Edad y crecimiento del híbrido de tilapia Oreochromis niloticus x Oreochromis aureus (Perciformes: Cichlidae) en la represa ?Zimapán? Hidalgo, México

Abstract

Age and growth of the hybrid tilapia Oreochromis niloticus x Oreochromis aureus (Perciformes: Cichlidae) in the dam "Zimapan" Mexico. Studies on age and growth in fishes are essential to establish models on population dynamics. The previos issues were determined in this study by scale growth analyses. Between September 2003 and May 2004, 382 organisms were captured using gill and atarraya nets. Eight samples were developed every month a long this study. Standard length in centimeters (L e), total weight in grams (P t), scale length in centimeters (L esc) and growth rings were determined. The size and weight ranged from 38 to 232mm (L e) and 8.7 to 311.9g (P t), respectively. The growth rings analyses reveal four age groups, being the second group the most representative with 34.3% of the total sampled. The scale ring analyses showed two growth rings, one develops between November-January and the other between April-May, in good correlation with low temperature and gonad development, respectively. The growth parameters were established as: L =281.1mm, W =877.1g, K=0.33 and T 0 =0.88year-1. The growth curves based on length and weight were described by using the von Bertalanffy model: L e =28.11[1-e-0.33(t+0.88) ] and P t =877.17[1-e-0.33(t+0.88) ] 3. Finally, it is concluded that commercial catches in this dam are between a year and year and half-old when exploited. Rev. Biol. Trop. 59 (2): 761-770. Epub 2011 June 01.

Allometric relationship and growth models of juveniles of Cichlasoma festae (Perciforme: Cichlidae), a freshwater species native in Ecuador

“…Similar results were published by Kullander (2003) for Cichlidae, where the estimation of b was found between 2.93 and 3.33, and the intercept a was found between 0.00576 and 0.0602. In a similar study by Gómez-Ponce et al (2011) for Oreochromis niloticus in Mexico, allometric coefficients ranged between 2.5 and 3.5 were shown, giving credence to the results of this study. Barreto et al (2011) have studied the fish growth by making captures during different growth stages; they have classified the fishes and later have adjusted the recorded measures to a biologic function of Von Bertalanffy.…”

“…The average daily growth of juveniles of C. festae was lower than those reported for Tilapia nilotica (0.49 day -1 ) (Gómez-Ponce et al, 2011). At the beginning of the study, variability lower than 3 % was found in both weight and length, similar to Dicentrarchus labrax results of Saillant et al (2003).…”

“…Studies on Tilapia growth in Mexico obtained 56.83 for L ∞ and 0.13 for k (Palacios, 1995). Likewise, Gómez-Ponce et al (2011) obtained higher values of L ∞ and k (L ∞ = 28.11 cm; k = 0.33 week -1 ) for Tilapia. However, no C. festae data were available.…”

Explotación y evaluación de la pesquería de tilapia ( Oreochromis spp.) En el embalse “Zimapám” Fernando Hiriart Balderrama, Hidalgo, México

“…To the best of our knowledge, no other studies about tilapia exploitation have been conducted in the states of Hidalgo and Queretaro. The only reports available discuss water quality in the Zimapán Reservoir (Hernández-Montaño & Orbe, 2002;López-Hernández et al 2007;Gómez-Ponce et al 2011). In the present study, tilapia fishing is evaluated from 1997 to 2006, being the first research conducted in the reservoir.…”

Comparación de tres métodos indirectos para estimar el crecimiento de la tilapia <i>Oreochromis aureus</i> (Perciformes: Cichlidae) en un lago tropical de México

“…Para estimar el crecimiento de tilapia se han realizado diversos estudios (Bernal 1984, Ramírez 2007, Beltrán-Álvarez et al 2010, Gómez-Ponce et al 2011, algunos de ellos se han basado en métodos indirectos (Ramos-Cruz 1995, Jiménez-Badillo 2006, Hernández-Montaño 2006, Gómez-Márquez et al 2008, Peña-Messina et al 2010. Sin embargo, en la mayoría de los estudios previos no se han realizado estimaciones alternativas por más de un método, ni tampoco se ha cuantificado la incertidumbre asociada a dichas estimaciones.…”