scholarly journals A comprehensive phylogeography of the widespread pond snail genus Radix revealed restricted colonization due to niche conservatism

2021 ◽  
Author(s):  
Takumi Saito ◽  
Takahiro Hirano ◽  
Bin Ye ◽  
Larisa Prozorova ◽  
Mohammad Shariar Shovon ◽  
...  
Keyword(s):  
Niche Conservatism ◽  
Pond Snail

Ecological niche conservatism shapes the distributions of lichens

Preslia ◽  
2017 ◽  
Vol 89 (1) ◽  
pp. 63-85 ◽  
Author(s):  
Z. Fačkovcová ◽  
Senko ◽  
M. Svitok ◽  
A. Guttová
Keyword(s):  
Ecological Niche ◽  
Niche Conservatism

Methodical guidelines on the control of fasciolosis in cattle in the Kaluga region

2018 ◽  
Vol 12 (2) ◽  
pp. 108-116
Author(s):  
A.M. Ustinov ◽  
R.T. Safiullin ◽  
R.R. Safiullin
Keyword(s):  
Infected Animal ◽  
Fasciola Hepatica ◽  
Adult Stage ◽  
Federal District ◽  
Dosage Forms ◽  
Pond Snail ◽  
Meat Processing ◽  
Processing Plants ◽  
Causative Agents ◽  
Kaluga Region

Information is provided on the causative agents of fasciolosis and the developmental biology of Fasciola hepatica. Fasciolosis of cattle is widespread in the conditions of the Kaluga Region and the Central Federal District on farms of different forms of ownership. The greatest number of F. hepatica eggs in 1 g of feces in cattle is established in JSC "Iskra" - 175,4 specimens, the lowest - in the samples from cows from private farms - 87,6 sp. At the opening slaughter of cattle at meat processing plants region and slaughterhouses invasion of their fasciolae was 34.8%. The average number fascial one infected animal was 32.1 specimens, including adult - and larval specimens of 25.2 and 6.9 copies At veterinary-sanitary expertise and helminthological autopsy of the liver, gallbladder and bile ducts installed year-round invasion fasciolae mainly in the adult stage. Young animals of the current year are infected with fasciola in the pasture massly in August-September, and the extent of invasion in November was 4.3%, for winter-stabling months an average of 12.6%, in March - 17.9% and in April after de-worming - 5.9%.The data obtained in the study of the distribution of the small pond has shown that in the Kaluga region these mollusks are widespread. In this case, the invasion of the small pond snail by larval forms of fasciolae in different years has its own peculiarities, which are influenced by climatic factors.The different dosage forms of clozantel - Rolenol and Santel and Genamectin with mixed fascioliasis and hypodermatosis of bovine in the recommended dose against subcutaneous gadfly larvae - provided 100% efficacy. The tested dosage forms of clozantel are similar in effectiveness against subcutaneous gadfly larvae (EE-100%) and fasciol (EE-95 and 90%, IE-97.4 and 96.3%).The therapeutic and economic effectiveness of complex domestic preparations of Helmicide and Fascocida in spontaneous fascioliasis of cattle is studied.

The Intrinsic Rate of Natural Increase in a Pond Snail (Physa gyrina Say)

1954 ◽  
Vol 88 (842) ◽  
pp. 353-359 ◽  
Author(s):  
Robert M. DeWitt
Keyword(s):  
Intrinsic Rate ◽  
Natural Increase ◽  
Pond Snail ◽  
Physa Gyrina

scholarly journals Have Niche, Will Travel. New Means of Linking Diet and Ecomorphology Reveals Niche Conservatism in Freshwater Cottoid Fishes

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
T J Buser ◽  
D L Finnegan ◽  
A P Summers ◽  
M A Kolmann
Keyword(s):  
Niche Conservatism ◽  
Freshwater Species ◽  
Evolutionary Transitions ◽  
Adaptive Diversification ◽  
Functional Aspects ◽  
Ecological Evolution ◽  
Jaw Apparatus ◽  
Cottoid Fishes ◽  
Freshwater Habitats ◽  
Dietary Niche

Synopsis Evolutionary transitions between habitats have been catalysts for some of the most stunning examples of adaptive diversification, with novel niches and new resources providing ecological opportunity for such radiations. In aquatic animals, transitions from saltwater to freshwater habitats are rare, but occur often enough that in the Neotropics for example, marine-derived fishes contribute noticeably to regional ichthyofaunal diversity. Here, we investigate how morphology has evolved in a group of temperate fishes that contain a marine to freshwater transition: the sculpins (Percomorpha; Cottoidea). We devised a novel method for classifying dietary niche and relating functional aspects of prey to their predators. Coupled with functional measurements of the jaw apparatus in cottoids, we explored whether freshwater sculpins have fundamentally changed their niche after invading freshwater (niche lability) or if they retain a niche similar to their marine cousins (niche conservatism). Freshwater sculpins exhibit both phylogeographical and ecological signals of phylogenetic niche conservatism, meaning that regardless of habitat, sculpins fill similar niche roles in either saltwater or freshwater. Rather than competition guiding niche conservatism in freshwater cottoids, we argue that strong intrinsic constraints on morphological and ecological evolution are at play, contra to other studies of diversification in marine-derived freshwater fishes. However, several intertidal and subtidal sculpins as well as several pelagic freshwater species from Lake Baikal show remarkable departures from the typical sculpin bauplan. Our method of prey categorization provides an explicit, quantitative means of classifying dietary niche for macroevolutionary studies, rather than relying on somewhat arbitrary means used in previous literature.

scholarly journals Niche Conservatism and the Future Potential Range of Epipactis helleborine (Orchidaceae)

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e77352 ◽  
Author(s):  
Marta Kolanowska
Keyword(s):  
Niche Conservatism ◽  
Potential Range ◽  
The Future ◽  
Future Potential ◽  
Epipactis Helleborine

scholarly journals Differential speciation rates, colonization time and niche conservatism affect community assembly across adjacent biogeographical regions

2021 ◽  
Author(s):  
Ronildo A. Benício ◽  
Diogo B. Provete ◽  
Mariana L. Lyra ◽  
Jani Heino ◽  
Célio F. B. Haddad ◽  
...  
Keyword(s):  
Community Assembly ◽  
Niche Conservatism ◽  
Speciation Rates ◽  
Biogeographical Regions ◽  
Colonization Time

Forced Convection Past a Rotating Sphere: Modeling Oxygen Transport to a Pond Snail Embryo

2013 ◽  
Vol 135 (12) ◽  
Author(s):  
D. A. Nield ◽  
A. V. Kuznetsov
Keyword(s):  
Forced Convection ◽  
Quantitative Study ◽  
Oxygen Transport ◽  
Oxygen Transfer ◽  
Pond Snail ◽  
Gaseous Exchange ◽  
Helisoma Trivolvis ◽  
Rotating Sphere

Helisoma trivolvis pond snail embryos are known for their rotation, which is induced by beating of cilia at the embryo's surface. A common hypothesis links this behavior to enhancing oxygen transfer to the embryo's surface. In this paper, this hypothesis is quantified, and the effect of the rotation on the supply of oxygen to an embryo, which is approximately spherical in shape, is studied. To the best of our knowledge, this is the first research presenting a quantitative study on the effect of an embryo's rotation on facilitating gaseous exchange between the embryo and the environment.

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