The combination of bivariate and multivariate methods to analyze character synchronization and early allometric growth patterns in the stellate sturgeon (Acipenser stellatus) as tools for better understanding larval behavior

2017 ◽  
Vol 74 (10) ◽  
pp. 1528-1537 ◽  
Author(s):  
Hamid Eshaghzadeh ◽  
Carles Alcaraz ◽  
Arash Akbarzadeh ◽  
Enric Gisbert
Keyword(s):  
Principal Component ◽  
Dispersal Distance ◽  
Larval Period ◽  
Growth Patterns ◽  
Allometric Growth ◽  
Morphometric Characters ◽  
Body Regions ◽  
Acipenser Stellatus ◽  
Juvenile Stages ◽  
Median Fins

Multivariate allometry patterns and length at metamorphosis (Lm) were determined in Acipenser stellatus by means of principal component analysis from 12 morphometric characters. The multivariate analysis differentiated three growth stanzas: the prelarval, larval, and early juvenile stages. The prelarval stage comprised the period from hatching (9.7 mm in total length, TL) to the transition to exogenous feeding (17.7 mm TL, Lm1), a period characterized by yolk sac depletion and fast growth of the anterior and posterior body regions. These changes coincided with the development of sensory, feeding, respiratory, and swimming systems to improve foraging behavior and predator avoidance. During the larval period (17.7–52.8 mm, Lm1–Lm2), specimens reached a juvenile phenotype characterized by the development of median fins, elongation and flattening of the snout and formation of bony scutes, and the improvement of their swimming capacities, allowing larvae to regulate their dispersal distance from the spawning grounds. The end of the larval period and acquisition of the juvenile phenotype were found after Lm2 when some variables reached isometry or even displayed a negative allometric growth.

scholarly journals Morphometric variation of the horseshoe crab Tachypleus gigas (Xiphosura: Limulidae) from the Banyuasin estuarine of South Sumatra, Indonesia

2021 ◽  
Vol 22 (11) ◽  
Author(s):  
Fauziyah FAUZIYAH ◽  
APON Z. MUSTOPA ◽  
FATIMAH FATIMAH ◽  
ANNA I. S. PURWIYANTO ◽  
ROZIRWAN ROZIRWAN ◽  
...  
Keyword(s):  
Horseshoe Crab ◽  
Stock Assessment ◽  
Function Analysis ◽  
Principal Component ◽  
Growth Patterns ◽  
The Body ◽  
Morphometric Variation ◽  
Morphometric Characters ◽  
Morphological Studies ◽  
Significant Difference

Abstract. Fauziyah, Mustopa AZ, Fatimah, Purwiyanto AIS, Rozirwan, Agustriani F, Putri WAE. 2021. Morphometric variation of the horseshoe crab Tachypleus gigas (Xiphosura: Limulidae) from the Banyuasin estuarine of South Sumatra, Indonesia. Biodiversitas 22: 5061-5070. Morphological studies are essential for fish resource management, ecology, conservation, and stock assessment. This research was conducted to characterize the morphological variation of the coastal horseshoe crab (Tachypleus gigas) from the Banyuasin estuarine, South Sumatra, Indonesia. The body weight (BW), prosoma width (PW), carapace length (CL), telson length (TEL), and total length (TL) were measured for describing the morphometric variability of T. gigas. A total of 70 T. gigas (32 females and 38 males) were found using trammel net fishing and bottom gillnet during the survey. Multivariate and allometric methods analyzed their morphometric characters. Based on Kruskal- Wallis tests, the result showed a significant difference in somebody measurements (TL and CL) between males and females. The principal component analysis (PCA) results showed that all morphometric characters had a strong correlation in both sexes, so the first principal component (PC1) values were 92% and 72%. In comparison, the second principal component (PC2) values were 5% and 20% in females and males, respectively. The results of discriminant function analysis (DFA) suggested that only one (BW) of the five morphometric characters was significant in separating both sexes. Both sexes were also revealed variations in growth patterns based on the allometric analysis results. These results were expected to be used as a basis for managing the horseshoe crab population-based conservation.

scholarly journals Allometric growth patterns in hatchery-reared larvae of the catfish Lophiosilurus alexandri (Pisces: Pseudopimelodidae)

2014 ◽  
Vol 66 (1) ◽  
pp. 284-288 ◽  
Author(s):  
R.J. Guimarães-Cruz ◽  
V.C. Veloso-Júnior ◽  
N.G. Sales ◽  
D.A.A. Oliveira ◽  
J.E. Santos
Keyword(s):  
Standard Length ◽  
Growth Analysis ◽  
Body Height ◽  
Growth Patterns ◽  
Head Length ◽  
Allometric Growth ◽  
Positive Relation ◽  
Initial Development ◽  
Eye Diameter ◽  
Head Height

The aim of the present study was to characterize the relationships that occur between morphometric variables of larvae of Lophiosilurus alexandri Steindachner, 1876 through their allometric growth analysis. Total length, head length and body height were correlated with standard length, head height and body height, as well as eye diameter and head height with head length. The results revealed allometric positive relation during the initial development, where the b coefficient varied between 1.10 and 2.81. The variable pre-anal distance in relation to the standard length and the snout length in relation to the head length revealed an allometric negative relation, where the b coefficient was 0.85 and 0.94, respectively.

scholarly journals Skull morphometric characters in parrots (Psittaciformes)

2020 ◽  
Vol 28 (1) ◽  
pp. 104-120
Author(s):  
Tibor Pecsics ◽  
Miklós Laczi ◽  
Gergely Nagy ◽  
Tamás Kondor ◽  
Tibor Csörgő
Keyword(s):  
Ventral View ◽  
Relative Size ◽  
Relative Length ◽  
Principal Component ◽  
Relative Width ◽  
Geometric Morphometric ◽  
Morphometric Characters ◽  
Lacrimal Bone ◽  
The Tropics ◽  
Avian Group

AbstractParrots (Psittaciformes) are a unique and diverse avian group and vary tremendously in size, shape, and colour. Mainly distributed throughout the tropics and subtropics, most species of parrots are largely or exclusively arboreal with several exceptions. The species also differ in diet and habitat, which led to different musculoskeletal adaptations of the skull. However, parrots have conspicuous generalized external features; in this recent study, we tried to increase our knowledge of the cranial shape and foraging habits. A geometric morphometric approach was used to analyse two-dimensional cranial landmarks. We used principal component (PC) analyses on measurements that may be related to diet. The PCs described the relative height of the cranium, the relative length and curvature of the beak, differences in the orientation and curvature of the lacrimal bone and the upper margin of orbits, variation in the size and position of the palatine bone and the relative width of the cranium, and variation in the relative size of the neurocranium compared to the viscerocranium. The dietary categories overlap in the morphospace but the analysis in lateral and ventral view resulted in significant differences.

scholarly journals Polikromatik, dimorfisme seksual, dan redeskripsi spesies ikan red devil, Amphilophus amarillo [Stauffer & McKaye, 2002] di Waduk Sermo Yogyakarta

2018 ◽  
Vol 18 (1) ◽  
pp. 69
Author(s):  
Sitty Ainsyah Habibie ◽  
Djumanto Djumanto ◽  
Murwantoko Murwantoko
Keyword(s):  
Control Region ◽  
Principal Component ◽  
Gill Tissue ◽  
Morphometric Character ◽  
Fish Sample ◽  
Trophic Polymorphism ◽  
Sex Dimorphism ◽  
Morphometric Characters ◽  
Male And Female ◽  
Fish Group

Red devil has been extensively researched due to extremely high morphometric and chromatophore variations, including the phenomena of polychromatic and trophic polymorphism. The purpose of this study was to identify and observe the phenomenon of sex dimorphism that occurs in polychromatic red devil species which caught in Sermo Reservoir. Fish sample as much as 240 individual was collected from fishermen catch during November 2016-September 2017 by using gill nets, cest nets, and fishing rods. Subsequently, the fish sample was grouped based on color and sex, the namely group of red devil red, red devil black, and red devil reddish black. The morphometric character data of 21 units were measured in each fish sample, whereas the DNA samples were taken from the gill tissue on each species of two individuals. The morphometric character data was analyzed for discriminant distance, while DNA was analyzed by BLAST (Basic Local Allignment Search Tools) from NCBI. The result of the principal component analysis and discriminant function showed the three group of fish can be distinguished by the characters around the head. The T-test of male and female morphometric characters in each fish group showed the phenomenon of sex dimorphism. Canonical and dendrogram diagrams consistently classify the three group of fish as the same species but are segregated by sex so that significantly dimorphism occurs. The mitochondrial sequencing results of the DNA control region show that among the red devil fish group found in the Sermo Reservoir is a species of A. amarillo.AbstrakRed devil telah banyak diteliti karena variasi morfometrik dan kromatofora yang sangat tinggi, termasuk di dalamnya fenomena polikromatisme dan trofik polimorfisme. Penelitian ini bertujuan untuk mengamati polikromatik dan dimor-fisme seksual serta mengidentifikasi spesies red devil di perairan Waduk Sermo Yogyakarta. Contoh ikan sebanyak 240 ekor diambil dari hasil tangkapan nelayan selama bulan November 2016-September 2017 dengan menggunakan jaring insang, jala dan pancing. Selanjutnya contoh ikan dikelompokkan berdasarkan warna dan jenis kelamin, yaitu kelompok red devil merah, red devil hitam, dan red devil merah kehitaman. Data karakter morfometrik sebanyak 21 unit diukur pada setiap contoh ikan, sedangkan contoh DNA diambil dari jaringan insang pada masing-masing kelompok ikan seba-nyak dua ekor. Data karakter morfometrik dianalisis pembedanya, sedangkan DNA dianalisis dengan BLAST (Basic Local Allignment Search Tools) dari NCBI. Hasil analisis komponen utama dan fungsi diskriminan menunjukkan ketiga kelompok ikan dapat dibedakan berdasarkan karakter yang berada di sekitar kepala. Uji t terhadap karakter morfome-trik jantan dan betina pada masing-masing kelompok ikan menunjukkan fenomena dimorfisme seksual. Diagram kanonikal dan dendrogram konsisten mengelompokkan ketiga kelompok ikan tersebut sebagai spesies yang sama, namun terpisah berdasarkan jenis kelamin sehingga sangat nyata terjadi dimorfisme. Hasil sekuensing mitokondria DNA control region menunjukkan seluruh kelompok ikan red devil yang ditemukan di Waduk Sermo merupakan spesies Amphilophus amarillo.

scholarly journals Length-weight relationship of Threadfin Bream (Nemipterus sp.) in Village Malang Rapat Waters, Bintan Regency, Riau Island

2020 ◽  
Vol 13 (2) ◽  
pp. 449
Author(s):  
Rapita Rapita ◽  
Susiana Susiana ◽  
Rochmady Rochmady
Keyword(s):  
Growth Patterns ◽  
Allometric Growth ◽  
Fish Resources ◽  
Weight Relationship ◽  
Relationship Of

Village Malang Rapat waters are have the potential and habitat of kurisi fish resources (Nemipterus sp.). The research was to determine the length-weight relationship of kurisi fish (Nemipterus sp.) in Village Malang Rapat. Sampling of kurisi fish (Nemipterus sp.) in two months (October-November 2020) is taken once a week based on fishing grounds and habitat. Length-weight relationship of female and male kurisi fish (Nemipterus sp.) were y = 1,1568x2,0659 and y = 1,2123x1,8971 respectively, based on this value show that female and male kurisi fish (Nemipterus sp.) in Village Malang Rapat waters have negative allometric growth patterns (b < 3).

Taxonomy, natural history, and conservation of the Great-billed Seed-Finch Sporophila maximiliani (Cabanis, 1851) (Thraupidae, Sporophilinae)

Zootaxa ◽  
2018 ◽  
Vol 4442 (4) ◽  
pp. 551 ◽  
Author(s):  
FLÁVIO KULAIF UBAID ◽  
LUÍS FABIO SILVEIRA ◽  
CESAR A. B. MEDOLAGO ◽  
THIAGO V. V. COSTA ◽  
MERCIVAL ROBERTO FRANCISCO ◽  
...  
Keyword(s):  
Natural History ◽  
South America ◽  
Captive Breeding ◽  
Conservation Status ◽  
Bird Species ◽  
Principal Component ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Morphometric Characters ◽  
History Of

Seed-finches are small-sized Neotropical granivorous birds characterized by extremely strong and thick beaks. Among these birds, the Great-billed Seed-Finch Sporophila maximiliani has been selectively and intensively trapped to the extent that has become one of the most endangered bird species in South America, yet its taxonomy remains complex and controversial. Two subspecies have been recognized: S. m. maximiliani (Cabanis, 1851), mainly from the Cerrado of central South America, and S. m. parkesi Olson (= Oryzoborus m. magnirostris), from northeastern South America. Originally, S. m. parkesi was diagnosed as being larger than the Large-billed Seed-Finch, S. c. crassirostris (Gmelin, 1789), but proper comparisons with S. m. maximiliani, which is larger than S. c. crassirostris, were never performed. Here we provide a review of the taxonomic and nomenclatural history of S. maximiliani, reevaluate the validity and taxonomic status of the subspecies based on morphological characters, and significantly revise its geographic distribution. Analyses based on plumage patterns and a Principal Component Analysis of morphometric characters indicated that S. m. parkesi is most appropriately treated as a synonym of the nominate taxon, which results in a monotypic S. maximiliani comprising two disjunct populations. Further, we conducted systematic searches for S. maximiliani in Brazil, in an attempt to obtain natural history information. After more than 6,000 hours of fieldwork in 45 areas of potential and historical occurrence, S. maximiliani was located only in two sites, in marshy environments called veredas, confirming the critical conservation status of this species, at least in Brazil. We discuss the conservation potential for, and the problems involved with, captive breeding of S. maximiliani for reintroduction into the wild. 

Scanning Electron Microscopy and Geometric Contour Morphometry for Identifying Eggs of Three Amazonian Species of Mansonia (Diptera: Culicidae)

2019 ◽  
Vol 57 (3) ◽  
pp. 745-754
Author(s):  
Francisco Augusto da Silva Ferreira ◽  
Rejane de Castro Simões ◽  
Ruth Leila Ferreira-Keppler ◽  
Jeronimo Alencar ◽  
Vera Margarete Scarpassa ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Principal Component Analysis ◽  
Principal Component ◽  
Accuracy Rate ◽  
Morphometric Characters ◽  
Geometric Morphometry ◽  
Neotropical Species ◽  
Egg Morphology ◽  
Scanning Electron

Abstract The eggs of three Amazonian species of the genus Mansonia (Diptera: Culicidae) were analyzed using morphological and morphometric characters. Eggs of Mansonia humeralis Dyar & Knab, 1916 were morphologically different from those of Mansonia titillans (Walker, 1848) and Mansonia amazonensis (Theobald, 1901), which were more similar to each other according to linear and geometric morphometry. A principal component analysis generated from elliptic Fourier contour data (PC1—92.6% and PC2—2.61%) indicated that Ma. amazonensis and Ma. titillans are more similar to each other than either is to Ma. humeralis. Discriminant multivariate analysis was highly accurate with only four classification errors and a 90% accuracy rate. The results indicate that the three Amazonian species can be precisely distinguished in the egg stage and that geometric morphometry based on elliptic Fourier contours is a promising method for distinguishing eggs of species of Mansonia. An identification key based on egg morphology is provided to distinguish the four Neotropical species.

scholarly journals Allometric Growth Patterns of Fine Scale Fish Larvae and Its Ecological Significance

2020 ◽  
Vol 1575 ◽  
pp. 012157
Author(s):  
Guiqiang Yang ◽  
Zhanquan Wang ◽  
Jie He ◽  
Wentong Li ◽  
Ding Yuan
Keyword(s):  
Fish Larvae ◽  
Growth Patterns ◽  
Fine Scale ◽  
Ecological Significance ◽  
Allometric Growth

scholarly journals Morphological Divergence of Snow Trout (Schizothorax Richardsonii, Gray 1932) from Rivers of Nepal with Insights from a Morphometric Analysis

2015 ◽  
Vol 3 (3) ◽  
pp. 464-473
Author(s):  
Suresh Kumar Wagle ◽  
Neeta Pradhan ◽  
Madhav Kumar Shrestha
Keyword(s):  
Size Variation ◽  
Principal Component ◽  
Head Region ◽  
Body Depth ◽  
Morphometric Characters ◽  
Significant Difference ◽  
Snow Trout ◽  
Major River ◽  
Mean Vectors ◽  
Schizothorax Richardsonii

Asala or snow trout (Schizothorax richardsonii, Cyprinidae), one of highly valued freshwater fish of Transhimalayan regions, is distributed in upper reaches of all major river systems of Nepal. Morphometric diversification between six river populations of S. richardsonii was examined to identify intraspecific unit for enabling better management of the resources. Significant differences were observed in 17 measured morphometric characters of 207 specimens among the six river populations. Multivariate analysis of variance (Wilks' test) indicated a significant difference for mean vectors of mophometric measurements (? =0.012, F85, 731 = 19.999, P<0.0001) among populations. Principal component and discriminant functions (DFs) analysis of morphometric measurements revealed high seperation of the stocks. The analysis showed that most of the shape and size variation among these populations occurs in the head region, body depth and fin length. Apparent morphometric divergence among S. richardsonii samples showed the existence of three differentiated groups viz., the Indrawati and Khudi populations, the Melamchi and Phalaku Rivers, and the Sabha and Tadi River populations of Nepal. The results of this study may be useful in fisheries management and potential exploitation of this species in coldwater aquaculture.Int J Appl Sci Biotechnol, Vol 3(3): 464-473

scholarly journals Allometric Growth Patterns of Body and Carcass Components in Ardhi Goat

2013 ◽  
Vol 5 (5) ◽  
pp. 183-189 ◽  
Author(s):  
A. Al-Owaimer ◽  
G. Suliman ◽  
A. El-Waziry ◽  
H. Metwally ◽  
M. Abouheif
Keyword(s):  
Growth Patterns ◽  
Allometric Growth
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