Enveloping walls, encapsulated embryos and intracapsular fluid: changes during the early development stages in the gastropod Acanthina monodon (Muricidae)

Büchner-Miranda, J.A.; Thompson, R. J.; Pardo, Luis Miguel; Matthews-Cascon, Helena; Salas-Yanquin, L.P.; Andrade-Villagrán, P.V.; Chaparro, Óscar R.

doi:10.1093/mollus/eyy045

Cited by 6 publications

(6 citation statements)

References 49 publications

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“…2 b,c). This configuration of a vacuolar microstructure has been identified in other egg capsules from Acanthina monodon (Muricidae) 32 and Dicathais orbita (Neogastropoda, Muricidae) 9 as well as in capsules of gastropods from deep-sea hydrothermal vent environments 33 . The role of these vacuolar structures is not well known, but they could be associated with mechanical protection.…”

Section: Discussionsupporting

confidence: 52%

Micromorphological details and identification of chitinous wall structures in Rapana venosa (Gastropoda, Mollusca) egg capsules

Schröder

Rău

Dobrin

et al. 2020

Sci Rep

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The present study evaluated the structural and ultrastructural characteristics of Rapana venosa egg capsules, starting from observations of their antifouling activity and mechanical resistance to water currents in mid-shore habitats. Optical microscopy, epifluorescence, and electron microscopy were used to evaluate the surface and structure of the R. venosa egg capsules. These measurements revealed an internal multilamellar structure of the capsule wall with in-plane distributions of layers with various orientations. It was found that the walls contained vacuolar structures in the median layer, which provided the particular characteristics. Mechanical, viscoelastic and swelling measurements were also carried out. This study revealed the presence and distribution of chitosan in the capsule of R. venosa. Chitosan identification in the egg capsule wall structure was carried out through SEM-EDX measurements, colorimetric assays, FT-IR spectra and physical-chemical tests. The biopolymer presence in the capsule walls may explain the properties of their surfaces as well as the mechanical resistance of the capsule and its resistance to chemical variations in the living environment.

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Section: Discussionsupporting

confidence: 52%

Micromorphological details and identification of chitinous wall structures in Rapana venosa (Gastropoda, Mollusca) egg capsules

Schröder

Rău

Dobrin

et al. 2020

Sci Rep

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“…Several macromolecules and mineralization factors might be related to the colloidal properties and stability of the intracapsular fluid (Raven & Trinkaus, 1958). The increased viscosity of the intracapsular fluid might be necessary for supporting fragile embryos (Büchner‐Miranda et al, 2018). As embryos absorb the organic matter, the proteins lose their viscosity.…”

Section: Discussionmentioning

confidence: 99%

Changes in intracapsular fluid nutritional composition during the early development of the marine gastropod Hemifusus tuba Gmelin

Han

Jiang

et al. 2022

Aquaculture Research

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Hemifusus tuba Gmelin, a large marine gastropod, is an economically important species widely distributed on sandy and muddy substrates along the coasts of the Philippines, China, and Japan (Morton, 1985).It is considered high-quality seafood due to its high protein and low lipid content. Of note, the lipid and protein content of H. tuba increases with increasing organismal growth. A total of 18 amino acids, including glutamic acid, glycine, aspartic acid, and arginine, have been identified in H. tuba (Jiang et al., 2012). Adding glycine to the feed increased the feeding and weight gain rates (Zhou et al., 2018). Several studies have focused on its prey preference, capture,

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“…The uptake by developing embryos of nutrients in perivitelline fluid was reported in Siphonaria serrata (F ischer 1807) and Siphonaria capensis ( Quoy & Gaimard 1833) from South Africa, which have direct and free larval development, respectively (Pal & Hodgson, , ), although the relevance of these nutrients in the development was not established. Another potential source of intracapsular nutrients, considering the absence of nurse eggs, could be dissolved organic matter derived from the disintegration of the inner egg capsule wall (Bigatti, Giraud‐Billoud, Vega, Penchaszadeh, & Castro‐Vazquez, ; Buchner‐Miranda et al, ; Klussmann‐Kolb & Wägele, ). Rivest () described the functionality of embryonic absorptive cells as larval kidneys, which show no excretory function, but instead are related to early intracapsular nutrient uptake.…”

Section: Discussionmentioning

confidence: 99%

Embryonic development of the false limpet Siphonaria lateralis from Atlantic Patagonia

Zabala

Averbuj

Bigatti

et al. 2020

Invertebrate Biology

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Siphonariids are pulmonate gastropods inhabiting rocky intertidal habitats, and many studies have focused on these false limpets around the world. In the southern South Atlantic, studies on reproduction and development in species of Siphonaria are scarce. We studied the embryonic development and egg masses of Siphonaria lateralis at its northernmost distribution in Atlantic Patagonia. In S. lateralis, as in most species of Siphonaria, individuals spawn benthic egg masses that strongly attach to intertidal rocky substrata. A single spherical egg that measures ~120 µm develops inside the egg capsule of S. lateralis. Considering the relatively small egg size, and reports from previous studies, the developmental modality of S. lateralis might be expected to include a planktotrophic larval phase. However, we found that hatchlings emerged as 1‐mm crawling juveniles, probably owing to the presence of intracapsular fluid, which may provide the energetic requirements for direct development. The embryonic size changed little from the egg to veliger stages, and then increased rapidly until the hatchling stage. We compared development in S. lateralis with development in the sympatric Siphonaria lessonii, in which egg size was reported to be ~80 µm and hatching occurs as planktotrophic veliger larvae. In these two species, spawn and early intracapsular developmental modes are remarkably different; these differences represent contrasting ways to survive in the harsh and physically stressful intertidal Patagonian coasts.

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Enveloping walls, encapsulated embryos and intracapsular fluid: changes during the early development stages in the gastropod Acanthina monodon (Muricidae)

Cited by 6 publications

References 49 publications

Micromorphological details and identification of chitinous wall structures in Rapana venosa (Gastropoda, Mollusca) egg capsules

Micromorphological details and identification of chitinous wall structures in Rapana venosa (Gastropoda, Mollusca) egg capsules

Changes in intracapsular fluid nutritional composition during the early development of the marine gastropod Hemifusus tuba Gmelin

Embryonic development of the false limpet Siphonaria lateralis from Atlantic Patagonia

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