The Breeding Biology of a Tropical Possum, Trichosurus-Vulpecula-Arnhemensis (Phalangeridae, Marsupialia)

1992 ◽  
Vol 40 (6) ◽  
pp. 653 ◽  
Author(s):  
JA Kerle ◽  
CJ Howe
Keyword(s):  
Reproductive Strategy ◽  
Growth And Development ◽  
Captive Breeding ◽  
Breeding Biology ◽  
Breeding Cycle ◽  
Brushtail Possum ◽  
Trichosurus Vulpecula ◽  
Males And Females ◽  
Reproductive Cycles ◽  
Stable Habitat

The breeding biology of Trichosurus vulpecula has been studied in some detail for temperate populations but not for the northern brushtail possum (T. v. arnhemensis), the tropical form of this species. Data for the distribution of births and sex ratio of the young, growth and development of the young and reproductive cycles of both males and females were obtained. Most data were collected from a captive breeding colony of northern brushtails and supplemented with data from wild populations. The reproduction, growth and development of T. v. arnhemensis are very similar to those already described for other populations of T vulpecula. The observed differences can be explained by variation in the size of the animals and the absence of a restricted breeding season. Neither males nor females showed any periodicity in their reproductive strategy. This continuous breeding cycle can be attributed directly to their tropical environment. These tropical possums occupy a stable habitat, mature early and have a higher reproductive effort than populations in more seasonal and unpredictable environments. This suggests that the northern brushtail has a stochastic or 'bet-hedging' reproductive strategy.

Composition of Milk of the Common Brushtail Possum, Trichosurus Vulpecula (Marsupialia: Phalangeridae): Concentrations of Elements

1996 ◽  
Vol 44 (5) ◽  
pp. 479 ◽  
Author(s):  
SE Jolly ◽  
GA Morriss ◽  
S Scobie ◽  
PE Cowan
Keyword(s):  
Growth And Development ◽  
Developmental Changes ◽  
Brushtail Possum ◽  
Trichosurus Vulpecula ◽  
Milk Samples ◽  
Eye Opening ◽  
The Common ◽  
Common Brushtail Possum ◽  
Zinc Levels ◽  
Almost All

The concentrations of 11 elements (calcium, copper, iron, magnesium, manganese, phosphorus, potassium, sodium, strontium, sulphur and zinc) were measured in milk samples collected from 193 lactating brushtail possums, Trichosurus vulpecula, at all stages of lactation. Most elements showed patterns of change during lactation similar to those of other marsupials. The most marked changes occurred at about 80-120 days, when the growth rate of the pouch young increased and developmental changes took place, such as eye opening and fur growth. Compared with eutherians, copper and iron concentrations were high in possum milk, as in other marsupials, but zinc levels were exceptionally high. Strontium and manganese levels, not measured before in marsupial milk, were considerably higher than levels reported in eutherian milk. In contrast to eutherian mammals, marsupial young must be supplied with large quantities of minerals in the milk as almost all growth and development occurs after birth, and possum young are entirely dependent on milk supplied by the mother for about the first 100 days.

OBSERVATIONS OF SIX REPRODUCTIVE CYCLES AND FOOD HABITS OF BROWN FISH OWL NESTING AT THE HUMAN HABITAT IN BANGLADESH

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
M. A. Samad
Keyword(s):  
Incubation Period ◽  
Food Habits ◽  
Captive Breeding ◽  
Economic Benefits ◽  
Food Sources ◽  
Breeding Cycle ◽  
Recreation Ecology ◽  
Human Habitat ◽  
Breeding Cycles ◽  
Reproductive Cycles

Background: Research reports on wild nocturnal bird especially Brown fish owl are very limited not only in Bangladesh but also elsewhere. Objectives: This paper describes the diet profile and physiology of reproduction of a pair of wild Brown fish owl. Materials and Methods: A breeding pair of Brown fish owl has been used the abandoned flower planting site on the window sunshade for their reproduction during six breeding cycles from 2013 to 2019. The behavior, food sources, food habits and their physiology of reproduction were observed closely and keenly for six reproductive cycles. Results: The male owl is usually brought prey by hunting at night and supplied to the female owl and their owlet at the nest but the only unconsumed prey lying on the nest were identified visually during the daytime. The most commonly recorded prey consumed by the habitat lost Brown fish owl include fish, frogs, rats, snake, birds and lizards. Investigation of all the six breeding cycles of this species of owl showed that all the six reproductive cycles were completed during the high cold winter months from end of November to early March. The egg clutch size varied from 1-2 with an average of 1.33 and the female owl alone incubated eggs and the incubation period varied from 37 to 38 days with an average of 37.5 days. The brooding and care of owlets were mainly performed by the female owl but the male owl supplied the food usually at night time. All the six reproductive cycles of the owls were successfully completed with fledged the juvenile owls between 53-63 days with an average of 59.25 days parental care with a total of breeding cycle from 91 to 101 with an average of 96.75 days. Conclusions: The objectives of the wild and zoo birds are for the conservation, research, education, recreation, ecology and economic benefits. This article would help to encourage development of bird parks, to create awareness of bird life and generate interest in ornithology and to help promote conservation of endangered species of birds by captive breeding. Keywords: Brown fish owl, Food and food habits, Physiology of reproduction, Egg clutch, Incubation period, Seasonal breeding cycle

Observation on the breeding biology of Polypedates teraiensis (Dubois, 1987) (Amphibia: Rhacophoridae)

2017 ◽  
Vol 17 (1) ◽  
pp. 25-32
Author(s):  
Jacinta Lalchhanhimi ◽  
Lalremsanga H.T.
Keyword(s):  
Sexual Dimorphism ◽  
Breeding Season ◽  
Sound Production ◽  
Reproductive Function ◽  
Breeding Biology ◽  
Tree Frog ◽  
University Campus ◽  
Morphometric Measurements ◽  
Advertisement Calls ◽  
Males And Females

The breeding biology of tree frog, Polypedates teraiensis was studied during the breeding season at Mizoram University Campus. It was found that sound production by male during the breeding season was primarily a reproductive function and advertisement calls attract females to the breeding areas and announce other males that a given territory is occupied. The aim of this study was to provide the detailed information on the breeding behaviour and the advertisement calls of Polypedates teraiensis. The morphometric measurements of the amplecting pairs (males and females) for sexual dimorphism along with clutch sizes were also studied.

scholarly journals Preovulatory follicle development and ovulation in the brushtail possum (Trichosurus vulpecula) monitored by repeated laparoscopy

Reproduction ◽  
1997 ◽  
Vol 110 (2) ◽  
pp. 361-370 ◽  
Author(s):  
J. L. Crawford ◽  
G. H. Shackell ◽  
E. G. Thompson ◽  
B. J. McLeod ◽  
P. R. Hurst
Keyword(s):  
Brushtail Possum ◽  
Follicle Development ◽  
Trichosurus Vulpecula ◽  
Preovulatory Follicle

Expression of the FcRn receptor (α and β) gene homologues in the intestine of suckling brushtail possum (Trichosurus vulpecula) pouch young

2003 ◽  
Vol 39 (12) ◽  
pp. 707-717 ◽  
Author(s):  
A.H Western ◽  
D.C Eckery ◽  
J Demmer ◽  
J.L Juengel ◽  
K.P McNatty ◽  
...  
Keyword(s):  
Brushtail Possum ◽  
Trichosurus Vulpecula

Growth and Development of Nestling Brown Goshawks Accipiter Fasciatus, with Details of Breeding Biology

1982 ◽  
Vol 82 (4) ◽  
pp. 189-194 ◽  
Author(s):  
Penny D. Olsen ◽  
Jerry Olsen ◽  
Nick J. Mooney
Keyword(s):  
Growth And Development ◽  
Breeding Biology

scholarly journals Vesicle-associated protein 1: a novel ovarian immunocontraceptive target in the common brushtail possum, Trichosurus vulpecula

Reproduction ◽  
2008 ◽  
Vol 136 (5) ◽  
pp. 657-665 ◽  
Author(s):  
A Nation ◽  
S Cui ◽  
L Selwood
Keyword(s):  
Immune Response ◽  
Reproductive Tract ◽  
Major Change ◽  
Brushtail Possum ◽  
Transmission Electron ◽  
Exciting Potential ◽  
The Common ◽  
Immunological Research ◽  
Reproductive Cycles ◽  
Estrous Cycling

Ovarian-based immunological research is currently restricted to proteins of the zona pellucida. This study examined the immunocontraceptive potential of a novel vesicle-associated protein, VAP1, previously isolated from the vesicle-rich hemisphere of the brushtail possum oocyte. Seven female possums were immunized against recombinant glutathione S-transferase-VAP1 fusion protein. Control animals (n=3) received antigen-free vaccinations. Following immunization, regular blood sampling determined the level and duration of immune response. Animals were monitored daily, pre- and post-immunization, to determine estrous cycling activity and the percentage of reproductive cycles yielding viable young. The reproductive tracts and somatic organs of VAP1-immunized (n=7), control-immunized (n=3) and non-immunized (n=5) animals were collected and examined by histology and transmission electron microscopy. VAP1 immunization caused a strong and sustained immune response. Elevated levels of VAP1 antibody binding were detected in sera following initial injections, and immune titers rose as boosters were administered. Immunization had no adverse effect upon animal behavior or body condition. Immunized females demonstrated no major change in annual estrous cycling activity; however, the percentage of reproductive cycles resulting in pouch young decreased significantly (P<0.05) by 40%. Histological and ultrastructural analyses revealed an abundance of lipid-like degradation bodies within the ooplasm of developing oocytes and the cytoplasm of failing uterine zygotes. Active macrophage invasion of enlarged endometrial glands was observed in the uteri of two females. Reproductive tract changes are discussed in relation to observed fertility decline. The results of this study indicate that VAP1 has exciting potential as an immunocontraceptive target for possum control in New Zealand.

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