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Search Results: 1 - 10 of 248154 matches for " Juan C.; Schnack "
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Calliphoridae (Diptera) from Southeastern Argentinean Patagonia: Species Composition and Abundance
Schnack,Juan A.; Mariluis,Juan C.;
Revista de la Sociedad Entomol?3gica Argentina , 2004,
Abstract: species composition and spatial and temporal numerical trends of blow flies (diptera, calliphoridae) species from three southeastern patagonia localities: río grande (53° 48' s, 67° 36' w) (province of tierra del fuego), río gallegos (51° 34' s, 69° 14' w) and puerto santa cruz (50° 04' s, 68° 27' w) (province de santa cruz) were studied during november, december (1997), and january and february (1998). results showed remarkable differences of overall fly abundance and species relative importance at every sampling site; nevertheless, they shared a poor species representation (s £ 6). the cosmopolitan calliphora vicina robineau-desvoidy, the nearly worldwide lucilia sericata (meigen), and the native compsomyiops fulvicrura (robineau-desvoidy) prevailed over the remaining species. records of protophormia terraenovae (robineau-desvoidy), a species indigenous to the northern hemisphere are noteworthy.
Calliphoridae (Diptera) from Southeastern Argentinean Patagonia: Species Composition and Abundance Calliphoridae (Diptera) del Sudeste de la Patagonia Argentina: Composición Específica y Abundancia
Juan A. Schnack,Juan C. Mariluis
Revista de la Sociedad Entomol?3gica Argentina , 2004,
Abstract: Species composition and spatial and temporal numerical trends of blow flies (Diptera, Calliphoridae) species from three southeastern Patagonia localities: Río Grande (53° 48' S, 67° 36' W) (province of Tierra del Fuego), Río Gallegos (51° 34' S, 69° 14' W) and Puerto Santa Cruz (50° 04' S, 68° 27' W) (province de Santa Cruz) were studied during November, December (1997), and January and February (1998). Results showed remarkable differences of overall fly abundance and species relative importance at every sampling site; nevertheless, they shared a poor species representation (S £ 6). The cosmopolitan Calliphora vicina Robineau-Desvoidy, the nearly worldwide Lucilia sericata (Meigen), and the native Compsomyiops fulvicrura (Robineau-Desvoidy) prevailed over the remaining species. Records of Protophormia terraenovae (Robineau-Desvoidy), a species indigenous to the Northern Hemisphere are noteworthy. Se estudian la composición y las variaciones numéricas espacio-temporales de especies de Calliphoridae (Diptera) de tres localidades del sudeste patagónico: Río Grande (53° 48' S, 67° 36' W) (provincia de Tierra del Fuego), Río Gallegos (51° 34' S, 69° 14' W) y Puerto Santa Cruz (50° 04' S, 68° 27' W) (provincia de Santa Cruz), a partir de muestreos realizados en noviembre, diciembre (1997), enero y febrero (1998). Comparando los sitios de muestreo, los resultados obtenidos muestran diferencias marcadas en la abundancia total de la taxocenosis como de cada una de sus especies, destacándose la escasa riqueza específica de cada uno de ellos (S £ 6). Calliphora vicina Robineau-Desvoidy (cosmopolita), Lucilia sericata (Meigen) (de amplia distribución mundial) y Compsomyiops fulvicrura (Robineau-Desvoidy) (nativa), son las mejor representadas numéricamente. Se subraya el hallazgo, en el área de estudio, de Protophormia terraenovae (Robineau-Desvoidy), especie indígena del hemisferio norte.
Flesh flies species (Diptera: Sarcophagidae) from a grassland and a woodland in a Nature Reserve of Buenos Aires, Argentina
Mulieri,Pablo R; Schnack,Juan A; Mariluis,Juan C; Torretta,Juan P;
Revista de Biología Tropical , 2008,
Abstract: temporal changes of flesh flies abundance were simultaneously recorded at monthly intervals during a year in a woodland and in a grassland at the "reserva ecológica costanera sur" (recs), buenos aires city, argentina. samples were taken at monthly intervals (february 2004-january 2005). hourly captures of adult flies (10:00 am - 04:00 pm) were taken each sampling date with a hand net. temperature was recorded at each hourly capture. the baits used were 200 g of rotten cow liver and 200 g of fresh dog faeces. records of abundance included only species whose abundance was ≥30 individuals accumulated during the whole sampling period. considering overall abundance, a non-parametric chi-square test was used to estimate deviations of an expected habitat and bait preference ratios of 1:1. the same criterion was applied to include species in a contingency table to describe their seasonality. the final matrix included four species whose associations to seasons were analyzed by using a correspondence analysis. to normalize the data, a log 10(n+1) transformation was applied prior to the analysis of correlation. pearson product-moment correlations were used to examine the relationship between flesh-fly abundance with temperature and habitat preference. the entire sample accumulated 1 305 individuals and 18 species. the flies were more abundant in the grassland than in the woodland. microcerella muehni, oxysarcodexia paulistanensis, o. varia and tricharaea (sarcophagula) occidua exhibited the higher relative abundance, representing the remaining species less than 8 % of the entire sample. most of the recorded species showed preference for faces as bait. concerning the dominant species, all of them but m. muehni, a suggestively termophobic species, prevailed in late spring-summer. the observed species arrangement at both sites indicates low species diversity and equitability and high information per individual in the average. the referred community traits would indicate the possi
Flesh flies species (Diptera: Sarcophagidae) from a grassland and a woodland in a Nature Reserve of Buenos Aires, Argentina
Pablo R Mulieri,Juan A Schnack,Juan C Mariluis,Juan P Torretta
Revista de Biología Tropical , 2008,
Abstract: Temporal changes of flesh flies abundance were simultaneously recorded at monthly intervals during a year in a woodland and in a grassland at the "Reserva Ecológica Costanera Sur" (RECS), Buenos Aires city, Argentina. Samples were taken at monthly intervals (February 2004-January 2005). Hourly captures of adult flies (10:00 am - 04:00 pm) were taken each sampling date with a hand net. Temperature was recorded at each hourly capture. The baits used were 200 g of rotten cow liver and 200 g of fresh dog faeces. Records of abundance included only species whose abundance was ≥30 individuals accumulated during the whole sampling period. Considering overall abundance, a non-parametric Chi-square test was used to estimate deviations of an expected habitat and bait preference ratios of 1:1. The same criterion was applied to include species in a contingency table to describe their seasonality. The final matrix included four species whose associations to seasons were analyzed by using a Correspondence Analysis. To normalize the data, a log 10(n+1) transformation was applied prior to the analysis of correlation. Pearson product-moment correlations were used to examine the relationship between flesh-fly abundance with temperature and habitat preference. The entire sample accumulated 1 305 individuals and 18 species. The flies were more abundant in the grassland than in the woodland. Microcerella muehni, Oxysarcodexia paulistanensis, O. varia and Tricharaea (Sarcophagula) occidua exhibited the higher relative abundance, representing the remaining species less than 8 % of the entire sample. Most of the recorded species showed preference for faces as bait. Concerning the dominant species, all of them but M. muehni, a suggestively termophobic species, prevailed in late spring-summer. The observed species arrangement at both sites indicates low species diversity and equitability and high information per individual in the average. The referred community traits would indicate the possible effects of environmental disturbance due to the proximity of study sites to dense urban settlements. Rev. Biol. Trop. 56 (3): 1287-1294. Epub 2008 September 30. Variaciones numéricas de especies de Sarcophagidae (Diptera) se registraron durante un a o a intervalos mensuales (febrero 2004-enero 2005), en un pastizal y un bosque de la "Reserva Ecológica Costanera Sur" (RECS) de la ciudad de Buenos Aires. Se realizaron capturas horarias (10:00 am - 04:00 pm) en cada fecha de muestreo. La muestra de todo el a o acumuló 1 305 individuos y 18 especies. Estos dípteros fueron más abundantes en el
The population ecology of Muscina stabulans (Fallén) (Diptera: Muscidae), along an Urban-Rural Gradient of Buenos Aires, Argentina
Patitucci, Luciano D;Mulieri, Pablo R;Mariluis, Juan C;Schnack, Juan A;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000300020
Abstract: the false stable fly, muscina stabulans (fallén), was surveyed along an urban-rural gradient at almirante brown, buenos aires province, argentina. samples were taken at monthly intervals from may 2005 to april 2007. hourly captures of adult flies (10:00 am - 04:00 pm) were taken at each sampling date with a hand net. the baits used were 250 g of rotten cow liver and 250 g of fresh dog faeces exposed in shaded and sunny areas. the entire sample accumulated 358 specimens. the number of specimens captured during the second year was higher than in the fi rst year. muscina stabulans was more abundant at urban-suburban sites. females showed significant preferences for cow liver. we caught more specimens in shaded areas. the hourly activity increased toward the afternoon at the three sites. the present work was the first ecological study related to a muscid species in argentina.
Calliphoridae (Diptera) from wild, suburban, and urban sites at three Southeast Patagonian localities: Calliphoridae (Diptera) de ambientes no habitados, suburbanos y urbanos en tres localidades del sudeste patagónico
Mariluis,Juan C.; Schnack,Juan A.; Mulieri,Pablo P.; Patitucci,Luciano D.;
Revista de la Sociedad Entomol?3gica Argentina , 2008,
Abstract: species composition, relative abundance, sex ratio and habitat preference of blowflies (diptera: calliphoridae) from caleta olivia, puerto deseado, and puerto san julián (santa cruz province, argentina) were studied during late spring and summer in 2004-2005. results showed a higher prevalence of the exotic species, calliphora vicina (robineau-desvoidy) and phaenicia sericata (meigen) at urban sites over the natives, compsomyops fulvicrura (robineau-desvoidy) and sarconesia chlorogaster (wiedemann), which shows a strong preference for those sampling sites either not inhabited or less influenced by human activities. sex ratio was female biased for all species, except for sarconesia chlorogaster, which exhibited a male prevalence over females.
Estudio preliminar de Calyptratae (Diptera) en la Reserva Natural Estricta Otamendi, Buenos Aires, Argentina
Patitucci,Luciano D.; Mulieri,Pablo R.; Domínguez,M. Cecilia; Mariluis,Juan C.; Schnack,Juan A.;
Revista de la Sociedad Entomol?3gica Argentina , 2011,
Abstract: a list of species of calyptratae is firstly disclosed in this work for otamendi reserve. this protected area contains a large area housing native species of grasses and woods. we recorded seven families of calyptratae (anthomyiidae, calliphoridae, fanniidae, muscidae, rhinophoridae, sarcophagidae and tachinidae) which include 56 species and 33 genera. anthomyia aurifacies (albuquerque) (anthomyiidae), myospila fluminensis couri & lopes (muscidae) and the genus thomazomyia (sarcophagidae) are new records for argentina. four species of fanniidae, 4 species of muscidae and 3 species of sarcophagidae are reported from buenos aires province for the first time. the richness was higher in the forest (44 species) and sarcophagidae (20 species) and muscidae (12 species) exhibited higher species richness than the remaining families. we registered 20% new taxa for the province.
Calliphoridae (Diptera) from wild, suburban, and urban sites at three Southeast Patagonian localities: Calliphoridae (Diptera) de ambientes no habitados, suburbanos y urbanos en tres localidades del sudeste patagónico
Juan C. Mariluis,Juan A. Schnack,Pablo P. Mulieri,Luciano D. Patitucci
Revista de la Sociedad Entomol?3gica Argentina , 2008,
Abstract: Species composition, relative abundance, sex ratio and habitat preference of blowflies (Diptera: Calliphoridae) from Caleta Olivia, Puerto Deseado, and Puerto San Julián (Santa Cruz Province, Argentina) were studied during late spring and summer in 2004-2005. Results showed a higher prevalence of the exotic species, Calliphora vicina (Robineau-Desvoidy) and Phaenicia sericata (Meigen) at urban sites over the natives, Compsomyops fulvicrura (Robineau-Desvoidy) and Sarconesia chlorogaster (Wiedemann), which shows a strong preference for those sampling sites either not inhabited or less influenced by human activities. Sex ratio was female biased for all species, except for Sarconesia chlorogaster, which exhibited a male prevalence over females. Durante fines de la primavera-verano de 2004-2005, se analizó la composición, abundancia relativa y proporción de sexos de especies de Calliphoridae (Diptera) en las localidades de Caleta Olivia, Puerto Deseado y Puerto San Julián (Provincia de Santa Cruz, Argentina). Tres sitios de muestreo afectados diferencialmente por la intervención humana fueron seleccionados en cada localidad. En las áreas urbanas, las especies exóticas Calliphora vicina (Robineau-Desvoidy) y Phaenicia sericata (Meigen) fueron dominantes. Por el contrario, las nativas Compsomyiops fulvicrura (Robineau-Desvoidy) y Sarconesia chlorogaster (Wiedemann) predominaron tanto en áreas inhabitadas como en aquellas con bajo impacto humano. En los cebos utilizados para las capturas, se observó mayor proporción de hembras en todas las especies, excepto Sarconesia chlorogaster que mostró mayor proporción de machos.
Interview: Akromegalie
Schnack C
Journal für Klinische Endokrinologie und Stoffwechsel , 2009,
Abstract:
Dr. Pablo Pérez Goodwyn 23-XI-1971 - 8-VIII-2009
Juan A Schnack
Revista de la Sociedad Entomol?3gica Argentina , 2009,
Abstract:
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