Regional Studies in Marine Science最新文献_第9页

A comparative study of microplastic contamination and ecological risk in beach and bottom sediments along the southern Black Sea coast 黑海南部海岸海滩和底部沉积物中微塑料污染与生态风险的比较研究

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-09 DOI: 10.1016/j.rsma.2026.104766

Yahya Terzi , Ahmet Raif Eryaşar , Nisan İşseven , İlhan Yandı , Ahmet Şahin , Rafet Çağrı Öztürk , Sedat Gündoğdu , Kenan Gedik

Microplastics (MPs) are now recognized as widespread pollutants in marine ecosystems, with semi-enclosed seas such as the Black Sea particularly vulnerable due to restricted water exchange and extensive land-based inputs. This study presents the first comparative assessment of MP contamination and ecological risk between beach and bottom sediments along the entire Black Sea coast of Türkiye, which comprises the basin’s longest national shoreline. A survey was conducted at 64 sites (38 beaches and 26 bottom-sediment sites). Mean concentrations were broadly comparable across matrices, averaging 140.39 ± 10.38 MP/kg in beach sediments and 106.19 ± 8.74 MP/kg in bottom sediments, though site-specific hotspots exceeded 200 MP/kg for both matrices. Fibers were the dominant morphology in both matrices, with a significantly higher proportion on beaches (74.1 %) than in bottom sediments (53.5 %), while fragments and films were relatively more abundant in bottom sediments. Blue and black particles were common in both environments. Polymer analysis revealed a strong dominance of polyethylene terephthalate (PET) in beach sediments (59.1 %). In contrast, seabed sediments displayed greater heterogeneity, with substantial polymer types of polyethylene (PE), polypropylene (PP), polyamide (PA), and polyacrylonitrile (PAN). Multivariate analyses confirmed statistically significant compositional differences between matrices, with PET identified as the primary driver of dissimilarity. The Polymer Hazard Index (PHI) indicated severe ecological risks, with over 70 % of sites in both matrices classified in the highest hazard category (Class V), underscoring the persistence of hazardous polymers and their potential bioavailability.

微塑料（MPs）现在被认为是海洋生态系统中广泛存在的污染物，黑海等半封闭海域由于有限的水交换和广泛的陆地输入而特别脆弱。这项研究首次对t rkiye整个黑海海岸的海滩和底部沉积物之间的MP污染和生态风险进行了比较评估，该海岸包括该盆地最长的国家海岸线。在64个地点（38个泳滩和26个底部沉积物地点）进行了调查。不同基质的平均浓度具有广泛的可比性，海滩沉积物的平均浓度为140.39 ± 10.38 MP/kg，海底沉积物的平均浓度为106.19 ± 8.74 MP/kg，尽管两种基质的特定地点热点均超过200 MP/kg。纤维是两种基质的主要形态，海滩上纤维的比例（74.1 %）显著高于底层沉积物（53.5 %），而碎屑和薄膜在底层沉积物中相对更丰富。蓝色和黑色颗粒在两种环境中都很常见。聚对苯二甲酸乙二醇酯（PET）在海滩沉积物中具有很强的优势（59.1% %）。相比之下，海底沉积物表现出更大的异质性，聚合物类型主要为聚乙烯（PE）、聚丙烯（PP）、聚酰胺（PA）和聚丙烯腈（PAN）。多变量分析证实了矩阵之间具有统计学意义的组成差异，PET被确定为差异的主要驱动因素。聚合物危害指数（PHI）表明存在严重的生态风险，两种基质中超过70% %的场地被列为最高危害类别（V类），强调了有害聚合物的持久性及其潜在的生物利用度。

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引用次数: 0

Summer ichthyoplankton assemblages and their environmental drivers in the Sinop Peninsula, Southern Central Black Sea 黑海中南部锡诺普半岛夏季浮游鱼群及其环境驱动因素

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-09 DOI: 10.1016/j.rsma.2026.104769

Orçin Uygun , Levent Bat , Murat Dağtekin , Funda Üstün

This study examines the composition and spatial distribution of ichthyoplankton assemblages in the central southern Black Sea, with a focus on the Sinop Peninsula. Ichthyoplankton samples were collected in June 2023 from 17 stations, and a total of 17 taxa belonging to 13 families were identified. Eggs of Engraulis encrasicolus, Merlangius merlangus, and Trachurus mediterraneus were the most abundant among ichthyoplankton, while larvae of Gobius niger and Diplodus annularis were dominant. The Shannon-Weaver index (H′) varied notably among stations, peaking at 2.32 in the easternmost site. Multivariate analyses (DistLM, dbRDA) revealed significant spatial differentiation in community structure, which was primarily associated with gradients in salinity, surface current velocity, and temperature. Environmental gradients are primary determinants of ichthyoplankton distribution, and mesoscale oceanographic processes significantly influence coastal ecosystem structure. Spatial segregation of spawning habitats, particularly between anchovy and horse mackerel, reflects distinct species-specific responses to salinity and current velocity in the Black Sea. This study provides a comprehensive description of the structure of the ichthyoplankton assemblages during the post-rainfall period, thereby establishing an important foundation for assessing the potential impacts of short-term meteorological disturbances on sensitive marine ecosystems.

本文以西诺普半岛为研究对象，研究了黑海中南部浮游鱼的组成和空间分布。2023年6月在17个站点采集浮游鱼标本，共鉴定出13科17个分类群。浮游鱼中以斑点小虾、斑点小虾和地中海沙龙的卵数量最多，黑戈比鱼和环鳞梁龙的幼虫数量最多。各站点间的Shannon-Weaver指数（H′）差异显著，最东端峰值为2.32。多变量分析（DistLM, dbRDA）显示，群落结构存在显著的空间分异，主要与盐度、表面流速和温度梯度有关。环境梯度是决定浮游鱼类分布的主要因素，中尺度海洋过程对沿海生态系统结构有显著影响。产卵栖息地的空间分离，特别是凤尾鱼和马鲛鱼之间的分离，反映了黑海中不同物种对盐度和流速的独特反应。该研究全面描述了雨后期浮游鱼群的结构，为评估短期气象扰动对敏感海洋生态系统的潜在影响奠定了重要基础。

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引用次数: 0

Measuring invaders: Innovative techniques for blue crab (Callinectes sapidus) biometric measurements 测量入侵者：蓝蟹（Callinectes sapidus）生物测量的创新技术

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-09 DOI: 10.1016/j.rsma.2026.104763

Lorenzo Zacchetti , Leonardo Marconi , Federico Calì , Filippo Domenichetti , Enrico Cecapolli , Michela Martinelli

The blue crab, Callinectes sapidus, is an invasive species in the Mediterranean Sea. The species caused significant ecological and economic damage and up to now in the Mediterranean it has been used only to a limited extent as a commercial resource. The present study aimed to provide conversion factors for the accurate reconstruction of weights in mutilated individuals using carapace width (CW), and to examine the biology of the blue crab in the Venetian Lagoon. A total of 570 blue crabs were sampled in 2024. Employing the conversion formula for estimating CW, data were recovered for those that exhibited mutilation of the lateral spines of the carapace. Approximately 66 % of blue crabs showed mutilation of the claws. By applying a weight conversion formula, a new body weight was estimated. This allowed the inclusion of mutilated individuals in the calculation of both the L50 (the CW at which 50 % of individuals are sexually mature) and the wet weight-CW relationship (WW-CW). Sex specific L50 values were calculated: 106.5 mm for males and 116.8 mm of CW for females. The WW-CW analysis enabled the estimation of sex-specific growth patterns, which were found to be higher in males than in females. These results provide crucial insights into population dynamics, as well as biometry and reproductive strategies of this species. These findings are essential for developing effective management and monitoring of the blue crab populations in non-native habitats.

蓝蟹（Callinectes sapidus）是地中海的一种入侵物种。该物种造成了重大的生态和经济损害，到目前为止，它在地中海仅被有限地用作商业资源。本研究旨在利用壳宽（CW）为准确重建残体蓝蟹体重提供转换因子，并对威尼斯潟湖蓝蟹的生物学特性进行研究。2024年共采集了570只蓝蟹。采用转换公式估计连续波，数据被恢复为那些表现出肢解的侧棘的甲壳。大约66% %的蓝蟹显示出爪子的残缺。通过应用体重转换公式，估算出新的体重。这允许在计算L50（50% %的个体性成熟的CW）和湿重-CW关系（WW-CW）时包括残害个体。计算性别特异性L50值：雄性为106.5 mm，雌性为116.8 mm。WW-CW分析能够估计出性别特异性生长模式，发现男性的生长模式高于女性。这些结果为该物种的种群动态、生物特征和繁殖策略提供了重要的见解。这些发现对于有效地管理和监测非本地生境的蓝蟹种群至关重要。

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引用次数: 0

Microplastic pollution and polymer risk assessment in the intertidal sediments of the southwest coast of India 印度西南海岸潮间带沉积物中微塑料污染及聚合物风险评估

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-08 DOI: 10.1016/j.rsma.2026.104755

Arya Dennison Bindulekha , Salom Gnana Thanga Vincent , Amrutha Vellore Mohankumar , Raja Sudhakaran , Jan Schwarzbauer

Microplastics (MPs) are emerging contaminants in coastal environments, potentially harming coastal communities. This study investigates the spatial and temporal distribution of microplastics in the intertidal zones of the southwest coast of India, specifically along the Thiruvananthapuram coastline. The study area spans approximately 60 km and is characterised by high population density, tourism, and fishing activities. A total of 24 sediment samples were collected from low, mid, and high tide zones during the wet (August 2019) and dry (March 2020) periods. Microplastic abundance showed significant spatial and seasonal variability, with 3520 items kg⁻¹ recorded during the wet period and 6590 items kg⁻¹ in the dry period. The predominant shapes identified were fibers, fragments, and films, with blue fibers being the most dominant. Polyethylene (PE) was the predominant polymer, followed by methylcellulose and styrene. Based on the Polymer Hazard Index (PHI), all sampling locations were fell into hazard levels III and V. During the wet period, most stations exhibited moderate risk, except station 2 (Pulluvila), which showed high risk. During the dry period, risk levels increased at most stations, while station 2 shifted to the moderate risk category. Despite their relatively low abundance, high-risk polymers such as polyacrylonitrile (PAN) and vinyl chloride (VC) significantly contributed to the overall hazard score. High tide zones exhibited greater MP abundance, reflecting the hydrodynamic conditions of the intertidal ecosystem. Tourist hotspots such as station 3 (Kovalam) and station 1 (Poovar) consistently showed elevated MP concentrations, indicating a direct link to anthropogenic activities, including tourism and waste disposal. These findings highlight the growing threat of microplastic pollution and emphasize the need for targeted mitigation and management strategies in coastal regions.

微塑料（MPs）是沿海环境中的新污染物，可能对沿海社区造成危害。本研究调查了微塑料在印度西南海岸潮间带的时空分布，特别是沿着蒂鲁凡南塔普兰海岸线。研究区面积约60 公里，以人口密度高、旅游和渔业活动为特征。在丰水期（2019年8月）和枯水期（2020年3月），从低潮区、中潮区和高潮区共采集了24份沉积物样本。微塑料丰度表现出显著的空间和季节变化，丰水期为3520项kg−1，枯水期为6590项kg−1。鉴定出的主要形状是纤维、碎片和薄膜，其中蓝色纤维占主导地位。聚乙烯（PE）是主要的聚合物，其次是甲基纤维素和苯乙烯。在丰水期，除2号站（Pulluvila）为高危站外，其余监测点均为中度风险。在干旱期，大多数站点的风险等级增加，而2号站点转移到中等风险类别。尽管它们的丰度相对较低，但聚丙烯腈（PAN）和氯乙烯（VC）等高风险聚合物对总体危害评分有显著贡献。高潮带MP丰度较高，反映了潮间带生态系统的水动力条件。3号站（Kovalam）和1号站（Poovar）等旅游热点持续显示MP浓度升高，表明与人为活动（包括旅游和废物处理）有直接联系。这些发现突出了微塑料污染日益严重的威胁，并强调需要在沿海地区制定有针对性的缓解和管理战略。

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引用次数: 0

Population structure and connectivity of Octopus mimus: A complementary approach to enhance management of a benthic fishery in Peru 小章鱼的种群结构和连通性：一种加强秘鲁底栖渔业管理的补充方法

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-07 DOI: 10.1016/j.rsma.2026.104760

Clara Ortiz-Alvarez , Eliana Alfaro-Cordova , Rosa María Cañedo-Apolaya , Mariela Pajuelo , Jeffrey C. Mangel , Joanna Alfaro-Shigueto , Oscar Garcia , Ximena Velez Zuazo

Sustainable fisheries require key information about species populations for sound management. The Peruvian octopus (Octopus mimus) is a species of economic importance to coastal communities, but few studies have investigated its genetic population structure and diversity along their distribution range in Peru. We examined the genetic population structure of O. mimus by assessing the genetic variability in COI and COIII genes in eight fishing locations distributed across three distinct biogeographic provinces. We found significant genetic population structure across the Peruvian coast and offshore islands, with two distinct clusters: one grouping individuals from locations within the Panamic and Transition Zone provinces and another including individuals from locations within the Peruvian province. This pattern was supported by both genetic markers. The observed genetic structure among O. mimus within Peruvian waters suggest the need to revise current management regulations. The observed differences may reflect the impact and variability of oceanographic conditions at different temporal scales and life history characteristics. Further studies should expand sampling to include additional localities along the distribution range of O. mimus to improve our understanding of this species’ connectivity, define stock boundaries and inform effective fisheries management strategies.

可持续渔业需要有关物种种群的关键信息，以便进行健全的管理。秘鲁章鱼（octopus mimus）是一种对沿海社区具有重要经济意义的物种，但很少有研究调查其在秘鲁分布范围内的遗传种群结构和多样性。通过对分布在3个不同生物地理省的8个渔点的COI和COIII基因的遗传变异性进行评估，研究了O. mimus的遗传群体结构。我们在秘鲁海岸和近海岛屿上发现了显著的遗传种群结构，有两个不同的集群：一个群体来自Panamic和过渡区省的位置，另一个包括来自秘鲁省的位置的个体。这一模式得到了两种遗传标记的支持。在秘鲁水域观察到的小水蛭的遗传结构表明有必要修订现行的管理条例。观测到的差异可能反映了不同时间尺度和生活史特征下海洋条件的影响和变率。进一步的研究应扩大采样范围，包括沿O. mimus分布范围的其他地点，以提高我们对该物种连通性的理解，确定种群边界，并为有效的渔业管理策略提供信息。

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引用次数: 0

Potential effects of organic matter-bound toxic elements on benthic foraminifera from Apalachicola Bay sediments (Florida, USA) 有机物质结合的有毒元素对阿巴拉契科拉湾沉积物（美国佛罗里达州）底栖有孔虫的潜在影响

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-07 DOI: 10.1016/j.rsma.2026.104762

Adebayo Solanke , Michael Martínez-Colón , Olugbenga T. Fajemila , Charles Jagoe

The concentrations of 12 (As, Cd, Co, Cu, Cr, Fe, Pb, Hg, Ni, Se, Ti, and Zn) potentially toxic elements (PTEs) from Apalachicola Bay were determined to assess the degree of contamination of surface sediments coupled with benthic foraminifera used as pollution bioindicators. Although the overall conditions of the bay, with respect to PTEs, are not impacted (PLI_estuary <1), the river sites are “polluted” (PLI_river >1). In addition, a “Bad” ecological quality status, based on organic matter content (4.43–12.36 %) prevailed at the bay sites and this is critical since organic-bound PTEs become readily bioavailable to benthic foraminifera. This is represented by the number of species (<6) and diversity (<1.53) values that were uncharacteristically low even for a stressed environment whose assemblage, controlled by mud-TOC (positively) and organic-bound Cd-Se (negatively), was dominated by Ammonia parkinsoniana and Cribroelphidium gunteri. Based on their respective relative abundances, the former was tolerant to organic-bound Ni-Cr-Cu while the latter was to Ni-Co-Cr-Cu-Zn. The bay is polluted with respected to Se (total concentration: 6.06–261.24 mg/kg) given its “high extreme” contamination factor (CF >6). Although the toxicological effects of Se on benthic foraminifera are unknown, its bioavailable counterparts across the bay exerted negative impacts on their ecological distribution.

测定了阿巴拉契科拉湾表层沉积物中12种（As、Cd、Co、Cu、Cr、Fe、Pb、Hg、Ni、Se、Ti和Zn）潜在有毒元素（pte）的浓度，并以底栖有孔虫为污染生物指标，对其污染程度进行了评价。虽然就pte而言，海湾的整体状况没有受到影响（PLIestuary <1），但河流场地受到了“污染”（PLIriver >1）。此外，基于有机质含量（4.43-12.36 %）的生态质量状况在海湾站点普遍存在，这是至关重要的，因为有机结合的pte很容易被底栖有孔虫生物利用。这表现在物种数量（<6）和多样性（<1.53）值异常低，即使在由泥toc（正）和有机结合Cd-Se（负）控制的组合以氨帕金森菌和Cribroelphidium gunteri为主的胁迫环境中也是如此。从相对丰度来看，前者耐有机结合的Ni-Cr-Cu，后者耐有机结合的Ni-Co-Cr-Cu-Zn。鉴于该海湾的“高极端”污染系数（CF >6），该海湾受到硒污染（总浓度：6.06-261.24 mg/kg）。虽然硒对底栖有孔虫的毒理学影响尚不清楚，但其在整个海湾的生物可利用性对应物对其生态分布产生了负面影响。

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引用次数: 0

Heavy metal contamination in sediment of mudskipper habitat along the Cox’s Bazar coast, Bay of Bengal, Bangladesh: Ecological and human health risk assessment using deterministic and probabilistic approaches 孟加拉国孟加拉湾考克斯巴扎尔沿岸弹涂鱼栖息地沉积物中的重金属污染：利用确定性和概率方法进行生态和人类健康风险评估

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-07 DOI: 10.1016/j.rsma.2026.104759

Md. Simul Bhuyan , Mohammad Ismail , A.J.M. Morshed , Md. Tariqul Islam , Vinmoy Mondal

Heavy metals (HMs) can accumulate in benthic organisms such as mudskippers, which inhabit coastal sediments, posing both ecological risks and direct threats to human health through their consumption. This study assessed HM contamination, ecological and human health risks in sediments from nine mudskipper habitats along Cox’s Bazar coast, Bangladesh. Sediments were dominated by Fe, Mn, Ni, and Zn, with lower levels of Cu, Pb, Cd, Cr, and Co. Keary Ghat and Bodir Jetty were relatively high-risk sites, though spatial differences among sites were not statistically significant (ANOVA, p > 0.05). Strong positive correlations among metals (p < 0.05) suggested common sources, and hierarchical clustering grouped sites into two major clusters based on similar HM profiles. The APCS-MLR results indicate that agriculture and aquaculture represent the largest relative contributors to sediment-associated metals in the study area; however, port activities, marine traffic, small-scale industries, and wastewater inputs also contribute, particularly at near-shore and jetty-adjacent sites. Igeo classified most metals as “practically uncontaminated,” except Cd, which exhibited moderate contamination at specific sites (Bodir Jetty and Keary Ghat), supported by EF analysis. Pollution load index remained below 1, indicating low overall contamination, and the potential ecological risk index suggested a “low ecological risk,” with Cd as the main contributor. Deterministic human health risk assessment (HHRA) indicated higher non-carcinogenic risk for children via Cr and Cd ingestion, though hazard indices were below 1 for both adults and children. Carcinogenic risk was generally acceptable, except for Cr in children. Probabilistic Monte Carlo simulations corroborated HHRA findings, highlighting Keary Ghat as a site with elevated health risk. Overall, sediments exhibit mild HM contamination, requiring ongoing monitoring of Cr and Cd for sustainable environmental management.

重金属可在底栖生物（如居住在沿海沉积物中的弹涂鱼）中积累，对其造成生态风险，并通过食用对人类健康构成直接威胁。本研究评估了孟加拉国考克斯巴扎尔海岸9个弹涂鱼栖息地沉积物中的HM污染、生态和人类健康风险。沉积物以Fe、Mn、Ni和Zn为主，Cu、Pb、Cd、Cr和Co含量较低。Keary Ghat和Bodir Jetty是相对高危的站点，但站点间的空间差异无统计学意义（方差分析，p > 0.05）。金属之间的强正相关（p < 0.05）表明有共同的来源，并且基于相似的HM概况，分层聚类将站点分为两个主要集群。APCS-MLR结果表明，农业和水产养殖是研究区沉积物相关金属的最大相对贡献者；然而，港口活动、海上交通、小规模工业和废水排放也有影响，特别是在近岸和码头附近。Igeo将大多数金属归类为“几乎未受污染”，除了Cd，它在特定地点（Bodir Jetty和Keary Ghat）显示出中度污染，这得到了EF分析的支持。污染负荷指数保持在1以下，表明总体污染程度较低，潜在生态风险指数显示为“低生态风险”，Cd是主要贡献者。确定性人类健康风险评估（HHRA）表明，尽管成人和儿童的危害指数都低于1，但通过摄入Cr和Cd，儿童的非致癌风险更高。致癌风险一般是可以接受的，除了儿童中的铬。概率蒙特卡罗模拟证实了HHRA的发现，强调Keary Ghat是健康风险升高的地点。总体而言，沉积物表现出轻微的HM污染，需要持续监测Cr和Cd以进行可持续的环境管理。

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引用次数: 0

Trophic interaction, niche overlap, and species-specific feeding responses of juvenile pleuronectid flatfishes after emigration from nursery grounds in Suo-Nada, western Seto Inland Sea, Japan 日本西濑户内海梭那达幼鱼洄游后的营养相互作用、生态位重叠和物种特异性摄食反应

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-07 DOI: 10.1016/j.rsma.2026.104761

Alvin H. Bantiquete , Tetsuo Yamada , Yui Ichikawa , Hiroyuki Sudo , Takeshi Tomiyama

Understanding the trophic interactions, niche overlap, and species-specific responses of emigrating pleuronectid juveniles provide insights into interspecific competition in shared habitats. The diet information of commercially important flatfishes in shallow nursery grounds has been well-studied in Suo-Nada, western Seto Inland Sea, Japan, whereas such information after emigration from the habitat is limited. This study aimed to reveal feeding relationships between three pleuronectid flatfishes – Pseudopleuronectes yokohamae, Platichthys bicoloratus, and Pleuronichthys lighti – and to assess seasonal changes in their feeding activity and somatic condition after emigration. As P. yokohamae and P. bicoloratus occurred in shallow nursery grounds from February to April, the post-nursery individuals were collected in the fishing ground by bottom trawl fisheries from May to August 2023. Diet composition showed that P. bicoloratus consistently consumed polychaetes, whereas P. lighti and P. yokohamae showed dietary shifts from polychaetes toward gammarids and caprellids with observed high dietary similarity between the three species. Regardless of the dietary overlap, stomach fullness decreased with the season progressed for P. yokohamae and P. bicoloratus, whereas P. lighti having a stable progression indicating different responses among the three species. Overall, feeding activity declined as the season progressed, although P. yokohamae showed pronounced mid-season increase in June before the feeding activity decreased sharply in July. These results indicate that the three pleuronectid species continue feeding after emigration from the shallow nursery grounds, but the seasonal changes in their feeding activity vary, reflecting species-specific responses to the season progression.

了解迁徙的胸膜联幼鱼的营养相互作用、生态位重叠和物种特异性反应，有助于了解共同栖息地的种间竞争。在日本濑户内海西部的梭那达，人们对具有重要商业价值的比目鱼在浅水育苗场的饮食信息进行了很好的研究，但这些信息在离开栖息地后却很有限。本研究旨在揭示三种胸鳍比目鱼（Pseudopleuronectes yokohamae， Platichthys bicoloratus和Pleuronichthys light）的摄食关系，并评估它们洄游后摄食活动和躯体状况的季节变化。2023年2 - 4月，横滨和双色斑腹鱼主要在浅水育苗场繁殖，5 - 8月在渔场采用底拖网捕捞方式采集育苗后个体。饮食结构表明，双色螯虾一贯以多毛类为食，而光螯虾和横滨螯虾的饮食结构从多毛类向伽玛类和小毛类转变，且具有较高的相似性。无论饮食重叠与否，横滨假体和双色假体的胃饱度随季节的推移而减少，而光假体的胃饱度则稳定增长，这表明三种物种对胃饱度的反应不同。总体而言，摄食活动随着季节的进展而下降，尽管横滨滨虾在6月季中出现明显的增加，但在7月摄食活动急剧下降。这些结果表明，三种胸膜联生物种在离开浅层苗圃后继续摄食，但摄食活动的季节变化不同，反映了物种对季节进展的特异性反应。

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引用次数: 0

Antimicrobial potential of marine sponges and sponge-derived actinomycetes from Mun Nork and Mun Nai Islands, Thailand 泰国门诺克和门奈群岛海洋海绵和海绵衍生放线菌的抗菌潜力

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-06 DOI: 10.1016/j.rsma.2026.104754

Trinset Weeraphan , Chollabuppha Chou , Prapasiri Bunyong , Naphatson Chanthathamrongsiri , Thanchanok Sirirak , Sumaitt Putchakarn , Swee-Cheng Lim , Wongsakorn Phongsopitanun

Antimicrobial resistance is a critical and global public health challenge, contributing to treatment failure, prolonged hospitalizations, and increased healthcare costs. Consequently, the discovery and development of new antibiotics is urgently needed. Recent studies have highlighted marine sponges as prolific sources of bioactive compounds and important reservoirs of actinomycetes, a rich source of antibiotics. In this study, 50 sponge samples were collected from Mun Nork and Mun Nai Islands in Rayong Province, Thailand, and evaluated for their antimicrobial activity and potential to harbor sponge-associated actinomycetes. Of the samples tested, 30 sponge extracts exhibited antimicrobial activity, predominantly against Gram-positive bacteria. Notably, Neopetrosia sp. (blue) demonstrated the broadest spectrum of activity, inhibiting Gram-positive and Gram-negative bacteria as well as yeast. A total of 41 actinomycete isolates were obtained from 15 sponge samples and subsequently classified into 12 genera: Micromonospora (3 isolates), Nocardia (13), Rothia (1), Isoptericola (1), Salinispora (12), Actinomycetospora (1), Pseudonocardia (1), Streptomyces (5), Mycobacterium (1), Prauserella (1), and Rhodococcus (2). Among these, three strains — Streptomyces (Strept.) althioticus RS027–1, Strept. nanshensis TR01–1, and Salinispora arenicola RS029–1 — exhibited antimicrobial activity against Kocuria rhizophila and Streptococcus pyogenes. Additionally, Salinispora arenicola RS029–1 showed broader activity, inhibiting Bacillus subtilis and Staphylococcus aureus. Based on 16S rRNA gene sequence analysis, three isolates were identified as potential novel species. The findings demonstrate that marine sponges are valuable sources of antimicrobial compounds and serve as important habitats for bioactive actinomycetes. Furthermore, marine sponges hold considerable promise for the discovery of novel actinomycete species with potential applications in future drug discovery and development.

抗菌素耐药性是一项重大的全球公共卫生挑战，导致治疗失败、住院时间延长和医疗费用增加。因此，迫切需要发现和开发新的抗生素。最近的研究强调，海洋海绵是生物活性化合物的丰富来源和放线菌的重要储存库，放线菌是抗生素的丰富来源。在这项研究中，从泰国罗勇省的门诺克岛和门奈岛收集了50个海绵样本，并评估了它们的抗菌活性和海绵相关放线菌的潜力。在测试的样品中，30种海绵提取物显示出抗菌活性，主要是针对革兰氏阳性细菌。值得注意的是，Neopetrosia sp.（蓝色）表现出最广泛的活性谱，可以抑制革兰氏阳性和革兰氏阴性细菌以及酵母。从15份海绵样品中共分离到41株放线菌，并将其分为12属：小单孢菌（3株）、诺卡菌（13株）、罗氏菌（1株）、异菌属（1株）、盐孢菌属（12株）、放线菌孢子菌属（1株）、假心菌属（1株）、链霉菌属（5株）、分枝杆菌属（1株）、Prauserella（1株）、红球菌属（2株）。其中，althioticus Streptomyces (Strept.) RS027-1、Strept.；nanshensis TR01-1和Salinispora arenicola RS029-1 -对嗜根葡萄球菌和化脓性链球菌具有抑菌活性。此外，沙nicola Salinispora RS029-1表现出更广泛的活性，可抑制枯草芽孢杆菌和金黄色葡萄球菌。通过16S rRNA基因序列分析，鉴定出3株菌株为潜在新种。这些发现表明，海洋海绵是抗菌化合物的宝贵来源，也是生物活性放线菌的重要栖息地。此外，海洋海绵对发现新的放线菌种类具有很大的希望，在未来的药物发现和开发中具有潜在的应用前景。

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引用次数: 0

First description of the emergence of targeted squid fisheries in the German North Sea demersal trawl fleet 首次描述了德国北海海底拖网船队中出现的目标鱿鱼渔业

IF 2.4 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science

Pub Date : 2026-01-01 DOI: 10.1016/j.rsma.2025.104738

Erik Sulanke , Ralf Döring , Daniel Oesterwind

As demersal fisheries in the southern North Sea are struggling for profitability, alternative high-value resources are in dire need. In the past few years, squid fishing has emerged as a profitable seasonal fishery. Due to the novelty of this fishery, detailed knowledge remains scarce, as no observer program has been facilitated yet, and catches are not reliably reported on the species level. Conclusions on the ecological and socio-economic implications of this novel strategy, therefore, remained speculative. We combined spatiotemporal hotspot data analysis and clustering techniques with onboard sampling to provide the first scientific description of this novel fishery. We identified a targeted fishery on the common squid Loligo vulgaris, taking place on highly localised fishing grounds, particularly four hotspots in the Southern North Sea and the Eastern English Channel, identified using Getis-Ord G statistics. Fishing activity followed a distinct seasonal trajectory shifting northwestwards from the beginning (October) towards the end (March) of the season. The economic relevance for the North Sea demersal fishing fleet is significant, as the share of overall revenues generated by squid rose from under 1 % in 2018–21 % in 2024. Targeted squid fishing requires considerable investments, but is, in terms of regulations, relatively open, as no quotas and only very few technical regulations apply under EU and UK law. Acknowledging the rapid increase of this fishery's economic importance, we highlight the need for commencing a strategic management process for emerging squid fisheries in the North Sea, ensuring long-term sustainability and avoiding ecological damage.

由于北海南部的底栖渔业难以盈利，因此迫切需要替代的高价值资源。在过去的几年里，鱿鱼捕捞已经成为一项有利可图的季节性渔业。由于这一渔业的新颖性，详细的知识仍然稀缺，因为还没有建立观察员计划，而且在物种水平上的渔获量也没有可靠的报告。因此，关于这项新战略的生态和社会经济影响的结论仍然是推测性的。我们将时空热点数据分析和聚类技术与船上采样相结合，首次对这种新型渔业进行了科学描述。根据Getis-Ord G统计数据，我们确定了一项针对普通鱿鱼Loligo vulgaris的目标渔业，该渔业在高度本地化的渔场进行，特别是北海南部和英吉利海峡东部的四个热点地区。捕鱼活动遵循明显的季节轨迹，从季节开始（10月）到结束（3月）向西北移动。鱿鱼对北海海底捕捞船队的经济意义重大，因为鱿鱼在总收入中所占的份额从2018年的1% %上升到2024年的1% %。有针对性的鱿鱼捕捞需要相当大的投资，但就法规而言，相对开放，因为在欧盟和英国法律下没有配额，只有很少的技术法规适用。鉴于该渔业的经济重要性迅速增加，我们强调有必要对北海新兴鱿鱼渔业启动战略管理进程，确保长期可持续性并避免生态破坏。

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引用次数: 0