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| Pamplin,Paulo Augusto Zaitune; Rocha,Odete; Marchese,Mercedes. |
| A riqueza de espécies de Oligochaeta foi investigada em duas represas construídas no curso do rio Tietê. Em cada represa foram obtidas 360 amostras de sedimento em 90 pontos de amostragem, utilizando-se uma draga Van Veen (378cm²), nos meses de janeiro, abril, julho e outubro de 2001. No total foram examinados 12.826 exemplares de oligoquetos pertencentes a 20 espécies, 10 gêneros e 4 famílias. Naididae e Dero foram a família e o gênero com maiores riquezas de espécies, com 14 e 9 espécies, respectivamente. Do total de espécies identificadas, 6 estiveram presentes em ambas represas, sendo Branchiura sowerbyi (Tubificidae) a espécie mais abundante nestes ambientes. A análise das amostras revelou que a maioria das espécies de oligoquetos é rara e de... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000100007 |
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| Galizzi,M. Celeste; Zilli,Florencia; Marchese,Mercedes. |
| The gut contents of nine genera of benthic Chironominae and Tanypodinae from the Middle Paraná River floodplain habitats (a lake and a secondary channel) were analyzed to determine their feeding patterns and functional feeding groups. Amorphous detritus, animal and vegetal tissues, and mineral materials (predominantly sand) were observed in the larval guts. Amorphous detritus were the main food item found for Polypedilum (Tripodura) sp., Chironomus gr. decorus sp., Endotribelos sp., Phaenopsectra sp., Cladopelma sp., and Pelomus sp. (Chironominae), while animal tissues (mainly oligochaetes) were the most important food item found for Ablabesmyia (Karelia) sp., Coelotanypus sp., and Procladius sp. (Tanypodinae). Dietary overlap was calculated for all pairs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gut content; Niche overlap; Chironominae; Tanypodinae. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000200001 |
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| Zilli,Florencia; Marchese,Mercedes; Paggi,Analía. |
| The larvae of Chironomidae are very important due to their density and role in aquatic food webs. Goeldichironomus holoprasinus Goeldi is one of the most abundant species of Chironomidae in man-made and natural systems, being widely used in water quality assessments. Because of its tolerance to stressing environmental factors, many studies have investigated the effects of stressors on G. holoprasinus anatomy and bionomic attributes. The main aim of this work was to describe G. holoprasinus life cycle attributes in laboratory conditions. The cephalic capsule growth among instars was 1.64 in average (Dyar proportion), whereas the total size growth was continuous. The average room temperature registered was 26ºC (18-33ºC). In this conditions the D value (time... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical Region; Argentina; Stage. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2009000400005 |
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| Capello,Soledad; Marchese,Mercedes; De Wysiecki,María L.. |
| Orthoptera assemblages associated with macrophytes of floodplain lakes of the Paraná River. The Orthoptera assemblage composition varies considerably, depending on habitat type. This study examines the spatiotemporal relationship between plant diversity, hydrometric level, environmental variables and the Orthoptera richness and abundance in floodplain lakes connected permanently or temporarily with the main channel of the Paraná River. The grasshoppers were collected fortnightly (April 2006May 2007). A total of 17 species were recorded and classified according to their frequency of occurrence in constant (7), accessory (4), or accidental (6) species. In the two lakes, the greater species richness and abundance was recorded in summer, thereby coinciding... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acrididae; Aquatic plants; Diversity index; Hydrological level; Insecta; Tettigonidae. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262013000100010 |
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