Effects of moon phase and soak time on catches of Jasus (Sagmariasus) verreauxi recruits on collectors

2003 ◽  
Vol 54 (7) ◽  
pp. 847 ◽  
Author(s):  
S. S. Montgomery ◽  
J. R. Craig
Keyword(s):  
Relative Abundance ◽  
Early Stage ◽  
New South ◽  
New South Wales ◽  
Moon Phase ◽  
The Moon ◽  
Lunar Periodicity ◽  
South Wales ◽  
Phases Of The Moon ◽  
Sagmariasus Verreauxi

The hypothesis tested in this study was that catches of recruits (sum of pueruli to early-stage juveniles of the same year class) of Jasus (Sagmariasus) verreauxi on seaweed-type collectors were affected by lunar periodicity and by the soak time of the collectors. Mean numbers of recruits did not differ between phases of the moon, but significantly more recruits were caught on collectors soaked for four weeks than on those soaked for three or two weeks, which in turn were greater than on those soaked for one week. On the basis of these results, it was recommended that collectors should be soaked for four weeks. This information was used in developing a uniform and optimal methodology for full surveys to monitor the relative abundance of recruits of J. verreauxi along the coast of New South Wales.

A note on the effects of browsing by feral goats on a Belah (Casuarina Cristata) - Rosewood (Heterodendrum Oleifolium) woodland.

1976 ◽  
Vol 1 (1) ◽  
pp. 7 ◽  
Author(s):  
AD Wilson ◽  
WE Mulham ◽  
JH Leigh
Keyword(s):  
Early Stage ◽  
New South ◽  
New South Wales ◽  
Weed Species ◽  
Mature Trees ◽  
The Third ◽  
South Wales ◽  
Observation Period

In a Belah - Rosewood woodland in western New South Wales, stocking with feral goats over a four year period effected changes in the composition of the tree and shrub component. The most readily browsed tree was Rosewood and mature trees of this species were stripped of foliage to a height of 2 m. At an early stage Desert broombush (Templetonia egena) and young Warrior bush (Apophyllum anomalum) were severely damaged and young Yarran (Acacia homalophylla) and Belah defoliated. Most defoliated Yarran died within the observation period. Two shrubs regarded as weed species, Punty bush (Cassia eremophila var. platypoda) and Desert cassia (C. eremophila var. coriacea) were heavily browsed in the third year and subsequently eliminated. The weed shrub Turpentine (Eremophila sturtizl was not browsed at any time.

Distribution and Relative Abundance of Feral Goats in the Rangelands of Eastern Australia.

1993 ◽  
Vol 15 (2) ◽  
pp. 331 ◽  
Author(s):  
C Southwell ◽  
K Weaver ◽  
N Sheppard ◽  
P Morris
Keyword(s):  
Relative Abundance ◽  
New South ◽  
New South Wales ◽  
Aerial Survey ◽  
South Wales ◽  
Eastern Australia ◽  
Goat Population ◽  
Arid Rangelands ◽  
Feral Goat ◽  
Semi Arid

An aerial survey of 966,000 km2 of the arid/semi-arid rangelands of Queensland and New South Wales in the winter of 1992 indicated a minimum feral goat population of almost 1 million animals (density 0.97�0.12/km2). Observed density (f standard error) was higher in New South Wales (1.51�0.23/km2) than in Queensland (0.47�0.09/km2).

Studies of the Ground-Dwelling Mammals of Eucalypt Forests in South-Eastern New South Wales: the Effect of Habitat Variables on Distribution and Abundance.

1995 ◽  
Vol 22 (3) ◽  
pp. 271 ◽  
Author(s):  
PC Catling ◽  
RJ Burt
Keyword(s):  
Relative Abundance ◽  
New South ◽  
New South Wales ◽  
Basal Area ◽  
Vegetation Communities ◽  
South Eastern ◽  
South Wales ◽  
Eucalypt Forests ◽  
Abundance And Distribution ◽  
Habitat Variables

The distribution and abundance was studied of ground-dwelling mammals in 13 areas within 500 000 ha of eucalypt (Eucalyptus spp.) forest in south-eastern New South Wales. Data are presented on the relative abundance and distribution of mammals in relation to the complexity of the habitat of the vegetation communities, basal area of the trees, and indices of nutrients in the foliage of the trees.

Life history of Mytilocypris henricae (Chapman) (Crustacea: Ostracoda) in Lake Bathurst, New South Wales

1985 ◽  
Vol 36 (6) ◽  
pp. 807 ◽  
Author(s):  
K Martens ◽  
P Deckker ◽  
TG Marples
Keyword(s):  
Life History ◽  
Larval Development ◽  
Relative Abundance ◽  
New South ◽  
New South Wales ◽  
Life Stages ◽  
Larval Stages ◽  
South Wales ◽  
Short Period ◽  
History Of

The life history of the halobiont ostracod M. henricae was studied over a 2.5-year period in Lake Bathurst, a slightly saline lake in New South Wales. Samples were collected monthly or bimonthly between March 1981 and May 1982 and weekly between August 1982 and June 1983. Relative abundance of all nine life stages (eight larval stages and one adult stage) in the samples was determined. Furthermore, in 10 selected monthly samples, sex-ratio, relative abundance of three female maturity stages and number of eggs in uteri of ovigerous females were monitored. Nearly all life stages were present throughout the year and M. henricae is thus a perennial form in Lake Bathurst. Relative abundance of life stages suggests that M. henricae produces three successive generations per year. The spring generation, hatched from eggs laid during winter, matures around November-December. Its larval development takes between 4 and 5 months. The summer generation matures after a larval development of 2.5 months; this short period is ascribed to more favourable temperatures. The autumn generation takes about 4 months to mature.

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