Semen characteristics of the amazonian jundiá (Leiarius marmoratus Gill, 1870)

Rodrigo Diana Navarro,Ivo Pivato

doi:10.14393/bj-v32n6a2016-33749

Abstract

The study evaluated qualitative and quantitative characteristics of Amazonian jundia semen . The experiment was carried out in February 2015 at Cia do Peixe, a company located in Goias state, Brazil, that specialises in fish fry production. Three male L. marmoratus farmed in dugout ponds, weighing 1.34 ± 0.29 kg and measuring 39.33 ± 1.15 cm in length, were tested. The specimens were captured and transferred to a 1000-L tank at the Reproduction Laboratory of the abovementioned company. Water temperature was measured at 7:00 a.m. and 5:00 p.m., and the fish were fed twice daily. For semen collection, the fish were captured from the tank using a dip net and constrained with a wet cotton towel. Their eyes were covered and their urogenital papilla was cleaned and dried with paper towel. Semen was collected in microcentrifuge tubes that were immersed in ice and analysed immediately. On average, the sperm motility rate was 83.33%, motility duration was 5.33 min, sperm concentration was 1,795,833 cells/ mm 3 , and vigour was 4. The morphological analysis of the sperm revealed tail anomalies in 17.66%, midpiece anomalies in 20%, and head anomalies in 5.33%. Based on qualitative and quantitative characteristics, L. marmoratus semen was shown to be suitable for use in artificial reproduction procedures.

Highlights

Knowledge of the biology of a species, especially its reproductive aspects, is essential when you want to perform intensive fish farming (ANDRADE;YASUI, 2003).The study of semen biology in native species is an important tool in aquaculture, as it allows reproduction in artificial conditions, having importance both in the commercial aspect for the development of technological packages for production in captivity and for management and conservation in restocking programs (CAROLSFELD et al, 2003; SILVA et al, 2009; VIVEIROS; GODINHO, 2009; SANCHES et al, 2011).The Amazonian jundiá is a catfish of the order Siluriformes and family Pimelodidae found in the Amazon, Orinoco, and Essequibo Rivers
This study evaluated the qualitative and quantitative characteristics of L. marmoratus semen
Similar results were found in studies on another jundia species, Rhamdia quelen, which exhibited 72.5 to 80% motility in semen samples obtained without hormonal induction (FERREIRA et al, 2001; SOARES et al, 2010)

Summary

INTRODUCTION

Knowledge of the biology of a species, especially its reproductive aspects, is essential when you want to perform intensive fish farming (ANDRADE;YASUI, 2003). The Amazonian jundiá is a fish with potential for aquaculture due to its hardiness, its omnivorous preference, its ability to adapt well in intensive systems, and its white meat that is well accepted in the market. This species has an important role in aquaculture, Because the Amazonian jundai is widely used for hybridization in the northern, northeastern and mid-western regions of Brazil (CRUZCASALLAS et al 2011; MIRA LOPES, 2010).

MATERIAL AND METHODS

RESULTS

DISCUSSION

Findings

CONCLUSION