scholarly journals Periodicity of spawning aggregations of coral trout Plectropomus leopardus (Pisces:Serranidae) on the northern Great Barrier Reef

1997 ◽  
Vol 160 ◽  
pp. 149-159 ◽  
Author(s):  
MA Samoilys
Keyword(s):  
Great Barrier Reef ◽  
Barrier Reef ◽  
Coral Trout ◽  
Spawning Aggregations ◽  
Plectropomus Leopardus

A new species of Stephanostomum Looss, 1899 (Digenea, Acanthocolpidae) with a bizarre oral sucker: S. adlardi sp. nov. from the common coral trout Plectropomus leopardus (Lacepède, 1802) (Perciformes, Serranidae) from Lizard Island, Great Barrier Reef

2007 ◽  
Vol 52 (3) ◽  
Author(s):  
Rodney Bray ◽  
Thomas Cribb ◽  
Andrea Waeschenbach ◽  
D. Littlewood
Keyword(s):  
New Species ◽  
Great Barrier Reef ◽  
Oral Sucker ◽  
Ribosomal Rna ◽  
Barrier Reef ◽  
Coral Trout ◽  
Lizard Island ◽  
The Common ◽  
Plectropomus Leopardus ◽  
A New Species

AbstractA new species of Acanthocolpidae, Stephanostomum adlardi is described from the serranid Plectropomus leopardus from Lizard Island in the northern Great Barrier Reef. It differs from all previously described acanthocolpids in the structure of the oral sucker which is extended into dorsal and ventral lobes each bearing a row of spines. A phylogenetic tree estimated from combined nuclear small and partial large ribosomal RNA gene sequences shows that, despite the unusual oral sucker structure, the species is a true member of the genus Stephanostomum. The molecular results also suggest that Monostephanostomum nolani is derived from within Stephanostomum.

Population estimates and size structure of Plectropomus leopardus (Pisces : Serranidae) in relation to no-fishing zones: mark-release-resighting and underwater visual census

2000 ◽  
Vol 51 (3) ◽  
pp. 221 ◽  
Author(s):  
D. C. Zeller ◽  
G. R. Russ
Keyword(s):  
Great Barrier Reef ◽  
Population Size ◽  
Size Structure ◽  
Barrier Reef ◽  
Visual Census ◽  
Underwater Visual Census ◽  
Coral Trout ◽  
Population Size Estimates ◽  
Lizard Island ◽  
Plectropomus Leopardus

A mark–release–resighting (MRR) technique was used to estimate population size of the coral trout, Plectropomus leopardus, on coral reefs fringing Lizard Island, Great Barrier Reef, Australia. Fish were captured by hook-and-line fishing, and marked with individual freeze-brand numbers in August 1995. An underwater visual census (UVC) technique was used during September and October 1995 both for resighting of marked fish and to make an independent estimate of fish density and thus population size. The study area was 750 966 m2 . The UVC sampled 154 000 m2 (20.5%) of this area. Six different methods of analysis of MRR gave similar population size estimates (e.g. Petersen 12 873; 95% CI 9989–15 754) extrapolated to the 4.5 million-m2 reef area from datum to 20-m depth around Lizard Island. UVC gave a population size estimate (24 182; 95% CI 21 860–26 504) twice that of MRR. The lower estimate derived from MRR may be the result of tag-induced mortality, or of the relative difficulty in discriminating between marked and unmarked trout by UVC. This is only the second estimate of population size of coral trout on an area of the Great Barrier Reef.

Mortality rate of a cohort of the coral trout, Plectropomus leopardus, in zones of the Great Barrier Reef Marine Park closed to fishing

1998 ◽  
Vol 49 (6) ◽  
pp. 507 ◽  
Author(s):  
Garry R. Russ ◽  
Dong C. Lou ◽  
James B. Higgs ◽  
Beatrice P. Ferreira
Keyword(s):  
Mortality Rate ◽  
Great Barrier Reef ◽  
Small Sample ◽  
Barrier Reef ◽  
Coral Trout ◽  
Marine Park ◽  
Plectropomus Leopardus ◽  
Catch Rates ◽  
Small Sample Sizes ◽  
Annual Mortality

From 1990 to 1993, samples of coral trout, Plectropomus leopardus, were collected at two coral reefs closed to fishing since 1987 in the central Great Barrier Reef (GBR). The age structure was dominated by a strong cohort which settled in early 1984 and which accounted for 54%, 45%, 42% and 36% of the experimental hook-and-line catches at Glow and Yankee reefs. Catch rates (fish person-1 hour-1) per age class per reef per year provide the first reliable estimates of the exponential rate of mortality of coral trout in zones of the GBR Marine Park closed to fishing. The annual mortality rate between the ages of 6 and 9 years was 0.115 (s.e. 0.040) at Glow reef and 0.189 (s.e. 0.100) at Yankee reef. The annual mortality rate between ages 6 and 9 years was 0.147 (s.e. 0.028) at the two reefs combined. Age-specific estimates of annual mortality ranged from 0.024 (age 7–8 at Glow) to 0.442 (age 6–7 at Yankee) but were unreliable because of small sample sizes. This is one of the first estimates of mortality rate of an exploited species in an area closed to fishing in the tropics.

Effects of fishing on a protogynous hermaphrodite

2001 ◽  
Vol 58 (3) ◽  
pp. 568-578 ◽  
Author(s):  
Paul R Armsworth
Keyword(s):  
Great Barrier Reef ◽  
Population Dynamic ◽  
Dynamic Models ◽  
Barrier Reef ◽  
Coral Trout ◽  
Precise Understanding ◽  
Protogynous Hermaphrodite ◽  
Reef Fish Species ◽  
Plectropomus Leopardus ◽  
Behavioural Mechanism

Population dynamic models and simulations are analysed for a harvested reef fish species that is a monandric, protogynous hermaphrodite. The models are applied to data for the coral trout Plectropomus leopardus (Pisces: Serranidae) on the Great Barrier Reef. One model examines the situation where sexual transition is induced by some exogenous behavioural mechanism, and another considers the case where transition is determined by some endogenous developmental schedule. The conclusions regarding the effects of fishing are common to both models, and the implementation of more efficient harvesting practices may not require a precise understanding of the mechanisms governing sexual transition.

scholarly journals Comparative demography of commercially important species of coral grouper, Plectropomus leopardus and P. laevis , from Australia's great barrier reef and Coral Sea marine parks

2020 ◽  
Vol 97 (4) ◽  
pp. 1165-1176
Author(s):  
Samuel D. Payet ◽  
Jake R. Lowe ◽  
Bruce D. Mapstone ◽  
Morgan S. Pratchett ◽  
Tane H. Sinclair‐Taylor ◽  
...  
Keyword(s):  
Great Barrier Reef ◽  
Barrier Reef ◽  
Important Species ◽  
Coral Sea ◽  
Comparative Demography ◽  
Commercially Important ◽  
Plectropomus Leopardus

Response by Plectropomus-Leopardus and Other Serranid Fishes to Pearsonellum-Corventum (Digenea, Sanguinicolidae), Including Melanomacrophage Centers in the Heart

1989 ◽  
Vol 37 (1) ◽  
pp. 129 ◽  
Author(s):  
RM Overstreet ◽  
J Thulin
Keyword(s):  
Foreign Body ◽  
Gulf Of Mexico ◽  
Great Barrier Reef ◽  
Foreign Bodies ◽  
Body Cavity ◽  
The Body ◽  
Barrier Reef ◽  
Geographic Regions ◽  
Plectropomus Leopardus ◽  
Normal Feature

Adults of the blood fluke Pearsonellum corventum in the heart of Plectropomus leopardus from the Great Barrier Reef evoked a detectable response, but the continual production of their eggs induced a more significant response, including an abundance of melanomacrophage centres (MMCS) and granuloma formation in the ventricle as well as in other visceral organs. MMCs have not been recognised previously as a component of the ventricular spongiosis layer in fishes, but they were a normal feature of the infected and perhaps all P. leopardus as well as certain other serranids. Moreover, at least P. leopardus and certain nonserranid fishes from the Gulf of Mexico contain an abundance of free macrophages among ventricular myocardial and endocardia1 tissues. Because of those MMCS and free macrophages in P. leopardus, as well as an apparently independent extensive response involving pigmented fibrotic encapsulation of foreign bodies in the body cavity in that and other serranids from the Gulf of Mexico and Red Sea, P. leopardus and probably several other serranids should provide especially valuable models to assess macrophages and nonspecific pigmented foreign body responses. Sections in the heart of two serranids from other geographic regions exhibited what appeared to be different sanguinicolid eggs, and those fishes responded differently to P. leopardus.

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