La fraye d'une population d'éperlans géants, Osmerus eperlanus mordax, au lac Heney, Comté de Gatineau, Québec

1968 ◽  
Vol 25 (9) ◽  
pp. 1813-1830 ◽  
Author(s):  
Roméo-O. Legault ◽  
Claude Delisle
Keyword(s):  
Body Weight ◽  
Total Body Weight ◽  
The Body ◽  
Testis Weight ◽  
Spawning Period ◽  
Weight One ◽  
Total Body ◽  
Set Up ◽  
The Right ◽  
Two Populations

Two sympatric smelt populations inhabit Lake Heney, Gatineau County, Quebec. This study deals only with the population which we call "giant" but a brief discussion on "small smelt — large smelt" theory is included. The data were obtained from 1556 specimens collected with eight gillnets set up under the ice at one locality on Lake Heney, in February, March, and April 1967. The data permitted the determination of the time and site of spawning in the giant population. The time and site of spawning in the "dwarf" population was already known, and we found a marked difference in the spawning behavior and time of spawning of the two populations. The two populations are furthermore reproductively isolated. The sex ratio during the spawning period was closely followed and found to be similar to that of all other freshwater or marine smelts. A DeGiusti dredge, dragged along the bottom below the position of the gillnets immediately after the melting of the ice, permitted the collection of embryonic smelt eggs from a depth of 30–40 ft.The maturity index, relative fecundity, and intergonadal ratio were especially studied. Ovary weight at maturity represents in average one-quarter the total body weight, and testis weight one-fortieth the body weight. A 213-mm female lays an average of 42,460 eggs. The right ovary is 4.5 times smaller than the left one, and the right testis is on the average 3.8 times smaller than the left one.There is a direct relationship between total fecundity and length of mature females. This relation is expressed by the curve log E = 4.54 log L + k.

Ion and Water Balance in the Ixodid Tick Dermacentor Andersoni

1973 ◽  
Vol 58 (2) ◽  
pp. 523-536
Author(s):  
W. R. KAUFMAN ◽  
J. E. PHILLIPS
Keyword(s):  
Body Weight ◽  
Extracellular Fluid ◽  
Total Body Weight ◽  
Ixodid Tick ◽  
The Body ◽  
Dermacentor Andersoni ◽  
Adult Feeding ◽  
Feeding Cycle ◽  
Total Body ◽  
Sodium And Potassium

1. Of the total meal imbibed by female Dermacentor andersoni during the normal adult feeding cycle, about 80% is excreted. Of the total water excreted by the tick, 75% is removed by salivation, less than 3% is evaporated from the integument and spiracles, and the remainder is lost via the anus. 2. Of the total excreted sodium and potassium, 4 and 82% respectively are lost via the anus. The remainder in each case is presumed excreted via the salivary glands. 3. The ionic and osmotic concentrations of the haemolymph and saliva stabilize at constant values by the third or fourth day of feeding. The volume of extracellular fluid is constantly maintained at 23% of the body weight, even though the total body weight increases 75 times over the unfed weight, and the volume of excreted fluid passing through the haemolymph is about ten times the haemolymph volume at repletion.

scholarly journals Hormonal Control of Sexual Maturity in Octopus

1959 ◽  
Vol 36 (1) ◽  
pp. 1-33 ◽  
Author(s):  
M. J. WELLS ◽  
J. WELLS
Keyword(s):  
Body Weight ◽  
Optic Nerve ◽  
Sexual Maturity ◽  
Basal Area ◽  
Total Body Weight ◽  
Hormonal Control ◽  
The Body ◽  
Nerve Section ◽  
Normal Manner ◽  
Total Body

1. Gonad and body weight records have been collected for 487 individual octopuses over a period of 3 years. 2. In the size range used for experiments (200-1000 g.), the ovary is always immature in control animals, and constitutes only about 1/500th of the total body weight. The testis is rather larger, generally ripe, and forms about 1/100th of the body weight, increasing somewhat relative to the size of the body over the range considered. 3. Following optic nerve section, or removal of certain parts of the supraoesophageal lobes, the gonads enlarge. In females the ovary enlarges from 1/500th to as much as 1/5th of the total body weight within 5 weeks of operation and this may be followed by laying of fertile eggs that are brooded in a normal manner. In males where the testis is generally mature before operation the enlargement produced is only of the order of 50%. 4. Enlargement of testis or ovary is always accompanied by enlargement of one or both of the optic glands, and operational treatments that normally cause enlargement of the gonad are ineffective if the optic glands are first removed. 5. The optic glands are innervated from the subpedunculate/dorsal basal area in the hind part of the supraoesophageal brain mass. Lesions in this area, or severance of the nerve tracts running along the sides of the brain from it to the optic glands, cause these and the gonads to enlarge. 6. Unilateral central lesions or optic nerve section cause optic gland enlargement on the operated side only, but appear to be as effective in determining gonad enlargement as bilateral treatments. 7. It is concluded that maturation of the gonad is determined by secretion from the optic glands which is normally held in check by an inhibitory nerve supply from the subpedunculate/dorsal basal lobe area. The action of this region is in turn dependent upon the integrity of the optic nerves and thus, presumably, upon light. 8. This system in cephalopods is compared with analogous systems regulating sexual maturity in arthropods and vertebrates.

scholarly journals The Effect of Feeding with Resveratrol on Myogenin and mTOR Levels in Mice

2020 ◽  
pp. 1-6
Author(s):  
Serap Andaç Öztürk ◽  
Gül Kızıltan ◽  
Erkan Yurtçu ◽  
Didem Bacanlı ◽  
Yeşim Korkmaz Kasap ◽  
...  
Keyword(s):  
Body Weight ◽  
Muscle Mass ◽  
Muscle Hypertrophy ◽  
Total Body Weight ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
Time Interval ◽  
Study Group ◽  
Total Body ◽  
The Right

Aim: It is reported that resveratrol may induce muscle hypertrophy and myogenesis. Accordingly, resveratrol is promising for the treatment of muscle diseases and ergogenic aid for athletes. In this study it is aimed to observe the effects of resveratrol on myogenin and mTOR levels and muscle mass. Material and Methods: The study is performed on 14 Swiss albino young adult mice at Başkent University Experimental Animal Research Center. The mice are divided randomly into study (n:7) and control (n:7) groups. During consecutive 7 days, 20 mg/kg trans-resveratrol was given to the study group intraperitoneally. After the seventh day administration, the right gastrocnemius muscles are disected, weighted and stored at -80 °C for mTOR and myogenin analysis. Then, myogenin and mTOR levels are determined by enzyme-linked immunosorbent assay (ELISA) method in homogenised muscle mass. Results: According to mean myogenin and mTOR levels, there was no significantly difference between groups (p>0.05). Total body weight and the right gastrocnemius muscle weight of the study group (22.11±3.22 g, 0.09±0.03 g, respectively) at the 7th day was found significantly lower than control group (28.63±3.80 g, 0.12±0.02 g, respectively) (p<0.05). Conclusion: It was observed that resveratrol administration had no effect on myogenin and mTOR levels which is a fore-step for muscle hypertrophy. On the other hand, interestingly total body weight and muscle mass decrease was observed in the study group. The effects of resveratrol on muscle tissue is a relatively less studied topic. However, the authors are suggesting more studies on the resveratrol usage or administration for the effective dose and time interval investigation.

Effects of some probiotics during its use as a growth promoter in calves

2019 ◽  
Vol 20 (1) ◽  
pp. 62-66
Author(s):  
Magdy Amer
Keyword(s):  
Body Weight ◽  
Body Weight Gain ◽  
Total Body Weight ◽  
Treated Group ◽  
The Body ◽  
Control Group ◽  
Mean Corpuscular Hemoglobin ◽  
Growth Promoter ◽  
Probiotic Strains ◽  
Total Body

This study was performed on to evaluate the effect of some probiotic strains (Pediococcus acidophilus and Pedicoccus pentosaceus) on performance, blood picture and some biochemical parameters in serum of treated calves (10 weaned calves 90-115 kg). Calves were classified into 2 equal groups (each of 5 calves). The 1st group was served as the control group while the second group was given Maxboost® (20gm/head/day) in drinking water (after fermentation for 2-3 hours) for five months. Calves were weighed monthly to calculate the body weight gain till the end of the experiment whole blood weight and serum were collected from both groups at 1st, 2nd, 3rd, 4th and 5th month. Results revealed a significant increase in total body weight, body gain, total erythrocytes count, hemoglobin content, total leucocytes count, total protein and mean corpuscular hemoglobin. On the other hand, there were a significant decrease in serum aspartate transaminase (AST), serum alanine transaminase (ALT) and urea in pediococcus treated group compared to the control one.

scholarly journals Effects of Chronic Use of Methylphenidate on Spermatogenesis and Sexual Hormones in Adult Male Rats

2020 ◽  
Vol 12 (2) ◽  
Author(s):  
Alireza Akhavan Rezayat ◽  
Amir Abbas Asadpour ◽  
Samaneh Boroumand Noughabi ◽  
Hassan Ahmadnia ◽  
Hamid Mohseni ◽  
...  
Keyword(s):  
Body Weight ◽  
Sperm Count ◽  
Total Body Weight ◽  
Male Rats ◽  
Control Group ◽  
Testis Weight ◽  
Control Groups ◽  
Major Health Problem ◽  
Total Body ◽  
And Control

Background: The growing prevalence of Attention Deficit Hyperactivity Disorder (ADHD) and the non-medical use of Methylphenidate (MPH) among the youth have lead male infertility to be a major health problem. Objectives: The present study was conducted to investigate the impacts of MPH administration on different aspects of productivity, including total body weight, testis weight, spermatogenesis, sperm motility, histopathology changes, and sex hormone serum levels in male rats. Methods: This study was performed with 54 eight-week-old male rats divided into one control and two experimental groups. The experimental groups were gavaged with 2 and 10 mg/kg methylphenidate daily while the control group was gavaged with normal saline (at the same dosage). After 60 days, rats were subjected to blood sampling and bilateral orchidoepididymectomy under anesthesia. Spermogram, histological, and hormonal evaluations were performed on the samples. Testes weight and total body weight were also recorded. Results: The results revealed significant differences between the MPH and experimental groups in terms of hormonal, spermographic, and histopathologic features, as well as weight. Luteinizing hormone and testosterone levels, sperm count and motility, Leydig cell hyperplasia, spermatogenesis, congestion and necrosis levels, total body weight, and testis weight were significantly different between the experimental and control groups. However, no difference was observed between the experimental and control groups concerning follicle-stimulating hormone, maturation arrest, and edema levels. Conclusions: Based on the findings, MPH exposure exerts a significant effect on the testis and total body weight, as well as hormonal, spermatographic, and histopathologic characteristics. Accordingly, the present study provided an insight into the negative impression of MPH on sexual parameters.

Rate of gonad development in the ascidian Pyura praeputialis (Heller)

1972 ◽  
Vol 23 (1) ◽  
pp. 49 ◽  
Author(s):  
CK Goddard
Keyword(s):  
Body Weight ◽  
Gonad Development ◽  
Total Body Weight ◽  
Gonad Weight ◽  
Visceral Mass ◽  
Gonad Size ◽  
Intertidal Population ◽  
Total Body ◽  
Favourable Environment ◽  
Two Populations

Morphometric studies have been carried out on Pyura praeputialis. The relationships investigated were: (a) weight of the visceral mass v, total body weight, (b) total gonad weight v. weight of the visceral mass, (c) weight of right gonad v. total gonad weight, and (d) weight of right gonad v. weight of visceral mass. There is evidence that spawning results in a significant decrease in gonad size and that there are two spawning seasons per year (spring and autumn), but evidence on the latter point is not conclusive. It is shown that, within each of the populations studied, gonad weight bears a rectilinear relationship to body weight. It is also shown that the rate of gonad development is significantly lower in the littoral (i.e. intertidal) population than in the sublittoral (i.e. permanently immersed) population. The different rates of gonad development in the two populations are taken to indicate that the littoral is a less favourable environment, for this species, than the sublittoral. The implications of this finding are discussed.

scholarly journals REPRODUCTIVE BIOLOGY OF THE MULLET LIZA FALCIPINNIS (VALENCIENNES, 1836) IN TWO AFRICAN COMPLEXS LAGOONS (EBRIÉ AND GRAND-LAHOU) (CÔTE D’IVOIRE)

2018 ◽  
Vol 6 (5) ◽  
pp. 114-127
Author(s):  
Ebram Luc Gervais ◽  
Soumaïla SYLLA ◽  
Tizié Thierry ZAN-BI ◽  
Boua Célestin ATSE
Keyword(s):  
Body Weight ◽  
Sex Ratio ◽  
Condition Factor ◽  
Gonadosomatic Index ◽  
Fork Length ◽  
Total Body Weight ◽  
Hepatosomatic Index ◽  
Spawning Period ◽  
Total Body ◽  
Monthly Variations

The reproduction of Liza falcipinnis were investigated in both lagoons (Ebrié and Grand-Lahou) from January 2006 to december 2007. 2162 specimens were examined (914 and 1248 respectively in Ebrié and Grand-Lahou lagoons). Fork length was taken to the nearest 1 mm, and total body weight (TW) and eviscerated body weight (EW) to the nearest 0.1 g. The gonads and the liver were then established removed, weighted to the nearest 0.001g. The reproduced period of Liza falcipinnis was established by analysing the temporal evolution of the frequency of the maturity stages and the monthly variations in the gonadosomatic index (GSI), the hepatosomatic index (HIS) and the condition factor (K). Sex ratio was established taking into account the sex determinations. The size at which 50 % of the specimens became mature (FL50) was estimated. The sex ratio (1:1.24) and (1:1.40) observed respectively in Ebrié and Grand-Lahou lagoons were in favour of females. The first sexual maturity size was 21.0 cm (FL) for males and 27.9 cm (FL) for females in Ebrié lagoon and 24.7 cm (FL) for males and 27.9 cm (FL) for females in Grand-Lahou lagoon. Liza falcipinnis spawns in lagoon and the spawning period ranged from December to April.

scholarly journals STUDI JUMLAH TROMBOSIT ANTARA PENDONOR LAKI-LAKI DAN PEREMPUAN PADA USIA YANG BERBEDA DI UNIT TRANSFUSI DARAH CABANG KOTA MALANG

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Anis Nur Khasanah ◽  
Suyadi Suyadi
Keyword(s):  
Body Weight ◽  
Blood Transfusion ◽  
Blood Cell ◽  
Blood Sample ◽  
Blood Coagulation ◽  
Total Body Weight ◽  
The Body ◽  
Result Show ◽  
Total Body ◽  
Blood Cell And Plasma

<p>Blood is part of the body which has 6-8 % of total body weight which include of the blood cell and plasma. Thrombocyte is one of component in the blood which has an important function in blood coagulation. This study is aimed to evaluate the influence of the sex and age of donor on the number of thrombocyte. Blood sample were collected at Blood Transfusion Unit of Malang. This research using cases study whose use to observe the number of thrombocyte in man and woman donor at different age. Total of 40 sample (20 of each sex) whose classified as ≤31, 31-40, 41-50 and ≥ 51 years of age. The number of thrombocyte which determined by hemocytometer   and observe  under microscope   (magnification:   100 ).  The collected data where analyze by unpaired T-test for man and woman one. While Anova whose use to analyze the differences between ages interval both in the man and woman.  Duncan test (5%) whose  use  to  determine  the  significant different between ages group. The  result  show  that  the  number  of  thrombocyte  whose  significantly higher (P&lt;0,05) than those in the woman (245.750 <span style="text-decoration: underline;">+</span> 76300 vs 201.750 <span style="text-decoration: underline;">+</span> 61564). The age of donor whose significantly influence on the number of thrombocyte (P&lt;0,05) both in the man and woman. The number of thrombocyte degrees significantly by increasing the age. However for the both sex can donor the blood of more than 51 years of age.</p>

Fecundity of Atlantic Salmon (Salmo salar) from Two Maine Rivers

1971 ◽  
Vol 28 (5) ◽  
pp. 764-767 ◽  
Author(s):  
E. T. Baum ◽  
A. L. Meister
Keyword(s):  
Body Weight ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Total Body Weight ◽  
Body Cavity ◽  
The Body ◽  
Fish Length ◽  
Atlantic Salmon Salmo Salar ◽  
Significant Difference ◽  
Total Body

Estimates of numbers of eggs in 164 hatchery-spawned Atlantic salmon (Salmo salar) from two Maine rivers ranged from 3528 to 18,847, and egg number per pound of total body weight from 523 to 1385. Sample autopsies of 10 salmon revealed that artificial spawning removed an average of more than 97% of the eggs in the body cavity. There was no significant difference between von Bayer and displacement estimates of fecundity. Valid estimates of the potential egg deposition of Atlantic salmon runs in the two Maine rivers studied can be made using routinely collected trapping data and the regression formulae based on fish length resulting from this study. Salmon that spent 2 years at sea before spawning contained lower total numbers of eggs but appeared to have a higher rate of fecundity than older fish. Factors governing egg size could not be isolated. Loss in body weight during spawning is discussed.

scholarly journals Lean body weight versus total body weight to calculate the iodinated contrast media volume in abdominal CT: a randomised controlled trial

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Moreno Zanardo ◽  
Fabio Martino Doniselli ◽  
Anastassia Esseridou ◽  
Massimiliano Agrò ◽  
Nicol Antonina Rita Panarisi ◽  
...  
Keyword(s):  
Body Weight ◽  
Contrast Media ◽  
Controlled Trial ◽  
Total Body Weight ◽  
Lean Body Weight ◽  
Iodinated Contrast Media ◽  
Abdominal Ct ◽  
Iodinated Contrast ◽  
Significant Difference ◽  
Total Body

Abstract Objectives Iodinated contrast media (ICM) could be more appropriately dosed on patient lean body weight (LBW) than on total body weight (TBW). Methods After Ethics Committee approval, trial registration NCT03384979, patients aged ≥ 18 years scheduled for multiphasic abdominal CT were randomised for ICM dose to LBW group (0.63 gI/kg of LBW) or TBW group (0.44 gI/kg of TBW). Abdominal 64-row CT was performed using 120 kVp, 100–200 mAs, rotation time 0.5 s, pitch 1, Iopamidol (370 mgI/mL), and flow rate 3 mL/s. Levene, Mann–Whitney U, and χ2 tests were used. The primary endpoint was liver contrast enhancement (LCE). Results Of 335 enrolled patients, 17 were screening failures; 44 dropped out after randomisation; 274 patients were analysed (133 LBW group, 141 TBW group). The median age of LBW group (66 years) was slightly lower than that of TBW group (70 years). Although the median ICM-injected volume was comparable between groups, its variability was larger in the former (interquartile range 27 mL versus 21 mL, p = 0.01). The same was for unenhanced liver density (IQR 10 versus 7 HU) (p = 0.02). Median LCE was 40 (35–46) HU in the LBW group and 40 (35–44) HU in the TBW group, without significant difference for median (p = 0.41) and variability (p = 0.23). Suboptimal LCE (< 40 HU) was found in 64/133 (48%) patients in the LBW group and 69/141 (49%) in the TBW group, but no examination needed repeating. Conclusions The calculation of the ICM volume to be administered for abdominal CT based on the LBW does not imply a more consistent LCE.

Sign in / Sign up

Export Citation Format

Share Document