Evidence map›Paper›PMID 30123529›Full record

ArticleZoological letters2018

Morphological responses to feeding in ticks

J Matthias Starck, Lisa Mehnert, Anja Biging, Juliana Bjarsch, Sandra Franz-Guess, Daniel Kleeberger, Marie Hörnig

Abstract read
In one paragraph

Article in Zoological letters, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed.

  1. Article
  2. Real time PCR identification ofOpen veterinary journal · 2026
    Article
  3. Article
  4. Review
  5. Article
  6. Acquired tick resistance inInfection and immunity · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Infection withViruses · 2022
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

J Matthias Starck1Functional Morphology Group, Department of Biology 2, University of Munich (LMU), Biocenter Martinsried, Großhadernerstr. 2, D-82152 Planegg-, Martinsried, Germany.ORCID 0000-0001-7882-9482
Lisa Mehnert1Functional Morphology Group, Department of Biology 2, University of Munich (LMU), Biocenter Martinsried, Großhadernerstr. 2, D-82152 Planegg-, Martinsried, Germany.
Anja Biging1Functional Morphology Group, Department of Biology 2, University of Munich (LMU), Biocenter Martinsried, Großhadernerstr. 2, D-82152 Planegg-, Martinsried, Germany.
Juliana Bjarsch1Functional Morphology Group, Department of Biology 2, University of Munich (LMU), Biocenter Martinsried, Großhadernerstr. 2, D-82152 Planegg-, Martinsried, Germany.
Sandra Franz-Guess1Functional Morphology Group, Department of Biology 2, University of Munich (LMU), Biocenter Martinsried, Großhadernerstr. 2, D-82152 Planegg-, Martinsried, Germany.
Daniel Kleeberger1Functional Morphology Group, Department of Biology 2, University of Munich (LMU), Biocenter Martinsried, Großhadernerstr. 2, D-82152 Planegg-, Martinsried, Germany.
Marie HörnigZoological Institute and Museum, Cytology and Evolutionary Biology, Soldmannstr 23, D17487 Greifswald, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTicks can survive long periods without feeding but, when feeding, ingest large quantities of blood, resulting in a more than 100-fold increase of body volume. We study morphological adaptations to changes in opisthosoma volume during feeding in the castor bean tick,

methodsUsing light and electron microscopy, we compare the cuticle and epidermis of the alloscutum, the epithelium of the midgut diverticula, and the tracheae of adult female ticks when fasting, semi-engorged, and fully engorged.

resultsOur results add to an existing body of knowledge that the area of the epidermis increases by cellular differentiation, cellular hypertrophy, and changes in the shape of epithelial cells from pseudostratified to single layered prismatic in semi-engorged ticks, and to thin squamous epithelium in fully engorged ticks. We did not find evidence for cell proliferation. The midgut diverticula accommodate the volume increase by cellular hypertrophy and changes in cell shape. In fully engorged ticks, the epithelial cells of the midgut diverticula are stretched to an extremely thin, squamous epithelium. Changes in size and shape (and cell divisions) contribute to the accommodation of volume changes. Tracheae do not increase in size, but extend in length, thus following the volume changes of the opisthosoma in feeding ticks to secure oxygen supply to the internal organs.

conclusionsChanges of epithelial tissue configuration in the epidermis and the midgut diverticula are described as important components of the morphological response to feeding in ticks. We provide evidence for a previously unknown mechanism hosted in the endocuticle of the tracheae that allows the tracheae of castor bean ticks to expand when the body volume increases and the distance between the respiratory spiracle and the oxygen demanding tissue enlarges. This is the first report of expandable tracheae in arthropods.

Indexed as

CuticulaEpidermisFeedingMidgut diverticulaTaenidiaTracheaeVolume change

Identifiers

PMID30123529
PMCPMC6091150

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.