2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2019 | 11:30 AM - 11:45 AM | METABOLIC RESPONSES TO LONG-TERM FOOD DEPRIVATION IN SUBTERRANEAN AND SURFACE AMPHIPODS | 250 DE
METABOLIC RESPONSES TO LONG-TERM FOOD DEPRIVATION IN SUBTERRANEAN AND SURFACE AMPHIPODS
A long-standing hypothesis in subterranean biology posits that organisms living in resource poor subsurface habitats can withstand long periods of resource shortages due to reduced metabolic rate (RMR) when compared to their epigean counterparts. However, previous studies have proposed that caves with ample energy resources may not evolve organisms with RMR. The equivocal nature of previous findings suggests that there is still a need to systematically compare starvation responses of subterranean and surface species in order to elucidate whether there are widespread adaptations to low energy systems in subterranean taxa. The purpose of the study was to examine the effects of food deprivation in closely related subterranean- and surface- macroinvertebrates (amphipods), Stygobromus pecki and Synurella sp, from the adjacent Edwards and Carrizo-Wilcox Aquifers in Texas, USA. S. pecki and Synurella sp, were food deprived for a pre-determined time interval and changes in whole-body metabolites were measured throughout food deprivation experiments. Our results indicated that under fasting conditions, S. pecki, utilized metabolic reserves at much lower rates when compared to Synurella sp. Thus, it appears that S. pecki have evolved more efficient metabolic adaptations to survive prolonged periods of food deprivation.
- Metabolism
- Groundwater
- Life History
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Presenters/Authors
Parvathi Nair
(), Texas State University, p_n22@txstate.edu;
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Mar Huertas
(), Texas State University, mhuertas@txstate.edu;
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Weston Nowlin
(), Texas State University, wnowlin@txstate.edu;
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