Gut Microflora of the Japanese Giant Crab &lt;i&gt;Macrocheira kaempferi&lt;/i&gt;

Ueda, Ryutaro; Yasuhara, Takenobu; Sugita, Haruo; Deguchi, Yoshiaki

doi:10.2331/suisan.55.181

Cited by 3 publications

(3 citation statements)

References 2 publications

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“… Taxonomical Unit Movement Life Habit Trophic Habit References N % P Var. Echinodermata Pannychia moseleyi Walker Epibenthic Detritivore 47 , 48 62 0.86 — — — Echinothurioida Walker Epibenthic Detritivore 49 21 0.29 — — — Solaster paxillatus Walker Epibenthic Scavenger (and predator) 50 73 1.02 — — — Ophiurida Walker Endobenthic Detritivore 51 755 10.52 — — — Mollusca Buccinum yoroianum Walker Epibenthic Scavenger (and predator) 22 , 52 9 0.13 — — — Arthropoda Bathynomus doederleinii Swimmer Endobenthic Scavenger 53 349 4.86 — — — Macrocheira kaempferi Walker Epibenthic Scavenger (and predator) 43 , 54 1002 …”

Section: Resultsmentioning

confidence: 99%

Faunal activity rhythms influencing early community succession of an implanted whale carcass offshore Sagami Bay, Japan

Aguzzi

Fanelli

Ciuffardi

et al. 2018

Sci Rep

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Benthic community succession patterns at whale falls have been previously established by means of punctual submersible and ROV observations. The contribution of faunal activity rhythms in response to internal tides and photoperiod cues to that community succession dynamism has never been evaluated. Here, we present results from a high-frequency monitoring experiment of an implanted sperm whale carcass in the continental slope (500 m depth) offshore Sagami Bay, Japan. The benthic community succession was monitored at a high frequency in a prolonged fashion (i.e. 2-h intervals for 2.5 months) with a seafloor lander equipped with a time-lapse video camera and an acoustic Doppler profiler to concomitantly study current flow dynamics. We reported here for the first time, to the best of our knowledge, the occurrence of strong 24-h day-night driven behavioral rhythms of the most abundant species (Simenchelys parasitica; Macrocheira kaempferi, and Pterothrissus gissu). Those rhythms were detected in detriment of tidally-controlled ones. Evidence of a diel temporal niche portioning between scavengers and predators avoiding co-occurrence at the carcass, is also provided. The high-frequency photographic and oceanographic data acquisition also helped to precisely discriminate the transition timing between the successional stages previously described for whale falls’ attendant communities.

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Section: Resultsmentioning

confidence: 99%

Faunal activity rhythms influencing early community succession of an implanted whale carcass offshore Sagami Bay, Japan

Aguzzi

Fanelli

Ciuffardi

et al. 2018

Sci Rep

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“…These results are comparable to the highest values recorded for other decapods. For example, Mitra (1987) observed between 2xlO 8 and 6xlO 9 cells ml" 1 for Penaeus monodon whilst Ueda et al (1989) reported between Wand 10 9 cells g" 1 for Macrocheira kaempferi. The reduction in bacterial numbers within the midgut of U. stellata is indicative of bacterial lysis and digestion by the host.…”

Section: Discussionmentioning

confidence: 99%

Microbial Flora Associated with the Digestive System ofUpogebia Stellata(Crustacea: Decapoda: Thalassinidea)

Pinn¹,

Rogerson²,

Atkinson³

1997

J. Mar. Biol. Ass.

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The digestive system of the thalassinidean mud-shrimpUpogebia stellatawas investigated using scanning electron microscopy (SEM). Within the lumen of the midgut both filamentous and rod-shaped bacteria were observed. The hindgut microbial populations were dominated by dense mats of epimural rod-shaped bacteria. The gut contents were often dominated by diatoms but also contained bacteria, dinoflagellates, plant and algal fragments. Direct bacterial counts by epifluorescence microscopy along the length of the gut revealed a slight decrease in numbers within the midgut moving from the anterior to the posterior regions, and then a dramatic rise in numbers within the hindgut. Numbers decreased again in the posterior regions of the hindgut. Common in the transient / resident samples (bacterial population when gut contents were present) were enterobacteria and an unidentified fermenter conforming to an isolate named X-ferm. However, nearly 30% of the bacterial isolates remained unidentified. The resident-only bacterial isolates from the gut (determined when the gut was empty) were dominated by the X-ferm bacteria and to a lesser extent by the generaVibrioandAeromonas. With respect to the enzyme capabilities of the gut bacteria, the resident-only collection of bacterial isolates showed much higher levels of amylase, cellulase, chitinase, protease and lipase activity than the transient/resident bacterial isolate collections, suggesting that the indigenous bacteria are likely to play a significant role in the digestion of the gut contents. Thalassinidean shrimps are likely to play an important role in the breakdown of plant and detrital material, and the recycling of nutrients in marine benthic systems.

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“…Recent studies suggest that the predominant rod-shaped bacteria in the hindgut are tightly attached to the epithelium surface by an unusual pili-like structure (Chen et al, 2015). Several studies reported on gut flora of marine crabs which includes Callinectes sapidus (Huq et al, 1986), Macrocheira kaempferi (Ueda et al, 1989), Eriocheir sinensis , Scylla serrata, Scylla tranquebarica, Portunus pelagicus, Portunus sanguinolentus, Charybdis helleri (Ravichandran and Kannupandi, 2005;Rameshkumar et al, 2009) and reports also includes on pathogenic bacteria isolated from gut of Portunus pelagicus (Talpur et al, 2011). Despite these reports, there is still lack of similar information on crab species which inhabit mangrove environment.…”

Section: Author(s) Agree That This Article Remains Permanently Open Amentioning

confidence: 99%

Isolation of gut associated bacteria from mangrove crabs collected from different mangrove regions of Tamil Nadu, South east coast of India

Sivasubramanian¹,

Ravichandran²,

Rajan³

2017

Afr. J. Microbiol. Res.

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Mangrove crabs are mostly herbivorous which consume more amount of leaf litter of various mangrove species and also plays most important role in leaf degradation. Several studies reported that crab harbor bacteria from the environment through water and food. Bacterial species of the gut can influence the health and robustness of the host. The present study aims to isolate and enumerate the bacterial count from the gut of crabs collected from different mangrove environments. The results shows that maximum bacterial load was recorded in Sesarma brockii crabs gut collected from Pichavaram mangroves and minimum was observed in Metopograpsus maculatus crabs collected from Uppanar estuarine mangrove. In the same way, maximum bacterial load was observed in both water and sediment samples of Pichavaram. Bacteria belonging to the genera Bacillus, Pseudomonas and Aeromonas were found at higher levels in all the different mangrove regions. In conclusion, crabs in the various mangrove environments carry a particular bacterial flora, which reflects their environment. The Pichavaram mangrove ecosystem is endowed with a high bacterial load due to the continuous shedding of foliage into the water and subsequent decomposition than other mangrove environments. SEM results confirm that crowded populations of bacteria were attached to the gut region of the mangrove crabs.

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Gut Microflora of the Japanese Giant Crab <i>Macrocheira kaempferi</i>

Cited by 3 publications

References 2 publications

Faunal activity rhythms influencing early community succession of an implanted whale carcass offshore Sagami Bay, Japan

Faunal activity rhythms influencing early community succession of an implanted whale carcass offshore Sagami Bay, Japan

Microbial Flora Associated with the Digestive System ofUpogebia Stellata(Crustacea: Decapoda: Thalassinidea)

Isolation of gut associated bacteria from mangrove crabs collected from different mangrove regions of Tamil Nadu, South east coast of India

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