External morphological stages and protein variations along with the embryonic development of the longarm river prawn Macrobrachium tenellum (Smith, 1871)

Abstract

A good understanding of a given species' embryology is important to settle the larval rearing bases when juveniles are required for culture purposes or conservation programs. Changes in embryonic morphology, protein concentration, and protein type occurring in prawn eggs were analyzed in the present work. Berried females of Macrobrachium tenellum were collected in the Colotepec River, Oaxaca, Mexico. The eggs were taken from the ovigerous mass and embryonic stages classified by their color. Morphological changes in the embryos allowed identifying six embryonic stages based on color, egg size, and morphological features. Determinations of the protein extract were executed in SDS-PAGE (electrophoresis in polyacrylamide gels) and, subsequently, proteomic analyses were also performed. Protein bands along embryonic development and their molecular weights are presented and commented.

Yolk resorption and larval development in the brackish river prawn Macrobrachium macrobrachion under laboratory conditions: Perspectives for aquaculture

“…A comparison of the features of M. macrobrachion larvae to other species in the literature is currently difficult because studies on the use of yolk reserves in the Macrobrachium genus have mostly been conducted at the embryonic level (García et al, 2008; García‐Guerrero et al, 2021; Walker et al, 2006). However, these two phases of ontogenetic development do not occur in a similar manner and under the same conditions in the species of Macrobrachium genus.…”

“…Some prawn species are prone to massive mortalities at the start of exogenous feeding during the nonlecithotrophic period (Kailasam et al, 2007; Lal et al, 2014). Studies on the use of yolk reserves in Macrobrachium prawn have mainly been conducted at the embryonic level (García et al, 2008; García‐Guerrero et al, 2021). There have been relatively few studies on the larval stage, despite the fact that these two phases of ontogenetic development do not occur in similar ways and under the same conditions in Macrobrachium species.…”