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- W2890939648 abstract "Abstract The European cave spider, Meta menardi , is among the most common troglophile species inhabiting the cave entrance zone in Europe, where prey is scarce in winter. Spiders feed only if prey is available; otherwise, they are subjected to long-term winter starvation. We carried out a four-month winter starvation of M. menardi under controlled conditions to analyze ultrastructural changes in the midgut diverticula epithelial cells at the beginning, in the middle and at the end of the starvation period. We used light microscopy, TEM and quantified reserve lipids and glycogen. The midgut diverticula epithelium consisted of secretory cells, digestive cells and adipocytes. During starvation, gradual vacuolization of some digestive cells, and some necrotic digestive cells and adipocytes appeared. Autophagic structures, autophagosomes, autolysosomes and residual bodies were found in all three cell types. Spherites and the energy-reserve compounds were gradually exploited, until in some spherites only the membrane remained. Comparison between spring, autumn and winter starvation reveals that, during the growth period, M. menardi accumulate reserve compounds in spherites and protein granules, and energy-supplying lipids and glycogen, like many epigean, overwintering arthropods. In M. menardi , otherwise active all over the year, this is an adaptive response to the potential absence of prey in winter." @default.
- W2890939648 created "2018-09-27" @default.
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- W2890939648 date "2018-09-11" @default.
- W2890939648 modified "2023-10-16" @default.
- W2890939648 title "Changes in the midgut diverticula epithelial cells of the European cave spider, Meta menardi, under controlled winter starvation" @default.
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- W2890939648 doi "https://doi.org/10.1038/s41598-018-31907-3" @default.
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