Emergence Rhythms of Subtidal Small Invertebrates in the Subtropical Sea: Nocturnal Patterns and Variety in the Synchrony with Tidal and Lunar Cycles

Saigusa, Masahiro; Oishi, Kazushi

doi:10.2108/zsj.17.241

Cited by 22 publications

(4 citation statements)

References 26 publications

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“…Further evidence from Saigusa (1992), working with the semi-terrestrial crab Sesarma pictum, showed that the tidal timing of larval release was entrained by a LD cycle, and when the photoperiod was advanced or delayed, the tidal larval release rhythm was shifted accordingly. Thus, an argument has been made (Saigusa & Oishi, 2000) that the observed tidal rhythm is only a variation of the day/night rhythm or vice versa, implying that the two may be very closely linked.…”

Section: Discussionmentioning

confidence: 99%

Tidal, Daily, and Lunar‐Day Activity Cycles in the Marine PolychaeteNereis virens

Bailhache

Kramer

Kyriacou

et al. 2009

Chronobiology International

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The burrow emergence activity of the wild caught ragworm Nereis virens Sars associated with food prospecting was investigated under various photoperiodic (LD) and simulated tidal cycles (STC) using a laboratory based actograph. Just over half (57%) of the animals under LD with STC displayed significant tidal (approximately 12.4 h) and/or lunar-day (approximately 24.8 h) activity patterns. Under constant light (LL) plus a STC, 25% of all animals were tidal, while one animal responded with a circadian (24.2 h) activity rhythm suggestive of cross-modal entrainment where the environmental stimulus of one period entrains rhythmic behavior of a different period. All peaks of activity under a STC, apart from that of the individual cross-modal entrainment case, coincided with the period of tank flooding. Under only LD without a STC, 49% of the animals showed nocturnal (approximately 24 h) activity. When animals were maintained under free-running LL conditions, 15% displayed significant rhythmicity with circatidal and circadian/circalunidian periodicities. Although activity cycles in N. virens at the population level are robust, at the individual level they are particularly labile, suggesting complex biological clock-control with multiple clock output pathways.

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Section: Discussionmentioning

confidence: 99%

Tidal, Daily, and Lunar‐Day Activity Cycles in the Marine PolychaeteNereis virens

Bailhache

Kramer

Kyriacou

et al. 2009

Chronobiology International

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“…L. pavo has also been observed swarming and nocturnally migrating, sometimes with the tide, in subtropical waters near Japan (Ueda et al 1983;Saigusa and Oishi 2000;Saigusa et al 2003). Other pontellid copepods, specifically Anomalocera ornata Sutcliffe, 1949.…”

Section: Discussionmentioning

confidence: 99%

Neustonic copepods (Labidocera spp.) discovered living residentially in coral reefs

et al. 2017

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Pontellid copepods are archetypical representatives of the neuston-the highly specialized community living in the top 5-10 cm of the ocean surface. Their deep blue pigmentation and large eyes are unique adaptations to surface irradiation and carnivory, but poor prerequisites for survival in the transparent waters beneath the sea surface. Here, we report the discovery of three reef-associated representatives of this group-Labidocera bataviae A. Scott, 1909; L. pavo Giesbrecht, 1889; and Labidocera sp.-living residential in coral reefs. We (1) document the presence of Labidocera spp. for two separate coral reefs on two expeditions to Papua New Guinea, (2) describe their migration behavior and substrate preference, and (3) quantify the effects of benthic reef community composition on their abundance. All life stages of Labidocera spp. were 43 to 94 times as abundant at the reef sites as in offshore sites. Although pontellids are generally considered non-migrators, Labidocera spp. showed discernible diel vertical migrations: living in reef substrates during the day, emerging into the water column at night (sometimes more than once), and returning to the substrate at dawn. Labidocera spp. showed a pronounced substrate preference for coral rubble, microalgae, and turf, over branching coral, massive boulder coral, and sand.

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“…In broad terms, species can generally be categorized as diurnal (active during the day), crepuscular (active at dawn and dusk), or nocturnal (active during the night) ( Metcalfe, Fraser & Burns, 1998 ). Nocturnal activity is an important aspect of a species’ biology, and it is present in every major animal group ( Saigusa & Oishi, 2000 ; Gerkema et al, 2013 ; Ward et al, 2014 ; Meiri, 2018 ; Levy et al, 2019 ). Nocturnal animals are primarily active during the nighttime, when most of their necessary activities are done ( e.g.…”

Section: Introductionmentioning

confidence: 99%

Natrix natrix after dark: citizen science sheds light on the common grass snake’s nightlife

Spaseni,

Sahlean,

Gherghel

et al. 2024

PeerJ

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Activity patterns in animals are often species-specific, and can be generally categorized as diurnal, crepuscular, or nocturnal. Understanding these patterns provides insight into ecological adaptations and behaviors. The common grass snake (Natrix natrix), one of the most common and widespread European snake species, is traditionally considered diurnal, with scarce evidence of its crepuscular and nocturnal activity. We aimed to document the distribution, environmental conditions, and potential phenotype associations of nighttime activity in N. natrix. We used citizen science data from iNaturalist (1992–2022), Observation.org (2012–2022), together with personal field observations (2010–2023) to collect 127 crepuscular and nocturnal activity records. Most observations occurred between May and August, coinciding with the peak activity period of grass snakes across their distribution range. Statistical analyses revealed no significant difference in mean daily temperatures between crepuscular and nocturnal observations. However, striped individuals displayed nocturnal activity at higher temperatures, consistent with their distribution in warmer regions, but failed to register any difference when tested on a geographic subsample, that accounted for sympatry of the phenotypes. Surprisingly, we found no significant impact of moon presence or moonlight on nighttime activity or age class, contrary to expectations based on other snake species’ responses. While our study reveals that nocturnal activity in the common grass snake is geographically widespread, further research is warranted to understand its drivers and ecological implications. This study highlights the value of citizen science platforms for biological and ecological research, offering unparalleled spatial and temporal coverage by their users. In conclusion, our work extends the knowledge of nocturnal behavior in N. natrix and underlines the critical role of citizen science in discovering behavioral aspects of common and widespread species.

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Emergence Rhythms of Subtidal Small Invertebrates in the Subtropical Sea: Nocturnal Patterns and Variety in the Synchrony with Tidal and Lunar Cycles

Cited by 22 publications

References 26 publications

Tidal, Daily, and Lunar‐Day Activity Cycles in the Marine PolychaeteNereis virens

Tidal, Daily, and Lunar‐Day Activity Cycles in the Marine PolychaeteNereis virens

Neustonic copepods (Labidocera spp.) discovered living residentially in coral reefs

Natrix natrix after dark: citizen science sheds light on the common grass snake’s nightlife

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