Ecological Observations on Cerithium moniliferum Kiener (Gastropoda : Cerithiidae) and its Trematode Parasites at Heron Island, Great Barrier Reef

1979 ◽  
Vol 30 (3) ◽  
pp. 365 ◽  
Author(s):  
LRG Cannon
Keyword(s):  
Great Barrier Reef ◽  
The Body ◽  
Seasonal Patterns ◽  
Barrier Reef ◽  
Infection Rates ◽  
Body Whorl ◽  
Trematode Parasites ◽  
Growth And Reproduction

The distribution, abundance, growth and reproduction of a population of tropical intertidal gastropods, Cerithium moniliferum, at Heron Island, Great Barrier Reef, were examined and related to the incidence of parasitism by 11 digenean trematodes. The snails were patchily distributed on exposed beachrock, and showed little seasonally related change in abundance, but numbers and shell morphs were correlated with sand movements. Snails bred mainly in spring, had a thickened lip to the body whorl at this time and grew mainly from summer through winter, migrating to higher more exposed levels as they grew. There were no seasonal patterns of incidence with any or all trematodes, five of which were moderately common, though rarely did incidence exceed 20% of the population. Parasitism was more common in larger snails with thick lips and eroded shells found at the higher levels of the beachrock. Parasitism presumably steadily increases with age and size, but once infected, snails stop growing. Parasitized snails are castrated and presumably live for about 2-3 years by which time infection rates exceed 50%.

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.

Diploproctodaeum spp. (Digenea, Lepocreadiidae) in Australian and New Caledonian waters including two new species from Tetraodontiformes and new records of related species

2010 ◽  
Vol 55 (4) ◽  
Author(s):  
Rodney Bray ◽  
Thomas Cribb ◽  
Jean-Lou Justine
Keyword(s):  
Great Barrier Reef ◽  
Related Species ◽  
Convergent Evolution ◽  
New Records ◽  
New Caledonia ◽  
The Body ◽  
Barrier Reef ◽  
Lizard Island ◽  
New Hosts ◽  
Lagocephalus Sceleratus

AbstractDiploproctodaeum monstrosum sp. nov. is described from Arothron stellatus and A. mappa from off Lizard Island, northern Great Barrier Reef. It differs from its congeners in having a body-length ventral scoop. Diploproctodaeum triodoni sp. nov. is described from Triodon macropterus off New Caledonia. It is distinguished by the extensive vitelline fields usually reaching to the ventral sucker and the folded scoop margins. Other related species are reported from new hosts or localities and dimensions are supplied for: Diploproctodaeum haustrum from Aluterus monoceros off New Caledonia; Diploproctodaeum arothroni from Arothron hispidus off Lizard Island and Ningaloo Reef, northern Western Australia, A. nigropunctatus off Lizard Island and Arothron manilensis off New Caledonia; Diploproctodaeum macracetabulum from Abalistes stellatus on the Swain Reefs, southern Great Barrier Reef and off New Caledonia; Diploproctodaeum momoaafata from Ostracion cubicus off Lizard Island; Diploproctodaeum rutellum from Platax teira off Heron Island, southern Great Barrier Reef; Diploproctodaeoides longipygum from Abalistes stellatus on the Swain Reefs and off New Caledonia; Diplocreadium tsontso from Balistoides conspicillum off Heron Island; Bianium arabicum from Lagocephalus sceleratus off New Caledonia. Attention is drawn to apparent convergent evolution in the body form of several families of trematodes infecting tetraodontids and especially species of Arothron.

Microsporidiosis in prawns from Northern Australia

1988 ◽  
Vol 39 (3) ◽  
pp. 301 ◽  
Author(s):  
L Owens ◽  
JS Glazebrook
Keyword(s):  
Connective Tissue ◽  
Great Barrier Reef ◽  
Striated Muscle ◽  
The Body ◽  
Barrier Reef ◽  
Northern Australia ◽  
Brood Stock ◽  
Peripheral Muscle ◽  
Penaeus Semisulcatus ◽  
Low Prevalence

Two hundred thousand prawns from northern Australia were examined grossly for microsporidiosis. Ameson sp. was found infecting Penaeus semisulcatus, P. merguiensis and P. esculentus at low prevalence levels (<0.1%) across northern Australia. Thelohania sp, infected P. latisulcatus, P. longistylus and P. semisulcatus on the Great Barrier Reef, again at low prevalence levels (<0.1%). Histological attempts to find subclinical infections were unsuccessful. Ameson sp. infected the striated muscle bundles throughout the body, whereas Thelohania sp. infected mainly connective tissue, most organs and peripheral muscle bundles. Microsporidiosis is of concern, because it has been diagnosed from all areas where brood-stock females are collected for use in mariculture.

Two new jellyfishes (Cnidaria: Scyphozoa) from tropical Australian waters

Zootaxa ◽  
2008 ◽  
Vol 1764 (1) ◽  
pp. 41 ◽  
Author(s):  
LISA-ANN GERSHWIN ◽  
WOLFGANG ZEIDLER
Keyword(s):  
New Species ◽  
Body Size ◽  
Great Barrier Reef ◽  
Relative Position ◽  
First Record ◽  
The Body ◽  
Barrier Reef ◽  
Central Dome ◽  
The Past ◽  
Two New Species

Two new species of scyphozoan jellyfishes from tropical Australian waters are described. The first, Sanderia pampinosus, n. sp., from waters off northern Western Australia, represents the first record of the genus from Australia. It differs from its only other congener, S. malayensis Goette, 1886, in having: (1) almost double the number of gonadal papillae at about half the body size; (2) horseshoe-shaped gonadal rings; and (3) eradial tentacles that are flattened in the oral-aboral direction and have nematocyst clusters on all sides. The second species, Netrostoma nuda, n. sp., from the Great Barrier Reef region, has been erroneously identified in the past as N. coerulescens. Species distinctions in the genus rely on the number and relative position of warts or papillae on the central dome; in contrast, N. nuda lacks warts and papillae, and instead has a large gelatinous knob at the apex of the bell. A key to the species of Netrostoma is provided, along with a synoptic list of previous reports of scyphozoans in tropical Australian waters.

Morphology of Calydiscoides-Nemipteris, Sp-Nov (Monogenea), With a Redescription and Revision of the Genus

1989 ◽  
Vol 37 (1) ◽  
pp. 37 ◽  
Author(s):  
DA Thoney
Keyword(s):  
Great Barrier Reef ◽  
Type Species ◽  
Original Description ◽  
The Body ◽  
Barrier Reef ◽  
Copulatory Apparatus ◽  
Male Copulatory Apparatus

Calydiscoides nemipteris, sp. nov., was recovered from the gills of Scolopsis temporalis (Nemipteridae), collected near Heron I., Great Barrier Reef, Australia. Close examination of the squamodiscs on the opisthaptors of C. nemipteris, C, indianus, and the type-species, C, australis, revealed the structure of the squadmodiscs to be quite different from that in the genus description. Lamellae form a skeletal framework for the sucker-like squamodisc. The seven posterior band-shaped lamellae overlap each other, with their open ends facing outward forming a cavity within the disc with an opening to the exterior. The anterior three lamellae are in the form of complete concentrically arranged circular bands that telescope anteriorly at an angle into the body. In the original description, there was no mention of the sucker-like morphology, and all the lamellae were described as being complete concentric rings that telescoped into each other. Therefore, the genus is redescribed to reflect the morphology of the worms more accurately. In addition, Lamellodiscus japonicus has squamodiscs more similar to those of Calydiscoides than to Lamellodiscus; hence, it has been combined with Calydiscoides. The shape of the male copulatory apparatus, medial transverse bar and other characters differentiate C. nemipteris from its congeners.

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