ARZU KARAHAN, BERIVAN TEMIZ, ESRA ÖZTÜRK, JACOB DOUEK, BARUCH RINKEVICH
Members of the tunicates, a subphylum of marine filter-feeder chordates, inhabit all marine and oceanic habitats from the subtidal to the abyssal. Considered the closest relatives to the vertebrates, the tunicates are widely used as model organisms for evo-devo, allorecognition, senescence, and whole-body regeneration studies. However, species boundaries are poorly understood due to the high morphological and genetic plasticity that characterizes many tunicate taxa. Here, we present findings on seven tunicate species (Botrylloides israeliense, Botrylloides sp., Botryllus humilis, Botryllus schlosseri, Symplegma brakenhielmi, Polyclinum constellatum and Didemnum perlucidum) sampled from six Turkish sites at the North Eastern Mediterranean Sea and employed the mitochondrial barcoding marker (COI) for evaluating the relationships among geographically restricted and widely spread ascidian species. Species delimitation was conducted using sequences generated in the current study in addition to sequences obtained from GenBank. General morphological features and colors of colonies were recorded at sampling sites. Then, all Styelidae colonies were attached and cultured on slides in an aquaculture room, enabling the study of other features, such as zooid distributions and sizes, oral tentacle numbers, and life cycles, using stereo and light microscopes. The spicules of formalin-fixed Didemnum perlucidum samples were examined under a light microscope. Then, scientific names were assigned to all species based on the results of the species delimitation and on comparisons of the obtained COI sequences with GenBank sequences. A putative new Botrylloides species (Botrylloides sp.) from the Antalya region was revealed, with a 99% match with the COI gene of another specimen from Saudi Arabia; further waiting for detailed traditional taxonomy.
{"title":"Seven ascidian (Tunicata) species from the North Eastern Mediterranean","authors":"ARZU KARAHAN, BERIVAN TEMIZ, ESRA ÖZTÜRK, JACOB DOUEK, BARUCH RINKEVICH","doi":"10.12681/mms.32937","DOIUrl":"https://doi.org/10.12681/mms.32937","url":null,"abstract":"Members of the tunicates, a subphylum of marine filter-feeder chordates, inhabit all marine and oceanic habitats from the subtidal to the abyssal. Considered the closest relatives to the vertebrates, the tunicates are widely used as model organisms for evo-devo, allorecognition, senescence, and whole-body regeneration studies. However, species boundaries are poorly understood due to the high morphological and genetic plasticity that characterizes many tunicate taxa. Here, we present findings on seven tunicate species (Botrylloides israeliense, Botrylloides sp., Botryllus humilis, Botryllus schlosseri, Symplegma brakenhielmi, Polyclinum constellatum and Didemnum perlucidum) sampled from six Turkish sites at the North Eastern Mediterranean Sea and employed the mitochondrial barcoding marker (COI) for evaluating the relationships among geographically restricted and widely spread ascidian species. Species delimitation was conducted using sequences generated in the current study in addition to sequences obtained from GenBank. General morphological features and colors of colonies were recorded at sampling sites. Then, all Styelidae colonies were attached and cultured on slides in an aquaculture room, enabling the study of other features, such as zooid distributions and sizes, oral tentacle numbers, and life cycles, using stereo and light microscopes. The spicules of formalin-fixed Didemnum perlucidum samples were examined under a light microscope. Then, scientific names were assigned to all species based on the results of the species delimitation and on comparisons of the obtained COI sequences with GenBank sequences. A putative new Botrylloides species (Botrylloides sp.) from the Antalya region was revealed, with a 99% match with the COI gene of another specimen from Saudi Arabia; further waiting for detailed traditional taxonomy.","PeriodicalId":51128,"journal":{"name":"Mediterranean Marine Science","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135646951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Estefanía RODRÍGUEZ, Sophia COLLINS, Jordi GRINYO, Pere PUIG
A new species of sea anemone (Actiniaria, Metridioidea) is described and illustrated from cold-water coral environments at 600 m depth at the Blanes Canyon in the north-western Mediterranean Sea. Litophellia enoplosa sp. nov. is characterized by a column divisible into scapus and scapulus, the former with cuticle forming tenaculi, a mesogleal marginal sphincter muscle, more mesenteries proximally than distally arranged octomerously, and a single pair of directive mesenteries; it has strong retractor and parietobasilar muscles, and acontia with basitrichs and p-mastigophores B2a. Litophellia enoplosa sp. nov. is the second species described in the genus and it can be distinguished from the other species by the cuticle in the column, size ranges of the cnidae, and geographic and bathymetric distribution.
{"title":"Litophellia enoplosa sp. nov., a new species of sea anemone (Actiniaria, Metridioidea) from cold-water coral environments in the North-western Mediterranean Sea","authors":"Estefanía RODRÍGUEZ, Sophia COLLINS, Jordi GRINYO, Pere PUIG","doi":"10.12681/mms.33697","DOIUrl":"https://doi.org/10.12681/mms.33697","url":null,"abstract":"A new species of sea anemone (Actiniaria, Metridioidea) is described and illustrated from cold-water coral environments at 600 m depth at the Blanes Canyon in the north-western Mediterranean Sea. Litophellia enoplosa sp. nov. is characterized by a column divisible into scapus and scapulus, the former with cuticle forming tenaculi, a mesogleal marginal sphincter muscle, more mesenteries proximally than distally arranged octomerously, and a single pair of directive mesenteries; it has strong retractor and parietobasilar muscles, and acontia with basitrichs and p-mastigophores B2a. Litophellia enoplosa sp. nov. is the second species described in the genus and it can be distinguished from the other species by the cuticle in the column, size ranges of the cnidae, and geographic and bathymetric distribution.","PeriodicalId":51128,"journal":{"name":"Mediterranean Marine Science","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135899187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
VALENTINA CORRIAS, GIUSEPPE ANDREA DE LUCIA, FRANCESCO FILICIOTTO
The soundscape of the marine environment is a combination of geophony, biophony and anthropophony. Here, the soundscape of the Gulf of Oristano, a shallow inlet on the western coast of Sardinia including a special conservation area (Habitat Directive) and a national marine protected area, was investigated. Data collection was performed during July 2019, November 2019 and May 2020 using underwater acoustic equipment. The goal of this study was to characterise the ambient sound levels (Sound Pressure Level dB re 1 μPa) and describe the main soundscape components. The soundscape exhibited significant circadian and seasonal variations: the lowest and highest median SPL values were observed in the Spring (120–140 dB re 1 μPa; post-COVID-19 pandemic lockdown) and the Summer (128–150 dB re 1 μPa) respectively. Biophony was identified and characterised as dolphins’ ‘clicks’ and crustaceans’ ‘snapping’. Shrimp activity was dominant in the summer, while dolphin passages were observed across all sampling periods, accounting for 46.4% of the total recordings. Anthropophony, namely vessel passages, was predominant in the summer during the day-time and represented up to 42% of the acoustic space in the low-frequency band. Geophony increased low-frequency noise, and represented a highly variable component of the local soundscape. The marine soundscape is a valuabletool for defining integrated management plans for marine ecosystems, allowing the assessment of habitat quality, characterisation of sound sources and evaluation of the impact of anthropogenic activities.
海洋环境的声景是地声、生物声和人声的结合。在这里,奥里斯塔诺湾的音景进行了调查,奥里斯塔诺湾是撒丁岛西海岸的一个浅海湾,包括一个特殊保护区(栖息地指令)和一个国家海洋保护区。数据收集于2019年7月、2019年11月和2020年5月使用水声设备进行。本研究的目的是表征环境声级(声压级dB为1 μPa),并描述主要的声景成分。声景观表现出明显的昼夜和季节变化:声声级中值在春季最低和最高(120 ~ 140 dB / 1 μPa);新冠肺炎大流行后的封锁)和夏季(128 ~ 150 dB / 1 μPa)。生物声被认为是海豚的“咔哒声”和甲壳类动物的“咔哒声”。虾类活动在夏季占主导地位,而海豚通道在所有采样期间都观察到,占总记录的46.4%。在夏季白天,以船只通道为主,占低频声波空间的42%。地质噪声增加了低频噪声,代表了一个高度可变的局部声景组成部分。海洋声景观是制定海洋生态系统综合管理计划的宝贵工具,可用于评估生境质量、声源特征和评价人为活动的影响。
{"title":"Marine soundscape and its temporal acoustic characterisation in the Gulf of Oristano, Sardinia (Western Mediterranean Sea)","authors":"VALENTINA CORRIAS, GIUSEPPE ANDREA DE LUCIA, FRANCESCO FILICIOTTO","doi":"10.12681/mms.30322","DOIUrl":"https://doi.org/10.12681/mms.30322","url":null,"abstract":"The soundscape of the marine environment is a combination of geophony, biophony and anthropophony. Here, the soundscape of the Gulf of Oristano, a shallow inlet on the western coast of Sardinia including a special conservation area (Habitat Directive) and a national marine protected area, was investigated. Data collection was performed during July 2019, November 2019 and May 2020 using underwater acoustic equipment. The goal of this study was to characterise the ambient sound levels (Sound Pressure Level dB re 1 μPa) and describe the main soundscape components. The soundscape exhibited significant circadian and seasonal variations: the lowest and highest median SPL values were observed in the Spring (120–140 dB re 1 μPa; post-COVID-19 pandemic lockdown) and the Summer (128–150 dB re 1 μPa) respectively. Biophony was identified and characterised as dolphins’ ‘clicks’ and crustaceans’ ‘snapping’. Shrimp activity was dominant in the summer, while dolphin passages were observed across all sampling periods, accounting for 46.4% of the total recordings. Anthropophony, namely vessel passages, was predominant in the summer during the day-time and represented up to 42% of the acoustic space in the low-frequency band. Geophony increased low-frequency noise, and represented a highly variable component of the local soundscape. The marine soundscape is a valuabletool for defining integrated management plans for marine ecosystems, allowing the assessment of habitat quality, characterisation of sound sources and evaluation of the impact of anthropogenic activities.","PeriodicalId":51128,"journal":{"name":"Mediterranean Marine Science","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136237236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
ANTONIO CALÒ, ANTONIO DI FRANCO, CHARALAMPOS DIMITRIADIS, LEA PIACENTINI, PATRICIA VENTURA, ALEXIS PEY, JOSÉ ANTONIO GARCÍA-CHARTON, ERIC CHARBONNEL, VICTOR DECUGIS, FRANCESCO DE FRANCO, IVONI FOURNARI-KONSTANTINIDOU, JOSIPA GRBIN, LUKA KASTELIC, LORENZO MEROTTO, ILARIA RINAUDO, MARIE-CATHERINE MARIE-CATHERINE, FRANCISCO SOBRADO-LLOMPART, MARIA TRUJILLO-ALARCON, FEDERICO QUATTROCCHI, MARCO MILAZZO, PAOLO GUIDETTI
The small-scale fisheries (SSF) sector has attracted considerable attention over the last decade due to its major importance in sustaining the livelihoods of coastal communities worldwide, poverty alleviation, food security, social wealth and traditions. Despite this importance, quantitative and qualitative information on SSF is still largely lacking and when available, it tends to be scattered or very localized. SSF are also among the very few professional extractive activities generally allowed within Marine Protected Areas (MPAs), and are therefore expected to acquire further momentum in the near future in light of the projected increase of protected marine surface area due to international commitments. However, SSF associated with areas including MPAs may differ from those operating in unprotected contexts with regard to a range of socio-ecological aspects, thus potentially making management strategies currently in force unsuitable, and requiring the development of ad hoc local and regional policies. Here, we assessed the socio-ecological dimension of SSF operating within and around 11 Mediterranean MPAs, in six EU countries, with the aim of identifying relevant patterns that could inform policy and management relative to this fishing sector in view of the forthcoming increase of the marine surface area under protection. To do so, we have adopted a collaborative approach with fishers and combined a photo-sampling survey of 1,292 set net (mainly trammel-nets) fishing operations at landing with 149 semi-structured interviews with fishers, to gather information on features and catches of SSF fleets (e.g. vessel characteristics, gears, catch composition, catch and revenue per unit of effort). Overall, results highlighted: 1) multiple shared features emerging at regional level (i.e. among the 11 study areas), such as the predominant use of set nets, the major contribution of a limited number of species to the overall catch and revenue, the occurrence in the catch of threatened species and/or undersized individuals; 2) a variety of distinctive socio-ecological features differentiating local SSF communities such as the species mainly contributing to catch and revenue, species size distribution and fleet characteristics. In addition to presenting elements to inform common policies and strategies for SSF management in the context of MPAs, our study provides guidance for the development of a standard methodology for the full documentation of SSF in the Mediterranean Sea.
{"title":"Social-ecological features of set nets small-scale fisheries in the context of Mediterranean marine protected areas","authors":"ANTONIO CALÒ, ANTONIO DI FRANCO, CHARALAMPOS DIMITRIADIS, LEA PIACENTINI, PATRICIA VENTURA, ALEXIS PEY, JOSÉ ANTONIO GARCÍA-CHARTON, ERIC CHARBONNEL, VICTOR DECUGIS, FRANCESCO DE FRANCO, IVONI FOURNARI-KONSTANTINIDOU, JOSIPA GRBIN, LUKA KASTELIC, LORENZO MEROTTO, ILARIA RINAUDO, MARIE-CATHERINE MARIE-CATHERINE, FRANCISCO SOBRADO-LLOMPART, MARIA TRUJILLO-ALARCON, FEDERICO QUATTROCCHI, MARCO MILAZZO, PAOLO GUIDETTI","doi":"10.12681/mms.33079","DOIUrl":"https://doi.org/10.12681/mms.33079","url":null,"abstract":"The small-scale fisheries (SSF) sector has attracted considerable attention over the last decade due to its major importance in sustaining the livelihoods of coastal communities worldwide, poverty alleviation, food security, social wealth and traditions. Despite this importance, quantitative and qualitative information on SSF is still largely lacking and when available, it tends to be scattered or very localized. SSF are also among the very few professional extractive activities generally allowed within Marine Protected Areas (MPAs), and are therefore expected to acquire further momentum in the near future in light of the projected increase of protected marine surface area due to international commitments. However, SSF associated with areas including MPAs may differ from those operating in unprotected contexts with regard to a range of socio-ecological aspects, thus potentially making management strategies currently in force unsuitable, and requiring the development of ad hoc local and regional policies. Here, we assessed the socio-ecological dimension of SSF operating within and around 11 Mediterranean MPAs, in six EU countries, with the aim of identifying relevant patterns that could inform policy and management relative to this fishing sector in view of the forthcoming increase of the marine surface area under protection. To do so, we have adopted a collaborative approach with fishers and combined a photo-sampling survey of 1,292 set net (mainly trammel-nets) fishing operations at landing with 149 semi-structured interviews with fishers, to gather information on features and catches of SSF fleets (e.g. vessel characteristics, gears, catch composition, catch and revenue per unit of effort). Overall, results highlighted: 1) multiple shared features emerging at regional level (i.e. among the 11 study areas), such as the predominant use of set nets, the major contribution of a limited number of species to the overall catch and revenue, the occurrence in the catch of threatened species and/or undersized individuals; 2) a variety of distinctive socio-ecological features differentiating local SSF communities such as the species mainly contributing to catch and revenue, species size distribution and fleet characteristics. In addition to presenting elements to inform common policies and strategies for SSF management in the context of MPAs, our study provides guidance for the development of a standard methodology for the full documentation of SSF in the Mediterranean Sea.","PeriodicalId":51128,"journal":{"name":"Mediterranean Marine Science","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134913787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
The honeycomb stingray Himantura uarnak (Gmelin, 1789) is one of the non-indigenous species in habiting eastern Mediterranean Sea. A single pregnant female was accidentally captured in March 2022 in the commercial purse seiner fishing. The taxonomic identification of this species has been confirmed by using DNA barcoding. The present study provides the first account of a gravid female and near term embryos H. uarnak, captured off the coast of Mersin Bay, Türkiye. Data of near term embryos, suggests that parturition occurred in either end of March or early April.
{"title":"Pregnant female and near term embryos of the honeycomb stingray Himantura uarnak (Chondrichthyes – Dasyatidae) from Mersin Bay, northeastern Mediterranean","authors":"NURI BASUSTA, ASIYE BAŞUSTA","doi":"10.12681/mms.31158","DOIUrl":"https://doi.org/10.12681/mms.31158","url":null,"abstract":"The honeycomb stingray Himantura uarnak (Gmelin, 1789) is one of the non-indigenous species in habiting eastern Mediterranean Sea. A single pregnant female was accidentally captured in March 2022 in the commercial purse seiner fishing. The taxonomic identification of this species has been confirmed by using DNA barcoding. The present study provides the first account of a gravid female and near term embryos H. uarnak, captured off the coast of Mersin Bay, Türkiye. Data of near term embryos, suggests that parturition occurred in either end of March or early April.","PeriodicalId":51128,"journal":{"name":"Mediterranean Marine Science","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134913789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
The red-spotted grouper nervous necrosis virus (RGNNV) genotype of Betanodavirus causes significant losses to the European sea bass aquaculture industry. The lack of widely available vaccines against this genotype has led researchers and the industry to investigate other avenues for reducing mortality caused by the disease, such as the selection of resistant stocks. The objectives of this study were: a) to assess the presence of natural resistance in sea bass families propagated in the genetic improvement program of Nireus S.A., Greece and, b) to test an ELISA method able to detect viral coat antigen and measure viral load in the brain of tested fish. The second objective was to investigate virus antigen fluctuations during the course of the infection and its correlation with disease development, mortality and resistance. Further aspects of disease pathogenesis were investigated. A population of sea bass consisting of 89 families was experimentally infected with an RGNNV genotype of Betanodavirus; mortalities were recorded and brain samples from dead and survived fish were collected. Experimental infection of fish resulted in a typical pattern of mortality development that reached 56%. Different levels of natural resistance between families were found with cumulative mortality ranging from 20% to 86.2%. There was no statistical difference between the weight of dead fish and the resistant and susceptible families, except when extreme phenotypes were tested, indicating that the weight of fish that died was not a significant factor of final mortality. Brain virus load in the population as a whole increased sharply until D6 post-infection and then gradually dropped until the end of the experiment. When the viral load in the population (dead and survived fish) was tested against time of death, no correlation was found. In fish that survived the infection, the virus load remained high. The viral load per mg of brain tissue in samples taken from dead fish was not a factor that influenced family cumulative % mortality. Brain samples from survived fish reproduced the disease after infection of healthy fish. This study revealed a natural resistance of sea bass to Betanodavirus infection. This important finding can be used as an additional tool in reducing the mortality of cultured stocks. Additionally, there was clear evidence that fish surviving infection become subclinical carriers of the pathogen. Apparently, survival may not be associated with mechanisms of viral clearance but to other mechanisms that may suspend viral replication or aid infected cell endurance. These findings may assist in developing future vaccines and stock selection. A combination of effective vaccination and resistant stocks could be the way ahead.
{"title":"Correlations of betanodavirus load in the brain of experimentally infected sea bass (Dicentrarchus labrax, L.) with varying levels of resistance to viral nervous necrosis","authors":"VASILEIOS BAKOPOULOS, ANASTASIA PANAGIOTAKI, MICHAIL-AGGELOS VALSAMIDIS, DANIELLA-MARI WHITE, LEONIDAS PAPAHARISIS, ARKADIOS DIMITROGLOU, ELLI KAKAVA","doi":"10.12681/mms.34425","DOIUrl":"https://doi.org/10.12681/mms.34425","url":null,"abstract":"The red-spotted grouper nervous necrosis virus (RGNNV) genotype of Betanodavirus causes significant losses to the European sea bass aquaculture industry. The lack of widely available vaccines against this genotype has led researchers and the industry to investigate other avenues for reducing mortality caused by the disease, such as the selection of resistant stocks. The objectives of this study were: a) to assess the presence of natural resistance in sea bass families propagated in the genetic improvement program of Nireus S.A., Greece and, b) to test an ELISA method able to detect viral coat antigen and measure viral load in the brain of tested fish. The second objective was to investigate virus antigen fluctuations during the course of the infection and its correlation with disease development, mortality and resistance. Further aspects of disease pathogenesis were investigated. A population of sea bass consisting of 89 families was experimentally infected with an RGNNV genotype of Betanodavirus; mortalities were recorded and brain samples from dead and survived fish were collected. Experimental infection of fish resulted in a typical pattern of mortality development that reached 56%. Different levels of natural resistance between families were found with cumulative mortality ranging from 20% to 86.2%. There was no statistical difference between the weight of dead fish and the resistant and susceptible families, except when extreme phenotypes were tested, indicating that the weight of fish that died was not a significant factor of final mortality. Brain virus load in the population as a whole increased sharply until D6 post-infection and then gradually dropped until the end of the experiment. When the viral load in the population (dead and survived fish) was tested against time of death, no correlation was found. In fish that survived the infection, the virus load remained high. The viral load per mg of brain tissue in samples taken from dead fish was not a factor that influenced family cumulative % mortality. Brain samples from survived fish reproduced the disease after infection of healthy fish. This study revealed a natural resistance of sea bass to Betanodavirus infection. This important finding can be used as an additional tool in reducing the mortality of cultured stocks. Additionally, there was clear evidence that fish surviving infection become subclinical carriers of the pathogen. Apparently, survival may not be associated with mechanisms of viral clearance but to other mechanisms that may suspend viral replication or aid infected cell endurance. These findings may assist in developing future vaccines and stock selection. A combination of effective vaccination and resistant stocks could be the way ahead.","PeriodicalId":51128,"journal":{"name":"Mediterranean Marine Science","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136363830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Sarra Labidi, M. Vázquez‐Luis, G. Catanese, Amalia Grau, Marwa Khammassi, Soumaya BEN YOUSSEF, M. Achouri
Pinna nobilis (Linnaeus, 1758) populations have been severely damaged in the last few decades, and since early autumn 2016, a mass mortality event (MME) has drastically impacted populations in the Mediterranean Sea. Accordingly, the aim of the present study was to improve the knowledge on the status of P. nobilis populations in the Bizerte Lagoon (Tunisia) between 2016 and 2022. Before the MME, P. nobilis was found in the lagoon at depths from 1.5 to 6 m, with a density ranging from 2 to 30 ind/100 m². After the MME, mortality reached 100% in the monitored area, except in the eastern part of the Bizerte Lagoon near the Menzel Jemil site, where some living specimens were detected. Moreover, in 2022, successful recruitment was observed in the lagoon. Additionally, our results revealed the presence of Haplosporidium pinnae and Mycobacterium sp. in some living specimens sampled in the Bizerte Lagoon after the MME. This finding constitutes the first detection of both pathogens in Tunisia and in the entire Southern Mediterranean Sea.
{"title":"First detection of the invasive protozoan Haplosporidium pinnae in the critically endangered bivalve Pinna nobilis in the Southern Mediterranean Sea (Bizerte Lagoon, Tunis) and update of its current status","authors":"Sarra Labidi, M. Vázquez‐Luis, G. Catanese, Amalia Grau, Marwa Khammassi, Soumaya BEN YOUSSEF, M. Achouri","doi":"10.12681/mms.31664","DOIUrl":"https://doi.org/10.12681/mms.31664","url":null,"abstract":"Pinna nobilis (Linnaeus, 1758) populations have been severely damaged in the last few decades, and since early autumn 2016, a mass mortality event (MME) has drastically impacted populations in the Mediterranean Sea. Accordingly, the aim of the present study was to improve the knowledge on the status of P. nobilis populations in the Bizerte Lagoon (Tunisia) between 2016 and 2022. Before the MME, P. nobilis was found in the lagoon at depths from 1.5 to 6 m, with a density ranging from 2 to 30 ind/100 m². After the MME, mortality reached 100% in the monitored area, except in the eastern part of the Bizerte Lagoon near the Menzel Jemil site, where some living specimens were detected. Moreover, in 2022, successful recruitment was observed in the lagoon. Additionally, our results revealed the presence of Haplosporidium pinnae and Mycobacterium sp. in some living specimens sampled in the Bizerte Lagoon after the MME. This finding constitutes the first detection of both pathogens in Tunisia and in the entire Southern Mediterranean Sea.","PeriodicalId":51128,"journal":{"name":"Mediterranean Marine Science","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47548622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
A single specimen of the xanthid Liomera rugipes was collected in May 2023 in the waters off Alexandria, Egypt, with a trammel net at 15 m of depth. The occurrence of this crab is reported for the first time in the Mediterranean Sea and adds a new Indo- West Pacific crab to the non-indigenous biota of the basin, probably introduced via the Suez Canal. This new finding increases the number of Egyptian non-indigenous brachyurans to 21 species.
{"title":"Liomera rugipes (Heller, 1861) (Brachyura: Xanthidae: Liomerinae): a new Indo-West Pacific crab in the Mediterranean Sea, Egypt","authors":"O. Nour, B. Zava, M. Corsini-Foka","doi":"10.12681/mms.34704","DOIUrl":"https://doi.org/10.12681/mms.34704","url":null,"abstract":"A single specimen of the xanthid Liomera rugipes was collected in May 2023 in the waters off Alexandria, Egypt, with a trammel net at 15 m of depth. The occurrence of this crab is reported for the first time in the Mediterranean Sea and adds a new Indo- West Pacific crab to the non-indigenous biota of the basin, probably introduced via the Suez Canal. This new finding increases the number of Egyptian non-indigenous brachyurans to 21 species.","PeriodicalId":51128,"journal":{"name":"Mediterranean Marine Science","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48172649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
H. Lubinevsky, Moshe Tom, Jordi Corbera, P. Koulouri
The present study provides a zoogeographic and faunistic update on the cumacean species that inhabit the soft substrate habitats of the Israeli waters of the Mediterranean Sea. Published and new unpublished cumacean records are both used to enable an overview of a 74-year period of species composition and distribution, providing a broad perspective of temporal faunistic changes. As a result, 43 cumacean species have now been recorded from the Mediterranean coast of Israel. Previously unpublished results, starting from 2013, were derived from intensified sampling of the continental shelf and slope as well as the bathyal plain, and revealed eight new species records for the eastern part of the Mediterranean Sea. The cumacean community included species primarily of the Mediterranean zoogeographic province with several Mediterranean-Atlantic examples. Three species, postulated to be of Indo-Pacific origin were also previously recorded on the continental shelf of the area. Finally, species composition and structure of the continental shelf indicated spatial and temporal changes between 2010 – 2021, partly due to different sampling methods as well as anthropogenic activities that took place in the area. The continental slope and the bathyal plain seem to remain as relatively stable environments.
{"title":"Spatial and temporal community composition changes of Cumacea (Crustacea: Malacostraca: Peracarida) from the soft-sediment habitats of the Mediterranean coast of Israel","authors":"H. Lubinevsky, Moshe Tom, Jordi Corbera, P. Koulouri","doi":"10.12681/mms.34247","DOIUrl":"https://doi.org/10.12681/mms.34247","url":null,"abstract":"The present study provides a zoogeographic and faunistic update on the cumacean species that inhabit the soft substrate habitats of the Israeli waters of the Mediterranean Sea. Published and new unpublished cumacean records are both used to enable an overview of a 74-year period of species composition and distribution, providing a broad perspective of temporal faunistic changes. As a result, 43 cumacean species have now been recorded from the Mediterranean coast of Israel. Previously unpublished results, starting from 2013, were derived from intensified sampling of the continental shelf and slope as well as the bathyal plain, and revealed eight new species records for the eastern part of the Mediterranean Sea. The cumacean community included species primarily of the Mediterranean zoogeographic province with several Mediterranean-Atlantic examples. Three species, postulated to be of Indo-Pacific origin were also previously recorded on the continental shelf of the area. Finally, species composition and structure of the continental shelf indicated spatial and temporal changes between 2010 – 2021, partly due to different sampling methods as well as anthropogenic activities that took place in the area. The continental slope and the bathyal plain seem to remain as relatively stable environments.\u0000 ","PeriodicalId":51128,"journal":{"name":"Mediterranean Marine Science","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44740062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Hiba REZZAG MAHCENE, T. F. Villalobos-Guerrero, Güley Kurt, F. Denis, T. Daas
This study uses morphological and molecular evidence to describe a new intertidal species of Perinereis Kinberg, 1865 (Annelida: Nereididae) from northeast Algeria. Perinereis louizomarum n. sp. belongs to Subgroup 1A, which is distinguished by a single bar shaped paragnath on area VI of the proboscis and a dorsal ligule that is either slightly or not expanded in the posterior parapodia. The new species differs from P. cultrifera and similar congeners by having a bare area V and slightly enlarged posterior dorsal ligules. Furthermore, using newly generated and mined sequences from online databases, and mined sequences of Perinereis species from online, the analysis of cytochrome c oxidase subunit 1 (COI) mitochondrial gene sequences supported its status as new species. An identification key of the Perinereis species belonging to Subgroup 1A is also provided.
{"title":"A new species of Perinereis Kinberg, 1865 (Annelida: Nereididae) from the Western Mediterranean Sea revealed by morphological and molecular approaches","authors":"Hiba REZZAG MAHCENE, T. F. Villalobos-Guerrero, Güley Kurt, F. Denis, T. Daas","doi":"10.12681/mms.33969","DOIUrl":"https://doi.org/10.12681/mms.33969","url":null,"abstract":"This study uses morphological and molecular evidence to describe a new intertidal species of Perinereis Kinberg, 1865 (Annelida: Nereididae) from northeast Algeria. Perinereis louizomarum n. sp. belongs to Subgroup 1A, which is distinguished by a single bar shaped paragnath on area VI of the proboscis and a dorsal ligule that is either slightly or not expanded in the posterior parapodia. The new species differs from P. cultrifera and similar congeners by having a bare area V and slightly enlarged posterior dorsal ligules. Furthermore, using newly generated and mined sequences from online databases, and mined sequences of Perinereis species from online, the analysis of cytochrome c oxidase subunit 1 (COI) mitochondrial gene sequences supported its status as new species. An identification key of the Perinereis species belonging to Subgroup 1A is also provided.","PeriodicalId":51128,"journal":{"name":"Mediterranean Marine Science","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44310362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}