REPRODUCTIVE ASPECTS OF THE PRAWN <i>Macrobrachium amazonicum</i> IN A CONTINENTAL POPULATION LIVING DOWNSTREAM OF A HYDROELECTRIC DAM
The migratory behavior of females of the freshwater prawn Macrobrachium amazonicum (Heller, 1862) can indicate a strategy that optimizes the population establishment. With this idea in mind, we evaluated the reproductive biology of M. amazonicum, hypothesizing that females were evenly distributed d...
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| Format: | Article |
| Language: | English |
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Instituto de Pesca
2020-12-01
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| Series: | Boletim do Instituto de Pesca |
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| Online Access: | https://institutodepesca.org/index.php/bip/article/view/1545 |
| _version_ | 1797214616807276544 |
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| author | Lubia Maciel MIRANDA Larissa Rosa RODRIGUES João Alberto Farinelli PANTALEÃO Luciana Segura de ANDRADE |
| author_facet | Lubia Maciel MIRANDA Larissa Rosa RODRIGUES João Alberto Farinelli PANTALEÃO Luciana Segura de ANDRADE |
| author_sort | Lubia Maciel MIRANDA |
| collection | DOAJ |
| description |
The migratory behavior of females of the freshwater prawn Macrobrachium amazonicum (Heller, 1862) can indicate a strategy that optimizes the population establishment. With this idea in mind, we evaluated the reproductive biology of M. amazonicum, hypothesizing that females were evenly distributed downstream of Hydroelectric Dam. Specimens were collected monthly for one year, from six sites of Rio Grande river. The specimens were sexed and measured (carapace length; CL). A total of 14,697 adults were captured, 2,864 males (AM), 11,082 non-breeding females (AF) and 751 breeding females (BF). The smallest BF had 3.8 mm CL. The distribution of demographic groups was assessed by a Principal Component Analysis (PCA), which explained 95.16% of the distribution over the collection sites. Breeding females were more abundant in the sites closest to the dam. This result can be explained by rainfall, which varied significantly throughout the year. As the breeding females migrated upstream toward the dam and were more abundant there, our
hypothesis of homogeneous distribution was rejected. This behavior probably optimizes larval dispersion. The reproduction was continuous with peaks in the period preceding the maximum rainfall.
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| first_indexed | 2024-04-24T11:17:01Z |
| format | Article |
| id | doaj.art-51c2b1252fa34ba3833a7d3c17a5a9e4 |
| institution | Directory Open Access Journal |
| issn | 1678-2305 |
| language | English |
| last_indexed | 2024-04-24T11:17:01Z |
| publishDate | 2020-12-01 |
| publisher | Instituto de Pesca |
| record_format | Article |
| series | Boletim do Instituto de Pesca |
| spelling | doaj.art-51c2b1252fa34ba3833a7d3c17a5a9e42024-04-11T05:52:43ZengInstituto de PescaBoletim do Instituto de Pesca1678-23052020-12-01463REPRODUCTIVE ASPECTS OF THE PRAWN <i>Macrobrachium amazonicum</i> IN A CONTINENTAL POPULATION LIVING DOWNSTREAM OF A HYDROELECTRIC DAMLubia Maciel MIRANDA0Larissa Rosa RODRIGUES1João Alberto Farinelli PANTALEÃO2Luciana Segura de ANDRADE3Universidade Federal do Tri-¢ngulo Mineiro, campus Iturama - UFTM-CIT, Grupo de Ensino, Pesquisa e Extensão em Animais Aquáticos - GEPEAAUniversidade Estadual Paulista Júlio de Mesquita Filho - UNESP, Instituto de BiociênciasUniversidade de São Paulo - USP, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto - FFCLRP, Departamento de Biologia, Laboratório de Bioecologia e Sistemática de Crustáceos - LBSCUniversidade Federal do Tri-¢ngulo Mineiro, campus Iturama - UFTM-CIT, Grupo de Ensino, Pesquisa e Extensão em Animais Aquáticos - GEPEAA The migratory behavior of females of the freshwater prawn Macrobrachium amazonicum (Heller, 1862) can indicate a strategy that optimizes the population establishment. With this idea in mind, we evaluated the reproductive biology of M. amazonicum, hypothesizing that females were evenly distributed downstream of Hydroelectric Dam. Specimens were collected monthly for one year, from six sites of Rio Grande river. The specimens were sexed and measured (carapace length; CL). A total of 14,697 adults were captured, 2,864 males (AM), 11,082 non-breeding females (AF) and 751 breeding females (BF). The smallest BF had 3.8 mm CL. The distribution of demographic groups was assessed by a Principal Component Analysis (PCA), which explained 95.16% of the distribution over the collection sites. Breeding females were more abundant in the sites closest to the dam. This result can be explained by rainfall, which varied significantly throughout the year. As the breeding females migrated upstream toward the dam and were more abundant there, our hypothesis of homogeneous distribution was rejected. This behavior probably optimizes larval dispersion. The reproduction was continuous with peaks in the period preceding the maximum rainfall. https://institutodepesca.org/index.php/bip/article/view/1545fishing resources;Amazon River Prawn;carcinology;anthropic impacts;management plan. |
| spellingShingle | Lubia Maciel MIRANDA Larissa Rosa RODRIGUES João Alberto Farinelli PANTALEÃO Luciana Segura de ANDRADE REPRODUCTIVE ASPECTS OF THE PRAWN <i>Macrobrachium amazonicum</i> IN A CONTINENTAL POPULATION LIVING DOWNSTREAM OF A HYDROELECTRIC DAM Boletim do Instituto de Pesca fishing resources; Amazon River Prawn; carcinology; anthropic impacts; management plan. |
| title | REPRODUCTIVE ASPECTS OF THE PRAWN <i>Macrobrachium amazonicum</i> IN A CONTINENTAL POPULATION LIVING DOWNSTREAM OF A HYDROELECTRIC DAM |
| title_full | REPRODUCTIVE ASPECTS OF THE PRAWN <i>Macrobrachium amazonicum</i> IN A CONTINENTAL POPULATION LIVING DOWNSTREAM OF A HYDROELECTRIC DAM |
| title_fullStr | REPRODUCTIVE ASPECTS OF THE PRAWN <i>Macrobrachium amazonicum</i> IN A CONTINENTAL POPULATION LIVING DOWNSTREAM OF A HYDROELECTRIC DAM |
| title_full_unstemmed | REPRODUCTIVE ASPECTS OF THE PRAWN <i>Macrobrachium amazonicum</i> IN A CONTINENTAL POPULATION LIVING DOWNSTREAM OF A HYDROELECTRIC DAM |
| title_short | REPRODUCTIVE ASPECTS OF THE PRAWN <i>Macrobrachium amazonicum</i> IN A CONTINENTAL POPULATION LIVING DOWNSTREAM OF A HYDROELECTRIC DAM |
| title_sort | reproductive aspects of the prawn i macrobrachium amazonicum i in a continental population living downstream of a hydroelectric dam |
| topic | fishing resources; Amazon River Prawn; carcinology; anthropic impacts; management plan. |
| url | https://institutodepesca.org/index.php/bip/article/view/1545 |
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