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Coastal motion at tide gauge stations along the Black Sea coast from in-situ and space-based observations
IF 2.1 4区 环境科学与生态学 Q3 ECOLOGY Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104036
Muharrem Hilmi Erkoç , Uğur Doğan , Mehmet Simav , İlay Farımaz
The aim of this study is to determine the vertical land motion (VLM) and horizontal land motion (HLM) at the tide gauge stations located along the coast of the Black Sea using ground-based (GNSS and tide gauge) and satellite-based (satellite altimetry and InSAR) data. In this context, the tide gauge data were initially obtained from the Turkish Sea Level Monitoring System (TUDES) and Permanent Service for Mean Sea Level (PSMSL) data archive. The XTRACK data set, adopting the coastal altimetry approach, was selected as the satellite altimetry data, and sea level data from both methods were subjected to the Least Squares Parameter Estimation to determine sea level trends. The trends in sea level during the time period of 1993–2022 have been estimated based on the installation dates of tide gauge stations, using data from both tide gauge stations and satellite altimetry. In the analyses based on sea level data, subsidence trends were determined between the years 1993–2022 at the AMSR, TRAB, and POTI tide gauge stations, while an uplifting trend in VLM was observed at the other stations. These values were compared with the results obtained from GNSS observations at the tide gauge stations using the GAMIT/GLOBK software, yielding consistent outcomes. Furthermore, through the evaluation of GNSS data, the HLM at all tide gauge stations in the Black Sea region was estimated to be 1.4 ± 1.7 mm/yr in the northeast direction (approximately 63 degrees).Additionally, a regional sea level trend map was generated using XTRACK satellite altimetry data from 1993 to 2022, revealing a sea level rise trend of 1.3 ± 0.6 mm/yr in the Black Sea.
{"title":"Coastal motion at tide gauge stations along the Black Sea coast from in-situ and space-based observations","authors":"Muharrem Hilmi Erkoç ,&nbsp;Uğur Doğan ,&nbsp;Mehmet Simav ,&nbsp;İlay Farımaz","doi":"10.1016/j.rsma.2025.104036","DOIUrl":"10.1016/j.rsma.2025.104036","url":null,"abstract":"<div><div>The aim of this study is to determine the vertical land motion (VLM) and horizontal land motion (HLM) at the tide gauge stations located along the coast of the Black Sea using ground-based (GNSS and tide gauge) and satellite-based (satellite altimetry and InSAR) data. In this context, the tide gauge data were initially obtained from the Turkish Sea Level Monitoring System (TUDES) and Permanent Service for Mean Sea Level (PSMSL) data archive. The XTRACK data set, adopting the coastal altimetry approach, was selected as the satellite altimetry data, and sea level data from both methods were subjected to the Least Squares Parameter Estimation to determine sea level trends. The trends in sea level during the time period of 1993–2022 have been estimated based on the installation dates of tide gauge stations, using data from both tide gauge stations and satellite altimetry. In the analyses based on sea level data, subsidence trends were determined between the years 1993–2022 at the AMSR, TRAB, and POTI tide gauge stations, while an uplifting trend in VLM was observed at the other stations. These values were compared with the results obtained from GNSS observations at the tide gauge stations using the GAMIT/GLOBK software, yielding consistent outcomes. Furthermore, through the evaluation of GNSS data, the HLM at all tide gauge stations in the Black Sea region was estimated to be 1.4 ± 1.7 mm/yr in the northeast direction (approximately 63 degrees).Additionally, a regional sea level trend map was generated using XTRACK satellite altimetry data from 1993 to 2022, revealing a sea level rise trend of 1.3 ± 0.6 mm/yr in the Black Sea.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104036"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diversity and ecology of pollution tolerant phytoplankton along Patalganga estuary, West Coast of India
IF 2.1 4区 环境科学与生态学 Q3 ECOLOGY Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104027
Swarnendu Bera, Soumili Paul, C.K. Haridevi
The present study aimed to comprehend the seasonal diversity and distribution of the phytoplankton community influenced by organic matter through point and non-point sources in different salinity regimes of the Patalganga estuary. High nutrient loading in the form of nitrogen and phosphorus from mid to upper stretch of the estuary during post monsoon has resulted in high diversity and density of pollution indicator phytoplankton. The study identified 38 pollution tolerant genera within the estuary. Palmer’s Algal Genus Pollution Index (AGPI) also substantiated that mid to upper estuary is moderately organic polluted during post monsoon. In contrast, during pre monsoon, the study identified low density and diversity due to lower riverine input and prolonged exposure to pollution which rendered the environment toxic for the phytoplankton. The study concluded that the unspecified and scattered non-point sources contribute more significantly to the deterioration of the meso-oligohaline region of the estuary as compared to the point sources.
{"title":"Diversity and ecology of pollution tolerant phytoplankton along Patalganga estuary, West Coast of India","authors":"Swarnendu Bera,&nbsp;Soumili Paul,&nbsp;C.K. Haridevi","doi":"10.1016/j.rsma.2025.104027","DOIUrl":"10.1016/j.rsma.2025.104027","url":null,"abstract":"<div><div>The present study aimed to comprehend the seasonal diversity and distribution of the phytoplankton community influenced by organic matter through point and non-point sources in different salinity regimes of the Patalganga estuary. High nutrient loading in the form of nitrogen and phosphorus from mid to upper stretch of the estuary during post monsoon has resulted in high diversity and density of pollution indicator phytoplankton. The study identified 38 pollution tolerant genera within the estuary. Palmer’s Algal Genus Pollution Index (AGPI) also substantiated that mid to upper estuary is moderately organic polluted during post monsoon. In contrast, during pre monsoon, the study identified low density and diversity due to lower riverine input and prolonged exposure to pollution which rendered the environment toxic for the phytoplankton. The study concluded that the unspecified and scattered non-point sources contribute more significantly to the deterioration of the meso-oligohaline region of the estuary as compared to the point sources.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104027"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unveiling hidden connections using photogrammetry: Multi-scale relationships between benthic communities and rocky subtidal seascapes
IF 2.1 4区 环境科学与生态学 Q3 ECOLOGY Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104010
Q. Ternon , F. Ysnel , A. Collin , P. Thiriet , M. Guillaume , V. Danet , E. Feunteun
The objective of the present study is to unravel the multi-scale processes involved in structuring of infralittoral rocky biocenoses habitat characteristics. A photogrammetric methodology (supervised classification) was developed in three rocky reefs of Saint-Malo bay (∼ 250 km², France) to describe the biotope and the associated benthic community (photo-quadrat and morphotypic approach) along 120-m² transects. The methodology captured more than 70 % of morphotypic richness, and successfully estimated the morphotype proportions. The results confirmed the importance of the broad-scale (> 120 m²) processes as a driver of benthic communities (24 % of variance explained). Interestingly, the photogrammetric metrics revealed that the benthic morphotypic composition was also shaped by fine-scale (< 120 m²) habitat characteristics (18 % and 37 % of variance explained by geomorphology and substrate composition, respectively). Substrate typological patches and geomorphological descriptors also structured the benthic community composition. This study provides tools for characterizing and predicting benthic community characteristics from multi-scale habitat descriptions in temperate rocky reefs.
{"title":"Unveiling hidden connections using photogrammetry: Multi-scale relationships between benthic communities and rocky subtidal seascapes","authors":"Q. Ternon ,&nbsp;F. Ysnel ,&nbsp;A. Collin ,&nbsp;P. Thiriet ,&nbsp;M. Guillaume ,&nbsp;V. Danet ,&nbsp;E. Feunteun","doi":"10.1016/j.rsma.2025.104010","DOIUrl":"10.1016/j.rsma.2025.104010","url":null,"abstract":"<div><div>The objective of the present study is to unravel the multi-scale processes involved in structuring of infralittoral rocky biocenoses habitat characteristics. A photogrammetric methodology (supervised classification) was developed in three rocky reefs of Saint-Malo bay (∼ 250 km², France) to describe the biotope and the associated benthic community (photo-quadrat and morphotypic approach) along 120-m² transects. The methodology captured more than 70 % of morphotypic richness, and successfully estimated the morphotype proportions. The results confirmed the importance of the broad-scale (&gt; 120 m²) processes as a driver of benthic communities (24 % of variance explained). Interestingly, the photogrammetric metrics revealed that the benthic morphotypic composition was also shaped by fine-scale (&lt; 120 m²) habitat characteristics (18 % and 37 % of variance explained by geomorphology and substrate composition, respectively). Substrate typological patches and geomorphological descriptors also structured the benthic community composition. This study provides tools for characterizing and predicting benthic community characteristics from multi-scale habitat descriptions in temperate rocky reefs.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104010"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of CO2 driven seawater acidification on survival, growth, amino acid and fatty acid levels in the edible shrimp Litopenaeus vannamei
IF 2.1 4区 环境科学与生态学 Q3 ECOLOGY Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104021
Thirunavukkarasu Muralisankar , Said Hamid Thangal , Perumal Santhanam , Ayyasamy Gowthami , Kannan Mohan , Balu Alagar Venmathi Maran
Acidification in the ocean environment is considered a worldwide problem that drives serious consequences for organisms. The current investigation was focused to study the effect of CO2 induced ocean acidification (OA) on the survival, growth, and composition of amino acids and fatty acids in the shrimp Litopenaeus vannamei. A seven weeks OA experiment was conducted on the shrimp groups with different pH such as 8.2 (control), 7.8, 7.6, 7.4, 7.2, and 7.0. A considerable decline in survival, growth, essential and nonessential amino acids, and saturated fatty acids was recorded in shrimps under OA exposures (pH 7.8–7.0). In this context, a notable improvement in amino acids (histidine, alanine, and cysteine) and fatty acids (palmitoleic acid, linoleic acid, linolenic acid, eicosapentaenoic acid, and docosahexaenoic acid) in L. vannamei reared under acidified seawater environments suggests that the high demand for these amino acids and fatty acids to tolerate the acidic stress.
{"title":"Effect of CO2 driven seawater acidification on survival, growth, amino acid and fatty acid levels in the edible shrimp Litopenaeus vannamei","authors":"Thirunavukkarasu Muralisankar ,&nbsp;Said Hamid Thangal ,&nbsp;Perumal Santhanam ,&nbsp;Ayyasamy Gowthami ,&nbsp;Kannan Mohan ,&nbsp;Balu Alagar Venmathi Maran","doi":"10.1016/j.rsma.2025.104021","DOIUrl":"10.1016/j.rsma.2025.104021","url":null,"abstract":"<div><div>Acidification in the ocean environment is considered a worldwide problem that drives serious consequences for organisms. The current investigation was focused to study the effect of CO<sub>2</sub> induced ocean acidification (OA) on the survival, growth, and composition of amino acids and fatty acids in the shrimp <em>Litopenaeus vannamei</em>. A seven weeks OA experiment was conducted on the shrimp groups with different pH such as 8.2 (control), 7.8, 7.6, 7.4, 7.2, and 7.0. A considerable decline in survival, growth, essential and nonessential amino acids, and saturated fatty acids was recorded in shrimps under OA exposures (pH 7.8–7.0). In this context, a notable improvement in amino acids (histidine, alanine, and cysteine) and fatty acids (palmitoleic acid, linoleic acid, linolenic acid, eicosapentaenoic acid, and docosahexaenoic acid) in <em>L. vannamei</em> reared under acidified seawater environments suggests that the high demand for these amino acids and fatty acids to tolerate the acidic stress.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104021"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New records of peppermint shrimps from northeastern Brazil support Lysmata lipkei as junior synonym of Lysmata dispar
IF 2.1 4区 环境科学与生态学 Q3 ECOLOGY Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104043
Rodrigo Guéron , J. Antonio Baeza , Gabriel Lucas Bochini , Mariana Terossi , Alexandre Oliveira Almeida
Due to their beauty and effectiveness in controlling aquarium pests, shrimps belonging to the genus Lysmata are among the most sought-after marine invertebrates by aquarists worldwide. Unfortunately, these shrimps are taken from their natural habitat to supply the ornamental market. Therefore, efforts to catalog the biodiversity of these species must be considered a priority measure for their conservation. Thus, the present study aims to survey the diversity of Lysmata along the coast of the state of Pernambuco and Fernando de Noronha Archipelago, northeastern Brazil. We collected shrimps using various techniques, which included dredging operations, the use of artificial refuge structures, and manual sampling. Also, we examined additional specimens deposited in crustacean collections. When possible, we identified the specimens through morphological, molecular, and color pattern data. Here, we synonymize L. lipkei to L. dispar and record for the first time L. bahia and L. dispar along the coast of Pernambuco, and L. moorei in Fernando de Noronha. Additionally, remarks are provided on L. intermedia and two specimens identified as Lysmata sp. collected at 80 and 102 m depth. We discuss details of why they were not assigned to a species and their similarity with congeners such as L. pederseni, L. rafa, and L. rathbunae. This study increases the number of peppermint shrimp species for the state of Pernambuco from five to eight and provides the first lysmatid record from Fernando de Noronha.
{"title":"New records of peppermint shrimps from northeastern Brazil support Lysmata lipkei as junior synonym of Lysmata dispar","authors":"Rodrigo Guéron ,&nbsp;J. Antonio Baeza ,&nbsp;Gabriel Lucas Bochini ,&nbsp;Mariana Terossi ,&nbsp;Alexandre Oliveira Almeida","doi":"10.1016/j.rsma.2025.104043","DOIUrl":"10.1016/j.rsma.2025.104043","url":null,"abstract":"<div><div>Due to their beauty and effectiveness in controlling aquarium pests, shrimps belonging to the genus <em>Lysmata</em> are among the most sought-after marine invertebrates by aquarists worldwide. Unfortunately, these shrimps are taken from their natural habitat to supply the ornamental market. Therefore, efforts to catalog the biodiversity of these species must be considered a priority measure for their conservation. Thus, the present study aims to survey the diversity of <em>Lysmata</em> along the coast of the state of Pernambuco and Fernando de Noronha Archipelago, northeastern Brazil. We collected shrimps using various techniques, which included dredging operations, the use of artificial refuge structures, and manual sampling. Also, we examined additional specimens deposited in crustacean collections. When possible, we identified the specimens through morphological, molecular, and color pattern data. Here, we synonymize <em>L. lipkei</em> to <em>L. dispar</em> and record for the first time <em>L. bahia</em> and <em>L. dispar</em> along the coast of Pernambuco, and <em>L. moorei</em> in Fernando de Noronha. Additionally, remarks are provided on <em>L. intermedia</em> and two specimens identified as <em>Lysmata</em> sp. collected at 80 and 102 m depth. We discuss details of why they were not assigned to a species and their similarity with congeners such as <em>L. pederseni</em>, <em>L. rafa</em>, and <em>L. rathbunae</em>. This study increases the number of peppermint shrimp species for the state of Pernambuco from five to eight and provides the first lysmatid record from Fernando de Noronha.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104043"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Differences in the lag characteristics of saltwater intrusion in the sub-estuaries of the Pearl River Estuary and their implications for water allocation
IF 2.1 4区 环境科学与生态学 Q3 ECOLOGY Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104011
Fei Yuan , Chen Lu , Fang Yang , Zhongyuan Lin , Yugui Yang
The water dispatch during the dry season of the Pearl River Estuary(PRE) has effectively responded to the adverse effects brought by the saltwater intrusion for many years, however, in recent years the saltwater intrusion of the estuary is still further intensified, seriously affected the water supply safety of the estuary and its irradiated area The Guangdong-Hong Kong-Macao Greater Bay Area. In order to manage the water dispatch for preventing the saltwater intrusion more reasonably, it is urgent to study the spatial-temporal characteristics of the saltwater intrusion in the sub-estuaries of the PRE. The wavelet analysis and cross wavelet method used and the results show: there is obvious diurnal, semi-diurnal and semi-lunar cycle of the salinity in most waters of the PRE. The changes in salinity at each sub-estuary are not synchronized with the tidal processes. The semi-monthly periodic changes in salinity typically precede the changes in tidal range, with the salt front appearing 3–4 days before spring tides. The diurnal and semi-diurnal periodic changes in salinity usually lag behind the changes in tidal levels, with the salt front occurring 2–3 hours after high tide. Only at the Hongqi Men sub-estuary does the salt front appear 1 day before spring tides and 8 hours after high tide. The main reason for the differences in lag characteristics may lie in the varying mixing states of saltwater and freshwater in different estuaries. Consequently, the optimal timing for freshwater releases to control salinity intrusion also varies among the sub-estuaries. In the practice of suppressing saltwater intrusions, it is important to choose appropriate timing for water releases based on these lag characteristics and to scientifically manage water allocation to achieve maximum benefits with minimal water usage. We hope that the experience gained from the PRE will be helpful to other coastal regions around the world.
{"title":"Differences in the lag characteristics of saltwater intrusion in the sub-estuaries of the Pearl River Estuary and their implications for water allocation","authors":"Fei Yuan ,&nbsp;Chen Lu ,&nbsp;Fang Yang ,&nbsp;Zhongyuan Lin ,&nbsp;Yugui Yang","doi":"10.1016/j.rsma.2025.104011","DOIUrl":"10.1016/j.rsma.2025.104011","url":null,"abstract":"<div><div>The water dispatch during the dry season of the Pearl River Estuary(PRE) has effectively responded to the adverse effects brought by the saltwater intrusion for many years, however, in recent years the saltwater intrusion of the estuary is still further intensified, seriously affected the water supply safety of the estuary and its irradiated area The Guangdong-Hong Kong-Macao Greater Bay Area. In order to manage the water dispatch for preventing the saltwater intrusion more reasonably, it is urgent to study the spatial-temporal characteristics of the saltwater intrusion in the sub-estuaries of the PRE. The wavelet analysis and cross wavelet method used and the results show: there is obvious diurnal, semi-diurnal and semi-lunar cycle of the salinity in most waters of the PRE. The changes in salinity at each sub-estuary are not synchronized with the tidal processes. The semi-monthly periodic changes in salinity typically precede the changes in tidal range, with the salt front appearing 3–4 days before spring tides. The diurnal and semi-diurnal periodic changes in salinity usually lag behind the changes in tidal levels, with the salt front occurring 2–3 hours after high tide. Only at the Hongqi Men sub-estuary does the salt front appear 1 day before spring tides and 8 hours after high tide. The main reason for the differences in lag characteristics may lie in the varying mixing states of saltwater and freshwater in different estuaries. Consequently, the optimal timing for freshwater releases to control salinity intrusion also varies among the sub-estuaries. In the practice of suppressing saltwater intrusions, it is important to choose appropriate timing for water releases based on these lag characteristics and to scientifically manage water allocation to achieve maximum benefits with minimal water usage. We hope that the experience gained from the PRE will be helpful to other coastal regions around the world.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104011"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Black garlic (Allium sativum) powder, a promising feed supplementation improves hematological and immunological indices, body composition, and growth performance of golden pompano (Trachinotus blochii)
IF 2.1 4区 环境科学与生态学 Q3 ECOLOGY Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104034
Thu Thi Anh Nguyen , Cuong Thanh Le , Leo Nankervis , Cam Hong Van , Sang Van Vu , Minh Hai Dao , Khanh Thi Pham , Ut Van Phan
Golden pompano (Trachinotus blochii) is a key aquaculture species in Asia, facing challenges from pathogens in open farming systems. Addressing diseases traditionally through antibiotics and chemicals, the sustainable alternative of using natural immune stimulants is becoming more prevalent. This study focuses on black garlic, a fermented form of fresh garlic (Allium sativum L.), known for higher bioactive compounds, which has not been extensively researched in aquaculture. We investigated the impact of black garlic supplementation in diets on the growth, feed utilization, blood health, enzymatic antioxidants, antibacterial activity, and immune gene expression in golden pompano. A total of 600 fish with an initial average weight of 7.6 ± 0.2 g were assigned to five diets containing 0 (Diet 1), 10 (Diet 2), 20 (Diet 3), 40 (Diet 4), and 80 (Diet 5) g/kg of black garlic over eight weeks. Growth performance metrics such as average length growth (ALG), average weight growth (AWG), specific growth rate (SGR), and feed conversion ratio (FCR) were significantly enhanced, particularly with Diet 4 showing the highest mean weight gain (P < 0.05). Hematological analyses revealed increases in both red and white blood cell counts, with total superoxide dismutase, catalase, and lysozyme levels rising linearly and quadratically, most notably in Diets 4 and 5. Nevertheless, lysozyme gene expression did not show significant changes across the treatments. The results suggest that black garlic at concentrations of 40–80 g/kg in feed can substantially improve growth rates, innate immunity, and antioxidant activity in golden pompano, demonstrating its potential as a beneficial dietary supplement in aquaculture.
{"title":"Black garlic (Allium sativum) powder, a promising feed supplementation improves hematological and immunological indices, body composition, and growth performance of golden pompano (Trachinotus blochii)","authors":"Thu Thi Anh Nguyen ,&nbsp;Cuong Thanh Le ,&nbsp;Leo Nankervis ,&nbsp;Cam Hong Van ,&nbsp;Sang Van Vu ,&nbsp;Minh Hai Dao ,&nbsp;Khanh Thi Pham ,&nbsp;Ut Van Phan","doi":"10.1016/j.rsma.2025.104034","DOIUrl":"10.1016/j.rsma.2025.104034","url":null,"abstract":"<div><div>Golden pompano (Trachinotus blochii) is a key aquaculture species in Asia, facing challenges from pathogens in open farming systems. Addressing diseases traditionally through antibiotics and chemicals, the sustainable alternative of using natural immune stimulants is becoming more prevalent. This study focuses on black garlic, a fermented form of fresh garlic (Allium sativum L.), known for higher bioactive compounds, which has not been extensively researched in aquaculture. We investigated the impact of black garlic supplementation in diets on the growth, feed utilization, blood health, enzymatic antioxidants, antibacterial activity, and immune gene expression in golden pompano. A total of 600 fish with an initial average weight of 7.6 ± 0.2 g were assigned to five diets containing 0 (Diet 1), 10 (Diet 2), 20 (Diet 3), 40 (Diet 4), and 80 (Diet 5) g/kg of black garlic over eight weeks. Growth performance metrics such as average length growth (ALG), average weight growth (AWG), specific growth rate (SGR), and feed conversion ratio (FCR) were significantly enhanced, particularly with Diet 4 showing the highest mean weight gain (P &lt; 0.05). Hematological analyses revealed increases in both red and white blood cell counts, with total superoxide dismutase, catalase, and lysozyme levels rising linearly and quadratically, most notably in Diets 4 and 5. Nevertheless, lysozyme gene expression did not show significant changes across the treatments. The results suggest that black garlic at concentrations of 40–80 g/kg in feed can substantially improve growth rates, innate immunity, and antioxidant activity in golden pompano, demonstrating its potential as a beneficial dietary supplement in aquaculture.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104034"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Land Use Land Cover structural impact on abundance of antibiotic resistant Bacillus species in Tropical Estuary of India
IF 2.1 4区 环境科学与生态学 Q3 ECOLOGY Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2024.104005
Abhay B. Fulke , Shrushti Eranezhath , Gopal Krushna Swain , Neha Tiwari , G. Udhaba Dora
In recent decades, the Land Use Land Cover (LULC) in the coastal environment along with ambient scenario of metocean condition has been considered as one of prime factors in distribution and diversity of biota. Antibiotic use and abuse are a prevalent global issue that significantly increases the levels of antibiotics in the environment and the rates at which they spread. Today, it is safe to say that mass manufacture and use of antibiotics for purposes other than medical treatment have a negative influence on both the environment and human health. The main public health worry is that bacterial strains isolated from various ecosystems are resistant to antibiotics used in human medicine, severely limiting therapeutic options and endangering the lives of afflicted individuals. The presence of antibiotic-resistant bacteria and the morphological environmental conditions that contribute to their prevalence in estuaries is poorly known. We used the Kirby Bauer disc diffusion assay for susceptibility test to examine multi-antibiotic-resistant bacteria in both water and sediments across the Amba Estuary. The study of 16S rRNA from Gram positive multidrug-resistant isolates revealed a phylogenetic uniform group of resistant Bacillus species. This study uncovers a widespread distribution of antibiotic-resistant Bacillus sp. in the estuary, regardless of salinity gradient, and establishes a link between the abundance of antibiotic-resistant bacteria and sewage-associated bacterium levels in the estuary across distinct morphology. Colonies with MAR indices of ˃0.2 were isolated and found to be 100 % ampicillin resistant. The middle and upper estuary zones had a significant percentage of antibiotic-resistant microbes. Present study showed that the LULC dominates the distribution and diversity of microbial structure rather than salinity gradient. The significant diversity of antibiotic-resistant microbes across distinct morphology in the Amba estuary reveals the importance to understand the environmental microbial distribution in estuaries and prevent environmental health risks from antibiotic-resistant bacteria.
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引用次数: 0
eDNA-based seasonal monitoring reveals fish diversity patterns in mangrove habitats of Guinea-Bissau, West Africa
IF 2.1 4区 环境科学与生态学 Q3 ECOLOGY Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104013
Pieter-Jan Keleman , Jean-Dominique Durand , Monique Simier , Assana Camará , Rui Moutinho Sá , Jacques Panfili
The environmental DNA (eDNA) technique characterizes spatio-temporal fish diversity patterns along estuarine habitats, such as hard-to-reach mangroves, yet it has rarely been applied in West Africa. In this study conducted over two seasons (dry and rainy) in coastal Guinea Bissau, fish eDNA was extracted from water samples collected in three habitats with distinct human uses. These habitats included site-specific mangroves, rice fields, and transition zones sampled in three sites: Elalab in Cacheu, Malafo in Oio, and Cafine in Tombali regions. As a reference, DNA barcoding of 181 fishes resulted in 243 DNA sequences for two mitochondrial markers (139 for COI and 104 for 12S), corresponding to 76 species (69 for COI and 56 for 12S), after morpho-genetic confirmation. The metabarcoding analysis detected 49 environmental DNA-Operational Taxonomic Units (eOTUs), attributed to 15 fish orders, 29 families, 38 genera, and 32 species. Fish abundance varied between sites and seasons but not between habitats. The southern Cafine site had a significantly lower abundance during the dry season, whereas the northern Elalab site hosted relatively fewer species during the rainy season. The transition from rice fields to mangrove habitat showed a positive trend in Shannon diversity with no fish being present in the rice fields during the dry season except for Malafo. Remarkably, Coptodon cf. guineensis, Sarotherodon melanotheron and Pseudotolithus elongatus dominated the fish assemblages. This pioneering eDNA study efficiently surveyed seasonal fish diversity within Bissau-Guinean mangroves, demonstrating its potential as a novel fish monitoring tool toward effective conservation in West Africa. The coupling of these results with the human uses of mangroves should be a target in future biomonitoring initiatives in the country and the broader region.
{"title":"eDNA-based seasonal monitoring reveals fish diversity patterns in mangrove habitats of Guinea-Bissau, West Africa","authors":"Pieter-Jan Keleman ,&nbsp;Jean-Dominique Durand ,&nbsp;Monique Simier ,&nbsp;Assana Camará ,&nbsp;Rui Moutinho Sá ,&nbsp;Jacques Panfili","doi":"10.1016/j.rsma.2025.104013","DOIUrl":"10.1016/j.rsma.2025.104013","url":null,"abstract":"<div><div>The environmental DNA (eDNA) technique characterizes spatio-temporal fish diversity patterns along estuarine habitats, such as hard-to-reach mangroves, yet it has rarely been applied in West Africa. In this study conducted over two seasons (dry and rainy) in coastal Guinea Bissau, fish eDNA was extracted from water samples collected in three habitats with distinct human uses. These habitats included site-specific mangroves, rice fields, and transition zones sampled in three sites: Elalab in Cacheu, Malafo in Oio, and Cafine in Tombali regions. As a reference, DNA barcoding of 181 fishes resulted in 243 DNA sequences for two mitochondrial markers (139 for COI and 104 for 12S), corresponding to 76 species (69 for COI and 56 for 12S), after morpho-genetic confirmation. The metabarcoding analysis detected 49 environmental DNA-Operational Taxonomic Units (eOTUs), attributed to 15 fish orders, 29 families, 38 genera, and 32 species. Fish abundance varied between sites and seasons but not between habitats. The southern Cafine site had a significantly lower abundance during the dry season, whereas the northern Elalab site hosted relatively fewer species during the rainy season. The transition from rice fields to mangrove habitat showed a positive trend in Shannon diversity with no fish being present in the rice fields during the dry season except for Malafo. Remarkably, <em>Coptodon cf. guineensis</em>, <em>Sarotherodon melanotheron</em> and <em>Pseudotolithus elongatus</em> dominated the fish assemblages. This pioneering eDNA study efficiently surveyed seasonal fish diversity within Bissau-Guinean mangroves, demonstrating its potential as a novel fish monitoring tool toward effective conservation in West Africa. The coupling of these results with the human uses of mangroves should be a target in future biomonitoring initiatives in the country and the broader region.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104013"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kinetics and toxicity of atypical microplastics in the manila clam Ruditapes philippinarum: A quantitative analysis of accumulation and excretion
IF 2.1 4区 环境科学与生态学 Q3 ECOLOGY Pub Date : 2025-02-01 DOI: 10.1016/j.rsma.2025.104012
Yooeun Chae , Yunwi Heo , Jin Soo Choi , Hyeonji Nam , Tae Hee Kim , June-Woo Park
Recently, microplastics (MPs) are ubiquitous environmental pollutants, and many organisms are indiscriminately exposed to microplastics across different environments. We evaluated the patterns of accumulation and excretion of MPs of various sizes in the Manila clam Ruditapes philippinarum. Additionally, oxidative stress and inflammation-related responses of the clams exposed to MPs were analyzed. Significant differences in the accumulation and excretion of MPs were observed with the size variation of MPs and these differences impacted the filtration efficiency of clams. This suggests that the function of clams as a filter feeder may be compromised after MP exposure. MPs also induced oxidative stress and inflammatory responses after exposure. These results suggest that the kinetics of MPs in organisms may be variable related to the particle size and these MPs can influence the filtration efficiencies and the physical conditions of bivalves in marine ecosystems.
{"title":"Kinetics and toxicity of atypical microplastics in the manila clam Ruditapes philippinarum: A quantitative analysis of accumulation and excretion","authors":"Yooeun Chae ,&nbsp;Yunwi Heo ,&nbsp;Jin Soo Choi ,&nbsp;Hyeonji Nam ,&nbsp;Tae Hee Kim ,&nbsp;June-Woo Park","doi":"10.1016/j.rsma.2025.104012","DOIUrl":"10.1016/j.rsma.2025.104012","url":null,"abstract":"<div><div>Recently, microplastics (MPs) are ubiquitous environmental pollutants, and many organisms are indiscriminately exposed to microplastics across different environments. We evaluated the patterns of accumulation and excretion of MPs of various sizes in the Manila clam <em>Ruditapes philippinarum</em>. Additionally, oxidative stress and inflammation-related responses of the clams exposed to MPs were analyzed. Significant differences in the accumulation and excretion of MPs were observed with the size variation of MPs and these differences impacted the filtration efficiency of clams. This suggests that the function of clams as a filter feeder may be compromised after MP exposure. MPs also induced oxidative stress and inflammatory responses after exposure. These results suggest that the kinetics of MPs in organisms may be variable related to the particle size and these MPs can influence the filtration efficiencies and the physical conditions of bivalves in marine ecosystems.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"82 ","pages":"Article 104012"},"PeriodicalIF":2.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Regional Studies in Marine Science
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