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Nombre Archivo:
Hatching rate and larval growth variations in Pseudoplatystoma punctifer.pdf
Formato:
.pdf
Fecha de Publicación:
2015-12-13 11:29:09
Tamaño del Archivo:
314243
Ficha Dublin Core
Titulo:
Hatching rate and larval growth variations in Pseudoplatystoma punctifer : maternal and paternal effects
Autor(es):
Jesus Nuñez;Diana Castro Ruiz;Christian Fernández Méndez;Remi Dugue;Fred Chu;F. Duponchelle;Carmen García;Jean François Renno
Tipo Dublin Core:
Artículo científico
Descripcion:
In Pseudoplatystoma punctifer (e.g. Pseudoplatystoma fasciatum) larvae, parental e¡ects on hatching, growth of initial stages and dry feed adaptation were evaluated as they could in£uence fry heterogeneity, which is responsible for the enhancement of cannibalism, and which remains one of the main factors of mortality during larval stages. A full factorial experiment was carried out with 3 females ! 3 males producing nine families of full siblings, raised separately in triplicates into 30 L tanks at 28 " 0.5 1C in a water recirculating system. Paternal and maternal e¡ects were observed on hatching success, yolk utilization e/ciency and growth until 26 days post fertilization.
Hatching success was generally over 80% except for one male ! female combination (25%). Total length (TL) at hatching and during the ¢rst 4 weeks of exogenous feeding on live Artemia nauplii and dry feeds was determined in each family using digital photographs of larvae and NIH IMAGE J analysis freeware. Mean TL was calculated for each family at each sampling time and analysed using multifactorial analysis of variance tests. These results indicate not only dam but also sire e¡ects at very early developmental stages as well as in subsequent stages of P. punctifer.
Fecha Documento:
2011-12-31
Idioma:
INGLÉS
Palabras Clave:
Pseudoplatystoma punctifer; Pseudoplatystoma fasciatum; Doncella; reproduction; Peru; fish culture; parental effects
