Energetics, Particle Capture, and Growth Dynamics of Benthic Suspension Feeders

Sebens, Kenneth P.; Sarà, Gianluca; Nishizaki, Michael T.

doi:10.1007/978-3-319-17001-5_17-1

Cited by 7 publications

(3 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bifurcated radioles maximize the surface area of S. insignis (Knight‐Jones et al., 2017). In the end, the radiole morphology of a sabellid post‐regeneration is important because available surface area corresponds to the worm's feeding and respiration efficiency (Dales, 1957; Sebens et al., 2017).…”

Section: Discussionmentioning

confidence: 99%

Natural radiole damage and regeneration in the feather duster worm Schizobranchia insignis

Brown

Emlet

2020

Invertebrate Biology

View full text Add to dashboard Cite

The feather duster worm Schizobranchia insignis is an abundant marine annelid found subtidally and in the low intertidal of the northeastern Pacific Ocean. As in other sabellids, the anterior appendages, used for feeding and respiration, can be damaged by physical or biological means. Limited information is available on the regeneration of radioles leading us to study this process on a worm with radioles that dichotomously branch. First, we documented the occurrence of natural radiole damage in two populations of S. insignis found at environmentally distinct sites: a subtidal marina and an intertidal, rocky bench. All 21 worms collected from the exposed intertidal bench had branchial crown damage, whereas 15 of 22 worms (68%) sampled in the marina exhibited natural radiole damage. In the laboratory, we observed radiole regeneration on individuals of S. insignis from the marina by removing a single radiole. Radiole regrowth was a continuous process in which functionality was restored through radiole bifurcation, elongation, and the development of internal support structures. The regrowth of a single radiole of S. insignis took more than 35 days. However, in one of our studies, after 21 days, although not all individuals recovered, four of 12 worms (33%) had completed bifurcation. Pointed tips on the distal‐most branches signified the end of bifurcation. During recovery, individuals of S. insignis did not consistently regenerate the same number of branches observed prior to damage. In addition, a majority of the radiole elongation during recovery occurred after branching. The radiole regeneration in Eudistylia vancouveri, a closely related species found in the marina, was observed to compare regeneration in co‐occurring species. We found that the radiole regeneration in E. vancouveri was less complex because of the absence of branching. Since Schizobranchia is the only genus in which radioles are branched, our study of S. insignis provides a unique examination of natural radiole damage and regrowth.

show abstract

Section: Discussionmentioning

confidence: 99%

Natural radiole damage and regeneration in the feather duster worm Schizobranchia insignis

Brown

Emlet

2020

Invertebrate Biology

View full text Add to dashboard Cite

show abstract

“…This study is the first empirical evidence of negative impact on commercial mussel cultivation by the anemone A. sphyrodeta. A. sphyrodeta is a predatory species that feeds mostly small fishes and zooplankton with the actions of its tentacles (Sebens et al 2016). Therefore, competition for food resources can be negligible for this anemone-mussel interaction since mussels are filter-feeders with phytoplankton as main food type resource.…”

Section: Discussionmentioning

confidence: 99%

The impact of the sea anemone Actinothoe sphyrodeta on Mytilus galloprovincialis mussel cultivation (Galicia, Spain)

et al. 2018

View full text Add to dashboard Cite

Marine mussel aggregations act as a substrate and refuge for many fouling species, which may attach to mussel shells. Mussel cultivation in Galicia, Spain, is carried out on hanging ropes in subtidal systems. The fauna associated with this cultivation includes a great number of invertebrates that compete for space or food with the mussels, or use their clusters, as a refuge from predators or water turbulence. Outbreaks of the epibiont anemone Actinothoe sphyrodeta have been reported in cultivated Galician mussels since 2013, but their impact has not been scientifically investigated. Here, temporal and spatial variability of Actinothoe sphyrodeta on mussel shells throughout one year is presented.Sampling of mussel size, weight, and byssus attachment strength allowed calculation of mussel tenacity (attachment strength relative to size). Higher Actinothoe sphyrodeta presence correlated with lower mussel tenacity and greater biomass losses, suggesting that this species could be an economically important biofouling component.

show abstract

“…In aquatic ecosystems, animals that feed on particles suspended in the water are collectively known as filter feeders (Jørgensen, 1990). Bivalves tend to be the dominant suspension feeders in benthic communities (Sebens et al, 2016;Filgueira et al, 2019), filtering large volumes of water whilst retaining a wide range of particle sizes (ca. 4-35 µm diameter) (Voudanta et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Feeding of Aulacomya atra Under Different Organic Matter Sources (Autochthonous and Allochthonous) in a Chilean Patagonia Fjord Ecosystem

et al. 2021

View full text Add to dashboard Cite

Aulacomya atra is an active suspension feeder, spatially dominant in the shallow-water hard-bottom benthic communities of the Chilean Patagonia fjords. In this region, the vertical flux of autochthonous organic matter (OM) reaching the benthos is augmented by allochthonous OM both from a terrestrial origin and from intensive salmon farming. This mixed pool of OM represents a potential source of food for a variety of benthic consumers, but to date little is known about the degree of utilization of these materials by filter feeders organisms. In this context, feeding experiments on A. atra in Puyuhuapi Fjord, Chilean Patagonia, were conducted during summer and winter 2018–2019. These experiments were designed to determine ingestion rates (IR) of A. atra fed with autochthonous (bacterial and microplanktonic community) and allochthonous (salmon food pellet) OM. Additionally, samples of A. atra tissues and suspended particulate organic matter (SPOM) were taken from the study area for stable isotope analysis. Data from laboratory experiments indicated that A. atra can feed on both autochthonous and allochthonous OM, but higher IR were detected in individuals fed with salmon food pellets. Because the IR is sensitive to food particle density rather than specific type of food, diet preferences of A. atra in feeding experiments could not be determined. Stable isotope analyses indicate that A. atra in natural environment preferentially exploits food with an isotopic signal corresponding to autochthonous OM, highlighting the primary role of phytoplankton carbon in their diet. Extensive utilization of terrestrially derived OM is therefore unlikely, although utilization of OM derived from salmon farming is not precluded because of the overlap in isotopic signal between food pellets and marine plankton.

show abstract

Energetics, Particle Capture, and Growth Dynamics of Benthic Suspension Feeders

Cited by 7 publications

References 66 publications

Natural radiole damage and regeneration in the feather duster worm Schizobranchia insignis

Natural radiole damage and regeneration in the feather duster worm Schizobranchia insignis

The impact of the sea anemone Actinothoe sphyrodeta on Mytilus galloprovincialis mussel cultivation (Galicia, Spain)

Feeding of Aulacomya atra Under Different Organic Matter Sources (Autochthonous and Allochthonous) in a Chilean Patagonia Fjord Ecosystem

Contact Info

Product

Resources

About