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1. Morphological discreteness of the estuarine croaker Pseudotolithus elongatus (Teleostei: Sciaenidae)

Author:
Philomena E. Asuquo; Honor T. Ifon
Source:
Journal of fish biology 2022 v.100 no.3 pp. 619-624
ISSN:
0022-1112
Subject:
Pseudotolithus elongatus; alligators; allometry; demographic statistics; discriminant analysis; estuaries; fish; morphometry; principal component analysis; rivers; socioeconomics; tobacco; variance; Nigeria
Abstract:
... The estuarine croaker (Pseudotolithus elongatus, Sciaenidae) has long‐term socio‐economic and ecological significance in tropical and subtropical regions of the world, but little has been reported on the population demographics of this species. In this study, a traditional morphometric approach was used to test the hypothesis that island samples are morphologically distinctive from adjoining estua ...
DOI:
10.1111/jfb.14974

2. Species identification of two Loliginidae cryptic species in China Seas with morphological and molecular methods

Author:
Yue Jin; Chao Wang; Nan Li; Zhou Fang
Source:
Regional studies in marine science 2022 v.55 pp. 102549
ISSN:
2352-4855
Subject:
DNA; Uroteuthis chinensis; allometry; biological speciation; cryptic species; discriminant analysis; gene flow; habitats; haplotypes; marine science; nucleotide sequences; phylogeny; principal component analysis; species identification; China; East China Sea; South China Sea
Abstract:
... Uroteuthis chinensis and Uroteuthis edulis are morphologically similar squids and commercially important for Indo-Pacific Ocean fisheries. Hence, species identification is vital for them because of their similarity. In order to distinguish the two species, two methods (teeth shape of arm sucker ring and DNA sequence) were adopted. In the study, 341 individuals (210 U. chinensis and 131 U. edulis) ...
DOI:
10.1016/j.rsma.2022.102549

3. Discriminant evaluations on adolescent facial phenotypic morphological variations between two ethnic groups resident in Ibadan (Nigeria) metropolis – A regional baseline geometric pilot study

Author:
Abiodun Olowo; Michael Samuel; Moses Olusola Adetona
Source:
Forensic science international 2021 v.3 pp. 100193
ISSN:
2665-9107
Subject:
adolescents; allometry; discriminant analysis; forensic sciences; geometry; morphs; phenotype; phylogeny; Nigeria
Abstract:
... Facial profiling for ethnic populations and representatives within Nigeria retains no documented evidence for distinguishing facial morphology and has at best remained ambiguous and incoherent. This investigation seeks to evaluate inter and intra tribal facial morphologic variations and sexual dimorphisms between two ethnic population groups co-resident within the same geographical area in Ibadan ...
DOI:
10.1016/j.fsir.2021.100193

4. Does a male nest builder have the same head shape as his mate? Sexual dimorphism in Leptodactylus fuscus (Anura: Leptodactylidae)

Author:
Daniel de Abreu e Melo-Moreira; Roberta Azeredo Murta-Fonseca; Conrado Aleksander Barbosa Galdino; Luciana Barreto Nascimento
Source:
Zoologischer Anzeiger 2021 v.295 pp. 23-33
ISSN:
0044-5231
Subject:
Leptodactylus; allometry; discriminant analysis; foams; geometry; head; males; morphometry; nests; oviposition; principal component analysis; sexual dimorphism
Abstract:
... Males of Leptodactylus fuscus (Schneider, 1799) construct subterranean chambers with the snout. The chamber is used for oviposition in a foam nest. Due to this behaviour, it's inferred that there are different selective pressures according the sex. We aimed to evaluate the occurrence of sexual dimorphism in the head shape of L. fuscus through geometric morphometrics analysis of 97 specimens (51 ma ...
DOI:
10.1016/j.jcz.2021.09.004

5. Effect of eco-physiological factors on biometric traits of green mussel Perna viridis cultured in the south-east coast of the Bay of Bengal, Bangladesh

Author:
Aysha Rahi Noor; Abrar Shakil; Nayeema Ferdausy Hoque; Md Moshiur Rahman; Sumi Akter; Avijit Talukder; Sk Ahmad-Al-Nahid; Md Abdul Wahab; Md Nahiduzzaman; Md Jalilur Rahman; Md Asaduzzaman
Source:
Aquaculture reports 2021 v.19 pp. 100562
ISSN:
2352-5134
Subject:
Perna viridis; allometry; aquaculture; biodiversity conservation; biometry; coasts; correlation; data collection; dimensions; discriminant analysis; ecophysiology; environmental factors; females; food availability; gonadosomatic index; height; information; ingestion; knowledge; length; males; mussels; oxygen; plankton; principal component analysis; regression analysis; salinity; temperature; tissue weight; tissues; turbidity; variability; weight; width; Bangladesh; Bay of Bengal
Abstract:
... Information on allometry, condition indices (CIs), and biometric traits (BTs) of marine bivalves are necessary for determining the growth pattern and the size at which harvest can be intensified to maximize production in aquaculture. These parameters of marine bivalves are largely regulated by the complex interactive effects of various ecological and physiological factors. Therefore, the present s ...
DOI:
10.1016/j.aqrep.2020.100562

6. Within-population morphological differences in the New World silverside Odontesthes argentinensis inhabiting two coastal lagoons of Uruguay (southwestern Atlantic)

Author:
Renzo Vettorazzi; Diego Nuñez; Walter Norbis
Source:
Animal biology v.70 no.2 pp. 189-202
ISSN:
1570-7555
Subject:
Odontesthes argentinensis; allometry; artisanal fishing; coastal water; discriminant analysis; estuaries; eyes; fish; fishermen; hydrodynamics; morphometry; mouth; phenotypic plasticity; sensation; traditional technology; Argentina; Brazil; Uruguay
Abstract:
... Silversides are renowned for their phenotypic plasticity with different populations coexisting as incipient species. The New World silverside Odontesthes argentinensis is an estuarine-resident fish with known populations inhabiting the Rio de la Plata estuary as well as coastal lagoons of Brazil, Uruguay and Argentina, where it constitutes an important resource for artisanal fisheries. Using class ...
DOI:
10.1163/15707563-20191142

7. Morphological Analysis of Static Skull Variation in the Large Japanese Field Mouse, Apodemus speciosus (Rodentia: Muridae)

Author:
Jadab Kumar Biswas; Masaharu Motokawa
Source:
Mammal study 2019 v.44 no.1 pp. 51-63
ISSN:
1348-6160
Subject:
Apodemus speciosus; allometry; discriminant analysis; females; males; mice; multivariate analysis; ontogeny; sexual dimorphism; skull; standard deviation
Abstract:
... Static skull morphological variation in the large Japanese field mouse (Apodemus speciosus) was analyzed using different indices of variability. Multivariate analysis of variance revealed sexual dimorphism in cranium and mandible sizes, among a total of 89 skulls (45 males and 44 females). The coefficient of variation (CV), standard deviation (SD), and residuals of the standard deviation (RSD) wer ...
DOI:
10.3106/ms2018-0033

8. Sexual and ontogenetic morphometric variation in Xiphopenaeus kroyeri (Crustacea, Decapoda, Penaeidae): a new approach with linear and angular morphometric data

Author:
S. A. S. N. Moraes; C. E. R. D. Alencar; A. Fransozo; R. C. Costa; A. L. Castilho; F. A. M. Freire
Source:
Invertebrate reproduction & development 2018 v.62 no.3 pp. 143-153
ISSN:
2157-0272
Subject:
Penaeidae; adults; allometry; analysis of covariance; cephalothorax; deglutition; discriminant analysis; equations; gills; gonads; juveniles; morphometry; multivariate analysis; normal distribution; ontogeny; phenotype; predation; predators; sexual maturity; Brazil
Abstract:
... The present study evaluates the ontogenetic/sexual morphometric variation in Xiphopenaeus kroyeri. Sampling was from July 2001 to June 2003 at Ubatuba, São Paulo, Brazil. Animals were sexed and measured (cephalothorax length-CC, partial of the rostral spine-CPR, rostral spine-CR and rostral spine angulation-AR). Data analysis included linear morphometric analysis: equation ln y = ln a + ln b (sex/ ...
DOI:
10.1080/07924259.2018.1461691

9. Genital morphology and allometry differ by species and sex in Malawi cichlid fishes

Author:
Emily C. Moore; Reade B. Roberts
Source:
Hydrobiologia 2017 v.791 no.1 pp. 127-143
ISSN:
0018-8158
Subject:
Cichlidae; allometry; body size; discriminant analysis; evolution; females; fish; gender differences; gonads; interspecific variation; males; sex determination analysis; sexual dimorphism; Lake Malawi; Malawi
Abstract:
... The African cichlid fishes show great diversity in mating displays and reproductive strategies, yet species differences in genital morphology have been little studied. Observational notes have described broad sex differences in external genital shape between males and females, but these differences have not been quantified. We examined three aspects of genital morphology (relative anogenital dista ...
DOI:
10.1007/s10750-016-2912-6

10. Functional morphology of the cave bear (Ursus spelaeus) mandible: a 3D geometric morphometric analysis

Author:
Anneke H. van Heteren; Ann MacLarnon; Christophe Soligo; Todd C. Rae
Source:
Organisms, diversity, & evolution 2016 v.16 no.1 pp. 299-314
ISSN:
1439-6092
Subject:
Ailuropoda melanoleuca; Ursus; allometry; diet; discriminant analysis; fossils; herbivores; ingestion; least squares; leaves; meat; morphometry; muscles; niches; phylogeny; principal component analysis
Abstract:
... The diet of the fossil cave bears (Ursus spelaeus group) has been debated extensively. Thought traditionally to be herbivorous, more recent studies have proposed more meat in the cave bear diet. To test this, the mandibular morphology of cave bears was analysed using 3D geometric morphometrics and compared to that of extant Ursidae. Landmarks for 3D digitisation of the mandible were chosen to refl ...
DOI:
10.1007/s13127-015-0238-2

11. Analysis of coupled geographic variation of three shrew species from Southern and Northern Ural taxocenes

Author:
A. G. Vasil’ev; I. A. Vasil’eva; T. P. Kourova
Source:
Russian journal of ecology 2015 v.46 no.6 pp. 552-558
ISSN:
1067-4136
Subject:
Sorex; allometry; climate change; discriminant analysis; geographical variation; latitude; shrews; sympatry
Abstract:
... Coupled and unidirectional geographical variability of the shape of the mandible in three shrew species of the genus Sorex (araneus, caecutiens, and minutus) has been revealed in a geometric morphometrics-based parallel comparison of cenopopulations forming the Ilmen’ (Southern Urals) and Kytlym (Northern Urals) taxocenes. Mandible centroid size (CS) was significantly larger and significantly more ...
DOI:
10.1134/S1067413615060223

12. New insights to discriminate between Sympterygia acuta Garman 1877 and Sympterygia bonapartii Müller & Henle, 1841 (Rajidae) of the Southwest Atlantic Ocean: on the use of geometric morphometrics and spinulation patterns

Author:
P. Orlando; M. González‐Castro; E. Mabragaña
Source:
Journal of applied ichthyology 2015 v.31 no.2 pp. 381-389
ISSN:
0175-8659
Subject:
Rajidae; allometry; discriminant analysis; eyes; fins; integument; morphometry; mouth; nose; ontogeny; plant spines; principal component analysis; spiracles; Atlantic Ocean
Abstract:
... Geometric‐morphometric and spinulation pattern approaches were employed to assess the discrimination of two species of Sympterygia skates in the Southwest Atlantic: Sympterygia acuta Garman 1877 and Sympterygia bonapartii Müller & Henle, 1841. Two types of variables were employed: linear morphometrics measurements (LMMs), and interlandmark distances (IlDs). The Principal Component Analysis (PCA) a ...
DOI:
10.1111/jai.12674

13. Pattern of morphological variations in Alghad snowtrout, Schizopyge niger (Heckel 1838) from Kashmir Himalaya using truss network analysis

Author:
Javaid Iqbal Mir; Farooq Ahmad Mir; Suresh Chandra; Rabindar Singh Patiyal
Source:
Ichthyological research 2013 v.60 no.3 pp. 256-262
ISSN:
1341-8998
Subject:
allometry; analysis of variance; computer software; discriminant analysis; factor analysis; morphometry; peduncle; rivers; surface water; Himalayan region; India
Abstract:
... A total of 278 Schizopyge niger (Alghad snowtrout) samples were collected from three water bodies of Kashmir Himalaya and studied for body shape morphometrics. The truss method was used to generate 21 morphometrics from 11 landmarks using the software applications tpsUtil, tpsDig2 version 2.1 and PAST. The allometrically transformed truss measurements were subjected to factor analysis, classificat ...
DOI:
10.1007/s10228-013-0347-x

14. The influence of aspect and altitude on the size, shape and spatial distribution of glacial cirques in the High Tatras (Slovakia, Poland)

Author:
Marek Křížek; Peter Mida
Source:
Geomorphology 2013 v.198 no. pp. 57-68
ISSN:
0169-555X
Subject:
allometry; altitude; climate; cold; discriminant analysis; landforms; morphometry; multivariate analysis; solar radiation; topographic slope; Poland; Slovakia
Abstract:
... The shape of glacial cirques is generally considered to result from the combined actions of climate, topography, and geology. The goal of this article was to determine the dependence of cirque morphology on mesoclimatic conditions defined by altitude and aspect in the highest part of the Carpathians — the High Tatras. The morphology of each of 116 analyzed cirques was described using a set of 12 m ...
DOI:
10.1016/j.geomorph.2013.05.012

15. Does compensatory growth modify fish scale shape?

Author:
A. L. Ibáñez; E. Pacheco-Almanzar; I. G. Cowx
Source:
Environmental biology of fishes 2012 v.94 no.2 pp. 477-482
ISSN:
0378-1909
Subject:
fish culture; discriminant analysis; animal growth; fish farms; foods; Rutilus rutilus; allometry; principal component analysis; food availability; compensatory growth; fish; multivariate analysis; habitats; juveniles; United Kingdom
Abstract:
... Although the shape of fish scales is useful for determining stock membership, the role of extrinsic (e.g. habitat, food type) and intrinsic (e.g. growth) factors in determining variation in fish scales shape has not been determined. This study examined whether fish scale shape changes as a result of compensatory growth in juveniles of the cyprinid roach, Rutilus rutilus (L.) reared on a fish farm ...
DOI:
10.1007/s10641-011-9962-4

16. Sexual Dimorphism, Allometry, and Size at First Maturity of the Caribbean King Crab, Mithrax spinosissimus, in the Florida Keys

Author:
Baeza J. Antonio; Anderson Joshua R.; Spadaro Angelo J.; Behringer Donald C.
Source:
Journal of shellfish research 2012 v.31 no.4 pp. 909-916
ISSN:
0730-8000
Subject:
abdomen; adults; allometry; aquaculture; cluster analysis; crabs; discriminant analysis; females; fisheries; juveniles; larval development; males; ontogeny; postlarvae; principal component analysis; regression analysis; sexual dimorphism; sexual maturity; Caribbean; Florida; Gulf of Mexico
Abstract:
... The Caribbean King crab Mithrax spinosissimus is the largest brachyuran found in the western Atlantic and it supports subsistence and small commercial fisheries throughout the Caribbean and Gulf of Mexico. Because of its short larval duration and rapid growth, M. spinosissimus is considered a good candidate for aquaculture. Our study documents for the first time the size at sexual maturity, sexual ...
DOI:
10.2983/035.031.0401

17. Sexual dimorphism in shells of Cochlostoma septemspirale (Caenogastropoda, Cyclophoroidea, Diplommatinidae, Cochlostomatinae)

Author:
Fabian Reichenbach; Hannes Baur; Eike Neubert
Source:
ZooKeys 2012 v.208 pp. 1-16
ISSN:
1313-2970
Subject:
Gastropoda; allometry; discriminant analysis; morphometry; sexual dimorphism; snails
Abstract:
... Sexual dimorphisms in shell-bearing snails expressed by characteristic traits of their respective shells would offer the possibility for a lot of studies about gender distribution in populations, species, etc. In this study, the seven main shell characters of the snail Cochlostoma septemspirale were measured in both sexes: (1) height and (2) width of the shell, (3) height and (4) width of the aper ...
DOI:
10.3897/zookeys.208.2869

18. Size scaling and stiffness of avian primary feathers: implications for the flight of Mesozoic birds

Author:
X. WANG; R. L. NUDDS; C. PALMER; G. J. DYKE
Source:
Journal of evolutionary biology 2012 v.25 no.3 pp. 547-555
ISSN:
1010-061X
Subject:
allometry; birds; discriminant analysis; feathers; flight; fossils; prediction; variance
Abstract:
... The primary feathers of birds are subject to cyclical forces in flight causing their shafts (rachises) to bend. The amount the feathers deflect during flight is dependent upon the flexural stiffness of the rachises. By quantifying scaling relationships between body mass and feather linear dimensions in a large data set of living birds, we show that both feather length and feather diameter scale mu ...
DOI:
10.1111/j.1420-9101.2011.02449.x
PubMed:
22260434

19. Morphometric analysis of some populations of lymnocardiid species (Mollusca: Bivalvia) from Razelm Lake Complex (Romania)

Author:
Oana Popa; Elena Iorgu; Beatrice Kelemen; Dumitru Murariu; Luis Popa
Source:
Travaux du Muséum national d'histoire naturelle "Grigore Antipa." 2011 v.53 no.1 pp. 13-19
ISSN:
1223-2254
Subject:
Hypanis colorata; allometry; discriminant analysis; geographical variation; lakes; morphometry; multivariate analysis; Romania
Abstract:
... In this paper we report the morphometric analysis of some populations of Lymnocardiid species from the lakes Razelm and Goloviţa. We used three measurements ratios to perform a discriminant analysis and a multivariate analysis of variance (MANOVA), in order to compare the species Hypanis colorata vs. Hypanis angusticostata in the two lakes, H. colorata in Razelm vs. Goloviţa, and H. angusticostata ...
DOI:
10.2478/v10191-010-0002-y

20. Ontogenetic and environmental effects on otolith shape variability in three Mediterranean European eel (Anguilla anguilla, L.) local stocks

Author:
Fabrizio Capoccioni; Corrado Costa; Jacopo Aguzzi; Paolo Menesatti; Antoni Lombarte; Eleonora Ciccotti
Source:
Journal of experimental marine biology and ecology 2011 v.397 no.1 pp. 1-7
ISSN:
0022-0981
Subject:
discriminant analysis; Anguilla anguilla; animal growth; catadromous fish; eel; migratory behavior; otoliths; rivers; allometry; animal morphology; marine environment; cluster analysis; least squares; environmental factors; brackish water; habitats
Abstract:
... Otolith morphology is an efficient tool for the discrimination of fish stocks, populations and species when comparative genetic data are not available. Currently, the relationship between environmental factors and otolith shape is poorly characterized for the European eel (Anguilla anguilla), a highly migratory catadromous species constituting a single, randomly mating stock. The present study ana ...
DOI:
10.1016/j.jembe.2010.11.011

21. Using ZooImage automated system for the estimation of biovolume of copepods from the northern Argentine Sea

Author:
R. Di Mauro; G. Cepeda; F. Capitanio; M.D. Viñas
Source:
Journal of sea research 2011 v.66 no.2 pp. 69-75
ISSN:
1385-1101
Subject:
Copepoda; algorithms; allometry; discriminant analysis; equations
Abstract:
... A total of 46 samples from coastal and shelf sectors from the northern Argentine Sea (34°–41° S) were digitized to compare the performance of the new ZooImage analysis method for copepod abundance and biovolume estimations. A training set of 1437 objects were used for automatic discrimination using a Random Forest algorithm with a general accuracy of 83.92%. A total of 11 taxa were automatically c ...
DOI:
10.1016/j.seares.2011.04.013

22. Applied 3D texture features in ALS-based forest inventory

Author:
Vauhkonen, Jari; Tokola, Timo; Maltamo, Matti; Packalén, Petteri
Source:
European journal of forest research 2010 v.129 no.5 pp. 803-811
ISSN:
1612-4669
Subject:
allometry; data collection; discriminant analysis; forest inventory; models; spectral analysis; texture; tree and stand measurements; trees
Abstract:
... Airborne laser scanning (ALS) data are not usually considered to be very informative with respect to tree species, and this information is often obtained by combining such data with spectral image material. The aim was to test the ability of height, density, intensity and applied 2D and 3D texture variables derived solely from a very high-density ALS point cloud to describe the crown shape and str ...
DOI:
10.1007/s10342-009-0279-1

23. Comparative morphometric study of the invasive pearl oyster Pinctada radiata along the Tunisian coastline

Author:
Sabiha Tlig-Zouari; Lotfi Rabaoui; Ikram Irathni; Moctar Diawara; Oum Hassine
Source:
Biologia 2010 v.65 no.2 pp. 294-300
ISSN:
1336-9563
Subject:
Pinctada radiata; allometry; coasts; discriminant analysis; morphometry; oysters; quantitative analysis; Red Sea; Tunisia
Abstract:
... In order to study the relative growth of the pearl oyster Pinctada radiata in Tunisia, a total of 330 individuals of this species were collected from six sites along the Tunisian coastline. Quantitative measurements of collected oysters were conducted for shell height, shell length, shell width, hinge length, height and width of the nacreous part and wet weight. The size structure of the sampled p ...
DOI:
10.2478/s11756-010-0023-9

24. How to distinguish most similar insect species--improving the stereomicroscopic and mathematical evaluation of external characters by example of ants

Author:
Seifert, B.
Source:
Journal of applied entomology 2002 v.126 no.9 pp. 445-454
ISSN:
0931-2048
Subject:
Formicidae; anatomy and morphology; allometry; taxonomy; microscopy; measurement; discriminant analysis; regression analysis; mathematical models; variance
DOI:
10.1046/j.1439-0418.2002.00693.x

25. Morphological variation in Hemisarcoptes (Acari: Hemisarcoptidae): application of multivariate morphometric analyses

Author:
Houck, M.A.; OConnor, B.M.
Source:
Annals of the Entomological Society of America 1998 v.91 no.3 pp. 335-349
ISSN:
0013-8746
Subject:
discriminant analysis; ova; allometry; geographical variation; principal component analysis; gender differences; Astigmata; body length; anatomy and morphology; multivariate analysis; shape; France; New York; Texas; California
Abstract:
... Mites of the genus Hemisarcoptes were collected from 4 geographically isolated portions of their distribution: California, France, New York, and Texas. An analysis of variance, a principal component analysis (PCA), a discriminant function analysis, an analysis of allometric relationships among characters, and a vector analysis were used to interpret morphological differences among females and male ...
DOI:
10.1093/aesa/91.3.335