Predaceous Feeding in Two Common Gooseneck Barnacles

Howard, G.; Scott, H.

doi:10.1126/science.129.3350.717

Cited by 24 publications

(12 citation statements)

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“…Lepas anatifera may reach a body length of 20 cm and the mandibles and maxillules have very prominent, pointed teeth (Figs 62-64) which can assist in killing and tearing substantially larger prey than found in balanomorph diets. In accordance, Howard & Scott (1959) fed this species with Artemia and found polychaetes, amphipods, carideans, gastropods and bivalves in the guts of field-collected specimens. Another species, Lepas ansifera, has actually been observed to prey on Physalia and small fish (Bieri 1966;Jones 1968).…”

Section: Comparison Of Species and Relation To Dietmentioning

confidence: 68%

Scanning Electron Microscopy of Mouth Appendages in Six Species of Barnacles (Crustacea Cirripedia Thoracica)

1994

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Hpeg, J . T., Karnick, E. S. & Frdander, A . 1994. Scanning electron microscopy of mouth appendages in six species of barnacles (Crustacea Cirripedia Thoracica).-Acta Zoologica (Stockholm) 75: 337-357.The morphology and setation of mouth appendages (trophi) are investigated with scanning electron microscopy in the balanomorph barnacles Semibalanus balanoides, Bafanus balanus and B. nubilus and in the pedunculate barnacles Pollicipes polymerus, P. cornucopia and Lepas anatifera. It is difficult to uphold a clearcut distinction between denticles and setae and several types of setae also intergrade with each other. The trophi of Pollicipes polymerus and P. cornucopia have the most 'generalized' morphology. The palps of Pollicipes and L. anatifera are simpler than those in balanomorphs and carry a single type of sera. In L. anatifera the mandibles and maxillules are adapted to a semi-predatory feeding habit by carrying large, pointed teeth, but this species lacks the foliate-serrate setae which populate the pa@ in the other species studied. Compared with Pollicipes and Lepas, the three balanomorphs have palps with a complex setation. The trophi in S. balanoides differ from the two species of Balanus in numerous features of setation and denticulation, notably in having the palps populated by plumodenticulate setae homologous to purely denticulated types in Balanus. It is suggested that SEM studies of barnacle trophi will provide characters of use in estimating phylogeny.

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Section: Comparison Of Species and Relation To Dietmentioning

confidence: 68%

Scanning Electron Microscopy of Mouth Appendages in Six Species of Barnacles (Crustacea Cirripedia Thoracica)

1994

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“…krills 47 , 48 ; copepods 49 ) or occasionally (e.g. barnacles 50 – 53 ) engage in raptorial predation, or by the progressive shift from filter-feeding to raptorial predation during ontogeny in some fairy shrimps 54 , barnacles 52 , or krills 47 . Actually, there might be a positive correlation between body size and contribution of animal-derived food to the diet in crustaceans, with larger taxa/individuals preying more and targeting larger preys.…”

Section: Discussionmentioning

confidence: 99%

New suspension-feeding radiodont suggests evolution of microplanktivory in Cambrian macronekton

2018

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The rapid diversification of metazoans and their organisation in modern-style marine ecosystems during the Cambrian profoundly transformed the biosphere. What initially sparked this Cambrian explosion remains passionately debated, but the establishment of a coupling between pelagic and benthic realms, a key characteristic of modern-day oceans, might represent a primary ecological cause. By allowing the transfer of biomass and energy from the euphotic zone—the locus of primary production—to the sea floor, this biological pump would have boosted diversification within the emerging metazoan-dominated benthic communities. However, little is known about Cambrian pelagic organisms and their trophic interactions. Here we describe a filter-feeding Cambrian radiodont exhibiting morphological characters that likely enabled the capture of microplankton-sized particles, including large phytoplankton. This description of a large free-swimming suspension-feeder potentially engaged in primary consumption suggests a more direct involvement of nekton in the establishment of an oceanic pelagic-benthic coupling in the Cambrian.

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“…Lepadid barnacles are known to be very nonselective feeders. For example, L.anatifera opportunistically ingests a wide variety of zooplankton and even fills its gut with sand when stranded on the beach (Howard & Scott, 1959). L. anatifera can also readily consume large prey items up to 5 mm in diameter, larger than the majority of microplastic debris (Patel, 1959).…”

Section: Discussionmentioning

confidence: 99%

Gooseneck barnacles (Lepasspp.) ingest microplastic debris in the North Pacific Subtropical Gyre

Goldstein

Goodwin

2013

PeerJ

209

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Substantial quantities of small plastic particles, termed “microplastic,” have been found in many areas of the world ocean, and have accumulated in particularly high densities on the surface of the subtropical gyres. While plastic debris has been documented on the surface of the North Pacific Subtropical Gyre (NPSG) since the early 1970s, the ecological implications remain poorly understood. Organisms associated with floating objects, termed the “rafting assemblage,” are an important component of the NPSG ecosystem. These objects are often dominated by abundant and fast-growing gooseneck barnacles (Lepas spp.), which predate on plankton and larval fishes at the sea surface. To assess the potential effects of microplastic on the rafting community, we examined the gastrointestinal tracts of 385 barnacles collected from the NPSG for evidence of plastic ingestion. We found that 33.5% of the barnacles had plastic particles present in their gastrointestinal tract, ranging from one plastic particle to a maximum of 30 particles. Particle ingestion was positively correlated to capitulum length, and no blockage of the stomach or intestines was observed. The majority of ingested plastic was polyethylene, with polypropylene and polystyrene also present. Our results suggest that barnacle ingestion of microplastic is relatively common, with unknown trophic impacts on the rafting community and the NPSG ecosystem.

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Predaceous Feeding in Two Common Gooseneck Barnacles

Cited by 24 publications

References 0 publications

Scanning Electron Microscopy of Mouth Appendages in Six Species of Barnacles (Crustacea Cirripedia Thoracica)

Scanning Electron Microscopy of Mouth Appendages in Six Species of Barnacles (Crustacea Cirripedia Thoracica)

New suspension-feeding radiodont suggests evolution of microplanktivory in Cambrian macronekton

Gooseneck barnacles (Lepasspp.) ingest microplastic debris in the North Pacific Subtropical Gyre

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