Energy reserves mobilization: Strategies of three decapod species

SACRISTÁN HERNÁN JAVIER; RODRIGUEZ YAMILA ELIANA; PEREIRA, NAIR DE LOS ANGELES; SUSANA LÓPEZ GRECO ; LOVRICH GUSTAVO ALEJANDRO ; FERNÁNDEZ GIMENEZ ANALIA VERÓNICA; SACRISTÁN HERNÁN JAVIER; RODRIGUEZ YAMILA ELIANA; PEREIRA, NAIR DE LOS ANGELES; SUSANA LÓPEZ GRECO ; LOVRICH GUSTAVO ALEJANDRO ; FERNÁNDEZ GIMENEZ ANALIA VERÓNICA

PLOS ONE

PUBLIC LIBRARY SCIENCE

Lugar: San Francisco; Año: 2017

1932-6203

In food deprivation assays, several different responses have been observed in crustaceans.However, studying energy reserves utilization among more than one species during thesame starvation period has not yet been performed, particularly to discern whether theresponses are due to intrinsic and/or environmental factors. We hypothesize that decapodspecies with similar feeding habits have the same strategies in the use of energetic reservesduring starvation, even though they inhabit different environments. The aim of this studywas to compare the energy reserves mobilization of three decapods species (Cherax quadricarinatus,Palaemon argentinus and Munida gregaria) with similar feeding habits, exposedto similar food deprivation conditions. The crayfish, shrimp and squat-lobster were experimentallykept at continuous feeding or continuous starvation throughout 15 days. Every 3rdday, the midgut gland index (MGI), and the glycogen, lipid and protein contents were measuredin the midgut gland (MG) and pleon muscle. Palaemon argentinus mobilized morereserves during starvation, followed by C. quadricarinatus, and the last M. gregaria. Thestarved shrimps presented low MGI, whereas MG showed a reduction in glycogen (fromday 6 to 15), lipid (from day 3 to 15), and protein levels (at day 9 and 15) while in their muscle,lipid reserves decreased at days 3 and 6. In C. quadricarinatus, the most affectedparameters in the MG were MGI, glycogen (from day 6 to 15), and lipids (at day 12 and 15).In the MG of M. gregaria only the glycogen was reduced during fasting from 3 to 15 days.Even though the three studied species have similar feeding habitats, we found that theirenergetic profile utilization is different and it could be explained by the habitat, life span, temperature,organ/tissue, and metabolism of the species. Our results may be useful to understandthe several different responses of crustaceans during starvation.