Journal of Agricultural and Marine Sciences最新文献_第5页

An estimate of the willingness to pay for treated wastewater for irrigation in Oman 估计阿曼为灌溉处理过的废水支付费用的意愿

Journal of Agricultural and Marine Sciences Pub Date : 2016-01-01 DOI: 10.24200/JAMS.VOL21ISS0PP57-64

S. Zekri, S. A. Harthi, H. Kotagama, S. Bose

{"title":"An estimate of the willingness to pay for treated wastewater for irrigation in Oman","authors":"S. Zekri, S. A. Harthi, H. Kotagama, S. Bose","doi":"10.24200/JAMS.VOL21ISS0PP57-64","DOIUrl":"https://doi.org/10.24200/JAMS.VOL21ISS0PP57-64","url":null,"abstract":"The volume of Treated Wastewater (TW) produced in Oman is increasing, due to increased connection of houses to the sewage network and increased construction of wastewater treatment plants. Despite 68% of the TW been used for irrigating urban landscapes, 10.3 Mm3 TW has been discharged to the sea in 2014. Wastewater treatment plants are owned and operated by private companies, which aspire to sell excess TW, particularly to farmers, in order to recover cost of wastewater treatment. This paper has used the Contingent Valuation Method (CVM) to estimate the farmers’ Willingness to Pay (WTP) for TW for farm irrigation. Seventy two farmers responded to a face-to face interview on eliciting WTP to purchase TW as irrigation water, out of a total population of 400 farmers in Seeb region who have farms in proximity to a wastewater treatment plant. The results indicated that farmers’ WTP for TW was on average 0.111 OR/m3. WTP for TW was significantly affected by the income of farmers and whether the farm is a market oriented or non-market hobby oriented farm. The percentage of farmers willing to pay the average price or higher was 38%. Most farmers are not willing to pay the price currently charged by the wastewater treatment company for landscaping irrigation (0.220 OR/m3) given the large volumes required for farm irrigation. Even rich farmers maintaining hobby farms are willing to pay only 0.128 OR/m3 versus 0.087 OR/m3 by the market oriented farmers. The WTP for TW is higher than the prices reported (OR 0.005 to 0.023 OR/ m3) for groundwater used in agriculture in Oman. .","PeriodicalId":32106,"journal":{"name":"Journal of Agricultural and Marine Sciences","volume":"21 1","pages":"57-64"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69294581","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}

引用次数: 8

Spatio-temporal dynamics of land use changes in response to external pressures in Oman: Greenhouse cropping as an example 阿曼外部压力下土地利用变化的时空动态:以温室种植为例

Journal of Agricultural and Marine Sciences Pub Date : 2016-01-01 DOI: 10.24200/JAMS.VOL21ISS0PP33-46

M. Deadman, A. Al-Sadi, Malik M. Al-Wardi, K. S. Al-Kiyumi, W. Deadman, F. Said

{"title":"Spatio-temporal dynamics of land use changes in response to external pressures in Oman: Greenhouse cropping as an example","authors":"M. Deadman, A. Al-Sadi, Malik M. Al-Wardi, K. S. Al-Kiyumi, W. Deadman, F. Said","doi":"10.24200/JAMS.VOL21ISS0PP33-46","DOIUrl":"https://doi.org/10.24200/JAMS.VOL21ISS0PP33-46","url":null,"abstract":"Further from the northern coast of Oman new farm developments were more frequent than closer to the coast; they were also larger. The density of farms was highest close to Muscat although the distance enclosing 50% of farms had shifted away from Muscat during the study period. The dominance of Muscat is likely to be related to access to markets and infrastructure development. The increase in groundwater salinity was also highest close to Muscat and may be responsible for the shift in greenhouse density. Salinization of groundwater is severe close to the coast and was responsible for the reduced density of greenhouses near the coast. Land abandonment was highest close to Muscat and to the coast, reflecting changes in groundwater salinity and urbanization pressure. Less evidence was available for a direct shift from farmland to urban land use. Recent urban developments were largely located in areas already abandoned by agriculture. The paper also discusses likely future trends in land use change given that Oman’s population is increasing at over 2% annually and demand for urban land is increasing. The identification of a “salinity corridor” within which much of the future land use change may occur is discussed.","PeriodicalId":32106,"journal":{"name":"Journal of Agricultural and Marine Sciences","volume":"21 1","pages":"33-46"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69294571","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}

引用次数: 2

Serum biochemistry parameters in the Omani racing Arabian camels (Camelus dromedarius) 阿曼赛阿拉伯骆驼血清生化指标的研究

Journal of Agricultural and Marine Sciences Pub Date : 2016-01-01 DOI: 10.24200/JAMS.VOL21ISS0PP65-76

Yasmin ElTahir, H. Ali, B. Hago, O. Mahgoub

{"title":"Serum biochemistry parameters in the Omani racing Arabian camels (Camelus dromedarius)","authors":"Yasmin ElTahir, H. Ali, B. Hago, O. Mahgoub","doi":"10.24200/JAMS.VOL21ISS0PP65-76","DOIUrl":"https://doi.org/10.24200/JAMS.VOL21ISS0PP65-76","url":null,"abstract":"Blood samples were collected from thirty, 2-year old female Arabian camels from the eastern region of Oman. Camels were managed in the traditional way in the Arabian Gulf region, primarily fed fresh alfalfa and barley grain. Blood was drawn into serum vaccutainers from jugular venipuncture. Serum samples were analyzed by spectrophotometric analysis using a CX7/CX7 serum chemistry analyzer (Synchron, Beckman). Means, standard deviations and minimum and maximum values were calculated using Excel spreadsheets on Microsoft Office 2007. The SAS (2000) package was used to produce coefficient of determination (R2) between the eight serum mineral values. The following mean values A} standard deviation were recorded: glucose: 92.8A}19.2 mg/dL; total protein (TP): 6.17 A} 0.34 g/dL; albumin: 32.21 A} 9.933 mg/dL; blood urea nitrogen (BUN): 15.48 A} 4.49 mg/dL; creatinine: 1.64 A} 0.238 mg/dL; uric acid: 0.28 A} 0.041 mg/dL; total globulins (TG): 0.28 A} 0.041 mg/dL; cholesterol: 40.52 A} 13.225 mg/dL; total bilirubin: 0.34A}0.124 mg/dL; alkaline phosphatase (ALP): 113.9A}29.75 (IU/L); aspartate aminotransferase (AST): 88.8A}70.03 (IU/L); alanine aminotransferase (ALT): 13.3A}5.97 (IU/L); Gamma-Glutamyl Transpeptidase (GGT): 21.3A}10.18 (IU/L); lactate dehydrogenase (LD); 419.9A}160.38 (IU/L); Creatine kinase (CK): 46.3A}16.2 (IU/L); sodium (Na): 144.5A}5.80 mmol/L; potassium (K): 4.23A}0.42 mmol/L; calcium (Ca): 9.63A}0.43; phosphorus (P): 9.56?A}0.76 mg/dL; iron (Fe): 107.8A}25.54 μg/dl; copper (Cu): 72.5A}8.08 μg/dl; chlorine (Cl): 113.0A}4.52 mmol/L. Findings of the current study provide baseline values that may be used by clinicians for racing camels in Oman. There were some significant correlations especially between macro minerals (Na, Ca, K, and P) that may be used to estimate their values with less cost by reducing the number of elements to be analyzed.","PeriodicalId":32106,"journal":{"name":"Journal of Agricultural and Marine Sciences","volume":"21 1","pages":"65-76"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69295107","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}

引用次数: 5

Fouling and its next generation management: a perspective 污垢及其下一代管理:一个视角

Journal of Agricultural and Marine Sciences Pub Date : 2015-01-01 DOI: 10.24200/JAMS.VOL20ISS0PP16-23

D. Rittschof, Christina L. L. Chai, S. Teo, J. Maki

{"title":"Fouling and its next generation management: a perspective","authors":"D. Rittschof, Christina L. L. Chai, S. Teo, J. Maki","doi":"10.24200/JAMS.VOL20ISS0PP16-23","DOIUrl":"https://doi.org/10.24200/JAMS.VOL20ISS0PP16-23","url":null,"abstract":"The last 50 years of fouling research and management taught us that indiscriminate use of toxic approaches damages ecosystem services of estuaries and oceans critical to man’s existence. Next generation environmentally benign management requires knowledge of the fouling process and an understanding of the consequences of different management options. An intermediate step may be additives that fit with existing business models and distribution systems, but that carry a much reduced environmental footprint. Subsequently, the evolution of a next generation hull fouling management system with limited toxicity easy clean surfaces should replace or augment the existing commercial easy-release coatings. These new technologies require new business models and infrastructure. The path for a new commercial hull coating, from a concept to the actual product takes 25 to 35 years to complete. Major challenges include fitting in with existing business models and systems and meeting regulations. Leveraging on our experience in the development of additives as a case example, we offer a perspective on what the new fouling management systems might involve and discuss issues to be addressed as limited toxicity easy-clean coatings gain market share. As existing business cannot easily adapt to a different business model, evolution of new management solutions will require resources, a necessary long term perspective, and close working relationships between business and science to enable products in the global market.","PeriodicalId":32106,"journal":{"name":"Journal of Agricultural and Marine Sciences","volume":"20 1","pages":"16-23"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69291880","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}

引用次数: 4

Identification and characterization of two amylase producing bacteria Cellulosimicrobium sp. and Demequina sp. isolated from marine organisms 海洋生物中两种淀粉酶产菌cellulosimicroum sp.和Demequina sp.的鉴定与特性研究

Journal of Agricultural and Marine Sciences Pub Date : 2015-01-01 DOI: 10.24200/JAMS.VOL20ISS0PP8-15

Laila Al-Naamani, S. Dobretsov, J. Al-Sabahi, B. Soussi

{"title":"Identification and characterization of two amylase producing bacteria Cellulosimicrobium sp. and Demequina sp. isolated from marine organisms","authors":"Laila Al-Naamani, S. Dobretsov, J. Al-Sabahi, B. Soussi","doi":"10.24200/JAMS.VOL20ISS0PP8-15","DOIUrl":"https://doi.org/10.24200/JAMS.VOL20ISS0PP8-15","url":null,"abstract":"Marine sources have been known to yield novel compounds with a wide range of bioactivity with various commercial applications. In this study, the abilities of bacteria isolated from eight marine organisms to produce α-amylase were examined. All eight organisms were found to harbor amylase producing bacteria. Two bacterial species isolated from the green alga Ulva rigida and the sponge Mycale sp. were further identified and their α-amylases were purified and characterized. The bacterial species isolated from U. rigida and Mycale sp. were identified by DNA sequencing as Cellulosimicrobium sp. and Demequina sp., respectively. Cellulosimicrobium sp. obtained maximum cell growth and amylase production at 29.C and in the presence of lactose as a carbon source. Optimal cell growth and amylase production by Demequina sp. was observed at 35.C. While lactose enhanced cell growth of Demequina sp., maximum amylase production was found when fructose and glycerol were the available sources of carbon. Both strains grew better in the presence of tryptone, whilst peptone stimulated amylase production. Maximal cell growth and amylase production by both of the strains was found at a medium salinity of 3% NaCl.","PeriodicalId":32106,"journal":{"name":"Journal of Agricultural and Marine Sciences","volume":"20 1","pages":"8-15"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69294101","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}

引用次数: 16

Protein resources and aquafeed development in the Sultanate of Oman 阿曼苏丹国的蛋白质资源和水产养殖发展

Journal of Agricultural and Marine Sciences Pub Date : 2015-01-01 DOI: 10.24200/JAMS.VOL20ISS0PP47-53

S. Goddard, F. S. Ibrahim

{"title":"Protein resources and aquafeed development in the Sultanate of Oman","authors":"S. Goddard, F. S. Ibrahim","doi":"10.24200/JAMS.VOL20ISS0PP47-53","DOIUrl":"https://doi.org/10.24200/JAMS.VOL20ISS0PP47-53","url":null,"abstract":"The continued growth of intensive aquaculture is dependent on the development of sustainable protein sources to replace conventional fish meals in aquafeeds. Practical alternatives are plant-derived protein, protein from micro-organisms and protein from under-utilized marine resources. The challenges are to find alternative ingredients with high protein, suitable amino acid content, high palatability and absence of anti-nutritional factors. There is considerable biotechnology-based research in this area, including genetic modification of plant-based proteins, use of probiotics to enhance digestibility and the renewed application of fermentation technologies to produce single cell proteins. Research in Oman is focused on the utilization of marine protein resources. Fisheries by-catch and processing waste have been evaluated as liquid hydrolysates and as meals for inclusion in aquafeeds and new research is planned on the utilization of meso-pelagic fish (myctophids), which occur in abundance in the Arabian Sea and the Sea of Oman. Initial studies have been conducted on the biochemical composition of the lantern fish, Benthosema pterotum, which revealed favorable protein, amino acid and long-chain PUFA content. Potential limiting factors were high levels of saturated lipids and the heavy metals arsenic and cadmium. These results will be discussed within a general review of marine resources and aquafeed development in Oman.","PeriodicalId":32106,"journal":{"name":"Journal of Agricultural and Marine Sciences","volume":"20 1","pages":"47-53"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69292433","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}

引用次数: 2

Gill histology of Nile tilapia Oreochromis niloticus following chronic and acute exposure to ammonia 尼罗罗非鱼(Oreochromis niloticus)慢性和急性氨暴露后的鳃组织学

Journal of Agricultural and Marine Sciences Pub Date : 2015-01-01 DOI: 10.24200/jams.vol20iss0pp66-72

G. Yoon, N. Al-Saadi, A. AmbuAli

{"title":"Gill histology of Nile tilapia Oreochromis niloticus following chronic and acute exposure to ammonia","authors":"G. Yoon, N. Al-Saadi, A. AmbuAli","doi":"10.24200/jams.vol20iss0pp66-72","DOIUrl":"https://doi.org/10.24200/jams.vol20iss0pp66-72","url":null,"abstract":"Ammonia is a common aquatic pollutant and is toxic to fish. The main nitrogenous compound excreted by fish is also ammonia, which may reach toxic concentrations in high-density fish culture, reducing growth and productivity. In this study, changes in gill structure and mucus cell distribution were examined when juvenile Nile tilapia, Oreochromis niloticus, were exposed to chronic and acute concentrations of ammonia. For chronic exposure, the tilapia were exposed to daily increments in ammonia concentration rising from 0 mg L -1 ammonia on Day 0 to 5 mg L -1 by Day 8; the experiment was terminated on Day 9. There were obvious histopathological changes to the gills over this period including hypertrophy and fusion and of the secondary lamellae. The mucus cell number in gill histology sections were observed to increase until Day 6 then decrease thereafter until the termination of the trial. For the acute exposure, juvenile tilapia were exposed to 5 mg L -1 ammonia for 5 hours. Hourly changes to the gills were monitored, with notable changes to gill filaments and an observed increase in the mucus cell number over the duration of the experiment.","PeriodicalId":32106,"journal":{"name":"Journal of Agricultural and Marine Sciences","volume":"20 1","pages":"66-72"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69294027","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}

引用次数: 10

Improving the quality of tiger shrimp Penaeus monodon through dietary incorporation of algae as a source of natural pigment 通过在饲料中添加藻类作为天然色素来源来提高虎对虾的品质

Journal of Agricultural and Marine Sciences Pub Date : 2015-01-01 DOI: 10.24200/JAMS.VOL20ISS0PP62-65

K. Mondal, S. Bhattacharyya, A. Mitra

{"title":"Improving the quality of tiger shrimp Penaeus monodon through dietary incorporation of algae as a source of natural pigment","authors":"K. Mondal, S. Bhattacharyya, A. Mitra","doi":"10.24200/JAMS.VOL20ISS0PP62-65","DOIUrl":"https://doi.org/10.24200/JAMS.VOL20ISS0PP62-65","url":null,"abstract":"Tiger shrimp is one of the major candidate species for export oriented aquaculture which dominates the seafood market in regions of European Union, Japan and USA. Carotenoid content in seafood has now become one of the important criteria in determining the quality of edible product. Recent trends in supplementing fish diets with natural pigment source are an alternative to the utilization of expensive synthetic pigments. In this context, green algae Enteromorpha intestinalis was selected as a source of natural pigment for inclusion in the diet of tiger shrimp Penaeus monodon. Astaxanthin being an important category of carotenoid pigment was monitored in shrimp muscle tissue during the feeding trial. Significant variation (p<0.05) was observed between the experimental groups as confirmed through ANOVA thus exhibiting higher astaxanthin content of shrimps (18.70 A} 4.48 ppm) fed with E. intestinalis incorporated diet as compared to control (15.80 A} 2.33 ppm). The present programme therefore emphasizes on the quality improvement of aquaculture product by dietary inclusion of algae as a natural pigment source.","PeriodicalId":32106,"journal":{"name":"Journal of Agricultural and Marine Sciences","volume":"20 1","pages":"62-65"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69292585","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}

引用次数: 0

Mortality of the abalone Haliotis mariae (Haliotidae: Mollusca) in aquaculture 水产养殖中鲍鱼的死亡率

Journal of Agricultural and Marine Sciences Pub Date : 2015-01-01 DOI: 10.24200/JAMS.VOL20ISS0PP73-77

G. Yoon, H. Al-Kaabi, Um Kalthoum Al-Kindi, Salem Khoom, Mi-Young Cho, Myong Ae Park, A. Shinn

{"title":"Mortality of the abalone Haliotis mariae (Haliotidae: Mollusca) in aquaculture","authors":"G. Yoon, H. Al-Kaabi, Um Kalthoum Al-Kindi, Salem Khoom, Mi-Young Cho, Myong Ae Park, A. Shinn","doi":"10.24200/JAMS.VOL20ISS0PP73-77","DOIUrl":"https://doi.org/10.24200/JAMS.VOL20ISS0PP73-77","url":null,"abstract":"The Omani abalone, Haliotis mariae, is the only species of abalone found in Omani waters. Given the rarity of this species and the high price it can fetch on the market (US$ 150 kg -1 dry weight), the wild abalone fishery in the Dhofar region has been regarded as a valuable income source for the past decade. The present study was undertaken set to investigate the mortality of abalone held at the Mirbat Research Center, through bacteriological and histopathological based investigations and challenge tests. Only the adult wild abalone that had been kept for a year in the hatchery, visually, appeared to be clear of disease symptoms. Infected individuals typically were swollen around the mouth, had fluid tinged with blood, bubbles in the intestines, and, very weak adhesive strength. The foot area (muscle) of diseased animals was noticeably very soft and individuals that were seen lying upside down on the bottom of the tank subsequently died. On dissection, the intestinal organs released bubbles and a foul smelling odour. Identification of the isolated bacteria using various identification methods indicated that individuals were infected with Staphylococcus sciuri. Histopathology of infected individuals revealed spongiosis of the tissues with evident bacterial infection. Neither of these histopathological conditions were seen in healthy abalone. The study concludes that the bacterium Staphylococcus sciuri may be the likely cause of abalone mortalities.","PeriodicalId":32106,"journal":{"name":"Journal of Agricultural and Marine Sciences","volume":"20 1","pages":"73-77"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69294072","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}

引用次数: 0

Gill monogenean communities on three commercially important sparid fish in Omani waters 阿曼水域三种商业上重要的sparfish的鳃单基因群落

Journal of Agricultural and Marine Sciences Pub Date : 2015-01-01 DOI: 10.24200/JAMS.VOL20ISS0PP54-61

G. Yoon, H. Al-Adawi, A. Shinn

{"title":"Gill monogenean communities on three commercially important sparid fish in Omani waters","authors":"G. Yoon, H. Al-Adawi, A. Shinn","doi":"10.24200/JAMS.VOL20ISS0PP54-61","DOIUrl":"https://doi.org/10.24200/JAMS.VOL20ISS0PP54-61","url":null,"abstract":"The prevalence and intensity of polyopisthocotylean monogeneans on the gills of three commercially important species of sparid caught in Omani coastal waters close to the city port of Muscat were determined and compared. Throughout May 2012 to April 2013, infections on bi-weekly samples of the soldier seabream, Argyrops filamentosus (Valenciennes, 1830), the king soldier seabream, Argyrops spinifer (Forsskal, 1775), and, the silver seabream, Rhabdosargus sabra were evaluated. From a total of 200 specimens (standard length of 26–52 cm), caught by line angling or by traps, at least three species of gill monogenean, namely Omanicotyle [Bivagina] heterospina, Heteromicrocotyla sp. and Microcotyle sp., were commonly encountered. Silver bream, which was infected by all three monogeneans, bore the highest infections (100% prevalence; mean intensity of 20.14 ± 0.92 parasites fish-1), whilst the soldier bream, which was infected only by O. heterospina had the lowest levels of infection (of the three sparids with 63.8% prevalence; mean intensity 5.8 ± 0.17 parasites fish-1). Comments on the distribution of monogeneans on each host are provided but to what extent this is influenced by water current speeds passing through the buccal and opercular cavities, gill morphology, parasite size, and / or the morphology and efficiency of the parasite’s attachment apparatus requires establishing and forms the basis of ongoing investigations.","PeriodicalId":32106,"journal":{"name":"Journal of Agricultural and Marine Sciences","volume":"20 1","pages":"54-61"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69292571","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}

引用次数: 1