Índice gonadosomático en hembras de Gymnotus omarorum y su vinculación con la reproducción en cautiverio

LÓPEZ, P.A.; SÁNCHEZ, S.; GIMÉNEZ, H.; BARRIOS, C.; VIGLIANO, F.A.

Corrientes

Simposio; V Simposio Argentino de Ictiología; 2017

Instituto de Ictiología del Nordeste

Se midió la relación gonado<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>omática (RGS) de hembra<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de G. omarorum para vincularla con la ocurrencia de diferente<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> cohorte<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> en e<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>tanque<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>. Se analizaron 27 reproductore<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>ilve<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>tre<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de G. omarorum, alojado<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> en 4 pileta<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de fibra de vidrio (2 por grupo) de 6 m2 y 0,5 m de profundidad provi<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>to<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> con trozo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de caño de PVC para e<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>condite, vegetación flotante y cubierto<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> con media<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>ombra. Un grupo permaneció de<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>de <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>u captura al aire libre (G1), otro e<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>tuvo alojado previamente 30 día<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> en laboratorio (G2). 6 ejemplare<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de G1 y 7 de G2 fueron <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>acrificado<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> 30 día<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>pué<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de permanecer en idéntica<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> condicione<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> y lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> 14 re<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>tante<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> al finalizar la experiencia. Se calculó la RGS de la<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> hembra<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>. Tran<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>currido<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> 50 día<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de cautiverio <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>e efectuó una pe<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>ca con zaranda confeccionada con malla de media<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>ombra. Lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> e<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>tanque<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> fueron co<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>echado<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> pa<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>ado<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> 64 día<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>.La<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> RGS obtenida<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> a lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> 30 día<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> arrojaron valore<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> entre 2,54 y 5,2 en G1 y 4,9 a 8,6 en G2. A lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> 50 día<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>e pudo verificar la pre<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>encia de juvenile<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> en lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> e<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>tanque<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>, <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>e realizó la biometría de lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> mi<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>mo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> y <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>e <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>acrificaron lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> reproductore<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>. Lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> juvenile<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> corre<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>pondiente<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> a G2 pre<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>entaron una di<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>tribución de talla<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> trimodal, que corre<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>pondería a tre<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> evento<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> reproductivo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>, alcanzando talla<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> media<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de 63, 70 y 80mm. Por <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>u parte, en G1 también <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>e ob<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>ervó una di<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>tribución <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>imilar, con talla<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> media<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de 15, 38 y 58mm. A lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> 64 día<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> la<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> RGS di<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>minuyeron, arrojando rango<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de 0,5-4,40 para G1 y 2,62-6,82 para G2, lo que <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>e condice con la ocurrencia de evento<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> reproductivo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> a<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>incrónico<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>, entre y dentro de lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> grupo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>. E<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>ta<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> ob<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>ervacione<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> <<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>ugieren que la<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> hembra<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> de cada grupo con mayor RGS habrían participado en lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> evento<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> reproductivo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> má<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> antiguo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> y aquella<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> que pre<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>entan valore<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> menore<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>, en lo<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> má<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan> reciente<<span class="keyword">sspan>pan cla<span class="keyword">sspan><span class="keyword">sspan>="keyword"><span class="keyword">sspan>span class="keyword">sspan>pan>.