The daily cycle of siphon extension behavior in the Manila clam controlled by endogenous rhythm

Houki, Shouji; Kawamura, Tomohiko; Irie, Takahiro; Won, Nam‐Il; Watanabe, Yoshirô

doi:10.1007/s12562-015-0859-6

Cited by 6 publications

(3 citation statements)

References 24 publications

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“…When juvenile clams settle in muddy and sandy sediments of the intertidal zone and live buried a few centimeter deep 34 , they experience daily rhythms of air exposure throughout their lives, leading to physiological stresses caused by water loss, oxygen deficiency, thermal stress, and food limitation 1 13 14 . Both field and laboratory observations reveal the gaping behavior of Manila clams when they are in immersion 15 34 35 , which is associated with siphon extension behavior and is considered to be related with the feeding 34 35 . However, when Manila clams are under hypoxia (e.g.…”

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confidence: 99%

Physiological performance of the intertidal Manila clam (Ruditapes philippinarum) to long-term daily rhythms of air exposure

Yin

Chen

Hai

et al. 2017

Sci Rep

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Intertidal organisms, especially the sessile species, often experience long-term periodic air exposure during their lives. Learning the biochemical and physiological responses of intertidal organisms to long-term periodic air exposure and the relationship to duration of air exposure provides insight into adaptation to this variably stressful environment. We studied the Manila clam, Ruditapes philippinarum, an important species in world aquaculture, as a model to evaluate survival, growth, lipid composition, oxygen consumption, oxidative damage, and antioxidant enzyme activity in relation to the duration of air exposure in a long-term (60 days) laboratory study of varying durations of periodic emersion and re-immersion. Our results show: (1) clams undergoing a longer period of air exposure had lower survival and growth compared to those given a shorter exposure, (2) levels of oxidative damage and activities of antioxidant enzymes were higher in all air exposure treatments, but did not increase with duration of air exposure, and (3) the content of docosahexaenoic acid increased with duration of air exposure. Our results can largely be interpreted in the context of the energy expenditure by the clams caused by aerobic metabolism during the daily cycle of emersion and re-immersion and the roles of docosahexaenoic acid against oxidative stress.

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confidence: 99%

Physiological performance of the intertidal Manila clam (Ruditapes philippinarum) to long-term daily rhythms of air exposure

Yin

Chen

Hai

et al. 2017

Sci Rep

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“…The feeding cycle of Anodonta anatina was found to cover 36 h, during which they keep their shells open for 20 h to filter food in the presence of algae, before closing the shells and then resting for 16 h (Hartmann et al, 2016). The feeding behaviors of Ruditapes philippinarum and Mytilus edulis are also characterized by circadian rhythms: they both open their shells at night to actively take in food over a cycle of 24 h (Robson et al, 2010;Houki et al, 2015). The diel feeding patterns of Laternula marilina and Meretrix meretrix can be divided into three stages: a high feeding proportion stage from 00:00 to 08:00, a low feeding proportion stage from 12:00 to 20:00, and another stage that varies between low and high feeding proportions (Zhuang, 2005(Zhuang, , 2006.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of the Feeding Characteristics and Digestion Physiology of Haliotis discus hannai and Haliotis gigantea

et al. 2021

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Abalone (Haliotis spp.) are typical nocturnal creatures but Haliotis discus hannai is bold and active in the nighttime whereas H. gigantea tends to be timid and inactive. In this study, we quantified and compared differences in movement, feeding, and digestive physiology between H. discus hannai and H. gigantea as well as the potential molecular mechanisms on the basis of video observations and expression levels of genes related to feeding regulation. The feeding behaviors of both species were characterized by significant circadian rhythms (P < 0.05). However, the distance moved and the cumulative duration of movement were 2.61 and 1.94 times higher, respectively, in H. discus hannai than in H. gigantea over the 24-h cycle. The cumulative duration of feeding by H. discus hannai was only 1.15 times that by H. gigantea, but the feeding time as a percentage of the cumulative duration of movement (FTP) was up to 94.6% for H. gigantea and only 56.0% for H. discus hannai. The peaks for α-amylase activity and NPF expression levels in both species as well as the peak OX2R expression level in H. gigantea occurred during 20:00–00:00 h. By contrast, the peaks for alginate lyase activity and NPYR expression levels in H. discus hannai occurred at 16:00 h, when the FTP was significantly higher for H. discus hannai than for H. gigantea. These initial findings quantify specific behavior parameters and thus provide a reference for the selection of appropriate feeding strategies and the proliferation of abalone via bottom sowing.

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“…Rhythmic biological processes, producing diverse physiological and behavioural outputs over a wide range of temporal and spatial scales, are essential to marine ecosystems (Tessmar-Raible et al, 2011). Common examples include rhythmic locomotor activity (Newcomb et al, 2014), oxygen consumption (Kim et al, 1999), feeding (Houki et al, 2015), reproduction (Wayne, 2001), cell renewal (Zaldibar et al, 2004), nerve impulses (Jacklet, 1969) and gene expression (Connor & Gracey, 2011). Endogenous biological rhythms are underpinned by a circadian clock mechanism operating on a sub-cellular level.…”

Section: Introductionmentioning

confidence: 99%

Influence of light and temperature cycles on the expression of circadian clock genes in the mussel Mytilus edulis

Chapman

Bonsor

Parsons

et al. 2020

Marine Environmental Research

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Clock genes and environmental cues regulate essential biological rhythms. The blue mussel, Mytilus edulis, is an ecologically and economically important intertidal bivalve undergoing seasonal reproductive rhythms. We previously identified seasonal expression differences in M. edulis clock genes. Herein, the effects of light/dark cycles, constant darkness, and daily temperature cycles on the circadian expression patterns of such genes are characterised. Clock genes Clk, Cry1, ROR/HR3, Per and Rev-erb/NR1D1, and Timeout-like, show significant mRNA expression variation, persisting in darkness indicating endogenous control. Rhythmic expression was apparent under diurnal temperature cycles in darkness for all except Reverb. Temperature cycles induced a significant expression difference in the non-circadian clock-associated gene aaNAT. Furthermore, Suppression Subtractive Hybridisation (SSH) was used to identify seasonal genes with potential links to molecular clock function revealed numerous genes meriting further investigation. Understanding the relationship between environmental cues and molecular clocks is crucial in predicting the outcomes of environmental change on fundamental rhythmic processes.

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The daily cycle of siphon extension behavior in the Manila clam controlled by endogenous rhythm

Cited by 6 publications

References 24 publications

Physiological performance of the intertidal Manila clam (Ruditapes philippinarum) to long-term daily rhythms of air exposure

Physiological performance of the intertidal Manila clam (Ruditapes philippinarum) to long-term daily rhythms of air exposure

Comparative Study of the Feeding Characteristics and Digestion Physiology of Haliotis discus hannai and Haliotis gigantea

Influence of light and temperature cycles on the expression of circadian clock genes in the mussel Mytilus edulis

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