Allozyme, chromosomal and morphological variability in the Litoria lesueuri species group (Anura : Hylidae), including a description of a new species

2004 ◽  
Vol 52 (1) ◽  
pp. 1 ◽  
Author(s):  
S. C. Donnellan ◽  
M. J. Mahony
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Morphological Variability ◽  
Allozyme Variation ◽  
Species Group ◽  
Separate Species ◽  
Morphometric Variation ◽  
Genetic Groups ◽  
Eastern Australia

Allozyme variation at 36 loci was screened in 179 individuals of the Litoria lesueuri species group from 33 locations from across the species' range in eastern Australia. We identified three genetic groups, with discrete and disjunct distributions, that we consider to be separate species. The northernmost group, L.�jungguy, sp. nov., had a distinctive standard and C-band karyotype, while the karyotypes of the two southern groups, L. lesueuri (Duméril & Bibron, 1841) and L. wilcoxii Gunther, 1864, differed only in minor details of their C-band patterns. Stepwise discriminant function analysis of morphometric variation among 13 meristic variables was able to discriminate L. lesueuri and L. wilcoxii in 100% of cases but discrimination between L. wilcoxii and L. jungguy was less successful, with 75% and 56% of each group respectively being correctly classified. Locations with inter-group hybrids were identified in the Australian Capital Territory, mid-east Queensland and two localities in far north Queensland. However, each of the groups has a large geographic range within which there was relative allozyme and karyotype uniformity. On the basis of the genetic data, each group is herein elevated to species status. Existing types were assigned to their respective genetic groups on the basis of a discriminant function analysis. Formal taxonomic accounts are provided. The closely related L. booroolongensis (Moore, 1961), sole member of the L.�booroolongensis species group, differed allozymically from all three species of the L. lesueuri species group but only from the northern species in its karyotype. Small genetic distances between L.�booroolongensis and members of the L. lesueuri species group indicate a close relationship for the two species groups.

The role of within-species differentiation in macroevolution of Chesapeake Group bivalves

Paleobiology ◽  
1983 ◽  
Vol 9 (3) ◽  
pp. 261-268 ◽  
Author(s):  
Patricia H. Kelley
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Species Differences ◽  
Function Analysis ◽  
Rank Correlation ◽  
Species Differentiation ◽  
Separate Species ◽  
Geographic Populations ◽  
Correlation Techniques

Discriminant function analysis is used to examine the role of within-species differentiation in macroevolution of four Miocene bivalve genera. According to the punctuational model, macroevolution is decoupled from microevolution; within-species trends may be unrelated to between-species differences. The reductionist alternative suggests that intraspecific (primarily geographic) differentiation is the basis of macroevolution. If macroevolution depends on within-species differentiation, discriminant function analysis should separate interspecific and intraspecific populations of a genus using the same set of characters.Chesapecten macroevolution apparently involved within-species differentiation. Shell length, height, and posterior auricle length differentiate geographic populations within species as well as interspecific populations. Results for Astarte, Anadara, and Eucrassatella are more consistent with the punctuational model. Characters which readily separate species of a genus are much less successful at differentiating intraspecific populations. Rank correlation techniques indicate that, for all three genera, the order of importance of characters in interspecific discrimination is not significantly related to their order in intraspecific discrimination. Decoupling of macroevolution from microevolution is implied for these taxa.

The Occurrence of Distinct Morphotypes within a Population of Fucus Spiralis

1998 ◽  
Vol 78 (3) ◽  
pp. 1003-1006 ◽  
Author(s):  
C.I.H. Anderson ◽  
G.W. Scott
Keyword(s):  
Discriminant Function ◽  
Species Distribution ◽  
Discriminant Function Analysis ◽  
Environmental Gradients ◽  
Function Analysis ◽  
Morphological Variability ◽  
Single Population ◽  
Fucus Spiralis ◽  
High Degree

Discriminant function analysis was used to identify two morphotypes of Fucus spiralis (Phaeophyta: Fucales), F. spiralis forma spiralis and F. spiralis forma nanus, within a single population. Evidence was found that they are true formae, not extremes of a range of types produced in response to environmental gradients. Forma spiralis tends to be larger than forma nanus, and to dominate the lower part of the species distribution on the shore. However, size alone appears insufficient to reliably separate the two formae given their high degree of morphological variability.

scholarly journals Variasi morfometrik tiga jenis kepiting biola jantan (Decapoda: Ocypodidae) yang ditangkap di Kawasan Mangrove Jaboi, Pulau Weh, Indonesia

DEPIK ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 464-470
Author(s):  
Djamani Rianjuanda ◽  
Ilham Zulfahmi ◽  
Kavinta Melanie ◽  
Chairun Nisa ◽  
Epa Paujiah ◽  
...  
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Fiddler Crab ◽  
Function Analysis ◽  
Sediment Type ◽  
Suitable Habitat ◽  
Research Station ◽  
Crab Species ◽  
Morphometric Variation ◽  
Mangrove Area

The objective of the present study was to analyze the morphometrics variation of three male fiddler crab species collected from Jaboi mangrove area, Weh island, Indonesia. A total of 50 male fiddler crab species from each species (Tubuca dussumieri, Gelasimus vocans and Austruca perplexa) were collected from three research station used digging method and direct capture. The number of morphological characters that measured was 18 characters. The water quality and soil parameters observed were salinity, pH of water and soil, water temperature, C-organic concentration in substrate and sediment type. ANOVA (confidence interval of 95%) and Discriminant Function Analysis was used for analizing the morphometric variation beetwen species. The results showed that the mangrove area of Jaboi, Weh island provides a suitable habitat characteristic for male fiddler crab. Tubuca dussumieri and Gelasius vocans tend distributed in the area with sediment type of mud, while Austruca perplexa tends distributed in the area with sediment type of sand. The result of statistical analysis showed that there were ten separate characters between Tubuca dussumieri and Gelasimus vocans, 17 separate characters between Tubtubuca dussumieri and Austruca perplexa, and 13 separate characters between Gelasimus vocans and Austruca perplexa. Morphometrics variation can be observed in the carapace, propodus, mouth, walking legs, and eye stalks.Keywords:Morphometric variationCarapacs lengthBig propudusSmall propudusWalking legsABSTRAKPenelitian ini bertujuan untuk mengetahui variasi morfometrik tiga jenis kepiting biola jantan yang ditangkap di kawasan mangrove Jaboi Pulau Weh, Indonesia. Sebanyak 50 ekor kepiting biola jantan dari masing masing jenis (Tubuca dussumieri, Gelasimus vocans dan Austruca perplexa) dikoleksi dari tiga titik stasiun penelitian menggunakan metode digging dan pengambilan langsung. Jumlah karakter morfometrik kepiting jantan yang diukur adalah sebanyak 18 karakter. Parameter kualitas air dan tanah yang diukur meliputi salinitas, pH air, pH tanah, suhu air, kandungan C-organik subtrat dan tipe sedimen. Analisis terhadap data morfometrik dilakukan menggunakan ANOVA (selang kepercayaan 95%) dan Discriminant Function Analysis. Hasil penelitian mengungkapkan bahwa kawasan mangrove Jaboi, Pulau Weh memiliki karakteristik habitat yang sesuai bagi kepiting biola. Tubuca dussumieri dan Gelasimus vocans cenderung terdistribusi pada wilayah dengan persentase tipe sedimen lumpur yang lebih tinggi, sementara Austruca perplexa cenderung terdistribusi pada wilayah dengan persentase tipe sedimen pasir yang lebih tinggi. Hasil analisis statistik menunjukkan bahwa terdapat 10 karakter pembeda antara Tubuca dussumieri dengan Gelasimus vocans, 17 karakter pembeda antara Tubtubuca dussumieri dengan Austruca perplexa dan 13 karakter pembeda antara Gelasimus vocans dengan Austruca perplexa. Variasi morfometrik tersebut dapat terlihat pada bagian karapas, capit, mulut, kaki gerak dan tangkai mata.Kata kunci:Variasi morfometrikPanjang karapasCapit besarCapit kecilKaki gerak

Diagnoses Generated by Numerical Taxonomic Methods Applied to Standard Blood Variables

1980 ◽  
Vol 19 (04) ◽  
pp. 205-209
Author(s):  
L. A. Abbott ◽  
J. B. Mitton
Keyword(s):  
Liver Cirrhosis ◽  
Renal Disease ◽  
Principal Components Analysis ◽  
Discriminant Function ◽  
Principal Components ◽  
Discriminant Function Analysis ◽  
Chronic Renal Disease ◽  
Function Analysis ◽  
Infectious Hepatitis ◽  
Components Analysis

Data taken from the blood of 262 patients diagnosed for malabsorption, elective cholecystectomy, acute cholecystitis, infectious hepatitis, liver cirrhosis, or chronic renal disease were analyzed with three numerical taxonomy (NT) methods : cluster analysis, principal components analysis, and discriminant function analysis. Principal components analysis revealed discrete clusters of patients suffering from chronic renal disease, liver cirrhosis, and infectious hepatitis, which could be displayed by NT clustering as well as by plotting, but other disease groups were poorly defined. Sharper resolution of the same disease groups was attained by discriminant function analysis.

scholarly journals Description of Echolocation Call Parameters for Urban Bats in Vietnam as a Step Towards a More Integrated Acoustic Monitoring of Urban Wildlife in Southeast Asia

Diversity ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 18
Author(s):  
Long Kim Pham ◽  
Bang Van Tran ◽  
Quy Tan Le ◽  
Trung Thanh Nguyen ◽  
Christian C. Voigt
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Quantitative Description ◽  
Southeast Asian ◽  
Asian Countries ◽  
Echolocation Call ◽  
Echolocation Calls ◽  
Pilot Work ◽  
Southeast Asian Countries

This study is the first step towards more systematic monitoring of urban bat fauna in Vietnam and other Southeast Asian countries by collecting bat echolocation call parameters in Ho Chi Minh and Tra Vinh cities. We captured urban bats and then recorded echolocation calls after releasing in a tent. Additional bat’s echolocation calls from the free-flying bats were recorded at the site where we captured bat. We used the obtained echolocation call parameters for a discriminant function analysis to test the accuracy of classifying these species based on their echolocation call parameters. Data from this pilot work revealed a low level of diversity for the studied bat assemblages. Additionally, the discriminant function analysis successfully classified bats to four bat species with an accuracy of >87.4%. On average, species assignments were correct for all calls from Taphozous melanopogon (100% success rate), for 70% of calls from Pipistrellus javanicus, for 80.8% of calls from Myotis hasseltii and 67.3% of calls from Scotophilus kuhlii. Our study comprises the first quantitative description of echolocation call parameters for urban bats of Vietnam. The success in classifying urban bats based on their echolocation call parameters provides a promising baseline for monitoring the effect of urbanization on bat assemblages in Vietnam and potentially also other Southeast Asian countries.

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