Variation in growth and reproduction of walleye (Stizostedion vitreum) in three Manitoba lakes

1995 ◽  
Vol 73 (2) ◽  
pp. 367-372 ◽  
Author(s):  
J. F. Craig ◽  
J. A. Babaluk ◽  
S. G. Stevenson ◽  
P. C. Williams
Keyword(s):  
Egg Production ◽  
Stizostedion Vitreum ◽  
Canadian Prairie ◽  
Asymptotic Size ◽  
Reproductive Life ◽  
Reproductive Life Span ◽  
History Of ◽  
Prairie Lakes ◽  
Different Populations ◽  
Two Populations

Growth, lifetime egg production and biomass, and lipid accumulation in three female populations of walleye (Stizostedion vitreum) were studied. Two populations inhabit large, heavily exploited Canadian prairie lakes and the third inhabits a smaller, cooler, unexploited boreal lake in the Canadian Shield. Fish in the unexploited population grew more slowly and to a smaller asymptotic size than those in the other two populations. Although annual reproductive output per individual was less for this population, the reproductive life-span was greater. Lifetime egg production and ovary lipid biomass per recruit appeared to be similar (within 13%) for female walleye in the three different populations. The significance of energy allocation in the life history of these populations is discussed.

scholarly journals Population structure and genetic history of Tibetan Terriers

2019 ◽  
Vol 51 (1) ◽  
Author(s):  
Mateja Janeš ◽  
Minja Zorc ◽  
Vlatka Cubric-Curik ◽  
Ino Curik ◽  
Peter Dovc
Keyword(s):  
Genetic Relationships ◽  
Snp Array ◽  
Native Population ◽  
Single Nucleotide ◽  
Western Population ◽  
Popular Medium ◽  
Initial Hypothesis ◽  
History Of ◽  
Different Populations ◽  
Two Populations

Abstract Background Tibetan Terrier is a popular medium-sized companion dog breed. According to the history of the breed, the western population of Tibetan Terriers includes two lineages, Lamleh and Luneville. These two lineages derive from a small number of founder animals from the native Tibetan Terrier population, which were brought to Europe in the 1920s. For almost a century, the western population of Tibetan Terriers and the native population in Tibet were reproductively isolated. In this study, we analysed the structure of the western population of Tibetan Terriers, the original native population from Tibet and of different crosses between these two populations. We also examined the genetic relationships of Tibetan Terriers with other dog breeds, especially terriers and some Asian breeds, and the within-breed structure of both Tibetan Terrier populations. Results Our analyses were based on high-density single nucleotide polymorphism (SNP) array (Illumina HD Canine 170 K) and microsatellite (18 loci) genotypes of 64 Tibetan Terriers belonging to different populations and lineages. For the comparative analysis, we used 348 publicly available SNP array genotypes of dogs from other breeds. We found that the western population of Tibetan Terriers and the native Tibetan Terriers clustered together with other Asian dog breeds, whereas all other terrier breeds were grouped into a separate group. We were also able to differentiate the western Tibetan Terrier lineages (Lamleh and Luneville) from the native Tibetan Terrier population. Conclusions Our results reveal the relationships between the western and native populations of Tibetan Terriers and support the hypothesis that Tibetan Terrier belongs to the group of ancient dog breeds of Asian origin, which are close to the ancestors of the modern dog that were involved in the early domestication process. Thus, we were able to reject the initial hypothesis that Tibetan Terriers belong to the group of terrier breeds. The existence of this native population of Tibetan Terriers at its original location represents an exceptional and valuable genetic resource.

Variation in body size and age structure among three Turkish populations of the treefrog Hyla arborea

2012 ◽  
Vol 33 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Nurhayat Özdemir ◽  
Abdullah Altunışık ◽  
Tuğba Ergül ◽  
Serkan Gül ◽  
Murat Tosunoğlu ◽  
...  
Keyword(s):  
Body Size ◽  
Age Structure ◽  
Sexual Size Dimorphism ◽  
Latitudinal Gradient ◽  
Asymptotic Size ◽  
Hyla Arborea ◽  
Size And Age Structure ◽  
Different Populations ◽  
Two Populations ◽  
Main Factor

To determine how climate factors influence age, body size and sexual size dimorphism (SSD) in the Mediterranean region, we generated data on age and body size of the European Treefrog, Hyla arborea, in three Turkish populations with a latitudinal gradient. We estimated age structure (total ), using skeletochronology. Mean body size of both sexes was smaller in a southern population (Antalya) than in northern populations (Çanakkale and Rize) with female-larger SSD in the northern populations. A positive correlation was found between age and body size in each sex of all the populations, save the Antalya females. Since amphibian growth is reduced after maturity but continues towards the asymptotic size, interpopulation size differences may partly be explained by differences in longevity with four years in Antalya and five years in the other two populations. Comparing age and body size in three Turkish populations with those in three different populations (Greece, Switzerland and Germany) from the literature, there was a trend of South-to-North increase in body size with increased latitude and decreased temperature and aridity. The same trend occurred also in age structure (e.g., age at maturity/first reproduction, longevity). These results suggest that a difference in age structure between populations is a main factor for the geographic variation in body size of this species.

The Life-History of Badumna-Candida (Araneae, Amaurobioidea)

1993 ◽  
Vol 41 (5) ◽  
pp. 441 ◽  
Author(s):  
MF Downes
Keyword(s):  
Sex Ratio ◽  
Egg Production ◽  
Production Cycle ◽  
Social Spider ◽  
Social Spiders ◽  
Primary Sex Ratio ◽  
The Social ◽  
The Status ◽  
History Of ◽  
Changes Over Time

A two-year study of the social spider Badumna candida at Townsville, Queensland, provided information on colony size and changes over time, maturation synchrony, temperature effects on development, sex ratio, dispersal, colony foundation, fecundity and oviposition. Key findings were that B. candida outbred, had an iteroparous egg-production cycle between March and October, had an even primary sex ratio and achieved maturation synchrony by retarding the development of males, which matured faster than females at constant temperature. There was no overlap of generations, the cohort of young from a nest founded by a solitary female in summer dispersing the following summer as subadults (females) or subadults and adults (males). These findings confirm the status of B. candida as a periodic-social spider (an annual outbreeder), in contrast to the few known permanent-social spider species whose generations overlap. Cannibalism, normally rare in social spiders, rose to 48% when spiders were reared at a high temperature. This may be evidence that volatile recognition pheromones suppress predatory instincts in social spiders.

scholarly journals HbA1c levels in individuals heterozygous for hemoglobin variants

2017 ◽  
Vol 63 (4) ◽  
pp. 341-346
Author(s):  
Ricardo Silva Tavares ◽  
Fábio Oliveira de Souza ◽  
Isabel Cristina Carvalho Medeiros Francescantonio ◽  
Weslley Carvalho Soares ◽  
Mauro Meira Mesquita
Keyword(s):  
Test Group ◽  
Exchange Chromatography ◽  
Group Method ◽  
Control Group ◽  
Significant Difference ◽  
Hemoglobin Variants ◽  
Different Populations ◽  
And Control ◽  
Two Populations ◽  
Hba1c Levels

Summary Objective: To evaluate the levels of glycated hemoglobin (HbA1c) in patients heterozygous for hemoglobin variants and compare the results of this test with those of a control group. Method: This was an experimental study based on the comparison of HbA1c tests in two different populations, with a test group represented by individuals heterozygous for hemoglobin variants (AS and AC) and a control group consisting of people with electrophoretic profile AA. The two populations were required to meet the following inclusion criteria: Normal levels of fasting glucose, hemoglobin, urea and triglycerides, bilirubin > 20 mg/dL and non-use of acetylsalicylic acid. 50 heterozygous subjects and 50 controls were evaluated between August 2013 and May 2014. The comparison of HbA1c levels between heterozygous individuals and control subjects was performed based on standard deviation, mean and G-Test. Results: The study assessed a test group and a control group, both with 39 adults and 11 children. The mean among heterozygous adults for HbA1c was 5.0%, while the control group showed a rate of 5.74%. Heterozygous children presented mean HbA1c at 5.11%, while the controls were at 5.78%. G-Test yielded p=0.93 for children and p=0.89 for adults. Conclusion: Our study evaluated HbA1c using ion exchange chromatography resins, and the patients heterozygous for hemoglobin variants showed no significant difference from the control group.

scholarly journals Resource‐use, body condition and parasite load metrics indicate contrasting health of stocked and native game fishes in Canadian prairie lakes

2020 ◽  
Vol 28 (1) ◽  
pp. 18-27
Author(s):  
Lushani Nanayakkara ◽  
Elizabeth R. Starks ◽  
Ryan N. Cooper ◽  
Sydney Chow ◽  
Peter R. Leavitt ◽  
...  
Keyword(s):  
Body Condition ◽  
Resource Use ◽  
Parasite Load ◽  
Canadian Prairie ◽  
Prairie Lakes

Reproductive Uncertainty and the Evolution of Iteroparity: Why Don't Flatfish Put All Their Eggs in One Basket?

1981 ◽  
Vol 38 (8) ◽  
pp. 968-977 ◽  
Author(s):  
Derek A. Roff
Keyword(s):  
Reproductive Success ◽  
Life Span ◽  
Intrinsic Rate ◽  
Intrinsic Rate Of Increase ◽  
Rate Of Increase ◽  
Age Of Maturity ◽  
Reproductive Life ◽  
Reproductive Life Span ◽  
Engraulis Ringens ◽  
Using Data

Murphy's hypothesis that variation in reproductive life span is an adaptive response to variation in the predictability of reproductive success is examined. Murphy's contention that this hypothesis explains the variation in reproductive life span within the clupeids is reexamined incorporating further data on the Peruvian anchovy (Engraulis ringens). A nonsignificant correlation is now obtained between reproductive life span and brood strength variation; thus, the hypothesis is called into question. An alternative explanation is presented that considers the interaction between life history parameters: because it is necessary for the intrinsic rate of increase to exceed zero, variation in one parameter must be associated with variation in at least one other parameter. In the clupeids it is noted that the age of maturity and reproductive life span vary in concert and it is suggested that this provides an explanation of variation in reproductive life span. These two hypotheses are examined using data on the family Pleuronectidae, the flatfish. No correlation exists between reproductive life span and the degree of fluctuation in brood strength but there is a significant correlation between reproductive life span and age of maturity. It is concluded that variation in reproductive life span within the flatfish group is not a response to variation in reproductive success but rather a correlate of variation in age of maturity.Key words: flatfish, Pleuronectidae, iteroparity, natural selection, reproduction, clupeids

scholarly journals How many children does Serbia need?

Stanovnistvo ◽  
2004 ◽  
Vol 42 (1-4) ◽  
pp. 29-44 ◽  
Author(s):  
Branislav Djurdjev
Keyword(s):  
Family Planning ◽  
Family Planning Program ◽  
Linear Interpolation ◽  
Parity Progression ◽  
Fertility Rates ◽  
Replacement Level ◽  
Planning Program ◽  
The Third ◽  
Reproductive Life ◽  
Reproductive Life Span

The work is an attempt to determine basic quantities for introducing a family planning program which will be aiming at a replacement level. In order to do that census year 2002 was taken as an example for calculation. Total fertility rate of 2.1 children per woman was considered as necessary level and that means Serbia needs 105.000 newborns each year. In accordance with that level a set of five age specific fertility rates (ASFR) were established in order to find appropriate model of reproductive behavior for Serbia. The sets are established in the following manner: multiplying ASFR by quotient between necessary and real number of newborns, by the data from the last year when fertility was large enough to provide for replacement level (with mortality level from 2002), by linear interpolation between two ASFR models and by Brass fertility polynomial. All five different models of age specific fertility rates suggest that there is no ideal distribution of ASFR. Also parity progression from zero to first, from first to second, and from second to third child is determined. The main reason for below replacement level in Serbia is small parity progression from second to third child. So, rearing the third child should be the most stimulated in every family planning program, as long as every second women have them by the end of her reproductive life span.

scholarly journals Clinical and Immunological Features of Human BCL10 Deficiency

2021 ◽  
Author(s):  
Blanca Garcia Solis ◽  
Ana Van Den Rym ◽  
Jareb J. Pérez-Caraballo ◽  
Abdulwahab Al –Ayoubi ◽  
Lazaro Lorenzo ◽  
...  
Keyword(s):  
Autosomal Recessive ◽  
Respiratory Infections ◽  
Genetic Diagnosis ◽  
Additional Patient ◽  
Hematopoietic Stem ◽  
Recommended Treatment ◽  
History Of ◽  
Different Populations ◽  
Human Immune

Abstract The CARD-BCL10-MALT1 (CBM) complex is critical for the proper assembly of human immune responses. The clinical and immunological consequences of deficiencies in some of its components such as CARD9, CARD11, and MALT1 have been elucidated in detail. However, the scarcity of BCL10 deficient patients prevented gaining that knowledge for this genetic disease. Only two patients with BCL10 deficiency have been reported to date. Here we describe in more depth an additional patient with autosomal recessive BCL10 complete deficiency caused by a nonsense mutation that leads to a loss of expression (K63X). Using mass cytometry coupled with unsupervised clustering and machine learning computational methods, we obtained a thorough characterization of the consequences of BCL10 deficiency in different populations of leukocytes. We showed that in addition to the almost absence of memory B and T cells reported before, this patient display a reduction in NK, gdT, Tregs, and TFH cells. The patient suffered from recurrent respiratory infections since early in life, and showed a family history of lethal severe infectious diseases. Fortunately, hematopoietic stem-cell transplantation (HSCT) cured her. Overall, this report highlights the importance of early genetic diagnosis for the management of BCL10 deficient patients and HSCT as the recommended treatment to cured this disease.

scholarly journals Gene Banks as Reservoirs to Detect Recent Selection: The Example of the Asturiana de los Valles Bovine Breed

2021 ◽  
Vol 12 ◽  
Author(s):  
Simon Boitard ◽  
Cyriel Paris ◽  
Natalia Sevane ◽  
Bertrand Servin ◽  
Kenza Bazi-Kabbaj ◽  
...  
Keyword(s):  
Production Systems ◽  
Cattle Breed ◽  
Time Data ◽  
Gene Banks ◽  
Animal Genetic Resources ◽  
Selection History ◽  
History Of ◽  
Rich Information ◽  
Different Populations ◽  
Candidate Regions

Gene banks, framed within the efforts for conserving animal genetic resources to ensure the adaptability of livestock production systems to population growth, income, and climate change challenges, have emerged as invaluable resources for biodiversity and scientific research. Allele frequency trajectories over the few last generations contain rich information about the selection history of populations, which cannot be obtained from classical selection scan approaches based on present time data only. Here we apply a new statistical approach taking advantage of genomic time series and a state of the art statistic (nSL) based on present time data to disentangle both old and recent signatures of selection in the Asturiana de los Valles cattle breed. This local Spanish originally multipurpose breed native to Asturias has been selected for beef production over the last few generations. With the use of SNP chip and whole-genome sequencing (WGS) data, we detect candidate regions under selection reflecting the effort of breeders to produce economically valuable beef individuals, e.g., by improving carcass and meat traits with genes such as MSTN, FLRT2, CRABP2, ZNF215, RBPMS2, OAZ2, or ZNF609, while maintaining the ability to thrive under a semi-intensive production system, with the selection of immune (GIMAP7, GIMAP4, GIMAP8, and TICAM1) or olfactory receptor (OR2D2, OR2D3, OR10A4, and 0R6A2) genes. This kind of information will allow us to take advantage of the invaluable resources provided by gene bank collections from local less competitive breeds, enabling the livestock industry to exploit the different mechanisms fine-tuned by natural and human-driven selection on different populations to improve productivity.

scholarly journals Concept of Granthi with reference to uterine fibroid: An Ayurveda review

2021 ◽  
Vol 9 (02) ◽  
Author(s):  
Jaya Umate ◽  
Soudamini Chaudhari
Keyword(s):  
Life Span ◽  
Uterine Fibroid ◽  
Uterine Fibroids ◽  
Modern Science ◽  
Reproductive Age ◽  
Significant Morbidity ◽  
Reproductive Life ◽  
Reproductive Life Span ◽  
Gynecological Disease ◽  
Reproductive Age Group

Uterine fibroids are the commonest benign tumor of the uterus and also the commonest benign solid tumor in the female. It can cause significant morbidity in women of a reproductive life span. The exact cause of uterine fibroid is unknown. Prevalence of uterine fibroid 5 -20 % of women in the reproductive age group. It can cause significant morbidity in women of a reproductive life span. Not all fibroids cause symptoms. 50% of women are asymptomatic. Fibroids mainly cause symptoms like menorrhagia, dysmenorrhea and cause pressure symptoms on adjacent viscera i. e. bladder, uterus, rectum which affects the everyday activities of women. In Ayurveda all gynecological disease explained under the term yonivyapad. It can be explained as the anatomical and functional abnormalities of the female reproductive system. In Ayurveda granthi can be correlated with the uterine fibroid. In modern science uterine fibroid treats medically, surgically. But it is challenging to establish a satisfactory conservatory medical treatment to date. so in Ayurveda the main purpose is the management of granthi by samprapti vighatan by use of medicine.

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