Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games?
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| Formato: | Online |
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Universidad de Costa Rica
2009
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/5478 |
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RBT54782022-06-06T18:14:30Z Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? Ramírez-Benavides, William Monge-Nájera, Julián B. Chavarría, Juan ajuste de la proporción sexual competencia por apareamiento a nivel local polinizadores de los higos Pegoscapus Costa Rica sex ratio adjustment local mate competition fig pollinators The fig pollinating wasps (Hymenoptera: Agaonidae) have obligate arrhenotoky and a breeding structure that fits local mate competition (LMC). It has been traditionally assumed that LMC organisms adjust the sex ratio by laying a greater proportion of male eggs when there is superparasitism (several foundresses in a host). We tested the assumption with two wasp species, Pegoscapus silvestrii, pollinator of Ficus pertusa and Pegoscapus tonduzi, pollinator of Ficus eximia (= F. citrifolia), in the Central Valley of Costa Rica. Total number of wasps and seeds were recorded in individual isolated naturally colonized syconia. There was a constant additive effect between the number of foundresses and the number of males produced in the brood of a syconium, while the number of females decreased. Both wasp species seem to have precise sex ratios and probably lay the male eggs first in the sequence, independently of superparasitism and clutch size: consequently, they have a non-random sex allocation. Each syconium of Ficus pertusa and of F. eximia colonized by one foundress had similar mean numbers of females, males, and seeds. The two species of wasps studied do not seem to adjust the sex ratio when there is superparasitism. Pollinating fig wasp behavior is better explained by those models not assuming that females do mathematical calculations according to other females sex ratios, size, number of foundresses, genetic constitution, clutch size or environmental conditions inside the syconium. Our results are in agreement with the constant male number hypothesis, not with sex ratio games. Universidad de Costa Rica 2009-09-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/5478 10.15517/rbt.v57i3.5478 Revista de Biología Tropical; Vol. 57 No. 3 (2009): Volume 57 – Regular number 3 – September 2009; 605−621 Revista de Biología Tropical; Vol. 57 Núm. 3 (2009): Volumen 57 – Número regular 3 – Setiembre 2009; 605−621 Revista Biología Tropical; Vol. 57 N.º 3 (2009): Volume 57 – Regular number 3 – September 2009; 605−621 2215-2075 0034-7744 10.15517/rbt.v57i3 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/5478/5224 Copyright (c) 2009 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
eng |
| format |
Online |
| author |
Ramírez-Benavides, William Monge-Nájera, Julián B. Chavarría, Juan |
| spellingShingle |
Ramírez-Benavides, William Monge-Nájera, Julián B. Chavarría, Juan Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? |
| author_facet |
Ramírez-Benavides, William Monge-Nájera, Julián B. Chavarría, Juan |
| author_sort |
Ramírez-Benavides, William |
| title |
Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? |
| title_short |
Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? |
| title_full |
Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? |
| title_fullStr |
Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? |
| title_full_unstemmed |
Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? |
| title_sort |
sex ratio in two species of pegoscapus wasps (hymenoptera: agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? |
| title_alt |
Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? |
| publisher |
Universidad de Costa Rica |
| publishDate |
2009 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/5478 |
| work_keys_str_mv |
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