An alien ectosymbiotic branchiobdellidan (Annelida: Clitellata) adopting exotic crayfish: a biological co-invasion with unpredictable consequences

Invasive alien species present a global threat to biodiversity, particularly where pathogens and symbionts are involved. Branchiobdellidans are clitellate annelids with an obligate ectosymbiotic association primarily on astacoidean crayfish. There are several examples of branchiobdellidan species adopting a geographically exotic host where endemic and exotic crayfishes cohabit the same water body. The first records of a western North American branchiobdellidan, Xironogiton victoriensis, adopting the eastern North American crayfish, Procambarus clarkii, in 2 river basins in Spain provide further evidence of the ectosymbionts’ tolerance to adopt an exotic host. Given worldwide translocations of these and other commercial crayfish species, limnologists and agency managers need to be alert for further introductions of X. victoriensis and other branchiobdellidans. Impacts of these exotic ectosymbionts on habitat and biota at a new location are unknown, as are their consequences on native biodiversit

Revistas Veja e ?poca : um olhar complexo

Made available in DSpace on 2015-04-14T14:41:41Z (GMT). No. of bitstreams: 1 445031.pdf: 6702410 bytes, checksum: ac2480e83891faa9bb80316634cbeef6 (MD5) Previous issue date: 2012-12-10This study will seek to understand and explain the production of meaning in magazine journalism, from a complex view to weekly magazines, Veja and ?poca. To investigate the spinning of significations, we need the unraveling of the weave. To this end, we selected the categories, a priori, that will guide our gaze: Figures of Language, from Domingos Paschoal Cegalla, and Stereotype, Myth, Culture, Power and sociolect, from Roland Barthes. Through them, barthesian Semiology, as analysis technique, and Paradigm of Complexity morinean, as research method, we will quest for decoding of signs of our object. During the course of investigation, we will see, still, two categories emerge a posteriori, that will contribute to our vision and vidence of speech in magazines: Postmodernity, from Michel Maffesoli, and Self-Help, from Arnaldo Chagas. On this basis, theoretical and methodological, we will reflect by a transdisciplinary and dialogic way on the metamorphoses in making and narrating of the magazines, at contemporaneity. We will see that the interactions, complementary, competing and antagonistic, between reason and emotion, ethics and esthetics, wisdom and dementia, reveals a postmodern magazine journalism, with their own strategies for adherence and enchantmentEste estudo buscar? compreender e explicar a produ??o de sentido no Jornalismo de revista, a partir de um olhar complexo ?s semanais de informa??o, Veja e ?poca. Para investigarmos o tecer dos significados ser? preciso o desfazer da trama. Com este fim, selecionamos as categorias, a priori, que nortear?o o nosso olhar: Figuras de Linguagem, de Domingos Paschoal Cegalla, e Estere?tipo, Mito, Cultura, Poder e Socioleto, de Roland Barthes. Por meio delas, da Semiologia barthesiana, como t?cnica de an?lise, e do Paradigma da Complexidade moriniano, como m?todo de pesquisa, iremos ao encontro da decifra??o dos signos de nosso objeto. Durante a trajet?ria de investiga??o, veremos, ainda, surgirem duas categorias, a posteriori, que contribuir?o para a nossa vis?o e vid?ncia do discurso nos magazines: P?s- Modernidade, de Michel Maffesoli, e, Autoajuda, de Arnaldo Chagas. Com esta base, te?rica e metodol?gica, refletiremos de forma transdisciplinar e dial?gica sobre as metamorfoses no modo de fazer e de narrar dos magazines, na contemporaneidade. Veremos que as intera??es, complementares, concorrentes e antag?nicas, entre raz?o e emo??o, ?tica e est?tica, sabedoria e dem?ncia, revelam um Jornalismo de revista p?s-moderno, com estrat?gias pr?prias de ades?o e de encantamento

An alien ectosymbiotic branchiobdellidan (Annelida: Clitellata) adopting exotic crayfish: a biological co-invasion with unpredictable consequences

Invasive alien species present a global threat to biodiversity, particularly where pathogens and symbionts are involved. Branchiobdellidans are clitellate annelids with an obligate ectosymbiotic association primarily on astacoidean crayfish. There are several examples of branchiobdellidan species adopting a geographically exotic host where endemic and exotic crayfishes cohabit the same water body. The first records of a western North American branchiobdellidan, Xironogiton victoriensis, adopting the eastern North American crayfish, Procambarus clarkii, in 2 river basins in Spain provide further evidence of the ectosymbionts’ tolerance to adopt an exotic host. Given worldwide translocations of these and other commercial crayfish species, limnologists and agency managers need to be alert for further introductions of X. victoriensis and other branchiobdellidans. Impacts of these exotic ectosymbionts on habitat and biota at a new location are unknown, as are their consequences on native biodiversit