Diets for Macrobrachium acanthurus breeders: Sperm evaluation

Tiago Viana Da Costa,Laura Suzana López-Greco,Lidia Miyako Yoshii Oshiro,Emanuela Paula Melo,Helaine Dos Reis Flor

doi:10.1590/1809-6891v21e-60022

Abstract

Abstract The application of biotechnology in animal reproduction has enabled the production of young forms in both quantity and quality. Increasing the number of viable gametes produced by reproducers, among other factors, through an ideal diet, can ensure higher production. Therefore, the aim of this study was to determine the influence of three diets on the sperm survival of Macrobrachium acanthurus. To this end, 24 M. acanthurus males were used, distributed randomly and equally among treatments. Their diets were composed of 100% fresh food (fish and squid muscle - 14% protein), 100% dry feed (commercial feed - 50% protein) and a mixture of these diets containing 30% protein. Spermatophores were extracted through electrical stimulation every 15 days, and the controls consisted of spermatophores obtained directly from nature. No significant difference between diets was observed comparing shrimp and spermatophore weights. The 100% fresh diet provided the best sperm survival performance.

Highlights

Macrobrachium acanthurus is a freshwater shrimp native to Brazil and found throughout the American continent and the West Indies, exhibiting high cultivation potential and considered economically important, especially for the human populations that manually exploit this species[1,2,3,4].Investments in shrimp production, management, nutrition, reproduction and, more recently, genetic improvements, have become necessary for shrimp cultivation development
Regarding shrimp weight and spermatophore weight, no significant difference between treatments during the different collections was noted, shrimp weight fed with the commercial feed and fresh food mixture became higher with each extraction
Treatment T2 exhibited the best result, with an average of 80.1%, no significant difference compared to treatments resulted in 6.1% (T1) was noted (Table 2)

Summary

Introduction

Macrobrachium acanthurus is a freshwater shrimp native to Brazil and found throughout the American continent and the West Indies, exhibiting high cultivation potential and considered economically important, especially for the human populations that manually exploit this species[1,2,3,4]. Investments in shrimp production, management, nutrition, reproduction and, more recently, genetic improvements, have become necessary for shrimp cultivation development. Maintaining shrimp with low reproductive quality implies in high costs for aquaculture farmers. According to Browdy[6], Meumpol et al[7] and Shailender et al[8], shrimp breeder diet and quality directly interfere in gamete production, and are, responsible for adequate larvae quality and paramount for culture success. Nutritional shrimp reproduction effects have been assessed mainly in females. Males may contribute to the limited success of certain native species in captive breeding activities[9,10,11,12,13]

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Conclusion