Parental behavior of intertidal fishes of the stichaeid genus Xiphister

1977 ◽  
Vol 55 (1) ◽  
pp. 60-63 ◽  
Author(s):  
Jeffrey B. Marliave ◽  
Edward E. DeMartini
Keyword(s):  
Adult Male ◽  
Parental Behavior ◽  
Egg Masses ◽  
Xiphister Atropurpureus ◽  
Gravid Females ◽  
Intertidal Fishes

Egg masses of Xiphister atropurpureus (Kittlitz) and X. mucosus (Girard) are tended by a single adult male wrapped closely around the mass. Males tend up to three egg masses at once. It is suggested that males only tend egg masses that they have fertilized. Comparison of egg numbers in spawned masses and in ovaries of gravid females, together with the observation of complete egg extrusion by spent females, demonstrates that each mass comprises the entire annual egg output of a female. Therefore, during a season a male may repeatedly spawn with different females.

Efficacy of ivermectin against Syphacia obvelata (Nematoda) in mice

1985 ◽  
Vol 59 (3) ◽  
pp. 257-261 ◽  
Author(s):  
D. A. Ostlind ◽  
M. A. Nartowicz ◽  
W. G. Mickle
Keyword(s):  
Oral Dose ◽  
Adult Male ◽  
Syphacia Obvelata ◽  
Gravid Females ◽  
Diet Level

ABSTRACTIvermectin was evaluated against natural and artificial pinworm (Syphacia) infections in mice. Ivermectin given in the diet for 6 days at 0·0005% was 99% effective against both immature and adult worms. A diet level of 0·0004% reduced immature and mature pinworm by 99 and 75%, respectively but 0·0001% was inactive. One oral dose of 2·0mg/kg was 100 and 97% effective against gravid females and immature worms, respectively. A dose of 1·0 mg/kg was 96 and 66% effective against the same parasitic stages. A similar effect was observed against adult male worms where 94 and 86% were removed by one oral dose of ivermectin at 2·0 and 1·0 mg/kg, respectively.

Parental Behavior of Adult Male Japanese Monkeys

Behaviour ◽  
1970 ◽  
Vol 36 (4) ◽  
pp. 270-285 ◽  
Author(s):  
B.K. Alexander
Keyword(s):  
Adult Male ◽  
Parental Behavior ◽  
Japanese Monkeys

Alteration of Mitochondria in Oxythiamine-Induced, Acute Thiamine Deficiency in the Mouse

1976 ◽  
Vol 34 ◽  
pp. 284-285
Author(s):  
Itaru Watanabe ◽  
Dante G. Scarpelli
Keyword(s):  
Electron Microscopy ◽  
Adult Male ◽  
Thiamine Deficiency ◽  
Light And Electron Microscopy ◽  
Fatty Change ◽  
Deficient Diet ◽  
Subcutaneous Injections ◽  
Swiss Mice ◽  
Time Period ◽  
Ad Libitum

Acute thiamine deficiency was produced in mice by the administration of oxythiamine, a thiamine analogue, superimposed upon a thiamine deficient diet. Adult male Swiss mice (30 gm. B.W.) were fed with a thiamine deficient diet ad libitumand were injected with oxythiamine (170 mg/Kg B.W.) subcutaneously on days 4 and 10. On day 11, severe lassitude and anorexia developed, followed by death within 48 hours. The animals treated daily with subcutaneous injections of thiamine (300 μg/Kg B.W.) from day 11 through 15 were kept alive. Similarly, feeding with a diet containing thiamine (600 μg/Kg B.W./day) from day 9 through 17 reversed the condition. During this time period, no fatal illness occurred in the controls which were pair-fed with a thiamine deficient diet.The oxythiamine-treated mice showed a significant enlargement of the liver, which weighed approximately 1.5 times as much as that of the pair-fed controls. By light and electron microscopy, the hepatocytes were markedly swollen due to severe fatty change and swelling of the mitochondria.

Scanning electron microscopy of the integument of schistosoma rodhaini

1986 ◽  
Vol 44 ◽  
pp. 132-133
Author(s):  
P. Evers ◽  
C. Schutte ◽  
C. D. Dettman
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Oral Sucker ◽  
Adult Male ◽  
Dorsal Surface ◽  
Ventral Surface ◽  
Sensory Receptors ◽  
East African ◽  
Dorsal Midline ◽  
Scanning Electron

S.rodhaini (Brumpt 1931) is a parasite of East African rodents which may possibly hybridize with the human schistosome S. mansoni. The adult male at maturity measures approximately 3mm long and possesses both oral and ventral suckers and a marked gynaecophoric canal. The oral sucker is surrounded by a ring of sensory receptors with a large number of inwardly-pointing spines set into deep sockets occupying the bulk of the ventral surface of the sucker. Numbers of scattered sensory receptors are found on both dorsal and ventral surfaces of the head (Fig. 1) together with two conspicuous rows of receptors situated symmetrically on each side of the midline. One row extends along the dorsal surface of the head midway between the dorsal midline and the lateral margin.

An Ultrastructural Comparison of Hepatocytes from ADH+ and ADH−Peromyscus Maniculatus

1996 ◽  
Vol 54 ◽  
pp. 30-31
Author(s):  
J. T. Ellzey ◽  
D. Borunda ◽  
B. P. Stewart
Keyword(s):  
South Carolina ◽  
Adult Male ◽  
Uranyl Acetate ◽  
Model System ◽  
Deer Mice ◽  
En Bloc ◽  
Genetic Stock ◽  
Hepes Buffer ◽  
Transmission Electron ◽  
Color Scanner

Genetically alcohol deficient deer mice (ADHN/ADHN) (obtained from the Peromyscus Genetic Stock Center, Univ. of South Carolina) lack hepatic cytosolic alcohol dehydrogenase. In order to determine if these deer mice would provide a model system for an ultrastructural study of the effects of ethanol on hepatocyte organelles, 75 micrographs of ADH+ adult male deer mice (n=5) were compared with 75 micrographs of ADH− adult male deer mice (n=5). A morphometric analysis of mitochondrial and peroxisomal parameters was undertaken.The livers were perfused with 0.1M HEPES buffer followed by 0.25% glutaraldehyde and 2% sucrose in 0.1M HEPES buffer (4C), removed, weighed and fixed by immersion in 2.5% glutaraldehyde in 0.1M HEPES buffer, pH 7.4, followed by a 3,3’ diaminobenzidine (DAB) incubation, postfixation with 2% OsO4, en bloc staining with 1% uranyl acetate in 0.025M maleate-NaOH buffer, dehydrated, embedded in Poly/Bed 812-BDMA epon resin, sectioned and poststained with uranyl acetate and lead citrate. Photographs were taken on a Zeiss EM-10 transmission electron microscope, scanned with a Howtek personal color scanner, analyzed with OPTIMAS 4.02 software on a Gateway2000 4DX2-66V personal computer and stored in Excel 4.0.

Preliminary research of the aldosterone synthesized by bone morrow stem cells of adult male ratsin vitro

2010 ◽  
Vol 34 (8) ◽  
pp. S43-S43
Author(s):  
Wei‑ying Zou ◽  
Bei Yang ◽  
Xiuli Ni ◽  
Da‑lei Zhang ◽  
Lei Wu ◽  
...  
Keyword(s):  
Stem Cells ◽  
Adult Male ◽  
Preliminary Research ◽  
Bone Morrow

Observer Agreement on Disfluency and Stuttering

1981 ◽  
Vol 24 (4) ◽  
pp. 595-600 ◽  
Author(s):  
Richard F. Curlee
Keyword(s):  
Graduate Student ◽  
Adult Male ◽  
Observer Agreement

Groups of undergraduate and graduate stndent listeners identified the stutterings and disfluencies of eight adult male stutterers during videotaped samples of their reading and speaking. Stuttering and disfluency loci were assigned to words or to intervals between words. The data indicated that stuttering and disfluency are not two reliable and unambiguous response classes and are not usually assigned to different, nonoverlapping behaviors. Furthermore, judgments of stuttering and disfluency were distributed similarly across words and intervals. For both undergraduate and graduate student listeners, there was relatively low unit-by-unit agreement among listeners and within the same listeners from one judgment session to another.

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