Lernanthropinus nematistii sp.nov. (Lernanthropidae) and Caligus tenuifurcatus Wilson, 1937 (Caligidae), siphonostomatoid copepod parasites of roosterfish (Nematistius pectoralis Gill, 1864) from the Sea of Cortez

1988 ◽  
Vol 66 (4) ◽  
pp. 866-874 ◽  
Author(s):  
Gregory B. Deets ◽  
George W. Benz
Keyword(s):  
Male And Female ◽  
Parasitic Copepods ◽  
Copepod Parasites ◽  
Sea Of Cortez ◽  
Exopod Segment

Two roosterfish, Nematistius pectoralis Gill, 1864, from the southern Sea of Cortez were examined for parasitic copepods. The male and female of Lernanthropinus nematistii sp.nov. and Caligus tenuifurcatus Wilson, 1937 are described. Lernanthropinus nematistii sp.nov. is distinguished from its congeners by a bifid process near the tip of the brachium of the second maxilla. Caligus tenuifurcatus is distinguished from other species by the number and location of the flat, dentiform basal processes on the three most medial setae of the second exopod segment of leg 1.

Aspects of the biology of the parasitic copepods Lepeophtheirus salmonis and Caligus elongatus on farmed salmonids, and their treatment

1982 ◽  
Vol 81 (3) ◽  
pp. 185-197 ◽  
Author(s):  
R. Wootten ◽  
John W. Smith ◽  
E. A. Needham
Keyword(s):  
Generation Time ◽  
Wild Fish ◽  
Sea Lice ◽  
Lepeophtheirus Salmonis ◽  
Fish Tissues ◽  
Male And Female ◽  
Parasitic Copepods ◽  
Larval Stages ◽  
Great Damage ◽  
Lice Infestations

SynopsisThe general biology and pathology of Lepeophtheirus salmonis and Caligus elongatus and the prevention and treatment of such ‘sea-lice’ infestations on farmed salmonids are described from the literature and original observations. The life-cycle of L. salmonis and probably also that of C. elongatus comprises the egg and 10 stages separated by moults, namely, two nauplius, one infective copepodite, four chalimus, two pre-adult and the adult (male and female) stages. Water temperature greatly affects the rate of development, especially for early larval stages. Heavy infestations of wild fish seem rare, and lice are lost fairly rapidly in freshwater. In Scotland at least L. salmonis shows a succession of generations on farmed salmonids; generation time is about six weeks at 9–12 C. Post-chalimus stages of C. elongatus may exchange between farmed salmonids and wild fish (especially gadoids). Epizootics (particularly with L. salmonis) cause great damage to salmonids in Norwegian and Scottish farms largely through feeding on host skin. The dermis is oedematous and haemorrhaged where lice feed, and blood seeps between scales; deaths probably result from osmoregulatory failure. Whilst prevention of infestation is difficult, a bath treatment for 1 h with 1 ppm of the organophosphorus compound Dichlorvos is effective against post-chalimus stages of L. salmonis on caged salmonids. Side effects are minimal and clearance rates from fish tissues satisfactory, but treatment may be required every 3–4 weeks.

Copepod parasites of deep-sea fish off the Galápagos Islands

Parasitology ◽  
1975 ◽  
Vol 70 (3) ◽  
pp. 359-375 ◽  
Author(s):  
Ju-Shey Ho
Keyword(s):  
Deep Sea ◽  
Galapagos Islands ◽  
Galápagos Islands ◽  
Parasitic Copepods ◽  
Gill Filaments ◽  
Copepod Parasites ◽  
Sea Fish

Five species of parasitic copepods are described based on the material collected during cruise 16 of R/V Anton Bruun. They are: from the gill chambers of macrourids, Chondracanthodes deflexus Wilson, Lateracanthus quadripedis Kabata and Gusev and Brachiella annulata Markevitch; from the anal fin of a macrourid, Nudiclavella galapagoense gen.nov., sp.nov.; and from the gill filaments of brotulids, Naobranchia maxima sp.nov. All fishes were caught with FVSL (free vehicle set lines) in the deep sea off the Galápagos Islands, ranging from 1710 to 3330 m.

Copepod parasites of deep-sea benthic fishes from the western North Atlantic

Parasitology ◽  
1985 ◽  
Vol 90 (3) ◽  
pp. 485-497 ◽  
Author(s):  
Ju-Shey Ho
Keyword(s):  
New York ◽  
North Atlantic ◽  
Deep Sea ◽  
Grand Banks ◽  
Parasitic Copepods ◽  
New York Bight ◽  
York Bight ◽  
Antimora Rostrata ◽  
Benthic Fishes ◽  
Copepod Parasites

Nine species of parasitic copepods are reported, with 3 of them being new to science. They are: (1) Chondracanthodes deflexus Wilson from Antimora rostrata Günther, Coryphaenoides (Chalinura) brevibarbis (Goode and Bean), Coryphaenoides (Nematonurus) armatus (Hector), Coryphaenoides (Chalinura) leptolepis (Günther), and Coryphaenoides (Lionurus) carapinus (Goode and Bean); (2) Chondracanthodes radiatus (Müller) from Macrourus berglax Lacepede; (3) Lernaeopodina pectinata sp.nov. from Alepocephalus agassizi (Goode and Bean); (4) Neobrachiella pinguis (Wilson) from Antimora rostrata Günther; (5) Clavella adunca (Strøm) from Macrourus berglax Lacepede; (6) Sphyrion lumpi (Krøyer) from Antimora rostrata Günther; (7) Lophoura gracilis Wilson from Synaphobranchus kaupii Johnson; (8) Lophoura pentaloba sp.nov. from Coryphaenoides (Nematonurus) armatus (Hector) and Nezumia bairdii (Goode and Bean) and (9) Lophoura tetraphylla sp.nov. from Antimora rostrata Günther. The infected fishes were collected with trawls from depths of 828 to 4815 m in the New York Bight and 403 to 1294 m near the Grand Banks (south of Newfoundland).

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.

Quantitative ultrastructural reconstruction of small regions within large volumes by correlative light and high voltage electron microscopy of serial 0.25-0.50 μm sections

1987 ◽  
Vol 45 ◽  
pp. 578-581
Author(s):  
Conly L. Rieder ◽  
Frederick J. Miller ◽  
Edwin Davison ◽  
Samuel S. Bowser ◽  
Kirsten Lewis ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Mitotic Spindle ◽  
Meiotic Spindle ◽  
High Voltage Electron Microscopy ◽  
Male And Female ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
Differential Stability ◽  
Sperm Aster

In this abstract we Illustrate how same-section correlative light and high voltage electron microscopy (HVEM) of serial 0.25-0.50-μm sections can answer questions which are difficult to approach by EM of 60-100 nm sections.Starfish (Pisaster and Asterlas) eggs are fertilized at meiosis I when the oocyte contains two maternal centrosomes (e.g., asters) which form the poles of the first meiotic spindle. Immediately after fertilization a sperm aster is assembled in the vicinity of the male pronucleus and persists throughout meiosis. At syngamy the sperm aster splits to form the poles of the first mitotic spindle. During this time the functional and replicative properties of the maternal centrosome, inherited from the last meiotic division, are lost. The basis for this differential stability, of male and female centrosomes in the same cytoplasm, is a mystery.

A Tape Striation Counting Method for Determining Fundamental Frequency

1979 ◽  
Vol 10 (4) ◽  
pp. 246-248 ◽  
Author(s):  
Peter B. Mueller ◽  
Marla Adams ◽  
Jean Baehr-Rouse ◽  
Debbie Boos
Keyword(s):  
Fundamental Frequency ◽  
Counting Method ◽  
Male And Female ◽  
Fundamental Frequencies ◽  
Counting Procedure ◽  
Female Subjects

Mean fundamental frequencies of male and female subjects obtained with FLORIDA I and a tape striation counting procedure were compared. The fundamental frequencies obtained with these two methods were similar and it appears that the tape striation counting procedure is a viable, simple, and inexpensive alternative to more costly and complicated procedures and instrumentation.

Perceptual Evaluation of Speech Naturalness in Speakers of Varying Gender Identities

2020 ◽  
Vol 63 (7) ◽  
pp. 2054-2069
Author(s):  
Brandon Merritt ◽  
Tessa Bent
Keyword(s):  
Spontaneous Speech ◽  
Identification Accuracy ◽  
Rating Task ◽  
Gender Identification ◽  
Identification Task ◽  
Male And Female ◽  
Perceptual Evaluation ◽  
Speech Training ◽  
And Gender ◽  
Speech Naturalness

Purpose The purpose of this study was to investigate how speech naturalness relates to masculinity–femininity and gender identification (accuracy and reaction time) for cisgender male and female speakers as well as transmasculine and transfeminine speakers. Method Stimuli included spontaneous speech samples from 20 speakers who are transgender (10 transmasculine and 10 transfeminine) and 20 speakers who are cisgender (10 male and 10 female). Fifty-two listeners completed three tasks: a two-alternative forced-choice gender identification task, a speech naturalness rating task, and a masculinity/femininity rating task. Results Transfeminine and transmasculine speakers were rated as significantly less natural sounding than cisgender speakers. Speakers rated as less natural took longer to identify and were identified less accurately in the gender identification task; furthermore, they were rated as less prototypically masculine/feminine. Conclusions Perceptual speech naturalness for both transfeminine and transmasculine speakers is strongly associated with gender cues in spontaneous speech. Training to align a speaker's voice with their gender identity may concurrently improve perceptual speech naturalness. Supplemental Material https://doi.org/10.23641/asha.12543158

Erratum: Hearing Levels among Elderly Nursing Home Residents

1980 ◽  
Vol 45 (2) ◽  
Author(s):  
Ronald L. Schow ◽  
Michael A. Nerbonne
Keyword(s):  
Nursing Home ◽  
Nursing Home Residents ◽  
Male And Female

In the February 1980 issue of this journal, the report by Ronald L. Schow and Michael A. Nerbonne ("Hearing Levels Among Elderly Nursing Home Residents") contains an error. On page 128, the labels "Male" and "Female" in Table 2 should be reversed.

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