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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Taxonomia dos Metazo?rios Ectoparasitos do Caparari Pseudoplatystoma fasciatum (LINNAEUS, 1766) (Siluriformes, Pimelodidae) do alto rio Xingu, Estado do Par?, Brasil / Taxonomy of the Metazoan Ectoparasites of Caparari Pseudoplatystoma fasciatum (LINNAEUS, 1766) (Siluriformes, Pimelodidae) from high Xingu river, Par? State, North Brazil

Albuquerque, F?bio Edir Amaral 29 March 2012 (has links)
Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2017-07-06T11:45:05Z No. of bitstreams: 1 2012 - F?bio Edir Amaral Albuquerque.pdf: 3688203 bytes, checksum: deb77d79b3f829b640e9e7f0e18de1aa (MD5) / Made available in DSpace on 2017-07-06T11:45:06Z (GMT). No. of bitstreams: 1 2012 - F?bio Edir Amaral Albuquerque.pdf: 3688203 bytes, checksum: deb77d79b3f829b640e9e7f0e18de1aa (MD5) Previous issue date: 2012-03-29 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / A total of 25 specimens Caparari Pseudoplatystoma fasciatum were collected in four points of the high Xingu river sector, between April 2010 and July 2011. Two new locality records of Argulidae crustaceans are presented for Argulus pestifer and Dolops discoidalis. A new monogenetic specie was proposed, registered and studied in details. Demidospermus n. sp. differs from the other congenerics, because the anchors exhibit folds, variable forms, and deep roots not defined. Demidospermus sp. n. also exhibits a thickened ventral bar, straight or slightly curved anteriorly, with the extended Extremities, and with the Presence or Absence of an above-median keel. The dorsal bar is variable in form, straight and slender, with Presence or Absence of an above-median depression and tapered Extremities. The hooks are different in size and form, the first and second pairs have the tip and the shaft lightly curved, protuberant and truncated thumb, and the rod is dilated and tapered in proximal region. Hooks different in size and shape, 1-2 pairs: blade point and slightly curved or curved, thumb protruding, truncate, dilated or slender rod, tapered proximally, showing or not bulbs at the proximal end; the pairs 3-4-6-7: point slightly bent, curved or straight blade almost straight or moderately curved, thumb truncated or depressed, moderately dilated or slender rod, presented a bulb at the proximal end; The male copulatory organ (MCO) is variable in shape, with a convolute tube in the counterclockwise, and flaps that connect themselves on a sclerotized edge. Male copulatory organ (MCO), with variable shape, like a coiled tube, varying the number of rings in a counterclockwise direction, with tabs that connect to a margin esclerotizada or G-shaped, with a ring in order counterclockwise, showing a dilated base margin esclerotizada developed, from which protrudes a flap. The accessory piece, with variable shape, slightly concave or concave, the distal tapered, curved or slightly curved, serving as a guide to the MCO, the presence or absence of spines on the proximal end. The vagina has a bag-shaped vestibule connected or not to the vaginal channel through an annulated narrow. The study will can contribute to future research, in order to improve our knowledge about the parasite fauna of aquatic organisms in the Amazon region. / Um total de 25 esp?cimes de Caparari P. fasciatum foram coletados no alto rio Xingu, entre Abril de 2010 ? Julho de 2011. Foram apresentados dois novos registros de localidade de crust?ceos parasitos da fam?lia Argulidae, foram registrados, Argulus pestifer e Dolops discoidalis, e uma esp?cie de monogen?tico foi proposta como nova, examinada, registrada e comentada em detalhes. Demidospermus sp. n. difere dos seus cong?neres por apresentar ?ncoras em formas vari?veis, ra?zes profundas n?o definidas, apresentando uma dobra. Barra ventral em forma vari?vel, grossa, levemente curvada para a regi?o anterior, extremidades alargadas, com presen?a ou n?o de uma quilha na parte antero-medial. Barra dorsal, em forma vari?vel, reta e delgada, apresentando ou n?o uma depress?o antero-medial com extremidades afiladas. Ganchos diferentes em tamanho e forma, pares 1-2: ponta e l?mina levemente curva ou curvada, polegar protuberante, truncado, haste dilatada ou delgada, afilada proximalmente, apresentando ou n?o bulbos na extremidade proximal; pares 3-4-6-7: ponta levemente curvada, curva ou reta, l?mina quase retas ou moderadamente curvadas, polegar truncado ou deprimido, haste moderadamente dilatada ou delgada, apresentado um bulbo na extremidade proximal; par 5: ponta e l?mina retas, polegar achatado, haste alongada e fina, apresentando um bulbo na regi?o proximal. ?rg?o copulat?rio masculino (OCM), apresentando forma vari?vel, como um tubo enrolado, variando no n?mero de an?is no sentido anti-hor?rio, apresentando abas que se conectam a uma margem esclerotizada ou em forma de G ao contr?rio, com um anel em sentido anti-hor?rio, base dilatada apresentando uma margem esclerotizada desenvolvida, de onde se projeta um flap. Pe?a acess?ria, apresentando forma vari?vel, ligeiramente c?ncava ou c?ncava, parte distal afilada, curvada ou pouco curva, servindo de guia para o OCM, presen?a ou n?o de espinhos na extremidade proximal. Vagina apresentando um vest?bulo saculiforme, ligado ao canal vaginal atrav?s de um estreitamento anelado presente ou n?o. O presente estudo poder? colaborar com futuras pesquisas, com o prop?sito de melhorar o nosso conhecimento sobre a fauna dos organismos aqu?ticos da regi?o Amaz?nica

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