scholarly journals Proceraea exoryxaesp. nov. (Annelida, Syllidae, Autolytinae), the first known polychaete miner tunneling into the tunic of an ascidian

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3374 ◽  
Author(s):  
Daniel Martin ◽  
Arne Nygren ◽  
Edwin Cruz-Rivera
Keyword(s):  
Red Sea ◽  
Outer Ring ◽  
Tropical Ecosystems ◽  
Male And Female ◽  
Fringing Reef ◽  
Polychaetous Annelid

While studying organisms living in association with the solitary tunicatePhallusia nigra(Ascidiacea, Ascidiidae) from a shallow fringing reef at Zeytouna Beach (Egyptian Red Sea), one of the collected ascidians showed peculiar perforations on its tunic. Once dissected, the perforations revealed to be the openings of a network of galleries excavated in the inner tunic (atrium) by at least six individuals of a polychaetous annelid. The worms belonged to the Autolytinae (Syllidae), a subfamily that is well known to include specialized predators and/or symbionts, mostly associated with cnidarians. The Red Sea worms are here described asProceraea exoryxaesp. nov., which are anatomically distinguished by the combination of simple chaetae only in anterior chaetigers, and a unique trepan with 33 teeth in one outer ring where one large tooth alternates with one medium-sized tricuspid tooth, and one inner ring with small teeth located just behind the large teeth. Male and female epitokes were found together with atokous individuals within galleries.Proceraea exoryxaesp. nov. constitutes the first known miner in the Autolytinae and the second species in this taxon known to live symbiotically with ascidians. The implications of finding this specialized parasite are discussed considering thatPhallusia nigrahas been introduced worldwide, in tropical and sub-tropical ecosystems, where it has the potential of becoming invasive.

scholarly journals Proteomic Changes between Male and Female Worms of the Polychaetous Annelid Neanthes arenaceodentata before and after Spawning

PLoS ONE ◽  
2013 ◽  
Vol 8 (8) ◽  
pp. e72990 ◽  
Author(s):  
Kondethimmanahalli H. Chandramouli ◽  
Timothy Ravasi ◽  
Donald Reish ◽  
Pei-Yuan Qian
Keyword(s):  
Male And Female ◽  
Before And After ◽  
Polychaetous Annelid

Benthic community composition affects O2 availability and variability in a Northern Red Sea fringing reef

Hydrobiologia ◽  
2010 ◽  
Vol 644 (1) ◽  
pp. 401-405 ◽  
Author(s):  
Wolfgang Niggl ◽  
Andreas F. Haas ◽  
Christian Wild
Keyword(s):  
Community Composition ◽  
Red Sea ◽  
Benthic Community ◽  
Fringing Reef ◽  
Northern Red Sea

scholarly journals Coral sand O2 uptake and pelagic–benthic coupling in a subtropical fringing reef, Aqaba, Red Sea

2009 ◽  
Vol 6 ◽  
pp. 133-142 ◽  
Author(s):  
C Wild ◽  
MS Naumann ◽  
A Haas ◽  
U Struck ◽  
FW Mayer ◽  
...  
Keyword(s):  
Red Sea ◽  
O2 Uptake ◽  
Fringing Reef ◽  
Coral Sand ◽  
Benthic Coupling

Seasonal and life-phase related differences in growth in Scarus ferrugineus on a southern Red Sea fringing reef

2014 ◽  
Vol 84 (5) ◽  
pp. 1422-1438 ◽  
Author(s):  
Y. Afeworki ◽  
J. J. Videler ◽  
Y. H. Berhane ◽  
J. H. Bruggemann
Keyword(s):  
Red Sea ◽  
Fringing Reef ◽  
Life Phase

scholarly journals Coral diversity and similarity along Sudanese Red Sea Fringing reef.

2016 ◽  
Vol 4 (4) ◽  
pp. 720-727
Author(s):  
Moamer Eltayeb Ali ◽  
◽  
Elhag Abugabr Elhag ◽  
Keyword(s):  
Red Sea ◽  
Fringing Reef

Immune electron microscopy of haemocyanins from two southern african whelks

1978 ◽  
Vol 36 (2) ◽  
pp. 158-159
Author(s):  
Linda M. Stannard ◽  
Margaret Lennon
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Outer Ring ◽  
Immune Electron Microscopy ◽  
Intertidal Zones ◽  
Central Belt ◽  
Cape Peninsula ◽  
Circular Contour

Burnupena cincta and Fusus verruculatus are two whelks which inhabit the intertidal zones of the Cape Peninsula shore. Their respiratory pigments, or haemocyanins, are morphologically similar in structure (Figs. 1 and 2) and appear in the electron microscope as short cylindrical rods about 34 nm in diameter and 36 nm high. Viewed side-on the molecules show regular banding suggesting a structure composed of six equidistant rings of sub-units. Occasionally the particles have the appearance of possessing a central “belt” in the position of the 3rd and 4th rows of sub-units. End-on views of the haemocyanin molecules show a circular contour with a dense outer ring and a less dense inner ring in which 10 definite sub-units may frequently be distinguished. A number of molecules display an extra central inner component which appears either as a diffuse plug or as a discrete ring-shaped core ± 8 nm in diameter.

The Clinical, Roentgenological and Morphological Effects of an Acute Exposure of Phosgene on the Lungs of Dogs

1971 ◽  
Vol 29 ◽  
pp. 236-237
Author(s):  
R. F. Bils ◽  
W. F. Diller ◽  
F. Huth
Keyword(s):  
Latent Period ◽  
Chemical Industry ◽  
Toxic Substance ◽  
Lung Edema ◽  
X Rays ◽  
Beagle Dogs ◽  
Male And Female ◽  
Morphological Alterations ◽  
Before And After ◽  
Electron Microscopes

Phosgene still plays an important role as a toxic substance in the chemical industry. Thiess (1968) recently reported observations on numerous cases of phosgene poisoning. A serious difficulty in the clinical handling of phosgene poisoning cases is a relatively long latent period, up to 12 hours, with no obvious signs of severity. At about 12 hours heavy lung edema appears suddenly, however changes can be seen in routine X-rays taken after only a few hours' exposure (Diller et al., 1969). This study was undertaken to correlate these early changes seen by the roengenologist with morphological alterations in the lungs seen in the'light and electron microscopes.Forty-two adult male and female Beagle dogs were selected for these exposure experiments. Treated animals were exposed to 94.5-107-5 ppm phosgene for 10 min. in a 15 m3 chamber. Roentgenograms were made of the thorax of each animal before and after exposure, up to 24 hrs.

Ultrastructural investigation of spontaneous pituitary gonadotroph cell adenomas in aging Sprague-Dawley rats

1983 ◽  
Vol 41 ◽  
pp. 702-703
Author(s):  
D. J. McComb ◽  
J. Beri ◽  
F. Zak ◽  
K. Kovacs
Keyword(s):  
Electron Microscopy ◽  
Animal Model ◽  
Epoxy Resin ◽  
Immunoelectron Microscopy ◽  
Tumor Type ◽  
Gonadal Function ◽  
Sprague Dawley ◽  
Male And Female ◽  
Reticulin Fibers ◽  
Sprague Dawley Rats

Gonadotroph cell adenomas of the pituitary are infrequent in human patients and are not invariably associated with altered gonadal function. To date, no animal model of this tumor type exists. Herein, we describe spontaneous gonadotroph cell adenomas in old male and female Sprague-Dawley rats by histology, immunocytology and electron microscopy.The material consisted of the pituitaries of 27 male and 38 female Sprague Dawley rats, all 26 months of age or older, removed at routine autopsy. Sections of formal in-fixed, paraffin-embedded tissue were stained with hematoxylin-phloxine-saffron (HPS), the PAS method and the Gordon-Sweet technique for the demonstration of reticulin fibers. For immunostaining, sections were exposed to anti-rat β-LH, anti-ratβ-TSH, anti-rat PRL, anti-rat GH and anti-rat ACTH 1-39. For electron microscopy, tissue was fixed in 2.5% glutaraldehyde, postfixed in 1% OsO4 and embedded in epoxy-resin. Tissue fixed in 10% formalin, embedded in epoxy resin without osmification, was used for immunoelectron microscopy.

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