Studies on monogeneans and copepods parasitizing the gills of a sparid (Acanthopagrus australis (Günther)) in northern New South Wales

1986 ◽  
Vol 64 (4) ◽  
pp. 841-849 ◽  
Author(s):  
Frank R. Roubal
Keyword(s):  
Developmental Stage ◽  
Host Response ◽  
New South ◽  
New South Wales ◽  
Host Tissue ◽  
Tissue Response ◽  
Feeding Strategies ◽  
Minor Response ◽  
South Wales ◽  
A Minor

Degree of host tissue response to monogenean (Lamellodiscus acanthopagri, L. major, L. squamosus, Haliotrema spariensis, Polylabroides multispinosus) and copepod (Ergasilus sp., Lernanthropus atrox, Alella macrotrachelus) parasites on the gills of Acanthopagrus australis varied with developmental stage and among species. The histophagous ancyrocephalines L. acanthopagri and L. squamosus and the sanguinivorous polyopisthocotylean P. multispinosus elicited no host response. In contrast, phylogenetic relatives of the former two species, L. major and H. spariensis, were associated with extensive hyperplasia of the filament. Among the copepods, Ergasilus sp. elicited a minor response. However, larval, subadult, and adult A. macrotrachelus were associated with increasing extents of filament alteration. Similarly, adult L. atrox were associated with massive hyperplasia which often included adjacent filaments. The observed variability in tissue response is discussed in terms of parasite attachment, mobility, and feeding strategies.

Breeding Behaviour and Ecology of the Australian Pelican, Pelecanus Conspicillatus, in New South Wales.

1977 ◽  
Vol 4 (1) ◽  
pp. 37 ◽  
Author(s):  
WJM Vestjens
Keyword(s):  
New South ◽  
New South Wales ◽  
Perca Fluviatilis ◽  
Freshwater Crayfish ◽  
Goldfish Carassius Auratus ◽  
Cherax Destructor ◽  
South Wales ◽  
Perch Perca Fluviatilis ◽  
Competition For Food ◽  
A Minor

Australian pelicans (Pelecanus conspicillatus) were studied in colonies at 2 lakes in New South Wales. Adults regurgitated food for the young. Those up to 2 weeks old took liquid food from inside the tip of the adult's upper beak. Older ones took solid food from the adult's gullet, to age of about 3.5 months. After being fed, the young had convulsions lasting about 1 min; that did not happen after a second feeding immediately after the convulsion. Where there were 2 young of different sizes, only the larger convulsed, and sometimes the smaller was prevented from feeding and died of starvation. The survivor continued to have convulsions after feeding, as did single young, when there was no competition for food. Food was mainly fish; the most abundant fish was goldfish (Carassius auratus); a minor item was perch (Perca fluviatilis). Fish were 60 to 247 mm long and weighed 17 to 320 g. Crustaceans were less important and included freshwater crayfish (Cherax destructor) and shrimp (Macrobrachius sp.).

Zirconium-rich Sodic Pyroxenes in Felsic Volcanics from the Warrumbungle Volcano, Central New South Wales, Australia

1988 ◽  
Vol 52 (367) ◽  
pp. 491-496 ◽  
Author(s):  
M. B. Duggan
Keyword(s):  
Late Stage ◽  
New South ◽  
New South Wales ◽  
Low Oxygen ◽  
Ferromagnesian Mineral ◽  
South Wales ◽  
Coupled Substitution ◽  
Host Lava ◽  
A Minor ◽  
Felsic Rocks

AbstractSoda-rich pyroxenes in felsic rocks from the Warrumbungle Volcano, central New South Wales, contain up to 14.5 wt. % ZrO2, which is more than double the previously reported maximum ZrO2 in pyroxene. Zr is believed to enter aegirine as the component Na(Fe2+,Mn,Mg)0.5Zr0.5Si2O6 via the coupled substitution: (Fe2+,Mn,Mg)VI+ZrVI = 2(Fe3+)VI. This component exceeds 50 mol. % in some analyses.Pronounced pyroxene Zr-enrichment is restricted to rocks in which sodic amphibole is the major ferromagnesian mineral, with pyroxene only a minor late-stage phase. The Zr-rich pyroxenes resulted from a combination of host lava peralkalinity, low oxygen fugacity, rapid disequilibrium crystallization and low mobility of the Zr ion. These factors collectively led to the development of interstitial Zr-enriched microdomains in the felsic hosts during their final stages of crystallization.

Pyrophyllite-bearing flint clay from the Cambewarra area, New South Wales

Clay Minerals ◽  
1971 ◽  
Vol 9 (1) ◽  
pp. 83-95 ◽  
Author(s):  
F. C. Loughnan ◽  
C. R. Ward
Keyword(s):  
North America ◽  
Clay Mineral ◽  
Mixed Layer ◽  
New South ◽  
New South Wales ◽  
Minor Constituent ◽  
South Wales ◽  
A Minor ◽  
Coal Measures ◽  
Thick Deposit

AbstractA thick deposit of flint clay in the Permian I llawarra Coal Measures of the southern part of the Sydney Basin, New South Wales, is described. The flint clays which have affinities with those of the Pennsylvanian of North America and with the kaolin coal tonsteins of the Westphalian, are associated with red-brown claystones that contain in addition to hematite, an abundance of a regular mixed layer clay mineral. Pyrophyllite generally forms a minor constituent only of the flint clays but in one part of the deposit it is more abundant than kaolinite. Although there are many puzzling aspects concerning the origin of the deposit, evidence suggests that the kaolinite and the pyrophyllite in the flint clays are detrital.

Sign in / Sign up

Export Citation Format

Share Document