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Freshwater Snails Of Anwai River
2019The Nigerian Field, 70 (1), 51 ...
Okonta, A A, Ogunbor, A O
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Chromosomes of Gyraulus circumstratius, a Freshwater Snail
Nature, 1960POLYPLOIDY is relatively scarce in the animal kingdom, and is apparently almost entirely confined to those species in which reproduction is partheno-genetic, hermaphroditic or clonal1. Such animals usually do not have a heterogametous sex-determining mechanism to be disturbed by polyploidy.
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Monoamines and their metabolites in the freshwater snail Biomphalaria glabrata
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2000Metabolism of the major monoamines and their functions were studied in the freshwater snail Biomphalaria glabrata. In both juvenile and adult snails, the plasma (cell-free hemolymph) appears to act as a reservoir for most of these monoamines and their metabolites including among others, L-dopa and dopamine as major constituents.
V, Santhanagopalan, T P, Yoshino
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The Inheritance of Albinism in a Freshwater Snail, Physa heterostropha
Journal of Heredity, 1992Complementation tests revealed that albinism in four laboratory strains of Physa (Physella) heterostropha pomilia resulted from two recessive, nonallelic genes. F2 dihybrid progeny displayed the 9:7 ratio classically associated with reciprocal recessive epistasis between unlinked loci.
R T, Dillon, A R, Wethington
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The Land and Freshwater Snails of Campeche
Bulletin of the Florida Museum of Natural History, 1967This review of the land and freshwater snails of Campeche, Mexico, records 59 species and subspecies of snails including 47 terrestrial and 12 acquatic forms; 21 are recorded for the first time from the state. Miradiscops haplocochlion is described as new; 11 previously recognized taxa are placed in synonymy.
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On the underwater weights of freshwater snails
Zeitschrift f�r Vergleichende Physiologie, 19631. Under laboratory conditions, the mantle cavities of Lymnaea stagnalis and Planorbarius corneus immediately after ventilation at the surface, contain enough air to make the animals buoyant. 2. Both species lose this buoyancy over the first three hours of submersion by a process reducing the gas volume. 3. The gas is used as
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The Freshwater Snails Of Taiwan (formosa).
1970PhD ; Zoology ; University of Michigan, Horace H. Rackham School of Graduate Studies ; http://deepblue.lib.umich.edu/bitstream/2027.42/188611/2/7021747 ...
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Bioconcentration ratio of diazinon by freshwater fish and snail
Bulletin of Environmental Contamination and Toxicology, 1978The bioconcentration ratios of diazinon from water by freshwater fishes were generally larger than that of crayfish and snails. Among fishes, the bioconcentration ratio of diazinon by topmouth gudgeon was the highest value, 152 being average. However, elimination of diazinon from fish body was linearly rapid.
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Habituation in a freshwater snail (Limnaea stagnalis)
Animal Behaviour, 1971Abstract Withdrawal responses were elicited by mechanical or visual stimuli and recorded both automatically and by observation. With stimulus repetition both response amplitude and frequency decline but the latency remains about the same: these effects are short lived.
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The chemosensory spectrum of freshwater snails
1996In this paper we review the present information on the chemosensory spectrum of freshwater snails with particular reference to our study on Planorbarius. By comparing our results with other data from literature, it is evident that different species have different chemosensory spectra as a function of their ecological adaptation.
D. Sonetti +3 more
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