Tide-related biological rhythm in the oxygen consumption rate of ghost shrimp (Neotrypaea uncinata Milne Edwards)

Abstract

The effects of tidal height (high and low), acclimation to laboratory conditions (days in captivity) and oxygen level (hypoxia and normoxia) were evaluated in the oxygen consumption rate (OCR) of the ghost shrimp Neotrypaea uncinata. We evaluated the hypothesis that N. uncinata reduces its OCR during low tide and increases it during high tide, regardless of oxygen level or acclimation. Additionally, the existence of an endogenous rhythm in OCR was explored, and we examined whether it synchronized with tidal, diurnal or semidiurnal cycles. Unexpectedly, high OCRs were observed at low tide, during normoxia, in non-acclimated animals. Results from a second, longer experiment under normoxic conditions suggested the presence of a tide-related metabolic rhythm, a response pattern not yet demonstrated for a burrowing decapod. Although rhythms persisted for only 2 days after capture, their period of 12.8 h closely matched the semidiurnal tidal cycle that ghost shrimp confront inside their burrows.

Fluctuating seawater pH/pCO2regimes are more energetically expensive than static pH/pCO2levels in the musselMytilus edulis

“…Other studies have shown food availability can influence individuals' OA response because of these changes in metabolic cost [ 9 ] and that increased food, when available, can provide the additional energy required. Our findings align with recent work on the influence of tidal biological rhythms on metabolic rates of the ghost shrimp, Neotrypaea uncinata , where metabolic rates were higher under simulated fluctuating tidal conditions compared with static conditions in the laboratory [ 42 ]. The difference in metabolic rate between static and fluctuating OA conditions may partly be explained via changes in energy demand associated with intracellular acid–base regulation.…”

Differences in the respiratory response to temperature and hypoxia across four life-stages of the intertidal porcelain crab Petrolisthes laevigatus

“…While studies that aim to evaluate the effects of environmental stressors (like temperature and oxygen tension) on the metabolic rate of crustaceans are common (e.g. Grieshaber et al 1993 ; Burnett and Stickle 2001 ; Paschke et al 2010 ; Leiva et al 2015 , 2016 ), only a few studies have evaluated whether these effects are differentially expressed for large and small bodied species (i.e. whether environmental variables modify the mass exponent).…”

“…In contrast, we obtained all life-stages from the field and maintained them for a short time in the laboratory. This suggests that environmental history may be important in shaping physiological performance to short-term exposures (Castillo and Helmuth 2005 ; Leiva et al 2016 ). Future experiments should account for this initial variability.…”

Are cyclic plant and animal behaviours driven by gravimetric mechanical forces?

“…Rhythmic activity in the breeding of insects was also reported ( Bruce and Pittendrigh, 1957 ), presenting a period of ~24.5h, close to the length of the circatidal day. Similar tide-like cycles are evident in the water distribution inside roots ( Takase, 2011 ), in the respiration of shrimps ( Leiva, 2016 ), in the metabolism of seedlings ( Ievinsh and Kreicbergs, 1992 ), in the growth of moss ( Mironov et al , 2020 ), in bipolar mood cycles and sleep in humans ( Cajochen et al , 2013 ; Wehr, 2018 ), and in the activity of luminescent fungi ( Oliveira et al , 2015 ), to cite some of the numerous well-documented cases ( Lüttge, 2003 ; Kuhlman et al , 2007 ).…”