Topic
Pool frog
About: Pool frog is a research topic. Over the lifetime, 33 publications have been published within this topic receiving 854 citations. The topic is also known as: Pool frog.
Papers
TL;DR: Connectivity is concluded to be a key to metapopulation persistence not just in terms of recolonization, but also for populations fluctuate more greatly in size than predicted from demographic models which have been commonly referred to.
Abstract: Local extinction along the intrinsic isolation gradient within metapopulations is reviewed with particular referenceto a study of the pool frog ( Rana lessonae ) on the northern periphery of its geographical range. As inthe pool frog, many other different taxa show significantly increased extinction probabilities with increased interpopulationdistance. Present data imply that the relative impact of demographic and genetic factors in such stochastic extinctionsdepends on the genetic history of the metapopulation; data also imply that populations fluctuate more greatly in size thanpredicted from demographic models which have been commonly referred to. By mitigating such fluctuations and inbreeding, andcompensating for emigration, immigration undoubtedly “rescues” local populations from extinction. In this way, andnot just in terms of recolonization, connectivity is concluded to be a key to metapopulation persistence. Implications forconservation are also presented.
304 citations
TL;DR: It is concluded that long-term strong fluctuations in population size caused by reporductive failure in cold years have contributed more to the low genetic variability of the Swedish pool frogs than could a single founder event due to a recent introduction by man.
Abstract: Genetic variation in an isolated northern metapopulation of the pool frog (Rana lessonae) in Sweden was compared to that of Central European populations using enzyme electrophoresis and literature data. Of the 31 loci scored, two (EST-2 andIDH-2) were polymorphic while no variation occurred in seven of the eight loci which are polymorphic in Central European populations.
50 citations
TL;DR: Both genetic studies and bioacoustic and archaeozoo-logicalings support native status for Norfolk pool frogs and have prompted a programme for re-establishing thenorthern clade in England.
Abstract: , has historically been considered an introduction into Britain, with Italy the most likelysource. Recently, the possibility of native status for a Norfolk pool frog population was raised. We used random ampli-fied DNA (RAPD) analyses to clarify the status issue. Nine arbitrarily designed primers detected 160 polymorphismsin 174 pool frogs from 11 European locations. Polymorphism levels varied widely, being lowest in the northern pop-ulations and highest in the south. As with many isolated populations, the peninsular and insular populations of Swe-den, Norway and Britain showed relatively little polymorphism. Principal component and cluster analysis showedclear geographical groupings. The Norfolk, Norwegian and Swedish individuals formed a closely related group - anorthern clade, substantiating native status for the Norfolk population, which, interestingly, had idiosyncratic fea-tures suggestive of a distinctive evolutionary history. Phylograms constructed from RAPD data were consistent withan unexpected postglacial colonization route, in which the northern clade derived from migration out of Italy, viaHungary and Poland, though cryptic glacial refugia in Eastern Europe are an alternative explanation. Our RAPDanalyses concur with a parallel microsatellite investigation. Both genetic studies and bioacoustic and archaeozoo-logical findings support native status for Norfolk pool frogs and have prompted a programme for re-establishing thenorthern clade in England. © 2005 The Linnean Society of London, Biological Journal of the Linnean Society , 2005,85, 41–51.
40 citations
TL;DR: A high degree of convergence among the genetic and bioacoustic investigations demonstrated that the potentially native UK pool frogs were closely related to Scandinavian frogs, thus ruling out introductions from further south as a potential origin.
Abstract: Introduced species often pose serious threats to biodiversity, but occasionally confusion arises as to whether a species really is introduced or is in fact an overlooked native. A recent UK conservation dilemma has centred on the status of the pool frog Rana lessonae. This species has been the subject of documented introductions from central and southern Europe since the early 1800s, the accepted position being that all UK R. lessonae populations are descended from these introductions. However, a closer examination of early UK literature sources, and recent discoveries of isolated, native R. lessonae populations in Sweden and Norway, led some herpetologists to question whether the species was in fact present as a native at some locations prior to the introductions. Research was initiated along four major lines of enquiry: genetic, bioacoustic, archaeozoological and archival. A high degree of convergence among the genetic and bioacoustic investigations demonstrated that the potentially native UK pool frogs were closely related to Scandinavian frogs, thus ruling out introductions from further south as a potential origin. Subfossil evidence of pool frogs was found from ca. 1000 years before present, demonstrating that the species occurred in the UK prior to known introductions. Archival sources produced no historical support for introductions from northern Europe. The postglacial history inferred for these northern populations is consistent with the known climatic and geographical conditions. Taken together, the evidence for the native status of the pool frog is compelling, and furthermore the UK population appears to be part of a distinct northern clade.
31 citations
TL;DR: Thermal preference in the pool frog Rana lessonae : impact on the reproductive behaviour of a northern fringe population and how this affects the population's reproductive behaviour is studied.
Abstract: Thermal preference in the pool frog Rana lessonae : impact on the reproductive behaviour of a northern fringe population
27 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2020 | 4 |
| 2019 | 3 |
| 2018 | 3 |
| 2016 | 1 |
| 2014 | 2 |