Seasonality of asexual reproduction in Holothuria ( Halodeima ) atra , H. ( H. ) edulis and Stichopus chloronotus (Holothuroidea: Aspidochirotida) on the Great Barrier Reef

1997 ◽  
Vol 129 (3) ◽  
pp. 435-441 ◽  
Author(s):  
S. Uthicke
Keyword(s):  
Great Barrier Reef ◽  
Asexual Reproduction ◽  
Barrier Reef ◽  
Stichopus Chloronotus

Influence of asexual reproduction on the structure and dynamics of Holothuria (Halodeima) atra and Stichopus chloronotus populations of the Great Barrier Reef

2001 ◽  
Vol 52 (2) ◽  
pp. 205 ◽  
Author(s):  
S. Uthicke
Keyword(s):  
Great Barrier Reef ◽  
Asexual Reproduction ◽  
Fission Products ◽  
Barrier Reef ◽  
Frequency Distributions ◽  
Near Shore ◽  
Wet Weight ◽  
Stichopus Chloronotus ◽  
Holothuria Atra ◽  
Individual Size

To determine the effect of asexual reproduction by transverse fission on the population structure of holothurians, ensities and individual weights of Holothuria atra (JÄÄger,1833)and Stichopus chloronotus (Brandt, 1835)were measured over a 26-month period on near-shore reefs of the Great Barrier Reef. Densities of H.atra (0.01—0.69 individuals m –2 )and S. chloronotus (0.11—1.67) did not increase during periods of intense asexual reproduction, and the density on each reef remained relatively stable.The effect of fission was clearly visible in the weight —frequency distributions of both species. The average individual wet weight in each population declined (H. atra from 105/134 g to 64/94 g in two respective populations;S. chloronotus from 128/302 g to 82/190 g in two respective populations) with the onset of fission in early winter, and more individuals in the weight range of fission products were found. The biomass followed the seasonal trend of the average weights for both species, with minimum values in winter. A conceptual model based on these and previous findings identified five possible factors (mortality, habitat stability, optimum individual size, food availability, larval supply) involved in promoting or repressing transverse fission, and the model indicated the consequences for the population.

Management of Water Quality in the Great Barrier Reef Marine Park

1989 ◽  
Vol 21 (2) ◽  
pp. 31-38 ◽  
Author(s):  
Simon Woodley
Keyword(s):  
Water Quality ◽  
Coral Reef ◽  
Great Barrier Reef ◽  
Barrier Reef ◽  
Management Issue ◽  
Reef System ◽  
Marine Park ◽  
World Heritage List ◽  
The World ◽  
Coral Reef System

The Great Barrier Reef is the largest coral reef system in the world. It is recognised and appreciated worldwide as a unique environment and for this reason has been inscribed on the World Heritage List. The Reef is economically-important to Queensland and Australia, supporting substantial tourism and fishing industries. Management of the Great Barrier Reef to ensure conservation of its natural qualities in perpetuity is achieved through the establishment of the Great Barrier Reef Marine Park. The maintenance of water quality to protect the reef and the industries which depend on it is becoming an increasingly important management issue requiring better knowledge and possibly new standards of treatment and discharge.

Sign in / Sign up

Export Citation Format

Share Document