Estudios adicionales sobre los Crocodylia y Testudinata del Alto Caquetá y Río Caguán Estudios adicionales sobre los Crocodylia y Testudinata del Alto Caquetá y Río Caguán
<p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 12.0pt; font-family: ">Se llevaron a cabo estudios adicionales sobre problemas de reproducción de la babilla...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Universidad Nacional de Colombia
1969-06-01
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| Series: | Caldasia |
| Subjects: | |
| Online Access: | http://www.revistas.unal.edu.co/index.php/cal/article/view/33860 |
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| Summary: | <p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 12.0pt; font-family: ">Se llevaron a cabo estudios adicionales sobre problemas de reproducción de la babilla <em>(Caiman sclerops) </em>y tres especies de tortugas <em>(Podocnemis</em></span><em><span style="font-size: 12.0pt; font-family: "> expansa, Podocnemis unifilis </span></em><span style="font-size: 12.0pt; font-family: ">y <em>Phrynops geoffroanus tuberosus).</em> Los resultados principales son los siguientes:</span><em><span style="font-size: 12.0pt; font-family: "> 1) Caiman sclerops. </span></em><span style="font-size: 12.0pt; font-family: ">Los huevos miden de 67.0 : 41.5 mm. a 73.5 : 41.0 mm. La longitud total de los recién nacidos comprende de 239.5 mm. a 255.5 mm.; pesan entre 32 g, 250 mg. y 47 g.</span><em><span style="font-size: 12.0pt; font-family: "> 2) Podocnemis expansa. </span></em><span style="font-size: 12.0pt; font-family: ">No es nativa del Alto Caquetá, sino ha sido introducida de su curso bajo y del Putumayo en 1940, 1943 y 1955. Actualmente está establecida y se reproduce. Los huevos miden de 44.5 : 36.5 mm, a 48.5 : 45.5 mm., y pesan de 34 g, 350 mg. a 44 g, 300 mg. La Iongitud del Carapax de los recién nacidos varía entre 39.5 mm. y 45.0 mm.; pesan de 17 g, 300 mg. a 20 g.</span><em><span style="font-size: 12.0pt; font-family: "> </span></em></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal; mso-layout-grid-align: none; text-autospace: none;"><em><span style="font-size: 12.0pt; font-family: ">3) Podocnemis unifilis. </span></em><span style="font-size: 12.0pt; font-family: ">Los huevos miden de 41.0 : 28.5 mm. a 51.0 33.5 mm., y pesan entre 15 g. y 31 g.; los recién nacidos de 34.0 a 48.0 mm., pesan de 8 g, 750 mg. a 21 g, 100 mg. Evidentemente, la luz constituye el factor más decisivo en relación con la orientación de la cría recién salida del nido, pero indudablemente existen también otros factores todavía desconocidos. Desarrollan una velocidad considerable para llegar al agua, así, por ejemplo, necesitan unos 25 minutos para recorrer una distancia de 96 metros; no permanecen en las aguas poco profundas cerca de la orilla, sino buscan en seguida las partes hondas donde encuentran mejor protección. En cambio, las babillas recién salidas si permanecen cerca de las orillas, ya que están protegidas por la hembra.</span><em><span style="font-size: 12.0pt; font-family: "> </span></em></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal; mso-layout-grid-align: none; text-autospace: none;"><em><span style="font-size: 12.0pt; font-family: ">4) Phrynops geoffroanus tuberosus. </span></em><span style="font-size: 12.0pt; font-family: ">Los huevos miden entre 32.5 31.5 mm, y 35.0 : 34.0 mm.; pesan de 13 g, 550 mg. a 22 g.; los recién nacidos entre 38.5 mm, y 48.0 mm., .y pesan de 7 g, 700 mg. a 14 g, 750 mg. 5) La Matamata <em>(Chelus fimbriatus ) </em>es, en realidad, nativa en el Alto Caquetá, y no ocasionalmente traída de otros ríos, como se sospechaba</span></p><span style="font-size: 12.0pt; font-family: ">anteriormente.</span><br> <p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 12.0pt; font-family: ";Arial";,";sans-serif";; mso-fareast-language: ES;">Additional studies on reproduction of the Spectacled Caiman (Caiman sclerops), two Side-neck Turtles (Podocnemis expansa, Podocnemis anifilis) and one Snake-neck Turtle (Phrynops geoffroanus tuberosus) have been carried out in the Upper Caquetá and its tributary, río Caguán, which belong to the Colombian Amazon Basin. Moreover, it had been found, that the Matamatá (Chelus fimbriatus] belongs to the native faunistic elements of the Upper Caquetá, and was not introduced from other rivers or its lower course, as formerly suspected. The main results are the following:</span></p> <p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 12.0pt; font-family: ";Arial";,";sans-serif";; mso-fareast-language: ES;">1) Caiman sclerops. Eggs. Measurements: From 67.0 : 41.5 mm. to 73.5 : 41.0 mm, Hatchlings. </span><span style="font-size: 12.0pt; font-family: ";Arial";,";sans-serif";; mso-fareast-language: ES;">Total length: Between 239.5 mm. and 255.5 mm. Weight: From 32 g, 250 mg. to 47 g.</span></p> <p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 12.0pt; font-family: ";Arial";,";sans-serif";; mso-fareast-language: ES;">2) Podocnemis expansa. Originally not native to Upper Caquetá, but introduced as hatchlings from its lower course and río Putumayo in 1940, 1943 and 1955; actually already reproducing. Eggs. Measurements: Between 44.5 : 36.5 mm. and 48.5 : 45.5 mm, Weight: 34 g, 350 mg. and 44 g, 300 mg. Hatchlings. Measurements (Carapace Length) : Between 39.5 mm, and 45.0 mm. Weight: 17 g, 300 mg. and 20 g.</span></p> <p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 12.0pt; font-family: ";Arial";,";sans-serif";; mso-fareast-language: ES;">3) Podocnemis unifilis. Eggs. Measurements: Between 41.0 : 28.5 mm. and 51.0 : 33.5 mm. Weight: 15 g. to 31 g. Hatchlings. Measurements: Between 34.0 mm, and 48.0 mm, Weight: 8 g, 750 mg. to 21 g, 100 mg. The nests are between 180 mm. and 210 mm, deep and contain normally from 14 to 27 eggs; the first hatchlings are found in 80 mm. to 150 mm, depth.<span style="mso-spacerun: yes;"> </span></span></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 12.0pt; font-family: ";Arial";,";sans-serif";; mso-fareast-language: ES;">4) Light seems to be the main factor for the orientation of hatchlings to find their way in direction to the water; they develop a considerable speed, needing only 25 minutes to cover the distance of 96 meters from the nest to the river shore; here they do not remain in shallow water, but rather dive immediately in direction to the depth of rivers and lakes, evidently seeking for better protection against their natural enemies, even fishes, in the muddy and dark waters.</span></p> <p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 12.0pt; font-family: ";Arial";,";sans-serif";; mso-ansi-language: EN-US; mso-fareast-language: ES;" lang="EN-US">5) Phrynops geoffroanus tuberosus. Eggs. Measurements: Between 32.5 : 31.5 mm. and 35.0 : 34.0mm. Weight: 13 g, 550 mg. to 22 g. Hatchlings. Measurements: Between 38.5 mm, and 48.0 mm,</span></p> <span style="font-size: 12.0pt; font-family: ";Arial";,";sans-serif";; mso-fareast-font-family: Calibri; mso-ansi-language: ES; mso-fareast-language: ES; mso-bidi-language: AR-SA;">Weight: 7 g, 700 mg. to 14 g, 750 mg.</span> |
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| ISSN: | 0366-5232 |