Survey of freshwater red algae (Rhodophyta) of south-eastern Australia

1984 ◽  
Vol 35 (2) ◽  
pp. 213 ◽  
Author(s):  
TJ Entwisle ◽  
GT Kraft
Keyword(s):  
Fresh Water ◽  
Red Algae ◽  
Algal Flora ◽  
South Eastern ◽  
Marine Habitats ◽  
Eastern Australia ◽  
Red Algal ◽  
Freshwater Habitats ◽  
Australian Freshwater ◽  
South Eastern Australia

A survey of rivers and other freshwater habitats in south-eastern Australia has resulted in the description and illustration of 14 species and two forms of red algae. With the exception of the two species of Nothocladus, all the taxa appear to be widespread in warm to cool temperate regions of the world. Three of the species [Chroodactylon ornatum (C.Ag.) Basson, Caloglossa leprieurii (Mont.) J.Ag. and Bostrychia scorpioides (Gmel.) Montagne] occur in brackish and marine habitats, as well as in fresh water. Two species [Hildenbrandia rivularis (Liebm.) J.Ag. and Audouinella hermannii Roth] are members of fundamentally marine genera that have one or a few distinct freshwater representatives. The remaining taxa belong to the genus Compsopogon (Compsopogonaceae, Erythropeltidales) and the family Batrachospermaceae (Nemaliales), which have no marine representatives and probably evolved in fresh water. This latter group consists of Compsopogon coeruleus (Balb.) Montagne, Batrachosperrnum atrum (Huds.) Harvey, B. ectocarpum Sirodot, B. Helminthoideum (Sirod.) Mori (two forms), B. keratophytum Bory, B. virgato-decaisneanum Sirodot, Sirodotia suecica Kylin (two forms), Nothocladus nodosus Skuja and N. lindaueri Skuja. The survey has added six new records to the Australian freshwater red algal flora. Nothocladus nodosus Skuja and N. tasmanicus Skuja are synonymized; N. lindaueri Skuja, previously recorded only from New Zealand, was found to be widely distributed in Victoria. Taxonomic characters in the genus Batrachospermum from Australia, the largest and most difficult group of species encountered, are reviewed.

Distribution and growth of juvenile mulloway, Argyrosomus hololepidotus (Pisces: Sciaenidae), in the Hawkesbury River, south-eastern Australia

1993 ◽  
Vol 44 (3) ◽  
pp. 401 ◽  
Author(s):  
CA Gray ◽  
VC McDonall
Keyword(s):  
Fresh Water ◽  
Relative Abundance ◽  
Salinity Gradient ◽  
Late Summer ◽  
River Otter ◽  
South Eastern ◽  
Total Length ◽  
Eastern Australia ◽  
South Eastern Australia

The distribution, recruitment, relative abundance and growth of juvenile mulloway, Argyrosomus hololepidotus Lacepede, was investigated in the Hawkesbury River. Otter trawling was used monthly between July 1986 and March 1988 at 12 sites along a salinity gradient over 85 km of the estuary. The greatest numbers of juveniles were caught at sites in the mid section of the estuary (20-40 km from the mouth) where salinities were greatly reduced. No A. hololepidotus were caught at sites that were permanently fresh water and few were caught at the marine-dominated sites closest to the mouth of the estuary. The greatest numbers of juveniles were caught between March and September (autumn-winter) and the fewest between October and January (spring-summer). Juveniles with an estimated age of 2-6 months were caught between February and July (late summer-winter) each year at a size of 30-150 mm total length. Juveniles increased in length by 80-100 mm between March and October.

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