Pearsonellum-Corventum, Gen-Nov Et Sp-Nov (Digenea, Sanguinicolidae), in Serranid Fishes From the Capricornia Section of the Great-Barrier-Reef

1989 ◽  
Vol 37 (1) ◽  
pp. 71 ◽  
Author(s):  
RM Overstreet ◽  
M Koie
Keyword(s):  
Great Barrier Reef ◽  
Seminal Vesicle ◽  
Barrier Reef ◽  
External Seminal Vesicle ◽  
Blood Fluke ◽  
Type Host ◽  
Digenetic Trematodes ◽  
Plectropomus Leopardus ◽  
Single Testis

Pearsonellum corventum, gen. et sp. nov., is described from the heart of Plectropomus leopardus (type host), Epinephelus quoyanus, E. merra, and E. ongus from the vicinity of Heron I. in the Great Barrier Reef. It has body spines in ventrolateral transverse rows, an X-shaped intestine with long posterior caeca, a single testis, a unique auxillary external seminal vesicle, a well-developed cirrus sac, a post-testicular ovary, a partly preovarian uterus, and a well-developed metraterm. Those characteristics support a closer relationship among many piscine blood fluke genera than indicated by the seven subfamilies recognised in Yamaguti's 'Synopsis of Digenetic Trematodes of Vertebrates'.

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.

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.

Trigonocephalotrema (Digenea : Haplosplanchnidae), a new genus for trematodes parasitising fishes of two Indo-West Pacific acanthurid genera

2018 ◽  
Vol 32 (4) ◽  
pp. 759 ◽  
Author(s):  
Daniel C. Huston ◽  
Scott C. Cutmore ◽  
Thomas H. Cribb
Keyword(s):  
Great Barrier Reef ◽  
Molecular Data ◽  
28S Rrna ◽  
Barrier Reef ◽  
Digenetic Trematodes ◽  
Rrna Species ◽  
Tree Topologies ◽  
Diverse Community ◽  
Morphological And Molecular Data ◽  
Three New Species

The Great Barrier Reef is the largest coral reef ecosystem on the planet and supports a diverse community of marine fishes, as well as the organisms that parasitise them. Although the digenetic trematodes that parasitise fishes of the Great Barrier Reef have been studied for over a century, the species richness and diversity of many trematode lineages is yet to be explored. Trigonocephalotrema, gen. nov. is proposed to accommodate three new species, Trigonocephalotrema euclidi, sp. nov., T. hipparchi, sp. nov. and T. sohcahtoa, sp. nov., parasitic in fishes of Naso Lacepède and Zebrasoma Swainson (Acanthuridae) in the tropical Pacific. Species of Trigonocephalotrema are characterised with morphological and molecular data (18S rRNA, ITS2 and 28S rRNA). Species of Trigonocephalotrema are morphologically distinguished from all other haplosplanchnid lineages by having terminal, triangular, plate-like oral suckers. With the inclusion of the new molecular data, Bayesian inference and maximum likelihood analyses of the Haplosplanchnidae Poche, 1926 recovered identical tree topologies and demonstrated Trigonocephalotrema as a well-supported monophyletic group. Although species of Trigonocephalotrema are differentiated from all other haplosplanchnid lineages on the basis of morphology, species within the genus are morphologically cryptic; thus, accurate species identification will require inclusion of host and molecular data. Species of Trigonocephalotrema cannot be assigned to a recognised subfamily within the Haplosplanchnidae using either morphological or molecular data and would require the erection of a new subfamily to accommodate them. However, we find little value in the use of subfamilies within the Haplosplanchnidae, given that there are so few taxa in the family, and herein propose that their use be avoided.

Fellodistomidae and Lepocreadiidae (Platyhelminthes : Digenea) from chaetodontid fishes (Perciformes) from Heron Island, southern Great Barrier Reef, Queensland, Australia

1994 ◽  
Vol 8 (3) ◽  
pp. 545 ◽  
Author(s):  
RA Bray ◽  
TH Cribb ◽  
SC Barker
Keyword(s):  
Great Barrier Reef ◽  
New Combination ◽  
Barrier Reef ◽  
Type Host

Eight species of digenean parasite are described or redescribed from chaetodontid fishes from the southern Great Barrier Reef at Heron Island, Queensland. Six of these species belong to the Fellodistomidae: Symmetrovesicula chaetodontis (from Chaetodon aureofasciatus, C. bennetti, C. plebeius, C. rainfordi, C. speculum and C. trifosciatus), Paradiscogaster chaetodontis (from Chaetodon auriga, C, lineolatus, C. melannotus, C, plebeius, C. ulietensis and Heniochus chrysostomus), Paradiscogaster flindersi, sp. nov. (from Chaetodon ornatissimus [type-host], C. plebeius, C. rainfordi, C. trifascialis, C. trifasciatus and Heniochus varius), Paradiscogaster eniwetokensis (from Chaetodon aureofasciatus, C. baronessa, C. bennetti, C. flavirostris, C. ornatissimus, C. plebeius, C, rainfordi, C, speculum, C. trifascialis, C. ulietensis, C. unimaculatus, Chelmon rostratus and Heniochus varius), Paradiscogaster quasimodo, sp. nov. (from Chaetodon auriga, C. lineolatus, C. ulietensis and [?] C. ornatissimus) and Paradiscogaster glebulae, sp. nov. (from C. aureofasciatus C. bennetti, C. citrinellus, C. mertensii, C. ornatissimus, C. rainfordi, C. speculum, C. unimaculatus and Heniochus varius). The remaining two species belong to the Lepocreadiidae: Multitestis pyriformis (from Coradion chrysozonus) and Neohypocreadium dorsoporum (from Chaetodon aureofasciatus, C. auriga, C. flavirostris, C. kleinii, C. lineolatus, C. melannotus, C. pelewensis, C. plebeius, C. ulietensis, C. vagabundus, Heniochus chrysostomus and Parachaetodon ocellatus). The new combination Neohypocreadium chaetodoni (Madhavi, 1972) [originally in Preptetos] is made. A key to the species of Parodiscogaster is given.

Geographic variation in the sex ratio, sex specific size, and age structure of Plectropomus leopardus (Serranidae) between reefs open and closed to fishing on the Great Barrier Reef

2000 ◽  
Vol 57 (7) ◽  
pp. 1448-1458 ◽  
Author(s):  
S Adams ◽  
B D Mapstone ◽  
G R Russ ◽  
C R Davies
Keyword(s):  
Sex Ratio ◽  
Great Barrier Reef ◽  
Age Structure ◽  
Spatial Scales ◽  
Geographic Region ◽  
Minimum Size ◽  
Barrier Reef ◽  
Reproductive Parameters ◽  
Size And Age Structure ◽  
Plectropomus Leopardus

Variation in reproductive parameters of Plectropomus leopardus populations between coral reefs open and closed to fishing was examined in two geographic regions (off Townsville (19°S) and in the Swains (22°S)) of the Great Barrier Reef, Australia. The reproductive parameters that were examined included the operational (reproductive) sex ratio and size and age structure of mature females, sex-changing individuals (transitionals), and mature males. There was a greater proportion of males above the minimum size and age of harvest on reefs closed to fishing for 8-10 years than on reefs open to fishing, although the effect varied with geographic region. Nevertheless, neither the sex ratio, mean age, nor mean size of males or transitionals varied significantly with reef closure status. Females, however, were significantly older and larger on closed than on open reefs in both regions. Marked regional variations in the sex ratio and average age of transitionals were found independent of reef closure status, suggesting regional variation in reproductive strategies. Controlled manipulations, inclusion of broad spatial scales, and detailed studies of intra- and inter-specific variation in serranid reproductive biology are necessary to resolve such complexities in the responses of protogynous serranids to fishing pressure and management strategies.

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.

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