The dragonfly communities in Sweden may be affected in many ways. Loss of habitats, habitat alteration or even environmental toxins might have a negative impact on the communities. A new threat to the communities and to the species in general is climate change. In this study I examined whether the dragonfly composition had changed in an area in central Sweden between 1997 and 2010. I did a nestedness matrix to see if the dragonfly composition (only using partivoltine species) was more or less nested in 2010 than it was in 1997, i.e. if there was more unexpected species recorded in the area. I also looked at the surrounding of the lakes and whether the species were considered to be generalist species or specialist species. I found that the dragonfly composition had changed during these 13 years and that the composition was more nested in 1997 than in 2010, i.e. there was more unexpected species in the 2010 survey. I also recorded seven new species for the area and that six species had disappeared. Six species had gone from being generalists to being specialists. The surroundings had not changed significantly and I thus see climate change as a possible explanation to these changes.

Thesis--University of Florida. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 117-123).

No description available.

SANTRAUKA Pastaraisiais metais Lietuvoje stebėtos naujos mūsų faunai žirgelių rūšys: Orthetrum brunneum, Aeschna affinis. Šių rūšių aptikimas Lietuvoje dar kartą patvirtina faktą, kad per pastaruosius 10- 15 metų vyksta pietinių ir pietrytinių rūšių plitimas į šiaurę. Taip pat buvo stebėtos šiaurės Eurazijos stenotopinės rūšys: Aeschna crenata ir Coenagrion johannsoni.. 2007 metų LR Raudonosios knygos redakcijoje įrašyta 13 Lietuvoje gyvenančių žirgelių rūšių. Tai sudaro 1/5 Lietuvos žirgelių faunos. Žirgeliai yra puikūs aplinkos kokybės sąlygų vandens buveinėse indikatoriai. Rūšys nyksta dėl prastėjančių sąlygų buveinėse bei dėl pačių buveinių nykimo, todėl ir jų apsauga galima tik kartu su biotopų, kuriuose jie gyvena, apsauga. Žirgelių tyrimai vykdyti 2005- 2006 metais Labanoro regioninio parko buveinėse: upėse (Žeimenoje, Lakajoje, Peršokšnoje), eutrofiniuose ežeruose (M. Siauryje, D. Siauryje, Ilgyje, Peršokšnuose) bei distrofiniuose Girutiškio rezervato ežerėliuose (Petrežeryje, Akutėje, Verpstinyje, Bežuvyje). Apibendrinus duomenis nustatytos 43 žirgelių rūšys. Palyginus visas upes pagal lervų ir išnarų kompleksus nustatyta, kad Lakajos ir Peršokšnos upės rūšių kompleksais artimiausios. Tai lėmė abiejų upių substrato tipų panašumas. Pagal suaugėlių rūšių kompleksus nustatyta, kad rūšių kompleksais artimiausios Žeimenos ir Lakajos upės. Pagal žirgelių lervų ir išnarų kompleksus lyginant aštuonis ežerus nustatyta, kad Ilgio bei D. Siaurio ežerai panašiausi savo rūšių... [toliau žr. visą tekstą] / SUMMARY DISTRIBUTION OF DRAGONFLIES IN HABITATS OF SOUTHEASTERN PART OF LABANORAS REGIONAL PARK During the last 10- 15 years population numbers and frequency of records of southern and southeastern species have significantly increased in central Europe, and a northward range expantion of some of these species has also been noticed. Stenotopic species Aeschna crenata, Coenagrion johannsoni was observed in Lithuania. In the edition of Lithuanian Red Book in 2007 there are 13 species of dragonflies. Dragonflies are good indicators for the environmental quality in water habitats. Species dissapear because conditions in the habitats make worse or the habitats dissapear. Protection of dragonflies species is posibble just with protection of habitats. The investigation of dragonflies were carried out in Labanoras Regional Park in 2005- 2006. Some different habitats were selected: rivers (Žeimena, Lakaja, Peršokšna), eutrofic lakes (M. Siaurys, D.Siaurys, Ilgis, Peršokšnai), dystrophic lakes (Petrežeris, Akutė, Verpstinis, Bežuvis). The 43 species of dragonflies were registered in investigated areas. Lakaja river larvae and exuvia species complex is similar to Peršokšna river. These two rivers were similar in substrate type. Žeimena river adults species complex is similar to Lakaja river. All lakes were compared with larvae and exuvia complexes. There are found 36 species in lakes habitat. To compare all habitats I calculated Shannon biodiversity index. In Lakaja river there is the... [to full text]

Thesis (M.Sc.)--Acadia University, 2001. / Includes bibliographical references (leaves 104-121). Also available on the Internet via the World Wide Web.

This investigation was concerned with three aspects of the problem of passive dispersal of algae and protozoa by aquatic insects: the role of odonates in passive dispersal of viable small aquatic organisms, the passage of viable algae and protozoa through digestive tracts of field-collected herbivorous and carnivorous aquatic insects, and the viability duration of selected algae, during insect transport under monitored conditions.

Submitted by Dominick Jesus (dominickdejesus@hotmail.com) on 2016-02-04T20:04:17Z No. of bitstreams: 2 Tese_Ulisses Gaspar Neiss.pdf: 19676969 bytes, checksum: 63e95c70fb3513945e8d4caf9a0b39d5 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2016-02-04T20:04:17Z (GMT). No. of bitstreams: 2 Tese_Ulisses Gaspar Neiss.pdf: 19676969 bytes, checksum: 63e95c70fb3513945e8d4caf9a0b39d5 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2012-09-18 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / Fundação de Amparo à Pesquisa do Estado do Amazonas - FAPEAM / Odonata has a high diversity of species in tropical regions; however, major gaps in knowledge still exist in many biomes, including the Amazon rainforest. Most studies of Odonata in the Neotropics focus on adults. Thus, the taxonomy and biology of the immature forms are still little known: less than one-third of the species recorded from Brazil have their larvae described. The objective of this study was to increase knowledge of the taxonomy, distribution and biology of Odonata, with emphasis on larval stages in the Central Amazon. During the years 2008 and 2009 collections were made in approximate 150 well preserved streams to obtain adults and larvae in different localities and municipalities in the Amazonas State: Manacapuru, Manaus, Novo Airão, Presidente Figueiredo, Rio Preto da Eva, and the areas of environmental protection Reserva Florestal Ducke (Manaus), Reserva Biológica do Uatumã (Presidente Figueiredo) and Parque Estadual Serra do Aracá (Barcelos). The larvae were used for breeding under laboratory conditions. Identification of adults and associated larvae resulted in 175 species in 77 genera, 15 families already reported in Brazil, with 41 new records for the state of Amazonas, of which 22 were new for the country. Dimeragrion Calvert (Megapodagrionidae) is recorded for the first time in Brazil through the D. percubitale Calvert, collected in the region of the tepuis in Serra do Aracá (1115 m.a.s.l). Three new species are described, including a new genus (Coenagrionidae gen. nov. sp. nov.; Erythrodiplax sp. nov. and Gynacantha sp. nov.) from adults emerging under laboratory conditions. Thirteen last-instar larvae, hitherto unknown, are also described: Macrothemis rupicola Rácenis; Mecistogaster lucretia (Drury); Megapodagrion megalopus (Selys); Misagria divergens De Marmels; Mnesarete astrape De Marmels; Mnesarete cupraea (Selys); Orthemis attenuata (Erichson); Palaemnema brasiliensis Machado; Perilestes solutus Williamson and Williamson; Psaironeura tenuissima (Selys); Staurophlebia wayana Geijskes; Uracis siemensi Kirby and Zenithoptera lanei Santos. Keys are also provided for identification of families and genera of last-instar larvae known in the state of Amazonas and, when possible, for Brazil (except Libellulidae). Analysis of stomach contents of 992 larvae of Odonata, through dissecting the anterior intestine, collected from different substrates in streams located in the Reserva Ducke and Reserva Uatumã, showed that Chironomidae was the most abundant prey (38.4%) and was also the most frequent (41%), followed by Baetidae (13.6% and 17.8%), Leptophlebiidae (8.8% and 12%), Trichoptera (11.5% and 14.4%), Oligochaeta (5.2% and 6.7%), Simuliidae (4% and 4.7%) and Acarina (4.1% and 4.9%). / Odonata apresenta alta diversidade de espécies nas regiões tropicais, no entanto, ainda há grandes lacunas de conhecimento em muitos biomas, incluindo a floresta Amazônica. A maioria dos estudos realizados com Odonata na região Neotropical tem como foco os adultos, dessa forma, a taxonomia e biologia das formas imaturas permanecem pouco conhecidas, menos de 1/3 das espécies registradas para o Brasil tem suas larvas descritas. O objetivo deste trabalho foi incrementar o conhecimento sobre a taxonomia, distribuição e biologia de Odonata, com ênfase nos estágios larvais, na Amazônia Central. Para isso, durante os anos de 2008 e 2009 foram realizadas coletas em aproximadamente 150 igarapés preservados para obtenção de adultos e larvas para criação em condições de laboratório, em diversas localidades e municípios do Estado do Amazonas: Manacapuru, Manaus, Novo Airão, Presidente Figueiredo, Rio Preto da Eva, incluindo as áreas de proteção ambiental Reserva Florestal Ducke (Manaus), Reserva Biológica do Uatumã (Presidente Figueiredo) e Parque Estadual Serra do Aracá (Barcelos). A identificação dos adultos e larvas associadas resultou em 175 espécies distribuídas em 77 gêneros, incluídos nas 15 famílias ocorrentes no Brasil, com 41 novos registros para o Estado do Amazonas, sendo 22 registros novos para o Brasil. Dimeragrion Calvert (Megapodagrionidae) é registrado pela primeira vez no Brasil, através de D. percubitale Calvert, coletada na região dos tepuis na Serra do Aracá (1.115 m alt.). Três espécies novas são descritas, incluindo um novo gênero (Coenagrionidae gen. nov. sp. nov.; Erythrodiplax sp. nov. e Gynacantha sp. nov.) a partir de adultos emergidos em condições de laboratório. Treze larvas de último estádio, até então desconhecidas, também são descritas: Macrothemis rupicola Rácenis; Mecistogaster lucretia (Drury); Megapodagrion megalopus (Selys); Misagria divergens De Marmels; Mnesarete astrape De Marmels; Mnesarete cupraea (Selys); Orthemis attenuata (Erichson); Palaemnema brasiliensis Machado; Perilestes solutus Williamson e Williamson; Psaironeura tenuissima (Selys); Staurophlebia wayana Geijskes; Uracis siemensi Kirby e Zenithoptera lanei Santos. Chaves para identificar família e gênero de larvas de último estádio conhecidas para o Estado do Amazonas e quando possível para o Brasil (exceto Libellulidae), também são propostas. A análise do conteúdo estomacal de 992 larvas de Odonata, realizada através da dissecção do intestino anterior, coletadas em diferentes substratos localizados em igarapés da Reserva Ducke e Reserva do Uatumã, revelou que Chironomidae foi a presa mais abundante (38,4%) e frequente (41%), seguido por Baetidae (13,6% e 17,8%), Leptophlebiidae (8,8% e 12%), Trichoptera (11,5% e 14,4%), Oligochaeta (5,2% e 6,7%), Simuliidae (4% e 4,7%) e Acarina (4,1% e 4,9%).

Submitted by FERNANDA DA SILVA VON PORSTER (fdsvporster@univates.br) on 2015-04-28T19:18:12Z No. of bitstreams: 3 license_text: 22573 bytes, checksum: 52b1b0e0904a0f02da770d316346fc65 (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5) 2014SamuelRenner.pdf: 1926865 bytes, checksum: b145097869ff708e628ea5a02e775acf (MD5) / Approved for entry into archive by Ana Paula Lisboa Monteiro (monteiro@univates.br) on 2015-05-04T14:48:24Z (GMT) No. of bitstreams: 3 license_text: 22573 bytes, checksum: 52b1b0e0904a0f02da770d316346fc65 (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5) 2014SamuelRenner.pdf: 1926865 bytes, checksum: b145097869ff708e628ea5a02e775acf (MD5) / Made available in DSpace on 2015-05-04T14:48:24Z (GMT). No. of bitstreams: 3 license_text: 22573 bytes, checksum: 52b1b0e0904a0f02da770d316346fc65 (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5) 2014SamuelRenner.pdf: 1926865 bytes, checksum: b145097869ff708e628ea5a02e775acf (MD5) / A fragmentação dos ambientes causada pelo desenvolvimento humano, trás consigo muitas consequências, sendo a principal delas o desequilíbrio ecológico, perda de biodiversidade e degradação dos ambientes aquáticos. Um dos mais ricos biomas do nosso planeta é a Floresta Atlântica, o qual ainda é pouco conhecido para determinados grupos animais, um exemplo disso é a ordem Odonata. Este bioma encontra-se atualmente fragmentado, recebendo todo o tipo de pressão. A formação florestal encontrada no sul do Brasil, é a Floresta Ombrófila Mista (FOM), uma formação florestal pertencente ao Bioma Mata Atlântica. No Estado do Rio Grande do Sul, o bioma Mata Atlântica ocupava as regiões mais altas e de encosta, cobrindo praticamente toda metade norte do estado. A FOM é caracterizada principalmente pela presença da Araucaria angustifolia (Bertol.) Kuntze (Araucariaceae). Atualmente os fragmentos remanescentes da FOM encontram-se dispersos em matriz de campo, agricultura ou áreas urbanas. Neste contexto o inventariamento de espécies desempenha um valioso papel na conservação destes remanescentes florestais. O presente trabalho foi desenvolvido em um grande fragmento de floresta, o qual contempla uma reserva ecológica: a Floresta Nacional de São Francisco de Paula/RS. Foi desenvolvido um inventariamento de espécies de Odonata, utilizando-se 30 pontos de amostragem, distribuídos entre quatro tipos de vegetação e três tipos de sistemas aquáticos. Foram registradas 47 espécies, distribuídas entre oito famílias. A composição da assembleia de Odonata foi comparada entre diferentes tipos de ambientes aquáticos: rios, lagos e banhados, e diferentes tipos de formações vegetais: mata nativa (FOM), araucária plantada, Pinus e campos. Foi encontrada maior riqueza de espécies em florestas de pinus, sendo esta composta principalmente por espécies generalistas. Foi utilizada e adaptada uma metodologia de seleção de espécies indicadoras de qualidade ambiental. Assim aprofundou-se o escasso conhecimento sobre esta ordem na Floresta Atlântica/FOM, gerando uma contribuição para medidas futuras de conservação e definição de áreas de proteção ambiental. / The human development brings several consequences to the environment, being the most remarkable the fragmentation of natural systems, resulting in ecological imbalance, biodiversity loss and degradation of the watershed. One of the richest biomes of this planet is the Atlantic Forest, which still poorly known in many animal groups, one example is the Odonata order. Actually this biome remains, under pressure in a fragmented mosaic. The forest formation occurring in the South of Brazil is the Mixed Ombrophilous Forest (MOF), a subtype of the Atlantic Forest. In the state of Rio Grande do Sul, this biome covered the high regions and the slopes of the Atlantic Ocean, occurring mostly in the northern half of the state. The MOF is remarkable by the presence of the Brazilian Pine (Araucaria angustifolia). Nowadays the remnants of the MOF are disperse in open fields, agriculture or urban matrix. In this context, the species inventory can play a key role in the conservation of these forest remnants. The present study was developed in a big forest fragment, in which exists an ecologic reserve: the Floresta Nacional de São Francisco de Paula, RS. The dragonfly species inventory was performed by sampling 30 aquatic sources distributed in four vegetation types and three types of aquatic systems. Were registered 47 species scattered in eight families. The Odonata assemblages found in all the types of water (rivers, lakes and swamps) and vegetation types (MOF, araucaria forest, pinus forest and open fields) were statistically compared. In the pinus areas was found the richest assemblage, being composed mainly by generalist species. Was applied and adapted a known methodology for the selection of potential indicator species. The poor knowledge of the Odonata order was improved in the Atlantic Forest/MOF, contributing for future conservation measures and definition of priority protection areas.

El orden Odonata está integrado por insectos de tamaño pequeño a grande, de distribución cosmopolita, depredadores, exopterigotas, de condición paleóptera y con desarrollo hemimetábolo: larvas (ninfas o náyades) mayormente acuáticas y adultos aéreos. El suborden Zygoptera, está formado por organismos gráciles, de tamaño pequeño a grande con vuelo generalmente lento. Las larvas son delgadas con tres conspicuas laminillas caudales en el extremo posterior del abdomen. La familia Coenagrionidae, es una de las familias más numerosa dentro del suborden. El género Cyanallagma fue establecido por Kennedy en 1920. En Argentina está representado por solo tres especies: C. bonariense (Ris, 1913), C, interruptum (Selys, 1876) y C. nigrinuchale (Selys, 1876). Cyanallagma interruptum (Selys, 1876) es típica de Patagonia, habita generalmente ambientes lénticos de diferentes tipos, temporarios o permanentes, (lagunas, charcas y mallines) tanto en áreas de bosque como de estepa. El desarrollo post-embrionario está poco estudiado en la Argentina y es importante para poder entender mejor el voltinismo y la regulación estacional, así como también para identificar especies a partir de estadios larvales tempranos, que es prerrequisito para el estudio de la ecología larval. Por otro lado, el estado larval es altamente específico del cuerpo de agua que habita. Las características del ambiente limitan la supervivencia de una u otra especie. Los diferentes estadios larvales se distribuyen de modo diferente dentro del cuerpo de agua, posiblemente por la disposición de comida, ausencia y/o presencia de depredadores; o bien por la preferencia de uno u otro sustrato. El objetivo principal de esta tesis es determinar diversos aspectos biológicos de poblaciones larvales naturales (no criadas en laboratorio) de la especie Cyanallagma interruptum (Selys, 1876) y su relación con variables físicas-químicas y bióticas en dos lagunas: El Trébol y Los Juncos de la Región Norte de la Patagonia Argentina. Se obtuvieron como resultados 9 estadios larvales de Cyanallagma interruptum (Selys, 1876) en la laguna El Trébol y 10 en la laguna Los Juncos. Cyanallagma interruptum es una especie de verano según Corbet (1956, 1999, 2002) y no se observó sincronización estacional. En ambas lagunas la especie presentó univoltinismo. El fenómeno de diapausa ocurre en los meses de invierno y en los estadios de talla grande e intermedia. La descripción del último estadio larval (F-0) difiere de la descripción hecha por Bulla en 1973. Existe un dimorfismo sexual en los estadios larvales de C. interruptum que se evidencia a partir del estadio F-4 y hasta F-0 (último estadio larval) por la presencia de esbozos genitales. Se observó una diferencia significativa en la distribución espacial de los estadios larvales de C. interruptum desde la costa hacia el centro en ambas lagunas estudiadas. Se observó preferencia de sustrato por los diferentes estadios larvales de C. interruptum, los estadios larvales de mediano y mayor tamaño seleccionaron Potamogeton sp., los estadios de pequeña talla prefirieron Myriophyllum sp. y Potamogeton sp. Ambas lagunas presentaron características oligotróficas durante el período en que se realizó éste estudio. Sin embargo, las diferencias en la distribución y en la abundancia relativa de los taxa de la fauna asociada, y las variables físico-químicas influyeron en la distribución de los estadios larvales desde la costa hacia el centro de ambas lagunas estudiadas. La temperatura ambiente y las concentraciones de los iones P-PO4, N-NH4, N-NO2 y N-NO3, tuvieron influencia sobre la abundancia relativa de la fauna asociada y por ende en el ciclo larval de C. interruptum.

Through wastewater entering aquatic environments, aquatic insects are continuously exposed to pharmaceuticals including neurologically active antihistamines. The antihistamine hydroxyzine has previously been found to lower activity in damselflies and to reach 2000 times the concentration of surrounding water in damselfly tissue. The purpose of this short-term exposure study was to investigate if hydroxyzine also bioaccumulates in dragonflies and if dilute hydroxyzine (362 ± 50, mean ng/l ± SD) have effects on predator-prey interactions between dragonfly Aeshna grandis and damselfly Coenagrion hastulatum larvae, i.e. number of attacks and predation success. Predators and prey were captured and exposed during one, three or five days (with controls) before taking part in predation experiments; Dragonflies were put in separate containers with six damselflies, they were video recorded and attacks and predated damselflies noted during four hours. Tissue concentrations of hydroxyzine were analyzed from all dragonflies and a subsample of the damselflies showing a mean bioconcentration factor (BCF) of 27 and 7 respectively, surprisingly much lower than previous research. There was no difference in attack rate or predation efficiency between controls and exposed dragonflies. However, dragonflies exposed for five days were found to attack more and capture more prey than dragonflies exposed for one day, a change that was not seen in the controls. This confounding factor motivates further studies to clarify if hydroxyzine after a period of exposure can have a sublethal effect altering foraging and/or predator avoidance traits with the net result of increased predation success for dragonflies in the predator-prey interaction between dragonflies and damselflies.