Studies on morphological variation in three barbin fishes (Cyprinidae:Barbinae) from different water areas of Manipur, India 

2017 ◽  
Author(s):  
Ch. Basudha ◽  
N. Sobita and N. Sushindrajit
Keyword(s):  
Fish Species ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Geographic Distance ◽  
Descriptive Statistics ◽  
Individual Species ◽  
P Value ◽  
Morphometric Characters ◽  
Morphological Variations ◽  
Puntius Sophore

A total of two hundred and seventy samples of three barbin fish species viz. Puntius chola, Puntius sophore and Pethia manipurensis (Cyprinidae: Barbinae) were investigated for morphometric variations from nine different water areas of Manipur. Twenty reliable morphometric characters were measured in each sample and evaluated with individual species and compared same in each study area by various standard analyses of difference to examine the implication of morphometric variations among populations. The species wise and population wise descriptive statistics viz., mean, standard variation, standard error of mean and the Principle Component Analysis (PCA) were carried out. Among the morphometric characters, Pre dorsal length (LPRD), Orbital length (LO) and Post orbital length (LPO) are insignificant having p value of 0.217, 0.259 and 0.215 respectively. The result of first three components by PCA were 69.62 % (1st), 77.627 % (2nd) and 83.214 % (3rd) which are sufficient to describe the variation among the populations. Discriminant function analysis of the first two functions of various measurements of morphometric characters of three fish species under study reveals that specimens of Puntius chola and P. sophore have high morphological variations whereas specimens of Pethia manipurensis have more or less variations among the populations. The detected phenotypical divergence between specimens revealed the fact of existing of morphologically separated stocks within the samples may imply as a possibility among the extent of phenotypic heterogeneity and the geographic distance among the populations. The present study reveals that the population of two species, Puntius chola and P. sophore are separate stock as their geographical sites whereas the population of P. manipurensis is same stock in spite of different geographical sites.

Stock delineation of the long-whiskered catfish, Sperata aor (Hamilton 1822), from River Ganga by using morphometrics

2019 ◽  
Vol 70 (1) ◽  
pp. 107 ◽  
Author(s):  
M. Afzal Khan ◽  
Aafaq Nazir
Keyword(s):  
Discriminant Function ◽  
Fish Species ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Mantel Test ◽  
Morphometric Measurements ◽  
Distance Measurements ◽  
Morphometric Characters ◽  
Sampling Locations ◽  
River Ganga

Long-term isolation of populations and interbreeding can lead to morphometric variations among fish populations. This study was conducted with the objective to delineate stock structure of Sperata aor on the basis of morphometric characters, using truss network of the fish body. In total, 407 S. aor samples were collected from the four sampling locations of the Ganga River, viz. Narora, Kanpur, Varanasi and Bhagalpur. In total, 28 truss distance measurements were created by joining 13 morphometric landmarks on the fish body. MANCOVA showed significant (P<0.001) morphological variance among the sampling locations for the target fish species. Univariate ANOVA showed significant (P<0.001) differences in each of the morphometric measurements among the fish from different sampling locations. Wilk’s lambda test of canonical discriminant function analysis showed significant (P<0.001) differences in morphometric measurements of the fish from all sampling locations. Discriminant function analysis using Jackknife (leave-one-out) cross-validation classification showed 87.5% correct classification of the individuals into their original populations. Mantel test showed an overall good correlation between the genetic and morphometric datasets in the selected fish species. The results of this study can be employed in formulating stock-specific management strategies for S. aor from River Ganga.

​Discrimination of Five Gobid Species (Family: Gobiidae) based on Otolith Morphometry

2021 ◽  
Author(s):  
Vikas Pathak ◽  
Rinchen N. Bhutia ◽  
Shashi Bhushan ◽  
Geetanjali Deshmukhe ◽  
A.K. Jaiswar
Keyword(s):  
Fish Species ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Allometric Growth ◽  
Fish Size ◽  
Sagittal Otolith ◽  
Shape Indices ◽  
Glossogobius Giuris ◽  
Species Specific ◽  
Boleophthalmus Dussumieri

Background: The fishes of family Gobiidae are one of the least studied fishes, especially for otolith structure. The otoliths were possess species specific features. Hence, traits of sagittal otolith of gobid species studied. Methods: Five gobid species Odontamblyopus roseus (Valenciennes, 1837), Trypauchen vagina (Bloch and Schneider, 1801), Glossogobius giuris (Hamilton, 1822), Parachaeturichthys polynema (Bleeker, 1853) and Boleophthalmus dussumieri (Valenciennes, 1837) were investigated by three methods including morphological, shape indices and step wise discriminant function analysis (SDFA). Result: Interrelationship between shape indices investigated, at 95% level of confidence (P less than 0.05), revealed that perimeter of P. polynema and area of T. vagina have isometric growth with their length (b = 3.0071, 2.90, respectively) and otolith area of B. dussumieri have positive allometric growth (b = 4.23077). SDFA, based on otolith morphometry, discriminated species up with 97.18% accuracy. Hence, the results of present investigation can be used for discrimination of the species and as a tool in predicting fish size from the otoliths and in calculating the biomass of these less studied fish species.

scholarly journals Stock Identification of Engraulis encrasicolus (Linnaeus, 1758) by Discriminant Function Analysis (DFA) of Morphometric Characters in The North of Atlantic and Mediterranean Moroccan Coasts

2021 ◽  
Vol 21 (11) ◽  
pp. 553-558
Author(s):  
Mouna El qendouci ◽  
Fatima Wariaghli ◽  
Mehria Saadaoui ◽  
Lobna Boudaya ◽  
Lassad Neifar ◽  
...  
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Stock Structure ◽  
Morphometric Characters ◽  
European Anchovy ◽  
Engraulis Encrasicolus ◽  
The North ◽  
Fishing Vessels ◽  
The Mediterranean

The European anchovy, Engraulis encrasicolus (Linnaeus, 1758) is a small pelagic fish found in the eastern Atlantic, the Mediterranean Sea and the Black Sea. Anchovy (E. encrasicolus) are among the important finfishes harvested in Moroccan coasts. The stock structure of European anchovy in NW Africa is not truly known (FAO, 2013). To effectively manage the anchovy fisheries, it is important to understand the anchovy stock structure. Therefore, discriminant function analysis (DFA) based on morphometric characters was conducted on a total of 204 adult anchovy specimens, seasonally collected by commercial fishing vessels from the region of Mehdia in the North Atlantic area and from the region of M’diq in the Mediterranean coast during the year 2019. Body shape variation, which is often environmentally induced, may provide a good record population structuring. Our data were subjected to univariate statistics of variance (ANOVA) by using SPSS 20 software version. The morphometric characteristics show a separation of two stocks of Engraulis encrasicolus between the two localities. These findings will have major implications for anchovy fisheries management in Morocco.

Morphometric variations of the Genus Barbonymus (Pisces, Cyprinidae) harvested from Aceh Waters, Indonesia

2018 ◽  
Vol 26 (4) ◽  
pp. 231-237
Author(s):  
Agung Setia Batubara ◽  
Zainal A. Muchlisin ◽  
Deni Efizon ◽  
Roza Elvyra ◽  
Nur Fadli ◽  
...  
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Morphological Characteristics ◽  
Morphometric Data ◽  
Morphometric Characters ◽  
Fish Samples ◽  
Univariate Anova ◽  
Multivariate Discriminant

Abstract The objective of the present study was to analyze the morphometric variations of the three presumed taxa within the Barbonymus group, namely B. gonionotus, referred to locally as naleh; B. schwanenfeldii, referred to locally as lampam-A; and Barbonymus sp. referred to locally as lampam-B. The naleh samples were collected from Nagan Raya District, while lampam-A and lampam-B were collected from Aceh Tamiang District, Indonesia. Traditional morphometric characters were measured in 150 fish samples (50 individuals of every taxon). The results of univariate (ANOVA) and multivariate (Discriminant function analysis, DFA) analyses showed that lampam-A and lampam-B have overlapping morphological characteristics, whereas naleh were distinctly different. Therefore, it is presumed that lampan A and lampan B are the same species of B. schwanenfeldii. It was concluded that the morphometric data indicated that there are two species of Barbonymus in Aceh waters, i.e., B. schwanenfeldii and B. gonionotus.

scholarly journals Morphological variations in Nigerian Apis mellifera Linnaeus, 1758 populations in Guinea savannah agro-ecological zone

2021 ◽  
Vol 90 (4 - Ahead of print) ◽  
pp. 223-235
Author(s):  
Olubusola Temitope Adeoye ◽  
Olufemi Richard Pitan ◽  
Kehinde Olutoyin Ademolu ◽  
Akinola Rasheed Popoola ◽  
Bridget Bobadoye ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Body Length ◽  
Hind Wing ◽  
Pearson Correlation ◽  
Geographic Distance ◽  
The Body ◽  
Ecological Zone ◽  
Morphometric Characters ◽  
Morphological Variations ◽  
Breeding Programmes

Apis mellifera Linnaeus, 1758 is one of the most economically valuable insects which plays significant role in human medicine, nutrition and crop pollination. The morphometric variations of honeybee from different locations of the southern guinea and northern guinea savannah ecological zone of Nigeria were studied. Fifteen morphological traits were measured for variation on six hundred (600) worker honeybee samples purposively collected from ten different locations within the ecological zone. Data collected were subjected to one-way Analysis of Variance (ANOVA), SNK test (α=0.05) and Pearson correlation between morphometric characters were determined. At the same time a dendrogram of morphological proximity based on the fifteen morphological features was constructed. Results showed that morphometry variation (p<0.05) existed within the honeybee population in the guinea savannah agro-ecological zone of Nigeria, high morphological similarities were observed in the tibia length of the hind leg and the thorax length. The honeybee samples were classified into two distinct morphoclusters (A and B). Honeybee samples within morphocluster A were closely related in terms of the examined morphometric features and geographic distance (CV=1.65). In contrast, within cluster B, honeybee samples were closely related despite the vast geographical distance (CV=3.30, p<0.05). The body length was significantly positively correlated with the leg size, while hind wing length was positively associated with the proboscis, abdominal, thoracic, body length and hooks. Morphometric variations found in A. mellifera of guinea agro-ecological zone could significantly impact conservation and future bee breeding programmes of Nigeria.

A Comparison of Imagery Used by Dance Teachers, Figure Skating Coaches, and Soccer Coaches

1998 ◽  
Vol 17 (4) ◽  
pp. 323-337 ◽  
Author(s):  
Lynnette Young Overby ◽  
Craig Hall ◽  
Ian Haslam
Keyword(s):  
Mental Imagery ◽  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Descriptive Statistics ◽  
Figure Skating ◽  
Dance Teachers ◽  
Several Variables ◽  
Correlation Analyses ◽  
And Performance

Many dance teachers and coaches use mental imagery in the planning, implementation, and evaluation of their teaching and coaching. Coaches and dance teachers often direct athletes/dancers to use imagery during practice, competition, and performance. The purpose of this study was to compare the imagery used by dance teachers, figure skating coaches, and soccer coaches. Forty-nine subjects were given the Imagery Use Questionnaire for coaches and dance instructors. Descriptive statistics were calculated for each of the questions pertaining specifically to imagery use. Correlational analyses were conducted on selected items, and t-tests were undertaken on all imagery use items to examine differences in responses between dance teachers, figure skating coaches, and soccer coaches. Variables were then selected on the basis of the correlation analyses and t-tests for inclusion in a discriminant function analysis. The purpose of this analysis was to reveal on which variables in the questionnaire the groups were most distinctly different. The results indicated that on several variables (use of kinesthetic imagery, metaphorical imagery) there were significant differences in the manner in which dance teachers, figure skating coaches, and soccer coaches used mental imagery.

Morphometric and meristic differences between shallow- and deep-water populations of white hake (Urophycis tenuis) in the southern Gulf of St. Lawrence

1998 ◽  
Vol 55 (10) ◽  
pp. 2274-2282 ◽  
Author(s):  
Thomas Hurlbut ◽  
Douglas Clay
Keyword(s):  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Morphological Evidence ◽  
Discriminant Functions ◽  
Meristic Characters ◽  
Traditional Management ◽  
Morphometric Characters ◽  
Linear Discriminant ◽  
Statistical Separation ◽  
Linear Discriminant Function Analysis

Linear discriminant function analysis of morphometric and meristic characters was used to assess the extent of differentiation between shallow- (<100 m) and deep- (>200 m) water populations of white hake (Urophycis tenuis) from the southern Gulf of St. Lawrence (NAFO Division 4T). Although meristic characters provided some evidence for stock separation, the best statistical separation was obtained with morphometric characters. Morphometric discriminant functions derived from "learning" samples were able to correctly classify 82 and 84% of the "test" samples for both females and males, respectively. A greater relative snout length in fish sampled from along the Laurentian Channel compared with those from the Northumberland Strait area was the primary discriminating character for both sexes. Our morphological evidence and previous tagging and distributional studies suggest that the populations from these two areas represent separate stocks; therefore, the traditional management unit for white hake in NAFO Division 4T may no longer be appropriate.

Genetic basis of variation in morphometric characters as implied by hybrids between subspecies of Esox americanus (Pisces: Esocidae)

1987 ◽  
Vol 65 (5) ◽  
pp. 1224-1229 ◽  
Author(s):  
James D. Reist ◽  
E. J. Crossman
Keyword(s):  
Discriminant Analysis ◽  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Genetic Basis ◽  
Function Analysis ◽  
Morphometric Characters ◽  
Laboratory Environment ◽  
Common Laboratory

Artificial hybrids between Esox americanus americanus and Esox americanus vermiculatus, reared in a common laboratory environment, scored intermediately in discriminant analysis to the distribution of scores of reference parental samples. This implies a genetic basis for the variables that differ between the subspecies. Such intermediacy also provides a test of the utility of discriminant function analysis in such analyses. Scores of putative intergrade specimens from Alabama overlapped those of E. a. vermiculatus, indicating our incomplete understanding of the intergradation between these two forms.

Validation of Thamnophilus Capistratus Lesson, 1840 (Passeriformes: Thamnophilidae)

The Auk ◽  
2007 ◽  
Vol 124 (2) ◽  
pp. 665-676
Author(s):  
Claydson P. Assis ◽  
Marcos A. Raposo ◽  
Renata Stopiglia ◽  
Ricardo Parrini
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Taxonomic Status ◽  
Descriptive Statistics ◽  
Plumage Coloration ◽  
Eastern Brazil

Abstract We reviewed the taxonomic status of Thamnophilus doliatus capistratus Lesson, 1840, which is endemic to eastern Brazil. The analyses of skins focused on plumage coloration and measurements. Morphometric skin analyses included descriptive statistics, analyses of variance, and discriminant-function analysis. The results provided a consistent morphological and morphometric diagnosis, and consequently validated Thamnophilus capistratus. Validação de Thamnophilus capistratus Lesson, 1840 (Passeriformes: Thamnophilidae)

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