Abstract
The domestication and culture of freshwater shrimp native of tropical and subtropical American Pacific zone requires the study and development of technologies in open systems where their response to types of farming, feeding and management strategies generate practical information for the production of this species. The aim of this study was to evaluate the effect of stocking density on growth and survival in M. americanum juvenile-adult, cage-cultured and to determine the optimal density for grow-out production. The caridean shrimp Macrobrachium americanum was cultured for 152 days in a 16 cage-culture (3 m3 each) at densities of 1, 3, 6 and 9 org / m3, respectively, with stocking sizes from 12.1 ± 1.7 to 13.5 ± 2.3 g. The prawns were fed twice daily with Camaronina 35%. Water quality parameters were within standard range for caridean shrimp culture. There was a significant effect of density on final weight, growth rate, specific growth rate, K condition and survival, and an inversely proportional relationship with the feed conversion ratio. The growth was affected by density, resulting to a maximum increase of 6 org / m3 in the asymmetry of the prawn and also increasing the number of small organisms by 9 org / m3. However, it is necessary to study such aspects as the rate and frequency of feeding, the initial size-grade and the implementation of shelter, among others.
Highlights
Problems associated with the deterioration of the environmental conditions of the hydrological basins in Latin America have raised concerns to implement systems for aquaculture production of native populations of prawns
The aim of this study was to evaluate the effect of stocking density on growth and survival in M. americanum juvenile-adult, cage-cultured and to determine the optimal density for grow-out production
The caridean shrimp Macrobrachium americanum was cultured for 152 days in a 16 cage-culture (3 m3 each) at densities of 1, 3, 6 and 9 org/m3, respectively, with stocking sizes from 12.1 ± 1.7 to 13.5 ± 2.3 g
Summary
Problems associated with the deterioration of the environmental conditions of the hydrological basins in Latin America have raised concerns to implement systems for aquaculture production of native populations of prawns. Among the species with gradual decline and more aquaculture potential is Macrobrachium americanum (Ponce-Palafox et al, 2002; Anger, 2013) among others. These species have the conditions of the key species in the lentic ecosystems, their size, and adaptation to aquaculture production systems, price, and their market demand. Reproduction, physiology, biochemistry and growth aspects for caridean shrimp M. americanum have been conducted (Ponce-Palafox et al, 2014). There are few studies on biotechnological aspects of growth in early juveniles (Mendez-Martinez et al, 2017) and late juvenile-adults (Ponce-Palafox et al, 2014). The generation of technology aspect for the culture of M. americanum juveniles, sub-adults and adults is essential for its growth and survival in commercial semiintensive and intensive farming systems
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