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Bibliographic Details
Main Author:	Nemorio García Barrera
Format:	Artículo científico
Language:	es
Published:	Universidad Nacional Autónoma de México 2007
Subjects:	Multidisciplinaria (Ciencias Naturales y Exactas) QUISTES DENSIDAD CRECIMIENTO STREPTOCEPHALUS MACKINI
Online Access:	https://www.redalyc.org/articulo.oa?id=42338408
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Efectos de la densidad de cultivo sobre la edad de reproducción y producción de quistes del camarón Duende Streptocephalus mackini Nemorio García Barrera Martha Patricia Hernández Vergara Carlos Iván Pérez Rostro Multidisciplinaria (Ciencias Naturales y Exactas) QUISTES DENSIDAD CRECIMIENTO STREPTOCEPHALUS MACKINI Durante el estudio se cultivaron nauplios del camarón duende (Streptocephalus mackini) en tres peceras con 200L de agua dulce, a densidad de 100 org.L1, recambios de agua de 25% diarios, y condiciones semicontroladas detemperatura (27 ± 3°C), pH 7-8.5, fotoperiodo (12 L: 12 O), oxígeno disuelto a saturación, y alimentación a base demicroalga Chorella sp (1 × 106 cel. mL1), para evaluar la velocidad de crecimiento y establecer su ecuación. Posteriormentese determinó el efecto de la densidad de cultivo en la edad reproductiva y producción de quistes depreadultos del camarón (1:1 macho: hembra) durante 21 días. Se probaron cuatro tratamientos con tres réplicas:T1-50 org. L1, T2-100 org. L-1, T3-150 org. L1 y T4-200 org. L1, en 12 recipientes de 3 L de capacidad y condicionesambientales semicontroladas. Los organismos iniciaron su etapa reproductiva, en promedio, a los diez días de sunacimiento, y continuó hasta el fi nal del ensayo. Se encontró que la longitud teórica máxima bajo las condicionesprevalecientes fue de 26.49 mm, el valor de la constante de catabolismo fue de 0.034 mm y la talla al tiempo denacer de 0.896 mm. Los resultados indican que la densidad afectó directamente la producción de quistes y supervivencia.Las hembras que permanecieron en T1 produjeron un número signifi cativamente superior de quistes (178.01quistes/hembra) con respecto a los tratamientos restantes (α = 0.05). La supervivencia de los organismos en T1 yT2 (74.76% y 71.33%) indican que la producción masiva de la especie puede ser económicamente factible, bajo lascondiciones que se probaron. 2007 artículo científico 0301-5092 https://www.redalyc.org/articulo.oa?id=42338408 es http://www.redalyc.org/revista.oa?id=423 Veterinaria México application/pdf Universidad Nacional Autónoma de México Veterinaria México (México) Num.4 Vol.38

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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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