Morphological variations of striped seabream, Lithognathus mormyrus, populations along the Tunisian coast

2011 ◽  
Vol 91 (6) ◽  
pp. 1261-1271 ◽  
Author(s):  
Ibtissem Hammami ◽  
Lilia Bahri-Sfar ◽  
Oum Kalthoum Ben Hassine
Keyword(s):  
Function Analysis ◽  
Anterior Part ◽  
Significant Degree ◽  
The Body ◽  
Statistical Analyses ◽  
Ecological Niches ◽  
Meristic Characters ◽  
Morphometric Variation ◽  
Morphological Variations ◽  
Lithognathus Mormyrus

Morphological variations of Tunisian Lithognathus mormyrus populations were investigated using 41 morphometric measurements (27 truss elements and 14 traditional measurements) and eight meristic characters collected from ten marine and lagoon samples. Statistical analyses (e.g. discriminant function analysis (DFA)) performed separately to truss and traditional data revealed a significant degree of morphological dissimilarity of lagoon samples (Bizerta, Ghar El Melh and El Biban lagoons). For these three lagoon environments the overall assignment of individuals into their original sample (percentage classification success) by DFA was 94% for truss elements and 98% for traditional measurements. This morphological discrimination among lagoon samples, revealed with traditional measurements, seems to be associated only with the anterior part of the body (especially with the pre-orbit and snout length). However, for truss analyses, it was explained by both anterior and posterior parts (peduncle region). Statistical analyses for only marine samples showed partial overlapping with significant morphometric variation of the Chebba and Gabès samples mainly related to the anterior part of the body, for the first sample, but also to the posterior region, for the second one. These morphometric variations are often due to environmental conditions and mainly to the exploitation of different ecological niches that are particularly limited by the availability, type and size of prey. Thus, truss and traditional approaches are complementary and provide more accurate explanations of such a morphological discrimination. Meristic character analyses showed homogeneity of striped seabream samples, except for the Ghar El Melh lagoon sample which quietly differed from the others. This distinction was mainly explained by the number of soft anal rays.

scholarly journals Stock identification of Mediterranean horse mackerel (Trachurus mediterraneus) using morphometric and meristic characters

2004 ◽  
Vol 61 (5) ◽  
pp. 774-781 ◽  
Author(s):  
Cemal Turan
Keyword(s):  
Function Analysis ◽  
Eastern Mediterranean ◽  
Anterior Part ◽  
Aegean Sea ◽  
The Body ◽  
Horse Mackerel ◽  
Marmara Sea ◽  
Stock Identification ◽  
Meristic Characters ◽  
Pectoral Fin Rays

Abstract Morphologic differentiation among stocks of Mediterranean horse mackerel, Trachurus mediterraneus, throughout the Black, Marmara, Aegean and Eastern Mediterranean Seas, was investigated using morphometric and meristic characters. Discriminant function analysis of both morphometric and meristic characters suggested that there is restricted migration of mackerel among the adjacent seas. Overlapping of four Black sea samples on the discriminant space in morphometric and meristic characters suggested that there is one self-recruiting population in the area. The Marmara sea samples were the most isolated samples from all others for both morphometric and meristic characters, which may indicate existence of a distinguishable mackerel stock in the area. The sample from the Aegean Sea was grouped with one geographically close Mediterranean sample based on morphometrics, and separated from all other Mediterranean samples based on meristic characters, suggesting some degree of intermingling between these areas. Examination of the contribution of each morphometric variable to canonical functions indicated that differences among samples seemed to be associated with the anterior part of the body. In meristic analyses, highest contributions to canonical functions were associated with the number of gill rakers and pectoral fin rays.

scholarly journals Morphometric and Meristic Characterization of Common Carp, Cyprinus Carpio Strains Sourced from Jos, Bauchi and Ibadan, Nigeria

2019 ◽  
Vol 1 ◽  
pp. 82-87
Author(s):  
O O Jacob ◽  
S G Solomon ◽  
J O Cheikyula
Keyword(s):  
Common Carp ◽  
Cyprinus Carpio ◽  
Function Analysis ◽  
The Body ◽  
Meristic Characters ◽  
Male And Female ◽  
Common Carp Cyprinus Carpio ◽  
Carp Cyprinus Carpio ◽  
Ibadan Nigeria

The study investigated the morphometric and meristic characterization of Common carp (Cyprinus carpio) sourced from Jos Bauchi and Ibadan (Nigeria). In comparing the morphometric and meristic characters one hundred and eighty (180) adult Common carp, Cyprinus carpio were used. Twenty four (24) morphometric and six (6) meristic characters were studied. Measurements of the morphometric features were taken to the nearest centimeter by means of a measuring board, measuring rule, pair of dividers for the length, while the weight was taken by means of a weighing scale (salter scale) to the nearest gram. ANOVA, multivariate technique principal component analysis (PCA) and discriminant function analysis were also applied to the transformed morphometric data to; classify the fish into one or several mutually exclusive groups. The Morphometric study indicated that seven parameters did not differ significantly (p>0.05) between Jos (male and female), and Bauchi (male and Female) strains. The parameters are the body depth, caudal fin length, pectoral fin height, standard weight, pre dorsal distance, eye diameter and body weight. In the meristic count, only the dorsal fin spine did not differ significantly (p >0.05) among the Jos, Bauchi, and Ibadan strains in all sexes. The study revealed that there was a genetic distance between male and female Carp sourced from Ibadan and that of Jos and Bauchi, where as male and female Carp from Jos and Bauchi showed genetic closeness.

scholarly journals Metamorphosis of whitemouth croaker Micropogonias furnieri (Pisces, Sciaenidae)

2020 ◽  
Vol 33 (2) ◽  
pp. 163-182
Author(s):  
Mara Braverman ◽  
Daniel Brown ◽  
E. Marcelo Acha
Keyword(s):  
Developmental Stages ◽  
Anterior Part ◽  
Feeding Activity ◽  
Principal Component ◽  
Morphological Characters ◽  
The Body ◽  
Juvenile Period ◽  
Meristic Characters ◽  
Early Stages ◽  
Micropogonias Furnieri

Fish metamorphosis is an important ontogenetic process with a key role on early stages survival and on successful recruitment to adult populations. The whitemouth croaker (Micropogonias furnieri) is an important commercial resource for the coastal fisheries of Argentina and Uruguay. Metamorphosis, using morphometric and morphological analyses during larval development was studied. Changes in morpho-meristic characters before and after metamorphosis were employed to determine the length interval of this transition by employing Principal Component Analysis. Individuals (n=430) from 4 to 41 mm standard length (SL) were collected in the Río de la Plata estuary (35.45º S, 56.35º W) in March 2006. Length ranges of individual´s developmental stages were associated with the presence of key morphological characters. During early life stages, M. furnieri changes from a big-headed, robust shape larva to a slender and more elongated body form. Most of the morphometric variables showed an inflexion point at 15.2 mm SL, with a 95% confidence interval of 14.0 – 16.4 mm. The anterior part of the body grows faster during early stages, probably related to an intense feeding activity strategy. The completion of pectoral fin rays and the onset of squamation determine the beginning of metamorphosis at 11-12 mm SL. At around 18 mm SL, squamation ends, first barbels develop and the sagittae otolith primordium is closed. The length-at-metamorphosis for M. furnieri was established between 9 to 18 mm SL, since all developmental characters studied highly overlapped at that interval. All those processes are indicative of the beginning of the juvenile period associated to the settlement and the start of a bottom-oriented life-style.

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 Morphological variations in marine pufferfish and porcupinefish (Teleostei: Tetraodontiformes) from Tamil Nadu, southeastern coast of India

2018 ◽  
Vol 10 (13) ◽  
pp. 12726-12737
Author(s):  
K. Kaleshkumar ◽  
R. Rajaram ◽  
P. Purushothaman ◽  
G. Arun
Keyword(s):  
Tamil Nadu ◽  
Multivariate Analyses ◽  
Function Analysis ◽  
Pectoral Fin ◽  
Meristic Characters ◽  
Caudal Peduncle ◽  
Morphological Variations ◽  
Southeastern Coast ◽  
Peduncle Length ◽  
Fin Length

In the present study, morphological variations in 14 species of two families, Tetraodontidae and Diodontidae, were examined for individuals collected from five different centres in Tamil Nadu in the southeastern coast of India.  Twenty-seven morphological measurements and four meristic characters were taken and used for multivariate analyses such as discriminant function analysis (DFA) & MANOVA.  DFA revealed that the first two functions accounted for more than 75% variation between the species.  Negative allometric values were observed on head length (HL), orbital length (OL), pupil diameter (PD), interorbital length (IOL), pectoral-fin length (PEL), caudal peduncle depth (CPD), dorsal to pectoral fin distance (DPFD), caudal peduncle length (CPL) and post-pectoral-fin length (POPFL) measurements.  Also, MANOVA supported the DFA results.  Additions, allometric relationships, and meristic variations were observed for most of these species.   Moreover, this is the first attempt to describe a greater number of morphological features of the species belonging to the order Tetraodontiformes.

scholarly journals The dynamic of body and brain co-evolution

2021 ◽  
pp. 105971232199468
Author(s):  
Paolo Pagliuca ◽  
Stefano Nolfi
Keyword(s):  
Morphological Traits ◽  
The Body ◽  
Morphological Variations ◽  
And Control ◽  
Selection Of

We introduce a method that permits to co-evolve the body and the control properties of robots. It can be used to adapt the morphological traits of robots with a hand-designed morphological bauplan or to evolve the morphological bauplan as well. Our results indicate that robots with co-adapted body and control traits outperform robots with fixed hand-designed morphologies. Interestingly, the advantage is not due to the selection of better morphologies but rather to the mutual scaffolding process that results from the possibility to co-adapt the morphological traits to the control traits and vice versa. Our results also demonstrate that morphological variations do not necessarily have destructive effects on robots’ skills.

scholarly journals Morphological Variations of Wild Populations of Brycon dentex (Characidae, Teleostei) in the Guayas Hydrographic Basin (Ecuador). The Impact of Fishing Policies and Environmental Conditions

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1901
Author(s):  
Ana Gonzalez-Martinez ◽  
Carmen De-Pablos-Heredero ◽  
Martin González ◽  
Jorge Rodriguez ◽  
Cecilio Barba ◽  
...  
Keyword(s):  
Discriminant Analysis ◽  
Environmental Conditions ◽  
Anthropogenic Activity ◽  
Freshwater Species ◽  
Fishing Pressure ◽  
Wild Populations ◽  
Morphometric Variation ◽  
Morphological Variations ◽  
Body Development ◽  
The Impact

The Guayas, located in Ecuador, is the largest basin in the Pacific Ocean and has an inventory of 123 native freshwater species. Most of these are endemic species that are threatened or at-risk due to anthropogenic activity and the modification, fragmentation, and destruction of habitats. The aim of this study was to determine the morphometric variation in three wild populations of Brycon dentex in the Guayas basin rivers and their connections to fishing management and environmental conditions. A total of 200 mature fish were captured, and 26 morphometric parameters were measured. The fishing policies (Hypothesis 1) and environmental conditions (Hypothesis 2) were considered fixed factors and were validated by t-tests. The morphological variation among the three populations (Hypothesis 3) was validated through a discriminant analysis. Fishing policies and resource management were found to generate morphological differences associated with body development. In addition, the environmental conditions were found to influence the size and structure of Brycon dentex populations. The analyzed populations were discriminated by the generated morphometric models, which differentiated Cluster 1 (Quevedo and Mocache rivers) with high fishing pressure from Cluster 2 (Pintado river) with medium–low fishing pressure. Morphometric differentiation by discriminant analysis is a direct and economic methodology that can be applied as an indicator of diversity maintenance.

scholarly journals Surgical Hemostasis for Severe Multisystem Pelvic Injuries

2020 ◽  
Vol 8 (4) ◽  
pp. 396-408
Author(s):  
I. V. Kazhanov ◽  
A. Y. Demko ◽  
V. A. Manukovsky ◽  
S. I. Mikityuk ◽  
V. A. Reva ◽  
...  
Keyword(s):  
Pelvic Ring ◽  
Anterior Part ◽  
Treatment Algorithm ◽  
Pelvic Trauma ◽  
Balloon Occlusion ◽  
The Body ◽  
Military Surgery ◽  
Transfusion Therapy ◽  
Homogeneous Groups ◽  
Military Medical Academy

For the treatment of patients with severe multysistem pelvic trauma accompanied by pelvic bleeding, many algorithms have been proposed that have different procedures for the use of various methods of surgical hemostasis, but none of them may guarantee the complete arrest of pelvic bleeding. The purpose of this study was to estimate clinical efficacy and developed algorithm, aimed at timely diagnosis of intrapelvic bleeding and its complete arrest with the help of different methods of surgical hemostasis in patients with severe concomitant injury of the pelvis. The article analyzes the results of treatment of 168 patients with unstable pelvic ring injuries and signs of intrapelvic bleeding, who were treated in two trauma centers of the first level in St. Petersburg: I.I. Dzhanelidze St. Petersburg Research Institute of Emergency Medicine and Military Surgery Clinic of S.M. Kirov Military Medical Academy in 2010-2018. The victims were divided into two statistically homogeneous groups. In the comparison group (75 people), the pelvic ring was mechanically stabilized with the Ganz C-clamp or the anterior part of the pelvis was fixed with an external fixation device (EFD), and the arrest of the ongoing pelvic bleeding was expected due to occur due to the effect of biological tamponade. In the main group (93 people), after mechanical stabilization of the pelvic ring, various methods of surgical hemostasis were used: balloon occlusion of the aorta, pelvic tamponade, angiography with embolization. The choice of method for surgical haemostasis after trauma depended on the severity of the affected condition of hemodynamic parameters, availability of life-threatening consequences of damage to other areas of the body and the efficacy of previously applied method for intrapelvic bleeding arrest. The introduction of modern diagnostic and treatment algorithm, aimed at complete hemostasis in patients with ongoing intrapelvic bleeding reduced the overall mortality rate by 1.7 times, mortality within 24 hours of admission by 2.3 times, as well as the duration and the volume of blood transfusion therapy by 3 and 1.8 times.Authors declare lack of the conflicts of interests.

Correlation between the Minimal Cross-Sectional Area of the Nasal Cavity and Body Surface Area: Preliminary Results in Normal Patients

2002 ◽  
Vol 16 (4) ◽  
pp. 209-213 ◽  
Author(s):  
Martin Jurlina ◽  
Ranko Mladina ◽  
Krsto Dawidowsky ◽  
Davor Ivanković ◽  
Zeljko Bumber ◽  
...  
Keyword(s):  
Surface Area ◽  
Body Surface Area ◽  
Body Surface ◽  
Anterior Part ◽  
Inferior Turbinate ◽  
Objective Evaluation ◽  
Cross Sectional Area ◽  
The Body ◽  
Sectional Area ◽  
Cross Sectional

Nasal symptoms often are inconsistent with rhinoscopic findings. However, the proper diagnosis and treatment of nasal pathology requires an objective evaluation of the narrow segments of the anterior part of the nasal cavities (minimal cross-sectional area [MCSA]). The problem is that the value of MCSA is not a unique parameter for the entire population, but rather it is a distinctive value for particular subject (or smaller groups of subjects). Consequently, there is a need for MCSA values to be standardized in a simple way that facilitates the comparison of results and the selection of our treatment regimens. We examined a group of 157 healthy subjects with normal nasal function. A statistically significant correlation was found between the body surface area and MCSA at the level of the nasal isthmus and the head of the inferior turbinate. The age of subjects was not found a statistically significant predictor for the value of MCSA. The results show that the expected value of MCSA can be calculated for every subject based on anthropometric data of height and weight.

THE RHEUMATIC CHILD AND HIS WORLD

PEDIATRICS ◽  
1957 ◽  
Vol 19 (5) ◽  
pp. 916-922
Author(s):  
Iago Galdston
Keyword(s):  
Rheumatic Fever ◽  
External World ◽  
The Body ◽  
Statistical Analyses ◽  
Review Of The Literature ◽  
Question Asking ◽  
Claude Bernard ◽  
The World ◽  
Etiologic Research

IT IS PROVERBIAL that a fool can ask more questions than a wise man can answer. It is not proverbial that for the question-asking fool there is some hope and for the others, none. Now it is my intention on this occasion to play the fool awhile, to ask a great number of questions, and I cordially invite you to join me in this game. I want to inquire into The World of the Rheumatic Child, into his internal as well as into his external world, or, as Claude Bernard has phrased it, into his milieu interieur and into his milieu exterieur. Now there is some method to my folly, and it amounts to this. We know a great deal about the disease rheumatic fever and about its devastating effects within the body of its victim. But we do not know a great deal, indeed only a very little, about the victim within whose body the disease effects its devastations. I said—we know a great deal about the disease itself. In preparation for this talk I "re-surveyed the literature" and I found it, as I have known it to be, not only enormous in quantity but most impressive in quality. It is literally studded with masterpieces of etiologic research, of clinical surveys, of pathologic studies, of follow-up surveys, of epidemiologic analyses, and of therapeutic enterprises. In my review of the literature I came upon some old and esteemed friends whose works I had witnessed "in the making," the studies, for example, of Wyckoff, and those of Alfred Cohn; Claire Ling's penetrating statistical analyses, Pearl Raymond's biologic speculations, May Wilson's classical and encyclopedic résumé of knowledge—and upon a host of others, too numerous, really, to catalogue.

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