Abundance and biology of warty oreo (Allocyttus verrucosus) and spiky oreo (Neocyttus rhomboidalis) (Oreosomatidae) off south-eastern Australia

1997 ◽  
Vol 48 (2) ◽  
pp. 91 ◽  
Author(s):  
J. M. Lyle ◽  
D. C. Smith
Keyword(s):  
Continental Slope ◽  
Reproductive Biology ◽  
Size Structure ◽  
Depth Range ◽  
South Eastern ◽  
Species Overlap ◽  
Eastern Australia ◽  
Prey Items ◽  
South Eastern Australia ◽  
Depth Distributions

The distribution, abundance, size structure, reproductive biology and diet of warty oreo, Allocyttus verrucosus (Gilchrist), and spiky oreo, Neocyttus rhomboidalis (Gilchrist), from the continental slope region (400-1200 m depth) of south-eastern Australia are described. The depth distributions of the two species overlap, with spiky oreo being more abundant in intermediate depths (600-800 m) and warty oreo abundance peaking at greater depths (900-1200 m). There was evidence of size structuring with depth. Warty oreo juveniles and subadults were comparatively more abundant in depths of less than 1000 m and adults dominated at greater depths. In spiky oreo, juveniles were largely restricted to the depth range of 700-900 m. Size at 50% maturity in females was 28 and 35 cm for warty and spiky oreos, respectively. Males mature at slightly smaller sizes. Spawning occurs in May–June for warty oreo and between August and October for spiky oreo. Just prior to spawning in warty oreo the sexes appear to segregate by depth, with females becoming progressively more dominant with depth. Both species are benthopelagic feeders, consuming a range of prey items including crustaceans, fish and squid. Salps were also an important component of the diet of spiky oreo.

Feeding ecology of Macruronus novaezelandiae (Hector) (Teleostei : Merlucciidae) in south-eastern Australia

1986 ◽  
Vol 37 (5) ◽  
pp. 621 ◽  
Author(s):  
CM Bulman ◽  
SJM Blaber
Keyword(s):  
Continental Slope ◽  
Feeding Ecology ◽  
Regional Variation ◽  
Bomb Calorimetry ◽  
South Eastern ◽  
Diel Vertical Migrations ◽  
Eastern Australia ◽  
Myctophid Fish ◽  
Prey Items ◽  
South Eastern Australia

The diet and feeding ecology of the demersal merlucciid M. novaezelandiae from three areas of the upper continental slope (420-550 m) of south-eastern Australia are described. The food consists almost entirely of mesopelagic fauna. The major prey are myctophid fish Lampanyctodes hectoris, other fishes, natant decapods, euphausiids and squid. Energy values of major prey items were determined by bomb calorimetry. Although euphausiids occur frequently in the diet, fish make up 90% of the energy intake. There is little regional variation. M. novaezelandiae undertakes diel vertical migrations that are similar to those of its prey, bringing it within 50 m of the surface at night. There is a seasonal trend towards cannibalism by adults on juveniles.

Triaina, a new genus in the Janirellidae Menzies, 1956 (Crustacea: Isopoda: Asellota), with two new species from south-eastern Australia, and a new diagnosis for the family

Zootaxa ◽  
2009 ◽  
Vol 1980 (1) ◽  
pp. 1-15 ◽  
Author(s):  
JEAN JUST
Keyword(s):  
New Species ◽  
New Genus ◽  
Depth Range ◽  
Diverse Range ◽  
South Eastern ◽  
Eastern Australia ◽  
The Family ◽  
Two New Species ◽  
New Diagnosis ◽  
South Eastern Australia

The varying concepts of Janirellidae Menzies, 1956 are outlined, including its rejection by several authors. The view of Wilson and Wägele of Janirellidae being a valid family comprising Janirella Bonnier, 1896 and presumably Dactylostylis Richardson, 1911 (= Spinianirella Menzies, 1962) is accepted. Diagnoses of the Janirellidae subsequent to Menzies’ original one were based on the inclusion of a diverse range of genera now recognised as not belonging in that family. A new diagnosis of Janirellidae is presented based on the inclusion of Janirella, Dactylostylis, and a new genus Triaina with two new species, T. isodonte and T. makridonte, from south-eastern Australia. The latter species represents the shallowest record (80 m) of the otherwise predominantly deep-water family. All species in the family are listed in an appendix, with area of type locality and depth range.

Skinks and burrowing crayfish as prey items of the Eastern Yellow Robin Eopsaltria australis in south-eastern Australia

2016 ◽  
Vol 33 ◽  
pp. 57-60 ◽  
Author(s):  
Valerie La May ◽  
Martin O’Brien ◽  
Con Boeke ◽  
Kathy Costello ◽  
Geoff Park ◽  
...  
Keyword(s):  
South Eastern ◽  
Eastern Australia ◽  
Prey Items ◽  
South Eastern Australia

scholarly journals Reproductive biology of female blue swimmer crabs in the temperate estuaries of south-eastern Australia

2021 ◽  
Author(s):  
Samuel E. F. Nolan ◽  
Daniel D. Johnson ◽  
Roshan Hanamseth ◽  
Iain M. Suthers ◽  
Matthew D. Taylor
Keyword(s):  
Reproductive Biology ◽  
South Eastern ◽  
Eastern Australia ◽  
South Eastern Australia

Demographics of tiger quoll (Dasyurus maculatus maculatus) populations in south-eastern Australia

2003 ◽  
Vol 51 (6) ◽  
pp. 611 ◽  
Author(s):  
C. A. Belcher
Keyword(s):  
Size Structure ◽  
Selective Logging ◽  
Population Declines ◽  
Adult Weight ◽  
South Eastern ◽  
Size And Age Structure ◽  
Eastern Australia ◽  
Poison Baiting ◽  
Female Weight ◽  
South Eastern Australia

The tiger quoll is a large marsupial carnivore that occurs in forested habitat in south-eastern Australia. Three tiger quoll populations were trapped for up to six years and data on population parameters, including size, structure, sex ratio, adult : subadult ratio, weight, breeding characteristics, age and longevity were recorded for each population. Sex ratios (♂ : ♀) varied from 5 : 1 to 0 : 1. Population size and age structure reflected previous mortality events and social organisation traits, with all populations showing signs of instability due to disturbance events. Males did not reach full adult weight until three years of age and females until two years. Mean adult male weight was 2.81 kg ± 0.50 (s.d.) (range 2.0–4.2 kg) and mean adult female weight was 1.73 kg ± 0.22 (s.d.) (range 1.2–2.1 kg). Most females did not breed before two years of age and were recorded breeding up to four years of age. A proportion of females did not appear to breed in consecutive years. Matings were estimated to have occurred between late June and early August and births between mid-July and late August. Pouch litter size varied from 4 to 6 with a mean of 5.38 ± 0.65 (s.d.). The adult to juvenile ratio suggests that the mean number of young weaned per female is probably as low as one or two. Monitoring of four females found that the average number of young weaned was three with a range of 2–4. The maximum age recorded was five years. Population declines were found to correlate with 1080 poison baiting programmes, but not with selective logging.

Nutrient enrichment of Jervis Bay, Australia, during the massive 1992 coccolithophorid bloom

1997 ◽  
Vol 48 (6) ◽  
pp. 473 ◽  
Author(s):  
Mark T. Gibbs ◽  
Patrick Marchesiello ◽  
Jason H. Middleton
Keyword(s):  
Numerical Simulation ◽  
Continental Slope ◽  
Nutrient Enrichment ◽  
Deep Ocean ◽  
East Australian Current ◽  
South Eastern ◽  
Eastern Australia ◽  
Cold Core ◽  
South Eastern Australia

A numerical simulation of the East Australian Current (EAC) has been used to investigate the nutrification of shelf waters at Jervis Bay, south-eastern Australia, prior to the massive coccolithophorid bloom that was first observed on 16 December 1992. The simulation suggests that a small cold-core eddy developed between the continental slope at Jervis Bay and the EAC jet further offshore during 7 and 14 December 1992. This unstable cold-core eddy is likely to have uplifted cold, nutrient-rich water onto the Jervis Bay shelf, and this upwelling, in combination with upwelling-favourable winds, probably transported nutrients from the deep ocean to the entrance of the bay.

An estimate of Bass Strait water Movement in the Western Tasman Sea during the Australian Coastal Experiment

1989 ◽  
Vol 40 (5) ◽  
pp. 465 ◽  
Author(s):  
M Tomczak ◽  
E Tanner
Keyword(s):  
Continental Slope ◽  
Water Movement ◽  
East Australian Current ◽  
Eddy Activity ◽  
South Eastern ◽  
Tasman Sea ◽  
Eastern Australia ◽  
South Eastern Australia

The presence and movement of Bass Strait Water along the continental slope of south-eastern Australia during the Australian Coastal Experiment (ACE) is estimated by evaluating the amount of salt and heat imported from Bass Strait for the five standard hydrographic ACE sections. South of Jervis Bay (35°S), the amounts decrease from September 1983 to February 1984 by a factor of two. North of Jervis Bay, the amounts depend strongly on the position of the East Australian Current and its eddies. It appears that during periods of low eddy activity Bass Strait Water can be carried northward well past Newcastle (33�S).

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