The Role of Environmental Selection in Intraspecific Divergence of Mate Recognition Signals in the Cricket Frog, Acris crepitans

Evolution ◽  
1990 ◽  
Vol 44 (7) ◽  
pp. 1869 ◽  
Author(s):  
Michael J. Ryan ◽  
Reginald B. Cocroft ◽  
Walter Wilczynski
Keyword(s):  
Mate Recognition ◽  
Intraspecific Divergence ◽  
Acris Crepitans ◽  
Environmental Selection ◽  
Cricket Frog

scholarly journals THE ROLE OF ENVIRONMENTAL SELECTION IN INTRASPECIFIC DIVERGENCE OF MATE RECOGNITION SIGNALS IN THE CRICKET FROG,ACRIS CREPITANS

Evolution ◽  
1990 ◽  
Vol 44 (7) ◽  
pp. 1869-1872 ◽  
Author(s):  
Michael J. Ryan ◽  
Reginald B. Cocroft ◽  
Walter Wilczynski
Keyword(s):  
Mate Recognition ◽  
Intraspecific Divergence ◽  
Acris Crepitans ◽  
Environmental Selection ◽  
Cricket Frog

Mate recognition in the two-spot ladybird beetle, Adalia bipunctata: role of chemical and behavioural cues

1998 ◽  
Vol 44 (12) ◽  
pp. 1163-1171 ◽  
Author(s):  
J.-L Hemptinne† ◽  
G Lognay‡ ◽  
A.F.G Dixon
Keyword(s):  
Mate Recognition ◽  
Adalia Bipunctata ◽  
Ladybird Beetle

Evidence for a Daily Rhythm of Heat Resistance in the Cricket Frog, Acris crepitans

Copeia ◽  
1969 ◽  
Vol 1969 (4) ◽  
pp. 852 ◽  
Author(s):  
Donald G. Dunlap
Keyword(s):  
Heat Resistance ◽  
Daily Rhythm ◽  
Acris Crepitans ◽  
Cricket Frog

Geographic variation of lactate dehydrogenase in the cricket frog, Acris crepitans

1969 ◽  
Vol 3 (4) ◽  
pp. 335-341 ◽  
Author(s):  
Stanley N. Salthe ◽  
Eviatar Nevo
Keyword(s):  
Lactate Dehydrogenase ◽  
Geographic Variation ◽  
Acris Crepitans ◽  
Cricket Frog

The role of host-plant odour and sex pheromones in mate recognition in the aphid Cryptomyzus

1992 ◽  
pp. 119-121 ◽  
Author(s):  
J. Adriaan Guldemond ◽  
A. F. G. Dixon ◽  
J. A. Pickett ◽  
L. J. Wadhams ◽  
C. M. Woodcock
Keyword(s):  
Host Plant ◽  
Sex Pheromones ◽  
Mate Recognition

scholarly journals Morphological stasis in the first myxomycete from the Mesozoic, and the likely role of cryptobiosis

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jouko Rikkinen ◽  
David A. Grimaldi ◽  
Alexander R. Schmidt
Keyword(s):  
Evolutionary History ◽  
Molecular Data ◽  
Fruiting Bodies ◽  
Ecological Adaptations ◽  
Environmental Selection ◽  
Morphological Stasis ◽  
Ancient Lineage ◽  
History Of ◽  
Spore Mass

AbstractMyxomycetes constitute a group within the Amoebozoa well known for their motile plasmodia and morphologically complex fruiting bodies. One obstacle hindering studies of myxomycete evolution is that their fossils are exceedingly rare, so evolutionary analyses of this supposedly ancient lineage of amoebozoans are restricted to extant taxa. Molecular data have significantly advanced myxomycete systematics, but the evolutionary history of individual lineages and their ecological adaptations remain unknown. Here, we report exquisitely preserved myxomycete sporocarps in amber from Myanmar, ca. 100 million years old, one of the few fossil myxomycetes, and the only definitive Mesozoic one. Six densely-arranged stalked sporocarps were engulfed in tree resin while young, with almost the entire spore mass still inside the sporotheca. All morphological features are indistinguishable from those of the modern, cosmopolitan genus Stemonitis, demonstrating that sporocarp morphology has been static since at least the mid-Cretaceous. The ability of myxomycetes to develop into dormant stages, which can last years, may account for the phenotypic stasis between living Stemonitis species and this fossil one, similar to the situation found in other organisms that have cryptobiosis. We also interpret Stemonitis morphological stasis as evidence of strong environmental selection favouring the maintenance of adaptations that promote wind dispersal.

Agonistic Encounters in a Cricket Frog (Acris crepitans) Chorus: Behavioral Outcomes Vary with Local Competition and within the Breeding Season

Ethology ◽  
1999 ◽  
Vol 105 (4) ◽  
pp. 335-347 ◽  
Author(s):  
Sabrina Burmeister ◽  
Jay Konieczka ◽  
Walter Wilczynski
Keyword(s):  
Breeding Season ◽  
Behavioral Outcomes ◽  
Local Competition ◽  
Acris Crepitans ◽  
Cricket Frog ◽  
Agonistic Encounters

168 A NONINVASIVE, TRANSDERMAL ABSORPTION APPROACH FOR EXOGENOUS HORMONE INDUCTION OF SPAWNING IN THE NORTHERN CRICKET FROG, ACRIS CREPITANS: A MODEL FOR SMALL ENDANGERED AMPHIBIANS

2013 ◽  
Vol 25 (1) ◽  
pp. 232 ◽  
Author(s):  
W. E. Snyder ◽  
V. L. Trudeau ◽  
N. M. Loskutoff
Keyword(s):  
Pond Water ◽  
Critically Endangered ◽  
Ex Situ ◽  
Amphibian Conservation ◽  
Dopamine Antagonist ◽  
Exogenous Hormone ◽  
Transdermal Absorption ◽  
Acris Crepitans ◽  
Cricket Frog ◽  
Cricket Frogs

The World Conservation Union (IUCN) currently recognises Eleutherodactylus locustus from Puerto Rico and Plectrohyla acanthodes from Mexico and Guatemala as critically endangered, and they are recommended for ex situ breeding by several amphibian conservation organizations (e.g. AZA, ATAG, RCP, and AARK). Because of their very small and delicate bodies, conventional injectable methods developed for hormonally stimulating spawning in larger frogs and toads are undesirable, because this can result in trauma and injury. Recently, a protocol was developed for inducing spawning in frogs by co-injection of a gonadotropin-releasing hormone agonist (GnRHa) with metoclopramide-HCl (MET), a dopamine antagonist (Amphiplex; Trudeau et al. 2010 Rep. Biol. Endo. 8, 36). The goal of this study, therefore, was to determine the effectiveness of Amphiplex using 3 routes of exogenous treatments: (1) direct IP injection (0.4 µg of GnRHa + 10 µg of MET per gram of body weight), (2) injection into prey (1 µg of GnRHa + 25 µg of MET per insect) before feeding, and (3) a 60-min immersion in 10 mL of pond water containing 0.17 µg of GnRHa + 0.42 µg of MET per microliter. The northern cricket frog (Acris crepitans), a very common local species, was used as a model because it is also small, delicate, and difficult to handle. A total of 110 cricket frogs were caught locally either late or after their normal breeding season, sexed as males or females, and segregated into a control group that was housed similarly ex situ but not exposed to Amphiplex and the 3 Amphiplex experimental groups. The frogs were monitored daily for egg production and behavioural amplexus (potential spermiation). The results are summarised as follows (Table 1): of the frogs exposed to the Amphiplex-supplemented pond water, 84% of 38 females deposited eggs, and 6 pairs were observed in amplexus (indicating spermiation). Approximately 27% of more than 2242 eggs were found to develop cleavage divisions, and tadpoles were first observed in vitro after 4 days. In conclusion, to our knowledge this is the first report indicating that transdermal absorption of a reproductive hormone cocktail (e.g. Amphiplex) may serve in the application of assisted reproductive technology to increase the populations of critically endangered amphibians such as frogs and toads that may be too small or delicate for conventional methods of exogenous hormone treatments that require handling and injections. Table 1.Treated northern cricket frogs

Terrestrial hibernation in the northern cricket frog, Acris crepitans

1999 ◽  
Vol 77 (8) ◽  
pp. 1240-1246 ◽  
Author(s):  
Jason T. Irwin ◽  
Jon P. Costanzo ◽  
Richard E. Lee, Jr.
Keyword(s):  
Acris Crepitans ◽  
Cricket Frog

Effective Breeding Size and the Adaptive Significance of color Polymorphism in the Cricket Frog (Acris crepitans) in Illinois, U. S. A.

1984 ◽  
Vol 5 (2) ◽  
pp. 101-107 ◽  
Author(s):  
Robert H. Gray
Keyword(s):  
Field Study ◽  
Color Polymorphism ◽  
Adaptive Significance ◽  
Population Characteristics ◽  
Color Morph ◽  
Effective Population ◽  
Acris Crepitans ◽  
Color Morphs ◽  
Population Breeding ◽  
Cricket Frog

A three year field study was conducted to investigate the adaptive significance of color polymorphism in the cricket frog, Acris crepitans, in Illinois, U. S. A. Effective population breeding sizes were determined at seven different locations. Population characteristics in Illinois were compared with those from Texas. The three color morphs appear to be of equal survival value for cricket frogs in Illinois. Although strong selection may occur in Texas, small effective breeding sizes suggest that chance plays a major role in determining color morph frequencies in Illinois.

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