Intrasexual egg laying in Belostoma oxyurum. A note on its ecological determinants (Hemiptera, Belostomatidae)
Intrasexual egg laying was detected in a female giant water bug, Belostoma oxyurum (Dufour) which was capturad carrying six fertilized eggs on its back. The location of the eggs does not belong to the pattern known for incubant males of this species. This finding is attributed to the absolu...
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| Formato: | Artículo revista |
| Lenguaje: | Inglés |
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Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste)
2023
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| Acceso en línea: | https://revistas.unne.edu.ar/index.php/eco/article/view/7120 |
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I48-R154-article-71202023-12-01T21:32:12Z Intrasexual egg laying in Belostoma oxyurum. A note on its ecological determinants (Hemiptera, Belostomatidae) Oviposición intrasexual en Belostoma oxyurum. Una nota sobre sus determinantes ecológicos Schnack, Juan A Domizi, Eduardo A. Intrasexual egg laying was detected in a female giant water bug, Belostoma oxyurum (Dufour) which was capturad carrying six fertilized eggs on its back. The location of the eggs does not belong to the pattern known for incubant males of this species. This finding is attributed to the absolute shortage of a sexual resource constituted by the male back space. Such environmental circuinstance was recorded in the field when this female was captured. The adult population from which it was taken included a hundred percent of both, gravid females and incubant males, and sex ratio was female biased though without statistical significance. The observed phenomenon has also been recorded in the Nearctic species Belostoma flumineum Say. Comparative considerations referred to bothspecies are included. Un caso de oviposición intrasexual fue detectado en una población de Belostoma oxyurum (Dufour) localizada en un limnótopo léntico de Pinamar, Provincia de Buenos Aires. El fenómeno observado es atribuido a la limitación del recurso sexual constituido por el área de postura, es decir, la superficie dorsal de los machos reproductivos. Tal circunstancia ambiental fue registrada en el campo cuando la “hembra incubante” era extraída de su habitat. La población de adultos incluía entonces, el máximo porcentaje de hembras grávidas y machos incubantes, ostentando elevados valores de fecundidad potencial y real, y un predominio, aunque no significativo, de hembras sobre machos. Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2023-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares application/pdf https://revistas.unne.edu.ar/index.php/eco/article/view/7120 10.30972/eco.12237120 Ecosur; 1985: vol. 12-13, nos. 23-24; 123-125 0325-108X eng https://revistas.unne.edu.ar/index.php/eco/article/view/7120/6574 |
| institution |
Universidad Nacional del Nordeste |
| institution_str |
I-48 |
| repository_str |
R-154 |
| container_title_str |
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) |
| language |
Inglés |
| format |
Artículo revista |
| author |
Schnack, Juan A Domizi, Eduardo A. |
| spellingShingle |
Schnack, Juan A Domizi, Eduardo A. Intrasexual egg laying in Belostoma oxyurum. A note on its ecological determinants (Hemiptera, Belostomatidae) |
| author_facet |
Schnack, Juan A Domizi, Eduardo A. |
| author_sort |
Schnack, Juan A |
| title |
Intrasexual egg laying in Belostoma oxyurum. A note on its ecological determinants (Hemiptera, Belostomatidae) |
| title_short |
Intrasexual egg laying in Belostoma oxyurum. A note on its ecological determinants (Hemiptera, Belostomatidae) |
| title_full |
Intrasexual egg laying in Belostoma oxyurum. A note on its ecological determinants (Hemiptera, Belostomatidae) |
| title_fullStr |
Intrasexual egg laying in Belostoma oxyurum. A note on its ecological determinants (Hemiptera, Belostomatidae) |
| title_full_unstemmed |
Intrasexual egg laying in Belostoma oxyurum. A note on its ecological determinants (Hemiptera, Belostomatidae) |
| title_sort |
intrasexual egg laying in belostoma oxyurum. a note on its ecological determinants (hemiptera, belostomatidae) |
| description |
Intrasexual egg laying was detected in a female giant water bug, Belostoma oxyurum (Dufour) which was capturad carrying six fertilized eggs on its back. The location of the eggs does not belong to the pattern known for incubant males of this species. This finding is attributed to the absolute shortage of a sexual resource constituted by the male back space. Such environmental circuinstance was recorded in the field when this female was captured. The adult population from which it was taken included a hundred percent of both, gravid females and incubant males, and sex ratio was female biased though without statistical significance. The observed phenomenon has also been recorded in the Nearctic species Belostoma flumineum Say. Comparative considerations referred to bothspecies are included. |
| publisher |
Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) |
| publishDate |
2023 |
| url |
https://revistas.unne.edu.ar/index.php/eco/article/view/7120 |
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2024-08-21T22:38:56Z |
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2024-08-21T22:38:56Z |
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