Abstract not available

The life history and ecology of Neochoroterpes mexicanus was studied from data collected September, 1971, to August, 1972, and January to December, 1973, in the Brazos River, Texas. Nymphal development, instar analysis, voltinism, standing crops, and production estimates were determined from the quantitative samples taken in 1971 and 1972. Aspects of the life history and food habits of 230 specimens were arrived at from qualitative samples and light box captures in 1973. Laboratory investigation in 1973 helped in establishing instar analysis, egg incubation and description, and first instar descriptions. Neochoroterpes mexicanus appeared to have three generations per year with brood overlap in the summer and fall. It displayed 16 and 19 instars for overwintering and combined summer generations respectively.

Submitted by Alberto Vieira (martins_vieira@ibest.com.br) on 2018-01-12T19:15:46Z No. of bitstreams: 1 552041.pdf: 13909587 bytes, checksum: 8dc00330d7bf2fa22dca20b2a4a92217 (MD5) / Made available in DSpace on 2018-01-12T19:15:46Z (GMT). No. of bitstreams: 1 552041.pdf: 13909587 bytes, checksum: 8dc00330d7bf2fa22dca20b2a4a92217 (MD5) Previous issue date: 2002-01-21 / Os Leptophlebiidae do Estado do Rio de Janeiro ainda são pobremente conhecidos tanto em tennos faunísticos quanto taxonômicos e biológicos. Até o momento, o estado tinha registrada a ocorrência de dez gêneros: Askola Peters, 1969, Farrodes Peters, 1971, Hagenulopsis Ulmer, 1920, Hermanella Needham & Murphy, 1924, 1966, Hylister Domínguez & Flowers, 1989, Massartella Lestage, 1930, Miroculis Edmunds Jr, 1963, Needhamella Domínguez & Flowers, 1989, Perissophlebiodes Savage, 1983 e Thraulodes Ulmer, 1920. A partir do estudo da efemeropterofauna de diversas localidades fluminenses, é apresentado um apanhado das ninfas de Leptophlebiidae aqui oconentes. Observações taxonômicas revelaram nove espécies novas da familia, sendo duas de Massartella (ambas de Nova Friburgo), uma de Hermanella (de Itatiaia), uma de Leentvaaria Demoulin, 1966 (de Comendador Levy Gasparian), una de Needhamella (de Comendador Levy Gasparian), uma de Thraulodes (de Itatiaia), uma de Traverella Edmunds Jr, 1948 (de Comendador Levy Gasparian), uma de Ulmeritoides Traver, 1959 (de Teresópolis) e uma de um gênero ainda não descrito (de Teresópolis). Além disso, são pela primeira vez descritas as ninfas de Farrodes carioca Domínguez, Molineri & Peters, 1996 (de Comendador Levy Gasparian, Itatiaia, Macaé, Mangaratiba, Nova Friburgo e Teresópolis), Thraulodes itatiajanus Traver & Edmunds Jr, 1967 (de Angra dos Reis, Itatiaia, Mangaratiba, Nova Friburgo, Parati e Teresópolis) e Massartella alegrettae Ulmer, 1943 (de Teresópolis). São redescritas as ninfas de Askola froehlichi Peters, 1969 (de Angra dos Reis, Itatiaia, Nova Friburgo e Teresópolis), Hylister plaumanni Domínguez & Flowers, 1989 (de Cachoeiras de Macacu, Nova Friburgo, Petrópolis e Teresópolis), Massartella brieni (Lestage, 1924) (de Angra dos Reis, Itatiaia, Mangaratiba, Nova Friburgo, Rio de Janeiro e Teresópolis) e Miroculis froehlichi Savage & Peters, 1983 (de Angra dos Reis, Cachoeiras de Macacu, Casimiro de Abreu, Comendador Levy Gasparian, Itatiaia, Macaé, Mangaratiba, Nova Friburgo, Rio de Janeiro e Teresópolis). Os gêneros Leentvaaria, Traverella e Ulmeritoides, além do gênero novo, são presentemente acrescidos à fauna fluminense. Assim, o Rio de Janeiro passa a ser o estado brasileiro com o maior número de gêneros de Leptophlebiidae registrados (quatorze). Em termos ecológicos, a maioria dos gêneros e espécies dessa família que aqui ocorrem está associada a ambientes lóticos ritrais, colonizando áreas de deposição de material orgânico alóctone. / The leptophlebiids from Rio de Janeiro State are still poorly known from fawlistic, taxonornic and biological points of view. Until this moment, ten genera of the family Leptophlebiidae were recorded in tbis State: Askola Peters, 1969, Farrodes Peters, 1971, Hagenulopsis Ulmer, 1920, Hermanella Needbam & Murphy, 1924, Hylister Domínguez & Flowers, 1989, Massartella Lestage, 1930, Miroculis Edmunds Jr, 1963, Needhamella Domínguez & Flowers, 1989, Perissophlebiodes Savage, 1983, and Thraulodes Ulmer, 1920. Herein is presented a survey of the nymphs of Leptophlebiidae from several places of Rio de Janeiro State. Taxonomic studies revealed the occurrence of nine new species, two of then in Massartella (bolh from Nova Friburgo), one in Hermanella (from Itatiaia), one in leentvaaria Demoulin, 1966 (from Comendador Levy Gasparian), one in Needhamella (from Comendador Levy Gasparian), one in Thraulodes (from Itatiaia), one in Traverella Edmunds Jr, 1948 (from Comendador Levy Gasparian), one in Ulmeritoides Traver, 1959 (from Teresópolis), and one in an undesctibed genus (from Teresópolis). Nymphs of Fãrrodes carioca Domínguez, Molineri & Peters, 1996 (from Comendador Levy Gasparian, Itatiaia, Macaé, Mangaratiba, Nova Friburgo, and Teresópolis), Thraulodes itatiajanus Traver & Echnunds Jr, 1967 (from Angra dos Reis, Itatiaia, Mangaratiba, Nova Friburgo, Parati, and Teresópolis), and Massartella alegrettae Uhner, 1943 (from Teresópolis) are described for the first time. Nymphs of Askola froehlichi Peters, 1969 (from Angra dos Reis, Itatiaia, Nova Friburgo, and Teresópolis), Hylister plaumanni Domínguez & Flowers, 1989 (from Cachoeiras de Macacu, Nova Friburgo, Petrópolis, and Teresópolis), Massartella brieni (Lestage, 1924) (from Angra dos Reis, Itatiaia, Mangaratiba, Nova Friburgo, Rio de Janeiro, and Teresópolis), and Miroculis froehlichi Savage & Peters, 1983 (from Angra dos Reis, Cachoeiras de Macacu, Casimiro de Abreu, Comendador Levy Gasparian, Itatiaia, Macaé, Mangaratiba, Nova Friburgo, Rio de Janeiro, and Teresópolis) are redescribed. Leentvaaria, Traverella, Ulmeritoides, and the new genus are for the first time recorded in Rio de Janeiro State. Rio de Janeiro becomes the Brazilian state with the major registered number of genera of Leptophlebiidae (fourteen genera). Most of the genera and species of this family are related to rithral habitats, occupying places with deposition of aloctone organic matter.

L'Ecrevisse à pattes blanches ou Austropotamobius pallipes est un des organismes sentinelles des rivières françaises dont le déclin accompagne la dégradation progressive des masses d'eau superficielle. Les programmes de repeuplement pour la conservation de l'espèce s'inscrivent dans le cadre de la restauration écologique et de la surveillance de la bonne qualité des milieux. Pour leur réussite, il est nécessaire de pouvoir évaluer le potentiel d'un site à être repeupler. En ce sens, le présent travail a proposé l'emploi des éphéméroptères et de la matière organique comme indicateurs. L'étude a été menée sur des ruisseaux de têtes de bassin des Deux-Sèvres qui constituent encore des sites à A. pallipes. La présence de certaines familles d'éphéméroptères (Leptophlebiidae) est corrélée avec la présence de cette écrevisse. Ces indicateurs biologiques ont prouvé leur efficacité dans le cadre de campagne de repeuplements réussis. Les propriétés de fluorescence de la matière organique expriment le fonctionnement des milieux et par extension leur qualité. Un modèle statistique bâti sur ces propriétés permet également de prédire la probabilité de présence ou d’absence d’A. pallipes pour un site donné. Les deux indicateurs proposés dans ce travail ont montré leur potentiel pour servir d'outil à la réintroduction de cette espèce. / White-clawed crayfish (Austopotamobius pallipes) is a sentinel organism in French rivers. Its decline follows the progressive degradation of the masses of water surfaces. Restocking programs for the conservation of this species take place in the frame of ecological restoring and monitoring of good environment quality. For their success, it is necessary to evaluate the potential of a site to be repopulated. In this sense, the present work proposes the use of Ephemeroptera (Leptophlebiidae) and Organic Matter as indicators. This study was conducted in headwater streams of the Deux-Sèvres region (France), which are suitable sites for A. pallipes. The presence of certain species of mayflies is correlated with the presence of this white-clawed crayfish. This biological indicator had proven its efficiency under a succeeded restocking campaign. The fluorescence properties of the Organic Matter express the functionning of the sites and by expansion their quality. A statistical model built on these properties also allows to predict the probability of a site for the presence or absence of A. pallipes. Two indicators proposed in this work have shown their potential toserve as a tool for the reintroduction of this species.