Excretion of ammonia and urea in seven species of marine prosobranch snails

Duerr, Frederick G.

doi:10.1016/0010-406x(68)90025-x

Cited by 26 publications

(5 citation statements)

References 14 publications

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“…Marine prosobranchs are basically ammoniotelic, although uric acid may be found in various tissues (Nicol, 1960;Duerr, 1968). The larval kidneys, however, do not contain uric acid.…”

Section: Lack Of Evidence Of Waste Accumulationmentioning

confidence: 99%

Studies on the Structure and Function of the Larval Kidney Complex of Prosobranch Gastropods

Rivest

1992

The Biological Bulletin

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The larval kidneys of prosobranch gastropods have long been assumed to be involved in handling wastes, but with little supporting evidence. In this study, the larval kidneys of Searlesia dira and Nucella canaliculata were studied with light, electron, and fluorescence microscopy. They consist of three cell types: (1) a large external absorptive cell swollen with heterophagosomes and possessing an endocytotically active external surface; (2) an internal crystal cell with numerous vacuole-bound crystals of a calcium salt and with morphologically complex canaliculi; (3) an internal pore cell characterized by slit-pores that lead to subsurface cisternae, a tubular network, and one or two ciliated ducts that open into the hemocoel. Empirical evidence indicates that the absorptive cell rapidly takes up and stores albumen proteins from the capsular fluid. Absorptive cells were found in 17 of 19 species tested, representing three prosobranch orders, but were not found in 2 opisthobranch or 1 pulmonate species. We hypothesize that the absorptive cells have become specialized for the uptake of capsular albumen prior to the functional differentiation of the gut. However, the nutritional importance of the absorbed albumen proteins and the functions of the crystal and pore cells are presently unknown. No evidence for an excretory function was found for the larval kidney complex; it may be a vestigial protonephridium, the components of which have become disorganized and functionally altered.

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“…Marine prosobranchs are basically ammoniotelic, although uric acid may be found in various tissues (Nicol, 1960;Duerr, 1968). The larval kidneys, however, do not contain uric acid.…”

Section: Lack Of Evidence Of Waste Accumulationmentioning

confidence: 99%

Studies on the Structure and Function of the Larval Kidney Complex of Prosobranch Gastropods

Rivest

1992

The Biological Bulletin

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“…Thus Lvmnaea and Indoplanorbis, the usual hosts of trematode parasites, tend to be more ureotelic, while Pila and Viviparus, the unusual hosts, appear more ammoniotelic . The importance of urea in arginine production in fresh (Duerr, 1968), and an arginine requirement for the larval trematodes have been suggested . Therefore, urea retention might be still another reason for L. vmnaea and Indoplanorbis to be the preferred hosts for larval trematodes .…”

Section: Discussionmentioning

confidence: 99%

Nitrogenous compounds of the body fluids of usual and unusual gastropod hosts of larval trematodes

Rao

Narayanan

1976

Hydrobiologia

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“…They have led to the concept of storage, which needs further investigation. In older studies, quantities of ammonia, urea and uric acid were detected in water containing marine snails, but when bacterial degradation was suppressed, Duerr (1968) found no urea to be excreted by any of 7 species of marine prosobranch. Needham therefore related the concentration of uric acid in the kidney to the availability of water.…”

Section: Marine Prosobranchsmentioning

confidence: 93%

“…In general it must be concluded, with Duerr (1968), that most species excrete uric acid and ammonia as the main products of nitrogenous metabolism, and that the degree of reliance upon either of these two substances has yet to be shown to be related to the habitat of particular species. In general it must be concluded, with Duerr (1968), that most species excrete uric acid and ammonia as the main products of nitrogenous metabolism, and that the degree of reliance upon either of these two substances has yet to be shown to be related to the habitat of particular species.…”

Section: Marine Prosobranchsmentioning

confidence: 99%

Osmoregulation and Excretion in Prosobranch Gastropods Part I: Physiology and Biochemistry

Little

1981

Journal of Molluscan Studies

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INTRODUCTIONThe mechanisms of excretion in molluscs were reviewed by Potts (1967), and those specific to gastropods by Potts (1975), but reviews of osmoregulation in invertebrates have usually taken a broad view and dealt with a number of phyla. This review, which is presented in two parts, attempts to summarize current knowledge concerning both excretion and osmoregulation in prosobranch gastropods.Prosobranch gastropods have colonized a very wide range of habitats, from the sea and brackish waters to fresh water and parts of the land. Their degree of tolerance of changes in external conditions is therefore immensely varied. Some marine species are closely confined to normal sea water, while estuarine species such as Assiminea grayana Fleming can tolerate a range from fresh water to twice the concentration of sea water (Seelemann, 1968b;Little & Andrews, 1977). Freshwater species also show great diversity: Valvata piscinalis (Miiller) and V. cristata Miiller are found in waters with as little calcium as 0.13 mM 1~', whereas others such as V. macrostoma Morch require at least 0.5 mM 1~' (Boycott, 1936). On land, most prosobranchs are restricted to humid, calcium-rich environments, but although none lives in deserts as do some pulmonates, many tropical species of Pomatiasidae are found on dry limestone cliffs.This variation in tolerance must also be considered with reference to the diversity of structural organization. Scattered information is available for more than 25 different families, including members of all the prosobranch orders, so that it is not surprising to find quite a degree of variation. To avoid confusion, the species and families referred to are set out in Table 1.

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Excretion of ammonia and urea in seven species of marine prosobranch snails

Cited by 26 publications

References 14 publications

Studies on the Structure and Function of the Larval Kidney Complex of Prosobranch Gastropods

Studies on the Structure and Function of the Larval Kidney Complex of Prosobranch Gastropods

Nitrogenous compounds of the body fluids of usual and unusual gastropod hosts of larval trematodes

Osmoregulation and Excretion in Prosobranch Gastropods Part I: Physiology and Biochemistry

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