Population-Structure and Reproductive Status of Koalas on Raymond Island, Victoria

1988 ◽  
Vol 15 (5) ◽  
pp. 511 ◽  
Author(s):  
PJ Mitchell ◽  
R Bilney ◽  
RW Martin
Keyword(s):  
Population Structure ◽  
Reproductive Tract ◽  
Older Age ◽  
Reproductive Status ◽  
Age Classes ◽  
Tract Disease

In December 1980, 87 adult (>1-year-old) koalas (36 males, 51 females) were captured and marked on Raymond Island, in the Gippsland Lakes of Victoria. A further 85 adults and 34 juveniles (6-12 months old) were sighted but not captured. In August 1985, 25 females and 24 males were captured and examined. The proportions of animals in the older age classes (age classes 4 and above) were 61% in 1980 and 39% in 1985, while the reproduction rates were 38 and 40%, respectively. The low reproduction rates, and the high proportions of older animals in 1980, were attributed to reproductive tract disease, although the presence of this disease did not prevent the population from increasing to a density at which trees were being overbrowsed.

Age-Specific Fertility in Three Populations of the Koala, Phascolarctos cinereus Goldfuss, in Victoria

1981 ◽  
Vol 8 (2) ◽  
pp. 275 ◽  
Author(s):  
RW Martin
Keyword(s):  
Reproductive Tract ◽  
Reproductive Failure ◽  
Low Fertility ◽  
Age Classes ◽  
Phascolarctos Cinereus ◽  
Island Populations ◽  
Tract Disease ◽  
Poor Nutrition

Mean fertility in three koala populations in Victoria in 1979 varied from 63% on French I, to 13% at Walkerville and 22% on Phillip I. Similar differences between the two island populations have existed for at least 30 y. A method of assigning animals to age classes on the basis of the wear patterns on the premolar was devised and reproduction in 1979 examined on an age-specific basis. The low fertility was associated with a reproductive failure among females older than 3 y. On Phillip I. this is thought to be due to a widespread reproductive tract disease in females, possibly caused by ingestion of phytooestrogens from eucalypt foliage. At Walkerville a combination of reproductive tract disease, poor nutrition and heavy tick burdens is thought to be the cause.

Overbrowsing, and decline of a population of the koala, Phascolarctos cinereus, in Victoria. II. Population condition

1985 ◽  
Vol 12 (3) ◽  
pp. 367 ◽  
Author(s):  
R. W. Martin
Keyword(s):  
Growth Rates ◽  
Reproductive Tract ◽  
The Body ◽  
Low Fertility ◽  
Age Classes ◽  
Lower Growth ◽  
Phascolarctos Cinereus ◽  
Significant Difference ◽  
Body Weights ◽  
Tract Disease

Juvenile and sub-adult koalas from a population at Walkerville, Victoria, which was severely defoliating its preferred food trees, had significantly lower growth rates than animals from a population on French Island, Victoria. Mature males from Walkerville were significantly smaller than French Island males in most age classes. There was no significant difference between the body weights of mature females of the 2 populations. Haematological tests on the females showed that nutritionally induced anaemia was significant in the Walkerville animals by Jan. 1981. Heavy tick loads probably exacerbated the effects of the food shortage on the animals' condition, but were not the cause of the anaemia. The low fertility rate of the Walkerville females appeared to be due to their poor nutritional state and to reproductive tract disease.

scholarly journals Zika: an ongoing threat to women and infants

2018 ◽  
Vol 34 (11) ◽  
Author(s):  
Beatriz Macedo Coimbra dos Santos ◽  
Flavio Codeço Coelho ◽  
Margaret Armstrong ◽  
Valeria Saraceni ◽  
Cristina Lemos
Keyword(s):  
Sexual Transmission ◽  
Risk Groups ◽  
Gender Disparity ◽  
Incidence Rates ◽  
Older Age ◽  
Age Classes ◽  
Sharp Drop ◽  
Men And Women ◽  
Women And Children ◽  
Previous Summer

Recent data from the municipality of Rio de Janeiro, Brazil, shows a sharp drop in the number of reported occurrences of Zika during the summer of 2016/2017, compared to the previous summer. There is still a much higher incidence among women than men, almost certainly due to sexual transmission. An unexpected feature of the new data is that there are proportionally far more cases affecting children under 15 months than older age classes. By comparing incidence rates in 2016/2017 and 2015/2016, we were able to deduce the proportion of reported cases affecting men and women, and verify that gender disparity is still present. Women and children are still risk groups for Zika infection, even during non-epidemic seasons.

scholarly journals Cow-level risk factors for reproductive tract disease diagnosed by 2 methods in pasture-grazed dairy cattle in Ireland

2020 ◽  
Vol 103 (1) ◽  
pp. 737-749 ◽  
Author(s):  
E. Kelly ◽  
C.G. McAloon ◽  
L. O'Grady ◽  
M. Duane ◽  
J.R. Somers ◽  
...  
Keyword(s):  
Risk Factors ◽  
Dairy Cattle ◽  
Reproductive Tract ◽  
Tract Disease

scholarly journals Mycoplasma genitaliumInfection and Female Reproductive Tract Disease: A Meta-analysis

2015 ◽  
Vol 61 (3) ◽  
pp. 418-426 ◽  
Author(s):  
Rebecca Lis ◽  
Ali Rowhani-Rahbar ◽  
Lisa E. Manhart
Keyword(s):  
Reproductive Tract ◽  
Meta Analysis ◽  
Female Reproductive Tract ◽  
Tract Disease

Reproductive tract disease associated with inoculation of pregnant white-tailed deer with bovine viral diarrhea virus

2008 ◽  
Vol 69 (12) ◽  
pp. 1630-1636 ◽  
Author(s):  
Julia F. Ridpath ◽  
Elizabeth A. Driskell ◽  
Christopher C. L. Chase ◽  
John D. Neill ◽  
Mitchell V. Palmer ◽  
...  
Keyword(s):  
Bovine Viral Diarrhea Virus ◽  
Reproductive Tract ◽  
Bovine Viral Diarrhea ◽  
Diarrhea Virus ◽  
Viral Diarrhea ◽  
Tract Disease ◽  
Viral Diarrhea Virus

scholarly journals Estructura poblacional y características morfológicas de Abarema glauca (Fabaceae) en el sur de Artemisa, Cuba

2020 ◽  
Vol 14 (1) ◽  
pp. 121-139
Author(s):  
Diana Rodríguez-Cala ◽  
Daniel Tejeda Gómez ◽  
Raúl Jorge Marrero ◽  
Gabriela Ramos-González ◽  
Aylen Mederos Perugorría ◽  
...  
Keyword(s):  
Population Structure ◽  
20Th Century ◽  
Tree Species ◽  
Natural Regeneration ◽  
Population Studies ◽  
Older Age ◽  
The Status

Abarema glaucum is a tree species native to Cuba, Hispaniola and Bahamas. It is considered Vulnerable to extinction in Cuba. The evaluation in Cuba also warns of the need to carry out population studies of the species. This work made the assessment of the status of Abarema glaucum in Artemisa, where the species had been reported before the half of 20th century. For this, the population structure was characterized; amount of accumulated aerial biomass in the region was estimated; and the threats to its conservation in the region were identified. Abarema glaucum has less than 250 individuals, with less than 50 mature individuals, dispersed between three sites in Güira de Melena y Alquízar. The diameter and height vary between 0.03 and 36.31 cm, and 0.05 and 15 m, respectively. The accumulated aerial biomass is estimated between 3 and 4 metric tons among 33 adults. The individuals are aggregated with good natural regeneration, but low recruitment towards older age phases. It is a species dispersed in patches of remaining forest in the region, where the risk of fire, logging, trampling, as well as the degradation of its habitat, constitute threats to its conservation. Logging could delay and even prevent flowering in the adults. The logging and the continuous decline of the quality of the habitat are putting the sustainability of the species in the area in danger.

scholarly journals Zika: An ongoing threat to women and infants

2017 ◽  
Author(s):  
Beatriz Macedo Coimbra ◽  
Flávio Codeço Coelho ◽  
Margaret Armstrong ◽  
Valeria Saraceni ◽  
Cristina Lemos
Keyword(s):  
Sexual Transmission ◽  
Herd Immunity ◽  
Risk Groups ◽  
Older Age ◽  
Age Classes ◽  
Sharp Drop ◽  
Men And Women ◽  
Epidemic Season ◽  
Women And Children ◽  
Previous Summer

AbstractRecent data from Rio de Janeiro shows a sharp drop in the number of notified cases of Zika in the summer of 2016-17, compared to the previous summer. This is probably due to herd immunity built up after the previous year's epidemic. There is still a much higher incidence among women than men, almost certainly due to sexual transmission. An unexpected feature of the new data is that there are proportionally far more cases in children under 15 months than in older age classes. By comparing the incidence for 2016-17 with that of 2015-16, we can deduce the proportion of reported cases for men and women, and also verify that the disparity of incidence between them is still present. Women and children still represent risk groups with regard to Zika infection, even during a non-epidemic season.

scholarly journals Population structure and reproductive status of the invasive Eriocheir sinensis (Decapoda, Varunidae) in the Tagus estuary (Portugal)

Limnetica ◽  
2018 ◽  
pp. 47-59
Author(s):  
Anastácio, Pedro M. ◽  
Marques, Mónica ◽  
Águas, Maria ◽  
Wójcik-Fudalewska, Dagmara ◽  
Normant-Saremba, Monika
Keyword(s):  
Population Structure ◽  
Eriocheir Sinensis ◽  
Reproductive Status ◽  
Tagus Estuary
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