Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - Colombia
ABSTRACT Weakly electric fishes continually emit electric organ discharges (EOD) as a means of communication and localization of objects in their surroundings. Depending on water conductivity, the amplitude of the electric field generated is known to increase with decreases in electrical conductivit...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
2019-10-01
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| Series: | Neotropical Ichthyology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300206&tlng=en |
| _version_ | 1798021399747493888 |
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| author | Carolina Escamilla-Pinilla José Iván Mojica Jorge Molina |
| author_facet | Carolina Escamilla-Pinilla José Iván Mojica Jorge Molina |
| author_sort | Carolina Escamilla-Pinilla |
| collection | DOAJ |
| description | ABSTRACT Weakly electric fishes continually emit electric organ discharges (EOD) as a means of communication and localization of objects in their surroundings. Depending on water conductivity, the amplitude of the electric field generated is known to increase with decreases in electrical conductivity of the water. In Amazonian terra firme streams, water conductivity is extremely low and fluctuates constantly due to local and regional rains. In this context, the space between freely moving weakly electric fishes may be expected to decrease, on average, with an increase in water conductivity. To test this hypothesis, we recorded the positions at rest of the sand-dwelling fish Gymnorhamphichthys rondoni in a terra firme stream for several days in alternating months, over two years. Based on daily nearest neighbor distances among individual fish in a grid, we found a uniform temporal distribution pattern (which was not affected by water conductivity) indicative of site fidelity. Here we highlight the role of other factors that could influence resting site fidelity. |
| first_indexed | 2024-04-11T17:13:13Z |
| format | Article |
| id | doaj.art-fc6a4f29255641f4ac720068ed73d225 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-04-11T17:13:13Z |
| publishDate | 2019-10-01 |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-fc6a4f29255641f4ac720068ed73d2252022-12-22T04:12:51ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02242019-10-0117310.1590/1982-0224-20190006Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - ColombiaCarolina Escamilla-Pinillahttps://orcid.org/0000-0002-4696-4409José Iván Mojicahttps://orcid.org/0000-0002-9179-0962Jorge Molinahttps://orcid.org/0000-0003-3018-6726ABSTRACT Weakly electric fishes continually emit electric organ discharges (EOD) as a means of communication and localization of objects in their surroundings. Depending on water conductivity, the amplitude of the electric field generated is known to increase with decreases in electrical conductivity of the water. In Amazonian terra firme streams, water conductivity is extremely low and fluctuates constantly due to local and regional rains. In this context, the space between freely moving weakly electric fishes may be expected to decrease, on average, with an increase in water conductivity. To test this hypothesis, we recorded the positions at rest of the sand-dwelling fish Gymnorhamphichthys rondoni in a terra firme stream for several days in alternating months, over two years. Based on daily nearest neighbor distances among individual fish in a grid, we found a uniform temporal distribution pattern (which was not affected by water conductivity) indicative of site fidelity. Here we highlight the role of other factors that could influence resting site fidelity.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300206&tlng=enElectrocommunication rangeNearest neighbor distanceSand-dwellingWater conductivityWeakly electric fish |
| spellingShingle | Carolina Escamilla-Pinilla José Iván Mojica Jorge Molina Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - Colombia Neotropical Ichthyology Electrocommunication range Nearest neighbor distance Sand-dwelling Water conductivity Weakly electric fish |
| title | Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - Colombia |
| title_full | Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - Colombia |
| title_fullStr | Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - Colombia |
| title_full_unstemmed | Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - Colombia |
| title_short | Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - Colombia |
| title_sort | spatial and temporal distribution of gymnorhamphichthys rondoni gymnotiformes rhamphichthyidae in a long term study of an amazonian terra firme stream leticia colombia |
| topic | Electrocommunication range Nearest neighbor distance Sand-dwelling Water conductivity Weakly electric fish |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300206&tlng=en |
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