Food-deprivation state (fed, fasted, starved) affected rock crabs physiological and biochemical responses to hypoxia in Cancer irroratus. Fasted and starved crabs were better adapted to deal with hypoxia than fed animals; however, avoidance behavior is usually considered as the first defense to environmental stressors for decapod crustaceans. We examined the effects of food deprivation on the crab’s behavior to hypoxia using the Loligo® shuttle box system, an automated system with a pair of connected water chambers with regulated flow and oxygen level. Crabs (starved, fasted and fed) that were offered a choice of two different oxygen saturations did not appear to actively avoid the hypoxia regimes tested (50% and 20% oxygen saturation). We used novel algorithms to analyze the data and found that crabs altered rheotaxis (movement towards or away from a current of water) and corresponding moving speed as a function of oxygen saturation. The food-deprivation state did influence thigmotaxis (contact with walls/objects when exploring an open space): starved crabs became bolder and more likely to explore open areas of the apparatus. Technological advancements such as the fully automated shuttle box have improved our ability to collect and analyze behavioral data; however, our study also highlighted some of the potential problems of relying solely on such apparatus to study the behavior of benthic crustaceans.
{"title":"Use of the shuttle box system to determine the effects of hypoxia and food deprivation on the behavioral responses of the rock crab Cancer irroratus Say, 1817 (Decapoda: Brachyura: Cancridae)","authors":"Qiwu Jiang, I. McGaw","doi":"10.1093/jcbiol/ruad027","DOIUrl":"https://doi.org/10.1093/jcbiol/ruad027","url":null,"abstract":"\u0000 Food-deprivation state (fed, fasted, starved) affected rock crabs physiological and biochemical responses to hypoxia in Cancer irroratus. Fasted and starved crabs were better adapted to deal with hypoxia than fed animals; however, avoidance behavior is usually considered as the first defense to environmental stressors for decapod crustaceans. We examined the effects of food deprivation on the crab’s behavior to hypoxia using the Loligo® shuttle box system, an automated system with a pair of connected water chambers with regulated flow and oxygen level. Crabs (starved, fasted and fed) that were offered a choice of two different oxygen saturations did not appear to actively avoid the hypoxia regimes tested (50% and 20% oxygen saturation). We used novel algorithms to analyze the data and found that crabs altered rheotaxis (movement towards or away from a current of water) and corresponding moving speed as a function of oxygen saturation. The food-deprivation state did influence thigmotaxis (contact with walls/objects when exploring an open space): starved crabs became bolder and more likely to explore open areas of the apparatus. Technological advancements such as the fully automated shuttle box have improved our ability to collect and analyze behavioral data; however, our study also highlighted some of the potential problems of relying solely on such apparatus to study the behavior of benthic crustaceans.","PeriodicalId":54850,"journal":{"name":"Journal of Crustacean Biology","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49303967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nathali Martínez-Salazar, Rodolfo De los Santos-Romero, C. Álvarez‐González, R. Martínez‐García, Marcelo U. García-Guerrero
The freshwater longarm river prawn (Macrobrachium tenellumSmith, 1871) is common in the coastal lagoons and freshwater bodies of the Mexican Pacific region. Its potential for aquaculture has been investigated recently, including evaluating its nutritional needs by investigating the digestive enzymatic activity of wild and culture individuals. We collected wild prawns from three different habitats and fed two laboratory-prepared diets and a commercial food for two months. The levels of lipase, trypsin, and leucine aminopeptidase were measured at the time of sampling and after one and two months of culture. Survival and growth were also recorded. It was observed that food consumption during culture causes a significant increase in growth and survival as well as a tendency towards an increase in the digestive enzymatic activity with time. The habitat of origin can also influence performance in digestion from the start.
{"title":"Variations in the activity of proteolytic and lipidic enzymes of wild and cultured individuals of the prawn Macrobrachium tenellum Smith, 1871 (Decapoda: Caridea: Palaemonidae) fed with different diets","authors":"Nathali Martínez-Salazar, Rodolfo De los Santos-Romero, C. Álvarez‐González, R. Martínez‐García, Marcelo U. García-Guerrero","doi":"10.1093/jcbiol/ruad024","DOIUrl":"https://doi.org/10.1093/jcbiol/ruad024","url":null,"abstract":"\u0000 The freshwater longarm river prawn (Macrobrachium tenellumSmith, 1871) is common in the coastal lagoons and freshwater bodies of the Mexican Pacific region. Its potential for aquaculture has been investigated recently, including evaluating its nutritional needs by investigating the digestive enzymatic activity of wild and culture individuals. We collected wild prawns from three different habitats and fed two laboratory-prepared diets and a commercial food for two months. The levels of lipase, trypsin, and leucine aminopeptidase were measured at the time of sampling and after one and two months of culture. Survival and growth were also recorded. It was observed that food consumption during culture causes a significant increase in growth and survival as well as a tendency towards an increase in the digestive enzymatic activity with time. The habitat of origin can also influence performance in digestion from the start.","PeriodicalId":54850,"journal":{"name":"Journal of Crustacean Biology","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48282651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Cumberlidge, Julia B Soma, Ellen M Leever, S. Daniels
Nheena n. gen. is established to accommodate the Madagascan freshwater crab Hydrothelphusa vencesi Cumberlidge, Marijnissen & Thompson, 2007 that was formerly included in Hydrothelphusa A. Milne-Edwards, 1872. In addition, N. museonatoran. sp. and N. artiareginan. sp. are established and these new taxa are recognized based on a combination of morphological characters and previous molecular data; are all illustrated. The three species assigned to Nheenan. gen. are compared with each other and with other species of freshwater crabs found in Madagascar, and a map of their distribution is included.
{"title":"A new genus of Madagascan freshwater crab to accommodate Hydrothelphusa vencesi Cumberlidge, Marijnissen & Thompson, 2007 (Brachyura: Potamoidea: Deckeniidae), and the description of two new congeners","authors":"N. Cumberlidge, Julia B Soma, Ellen M Leever, S. Daniels","doi":"10.1093/jcbiol/ruad021","DOIUrl":"https://doi.org/10.1093/jcbiol/ruad021","url":null,"abstract":"\u0000 Nheena n. gen. is established to accommodate the Madagascan freshwater crab Hydrothelphusa vencesi Cumberlidge, Marijnissen & Thompson, 2007 that was formerly included in Hydrothelphusa A. Milne-Edwards, 1872. In addition, N. museonatoran. sp. and N. artiareginan. sp. are established and these new taxa are recognized based on a combination of morphological characters and previous molecular data; are all illustrated. The three species assigned to Nheenan. gen. are compared with each other and with other species of freshwater crabs found in Madagascar, and a map of their distribution is included.","PeriodicalId":54850,"journal":{"name":"Journal of Crustacean Biology","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49218722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Parabathynellidae, Arisubathynella pocheonensis. sp. nov. from a hyporheic zone of a stream in South Korea. The new species is morphologically distinguished from its congeners by having five teeth on the incisor process in the mandible, and four teeth on the dentate lobe of male thoracopod VIII. The species description is supplemented with molecular information in the form of 18S rRNA and partial CO1 gene sequences. Additionally, the phylogenetic relationships among 15 parabathynellid genera from Europe, America, Australia, India, Thailand, Vietnam, and South Korea are inferred on the basis of 18S rRNA sequences. Members of ArisubathynellaPark & Eun, 2012, AllobathynellaMorimoto & Miura, 1957, and EobathynellaBirstein & Ljovuschkin, 1964 from South Korea belong to two separate geographical clades: Arisubathynella to the European-North American clade and the others to the East Asian clade.
{"title":"A new subterranean species of Arisubathynella Park & Eun, 2012 (Crustacea: Bathynellacea: Parabathynellidae) from South Korea, with remarks on the phylogenetic relationships among 15 parabathynellid genera","authors":"Su-Jung Ji, G. Min","doi":"10.1093/jcbiol/ruad022","DOIUrl":"https://doi.org/10.1093/jcbiol/ruad022","url":null,"abstract":"\u0000 Parabathynellidae, Arisubathynella pocheonensis. sp. nov. from a hyporheic zone of a stream in South Korea. The new species is morphologically distinguished from its congeners by having five teeth on the incisor process in the mandible, and four teeth on the dentate lobe of male thoracopod VIII. The species description is supplemented with molecular information in the form of 18S rRNA and partial CO1 gene sequences. Additionally, the phylogenetic relationships among 15 parabathynellid genera from Europe, America, Australia, India, Thailand, Vietnam, and South Korea are inferred on the basis of 18S rRNA sequences. Members of ArisubathynellaPark & Eun, 2012, AllobathynellaMorimoto & Miura, 1957, and EobathynellaBirstein & Ljovuschkin, 1964 from South Korea belong to two separate geographical clades: Arisubathynella to the European-North American clade and the others to the East Asian clade.","PeriodicalId":54850,"journal":{"name":"Journal of Crustacean Biology","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48111279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the 1950s, the Danish Galathea Expedition undertook one of the first and most comprehensive explorations of our ocean’s hadal zone, depths extending from 6,000 to nearly 11,000 m, and presented a rich collection of the diversity of Amphipoda. The subsequent papers, however, concluded that these established ‘nothing essentially new’ to the existing knowledge of amphipod biology. Since Dahl’s foundational paper in 1959, amphipods, primarily from the superfamilies Lysianassoidea and Alicelloidea, emerged as one of the best-sampled hadal fauna, as these mobile invertebrates are readily recovered by different sampling techniques. Importantly, amphipods have become the model taxon, helping us to unlock knowledge about life in the hadal zone. In this review, we collate the knowledge gained since the Galathea Expedition and summarise the current understanding of how amphipods that appear during hadal exploration survive the trench environments. We discuss population structures across depth, inter-trench distribution and connectivity, applications in hadal microbiology, and, critically, how the hadal zone is being impacted by anthropogenic activity.
{"title":"Amphipoda from depths exceeding 6,000 meters revisited 60 years on","authors":"A. Jamieson, J. Weston","doi":"10.1093/jcbiol/ruad020","DOIUrl":"https://doi.org/10.1093/jcbiol/ruad020","url":null,"abstract":"\u0000 In the 1950s, the Danish Galathea Expedition undertook one of the first and most comprehensive explorations of our ocean’s hadal zone, depths extending from 6,000 to nearly 11,000 m, and presented a rich collection of the diversity of Amphipoda. The subsequent papers, however, concluded that these established ‘nothing essentially new’ to the existing knowledge of amphipod biology. Since Dahl’s foundational paper in 1959, amphipods, primarily from the superfamilies Lysianassoidea and Alicelloidea, emerged as one of the best-sampled hadal fauna, as these mobile invertebrates are readily recovered by different sampling techniques. Importantly, amphipods have become the model taxon, helping us to unlock knowledge about life in the hadal zone. In this review, we collate the knowledge gained since the Galathea Expedition and summarise the current understanding of how amphipods that appear during hadal exploration survive the trench environments. We discuss population structures across depth, inter-trench distribution and connectivity, applications in hadal microbiology, and, critically, how the hadal zone is being impacted by anthropogenic activity.","PeriodicalId":54850,"journal":{"name":"Journal of Crustacean Biology","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42552544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Branchinecta serrata Rogers, 2006 was originally thought to be limited to four localities in the central USA. We present new records of this species in prairie pools in central Canada, greatly extending its known distribution. Previous records from Canada were misidentified as the common and widespread B. paludosa (Müller, 1788). We present images emphasizing the differences between the two species, updated geochemical tolerance data, and revise the conservation status of B. serrata. Finally, we present an identification key to the Branchinecta paludosa species group.
{"title":"Canadian records of Branchinecta serrata Rogers, 2006 and its confusion with B. paludosa (Müller, 1788) (Branchiopoda: Anostraca: Branchinectidae), with a key to the B. paludosa species group","authors":"D. Rogers, Ian R. Gardiner","doi":"10.1093/jcbiol/ruad025","DOIUrl":"https://doi.org/10.1093/jcbiol/ruad025","url":null,"abstract":"\u0000 Branchinecta serrata Rogers, 2006 was originally thought to be limited to four localities in the central USA. We present new records of this species in prairie pools in central Canada, greatly extending its known distribution. Previous records from Canada were misidentified as the common and widespread B. paludosa (Müller, 1788). We present images emphasizing the differences between the two species, updated geochemical tolerance data, and revise the conservation status of B. serrata. Finally, we present an identification key to the Branchinecta paludosa species group.","PeriodicalId":54850,"journal":{"name":"Journal of Crustacean Biology","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45213032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kamran Rezaei Tavabe, Bahareh Samadi Kuchaksaraei, Sina Javanmardi
Abstract Nanomaterials (NMs) mainly settle on bottom sediments and accumulate in the benthos of aquatic communities. Decapod crustaceans, being deposit-omnivorous feeders, are appropriate biological models to assay the biological effects of NMs. The present study evaluated the effects of ZnO and multi-walled carbon nanotubes (MWCNTs) NMs separately and in combination on the activities of antioxidant enzymes on crustacean hyperglycemic hormone (CHH), hematology, reproductive performance, and hepatopancreas lesions the Oriental river prawn, Macrobrachium nipponense De Haan, 1849 [De Haan, 1833–1850]. We essayed concentrations of ZnO (0, 1, 10, 30, 50 mg l–1) and MWCNTs (0, 5, 10, 15, 20 mg l–1) and two higher concentrations of the NMs were compared in combined treatments. Both NMs showed dose-dependent effects on reproductive parameters of M. nipponense, especially the fertilization rate of eggs. Inter-molt and inter-spawn periods were postponed and reproduction stopped in 50 ppm ZnO and 15 and 20 ppm MWCNTs treatments. Our findings showed that the release of crustacean hyperglycemic hormone (CHH) and superoxide dismutase (SOD) enzyme activity are directly related to the NMs levels independently as well as in combination. NMs did not show any effect on the activities of alanine transaminase (ALT) and aspartate transaminase (AST) enzymes in muscle tissue independently, but the combined effects of the activities of these enzymes were significant. NMs caused hepatocyte enlargement, melanization, apoptosis, and necrosis damages in the hepatopancreas of prawns. The findings showed that ZnO and MWCNTs NMs have strong adverse biological effects on M. nipponense, and that this species is an appropriate bio-indicator and bio-monitor organism for NMs contaminations in the freshwater aquatic environments.
{"title":"Impacts of ZnO and multi-walled carbon nanotubes (MWCNTs) on biological parameters of the Oriental river prawn <i>Macrobrachium nipponense</i> De Haan, 1849 (Decapoda: Caridea: Palaemonidae)","authors":"Kamran Rezaei Tavabe, Bahareh Samadi Kuchaksaraei, Sina Javanmardi","doi":"10.1093/jcbiol/ruad019","DOIUrl":"https://doi.org/10.1093/jcbiol/ruad019","url":null,"abstract":"Abstract Nanomaterials (NMs) mainly settle on bottom sediments and accumulate in the benthos of aquatic communities. Decapod crustaceans, being deposit-omnivorous feeders, are appropriate biological models to assay the biological effects of NMs. The present study evaluated the effects of ZnO and multi-walled carbon nanotubes (MWCNTs) NMs separately and in combination on the activities of antioxidant enzymes on crustacean hyperglycemic hormone (CHH), hematology, reproductive performance, and hepatopancreas lesions the Oriental river prawn, Macrobrachium nipponense De Haan, 1849 [De Haan, 1833–1850]. We essayed concentrations of ZnO (0, 1, 10, 30, 50 mg l–1) and MWCNTs (0, 5, 10, 15, 20 mg l–1) and two higher concentrations of the NMs were compared in combined treatments. Both NMs showed dose-dependent effects on reproductive parameters of M. nipponense, especially the fertilization rate of eggs. Inter-molt and inter-spawn periods were postponed and reproduction stopped in 50 ppm ZnO and 15 and 20 ppm MWCNTs treatments. Our findings showed that the release of crustacean hyperglycemic hormone (CHH) and superoxide dismutase (SOD) enzyme activity are directly related to the NMs levels independently as well as in combination. NMs did not show any effect on the activities of alanine transaminase (ALT) and aspartate transaminase (AST) enzymes in muscle tissue independently, but the combined effects of the activities of these enzymes were significant. NMs caused hepatocyte enlargement, melanization, apoptosis, and necrosis damages in the hepatopancreas of prawns. The findings showed that ZnO and MWCNTs NMs have strong adverse biological effects on M. nipponense, and that this species is an appropriate bio-indicator and bio-monitor organism for NMs contaminations in the freshwater aquatic environments.","PeriodicalId":54850,"journal":{"name":"Journal of Crustacean Biology","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135802421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We report on the freshwater crabs of the families Potamidae, Gecarcinucidae, and Sesarmidae in the archipelago of Anambas and Natuna Islands in Indonesia. Five genera (one new) and eight species (four new) are now recorded from the islands. For the Potamidae, a new genus and a new species, Natunamon indonesicumn. sp., is described from Natuna; the taxon has diagnostic characters intermediate between IsolapotamonBott, 1968 and IbanumNg, 1995 from Borneo. A new species of Isolapotamon, I. remotumn. sp., is also described from Anambas; this is the first record of the genus outside Borneo and Mindanao, Philippines. For the Gecarcinucidae, the rare Balssiathelphusa natunaensisBott, 1970 is collected for the first time since its description, although the type was collected over 120 years ago; the species is redescribed in detail and the composition of the genus discussed. The widely distributed gecarcinucid, Parathelphusa maculataDe Man, 1879 is also recorded from Anambas and Natuna. Four species of Sesarmidae are reported: Geosesarma insulare Ng, 1986 (from Anambas), G. teschi Ng, 1986 (from Natuna), G. anambasn. sp. (from Anambas) and G. hashimin. sp. (from Natuna). Geosesarma hashimin. sp. is an arboreal species with a suite of atypical characters that suggest its present classification in Geosesarma needs to be reassessed.
我们报道了印度尼西亚阿南巴斯群岛和纳土纳群岛的Potamidae、Gecarcinucidae和Sesarmidae科的淡水蟹。岛上目前记录了五属（一新）和八种（四新）。对于马铃薯科，一个新属和一个新物种，印度紫檀。sp.，描述自Natuna；分类单元的诊断特征介于婆罗洲的IsolapotamonBott，1968和IbanumNg，1995之间。一新种Isolapotamon，I.remotum。sp.，也描述自Anambas；这是该属在婆罗洲和菲律宾棉兰老岛以外的首次记录。对于Gecarcinucidae，罕见的Balssiathelphusa natunaensisBott，1970年，自其描述以来首次被收集，尽管该类型是在120多年前收集的；详细描述了该种，并讨论了该属的组成。广泛分布的壁虎Parathelphusa maculata De Man，1879年也记录于Anambas和Natuna。报道了芝麻科的四个物种：Geossarma insulate Ng，1986年（来自Anambas），G.teschi Ng，86年（来自Natuna），G.anambasn。sp.（来自Anambas）和G.hashimin。sp.（来自纳土纳）。Geoesarma hashimin。sp.是一种树栖物种，具有一系列非典型特征，这表明其目前在Geoesarma中的分类需要重新评估。
{"title":"The freshwater Brachyura (Decapoda: Potamidae, Gecarcinucidae, Sesarmidae) of the Anambas and Natuna Islands, Kepulauan Riau Province, Indonesia","authors":"Peter K. L. Ng, D. Wowor, D. Yeo","doi":"10.1093/jcbiol/ruad012","DOIUrl":"https://doi.org/10.1093/jcbiol/ruad012","url":null,"abstract":"We report on the freshwater crabs of the families Potamidae, Gecarcinucidae, and Sesarmidae in the archipelago of Anambas and Natuna Islands in Indonesia. Five genera (one new) and eight species (four new) are now recorded from the islands. For the Potamidae, a new genus and a new species, Natunamon indonesicumn. sp., is described from Natuna; the taxon has diagnostic characters intermediate between IsolapotamonBott, 1968 and IbanumNg, 1995 from Borneo. A new species of Isolapotamon, I. remotumn. sp., is also described from Anambas; this is the first record of the genus outside Borneo and Mindanao, Philippines. For the Gecarcinucidae, the rare Balssiathelphusa natunaensisBott, 1970 is collected for the first time since its description, although the type was collected over 120 years ago; the species is redescribed in detail and the composition of the genus discussed. The widely distributed gecarcinucid, Parathelphusa maculataDe Man, 1879 is also recorded from Anambas and Natuna. Four species of Sesarmidae are reported: Geosesarma insulare Ng, 1986 (from Anambas), G. teschi Ng, 1986 (from Natuna), G. anambasn. sp. (from Anambas) and G. hashimin. sp. (from Natuna). Geosesarma hashimin. sp. is an arboreal species with a suite of atypical characters that suggest its present classification in Geosesarma needs to be reassessed.","PeriodicalId":54850,"journal":{"name":"Journal of Crustacean Biology","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44106078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Trehalose is important in activity, development, and environmental-stress response, especially in invertebrates. It is mainly synthesized by trehalose-6-phosphate synthase (TPS) and trehalose-6-phosphate phosphatase (TPP), and degraded by trehalase (TRE). In the present study, the tps, tpp, and tre were identified from various crustacean species and their phylogeny, structure, network, and transcriptome were analyzed. The tps and tpp are fused in crustaceans, accompanied with multi-copies of genes to improve the synthesis capacity of trehalose, and they may be formed by whole-genome duplication (WGD) and/or segmental duplications. Phylogenetic subgroups of enzymes in the same species may be due to the different lengths and distribution positions of domains. The protein with single TPP domain in the salmon louse, the copepod Lepeophtheirus salmonis (Krøyer, 1837), probably has a depoisoning effect. Structure analyses and location predictions showed that crustacean TRE possess an α-helix-rich structure with barrel core, and are membrane-bound, cytoplasmic, and secreted. Additionally, the non-acid TRE might not be adjusted by Ca2+ because there is no binding domain in crustaceans. Expression profiles of different tissues, developmental periods, and environmental-challenge responses, as well as genes of co-expression networks suggested that TPS (including TPP) and TRE might play important roles in physiological activities including development and environmental adaptation in crustaceans. Multi-copies of tre may enhance survival ability of copepods in diverse and sometimes harsh environments. Branchiopods, copepods, and the marine shrimp Penaeus vannamei Boone, 1931 are suspected to adopt possible acid TRE as a supplementary strategy in response to stress.
{"title":"A survey of the genes encoding trehalose-metabolism enzymes in crustaceans","authors":"Yuting Huang, Q. Shi","doi":"10.1093/jcbiol/ruad008","DOIUrl":"https://doi.org/10.1093/jcbiol/ruad008","url":null,"abstract":"\u0000 Trehalose is important in activity, development, and environmental-stress response, especially in invertebrates. It is mainly synthesized by trehalose-6-phosphate synthase (TPS) and trehalose-6-phosphate phosphatase (TPP), and degraded by trehalase (TRE). In the present study, the tps, tpp, and tre were identified from various crustacean species and their phylogeny, structure, network, and transcriptome were analyzed. The tps and tpp are fused in crustaceans, accompanied with multi-copies of genes to improve the synthesis capacity of trehalose, and they may be formed by whole-genome duplication (WGD) and/or segmental duplications. Phylogenetic subgroups of enzymes in the same species may be due to the different lengths and distribution positions of domains. The protein with single TPP domain in the salmon louse, the copepod Lepeophtheirus salmonis (Krøyer, 1837), probably has a depoisoning effect. Structure analyses and location predictions showed that crustacean TRE possess an α-helix-rich structure with barrel core, and are membrane-bound, cytoplasmic, and secreted. Additionally, the non-acid TRE might not be adjusted by Ca2+ because there is no binding domain in crustaceans. Expression profiles of different tissues, developmental periods, and environmental-challenge responses, as well as genes of co-expression networks suggested that TPS (including TPP) and TRE might play important roles in physiological activities including development and environmental adaptation in crustaceans. Multi-copies of tre may enhance survival ability of copepods in diverse and sometimes harsh environments. Branchiopods, copepods, and the marine shrimp Penaeus vannamei Boone, 1931 are suspected to adopt possible acid TRE as a supplementary strategy in response to stress.","PeriodicalId":54850,"journal":{"name":"Journal of Crustacean Biology","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43254207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Extinction and origination of genera and families of marine Decapoda at the end of the Cretaceous established the modern fauna. Podotrematous crabs suffered high extinction levels, whereas heterotrematous crabs experienced both extinction and radiation. Anomuran decapods exhibited high extinction levels at the generic but not family level. In general, family extinctions predominantly occurred among podotrematous and heterotrematous crabs, which also exhibit overall shorter family ranges. Possible refugia promoted survival of genera and families into the Paleocene, whereas habitation of the Western Interior Seaway ensured high levels of extinction. Areas proximal to the Chicxulub impact site experienced moderate levels of extinction. Habitat specialists preferentially survived the end-Cretaceous extinction in some clades. Heterotrematous crabs recovered rapidly in the Paleocene, especially in the siliciclastic environments of the Americas. Because decapod crustaceans are highly variable in morphology, habitat, and ecology, no one pattern of extinction and recovery can explain the end-Cretaceous decapod extinction event. Rather, a mosaic of responses in various decapod groups led to their differential survival.
{"title":"Selective extinction at the end-Cretaceous and appearance of the modern Decapoda","authors":"C. Schweitzer, R. Feldmann","doi":"10.1093/jcbiol/ruad018","DOIUrl":"https://doi.org/10.1093/jcbiol/ruad018","url":null,"abstract":"\u0000 Extinction and origination of genera and families of marine Decapoda at the end of the Cretaceous established the modern fauna. Podotrematous crabs suffered high extinction levels, whereas heterotrematous crabs experienced both extinction and radiation. Anomuran decapods exhibited high extinction levels at the generic but not family level. In general, family extinctions predominantly occurred among podotrematous and heterotrematous crabs, which also exhibit overall shorter family ranges. Possible refugia promoted survival of genera and families into the Paleocene, whereas habitation of the Western Interior Seaway ensured high levels of extinction. Areas proximal to the Chicxulub impact site experienced moderate levels of extinction. Habitat specialists preferentially survived the end-Cretaceous extinction in some clades. Heterotrematous crabs recovered rapidly in the Paleocene, especially in the siliciclastic environments of the Americas. Because decapod crustaceans are highly variable in morphology, habitat, and ecology, no one pattern of extinction and recovery can explain the end-Cretaceous decapod extinction event. Rather, a mosaic of responses in various decapod groups led to their differential survival.","PeriodicalId":54850,"journal":{"name":"Journal of Crustacean Biology","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44853714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：