The feeding habits and food sources of the deposit-feeding polychaete, Neanthes japonica (Izuka)

Tsuchiya, Makoto; Kurihara, Yasushi

doi:10.1016/0022-0981(79)90101-1

Cited by 53 publications

(32 citation statements)

References 16 publications

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“…In the experimental aquaria, Hediste worms fed on commercial fish food (Sato & Nakashima 2003, present study), macro-algae (Sato 2006), and the deposits collected from the sediment surface of tidal flats and their isolated components (bacteria and protozoa, diatoms, cyanobacteria, Hediste faeces; see Tsuchiya & Kurihara 1979). Therefore, the filter feeding of the three Asian Hediste species is not obligatory but facultative, as for H. diversicolor (Nielsen et al 1995) and is probably a generic feature of Hediste unique among nereidid polychaetes, although it has yet to be confirmed in the American species, H. limnicola.…”

Section: Discussionmentioning

confidence: 99%

“…It is of interest to discern whether or not the other four species of Hediste, as well as H. diversicolor, show such facultative filter-feeding since only deposit feeding on the sediment surface is known for Asian Hediste species (Tsuchiya & Kurihara 1979, Sato & Nakashima 2003, Sato 2006. To investigate the presence of filter-feeding ability, the feeding behavior of three Asian Hediste species was observed in transparent glass tubes in aquaria.…”

Section: Introductionmentioning

confidence: 99%

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Filter-feeding behavior of three Asian Hediste species (Polychaeta: Nereididae)

Toba

Sato

2013

Plankton Benthos Res

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Abstract:The three Hediste species H. japonica, H. diadroma and H. atoka (Polychaeta: Nereididae) live in burrows in estuarine intertidal flats in eastern Asia and have been regarded as surface deposit feeders. Their filter-feeding behavior was investigated in laboratory experiments where the worms were placed in a U-shaped glass tube. The behavior is basically the same among the three species and the same as that previously observed in H. diversicolor inhabiting Atlantic coasts and consists of the following four steps: (1) Moving up to the end of the tube; (2) retreating slowly down, with the anterior body expanded laterally and moving from side to side in semicircles, making a transparent, funnel-shaped mucous net; (3) orientation of the head at 2.5-6.0 cm below the end of the glass tube, and pumping water through the net by means of active undulating movements of the body for 1-5 min; (4) moving forward and swallowing the mucous net together with the trapped particles. This behavior is accelerated by adding organic particles to the seawater. Such facultative filter feeding is judged as a unique generic characteristic of Hediste among the Nereididae and its ecological significance is discussed in relation to their estuarine habitats.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Filter-feeding behavior of three Asian Hediste species (Polychaeta: Nereididae)

Toba

Sato

2013

Plankton Benthos Res

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“…or spp. are surface deposit feeders (Tsuchiya & Kurihara 1979) grazing mainly on benthic diatoms (Kanaya et al 2008b), so the high abundance of microphytobenthos in the Exclusion treatment may have led to an increase in the density of this polychaete, while in Control and Cage Control treatments M. japonicus might have partly restricted their distribution by causing a decrease in microphytobenthos abundance. Other studies also have suggested that bioturbators affect surface deposit feeders through decreasing the abundance of microphytobenthos and organic matter (Botto & Iribarne 1999.…”

Section: Effects Of M Japonicus On Macro-infauna Densitymentioning

confidence: 99%

Experimental exclusion of the burrowing crab Macrophthalmus japonicus from an intertidal mud flat: effects on macro-infauna abundance

Tanaka

Horikoshi

Aoki

et al. 2013

Plankton Benthos Res

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Abstract:Bioturbators affect other benthic animals by two processes: sediment reworking and changes in chemical properties. Crab exclusion experiments were conducted on an intertidal mud flat in the Tama estuary to examine the effects of the burrowing crab Macrophthalmus japonicus (Ocypodoidea) on the densities of sympatric macro-infauna in 2010 and 2011; and on sediment parameters in 2011. In 2010, approximately 1 month after M. japonicus was excluded, the densities of Corbicula japonica and Hediste sp. or spp. were significantly greater than those of the control, with M. japonicus present. Concerning sediment parameters: chlorophyll-a content, water content and total nitrogen content at the surface significantly increased and subsurface oxidation-reduction potential significantly decreased in the exclusion treatment compared with control conditions. These results appear to indicate that sediment reworking by M. japonicus was the main process affecting the sedimentary environment and density of C. japonica and Hediste sp. or spp. However, the magnitude of the effects of M. japonicus apparently varies from year to year because there were no significant differences in the densities of any macro-infauna species in 2011.

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“…It has also been suggested that oligochaete worms consume bacteria [29][30][31][32] and change the microbial diversity in natural sediments [30] or the sludge [33] that the aquatic worms inhabit.…”

Section: Introductionmentioning

confidence: 99%

Physical and biochemical changes in sludge uponTubifex tubifexpredation

Valk

Khadem

Foreman

et al. 2016

Environmental Technology

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Worm predation (WP) on activated sludge leads to increased sludge degradation rates, irrespective of the type of worm used or reactor conditions employed. However, the cause of the increased sludge degradation rates remains unknown. This paper presents a comparative analysis of the physical and biochemical aspects of predated sludge, providing insight into the hydrolytic mechanisms underlying WP. To this end, the sessile worm Tubifex tubifex was used as a model oligochaete and was batch cultivated in an 18-L airlift reactor. Predation on activated sludge showed an average reduction rate of 12 ± 3.8%/d versus 2 ± 1.3%/d for endogenous respirated sludge. Sludge predation resulted in an increased release of inorganic nitrogen, phosphate and soluble chemical oxygen demand (sCOD). The sCOD consisted mainly of polysaccharides; however, fluorescence excitation emission matrix spectroscopy analysis also revealed the presence of Tryptophan-protein-like substances. Results suggest that the released polysaccharides contain a protein-like element. Additionally, soluble iron increased slightly in concentration after WP. The extent of hydrolysis seemed to reach an average plateau of about 40% volatile solids (VS) reduction after 4 days, which is substantially higher than the 29% VS reduction for endogenous decay of activated sludge after 30 days. Furthermore, T. tubifex predominantly consumed the protein fraction of the extracellular polymeric substances. Results suggest that that the worms specifically target a fraction of the sludge that is predominantly biodegradable under aerobic conditions, albeit at significantly higher degradation rates when compared to the endogenous decay of waste activated sludge. ARTICLE HISTORY

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The feeding habits and food sources of the deposit-feeding polychaete, Neanthes japonica (Izuka)

Cited by 53 publications

References 16 publications

Filter-feeding behavior of three Asian Hediste species (Polychaeta: Nereididae)

Filter-feeding behavior of three Asian Hediste species (Polychaeta: Nereididae)

Experimental exclusion of the burrowing crab Macrophthalmus japonicus from an intertidal mud flat: effects on macro-infauna abundance

Physical and biochemical changes in sludge uponTubifex tubifexpredation

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