the lateral line were deformed. The radiograph image showed that the whole 8 spines and their supporting pterygiophores were missing. These abnormalities have been considered as an important indicator of environmentally induced stress to the wild fishes. Hence, the present finding highlights the need for closer monitoring of the marine environment and for the identification of the specific factor that causes these abnormalities.
{"title":"First Records of Saddleback Syndrome and Pughead Deformities in the Common Pandora Pagellus erythrinus (Linnaeus, 1758) (Teleostei: Sparidae) from Wild Population in the Northern Aegean Sea, Turkey","authors":"L. Jawad, O. Akyol, İ. Aydin","doi":"10.5376/IJMS.2017.07.0019","DOIUrl":"https://doi.org/10.5376/IJMS.2017.07.0019","url":null,"abstract":"The first record of the abnormalities, saddleback syndrome and pughead is reported from common pandora Pagellus erythrinus collected from the northern Aegean Sea, Turkey. Externally, the pughead specimen was with a short neurocranium, normal jaws and mouth was closed. There are a significant osteological damages have been revealed by the radiograph of this deformed specimen. The saddleback anomaly is located in the spinous part of the dorsal fin that showed a loss of 8 spines. In addition, few scales of the lateral line were deformed. The radiograph image showed that the whole 8 spines and their supporting pterygiophores were missing. These abnormalities have been considered as an important indicator of environmentally induced stress to the wild fishes. Hence, the present finding highlights the need for closer monitoring of the marine environment and for the identification of the specific factor that causes these abnormalities.","PeriodicalId":22529,"journal":{"name":"The international journal of marine science","volume":"182 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79468400","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 : 2017-05-23DOI: 10.5376/ijms.2017.07.0017
H. M. Vu, B. Casareto, K. Hayashizaki, Laddawan Sangsawang, Keita Toyoda, Lan Dinh Tran, Yoshimi Suzuki
Demersal zooplankton (DZ) appear in the water column at night, and are highly abundant in mangrove, seagrass, and coral reef habitats; however, few studies have discussed their role in aquatic food webs, considering different consumers and their preferences on different DZ’ size classes. This study elucidates the role of DZ as a food source for higher trophic levels in an estuarine area, particularly with respect to the food preference and size selection of their consumers. The study was conducted in the mangrove forest of Fukido Estuary and an adjacent reef lagoon (with seagrass-dominated and seagrass-coral mixture areas) on Ishigaki Island, Japan. The abundance of demersal zooplankton was 4.0, 5.4, and 11.3×10 4 ind.m -2 for seagrass, mangrove, and seagrass-coral mixture habitats, respectively. The lowest DZ biomass was recorded in mangroves and mainly dominated by smaller organisms, because their consumers in this habitat prefer large-sized prey. The δ 13 C and δ 15 N signatures showed that, in mangroves, demersal zooplankton constituted a higher proportion of the diet of fishes than in lagoon habitats; however, demersal zooplankton did not have a significant role in the diet of fishes and macroinvertebrates in the lagoon. Consistency among biomass, stomach contents, and the proportions of DZ of all size classes in the diet of mangrove fishes indicated that DZ serve as a major food source. In contrast, fishes in lagoon habitats consumed more crabs, shrimps and mollusks than DZ. In conclusion, our analytical approach allowed us to demonstrate that DZ of different body sizes serve as food sources for different consumers in different habitats of the estuarine ecosystem.
{"title":"Role of Demersal Zooplankton as a Food Source for Higher Trophic Levels at Fukido Estuary, Ishigaki Island, Okinawa, Japan","authors":"H. M. Vu, B. Casareto, K. Hayashizaki, Laddawan Sangsawang, Keita Toyoda, Lan Dinh Tran, Yoshimi Suzuki","doi":"10.5376/ijms.2017.07.0017","DOIUrl":"https://doi.org/10.5376/ijms.2017.07.0017","url":null,"abstract":"Demersal zooplankton (DZ) appear in the water column at night, and are highly abundant in mangrove, seagrass, and coral reef habitats; however, few studies have discussed their role in aquatic food webs, considering different consumers and their preferences on different DZ’ size classes. This study elucidates the role of DZ as a food source for higher trophic levels in an estuarine area, particularly with respect to the food preference and size selection of their consumers. The study was conducted in the mangrove forest of Fukido Estuary and an adjacent reef lagoon (with seagrass-dominated and seagrass-coral mixture areas) on Ishigaki Island, Japan. The abundance of demersal zooplankton was 4.0, 5.4, and 11.3×10 4 ind.m -2 for seagrass, mangrove, and seagrass-coral mixture habitats, respectively. The lowest DZ biomass was recorded in mangroves and mainly dominated by smaller organisms, because their consumers in this habitat prefer large-sized prey. The δ 13 C and δ 15 N signatures showed that, in mangroves, demersal zooplankton constituted a higher proportion of the diet of fishes than in lagoon habitats; however, demersal zooplankton did not have a significant role in the diet of fishes and macroinvertebrates in the lagoon. Consistency among biomass, stomach contents, and the proportions of DZ of all size classes in the diet of mangrove fishes indicated that DZ serve as a major food source. In contrast, fishes in lagoon habitats consumed more crabs, shrimps and mollusks than DZ. In conclusion, our analytical approach allowed us to demonstrate that DZ of different body sizes serve as food sources for different consumers in different habitats of the estuarine ecosystem.","PeriodicalId":22529,"journal":{"name":"The international journal of marine science","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82669748","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：