Pub Date : 2022-01-01DOI: 10.1590/2358-2936e2022035
Ercan Elmas, Onur Karadal
{"title":"Anesthetic and sedative effects of plant-derived essential oils on red swamp crayfish (Procambarus clarkii) at different concentrations and temperatures","authors":"Ercan Elmas, Onur Karadal","doi":"10.1590/2358-2936e2022035","DOIUrl":"https://doi.org/10.1590/2358-2936e2022035","url":null,"abstract":"","PeriodicalId":56265,"journal":{"name":"Nauplius","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67335292","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}
Pub Date : 2021-10-18DOI: 10.1590/2358-2936E2021041
V. Vicente, K. Mansur, Pedro A. S. Longo, Ana Laura Lorenço Olivino, F. Leite
Abstract The aim of this study is to investigate if Sargassum-associated herbivorous amphipods Cymadusa filosa Savigny, 1816 and Sunamphitoe pelagica (H. Milne Edwards, 1830) present differences in their population parameters at sites located at different distances from a state marina, which is the main source of pollution (especially heavy metals) in an impacted bay. The study was conducted at four beach sites within Flamengo Bay, Ubatuba municipality, northern coast of Sao Paulo State, Brazil. The beaches are Lamberto and Ribeira close to the pollution source and Flamengo and Santa Rita, which are more distant. We observed the predominance of juveniles in the populations of C. filosa and S. pelagica, followed by females, with the sex ratio for both species being favored toward females, and the highest densities of individuals were observed during the summer. Sunamphitoe pelagica presented lower density, smaller ovigerous females and egg volumes at Lamberto beach, indicating a possible higher sensitivity to metal pollution for this species. Cymadusa filosa showed no clear alteration of density, number of ovigerous females and egg volumes between sites. Our results emphasize the importance of studying the life history and reproductive parameters of herbivorous amphipods, showing how these parameters can be altered in contaminated areas.
{"title":"Variation in population and reproductive parameters of the amphipods, Cymadusa filosa Savigny, 1816 and Sunamphitoe pelagica (H. Milne Edwards, 1830), associated with Sargassum beds in an historically impacted bay","authors":"V. Vicente, K. Mansur, Pedro A. S. Longo, Ana Laura Lorenço Olivino, F. Leite","doi":"10.1590/2358-2936E2021041","DOIUrl":"https://doi.org/10.1590/2358-2936E2021041","url":null,"abstract":"Abstract The aim of this study is to investigate if Sargassum-associated herbivorous amphipods Cymadusa filosa Savigny, 1816 and Sunamphitoe pelagica (H. Milne Edwards, 1830) present differences in their population parameters at sites located at different distances from a state marina, which is the main source of pollution (especially heavy metals) in an impacted bay. The study was conducted at four beach sites within Flamengo Bay, Ubatuba municipality, northern coast of Sao Paulo State, Brazil. The beaches are Lamberto and Ribeira close to the pollution source and Flamengo and Santa Rita, which are more distant. We observed the predominance of juveniles in the populations of C. filosa and S. pelagica, followed by females, with the sex ratio for both species being favored toward females, and the highest densities of individuals were observed during the summer. Sunamphitoe pelagica presented lower density, smaller ovigerous females and egg volumes at Lamberto beach, indicating a possible higher sensitivity to metal pollution for this species. Cymadusa filosa showed no clear alteration of density, number of ovigerous females and egg volumes between sites. Our results emphasize the importance of studying the life history and reproductive parameters of herbivorous amphipods, showing how these parameters can be altered in contaminated areas.","PeriodicalId":56265,"journal":{"name":"Nauplius","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42761433","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}
Pub Date : 2021-09-24DOI: 10.1590/2358-2936e2021043
René Zambrano, J. Ramos
Abstract Alien species are organisms introduced into an area outside of their natural range and are considered a major cause of biodiversity loss in the marine environment. The aim of this work is to report on the alien crustacean species observed in Ecuador. A bibliographic review was conducted using a digital search in the scientific literature. A total of ten alien species of crustaceans, representing eight genera in seven families, were encountered in Ecuador. The only crab, Cardisoma crassum Smith, 1870, was observed in the Galapagos Islands. The other species include barnacles, crayfishes, and freshwater prawns. Native ranges of the alien crustaceans include the Indo-Pacific region, North America, Asia, and Australia. Major introduction pathways are aquaculture and transport by ship. Procambarus alleni (Faxon, 1884) was reported recently as an aquarium species, but its presence in the natural environmental is currently unknown. One alien species has been introduced each decade since the 1960s. Some species (the barnacles Amphibalanus improvisus (Darwin, 1854), Amphibalanus reticulatus (Utinomi, 1967), and the copepod Lernaea cyprinacea Linnaeus, 1758) were reported as alien species for Ecuador but need verification regarding their current status. Additionally, the barnacle Dosima fascicularis (Ellis and Solander, 1786) presented an occasional record in the Galapagos Islands, but due to its dispersal ability and open ocean habitat it is not possible to conclude that this really is an alien species. The list of alien crustacean species recorded in Ecuador is considered incomplete due to both scarce published work regarding this topic and taxonomic problems. Therefore, it is necessary to carry out more research to establish a complete list of the alien species present in Ecuador and assess their impact on aquatic ecosystems.
{"title":"Alien crustacean species recorded in Ecuador","authors":"René Zambrano, J. Ramos","doi":"10.1590/2358-2936e2021043","DOIUrl":"https://doi.org/10.1590/2358-2936e2021043","url":null,"abstract":"Abstract Alien species are organisms introduced into an area outside of their natural range and are considered a major cause of biodiversity loss in the marine environment. The aim of this work is to report on the alien crustacean species observed in Ecuador. A bibliographic review was conducted using a digital search in the scientific literature. A total of ten alien species of crustaceans, representing eight genera in seven families, were encountered in Ecuador. The only crab, Cardisoma crassum Smith, 1870, was observed in the Galapagos Islands. The other species include barnacles, crayfishes, and freshwater prawns. Native ranges of the alien crustaceans include the Indo-Pacific region, North America, Asia, and Australia. Major introduction pathways are aquaculture and transport by ship. Procambarus alleni (Faxon, 1884) was reported recently as an aquarium species, but its presence in the natural environmental is currently unknown. One alien species has been introduced each decade since the 1960s. Some species (the barnacles Amphibalanus improvisus (Darwin, 1854), Amphibalanus reticulatus (Utinomi, 1967), and the copepod Lernaea cyprinacea Linnaeus, 1758) were reported as alien species for Ecuador but need verification regarding their current status. Additionally, the barnacle Dosima fascicularis (Ellis and Solander, 1786) presented an occasional record in the Galapagos Islands, but due to its dispersal ability and open ocean habitat it is not possible to conclude that this really is an alien species. The list of alien crustacean species recorded in Ecuador is considered incomplete due to both scarce published work regarding this topic and taxonomic problems. Therefore, it is necessary to carry out more research to establish a complete list of the alien species present in Ecuador and assess their impact on aquatic ecosystems.","PeriodicalId":56265,"journal":{"name":"Nauplius","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48230410","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}
Pub Date : 2021-09-24DOI: 10.1590/2358-2936e2021042
Mithila Bhat, C. Rivonker, K. Patel, J. Trivedi
Abstract The present paper confirms the occurrence of the sesarmid crab Sarmatium crassum Dana, 1851 in India. The species has so far been recorded from Samoa, Tahiti, New Caledonia, eastern Australia, Philippines, Madagascar, South Africa, Tanzania, and Eritrea (Red Sea). This is the first record of the species from India.
摘要本文证实了印度芝麻蟹(Sarmatium crassum Dana, 1851)的存在。到目前为止，在萨摩亚、塔希提岛、新喀里多尼亚、东澳大利亚、菲律宾、马达加斯加、南非、坦桑尼亚和厄立特里亚(红海)都有记录。这是该物种在印度的首次记录。
{"title":"First confirmed record of Sarmatium crassum Dana, 1851 (Crustacea: Decapoda: Sesarmidae) from India","authors":"Mithila Bhat, C. Rivonker, K. Patel, J. Trivedi","doi":"10.1590/2358-2936e2021042","DOIUrl":"https://doi.org/10.1590/2358-2936e2021042","url":null,"abstract":"Abstract The present paper confirms the occurrence of the sesarmid crab Sarmatium crassum Dana, 1851 in India. The species has so far been recorded from Samoa, Tahiti, New Caledonia, eastern Australia, Philippines, Madagascar, South Africa, Tanzania, and Eritrea (Red Sea). This is the first record of the species from India.","PeriodicalId":56265,"journal":{"name":"Nauplius","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42517461","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}
Pub Date : 2021-09-06DOI: 10.1590/2358-2936e2021038
Íttalo Luã Silva Medeiros, Felipe Antonio dos Santos, R. Cordeiro, M. M. Melo Júnior
Abstract Temporary ponds are heterogeneous aquatic environments, in which hydrodynamics and richness of macrophytes may increase the diversity of zooplankton and other invertebrate communities. Cladocerans are common residents of these ecosystems, showing great variability of forms. During a faunistic survey in temporary ponds under the influence of riparian vegetation, in the Camucim Forest Protected Area, Pernambuco Endemism Center, Brazil, the cladocerans Moina dumonti Kotov, Elias-Gutierrez and Granado-Ramirez, 2005 and Chydorus nitidulus (Sars, 1901) were found. These are their first records in the Oriental Northeast Atlantic hydrographic region, and the second record of M. dumonti in Brazil. The present study raises Cladocera species richness in Pernambuco State to 73 and also 16 in the Pernambuco Endemism Center.
{"title":"New records of two cladoceran species (Branchiopoda: Anomopoda) from Northeastern Brazil: the importance of studies in temporary ponds","authors":"Íttalo Luã Silva Medeiros, Felipe Antonio dos Santos, R. Cordeiro, M. M. Melo Júnior","doi":"10.1590/2358-2936e2021038","DOIUrl":"https://doi.org/10.1590/2358-2936e2021038","url":null,"abstract":"Abstract Temporary ponds are heterogeneous aquatic environments, in which hydrodynamics and richness of macrophytes may increase the diversity of zooplankton and other invertebrate communities. Cladocerans are common residents of these ecosystems, showing great variability of forms. During a faunistic survey in temporary ponds under the influence of riparian vegetation, in the Camucim Forest Protected Area, Pernambuco Endemism Center, Brazil, the cladocerans Moina dumonti Kotov, Elias-Gutierrez and Granado-Ramirez, 2005 and Chydorus nitidulus (Sars, 1901) were found. These are their first records in the Oriental Northeast Atlantic hydrographic region, and the second record of M. dumonti in Brazil. The present study raises Cladocera species richness in Pernambuco State to 73 and also 16 in the Pernambuco Endemism Center.","PeriodicalId":56265,"journal":{"name":"Nauplius","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45630878","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}
Pub Date : 2021-09-06DOI: 10.1590/2358-2936e2021040
T. P. Macedo, T. Arai, H. Pinheiro, A. Freire
Abstract The Sally lightfoot crab, Grapsus grapsus (Linnaeus, 1758), is distributed along the Eastern Pacific coast and along the Western Atlantic coast, from the Gulf of Mexico to the Southwestern Atlantic. In Brazil, the only established populations are found on the Brazilian oceanic islands, although two previous records (1901 and 1966) reported the presence of individuals on the continental coast. Here, we report new records of the Sally lightfoot crab on the coast of the states of Espirito Santo and Rio Grande do Norte, southeastern and northeastern Brazil, respectively. We also discuss three main hypotheses that could explain occasional records (1901, 1966, 2005, and 2020) of single individuals on the mainland: rafting events associated with flotsam and debris carried by oceanic currents; hitchhiking on vessels and fishing boats navigating routes from the Brazilian oceanic islands to the mainland; and stochastic settlement through larval dispersal.
{"title":"On a trip to the mainland: occasional records of the rocky crab Grapsus grapsus (Linnaeus, 1758) (Decapoda: Grapsidae) on the Brazilian coast","authors":"T. P. Macedo, T. Arai, H. Pinheiro, A. Freire","doi":"10.1590/2358-2936e2021040","DOIUrl":"https://doi.org/10.1590/2358-2936e2021040","url":null,"abstract":"Abstract The Sally lightfoot crab, Grapsus grapsus (Linnaeus, 1758), is distributed along the Eastern Pacific coast and along the Western Atlantic coast, from the Gulf of Mexico to the Southwestern Atlantic. In Brazil, the only established populations are found on the Brazilian oceanic islands, although two previous records (1901 and 1966) reported the presence of individuals on the continental coast. Here, we report new records of the Sally lightfoot crab on the coast of the states of Espirito Santo and Rio Grande do Norte, southeastern and northeastern Brazil, respectively. We also discuss three main hypotheses that could explain occasional records (1901, 1966, 2005, and 2020) of single individuals on the mainland: rafting events associated with flotsam and debris carried by oceanic currents; hitchhiking on vessels and fishing boats navigating routes from the Brazilian oceanic islands to the mainland; and stochastic settlement through larval dispersal.","PeriodicalId":56265,"journal":{"name":"Nauplius","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43173888","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}
Pub Date : 2021-08-13DOI: 10.1590/2358-2936E2021035
H. Boos, Gilson Stanski, P. Araujo, G. Bond-Buckup
Abstract This study deals with population structure and habitat sharing of two sympatric aeglid species, Aegla jarai Bond-Buckup and Buckup, 1994 and Aegla muelleri Bond-Buckup and Buckup, 2010 at Espingarda Creek, Serra do Itajai National Park, Rio Itajai-Acu basin, Santa Catarina, Brazil. Individuals of A. jarai (n = 190) and A. muelleri (n = 131) were captured from June/2001 to May/2002 in monthly collection. A total of 89 males and 101 females (2 ovigerous) of A. jarai were collected with a sex ratio of 1:1, and 56 males and 75 females (2 ovigerous) of A. muelleri, with a predominance of females. Aegla jarai was larger than A. muelleri and the reproductive period of A. jarai was in the winter and spring, while that of A. muelleri was in the spring. Three cohorts were observed throughout the year, and both species have a recruiting period in the spring and summer. Both species perform their entire life cycle in the Espingarda Creek and their coexistence is attributed to space partitioning: the larger A. jarai lives in the large spaces formed between boulders, while the smaller A. muelleri shelters in the small spaces between pebbles.
摘要本研究涉及巴西圣卡塔琳娜Rio Itajai Acu盆地Serra do Itajai国家公园Espingarda Creek的两个同域aeglid物种，1994年的Aegla jarai Bond Buckup和Buckup，以及2010年的Aegra muelleri Bond Buckup和Buckup的种群结构和栖息地共享。在2001年6月至2002年5月的月度采集中，捕获了A.jarai（n=190）和A.muelleri（n=131）的个体。共采集到89只雄性和101只雌性（2只产卵）的A.jarai，性别比为1:1，以及56只雄性和75只雌性（两只产卵），以雌性为主。Aegla jarai比A.muelleri大，A.jarai的繁殖期在冬季和春季，而A.muellei的繁殖期则在春季。全年观察到三个群落，这两个物种在春季和夏季都有一个招募期。这两个物种的整个生命周期都在Espingarda溪中进行，它们的共存归因于空间划分：较大的A.jarai生活在巨石之间形成的大空间中，而较小的A.muelleri则栖息在鹅卵石之间的小空间中。
{"title":"Population structure and habitat occupation in two sympatric Aegla species (Decapoda, Anomura, Aeglidae) in Atlantic Forest, Brazil","authors":"H. Boos, Gilson Stanski, P. Araujo, G. Bond-Buckup","doi":"10.1590/2358-2936E2021035","DOIUrl":"https://doi.org/10.1590/2358-2936E2021035","url":null,"abstract":"Abstract This study deals with population structure and habitat sharing of two sympatric aeglid species, Aegla jarai Bond-Buckup and Buckup, 1994 and Aegla muelleri Bond-Buckup and Buckup, 2010 at Espingarda Creek, Serra do Itajai National Park, Rio Itajai-Acu basin, Santa Catarina, Brazil. Individuals of A. jarai (n = 190) and A. muelleri (n = 131) were captured from June/2001 to May/2002 in monthly collection. A total of 89 males and 101 females (2 ovigerous) of A. jarai were collected with a sex ratio of 1:1, and 56 males and 75 females (2 ovigerous) of A. muelleri, with a predominance of females. Aegla jarai was larger than A. muelleri and the reproductive period of A. jarai was in the winter and spring, while that of A. muelleri was in the spring. Three cohorts were observed throughout the year, and both species have a recruiting period in the spring and summer. Both species perform their entire life cycle in the Espingarda Creek and their coexistence is attributed to space partitioning: the larger A. jarai lives in the large spaces formed between boulders, while the smaller A. muelleri shelters in the small spaces between pebbles.","PeriodicalId":56265,"journal":{"name":"Nauplius","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48930836","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}
Pub Date : 2021-08-02DOI: 10.1590/2358-2936e2021033
R. S. Macêdo, C. A. Martins, Whandenson Machado Nascimento, A. Pinheiro
Abstract The freshwater prawn Macrobrachium jelskii (Miers, 1877) is a species with wide geographical distribution. However, the biological and ecological aspects of this species are poorly studied. Thus, the present study was carried out in Batateiras River, at the municipality of Juazeiro do Norte, located in the south of Ceara, in the semiarid region of northeastern Brazil. Samples were carried out monthly between January and December 2013, along the river margins. A total of 628 M. jelskii specimens were collected, 347 males and 281 females. The overall sex ratio was 1:0.81 (M:F). In relation to the carapace length, males reached sexual maturity at 5.1 mm while females reached morphological sexual maturity at 7.1 mm. Females were morphometrically larger than males, with means of 7.04 mm (± 1.61) and 5.97 mm (± 0.78), respectively. The ovigerous females were more frequent in the rainy season. Female fecundity showed a positive correlation with growth. Thus, our results report previously unknown information about M. jelskii for a semiarid region of northeastern Brazil.
{"title":"Population structure and fecundity of Macrobrachium jelskii (Miers, 1877) (Decapoda, Palaemonidae) on the Batateiras River, sub-basin of the Salgado River, in southern Ceará, Brazil","authors":"R. S. Macêdo, C. A. Martins, Whandenson Machado Nascimento, A. Pinheiro","doi":"10.1590/2358-2936e2021033","DOIUrl":"https://doi.org/10.1590/2358-2936e2021033","url":null,"abstract":"Abstract The freshwater prawn Macrobrachium jelskii (Miers, 1877) is a species with wide geographical distribution. However, the biological and ecological aspects of this species are poorly studied. Thus, the present study was carried out in Batateiras River, at the municipality of Juazeiro do Norte, located in the south of Ceara, in the semiarid region of northeastern Brazil. Samples were carried out monthly between January and December 2013, along the river margins. A total of 628 M. jelskii specimens were collected, 347 males and 281 females. The overall sex ratio was 1:0.81 (M:F). In relation to the carapace length, males reached sexual maturity at 5.1 mm while females reached morphological sexual maturity at 7.1 mm. Females were morphometrically larger than males, with means of 7.04 mm (± 1.61) and 5.97 mm (± 0.78), respectively. The ovigerous females were more frequent in the rainy season. Female fecundity showed a positive correlation with growth. Thus, our results report previously unknown information about M. jelskii for a semiarid region of northeastern Brazil.","PeriodicalId":56265,"journal":{"name":"Nauplius","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47228430","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}
Pub Date : 2021-07-21DOI: 10.1590/2358-2936e2021032
R. C. Santos, D. Alves, Abner Carvalho-Batista
Abstract The objective of this study is to report the first occurrences of three species from the genus Lysmata Risso, 1816 in an area of the Queimada Grande Island (QGI), a conservation unit on the southern coast of Sao Paulo, southeastern Brazil. The specimens were sampled manually in August 2018 from a small rocky formation from the QGI region. The species Lysmata bahia Rhyne and Lin, 2006, Lysmata uncicornis Holthuis and Maruin, 1952, and Lysmata vittata (Stimpson, 1860) are reported, of which the last two are not native to the Western Atlantic waters. The present study reports L. uncicornis for the first time on the coast of Sao Paulo State. The records informed herein not only provide more information about biodiversity, but can also help in the development of management plans and conservation.
{"title":"Shrimps of genus Lysmata Risso, 1816 (Caridea: Lysmatidae) from Queimada Grande Island region, southeastern Brazil","authors":"R. C. Santos, D. Alves, Abner Carvalho-Batista","doi":"10.1590/2358-2936e2021032","DOIUrl":"https://doi.org/10.1590/2358-2936e2021032","url":null,"abstract":"Abstract The objective of this study is to report the first occurrences of three species from the genus Lysmata Risso, 1816 in an area of the Queimada Grande Island (QGI), a conservation unit on the southern coast of Sao Paulo, southeastern Brazil. The specimens were sampled manually in August 2018 from a small rocky formation from the QGI region. The species Lysmata bahia Rhyne and Lin, 2006, Lysmata uncicornis Holthuis and Maruin, 1952, and Lysmata vittata (Stimpson, 1860) are reported, of which the last two are not native to the Western Atlantic waters. The present study reports L. uncicornis for the first time on the coast of Sao Paulo State. The records informed herein not only provide more information about biodiversity, but can also help in the development of management plans and conservation.","PeriodicalId":56265,"journal":{"name":"Nauplius","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45697799","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}
Pub Date : 2021-07-21DOI: 10.1590/2358-2936e2021031
Ivan Cañete, A. Friedlander, E. Sala, Tania Figueroa
Abstract Subtidal observations along the Cape Horn Archipelago, Chile (CHA) in February 2017 revealed an unusually large aggregation (or pod) of juvenile false king crabs, Paralomis granulosa (Hombron and Jacquinot, 1846), in association with kelp forests (Macrocystis pyrifera and Lessonia spp.). This is the first study to report a dense aggregation of juveniles of this crab, which was observed at Wollaston Island (WI) (~ 10 m). Paralomis granulosa was present on half the transects at WI (N=10), with a density of 3.1 ± 9.9 ind. m-2. Photographs from the podding event showed densities of P. granulosa ranging from 63 to 367 ind. plant-1 (190 ± 133 ind. plant-1). Juveniles (32.8 ± 7.3 mm carapace length) were recorded on kelp fronds, holdfasts, kelp stipes, and adjacent rocky bottom of this protected coast. This podding behavior resembles that of other juvenile king crabs in terms of homogeneity in size structure and may be a predator avoidance mechanism. These observations highlight three aspects of this kelp-animal relationship: (i) identification of a previously unknown ecosystem service provided by sub-Antarctic kelp forests to the associated benthic fauna; (ii) the ecological value of kelp as a bioengineering species; and (iii) pods being an important attribute for population assessments. Due to the importance of the CHA in the life cycle for this and other species, we suggest the archipelago be incorporated within the recently established Diego Ramirez Island-Drake Passage Marine Park.
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