Reproduction in the Proserpine rock-wallaby, Petrogale persephone Maynes (Marsupialia : Macropodidae), in captivity, with age estimation and development of pouch young

1999 ◽  
Vol 26 (5) ◽  
pp. 631 ◽  
Author(s):  
Peter M. Johnson ◽  
J. Steven C. Delean
Keyword(s):  
Polynomial Growth ◽  
Age Determination ◽  
Embryonic Diapause ◽  
Linear Mixed Effects ◽  
In Captivity ◽  
Growth Equations ◽  
The Mean ◽  
The Relationship ◽  
Age Prediction

Reproduction in the Proserpine rock-wallaby, Petrogale persephone, was studied in captivity. Sexual maturity, defined as age at first fertility, was attained at 20.5 months in females whereas males were not mature until 24.8 months. P. persephone is capable of breeding throughout the year. The length of the oestrous cycle was 33–38 days, while the period of gestation was 30–34 days. Birth was usually followed by an oestrus and mating, and a subsequent lactation-controlled embryonic diapause. The mean interval between loss of a pouch young and birth was 31.5 days. Pouch life was 203–215 days and young at foot were weaned 105–139 days after permanent emergence from the pouch. Linear mixed-effects models were used to describe polynomial growth equations for age determination of pouch young using both head and pes length. The relationship between error in age prediction and each body measurement was defined. Head measurements provided the most accurate estimates of the age of pouch young.

Reproduction of the purple-necked rock-wallaby, Petrogale purpureicollis Le Souef (Marsupialia : Macropodidae) in captivity, with age estimation and development of the pouch young

2002 ◽  
Vol 29 (5) ◽  
pp. 463 ◽  
Author(s):  
Peter M. Johnson ◽  
Steven Delean
Keyword(s):  
Polynomial Growth ◽  
Age Determination ◽  
Mixed Effects Models ◽  
Embryonic Diapause ◽  
Linear Mixed Effects ◽  
In Captivity ◽  
Growth Equations ◽  
The Relationship ◽  
Age Prediction

Reproduction of the purple-necked rock-wallaby, Petrogale purpureicollis, was studied in captivity. The length of the oestrous cycle was 36–38 days followed by a gestation period of 33–35 days. Birth was usually followed by an oestrus and mating, and a subsequent lactation-controlled embryonic diapause. The interval between loss of pouch young and birth was 30–36 days. Pouch life was 178–197 days and weaning occurred 92–171 days after permanent emergence from the pouch. The youngest age at which sexual maturity was reached was 21.8 months for males and 18 months for females. Linear mixed-effects models were used to describe polynomial growth equations for age determination of pouch young using both head and pes length. The relationship between error in age prediction and each body measurement was also defined. Head measurements provided the most accurate estimates of the age of pouch young.

Corrigendum to: Reproduction in the northern bettong, Bettongia tropica Wakefield (Marsupialia : Potoroidae), in captivity, with age estimation and development of the pouch young

2001 ◽  
Vol 28 (6) ◽  
pp. 647 ◽  
Author(s):  
Peter M. Johnson ◽  
Steven Delean
Keyword(s):  
Polynomial Growth ◽  
Mating Behaviour ◽  
Age Determination ◽  
Embryonic Diapause ◽  
Linear Mixed Effects ◽  
In Captivity ◽  
Growth Equations ◽  
The Relationship ◽  
Age Prediction

Reproduction in the northern bettong, Bettongia tropica, was studied in captivity. B. tropica is capable of breeding throughout the year, and mating behaviour is similar to that reported for other Bettongia species. The length of the oestrous cycle was 21–23 days, and the period of gestation was 20–23 days. Birth was usually followed by an oestrus and mating, and a subsequent lactation-controlled embryonic diapause. The interval between loss of pouch young and birth was 19–20 days. Permanent emergence from the pouch occurred at 102–112 days, and young at foot were weaned at 166–185 days of age. Linear mixed-effects models were used to describe polynomial growth equations for age determination of pouch young using both head and pes length. The relationship between error in age prediction and each body measurement was also defined. Pes measurements provided the most accurate estimates of the age of pouch young.

Reproduction in the northern bettong, Bettongia tropica Wakefield (Marsupialia: Potoroidae), in captivity, with age estimation and development of pouch young

2001 ◽  
Vol 28 (1) ◽  
pp. 79 ◽  
Author(s):  
Peter M. Johnson ◽  
Steven Delean
Keyword(s):  
Polynomial Growth ◽  
Mating Behaviour ◽  
Age Determination ◽  
Embryonic Diapause ◽  
Linear Mixed Effects ◽  
In Captivity ◽  
Growth Equations ◽  
The Relationship ◽  
Age Prediction

Reproduction in the northern bettong, Bettongia tropica, was studied in captivity. B. tropica is capable of breeding throughout the year, and mating behaviour is similar to that reported for other Bettongia species. The length of the oestrous cycle was 21–23 days, and the period of gestation was 20–23 days. Birth was usually followed by an oestrus and mating, and a subsequent lactation-controlled embryonic diapause. The interval between loss of pouch young and birth was 19–20 days. Permanent emergence from the pouch occurred at 102–112 days, and young at foot were weaned at 166–185 days of age. Linear mixed-effects models were used to describe polynomial growth equations for age determination of pouch young using both head and pes length. The relationship between error in age prediction and each body measurement was also defined. Pes measurements provided the most accurate estimates of the age of pouch young.

Development and age estimation of the pouch young of the black-striped wallaby Macropus dorsalis, with notes on reproduction.

2002 ◽  
Vol 24 (2) ◽  
pp. 193
Author(s):  
PM Johnson ◽  
S Delean
Keyword(s):  
Polynomial Growth ◽  
Age Determination ◽  
Mixed Effects Models ◽  
Embryonic Diapause ◽  
Linear Mixed Effects Models ◽  
Linear Mixed Effects ◽  
Growth Equations ◽  
The Relationship ◽  
Age Prediction

Macropus dorsalis was capable of breeding throughout the year. The period of gestation was 33 - 36 days. Birth was usually followed by an oestrus and mating, and a subsequent lactation-controlled embryonic diapause. The period between loss of pouch-young and birth was 29 - 30 days. Pouch life was 192 - 225 days and weaning occurred 81 - 159 days after permanent pouch emergence. Sexual maturity, defined as age at first fertility, occurred at 11.3 months in females and 15.7 months in males. Linear mixed-effects models were used to describe polynomial growth equations for age determination of pouch young using both head and pes length. The relationship between error in age prediction and each body measurement was also defined. Head measurements provided the most accurate estimates of the age of pouch young.

Reproduction of Lumholtz's tree-kangaroo, Dendrolagus lumholtzi (Marsupialia : Macropodidae) in captivity, with age estimation and development of the pouch young

2003 ◽  
Vol 30 (5) ◽  
pp. 505 ◽  
Author(s):  
Peter M. Johnson ◽  
Steven Delean
Keyword(s):  
Polynomial Growth ◽  
Post Partum ◽  
Age Determination ◽  
Linear Mixed Effects ◽  
In Captivity ◽  
Growth Equations ◽  
The Relationship ◽  
Dendrolagus Lumholtzi ◽  
Age Prediction

Reproduction in Lumholtz's tree kangaroo, Dendrolagus lumholtzi, was studied in captivity. The length of the oestrous cycle was 47–64 days and the gestation period was 42–48 days. Post partum oestrus and embryonic diapause were not observed in this study. The interval between loss of a pouch young and a return mating was 22 days. Pouch life was 246–275 days long and weaning occurred 87–240 days later. Sexual maturity was obtained in females as early as 2.04 years and in males at 4.6 years. Linear mixed-effects models are used to describe polynomial growth equations for age determination of pouch young using both head and pes length. The relationship between error in age prediction and each body measurement is also defined. Head and pes measurements provide equally accurate estimates of the age of pouch young.

Reproduction in the red-legged pademelon, Thylogale stigmatica Gould (Marsupialia : Macropodidae), and age estimation and development of pouch young

1994 ◽  
Vol 21 (5) ◽  
pp. 553 ◽  
Author(s):  
PM Johnson ◽  
K Vernes
Keyword(s):  
Age Estimation ◽  
Post Partum ◽  
General Pattern ◽  
Age Determination ◽  
Gestation Period ◽  
Growth Equation ◽  
In Captivity ◽  
In The Wild ◽  
The Mean

The reproduction of Thylogale stigmatica in captivity was studied and a predictive growth equation for age determination of the pouch young was developed. The general pattern of reproduction involved an oestrous cycle of 29-32 days, a gestation period of 28-30 days and a mean pouch life of 184 days. A post-partum oestrus and mating generally followed birth. Births were observed in all months in captivity, and from October to June in the wild. Mean age of weaning of young was 66 days following permanent pouch emergence, and the mean ages at maturity for females and males was 341 and 466 days, respectively.

scholarly journals Relationship between Body Mass Index and Tooth Decay in a Population of 3–6-Year-Old Children in Iran

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Leila Shafie Bafti ◽  
Maryam Alsadat Hashemipour ◽  
Hamidreza Poureslami ◽  
Zeinab Hoseinian
Keyword(s):  
Body Weight ◽  
Analytical Study ◽  
Deciduous Teeth ◽  
Tooth Decay ◽  
Cross Sectional ◽  
Dmft Index ◽  
The Mean ◽  
Iranian Children ◽  
The Relationship

The aim of the present study was to evaluate the relationship between BMI and tooth decay in a population of Iranian children. In this cross-sectional descriptive/analytical study, 1482 children were selected from kindergartens and preschool centers in Kerman, Iran. The children underwent examination of deciduous teeth (using the dmft index) after determination of height and weight for calculation of BMI. The relationship between BMI (after adjustment for age) and dmft was determined using Poisson’s regression model. The mean of dmft in children with normal BMI was 1.5-fold that in subjects with extra body weight. Age had a significant effect on dmft. In addition, dmft was higher in boys compared to girls. The results of the present study showed that caries rate in the deciduous teeth of 3–6-year-old children decreases with an increase in body weight.

THE RELATIONSHIP OF PLACENTAL THICKNESS WITHGESTATIONALAGE IN THIRD TRIMESTER AND PROBABLE FETAL OUTCOME

2021 ◽  
pp. 64-66
Author(s):  
Sambhunath Bandyopadhyay ◽  
Ritayan Sasmal ◽  
Debarshi Jana
Keyword(s):  
Birth Weight ◽  
Gestational Age ◽  
Age Determination ◽  
Fetal Outcome ◽  
Inclusion Criteria ◽  
Third Trimester ◽  
Relationship Of ◽  
The Relationship ◽  
Placental Thickness

Accurate gestational age determination is very important for management of continuation and termination planning of the pregnancy. rd To establish placental thickness as a parameter for determination of gestational age and fetal growth pattern at 3 trimester. 100 primigravida women who are fullling the inclusion criteria and attend gynae &obs OPD or admitted in their third trimester at IPGME&R from January 2017 to june 2018. Placental thickness at 3rd trimester USG scan is moderately correlated with gestational age, if placental thickness expressed in millimeter then it correlated with gestational age at weeks. rd st Placental thickness with >3.2 cm (32 mm) at 3 trimester almost associated with good fetal outcome, with APGAR score >8 at 1 min and birth weight >2500 gm.

Buoyancy of Atlantic and Pacific Herring

1969 ◽  
Vol 26 (8) ◽  
pp. 2077-2091 ◽  
Author(s):  
Vivien M. Brawn
Keyword(s):  
Vertical Movement ◽  
Body Volume ◽  
Pacific Herring ◽  
Natural Conditions ◽  
The Pacific ◽  
In Captivity ◽  
The Mean ◽  
Total Body ◽  
Total Body Volume ◽  
The Relationship

Pacific and Atlantic herring after adjustment to water 36 cm deep had sinking-factors between 1000 and 1008 and showed an inverse relationship between oil content and swimbladder volume up to 12% oil. At higher oil contents a swimbladder volume between 2.6 and 3.0% of total body volume was maintained. The mean volumes and densities of various components of the Pacific herring held in captivity were: swimbladder gas 4.1% of total volume,.0013 g/ml; oil 3.5%,.926 g/ml; scales 0.5%, 1.966 g/ml; skeleton 1.2%, 1.993 g/ml; rest of fish 90.6%, 1.057 g/ml. These components on the average exerted upward forces of 41.4 and 3.3 dynes/ml of fish due to gas and oil, and downward forces of 4.6, 11.2, and 32.1 dynes/ml due to scales, skeleton, and the rest of the fish respectively. Under natural conditions herring usually have high oil contents so the relationship observed here suggests they have low swimbladder volumes. This combined with a duct direct from the swimbladder to the exterior and the lack of gas secretion would give the herring freedom of vertical movement and a low change of sinking factor with depth.

scholarly journals DETERMINATION OF THE COMBINED WIDTH OF MAXILLARY ANTERIOR TEETH USING INNERCANTHAL DISTANCE WITH RESPECT TO AGE GENDER AND ETHINICITY

2021 ◽  
Vol 71 (Suppl-1) ◽  
pp. S164-69
Author(s):  
Naseer Ahmed ◽  
Maria Shakoor Abbasi ◽  
Danish Azeem Khan ◽  
Shiza Khalid ◽  
Warda Jawed ◽  
...  
Keyword(s):  
Cross Sectional Study ◽  
Gender Disparities ◽  
Sectional Study ◽  
Weak Correlation ◽  
Cross Sectional ◽  
Anterior Teeth ◽  
Significant Difference ◽  
The Mean ◽  
The Relationship

Objective: To evaluate the relationship between inner canthal distance and maxillary anterior teeth width withrespect to age, gender and ethnicity. Study Design: Cross sectional study. Place and Duration of Study: Altamash Institute of Dental Medicine, Karachi, from Aug 2019 to Jan 2020. Methodology: One hundred participants from both genders with full permanent dentition, no interdental space or pathology and facial symmetry were included in this study. The measurements were carried out with digital Vernier caliper. SPSS-25 was used for statistical analysis. Results: The mean ± SD of inner canthal distance and width of maxillary anterior teeth were 2.99cm ± 0.46and 3.82cm ± 0.35 respectively. A significant difference was found between gender (p=0.037) and inner canthaldistance. The maxillary anterior teeth width and inner canthal distance varies amongst different ethnicities(p=0.01). The inner canthal distance does not vary with advancing age (p=0.87) whereas width of maxillaryanterior teeth varies (p=0.04). A weak correlation value of 0.47 was found between inner canthal distance andmaxillary anterior teeth width. Conclusion: This research suggests that there is a weak relationship between inner canthal distance and maxillary anterior teeth width. Therefore, a multiplication ratio of 1.27 is advised to get combined mesiodistal width of maxillary anterior teeth. Additionally, the value of both differs in various local ethnicities. Inner canthal distance does not vary with age though has significant gender disparities while maxillary anterior teeth width remains constant.

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