scholarly journals Breeding biology, and egg and larval development ofGalaxias rostratusKlunzinger, the Murray Jollytail from inland New South Wales

2005 ◽  
Vol 33 (2) ◽  
pp. 141-165 ◽  
Author(s):  
L. C. Llewellyn
Keyword(s):  
Larval Development ◽  
New South ◽  
New South Wales ◽  
Breeding Biology ◽  
South Wales

Differences in morphology and reproduction of the barnacles Elminius covertus and Hexaminius spp. from mangrove forests in the Sydney region of New South Wales

1996 ◽  
Vol 47 (5) ◽  
pp. 715 ◽  
Author(s):  
PM Ross
Keyword(s):  
Larval Development ◽  
Reproductive Output ◽  
New South ◽  
New South Wales ◽  
Avicennia Marina ◽  
Mangrove Forests ◽  
South Wales ◽  
Juvenile Stages ◽  
Grey Mangrove

E. covertus is found on bark and leaves of the grey mangrove Avicennia marina, H. foliorum is found on leaves and H. popeiana is found on bark. 7655 barnacles were collected from two sites at Woolooware Bay from winter 1987 to summer 1989. Reproductive and external features in E. covertus differed depending on the substratum on which it lived; reproductive output was greater on leaves than on bark. The genus Hexaminius has been classified elsewhere as two species on the basis of external features and reproductive differences of adults, larval development and larval setation; however, the adults were living on different substrata. A detailed study of larval and juvenile stages of Hexaminius in the field showed no differences in external features until juveniles were one month old and no differences in the time taken to rear cyprid larvae. This suggests that Hexaminius should not continue to be divided into two species.

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.

Myzostoma seymourcollegiorum n.sp. (Myzostomida) from southern Australia, with a description of its larval development

Zootaxa ◽  
2005 ◽  
Vol 1010 (1) ◽  
pp. 53 ◽  
Author(s):  
GREG W. ROUSE ◽  
MARK J. GRYGIER
Keyword(s):  
New Species ◽  
Larval Development ◽  
New South ◽  
New South Wales ◽  
South Australia ◽  
Circular Shape ◽  
Early Stages ◽  
South Wales ◽  
Eastern Australia

Few Myzostomida have been recorded from southern Australian waters. Most myzostome taxa to date have been described from the warmer waters of the Indo-Pacific, where their crinoid echinoderm hosts are most diverse. In this paper a new myzostome, Myzostoma seymourcollegiorum n. sp., is described from the crinoid Cenolia trichoptera (Comasteridae) taken from Encounter Bay near Adelaide, South Australia; further records suggest its range extends also to Tasmania and around eastern Australia to central New South Wales. Myzostoma seymourcollegiorum n. sp. is an ectocommensal on C. trichoptera and C. glebosus and there has previously been no myzostome recorded from any species of Cenolia. The new species resembles a number of other Myzostoma species that are quite flat and have a nearly circular shape with 20 short marginal cirri. The early stages of its larval development are also outlined and compared with those of other Myzostomida.

Laval development of the Megabalanine Balanomorph Austromegabalanus nigrescens (Lamarck) (Cirripedia, Balanidae)

1987 ◽  
Vol 38 (4) ◽  
pp. 511 ◽  
Author(s):  
EA Egan ◽  
DT Anderson
Keyword(s):  
Larval Development ◽  
Long Range ◽  
New South ◽  
New South Wales ◽  
Mantle Cavity ◽  
Early Spring ◽  
Dorsal Shield ◽  
Late Autumn ◽  
Larval Stages ◽  
South Wales

The presence of embryos in the mantle cavity of A. nigrescens was monitored over a 2-year period. A, nigrescens maintains some breeding individuals throughout the year but shows peak breeding during the late autumn, winter and early spring in the vicinity of Sydney, New South Wales, Australia. The larval stages of A. nigrescens are described from larvae reared in the laboratory. A. nigrescens larvae can be easily distinguished from other nauplii described from balanomorphs of New South Wales by their distinctive marginal spines and paired dorsal shield spines. The duration of larval development in A. nigrescens, 13-23 days, is similar to that of other Australian balanids and does not appear to accord with the concept that the distribution of Austromegabalanus species has involved long-range epiplanktonic dispersal. The separation of Austromegabaianus, Notomegabalanus and Megabalanus is supported by larva! differences.

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