Maximum weight of Siberian taimen Hucho taimen (Pallas) in its range

Fisheries ◽  
2021 ◽  
Vol 2021 (1) ◽  
pp. 47-51
Author(s):  
Sergei Zolotukhin ◽  
Ilya Sherbovich
Keyword(s):  
Body Length ◽  
Sea Of Okhotsk ◽  
Extreme Values ◽  
Good Condition ◽  
Maximum Size ◽  
Small Population ◽  
Scientific Publications ◽  
Hucho Taimen ◽  
Age Range ◽  
Maximum Body

In most western regions, Siberian taimen has become a rarity in its range. At present, only a few refugiums of the Siberian and Far Eastern rivers still have groups of Siberian taimen, where fish of the maximum size are recorded. In the east of its range, the rivers that flow into the southern part of the Sea of Okhotsk: The Amur, Uda and Tugur, are the few areas where the Siberian taimen groups are still preserved in good condition in uninhabited places. On the example of p. Tugur (Tuguro-Chumikansky district of the Khabarovsk Territory, Sea of Okhotsk), where there are no roads and a small population, the authors studied the local grouping of Siberian taimen, where individuals of maximum size are still not uncommon. The remaining areas of the range are considered according to scientific publications. Fish of the maximum size are very rare, which is logical: the number of extreme values of the size-age range is minimal. In 2007-2018, in the Tugur River, individuals aged 6-10 years were the maximum (27.6%), and 31-35 years – the minimum (0.9%) of the age range. The archives of the sport fishing base in the Tugur River basin for 2008-2020 showed that the maximum body length of the Siberian taimen was 165 cm, and the maximum body weight was 51.12 kg. Neither in the era of black-and-white photography, nor in the era of video, there is no documentary evidence of the Siberian taimen with a body length of more than 170 cm.

Pleomerism, the Widespread Tendency Among Related Fish Species for Vertebral Number to be Correlated with Maximum Body Length

1975 ◽  
Vol 32 (12) ◽  
pp. 2453-2469 ◽  
Author(s):  
C. C. Lindsey
Keyword(s):  
Body Length ◽  
Fish Species ◽  
Population Biology ◽  
Maximum Size ◽  
Maximum Length ◽  
Latitudinal Gradients ◽  
Vertebral Number ◽  
Sea Snakes ◽  
The Relationship ◽  
Maximum Body

Data for 3137 fish species were analyzed for possible correlations, among related species, between mean vertebral number (V) and maximum recorded body length (L). Of 118 families having counts for over 4 species, 90 show a positive correlation; statistically significant correlations are positive in 45 and negative in only 2 families. The relationship can be expressed by the power function V = CLm, in which C and m are constants characteristic of each family or taxon. Among families with a significant correlation between V and L, the median value of m is 0.12 (representing about 10% vertebral increase for each doubling of length) but m ranges widely, from −0.033 to +0.416. Families with high mean vertebral counts tend to have high m values. The phenomenon, termed pleomerism, occurs within genera as well as within families, and sometimes between races, between populations, or even between the sexes. It exists in widely different shapes of fishes (e.g. sharks, mackerels, sea horses, sand lances, and lumpfish), and in caecilians and in sea snakes. Latitudinal gradients in vertebral number (Jordan’s rule) are often reinforced by pleomerism coupled with latitudinal gradients in maximum length, but gradients in vertebral numbers persist even when effect of maximum length is removed. Although its cause is unknown, pleomerism is taxonomically useful in predicting adult sizes of species known only from young specimens, and in unmasking synonymies of "species" based on young of other named species. Vertebral number considered in conjunction with maximum size is more reliable for making taxonomic judgments at all levels than is vertebral number alone. Moreover, if the cause of pleomerism is functional, it may provide information on locomotory mechanisms and on population biology, since mean vertebral number in each population may be matched to that body size at which selection operates most significantly.

scholarly journals Probable Maximum Sizes of Inclusions Predicted by SEV and PSD for BH Steels of Automobile Exposed Panel with Different Sulfur Contents

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 637
Author(s):  
Xiaoqian Pan ◽  
Jian Yang
Keyword(s):  
Size Distribution ◽  
Exponential Function ◽  
Molten Steel ◽  
Extreme Values ◽  
Maximum Size ◽  
Low Carbon ◽  
Number Density ◽  
Bake Hardening ◽  
High Number Density ◽  
Large Size

This study attempted to estimate the maximum size of inclusions in the ultra-low carbon Bake Hardening (BH) steels of automobile exposed panel. The Probable Maximum Sizes (PMS) of inclusions at the different steelmaking stages for BH steel with different sulfur contents were predicted by two methods of Statistics of Extreme Values (SEV) and Particle Size Distribution (PSD). The S content does not show a relationship with the PMS prediction of inclusions in the molten steel in which Al2O3 is the main inclusion, while the higher content of S leads to a larger PMS value in the slab, due to more number of large-sized Al2O3-MnS inclusions formed during solidification. The PMS value in the slab is greater than that in the molten steel for BH steel. Thus, the PMS of inclusions in the slab cannot be estimated from the molten steel samples. The SEV can be used to predict well the PMS values at different steelmaking stages for BH steels. However, the PSD of exponential function cannot predict well the PMS value in the slab for BH steel when considering all kinds of inclusions due to the large influence of small-sized MnS with high number density on the PSD of exponential function. When only considering Al2O3-MnS inclusions, the PSD of exponential function can make a reasonable PMS prediction in the slab, because the size distribution of Al2O3-MnS with large size can follow the exponential function.

scholarly journals Principal component regression of the morphostructural traits of West African dwarf sheep

2021 ◽  
Vol 43 (1) ◽  
pp. 62-71
Author(s):  
A. A. B ello-Ibiyemi ◽  
M, Wheto ◽  
A. S. Adenaike ◽  
J. S. Decampos ◽  
D. O. Ogunlakin ◽  
...  
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Principal Component Regression ◽  
Principal Component ◽  
West African ◽  
Linear Type ◽  
West African Dwarf ◽  
Component Solution ◽  
Eigen Values ◽  
Age Range

Evaluation of body weight and seven morphostructural traits (body length, wither's height, rump height, fore cannon bone length, chest depth, hip width and hearth girth) of 200 West African dwarf (WAD) sheep of age range 0-1, 1-2, 2-3 and 3-4 was used in determining age and sex effects using General linear model procedure. The sheep were traditionally managed in flocks of southern and north central Nigeria. Interdependence magnitude (redundancy) was estimated to be positive and significant through pearson's correlation estimates between body weight and linear body dimensions (r = 0.04 - 0.81, P<0.01). Among the linear type traits, highest correlation was observed between body weight and hearth girth in males (r = 0.85) and females (r = 0.81) respectively. Multicollinearity contrast at variance inflation factor (VIF) threshold 3.0 was found to be most associated with rump height, hearth girth and body length; with low tolerance modules. Collinearity effects were further orchestrated with computations of eigen values, condition indexes and variance proportions. The component solution through VARIMAX orthogonal rotation generated one principal component for WAD sheep of age range 0-2 years, and two principal components for age range 2-4 years, The principal component based on regression models revealed, body weight was best predicted from heart girth, and combination of rump height and wither's height measurements.

Alternative Child Care in France: Advances in the Study of Motor, Interactive, and Social Behaviors of Young Children in Settings Allowing Them to Move Freely in a Group of Peers

PEDIATRICS ◽  
1993 ◽  
Vol 91 (1) ◽  
pp. 253-263
Author(s):  
Hubert Montagner ◽  
Gérard Gauffier ◽  
Bernard Epoulet ◽  
Albert Restoin ◽  
Robert Goulevitch ◽  
...  
Keyword(s):  
Motor Skills ◽  
Social Behaviors ◽  
Standing Position ◽  
Scientific Publications ◽  
The Third ◽  
Multimodal Interactions ◽  
Clinical Observations ◽  
Complex Forms ◽  
Third Dimension ◽  
Age Range

This paper reports new data on the emergence and development from the 9th to 19th month of age of motor, interactive, and social behaviors of 17 children with peers in a milieu that allows the "conquest" of the third dimension of space without limitation of their motor activity. Their motor skills and social behaviors appear more precocious and complex than previously indicated by scientific publications, clinical observations, and developmental scales. 1. The motor skills that allow the "conquest" of climbing structures (ascents of a spiral staircase and a ramp) are already observed before the age of 12 months in some children (ascents of the ramp) or nearly half of them (ascents of the staircase). Complex social behaviors (multimodal interactions from here and there along a holed partition, imitations, cooperations, anticipation of the behavior of the partner) also emerge before 12 months. 2. The age range from 12 to 14 to 15 months is characterized by consolidation of the motor skills that allow the "conquest" of the third dimension of the space and a rapid increase of the imitations and interactions around the holed partition. 3. The age range from 14 to 18 months is characterized by diversification of the posturomotor patterns during ascents and descents of staircase and ramp and the growing predominance of the standing position. This is also a phase of significant increase in frequency of imitations and cooperations and of emergence of complex forms of cooperation. 4. Aggression is infrequent at all ages.

scholarly journals Effects of allometry, productivity and lifestyle on rates and limits of body size evolution

2013 ◽  
Vol 280 (1764) ◽  
pp. 20131007 ◽  
Author(s):  
Jordan G. Okie ◽  
Alison G. Boyer ◽  
James H. Brown ◽  
Daniel P. Costa ◽  
S. K. Morgan Ernest ◽  
...  
Keyword(s):  
Body Size ◽  
Generation Time ◽  
Allometric Scaling ◽  
Empirical Work ◽  
Morphological Diversity ◽  
Maximum Size ◽  
Scaling Exponent ◽  
Size Evolution ◽  
Body Size Evolution ◽  
Maximum Body

Body size affects nearly all aspects of organismal biology, so it is important to understand the constraints and dynamics of body size evolution. Despite empirical work on the macroevolution and macroecology of minimum and maximum size, there is little general quantitative theory on rates and limits of body size evolution. We present a general theory that integrates individual productivity, the lifestyle component of the slow–fast life-history continuum, and the allometric scaling of generation time to predict a clade's evolutionary rate and asymptotic maximum body size, and the shape of macroevolutionary trajectories during diversifying phases of size evolution. We evaluate this theory using data on the evolution of clade maximum body sizes in mammals during the Cenozoic. As predicted, clade evolutionary rates and asymptotic maximum sizes are larger in more productive clades (e.g. baleen whales), which represent the fast end of the slow–fast lifestyle continuum, and smaller in less productive clades (e.g. primates). The allometric scaling exponent for generation time fundamentally alters the shape of evolutionary trajectories, so allometric effects should be accounted for in models of phenotypic evolution and interpretations of macroevolutionary body size patterns. This work highlights the intimate interplay between the macroecological and macroevolutionary dynamics underlying the generation and maintenance of morphological diversity.

Psyllaphorura jiangsuensis sp. nov. from China (Collembola: Onychiuridae)

Zootaxa ◽  
2007 ◽  
Vol 1510 (1) ◽  
pp. 63-68 ◽  
Author(s):  
HAIJUAN YAN ◽  
CHENG HUANG ◽  
JIAN-XIU CHEN
Keyword(s):  
New Species ◽  
Body Length ◽  
Length Ratio ◽  
Tube Length ◽  
Southeast China ◽  
First Time ◽  
Maximum Body ◽  
Maximum Body Length ◽  
A New Species

The genus Psyllaphorura is reported from China for the first time. A new species, Psyllaphorura jiangsuensis sp. n. as the eighth species of the genus, is described from Nanjing, Southeast China. It is most similar to the Russian species Psyllaphorura martynovae (Stebaeva, 1985) in many respects. However, it can be distinguished from the latter by number of vesicles in the postantennal organ, number of setae on ventral tube, length ratio of unguiculus to unguis, absence of unguiculus basal lamella and maximum body length. A key to all of the species of Psyllaphorura is provided.

The Resistance of Yeast Saccharomyces Cerevisiae to Extreme Conditions

2021 ◽  
pp. 113-118
Author(s):  
Elvira A. Islammagomedova ◽  
Eslanda A. Khalilova ◽  
Rasul Z. Gasanov ◽  
Aida A. Abakarova ◽  
Dinara A. Aliverdieva
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Extreme Values ◽  
Maximum Size ◽  
Surface Color ◽  
Yeast Saccharomyces Cerevisiae ◽  
Wide Range ◽  
Extreme Factors ◽  
Alkaline Conditions ◽  
Biotechnological Processes ◽  
Resistant Strains

The resistance of the yeast Saccharomyces cerevisiae DAW-3а and Y-503 to the conditions of extreme values of pH, NaCl, temperature has been studied. Under different cultivation modes, the rounded shape of DAW-3a cells is pre-served and this parameter Y-503 changes. Under conditions of different pH values and 30°C, the maximum sizes of cells and giant colonies of the polyploid Y-503 strain were found in comparison with the haploid DAW-3a; at 37°C, the advantage of Y-503 was not observed and the colony sizes of both strains were practically the same. The reaction of the strains to critical concentrations of NaCl in the medium was identical: a decrease in the size of cells and colonies was found; change in the shape, surface, color and structure of colonies. Under conditions of the simultaneous influence of an elevated temperature of 37°C, a wide range of pH and 5 % NaCl, the cell size decreased slightly; under neutral and alkaline conditions of cultivation, a slightly greater tolerance of yeast to salt stress was established; a decrease in the size of giant colonies was found, while the maximum size of the studied strains was noted at pH 11.0, the minimum at pH 3.0. The study of the tolerance of the yeast S. cerevisiae DAW-3a and Y-503 to extreme factors is of particular interest in connection with the possibility of using stress-resistant strains in biotechnological processes.

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