scholarly journals [NO TITLE AVAILABLE]

2007 ◽  
Vol 67 (4) ◽  
pp. 707-713 ◽  
Author(s):  
V De Conto ◽  
R Cerqueira
Keyword(s):  
Sexual Dimorphism ◽  
Litter Size ◽  
Post Partum ◽  
Growth Curves ◽  
Gompertz Model ◽  
Significant Negative Correlation ◽  
Gestation Length ◽  
Significant Difference ◽  
In Captivity ◽  
Males And Females

The reproduction, development and growth of Akodon lindberghi were studied in captivity. The colony was derived from animals captured in Simão Pereira, Minas Gerais state, which represents a new area of geographical distribution known for this species. Twelve males and twelve females were crossed, producing 144 young in 53 litters. Post-partum oestrus was observed and gestation length was estimated in 23 days. Litter size ranged from 1 to 4 with a mean of 2.72 (SD = 0.97, n = 53) and modal size of 3. Sexual dimorphism was neither present in body mass at birth nor at weaning. There was a significant negative correlation between litter size and mass at birth or weaning. Permanent emergence of adult external appearance occurred at 15 days. Puberty for males and females was 43 and 42 days, respectively, and the first fecundation event for two females was recorded at 47 and 54 days of age. The weight growth was described by fitting a Gompertz model. No significant difference was found in any parameter of growth curves for males and females. Measurements (head-body, tail, hind foot and internal and external ear lengths) obtained for adult individuals also did not reveal the presence of sexual dimorphism.

scholarly journals Nonlinear models of Brazilian sheep in adjustment of growth curves

2018 ◽  
Vol 63 (No. 8) ◽  
pp. 331-338 ◽  
Author(s):  
Paz Claudia Cristina Paro de ◽  
Venturini Guilherme Costa ◽  
Contini Enio ◽  
Costa Ricardo Lopes Dias da ◽  
Lameirinha Luara Paula ◽  
...  
Keyword(s):  
Body Weight ◽  
Repeated Measures ◽  
Nonlinear Models ◽  
Logistic Models ◽  
Growth Curves ◽  
Gompertz Model ◽  
Linear Quadratic ◽  
Significant Difference ◽  
Biological Interpretation ◽  
Males And Females

Growth curves of the Morada Nova sheep males and females were described using nonlinear models and the relationships between body weight and thoracic circumference were evaluated. Altogether 1516 repeated measures of body weight and thoracic circumference of the Morada Nova sheep (668 males and 848 females) taken since birth till 730 days of age were used. The Brody, Richards, von Bertalanffy, Gompertz, and Logistic models have been tested. The Fisher’s test (F) was used to verify the differences (P &lt; 0.05) in growth curves between males and females. The Gompertz model presented a significant difference (P &lt; 0.001) for growth curve parameters between males (asymptotic weight (A) = 40.5 kg and maturing rate (k) = 0.0043 kg/day) and females (A = 36.44 kg and k = 0.0028 kg/day). The relationships between body weight and thoracic circumference presented R<sup>2</sup> above 0.7 and a high significance (P &lt; 0.0001) for all categories, showing that the thoracic circumference may be a good indicator of body weight. In addition, a significant effect (P &lt; 0.05) of the relationship between thoracic circumference and prediction of animal’s body weight was verified using the models of linear, quadratic, and cubic regression. Among the models studied, the Gompertz model presented the best fit and biological interpretation. Furthermore, the Gompertz model indicated the need to separate animals by sex in order to properly meet nutritional requirements and determine adequate slaughter age. Thoracic circumference can be used to predict animal body weight with a high accuracy.

Reproductive Biology and Development of the Water Rat, Hydromys chrysogaster, in Captivity

1982 ◽  
Vol 9 (1) ◽  
pp. 39 ◽  
Author(s):  
PD Olsen
Keyword(s):  
Breeding Season ◽  
Developmental Stages ◽  
Post Partum ◽  
Growth Curves ◽  
Gestation Length ◽  
Body Measurements ◽  
Sperm Production ◽  
Crown Rump Length ◽  
Rate Of Increase ◽  
Hydromys Chrysogaster

In a captive colony of H. chrysogaster most litters were born between September and March, although some were born in every month except June. Most females had regular oestrous cycles in the breeding season but there were isolated instances of oestrus in every month. In mature males, testes were scrota1 and there was full sperm production all year. There was some regression in weight of male accessory reproductive glands in the autumn and winter. Oestrus lasted 10 days (range 7-17), and its stages: pro-oestrus 1 day, oestrus 2 days, metoestrus 2 days, anoestrus 5 days. Some instances of delayed implantation were suspected. Gestation length was 34 days (33-41). Parturition was followed the next day by a postpartum oestrus, lasting 1 day. Lactation anoestrus was at least 3 weeks. Litter size was 3.29 � 1.26 (1-7) and the number of litters per breeding season was 2.6 � 0.97 (1-5). In the latter half of pregnancy there was a linear relationship between the crown-rump length of foetuses and gestation length. Young were born naked, blind and with the pinnae folded forward with edges attached to the head. The upper incisors emerged at 4 days, the lower incisors at 6 days, the auditory meatus opened at about 10 days, the eyes opened at about 14 days, some solids were eaten and young were more independent at about 3 weeks of age, and they were weaned at about 29 days. Phases in the rate of increase in weight were associated with each of these developmental stages. Females were first capable of breeding at 124 days (433 g); most matured about 240 days in the season following that of their birth. The testes descended in males between 90 and 120 days (475 g) but full sperm production did not occur until about 130-140 days. Females could breed for three seasons (until about 3.5 y old). Placental scars were visible for up to 6 months, but had sometimes disappeared at 4 months post partum. Growth curves of tail and weight were sigmoid, and those of other body measurements were exponential, as in the Rattus group of Australian rodents, and differing from the pseudomyine rodents. Body measurements showed a sigmoid relationship to the linear equivalence of body weight. Developmental events occurred earlier, in relation to growth, in Hydromys and Rattus lutreolus than in Pseudomys novaehollandiae.

Growth of the Eastern Quoll, Dasyurus viverrinus (Shaw), (Marsupialia) in Captivity

1984 ◽  
Vol 11 (1) ◽  
pp. 21 ◽  
Author(s):  
JC Merchant ◽  
K Newgrain ◽  
B Green
Keyword(s):  
Litter Size ◽  
Adult Female ◽  
Growth And Development ◽  
Mammary Glands ◽  
Adult Females ◽  
In Captivity ◽  
Molar Teeth ◽  
Males And Females ◽  
At Will

The growth and development, from 10 to 270 days old, of eastern quolls in a captive colony was recorded. Young were able to detach from the teat by 65 days of age and their eyes were open by 80 days. Statistically significant differences in some measurements from males and females were found as early as 85 days of age. The weaning period commenced at 102 days ofage, and coincided with eruption ofthe first molar teeth. Total independence, determined by the cessation of lactation in the mother, was as early as 142 days in litters of one or as late as 200 days in larger litters. There was a high correlation between litter size and age at independence. Lactation was maintained in all previously suckled mammary glands of adult females after the death of young aged 65 days or over if some siblings remained. This was due to the ability of young of this age to detach and reattach to the teats at will. The implication of this observation is that the commonly held view that the numbers of surviving young in marsupial litters corresponds to the number of lactating teats in the adult female may not always be correct.

Reproductive attributes of local pig (Votho) of Nagaland, India

2016 ◽  
Author(s):  
N. Savino ◽  
Z. Chusi ◽  
A. Dhali ◽  
P. Perumal
Keyword(s):  
Mortality Rate ◽  
Litter Size ◽  
Field Survey ◽  
Gestation Length ◽  
Reproductive Parameters ◽  
Litter Weight ◽  
Significant Difference ◽  
Size At Birth ◽  
Selection Of ◽  
Age At First Farrowing

The present study was conducted to measure the reproductive attributes of Naga local pigs (Votho) in Kohima, Peren and Phek district of Nagaland. The reproductive parameters were measured through field survey and reproductive records of owner. The reproductive parameters such as age at first fertile service (AFFS), age at first farrowing (AFF), gestation length, farrowing interval, litter size at birth, litter size at weaning, litter weight at birth, litter weight at weaning, mortality rate and stillbirth rate were measured. The result revealed that there was a significant difference among the different districts of Nagaland in AFFS, AFF and litter weight at birth. Parameters such as AFFS, AFF and litter weight at birth were significantly higher and gestation length, farrowing interval, litter size at weaning, litter weight at birth, litter weight at weaning were non-significantly higher in Kohima than in Peren and Phek District. Similarly, parameters such as litter size at birth, mortality rate were non-significantly higher in Peren district and stillbirth was non- significantly higher in Phek district than other districts of Nagaland. These reproductive attributes analyses may be useful in selection of breeding stock for future parents and select the place for breeding programme for indigenous local Naga pigs.

scholarly journals The Diet and Sexual Differences of the Caspian Bent-Toed Gecko,Tenuidactylus caspius(Squamata: Gekkonidae), in Northern Iran

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Vida Hojati ◽  
Reza Babaei Savasari
Keyword(s):  
Sexual Dimorphism ◽  
Culex Pipiens ◽  
Tail Length ◽  
Adult Males ◽  
Northern Iran ◽  
Widespread Distribution ◽  
Adult Females ◽  
Significant Difference ◽  
Males And Females ◽  
Prey Items

The Caspian bent-toed gecko,Tenuidactylus caspius, is one of the most common nocturnal lizards of Iran with widespread distribution especially in the northern provinces. This research was done in order to study the diet and sexual dimorphism of this species in Sari County from 5 May to 20 October. During this research, 40 specimens of them including 20 males and 20 females were studied for diet and 140 specimens including 70 adult males and 70 adult females were studied for sexual dimorphism. Prey items identified were insects that belong to 15 species of 8 families and 6 orders. The most common prey items wereCulex pipiensandMusca domestica. There is no significant difference between diets of males and females. Results show that the adult males in addition of having the apparent femoral and preanal pores are heavier than females and have larger body, head, and tail length.

scholarly journals EFFECTS OF SEASON AND LITTER SIZE ON GESTATION LENGTH IN SWINE

2021 ◽  
Vol 4 (1) ◽  
pp. 43-51
Author(s):  
G. N. Egbunike ◽  
J. Steinbach
Keyword(s):  
Litter Size ◽  
Negative Correlation ◽  
Significant Negative Correlation ◽  
Seasonal Effect ◽  
Gestation Length ◽  
Large White ◽  
Mean Values ◽  
The Mean

488 gestations (309 Large White and 179 Landrace) and the size of all litters resulting from services which occurred between January 1967 and March 1970 were analysed. The mean gestation length was 113.96 days for the Large White and 113.74 days for the Landrace while the mean values for the litter size were 9.14 and 9.58 respectively. There was a significant negative correlation between these two traits in both breeds (P 0.01). A slight and non-significant seasonal effect (P 0.10) was shown with the highest and lowest gestation lengths being recorded in July (114.38 days) and in January and February (113.40 days). Breed effect and interaction between breed and season were also not significant.

scholarly journals A Sense of Harassment and its Relationship to the Level of Professional Educational Adjustment among a Sample of Employees in the Directorate of Education in Damascus

2017 ◽  
Vol 11 (2) ◽  
pp. 278
Author(s):  
Raghdaa A. Naiseh
Keyword(s):  
Negative Correlation ◽  
Analytical Approach ◽  
Significant Negative Correlation ◽  
Female Workers ◽  
Significant Difference ◽  
Government Education ◽  
Institutional Sector ◽  
Males And Females ◽  
Level Of Significance ◽  
The Relationship

The study aimed to identify the level of a sense of harassment among a sample of workers and institutional sector of government education. It defines the professional level of compatibility among a sample of workers in farming Damascus Directorate. And the study of the relationship between the sense of harassment and professional compatibility among a sample of workers in farming Damascus Directorate. And to identify the level of significance of differences in the answers to the study sample the sense of harassment and scale professional compatibility scale according to the variables of the study: (sex, and marital status), and has been relying on the descriptive and analytical approach, and used two tools of the study: a sense of harassment measure, and the measure of professional compatibility, and amounted to a sample study (144) factor and running in working in the farming Damascus Directorate. Among the most important findings of the study were: The level of the sense of harassment among workers in the Directorate of Education in Damascus was moderate; the professional level of compatibility among workers in the Directorate of Education in Damascus was moderate; a statistically significant negative correlation between the sense of harassment and the professional compatibility; the presence of statistically significant difference between males and females on the sense of harassment and in favor of male workers; a statistically significant difference between the average of married and non-married on harassment and in favor of non-married employees; a statistically significant difference between the average of males and females on the compatibility and in favor of female workers. There was no statistically significant difference between the average married and non-married on the compatibility scal

scholarly journals Calomys laucha (Rodentia, Cricetidae): growth and breeding in laboratory conditions

1989 ◽  
Vol 23 (4) ◽  
pp. 340-344 ◽  
Author(s):  
V. L. Hodara ◽  
M. B. Espinosa ◽  
M. S. Merani ◽  
C. Quintans
Keyword(s):  
Body Weight ◽  
Birth Rate ◽  
Growth Curves ◽  
Reproductive Efficiency ◽  
Gestation Length ◽  
Cumulative Mortality ◽  
Laboratory Conditions ◽  
In Captivity ◽  
Pup Survival ◽  
Calomys Laucha

The husbandry and breeding of Calomys laucha (Rodentia, Cricetidae) in captivity are described. Growth curves based on body weight and length showed statistical differences between sexes after 45 days, males being heavier than females. The overall reproductive efficiency was 53·4% but birth rate was depressed during winter. Gestation length was 21±1 days and females exhibited postpartum oestrus with a 3-7 day implantation delay (51%). Litter size was 5·3×1·1 ( n=34). Pup survival at weaning was 84·9%. Mean life span in laboratory conditions was 13·5 months and a cumulative mortality of 90% was reached at 27-28 months of age.

Concurrent lactation and reproductive performance in CFLP mice mated post partum

1981 ◽  
Vol 15 (3) ◽  
pp. 273-275 ◽  
Author(s):  
M. L. Norris ◽  
C. E. Adams
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Post Partum ◽  
Gestation Length

Fertility of nursing CFLP mice mated post partum was high (87%) and unaffected by the number of young suckled. Gestation length and litter size were positively correlated with the number of young nursed.

scholarly journals Evaluation of the production characteristics of the Jamunapari goat and its adaptability to farm conditions in Bangladesh

1970 ◽  
Vol 27 (1) ◽  
pp. 26-35 ◽  
Author(s):  
MR Hassan ◽  
MAI Talukder ◽  
S Sultana
Keyword(s):  
Body Weight ◽  
Litter Size ◽  
Milk Yield ◽  
Post Partum ◽  
Milk Composition ◽  
Gestation Length ◽  
Average Growth ◽  
Stage Of Lactation ◽  
Lactation Length ◽  
Average Body

The growth rate, milk yield, milk composition and reproductive efficiency ofJamunapari goats were studied under semi-intensive conditions. Animals were allowedto graze for 6-7 hours and concentrate (17% CP, 11 MJ/kg DM) at 400g/head/day wasoffered twice daily. No body measurement was different in male and female goats. Theudder was capacious but pendulous. Testis length, breadth and scrotal circumferencewere 17.3 ± 1.5, 11.5 ± 1.7 and 42.4 ± 2.0 cm, respectively. The mean body weight at birthand at 12 months was 1.6 and 21.4 kg, respectively. The average growth rates of male andfemale kids were 59.4 and 48.2g/day, respectively. The overall rate of weight gain washighest in second month and lowest in 11th month. Highest milk yield was in secondmonth and lowest in the fifth month after kidding. Lactation length was 135.4 ± 14.9 and143.9 ± 13.2 days for does suckling one and two kids, respectively. Milk intake to growthratio was 15.6 ± 0.2 and 12.5 ± 0.3 for the litter size of one and two, respectively. Highestmilk fat, lactose and solids not fat (SNF) were in the later stage of lactation, whereasprotein and minerals were similar throughout the lactation. The average age at firstoestrus, age at first pregnancy and age at first kidding were 354.8 ± 17.1, 395.4 ± 29.6 and548.6 ± 68.1 days, respectively. The average number of services per pregnancy was 1.4.The gestation length was 152.8 ± 17.6 days. The average body weight just after kiddingand placenta weight were 26.7 kg and 342.4g, respectively. The overall litter size was 1.8and 32.9, 58.2 and 8.9% of kidding produced single, twins and triplets, respectively. Sexratio was 53.3 male to 46.7% female. Average onset of post-partum oestrus was 51 andinterval from parturition to pregnancy 69.3 days. Production of Jamunapari goats wascomparable with that of the Bengal goats.(Bangl. vet. 2010. Vol. 27, No. 1, 26 – 35)DOI: 10.3329/bvet.v27i1.5912

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