Reproductive cycle of two populations of Ophionereis schayeri (Ophiuroidea) in New South Wales

1995 ◽  
Vol 124 (1) ◽  
pp. 85-97 ◽  
Author(s):  
P. Selvakumaraswamy ◽  
M. Byrne
Keyword(s):  
Reproductive Cycle ◽  
New South ◽  
New South Wales ◽  
South Wales ◽  
Two Populations

The annual reproductive cycle of the sea urchin Centrostephanus rodgersii in New South Wales

2020 ◽  
pp. 734-734
Author(s):  
C. K. King ◽  
O. Høegh-Guldberg ◽  
M. Byrne
Keyword(s):  
Sea Urchin ◽  
Reproductive Cycle ◽  
New South ◽  
New South Wales ◽  
Annual Reproductive Cycle ◽  
South Wales

Environmental influences on histological changes in the reproductive cycle of four New South Wales sea urchins

Aquaculture ◽  
1978 ◽  
Vol 15 (1) ◽  
pp. 1-17 ◽  
Author(s):  
C. O'Connor ◽  
G. Riley ◽  
S. Lefebvre ◽  
D. Bloom
Keyword(s):  
Reproductive Cycle ◽  
Sea Urchins ◽  
New South ◽  
New South Wales ◽  
Environmental Influences ◽  
Histological Changes ◽  
South Wales

Photoperiodic adaptation in Xanthium strumarium populations introduced to Australia

1973 ◽  
Vol 51 (1) ◽  
pp. 221-229 ◽  
Author(s):  
Calvin McMillan
Keyword(s):  
Dark Period ◽  
New South ◽  
New South Wales ◽  
Xanthium Strumarium ◽  
South Wales ◽  
Two Populations

Seedlings derived from field-collected burs from Australia were tested for photoperiodic adaptation and morphologies. Four morphophysiological types were represented from northern Victoria to southern Queensland. The widespread chinense morphological complex (Noogoora Burr) has a critical dark period of 10.5 h. The italicum morphological complex of eastern central New South Wales has a critical dark period of 10 h. The cavanillesii morphological complex near Sydney has an apparent critical night of 9.5 h and the pensylvanicum morphological complex in northwestern Victoria has an apparent critical night of 9.25–9.5 h. Two populations in the area of sympatry of the chinense and italicum complexes showed diverse photoperiodic adaptation, ripeness-to-flower (maturity) responses and morphologies, suggesting hybridization. Although Xanthium populations have been in Australia for over 100 years, their morphophysiology matches populations in America with relatively narrow distribution.

Reproduction of the turban shell Turbo torquatus Gmelin 1791 (Mollusca : Gastropoda), in New South Wales, Australia

2002 ◽  
Vol 53 (1) ◽  
pp. 85 ◽  
Author(s):  
D. W. Ward ◽  
A. R. Davis
Keyword(s):  
Reproductive Cycle ◽  
Developmental Stages ◽  
New South ◽  
Gonadosomatic Index ◽  
New South Wales ◽  
Gonad Development ◽  
Gonadal Development ◽  
Small Scale ◽  
Frequency Distributions ◽  
South Wales

The Sydney turban shell Turbo torquatus is the focus of a small-scale commercial fishery in New South Wales. Effective management requires knowledge of the reproductive biology, yet this is lacking for NSW waters. The reproductive cycle was investigated at three localities on the southern New South Wales coast. Samples of T. torquatus were collected monthly at Wollongong, Ulladulla and Eden from February 1996 until August or December 1997. The reproductive cycle was investigated by three methods: monthly determination of a gonadosomatic index, estimation of oocyte size-frequency distributions and classification of female gonads into developmental stages following histological sectioning. Males and females within a population underwent synchronous gonad development and spawning. Spawning events were often protracted over a period of several months with females in various stages of gonadal development. Two spawning events occurred each year, with a spawning event in autumn–winter and another in spring–summer. These events were asynchronous among the three localities, and partial spawning appeared to be a common occurrence. Owing to variation in the timing of spawning between populations separated by a distance as small as 15 km, seasonal closures to protect spawning stocks are unlikely to be effective.

scholarly journals Initial effects of rabbit haemorrhagic disease on free-living rabbit (Oryctolagus cuniculus) populations in central-western New South Wales

1999 ◽  
Vol 26 (1) ◽  
pp. 69 ◽  
Author(s):  
Glen Saunders ◽  
David Choquenot ◽  
John McIlroy ◽  
Rossanne Packwood
Keyword(s):  
New South ◽  
New South Wales ◽  
Free Living ◽  
The Third ◽  
Rates Of Change ◽  
South Wales ◽  
Rabbit Haemorrhagic Disease ◽  
Haemorrhagic Disease ◽  
Variable Influence ◽  
Two Populations

Quarterly spotlight counts of rabbits were conducted at three sites in central-western New South Wales. These counts commenced two years before the arrival of rabbit haemorrhagic disease (RHD) in the winter of 1996. The existing data on quarterly rates of change in rabbit abundance for the three populations provided a unique opportunity to study the effects of RHD on rabbit demography. Prior to the arrival of RHD, all three populations underwent phases of sequential increase and decrease in each year. On the basis of these patterns, RHD had a variable influence on the demography of the three rabbit populations. In 1996–97, the density of two populations declined over an expected period of increase, while at the third site the density increased as expected from pre-RHD patterns. Twelve months after their failure to generate expected positive rates of increase the two affected populations had returned to the normal sequence of increases and decreases in density although still at comparatively low numbers.

Reproductive cycle of the fork-tailed catfish Arius graeffei Kner & Steindachner (Pisces : Ariidae) from the Clarence River, New South Wales

1985 ◽  
Vol 36 (1) ◽  
pp. 23 ◽  
Author(s):  
MA Rimmer
Keyword(s):  
Sex Ratio ◽  
Adult Female ◽  
Reproductive Cycle ◽  
Ovarian Development ◽  
New South ◽  
New South Wales ◽  
Dorsal Surface ◽  
Fish Length ◽  
Adult Males ◽  
South Wales

A. graeffei breeds annually from early November to early December when water temperatures reach 26°C and daylength averages 13.7 h. The bulk of ovarian development is restricted to the 2 months before spawning; the rate of oocyte development varies substantially between individuals. Diameters of mature oocytes range from 11.0 to 13.7 mm (mean 12.2 mm). Fecundity ranges from 40 to 122 and is linearly related to fish length and weight. The sex ratio of the population studied was 0.82 with a preponderance of males. The pelvic fins of adult female A. graeffei are longer and more rounded than those of adult males, and have a hook-like thickening (clasper) on the dorsal surface which develops seasonally in association with the reproductive cycle. Although marine populations of A. Graeffei appear to undertake extensive anadromous migrations associated with breeding, no such movements were observed in the fluviatile population studied.

Radiotherapy utilization in New South Wales from 1996 to 1998: Comment

2000 ◽  
Vol 44 (4) ◽  
pp. 483-484 ◽  
Author(s):  
JH Kearsley
Keyword(s):  
New South ◽  
New South Wales ◽  
South Wales

Plants of New South Wales

2009 ◽  
Author(s):  
F. Von Mueller
Keyword(s):  
New South ◽  
New South Wales ◽  
South Wales

Notes and Sketches of New South Wales

2009 ◽  
Author(s):  
Louisa Anne Meredith
Keyword(s):  
New South ◽  
New South Wales ◽  
South Wales
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