Fecundity, parity, and adult feeding relationships among Nyssorhynchus malaria vectors from Venezuela
Relative to their pre-engorgement weights, nulliparous Anopheles nuneztovari consumed significantly smaller blood meals than A. marajoara, A. triannulatus or A. aquasalis. When females were deprived of sugar before blood feeding, only one-quarter of A. nuneztovari, but more than two-thirds of A. mar...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Fundação Oswaldo Cruz (FIOCRUZ)
1991-03-01
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| Series: | Memorias do Instituto Oswaldo Cruz |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761991000100010 |
| _version_ | 1797704741066637312 |
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| author | L. P. Lounibos Jan Conn |
| author_facet | L. P. Lounibos Jan Conn |
| author_sort | L. P. Lounibos |
| collection | DOAJ |
| description | Relative to their pre-engorgement weights, nulliparous Anopheles nuneztovari consumed significantly smaller blood meals than A. marajoara, A. triannulatus or A. aquasalis. When females were deprived of sugar before blood feeding, only one-quarter of A. nuneztovari, but more than two-thirds of A. marajoara, A. triannulatus and A. aquasalis matured eggs. Sugar feeding before blood, or two sucessive blood meals by sugar-deprived females, increased the proportion of nulliparous a. nuneztovari which developed eggs, but not significantly so. Nearly all individuals of nulliparous, sugar-fed A. marajoara, A. triannulatus and A. aquasalis matured eggs after one blood feeding. Among A. nuneztovari, A. marajoara and A. aquasalis that matured some eggs in the laboratory, there were no positive correlations between the number of eggs developed and relative vlood mealsize. However, blood meals larger than the mean size significantly increased the chance that A. nuneztovari would develop some eggs. Mean fecundities of gravid A. nuneztovari and A. marajoara reared in the laboratory were significantly lower than those of the same species captured at human bait in nature. Post-engorgement access to sugar by A. nuneztovari (captured at human bait) did not influence fecundity, but significantly enhanced survivorship and the proporticon of individuals which retained eggs. Release-recapture experiments revealed that relatively small blood meals are typical of A. nuneztovari only during the first gonotrophic cycle. We suggest that multiple blood feeding, seemingly necessary for most A. nuneztovari to develop a first clutch of eggs, may increase the probability of infection with Plasmodium vivax where this mosquito species is a primary vector. |
| first_indexed | 2024-03-12T05:25:57Z |
| format | Article |
| id | doaj.art-933d15fc1a4141398fc687643321ad2f |
| institution | Directory Open Access Journal |
| issn | 0074-0276 1678-8060 |
| language | English |
| last_indexed | 2024-03-12T05:25:57Z |
| publishDate | 1991-03-01 |
| publisher | Fundação Oswaldo Cruz (FIOCRUZ) |
| record_format | Article |
| series | Memorias do Instituto Oswaldo Cruz |
| spelling | doaj.art-933d15fc1a4141398fc687643321ad2f2023-09-03T07:24:45ZengFundação Oswaldo Cruz (FIOCRUZ)Memorias do Instituto Oswaldo Cruz0074-02761678-80601991-03-01861576610.1590/S0074-02761991000100010Fecundity, parity, and adult feeding relationships among Nyssorhynchus malaria vectors from VenezuelaL. P. LounibosJan ConnRelative to their pre-engorgement weights, nulliparous Anopheles nuneztovari consumed significantly smaller blood meals than A. marajoara, A. triannulatus or A. aquasalis. When females were deprived of sugar before blood feeding, only one-quarter of A. nuneztovari, but more than two-thirds of A. marajoara, A. triannulatus and A. aquasalis matured eggs. Sugar feeding before blood, or two sucessive blood meals by sugar-deprived females, increased the proportion of nulliparous a. nuneztovari which developed eggs, but not significantly so. Nearly all individuals of nulliparous, sugar-fed A. marajoara, A. triannulatus and A. aquasalis matured eggs after one blood feeding. Among A. nuneztovari, A. marajoara and A. aquasalis that matured some eggs in the laboratory, there were no positive correlations between the number of eggs developed and relative vlood mealsize. However, blood meals larger than the mean size significantly increased the chance that A. nuneztovari would develop some eggs. Mean fecundities of gravid A. nuneztovari and A. marajoara reared in the laboratory were significantly lower than those of the same species captured at human bait in nature. Post-engorgement access to sugar by A. nuneztovari (captured at human bait) did not influence fecundity, but significantly enhanced survivorship and the proporticon of individuals which retained eggs. Release-recapture experiments revealed that relatively small blood meals are typical of A. nuneztovari only during the first gonotrophic cycle. We suggest that multiple blood feeding, seemingly necessary for most A. nuneztovari to develop a first clutch of eggs, may increase the probability of infection with Plasmodium vivax where this mosquito species is a primary vector.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761991000100010Anopheles (Nyssorhynchus)Venezuelamosquitoblood meal sizefecundityparityegg development |
| spellingShingle | L. P. Lounibos Jan Conn Fecundity, parity, and adult feeding relationships among Nyssorhynchus malaria vectors from Venezuela Memorias do Instituto Oswaldo Cruz Anopheles (Nyssorhynchus) Venezuela mosquito blood meal size fecundity parity egg development |
| title | Fecundity, parity, and adult feeding relationships among Nyssorhynchus malaria vectors from Venezuela |
| title_full | Fecundity, parity, and adult feeding relationships among Nyssorhynchus malaria vectors from Venezuela |
| title_fullStr | Fecundity, parity, and adult feeding relationships among Nyssorhynchus malaria vectors from Venezuela |
| title_full_unstemmed | Fecundity, parity, and adult feeding relationships among Nyssorhynchus malaria vectors from Venezuela |
| title_short | Fecundity, parity, and adult feeding relationships among Nyssorhynchus malaria vectors from Venezuela |
| title_sort | fecundity parity and adult feeding relationships among nyssorhynchus malaria vectors from venezuela |
| topic | Anopheles (Nyssorhynchus) Venezuela mosquito blood meal size fecundity parity egg development |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761991000100010 |
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