Life-History of the Eastern Pygmy-Possum, Cercartetus-Nanus (Burramyidae, Marsupialia), in South-Eastern Australia

1990 ◽  
Vol 38 (3) ◽  
pp. 287 ◽  
Author(s):  
SJ Ward
Keyword(s):  
Life History ◽  
National Park ◽  
Maximum Longevity ◽  
South Eastern ◽  
North East ◽  
Eucalypt Forest ◽  
Eastern Australia ◽  
History Of ◽  
Cercartetus Nanus ◽  
Modal Size

Populations of Cercartetus nanus were investigated in three areas of Victoria: two areas of Banksia woodland at Wilsons Promontory National Park and an area of mixed eucalypt forest with an under- storey of B. spinulosa at Nar Nar Goon North, east of Melbourne. Most births occurred between November and March, but in areas where the dominant Banksia sp. flowered in winter they took place year-round. Most females produced two litters in a year, but some produced three. Males were reproductively active throughout the year. Litter sizes ranged from two to six, with a modal size of four. Pouch life lasted 30 days and weaning occurred at 65 days. Growth was rapid, young became independent immediately after weaning, and matured as early as 4.5-5.0 months old. Maximum longevity in the field was at least 4 years.

Life-History of the Feathertail Glider, Acrobates-Pygmaeus (Acrobatidae, Marsupialia) in South-Eastern Australia

1990 ◽  
Vol 38 (5) ◽  
pp. 503 ◽  
Author(s):  
SJ Ward
Keyword(s):  
Life History ◽  
Litter Size ◽  
Maternal Investment ◽  
Seasonal Fluctuation ◽  
North West ◽  
South Eastern ◽  
North East ◽  
Eastern Australia ◽  
History Of ◽  
Maximum Field

Acrobates pygmaeus was captured in nestboxes in three areas of central and southern Victoria: the Gembrook-Cockatoo area and Nar Nar Goon North east of Melbourne, and Daylesford north-west of Melbourne. Breeding was strictly seasonal and females produced two litters between July and February each year. Males also showed seasonal fluctuation in testes sizes. Mean litter size was 3.5 at birth and 2.5 at weaning. Pouch life lasted 65 days and young were weaned at approximately 100 days of age. Growth was slow and maternal investment in each young was high, and continued after weaning. Most individuals matured in the season following their birth, but some males did not mature until the second season after their birth. Maximum field longevity was at least three years. Comparisons are made with other small diprotodont marsupials.

Distribution and life history of caridean shrimps in regulated lowland rivers in southern Australia

2004 ◽  
Vol 55 (3) ◽  
pp. 295 ◽  
Author(s):  
A. J. Richardson ◽  
J. E. Growns ◽  
R. A. Cook
Keyword(s):  
Life History ◽  
Life Stages ◽  
Lowland Rivers ◽  
Flow Alteration ◽  
Eastern Australia ◽  
History Of ◽  
Paratya Australiensis ◽  
Juvenile Stages ◽  
Shrimp Abundance ◽  
Large Adult

Caridean shrimps are an integral component of lowland river ecosystems in south-eastern Australia, but their distributions may be affected by flow alteration. Monthly shrimp samples were collected from slackwaters in three hydrologically distinct sections of the heavily regulated Campaspe River and the less regulated Broken River for three consecutive years. The distributions of Paratya australiensis, Caridina mccullochi and Macrobrachium australiense, along with their life history in river sections with different hydrology are outlined. Paratya australiensis and M. australiense occurred in all sections, but C. mccullochi was absent from sections of the Campaspe River that received irrigation flows during summer/autumn. Shrimp larvae were most abundant in summer (December–February) and juvenile recruitment continued through to mid autumn (April). Breeding and recruitment of P. australiensis occurred for longer than other shrimps. Apart from large adult and berried M. australiense, all life stages of shrimps commonly occurred in slackwaters, particularly the larval and juvenile stages. Irrigation flows in summer/autumn probably adversely affect the size, extent and arrangement of slackwaters, at a time when they may be critical habitats for C. mccullochi larval development and recruitment. Dams and weirs in the Campaspe River may have influenced shrimp abundance and the timing of breeding.

The Rabbit in Subalpine South-eastern Australia. I. Population Structure and Productivity

1974 ◽  
Vol 1 (1) ◽  
pp. 1 ◽  
Author(s):  
DJ Dunsmore
Keyword(s):  
Population Structure ◽  
National Park ◽  
Initial Level ◽  
Adult Survival ◽  
South Eastern ◽  
Breeding Group ◽  
Eastern Australia ◽  
Domestic Livestock ◽  
A Site ◽  
Better Than

An unconfined, almost completely tagged rabbit population on a site of about 100 ha was studied by observation and trapping for 5 years. The commencement of the study coincided approximately with the incorporation of the area into the Kosciusko National Park, the elimination of grazing by domestic livestock, and the cessation of the previously almost annual burning of the area. During the 5-yr study the fecundity of the rabbits declined to little more than half the initial level. This was not a result of the concurrently increasing age of the population, which was shown to be quite unrelated. It was also shown that the 1yr old rabbits were less fecund than the older rabbits, whose fecundity remained constant. Although it appeared subjectively to be so, the area was not uniformly suitable for the survival of rabbits. In one of its four subdivisions adult survival was much better than in the others; and in one of the others it was much the worst. During the study there was considerable immigration to the area, presumably balanced by migration. Females tended to remain where they were born and in no case changed from one breeding group to another. Males were considerably less sedentary than the females.

Notes on the Biology of some predacious Mites on Fruit Trees in south-eastern England

1956 ◽  
Vol 47 (2) ◽  
pp. 205-214 ◽  
Author(s):  
Elsie Collyer
Keyword(s):  
Life History ◽  
Plant Tissue ◽  
Fruit Trees ◽  
Predacious Mites ◽  
Apple Trees ◽  
South Eastern ◽  
Three Generations ◽  
Phytophagous Mites ◽  
History Of ◽  
Considerable Length

A number of predacious mites of the PHYTOSEIINAE (family LAELAPTIDAE), found in south-eastern England, mostly in association with fruit trees, are listed. Certain measurements and other characters that are of value in separating species are given. The species found were: Typhlodromus tiliae Oudm., T. cucumeris Oudm., T. tiliarum Oudm., T. rhenanus (Oudm.), T. finlandicus (Oudm.), T. umbraticus Chant, T. massei Nesbitt, T. vitis Oudm., T. soleiger (Ribaga), Phytoseius macropilis (Banks) and two Amblyseius spp. Of these, T. tiliae, T. finlandicus and P. macropilis are normally abundant on apple trees, but only T. tiliae remains abundant on commercially-grown apple trees. For each species a list of plants on which it has been found is given.Details of the life-history of laboratory-reared mites are given and these, together with counts of field populations, show that three generations a year is normal.Predacious phytoseiine mites feed on several species of TETRANYCHIDAE, including Metatetranychus ulmi (Koch) and Tetranychus telarius (L.); when M. ulmi is supplied in adequate numbers, adults of T. tiliae consume 3 mites per day, the nymphs 2 mites per day, on an average. It is thought that they also feed on plant tissue, since individuals survived in the laboratory for a considerable length of time in the absence of phytophagous mites, though eggs were not laid.

Fishes of the family Prototroctidae (Salmoniformes)

1976 ◽  
Vol 27 (4) ◽  
pp. 641 ◽  
Author(s):  
RM McDowall
Keyword(s):  
New Zealand ◽  
Natural History ◽  
Gill Rakers ◽  
South Eastern ◽  
Eastern Australia ◽  
The Family ◽  
History Of ◽  
Lateral Scale ◽  
South Eastern Australia

The family Prototroctidae, the genus Prototroctes, and the two contained species-P. oxyrhynchus Gunther, 1870 (New Zealand) and P. maraena Gunther 1864 (south-eastern Australia and Tasmania) are described. P. oxyvhynchus is distinguished from P. maraena by much higher counts of lateral scale rows, vertebrae and gill rakers. What is known of the natural history of Prototroctes is reviewed. P. oxyvhynchus is extinct and P. maraena now rare; reasons for the decline of these species are discussed.

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