Variation in the hatching response of Ochlerotatus albifasciatus egg batches (Diptera: Culicidae) in temperate Argentina
Egg hatching of winter-collected Ochlerotatus albifasciatus was studied for six months. Batches of eggs were divided into two groups, one of them was stored in the laboratory at 23°C and 12:12 photoperiod, and the other in the field under dead leaves. Every month, from July to December, eggs...
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| Format: | Article |
| Language: | English |
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Fundação Oswaldo Cruz (FIOCRUZ)
2006-02-01
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| Series: | Memorias do Instituto Oswaldo Cruz |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762006000100009 |
| _version_ | 1797718421810446336 |
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| author | Raúl Ernesto Campos Victoria Elena Sy |
| author_facet | Raúl Ernesto Campos Victoria Elena Sy |
| author_sort | Raúl Ernesto Campos |
| collection | DOAJ |
| description | Egg hatching of winter-collected Ochlerotatus albifasciatus was studied for six months. Batches of eggs were divided into two groups, one of them was stored in the laboratory at 23°C and 12:12 photoperiod, and the other in the field under dead leaves. Every month, from July to December, eggs from the two groups were flooded under both laboratory and field conditions. Unhatched eggs were returned to the original condition and flooded two more times separated by ten-day intervals. Results show that egg diapause is expressed in different intensities, not only on eggs exposed to different conditions but also in those exposed to the same condition, even when they were laid by the same female. Successive inundations yielded incomplete hatches of eggs, and favored the hatching response in the next flooding. Low environmental temperatures before and during the flooding depressed hatching response. This shows that eggs need a warm period before flooding as well as warm temperatures during flooding, to hatch. As drought period was longer hatching response increased, but this was also accompanied by warmer environmental conditions. The experiment performed in laboratory did not show that increment. Field studies showed that a layer of dead leaves protected eggs from extreme temperatures. |
| first_indexed | 2024-03-12T08:51:35Z |
| format | Article |
| id | doaj.art-0fc036f81b8d4fdfa255cb754ec9f063 |
| institution | Directory Open Access Journal |
| issn | 0074-0276 1678-8060 |
| language | English |
| last_indexed | 2024-03-12T08:51:35Z |
| publishDate | 2006-02-01 |
| publisher | Fundação Oswaldo Cruz (FIOCRUZ) |
| record_format | Article |
| series | Memorias do Instituto Oswaldo Cruz |
| spelling | doaj.art-0fc036f81b8d4fdfa255cb754ec9f0632023-09-02T16:17:53ZengFundação Oswaldo Cruz (FIOCRUZ)Memorias do Instituto Oswaldo Cruz0074-02761678-80602006-02-011011475310.1590/S0074-02762006000100009Variation in the hatching response of Ochlerotatus albifasciatus egg batches (Diptera: Culicidae) in temperate ArgentinaRaúl Ernesto CamposVictoria Elena SyEgg hatching of winter-collected Ochlerotatus albifasciatus was studied for six months. Batches of eggs were divided into two groups, one of them was stored in the laboratory at 23°C and 12:12 photoperiod, and the other in the field under dead leaves. Every month, from July to December, eggs from the two groups were flooded under both laboratory and field conditions. Unhatched eggs were returned to the original condition and flooded two more times separated by ten-day intervals. Results show that egg diapause is expressed in different intensities, not only on eggs exposed to different conditions but also in those exposed to the same condition, even when they were laid by the same female. Successive inundations yielded incomplete hatches of eggs, and favored the hatching response in the next flooding. Low environmental temperatures before and during the flooding depressed hatching response. This shows that eggs need a warm period before flooding as well as warm temperatures during flooding, to hatch. As drought period was longer hatching response increased, but this was also accompanied by warmer environmental conditions. The experiment performed in laboratory did not show that increment. Field studies showed that a layer of dead leaves protected eggs from extreme temperatures.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762006000100009CulicidaeOchlerotatus albifasciatusfloodwater mosquitoegg dormancydiapauseinstallment hatchingBuenos AiresArgentina |
| spellingShingle | Raúl Ernesto Campos Victoria Elena Sy Variation in the hatching response of Ochlerotatus albifasciatus egg batches (Diptera: Culicidae) in temperate Argentina Memorias do Instituto Oswaldo Cruz Culicidae Ochlerotatus albifasciatus floodwater mosquito egg dormancy diapause installment hatching Buenos Aires Argentina |
| title | Variation in the hatching response of Ochlerotatus albifasciatus egg batches (Diptera: Culicidae) in temperate Argentina |
| title_full | Variation in the hatching response of Ochlerotatus albifasciatus egg batches (Diptera: Culicidae) in temperate Argentina |
| title_fullStr | Variation in the hatching response of Ochlerotatus albifasciatus egg batches (Diptera: Culicidae) in temperate Argentina |
| title_full_unstemmed | Variation in the hatching response of Ochlerotatus albifasciatus egg batches (Diptera: Culicidae) in temperate Argentina |
| title_short | Variation in the hatching response of Ochlerotatus albifasciatus egg batches (Diptera: Culicidae) in temperate Argentina |
| title_sort | variation in the hatching response of ochlerotatus albifasciatus egg batches diptera culicidae in temperate argentina |
| topic | Culicidae Ochlerotatus albifasciatus floodwater mosquito egg dormancy diapause installment hatching Buenos Aires Argentina |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762006000100009 |
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