scholarly journals The Second Example of Metamorphosis of the Medusa from the intermedia Form to the Southern Form in Eutima japonica (Leptomedusae, Eirenidae)

1993 ◽  
Vol 36 (1-2) ◽  
pp. 95-97 ◽  
Author(s):  
Shin Kubota
Keyword(s):  
Southern Form

Conservation Genetics of Corroboree Frogs, Pseudophryne-Corroboree Moore (Anura, Myobatrachidae) - Population Subdivision and Genetic-Divergence

1991 ◽  
Vol 39 (3) ◽  
pp. 285 ◽  
Author(s):  
WS Osborne ◽  
JA Norman
Keyword(s):  
Genetic Divergence ◽  
Conservation Management ◽  
Geographic Distance ◽  
Genetic Distances ◽  
Population Subdivision ◽  
Southern Form ◽  
Eastern Australia ◽  
Geographic Populations ◽  
Taxonomic Implications ◽  
Growth Abnormalities

Reproductive compatibility and population genetic structure were examined in the corroboree frog, Pseudophryne corroboree, a species restricted to montane and subalpine environments in south-eastern Australia. The species comprises three geographic populations, represented by two morphological forms. Hybridisation experiments showed that the allopatric populations are interfertile, although crosses between the Snowy Mountains population (southern form) and each of the two northern populations (northern form) resulted in a significantly higher number of tadpoles with growth abnormalities. An electrophoretic examination of metamorphlings indicated that there was considerable genetic divergence between the two forms, with several loci approaching fixation of alternate alleles. The Snowy Mountains population also had substantially reduced levels of genetic variation compared to the two northern populations. Although genetic distances generally correlate with geographic distance, the genetic differences between the northern and southern populations form a pronounced step, not explicable by geographic distance alone. These findings have taxonomic implications which should be taken into account when considering the conservation management of this uncommon species.

Geographical Variation in Corroboree Frogs, Pseudophryne Corroboree Moore (Anura: Myobatrachidae): a Reappraisal Supports Recognition of P-Pengilleyi Wells &Wellington

1996 ◽  
Vol 44 (6) ◽  
pp. 569 ◽  
Author(s):  
WS Osborne ◽  
RA Zentelis ◽  
M Lau
Keyword(s):  
Morphological Characters ◽  
Colour Pattern ◽  
Separate Species ◽  
Advertisement Calls ◽  
Form Analysis ◽  
Southern Form ◽  
Mean Size ◽  
The Mean ◽  
One Year ◽  
Breeding Seasons

The extent of divergence in morphology and colour-pattern between allopatric populations of the corroboree frog, Pseudophyrne corroboree, was assessed over three breeding seasons by examination of eggs, tadpoles and adults throughout the distributional range of the species. Advertisement calls of individuals from each of the populations also were recorded and analysed. The mean size of adults was found to vary considerably between years; however, within any one year individuals from the Snowy Mountains (southern form) were significantly larger than individuals from the Brindabella Range and Fiery Range (northern form), with the differences apparently not simply related to environmental influences. Multivariate analysis of quantitative morphological characters and colour-pattern separated the frogs into two distinct geographic groups corresponding with the northern form and southern form. Analysis of advertisement calls indicated that there were slight differences in the structure of the calls of the two forms, with the main differences being in call duration and number of pulses. These results, combined with the previously described genetic differences, support their recognition as separate species. It is recommended that the name P. corroboree be restricted to the southern form and that the northern form be referred to as P. pengilleyi Wells & Wellington.

Molecular Phylogeny of Dermacentor parumapertus (Acari: Ixodidae) from Two Locations Within Its Geographical Range

2019 ◽  
Vol 56 (4) ◽  
pp. 979-983 ◽  
Author(s):  
J Santos Portugal ◽  
Michelle Allerdice ◽  
Gail M Moraru ◽  
Jonas King ◽  
Christopher D Paddock ◽  
...  
Keyword(s):  
United States ◽  
Mitochondrial Dna ◽  
Dna Sequences ◽  
Western United States ◽  
Separate Species ◽  
Mtdna Coi ◽  
West Texas ◽  
Southern Form ◽  
Different Populations ◽  
Two Populations

Abstract Dermacentor parumapertus Neumann (Acari: Ixodidae) is a rather obscure tick found on jackrabbits in the western United States and parts of Canada and Mexico. Specimens from the northern part of their range are consistently different morphologically from ones found in southern and eastern parts of their range (particularly west Texas), leading some researchers to declare the southern form a variety or subspecies. This study examined field-collected adult D. parumapertus from two main locations—Utah and Texas—within its geographic distribution to ascertain the degree of genetic divergence in the two populations based upon both nuclear and mitochondrial DNA sequences. In total, 30 D. parumapertus were analyzed by PCR using both mtDNA and nDNA genes, and one D. nitens was included for comparison. Trees were constructed for all mtDNA genes individually, as well as after concatenating mtDNA (COI, COII, 12S) and nDNA (2 ITS2 primers), respectively. All constructed trees were exported to FigTree v1.4.3 and TreeGraph v2.14.1–771 beta for visualization. The majority of the Utah and Texas populations of D. parumapertus separated molecularly in both mtDNA and nDNA trees; however, analysis with mtDNA genes showed that 3/13 (23%) of Utah tick specimens were removed molecularly from other specimens collected at the same location. Thus, there was not enough evidence to declare these two disparate and morphologically different populations as distinct and separate species.

Some Tests of the “Migration Hypothesis” for Anadromous Dolly Varden (Southern Form)

1995 ◽  
Vol 124 (3) ◽  
pp. 297-307 ◽  
Author(s):  
David R. Bernard ◽  
Kelly R. Hepler ◽  
J. Douglas Jones ◽  
Mary E. Whalen ◽  
Douglas N. McBride
Keyword(s):  
Dolly Varden ◽  
Southern Form

Megrim (Lepidorhombus Whiff-Iagonis) Populations in the English Channel and Approaches—Lactate Dehydrogenase and Glycerol-3-Phosphate Dehydrogenase Polymorphisms

1970 ◽  
Vol 50 (3) ◽  
pp. 801-818 ◽  
Author(s):  
P. R. Dando
Keyword(s):  
Bay Of Biscay ◽  
English Channel ◽  
Meristic Characters ◽  
Separate Species ◽  
The Third ◽  
The North ◽  
Southern Form ◽  
The North Sea ◽  
The Mediterranean ◽  
Glycerol 3 Phosphate Dehydrogenase

Two distinct forms of the megrim, Lepidorhombus whiff-iagonis (Walbaum), exist, a southern form which ranges from the Mediterranean to the British Isles and a northern form which ranges northwards from the north of Ireland and the North Sea (Richardson, 1860; Kyle, 1913; Furnstein, 1935; Dwivedi, 1964). Kyle and Richardson considered these forms to be separate species. The southern form of megrim extends into the English Channel with Start Point, 3° 40' W, the approximate eastern limit of its distribution (Cligny, 1905). However, this fish is common only at the western entrance of the Channel since it is abundant only in depths below loom (Dwivedi, 1964). Little is known of the separate megrim populations in the geographical range of the southern form. Studies of meristic characters indicate the existence of at least three populations, one in the Mediterranean and along the coast of Portugal, another in the Bay of Biscay and the third south of Ireland and in the entrance to the English Channel (Cligny, 1905; Dwivedi, 1964).

Organ weights of Pontoporia blainvillei and Sotalia guianensis (Cetacea: Pontoporiidae and Delphinidae)

2007 ◽  
Vol 87 (3) ◽  
pp. 825-828 ◽  
Author(s):  
Fernando C. Weber Rosas ◽  
Márcia R. de Oliveira ◽  
Gália Ely de Mattos
Keyword(s):  
Left Kidney ◽  
Relative Weight ◽  
Total Body Weight ◽  
The Body ◽  
Cetacean Species ◽  
Organ Weights ◽  
Sotalia Guianensis ◽  
Southern Form ◽  
Estuarine Dolphin ◽  
Pontoporia Blainvillei

Weights of kidneys, heart, lungs, liver, adrenals, eyes and tongue of the northern form of franciscana (Pontoporia blainvillei) and the estuarine dolphin (Sotalia guianensis) incidentally caught in fishing nets are presented and related to total body weight. Because of the smaller body size of the northern form of P. blainvillei, its actual organ weights were all smaller than those of the southern form reported in the literature. However, the lungs and adrenals of the northern form were proportionally greater than those of the southern form. The relative weight of the males' left kidney (N=18) and females' liver (N=17) were significantly heavier in this study than the proportions presented elsewhere in the literature for the southern form of the species. However, the females' kidneys, males' right kidney and males' liver did not differ between the northern and southern forms, and a larger number of individuals of both geographical forms should be analysed. The actual weights of the S. guianensis internal organs were all greater than those reported in the literature for S. fluviatilis. Additionally, the body-to-organ mass proportions of kidneys, heart and lungs of S. guianensis were also greater than those of S. fluviatilis. This study provides comparative data that can be used when examining the systematics of both species and provides a baseline for future examinations of the post-mortem conditions of these cetacean species.

Morphological and genetic distinction of Armases angustipes and A. miersii (Decapoda, Brachyura, Sesarmidae)

Crustaceana ◽  
2018 ◽  
Vol 91 (9) ◽  
pp. 1097-1106
Author(s):  
Murilo Z. Marochi ◽  
Setuko Masunari ◽  
Christoph D. Schubart
Keyword(s):  
South America ◽  
Museum Specimens ◽  
Morphological Similarity ◽  
The Bahamas ◽  
Western Atlantic ◽  
New Information ◽  
Southern Form ◽  
The Family ◽  
Morphological Distinction ◽  
Geographic Overlap

Abstract Among coastal crabs of the family Sesarmidae from the western Atlantic, there have been problems of misidentification and controversial reports of distribution, especially due to the morphological similarity and sympatric occurrence of some species. In order to clarify the morphological distinction between Armases angustipes and Armases miersii we here summarize morphological information of the two species and provide new information on the distribution of A. angustipes. In addition, museum specimens from the Bahamas assigned to A. angustipes were morphologically and genetically re-identified as A. miersii, questioning the occurrence of the former species in this archipelago. In this case, there would be no geographic overlap between the two species, with A. angustipes becoming the southern form, mostly restricted to South America. Further studies on the variability among populations of A. miersii and A. angustipes are needed.

Anti-Edema Effects of Brown Seaweed (Undaria pinnatifida) Extract on Phorbol 12-Myristate 13-Acetate-Induced Mouse Ear Inflammation

2009 ◽  
Vol 37 (02) ◽  
pp. 373-381 ◽  
Author(s):  
Mohammed Nurul Absar Khan ◽  
Seung-Je Yoon ◽  
Jae-Suk Choi ◽  
Nam Gyu Park ◽  
Hyung-Ho Lee ◽  
...  
Keyword(s):  
Methanol Extract ◽  
Undaria Pinnatifida ◽  
Brown Seaweed ◽  
Myristate Acetate ◽  
Maximal Level ◽  
Antipyretic Activity ◽  
Southern Form ◽  
Mouse Ear ◽  
Blade Section ◽  
Mouse Ear Edema

The brown seaweed Undaria pinnatifida (Harvey) Suringar is used in traditional medicine to treat fever, urination problems, lumps and swelling, and as a dietary supplement for post-childbirth women. We examined the anti-inflammatory activities of the seaweed. The methanol extract of the seaweed was active against mouse ear edema induced by phorbol myristate acetate (PMA), with an IC50 of 10.3 mg/ml. The extract reduced the edema to a half-maximal level when applied at the concentration of 40 mg/ml within 3 hours before or 2 hours after application of PMA. Extract taken from the blade section of the seaweed demonstrated the highest activity. The Northern form of U. pinnatifida was more active than the Southern form. In the analgesic test, the methanol extract suppressed the acetic acid-induced writhing response, with an IC50 of 0.48 g/kg body weight. The extract also demonstrated antipyretic activity in yeast-induced hyperthermic mice. Activity-related constituents were arachidonic, eicosapentaenoic, and stearidonic acids.

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