Spermatophore quality of the pink shrimp Farfantepenaeus paulensis (Decapoda, Dendrobranchiata) broodstock fed with different maturation diets

Abstract

The objective of the present work was to evaluate the effects of different diets on spermatophore quality and tissue biochemical composition in male pink shrimp Farfantepenaeus paulensis. The experiment was carried out with the three following treatments: fresh food, commercial diet and a mix of fresh food and commercial diet. Spermatophore quality was evaluated by spermatophore weight, sperm count, melanization and spermatophore absence rates. Biochemical analyses of glucose, triacylglycerides and protein were completed for hemolymph, hepatopancreas and muscle. Spermatophore weight and sperm count were not significantly different among treatments (PN0.05). At the end of the experiment, shrimp fed only with commercial diet showed highest melanization rate and spermatophore absence, 42.85% and 42.85%, respectively. To shrimp fed only with fresh food the values melanization and spermatophore absence were 15.38% and 0%, respectively and the mix 12.51% and 37.50%, respectively. Hemolymph glucose concentration was significantly higher in commercial diet treatment (31.19 mg/dL) than fresh food (12.24 mg/dL) and mix treatments (10.97 mg/dL). Farfantepenaeus paulensis broodstocks fed only the commercial diet may present decrease spermatophore quality.