Chironomus Meigen, 1803 (Diptera: Chironomidae) na cidade de Manaus, AM, Brasil: taxonomia e biologia
The genus Chironomus Meigen, 1803 (Diptera: Chironomidae) is the type genus of this family. There s over than 100 species described and the wide distribution occurring in all zoogeographical regions except Antarctica. In Brazil, 16 species are known, most recorded for the Southeast region, four spec...
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| Other Authors: | , |
| Format: | Thesis |
| Language: | Portuguese |
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Instituto Nacional de Pesquisas da Amazônia - INPA
2012
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| Online Access: | https://repositorio.inpa.gov.br/handle/1/12447 http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4551194E8 |
| Summary: | The genus Chironomus Meigen, 1803 (Diptera: Chironomidae) is the type genus of this family. There s over than 100 species described and the wide distribution occurring in all zoogeographical regions except Antarctica. In Brazil, 16 species are known, most recorded for the Southeast region, four species are described on the Amazon: C. gigas, C. paragigas, C. strenzkei and C. latytilus. In this study, a new species of Chironomus was described and the bionomic and biometric information obtained are presented by observation under laboratory conditions. Date behavior of swarming, mating, egg development time, the larva and pupa, as well as information about the longevity of adults are knowned. Chironomus manaos sp. nov. differs from other Neotropical species by the color of the abdomen and formed the volsela be more strongly arched. The female lays on average 600 (±104.29) eggs, the egg mass is 16.6 (±3.07, n = 5) mm long and 1.59 (±0.04, n = 5) mm wide. The eggs measure 0.24 (±0.0162, n = 50) long and 0.10 (±0.0074) mm in width and the color is dark brown. The first instar larvae have a mean lenght of 54.67 (±4.17, n = 81) μm, 2th instar 93.74 (±4.47, n = 53), 3th instar 157.12 (±7.18, n = 68) μm and 4th instar 257.58 (±16.75, n = 314) μm. The growth rate of larvae follows Dyar s rule, which is in geometric progression with a mean ratio of 1.67 (±0.03). The swarm has its beginnings in the late afternoon, around about seven hours, starting intercourse that lasts a few seconds. The development time of eggs is 2 ½ days at room temperature (26°C). At hatch, the larvae remain for approximately 12 hours within the mass, where they feed. In abandoning the mass ovigerous, the larvae disperse in the substrate where they will complete their development to adult emergence. The larvae complete their development in 12 days. The pupal stage lasts 2 (±0.24) days. The duration of life adult males was 3.44 (±0.7045) days, and females of 3.22 (±0.6481) days. This species created unter laboratory conditions can be used as test ... |
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