14 results on '"Fukushima, Caroline Sayuri"'
Search Results
2. Searching for the toxic potential of Loxosceles amazonica and Loxosceles willianilsoni spiders' venoms.
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Lopes, Priscila Hess, Fukushima, Caroline Sayuri, Shoji, Rosana, Bertani, Rogério, and Tambourgi, Denise V.
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SPIDER venom , *LOXOSCELES , *VENOM , *CELL death - Abstract
The Loxosceles genus belongs to the Sicariidae family and it comprises species whose venom can cause accidents with potentially fatal consequences. We have previously shown that SMase D is the enzyme responsible for the main pathological effects of Loxosceles venom. Despite the severity of accidents with Loxosceles , few species are considered to be of medical importance. Little is known about the venom of non-synanthropic species that live in natural environments. To contribute to a better understanding about the venom's toxicity of Loxosceles genus, the aim of this study was to (i) characterize the toxic properties of Loxosceles amazonica from two different localities and a recent described cave species Loxosceles willianilsoni and (ii) compare these venoms with that from Loxosceles laeta, which is among the most toxic ones. We show here that both L. amazonica venoms (from the two studied locations) and L. willianilsoni presented SMase D activity similar to that exhibited by L. laeta venom. Although L. amazonica and L. willianilsoni venoms were able to induce complement dependent human erythrocytes lysis, they were not able to induce cell death of human keratinocytes, as promoted by L. laeta venom, in the concentrations tested. These results indicate that other species of Loxosceles , in addition to those classified as medically important, have toxic potential to cause accidents in humans, despite interspecific variations that denote possible less toxicity. • Loxosceles spider venoms may cause accidents with potentially fatal consequences. • Despite the severity of accidents, few species are considered of medical importance. • Venom from the cave species , L. willianilsoni, induce complement dependent hemolysis. • L. willianilsoni and L. amazonica venoms do not induce keratinocyte death as L. laeta. • Loxosceles venoms present interspecific variations in their toxicity. [ABSTRACT FROM AUTHOR]
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- 2021
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3. Description of the male of the Critically Endangered tarantula Typhochlaena curumim Bertani, 2012 (Araneae, Theraphosidae), with comments on tarantula trade and conservation.
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Fukushima, Caroline Sayuri, Cardoso, Pedro, and Bertani, Rogério
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TARANTULAS , *INTERNATIONAL trade , *RAIN forests , *MALES , *PETS , *JUMPING spiders - Abstract
The genus Typhochlaena C.L. Koch, 1850 consists of five small size arboreal tarantula species with remarkable colored abdominal patterns and a very restricted geographic range in Brazil. Here, we describe the male of Typhochlaena curumim Bertani, 2012, which was collected in an area of Brazilian Atlantic Rainforest. The new record extends the northern limit of the geographic range for both the genus and species. As Typhochlaena spp. are now especially popular and requested in the pet market, and because T. curumim is classified as Critically Endangered, we discuss the impacts of the international trade and other challenges on conservation of the genus. [ABSTRACT FROM AUTHOR]
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- 2020
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4. Two new Brazilian species of Loxosceles Heinecken & Lowe, 1832 with remarks on amazonica and rufescens groups (Araneae, Sicariidae).
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Fukushima, Caroline Sayuri, Gonçalves de Andrade, Rute Maria, and Bertani, Rogério
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LOXOSCELES , *SPIDER ecology , *ARACHNIDA classification , *INVERTEBRATE phylogeny , *INVERTEBRATE morphology - Abstract
The genus Loxosceles Heinecken & Lowe, 1832 has 91 representatives in the New World. Despite medical relevancy, the taxonomy of the genus is poorly understood. South American Loxosceles were divided into four groups of species: laeta, spadicea, gaucho and amazonica; this last one has a single species, Loxosceles amazonica Gertsch, 1967. More recently, the natural occurrence of L. amazonica in the New World has been questioned, due to the strong morphological resemblance and close phylogenetic relationship with Old World species, mainly with Loxosceles rufescens (Dufour, 1820). Herein, L. amazonica is rediagnosed and its morphological variation and natural distribution discussed. Two new species closely related to it from northeastern Brazil are also described, Loxosceles willianilsoni sp. n., from the state of Rio Grande do Norte, and Loxosceles muriciensis sp. n., from the state of Alagoas. The relationships of these new species with L. amazonica and L. rufescens are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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5. Taxonomic revision and cladistic analysis of Avicularia Lamarck, 1818 (Araneae, Theraphosidae, Aviculariinae) with description of three new aviculariine genera.
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Fukushima, Caroline Sayuri and Bertani, Rogério
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TARANTULAS , *ANIMAL morphology , *CLADISTIC analysis - Abstract
The genus Avicularia Lamarck, 1818 is revised and all species are rediagnosed. The type species, described as Aranea avicularia Linnaeus, 1758, is the oldest mygalomorph species described and its taxonomic history is extensive and confusing. Cladistic analyses using both equal and implied weights were carried out with a matrix of 46 taxa from seven theraphosid subfamilies, and 71 morphological and ecological characters. The optimal cladogram found with Piwe and concavity = 6 suggests Avicularia and Aviculariinae are monophyletic. Subfamily Aviculariinae includes Avicularia Lamarck, 1818, Typhochlaena C. L. Koch, 1850, Tapinauchenius Ausserer, 1871, Stromatopelma Karsch, 1881, Ephebopus Simon, 1892, Psalmopoeus Pocock, 1895, Heteroscodra Pocock, 1899, Iridopelma Pocock, 1901, Pachistopelma Pocock, 1901, Ybyrapora gen. n., Caribena gen. n., and Antillena gen. n. The clade is supported by well-developed scopulae on tarsi and metatarsi, greatly extended laterally. Avicularia synapomorphies are juveniles bearing black tarsi contrasting with other lighter articles; spermathecae with an accentuated outwards curvature medially, and male palpal bulb with embolus medial portion and tegulum's margin form an acute angle in retrolateral view. Avicularia is composed of twelve species, including three new species: Avicularia avicularia (Linnaeus, 1818), Avicularia glauca Simon, 1891, Avicularia variegata (F. O. Pickard-Cambridge, 1896) stat. n., A. minatrix Pocock, 1903, Avicularia taunayi (Mello-Leitão, 1920), Avicularia juruensis Mello-Leitão, 1923, Avicularia rufa Schiapelli & Gerschman, 1945, Avicularia purpurea Kirk, 1990, A. hirschii Bullmer, Thierer-Lutz & Schmidt, 2006, Avicularia merianae sp. n., A. lynnae sp. n., and A. caei sp. n. Avicularia species are distributed throughout Mexico, Costa Rica, Panama, Trinidad and Tobago, Venezuela, Guyana, Suriname, French Guiana, Colombia, Ecuador, Peru, Bolivia, and Brazil. Three new genera are erected to accommodate former Avicularia species: Caribena gen. n., composed of Caribena laeta (C. L. Koch, 1842), comb. n. and Caribena versicolor (Walckenaer, 1837), comb. n.; Antillena gen. n., with a single species, Antillena rickwesti (Bertani & Huff, 2013), comb. n., both from the Caribbean; and Ybyrapora gen. n., composed of Ybyrapora sooretama (Bertani & Fukushima, 2009), comb. n., Ybyrapora gamba (Bertani & Fukushima, 2009), comb. n. and Ybyrapora diversipes (C. L. Koch, 1842), comb. n. from Brazilian rainforest. The subspecies Avicularia avicularia variegata F. O. Pickard-Cambridge, 1896 is elevated to species status, resulting in the combination Avicularia variegata (F. O. Pickard-Cambridge, 1896) stat. n. The following new synonymies are established: Avicularia velutina Simon 1889, Avicularia exilis Strand, 1907, Avicularia ancylochyra Mello-Leitão, 1923, Avicularia cuminami Mello-Leitão, 1930, and Avicularia nigrotaeniata Mello-Leitão, 1940 are junior synonyms of A. avicularia; Avicularia bicegoi Mello-Leitão, 1923 is a junior synonym of A. variegata stat. n., and Avicularia urticans Schmidt, 1994 is a junior synonym of Avicularia juruensis Mello-Leitão, 1923. Species transferred to other genera: Avicularia affinis (Nicolet, 1849) is transferred to Euathlus Ausserer, 1875, making the new combination Euathlus affinis (Nicolet, 1849), comb. n.; Avicularia subvulpina Strand, 1906 is transferred to Grammostola Simon, 1892, making the new combination Grammostola subvulpina (Strand, 1906), comb. n.; Avicularia aymara (Chamberlin, 1916) is transferred to Thrixopelma Schmidt, 1994, making the new combination Thrixopelma aymara (Chamberlin, 1916), comb. n.; Avicularia leporina (C. L. Koch, 1841) and Avicularia plantaris (C. L. Koch, 1842) are transferred to Iridopelma Pocock, 1901, making the new combinations Iridopelma leporina (C. L. Koch, 1841), comb. n. and Iridopelma plantaris (C. L. Koch, 1842), comb. n.; the two last species are considered nomina dubia. The following species are considered nomina dubia: Avicularia hirsutissima (C. L. Koch, 1842) nomen dubium; Ischnocolus hirsutum Ausserer, 1875 nomen dubium; Ischnocolus gracilis Keyserling, 1891 nomen dubium; Avicularia arabica (Strand, 1908) nomen dubium; Araneus hirtipes (Fabricius, 1787) nomen dubium; Avicularia ochracea (Perty, 1833) nomen dubium; Avicularia walckenaerii (Perty, 1833) nomen dubium; Avicularia testacea (C. L. Koch, 1841) nomen dubium; Avicularia detrita (C. L. Koch, 1842) nomen dubium; Ischnocolus doleschalli Ausserer, 1871 nomen dubium; Avicularia metallica Ausserer, 1875 nomen dubium; Avicularia rapax (Ausserer, 1875) nomen dubium; Avicularia holmbergi Thorell, 1890 nomen dubium; Avicularia aurantiaca Bauer, 1996 nomen dubium; Avicularia azuraklaasi Tesmoingt, 1996 nomen dubium; Avicularia huriana Tesmoingt, 1996 nomen dubium; Avicularia ulrichea Tesmoingt, 1996 nomen dubium; Avicularia braunshauseni Tesmoingt, 1999 nomen dubium; Avicularia geroldi Tesmoingt, 1999 nomen dubium; Avicularia soratae Strand, 1907 nomen dubium; Avicularia fasciculata Strand, 1907 nomen dubium; Avicularia fasciculata clara Strand, 1907 nomen dubium; and Avicularia surinamensis Strand, 1907 nomen dubium. Avicularia vestiaria (De Geer, 1778) is considered nomen nudum. Keys are provided for identification of all aviculariine genera, as well as to Avicularia, Caribena gen. n., Ybyrapora gen. n. and Antillena gen. n. species. Maps with records and information on species habitat are also presented. Lectotypes are newly designed for A. avicularia, A. variegata stat. n., A. juruensis, C. laeta comb. n., E. affinis comb. n. and a neotype is established for C. versicolor comb. n. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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6. On the Avicularia (Araneae: Theraphosidae: Aviculariinae) species from Uruguay.
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Fukushima, Caroline Sayuri, Pérez-Miles, Fernando, and Bertani, Rogério
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SPIDERS , *ANIMAL classification , *EURYPELMA , *TARANTULAS , *SPECIES distribution , *GENITALIA - Abstract
The taxonomic status of four species of Avicularia Lamarck 1818 described from Uruguay: Avicularia anthracina (C.L. Koch 1842), Avicularia alticeps (Keyserling 1878), Avicularia parva (Keyserling 1878) and Avicularia tigrina (Pocock 1903) is discussed. The holotypes and/or original descriptions of these species were examined, and two taxonomic synonymies are needed, which are presented herein. Avicularia anthracina is transferred to Grammostola, resulting in Grammostola anthracina (C.L. Koch 1842) new combination and is considered a senior synonym of Grammostola mollicoma Ausserer 1875 new synonymy. Likewise, Avicularia parva is transferred to Catumiri Guadanucci 2004, where it is placed in the synonymy of Catumiri uruguayense Guadanucci 2004 new synonymy. Avicularia tigrina and Avicularia alticeps, originally described in the genera Ischnocolus Ausserer 1875 and Pterinopelma Pocock 1901, respectively, are herein considered nomina dubia since their types are presumed lost. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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7. The identity of Mygale brunnipes C.L. Koch 1842 (Araneae, Theraphosidae), with a redescription of the species and the description of a new genus.
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Fukushima, Caroline Sayuri, Nagahama, Roberto Hiroaki, and Bertani, Rogério
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TARANTULAS , *SPIDERS , *ARACHNIDA , *ANIMAL species , *ANIMAL classification - Abstract
We describe Kochiana new genus to accommodate a small Brazilian theraphosine species described originally as Mygale brunnipes by Koch (1842), resulting in Kochiana brunnipes new combination. Recently, specimens were rediscovered in northeastern Brazilian Atlantic rainforest. A preliminary cladistic analysis using equal weights parsimony and implied weights, was carried out to examine its phylogenetic placement. Kochiana new genus was monophyletic in all trees regardless of weighting scheme or concavity used. There is preliminary evidence for Kochiana new genus monophyly and weak evidence for its placement as sister group of Plesiopelma. Kochiana new genus can be characterized by the presence of a hornshaped spermatheca in females and males with a palpal bulb having prolateral accessory keels and a well developed medial crest on the embolus apex. [ABSTRACT FROM AUTHOR]
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- 2008
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8. Mating behavior of Sickius longibulbi (Araneae, Theraphosidae, Ischnocolinae), a spider that lacks spermathecae.
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Bertani, Rogério, Fukushima, Caroline Sayuri, and da Silva Júnior, Pedro Ismael
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ANIMAL species , *ANIMAL classification , *THERAPSIDA , *INSECT anatomy , *REPRODUCTION , *FERTILIZATION (Biology) - Abstract
We describe the mating behavior in the spermatheca-lacking theraphosid species Sickius longibulbi Soares & Camargo 1948. The behavior in captivity of nine pairs of S. longibulbi was videotaped and analyzed. The mating of this species presented an uncommon theraphosid pattern. There is little in the way of overt courtship by the male, the primary behavior seen being the male's use of legs I and II to touch the female's first pairs of legs and her chelicerae. Sometimes the male clasped one of the female's first pairs of legs, bringing her dose to him. While the female raised her body, the male clasped her fangs and held her tightly with his legs Ill wrapped around her prosoma. The male seemed to try to knock the female down, pushing her entire body until she lay on her dorsum. In this phase we observed the male biting the female on the sternum or on the leg joints. When the female fell, the male attempted to position himself at an angle of 90° from the female. These movements appear to demand a lot of energy, particularly because the female is not passive during the mating. Our findings suggest that copulating in this position is, for the male, more successful than adopting other positions because it allows his extremely long palpal bulbs to deposit more sperm in the female oviduct where -- since she lacks spermathecae -- she retains the sperm. We suggest that the further he reaches into the oviduct, the greater the chance that he will fertilize the female's eggs. [ABSTRACT FROM AUTHOR]
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- 2008
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9. Sociable widow spiders? Evidence of subsociality in Latrodectus Walckenaer, 1805 (Araneae, Theridiidae).
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Bertani, Rogério, Fukushima, Caroline Sayuri, and Martins, Rosana
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ANIMAL social behavior , *WIDOW spiders , *ANIMAL behavior , *ANIMAL societies , *CANNIBALISM in animals - Abstract
A first case of subsociality is reported for the genus Latrodectus. Individuals were found sharing the same web and feeding together. In captivity they showed mutual tolerance and communal feeding. This finding is remarkable for two reasons. First, widow spiders, even compared with other spiders, are famously aggressive and cannibalistic so that social behavior in the genus was unexpected. Second, the genus nests outside the “ Anelosimus + lost colulus” clade where all the other social theridiids are found. [ABSTRACT FROM AUTHOR]
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- 2008
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10. Sphingomyelinase D Activity in Sicarius tropicus Venom: Toxic Potential and Clues to the Evolution of SMases D in the Sicariidae Family.
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Lopes, Priscila Hess, Fukushima, Caroline Sayuri, Shoji, Rosana, Bertani, Rogério, and Tambourgi, Denise V.
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SPHINGOMYELINASE , *VENOM , *LOXOSCELES , *TOXINS - Abstract
The spider family Sicariidae includes three genera, Hexophthalma, Sicarius and Loxosceles. The three genera share a common characteristic in their venoms: the presence of Sphingomyelinases D (SMase D). SMases D are considered the toxins that cause the main pathological effects of the Loxosceles venom, that is, those responsible for the development of loxoscelism. Some studies have shown that Sicarius spiders have less or undetectable SMase D activity in their venoms, when compared to Hexophthalma. In contrast, our group has shown that Sicarius ornatus, a Brazilian species, has active SMase D and toxic potential to envenomation. However, few species of Sicarius have been characterized for their toxic potential. In order to contribute to a better understanding about the toxicity of Sicarius venoms, the aim of this study was to characterize the toxic properties of male and female venoms from Sicarius tropicus and compare them with that from Loxosceles laeta, one of the most toxic Loxosceles venoms. We show here that S. tropicus venom presents active SMases D. However, regarding hemolysis development, it seems that these toxins in this species present different molecular mechanisms of action than that described for Loxosceles venoms, whereas it is similar to those present in bacteria containing SMase D. Besides, our results also suggest that, in addition to the interspecific differences, intraspecific variations in the venoms' composition may play a role in the toxic potential of venoms from Sicarius species. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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11. Global wildlife trade permeates the Tree of Life.
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Fukushima, Caroline Sayuri, Mammola, Stefano, and Cardoso, Pedro
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WILD animal trade , *INTERNATIONAL trade , *KNOWLEDGE gap theory , *GLOBAL analysis (Mathematics) , *TREES - Abstract
Legal and illegal wildlife trade is a multibillion dollar industry that is driving several species toward extinction. Even though wildlife trade permeates the Tree of Life, most analyses to date focused on the trade of a small selection of charismatic vertebrate species. Given that vertebrate taxa represent only 3% of described species, this is a significant bias that prevents the development of comprehensive conservation strategies. In this short contribution, we discuss the significance of global wildlife trade considering the full diversity of organisms for which data are available in the IUCN database. We emphasize the importance of being fast and effective in filling the knowledge gaps about non-vertebrate life forms, in order to achieve an in-depth understanding of global trading patterns across the full canopy of the Tree of Life, and not just its most appealing twig. • Global wildlife trade is a multibillion dollar industry that is driving several species toward extinction. • Most analyses on global wildlife trade are biased toward vertebrates. • Multiple datasets suggest that a huge fraction of illegal and legal traded wildlife is plant and invertebrates. • It is fundamental to fill this knowledge gap about global trade of non-vertebrate life forms. [ABSTRACT FROM AUTHOR]
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- 2020
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12. Towards establishment of a centralized spider traits database.
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Lowe, Elizabeth C., Wolff, Jonas O., Aceves-Aparicio, Alfonso, Birkhofer, Klaus, Branco, Vasco Veiga, Cardoso, Pedro, Chichorro, Filipe, Fukushima, Caroline Sayuri, Gonçalves-Souza, Thiago, Haddad, Charles R., Isaia, Marco, Krehenwinkel, Henrik, Audisio, Tracy Lynn, Macías-Hernández, Nuria, Malumbres-Olarte, Jagoba, Mammola, Stefano, McLean, Donald James, Michalko, Radek, Nentwig, Wolfgang, and Pekár, Stano
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SPIDERS , *ABIOTIC environment , *DATABASES , *POPULATION dynamics , *SPATIAL variation - Abstract
A main goal of ecological and evolutionary biology is understanding and predicting interactions between populations and both abiotic and biotic environments, the spatial and temporal variation of these interactions, and the effects on population dynamics and performance. Trait-based approaches can help to model these interactions and generate a comprehensive understanding of ecosystem functioning. A central tool is the collation of databases that include species trait information. Such centralized databases have been set up for a number of organismal groups but is lacking for one of the most important groups of predators in terrestrial ecosystems - spiders. Here we promote the collation of an open spider traits database, integrated into the global Open Traits Network. We explore the current collation of spider data and cover the logistics of setting up a global database, including which traits to include, the source of data, how to input data, database governance, geographic cover, accessibility, quality control and how to make the database sustainable long-term. Finally, we explore the scope of research questions that could be investigated using a global spider traits database. [ABSTRACT FROM AUTHOR]
- Published
- 2020
13. Towards establishment of a centralized spider traits database.
- Author
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Lowe, Elizabeth C., Wolff, Jonas O., Aceves-Aparicio, Alfonso, Birkhofer, Klaus, Branco, Vasco Veiga, Cardoso, Pedro, Chichorro, Filipe, Fukushima, Caroline Sayuri, Gonçalves-Souza, Thiago, Haddad, Charles R., Isaia, Marco, Krehenwinkel, Henrik, Audisio, Tracy Lynn, Macías-Hernández, Nuria, Malumbres-Olarte, Jagoba, Mammola, Stefano, McLean, Donald James, Michalko, Radek, Nentwig, Wolfgang, and Pekár, Stano
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ABIOTIC environment , *SPIDERS , *DATABASES , *POPULATION dynamics , *SPATIAL variation - Abstract
A main goal of ecological and evolutionary biology is understanding and predicting interactions between populations and both abiotic and biotic environments, the spatial and temporal variation of these interactions, and the effects on population dynamics and performance. Trait-based approaches can help to model these interactions and generate a comprehensive understanding of ecosystem functioning. A central tool is the collation of databases that include species trait information. Such centralized databases have been set up for a number of organismal groups but is lacking for one of the most important groups of predators in terrestrial ecosystems – spiders. Here we promote the collation of an open spider traits database, integrated into the global Open Traits Network. We explore the current collation of spider data and cover the logistics of setting up a global database, including which traits to include, the source of data, how to input data, database governance, geographic cover, accessibility, quality control and how to make the database sustainable long-term. Finally, we explore the scope of research questions that could be investigated using a global spider traits database. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
14. Spider conservation in Europe: a review.
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Milano, Filippo, Blick, Theo, Cardoso, Pedro, Chatzaki, Maria, Fukushima, Caroline Sayuri, Gajdoš, Peter, Gibbons, Alastair T., Henriques, Sergio, Macías-Hernández, Nuria, Mammola, Stefano, Nentwig, Wolfgang, Nolan, Myles, Pétillon, Julien, Polchaninova, Nina, Řezáč, Milan, Sandström, Jonas, Smith, Helen, Wiśniewski, Konrad, and Isaia, Marco
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SPIDERS , *NATURE conservation , *ONLINE databases , *ARACHNIDA , *LEGAL literature , *JUMPING spiders - Abstract
Despite their ecological importance and diversity, spiders (Arachnida: Araneae) are underrepresented in conservation policies in comparison to other groups. We review all extant conservation tools focusing on spiders in Europe, highlighting general patterns, limitations, gaps, and future directions. We assembled a comprehensive online database reporting all available information concerning the legal protection and conservation status of 4,154 spider species. Existing international legislation has limited coverage, with only one species listed in the Bern Convention and EU Habitats Directive. At the national and subnational levels, 178 species are formally mentioned in the legislation of 19 European countries. Moreover, the International Union for Conservation of Nature (IUCN) includes assessments for 301 species worldwide, 164 of these threatened and eight native to Europe. In addition, spiders are mentioned in Regional Red Lists and Red Books in 28 out of 42 European countries considered in this review. Northern and Central European countries have the highest percentage of species assessed at the regional level in Red Lists and Red Books. The Mediterranean basin has the highest spider diversities in Europe but conservation efforts are lacking, both in terms of assessments and national or subnational legislation. Among European species, Dolomedes plantarius , Argyroneta aquatica and Eresus kollari are the most frequently mentioned in European conservation measures, possibly due to their ecological traits and their strict association with declining habitats. Considering the current threats to spiders in Europe, the protection of large areas of suitable habitat should be considered as the most effective approach to spider conservation. • Spiders are largely underrepresented in conservation policies in Europe. • Only one spider species is listed in the Bern Convention and EU Habitats Directive. • 178 species of spiders are mentioned in the legislation of 19 European countries. • 28 European countries have spider Red Lists or Red Books. • Conservation efforts are lacking in Mediterranean countries. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
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