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1. Verfasser:	Fernando Perea-Ganchou
Format:	Artículo científico
Sprache:	es
Veröffentlicht:	Universidad del Zulia 2017
Schlagworte:	Veterinaria trópico tilapias género Oreochromis Comportamiento reproductivo
Online-Zugang:	https://www.redalyc.org/articulo.oa?id=95951040003 https://www.redalyc.org/journal/959/95951040003/ https://www.redalyc.org/journal/959/95951040003/html/ https://www.redalyc.org/journal/959/95951040003/95951040003.epub https://www.redalyc.org/journal/959/95951040003/movil
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FACTORES QUE AFECTAN EL DESEMPEÑO REPRODUCTIVO DE TILAPIAS DEL GENERO Oreochromis EN LA ZONA BAJA DEL ESTADO TRUJILLO, VENEZUELA Fernando Perea-Ganchou Daniel Antonio Perdomo-Carrillo Zenaida Corredor-Zambrano Rosalba Moreno-Torres Maryuri Pereira-Morales Mario González-Estopiñán Veterinaria trópico tilapias género Oreochromis Comportamiento reproductivo La inÀuencia del año, de la época, del mes, de la variedad genética y de la relación hembra macho sobre el desempeño reproductivo de un plantel de tilapias del género Oreochromis , propiedad de una unidad de producción piscícola ubicada en el municipio Andrés Bello del estado Trujillo, Venezuela. Se consideró como variable respuesta el porcentaje de hembras de tilapia reproductivamente activas o grávidas (con huevos o larvas en el interior de la boca). Los datos se analizaron mediante la regresión logística del paquete estadístico SAS. El porcentaje de hembras grávidas fue mayor (P<0,01) en el primer año de estudio (25,5%) que en el segundo (13,9%). La época afectó el comportamiento reproductivo, que fue superior (P<0,01) en la época 1 (24,4%) que en la 2 (15,0%) y 3 (12,7%). Asimismo, las tilapias grises ( Oreochromis niloticus ) fueron reproductivamente más activas que las rojas ( Oreochromis spp) (21,5 versus 17,1%, respectivamente; P<0,01). La relación hembra-macho fue estadísticamente similar entre las tres categorías analizadas (17,1; 19,6 y 16,9% para la relaciones hembra-macho ≤ 1,5:1, > 1,5:1 ≤ 2,0:1 y > 2,0:1, respectivamente). Durante el año ocurrieron dos picos de actividad reproductiva, uno de mayor magnitud durante los primeros 4 meses del año y otro marcadamente menor entre julio y septiembre. En conclusión, irrespectivamente de la relación entre sexos, en las condiciones ambientales y de producción del plantel de reproductores de tilapia estudiado, las hembras se reprodujeron con mayor intensidad durante el periodo de sequía. Asimismo, fueron reproductivamente más activas las hembras de la variea Oreochromis niloticus e e la Oreochromis spp. 2017 artículo científico 0798-2259 https://www.redalyc.org/articulo.oa?id=95951040003 https://www.redalyc.org/journal/959/95951040003/ https://www.redalyc.org/journal/959/95951040003/html/ https://www.redalyc.org/journal/959/95951040003/95951040003.epub https://www.redalyc.org/journal/959/95951040003/movil es http://www.redalyc.org/revista.oa?id=959 Revista Científica application/pdf Universidad del Zulia Revista Científica (República Bolivariana de Venezuela) Num.2 Vol.XXVII

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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