Variation with Fish Length, Sex, Stage of Sexual Maturity, and Season in the Appearance and Volume of the Drumming Muscles of the Swim-Bladder in the Haddock, Melanogrammus aeglefinus (L.)

1958 ◽  
Vol 15 (3) ◽  
pp. 355-390 ◽  
Author(s):  
Wilfred Templeman ◽  
V. M. Hodder
Keyword(s):  
Sexual Maturity ◽  
Low Frequency ◽  
Mature Male ◽  
Melanogrammus Aeglefinus ◽  
Fish Length ◽  
Swim Bladder ◽  
Secondary Importance ◽  
Spawning Period ◽  
Male And Female ◽  
The Difference

Observations made as early as 1947 and data collected in 1953 to 1954 and 1956 to 1957 indicate that there is considerable variation in the size and appearance of the drumming muscles of the swim-bladder of haddock with fish length, sex, sexual maturity, and season on the Grand Bank and St. Pierre Bank. For haddock of the same length the data indicate that the drumming muscles of mature male haddock are larger than those of immature males and also of immature and mature females of the same length. In addition the data indicate that a periodicity is exhibited in the size of the muscles of the mature male, the muscles being nearly twice as large during the pre-spawning and spawning period in May and June as they are in October and November. This phenomenon does not occur in female haddock, the drumming muscles of which are considerably smaller than those of male fish of the same size and show no variation in size with the season.It is suggested that the difference in size of the drumming muscles of male and female haddock can serve as a means of determining the sex of haddock landed in the gutted condition by commercial trawlers, at least for the mature fish which make up the bulk of the commercial trawlers' catches. There is some difference between male and female haddock in the colour of drumming muscles, but this seems to be of secondary importance for distinguishing between the sexes.Male haddock probably use the drumming muscles chiefly to produce low-frequency swim-bladder sounds which serve as rallying calls for female and other male haddock to join in spawning activities.

Reproductive biology of the freshwater catfish, Tandanus tandanus Mitchell, in the Gwydir River, Australia. II. Gonadal cycle and fecundity

1977 ◽  
Vol 28 (2) ◽  
pp. 159 ◽  
Author(s):  
TLO Davis
Keyword(s):  
Reproductive Biology ◽  
Egg Size ◽  
Fish Length ◽  
Gonad Weight ◽  
Spawning Period ◽  
Male And Female ◽  
Freshwater Catfish ◽  
Lower Weight ◽  
Fish Weight ◽  
Egg Diameter

All male and female T. tandanus in the Gwydir River were mature at age V and at a weight of 1200 g, although some females matured at an earlier age and lower weight than males. The seasonal gonadal cycle as indicated by gonad weight, egg size and maturity stages revealed that the spawning period in the Gwydir River extended from January to the beginning of March. Egg diameter increased linearly with fish length and weight. Ripe eggs ranged from 2.28 to 3.05 mm while fish weight ranged from 675 to 2275 g. Fecundity increased linearly with fish weight and exponentially with fish length. Egg numbers per female ranged from 2000 to 20 600 eggs while fish weight ranged from 675 to 2275 g. Egg size also increased with increasing fecundity. Temperature in excess of 24�C appeared to be the primary factor stimulating spawning. Flooding was not required as a stimulus for spawning.

Perceived social support and burden of care of male and female caregivers of patient with schizophrenia

2017 ◽  
Vol 8 (1) ◽  
pp. 10
Author(s):  
Narendra Kumar Singh ◽  
Nishant Goyal
Keyword(s):  
Social Support ◽  
Perceived Social Support ◽  
Family Members ◽  
Well Being ◽  
Cross Sectional Study ◽  
Burden Of Care ◽  
Cross Sectional ◽  
Male And Female ◽  
The Social ◽  
The Difference

Background: Schizophrenia is associated with a high familial, social and economic burden. Schizophrenia is also associated with a high level of disability which may create impediments on the social and economic areas of the patients as well as on their respective family networks. Families with schizophrenia may encounter problems such as impairment of health and well being of other family members, restriction of social activities of the family members and shrinking of support from the social network. Aims: The present study examined the difference in perceived social support and burden of care between the male and female caregivers of patients with schizophrenia. Methods: This was a cross-sectional study examining the difference in perceived social support and burden of care between the male and female caregivers of patients with schizophrenia. The sample consisted of 60 (30 male and 30 female) caregivers of the patients with the diagnosis of schizophrenia as per ICD-10-DCR. Results and Conclusion: This study revealed that male caregivers perceived more social support and less burden of care as compared to female caregivers. Key words: Gender, social support, burden

scholarly journals Possibility of Human Gender Recognition Using Raman Spectra of Teeth

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3983
Author(s):  
Ozren Gamulin ◽  
Marko Škrabić ◽  
Kristina Serec ◽  
Matej Par ◽  
Marija Baković ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Principal Component ◽  
Support Vector ◽  
Gender Recognition ◽  
Proof Of Concept ◽  
Male And Female ◽  
Tooth Type ◽  
Tooth Apex ◽  
The Difference

Gender determination of the human remains can be very challenging, especially in the case of incomplete ones. Herein, we report a proof-of-concept experiment where the possibility of gender recognition using Raman spectroscopy of teeth is investigated. Raman spectra were recorded from male and female molars and premolars on two distinct sites, tooth apex and anatomical neck. Recorded spectra were sorted into suitable datasets and initially analyzed with principal component analysis, which showed a distinction between spectra of male and female teeth. Then, reduced datasets with scores of the first 20 principal components were formed and two classification algorithms, support vector machine and artificial neural networks, were applied to form classification models for gender recognition. The obtained results showed that gender recognition with Raman spectra of teeth is possible but strongly depends both on the tooth type and spectrum recording site. The difference in classification accuracy between different tooth types and recording sites are discussed in terms of the molecular structure difference caused by the influence of masticatory loading or gender-dependent life events.

scholarly journals Analysis of Low-Frequency Mutations Associated with Drug Resistance to Raltegravir before Antiretroviral Treatment

2010 ◽  
Vol 55 (3) ◽  
pp. 1114-1119 ◽  
Author(s):  
Jia Liu ◽  
Michael D. Miller ◽  
Robert M. Danovich ◽  
Nathan Vandergrift ◽  
Fangping Cai ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Treatment Failure ◽  
Low Frequency ◽  
Hiv Treatment ◽  
Viral Population ◽  
Virologic Suppression ◽  
Resistance Mutations ◽  
The Difference ◽  
Allele Specific Sequencing ◽  
Hiv 1

ABSTRACTRaltegravir is highly efficacious in the treatment of HIV-1 infection. The prevalence and impact on virologic outcome of low-frequency resistant mutations among HIV-1-infected patients not previously treated with raltegravir have not been fully established. Samples from HIV treatment-experienced patients entering a clinical trial of raltegravir treatment were analyzed using a parallel allele-specific sequencing (PASS) assay that assessed six primary and six secondary integrase mutations. Patients who achieved and sustained virologic suppression (success patients,n= 36) and those who experienced virologic rebound (failure patients,n= 35) were compared. Patients who experienced treatment failure had twice as many raltegravir-associated resistance mutations prior to initiating treatment as those who achieved sustained virologic success, but the difference was not statistically significant. The frequency of nearly all detected resistance mutations was less than 1% of viral population, and the frequencies of mutations between the success and failure groups were similar. Expansion of pre-existing mutations (one primary and five secondary) was observed in 16 treatment failure patients in whom minority resistant mutations were detected at baseline, suggesting that they might play a role in the development of drug resistance. Two or more mutations were found in 13 patients (18.3%), but multiple mutations were not present in any single viral genome by linkage analysis. Our study demonstrates that low-frequency primary RAL-resistant mutations were uncommon, while minority secondary RAL-resistant mutations were more frequently detected in patients naïve to raltegravir. Additional studies in larger populations are warranted to fully understand the clinical implications of these mutations.

scholarly journals Meteorological conditions over Antarctic blue-ice areas and their influence on the local surface mass balance

2001 ◽  
Vol 47 (156) ◽  
pp. 37-50 ◽  
Author(s):  
Richard Bintanja ◽  
Carleen H. Reijmer
Keyword(s):  
Mass Balance ◽  
Low Frequency ◽  
Meteorological Conditions ◽  
Surface Mass Balance ◽  
Surface Mass ◽  
Wind Speeds ◽  
Dry Conditions ◽  
The Difference ◽  
Sublimation Rates ◽  
Different Characteristics

AbstractThis paper addresses the causes of the prevailing meteorological conditions observed over an Antarctic blue-ice area and their effect on the surface mass balance. Over blue-ice areas, net accumulation is zero and ablation occurs mainly through sublimation. Sublimation rates are much higher than over adjacent snowfields. The meteorological conditions favourable for high sublimation rates (warm, dry and gusty) are due to the specific orographic setting of this blue-ice area, with usually a steep upwind mountainous slope causing strong adiabatic heating. Diabatic warming due to radiation, and entrainment of warm air from aloft into the boundary layer augment the warming. The prevailing warm, dry conditions explain roughly 50% of the difference in sublimation, and the different characteristics of blue ice (mainly its lower albedo) the other 50%. Most of the annual sublimation (∼70%) takes place during the short summer (mainly in daytime), with winter ablation being restricted to occasional warm, dry föhn-like events. The additional moisture is effectively removed by entrainment and horizontal advection, which are maximum over the blue-ice area. Low-frequency turbulent motions induced by the upwind mountains enhance the vertical turbulent transports. Strong gusts and high peak wind speeds over blue-ice areas cause high potential snowdrift transports, which can easily remove the total precipitation, thereby maintaining zero accumulation.

Dynamics of Ferroelectric and Nematic Liquid Crystals Confined in Porous Matrices

1994 ◽  
Vol 366 ◽  
Author(s):  
Fouad M. Aliev
Keyword(s):  
Liquid Crystals ◽  
Heterogeneous Media ◽  
Volume Fraction ◽  
Low Frequency ◽  
Pore Wall ◽  
Polar Molecules ◽  
Average Pore ◽  
Surface Polarization ◽  
The Difference ◽  
Frequency Relaxation

ABSTRACTWe performed dielectric spectroscopy measurements to study dynamics of collective modes of ferroelectric (FLC) and molecular motion of nematic (NLC) liquid crystals with polar molecules confined in silica macroporous and microporous glasses with average pore sizes of 1000 Å (volume fraction of pores 40%) and 100 Å (27%) respectively. For FLC the Goldstone and the soft modes are found in macropores. The rotational viscosity associated with the soft mode is about 10 times higher in pores than in the bulk. These modes are not detected in micropores although low frequency relaxation is present. The last one probably is not connected with the nature of liquid crystal but is associated with surface polarization effects typical for two component heterogeneous media. The difference between the dynamics of orientational motion of the polar molecules of NLC in confined geometries and in the bulk is qualitatively determined by the total energy Fs of the interaction between molecules and the surface of the pore wall, which is found Fs ≈ 102erg/cm2.

High-frequency seismic noise as a function of depth

1991 ◽  
Vol 81 (4) ◽  
pp. 1101-1114
Author(s):  
Jerry A. Carter ◽  
Noel Barstow ◽  
Paul W. Pomeroy ◽  
Eric P. Chael ◽  
Patrick J. Leahy
Keyword(s):  
New York ◽  
High Frequency ◽  
Seismic Noise ◽  
Low Frequency ◽  
Time Variability ◽  
Orthogonal Components ◽  
The Difference ◽  
Frequency Coherence ◽  
Cultural Noise ◽  
Natural Wind

Abstract Evidence is presented supporting the view that high-frequency seismic noise decreases with increased depth. Noise amplitudes are higher near the free surface where surface-wave noise, cultural noise, and natural (wind-induced) noise predominate. Data were gathered at a hard-rock site in the northwestern Adirondack lowlands of northern New York. Between 15- and 40-Hz noise levels at this site are more than 10 dB less at 945-m depth than they are at the surface, and from 40 to 100 Hz the difference is more than 20 dB. In addition, time variability of the spectra is shown to be greater at the surface than at either 335- or 945-m depths. Part of the difference between the surface and subsurface noise variability may be related to wind-induced noise. Coherency measurements between orthogonal components of motion show high-frequency seismic noise is more highly organized at the surface than it is at depth. Coherency measurements between the same component of motion at different vertical offsets show a strong low-frequency coherence at least up to 945-m vertical offsets. As the vertical offset decreases, the frequency band of high coherence increases.

Reproductive cycle of the Manila clam (Ruditapes philippinarum): an intensively harvested invasive species in the Tagus Estuary (Portugal)

2017 ◽  
Vol 98 (7) ◽  
pp. 1645-1657 ◽  
Author(s):  
Paula Moura ◽  
Paulo Vasconcelos ◽  
Fábio Pereira ◽  
Paula Chainho ◽  
José Lino Costa ◽  
...  
Keyword(s):  
Invasive Species ◽  
Reproductive Cycle ◽  
Sexual Maturity ◽  
Ruditapes Philippinarum ◽  
Manila Clam ◽  
Tagus Estuary ◽  
Gonad Maturation ◽  
Oocyte Diameter ◽  
Ruditapes Decussatus ◽  
Spawning Period

The present study aimed to describe the reproductive cycle and estimate the size at sexual maturity of the Manila clam (Ruditapes philippinarum) in the Tagus Estuary (Portugal). Specimens were collected monthly from September 2013 to December 2015 during fishing surveys using bivalve dredges. The gametogenic cycle was described in detail using gonad histology and monitored throughout the study period by the monthly variation in the frequency of gonad maturation stages, mean gonadal index and mean oocyte diameter. This invasive population of R. philippinarum displayed synchronous gonadal development between sexes, with ripening occurring mainly in April and May followed by an extensive spawning period until November–December. Individuals reached the size at first sexual maturity at 29.4 mm in shell length (i.e. before 1 year old). Furthermore, the reproductive strategy, dynamics and potential were compared between the invasive R. philippinarum and the native congeneric carpet shell clam (Ruditapes decussatus). Overall, the data gathered in this study constitutes valuable baseline information to propose conservation strategies and implement management measures to minimize the harmful impacts caused by this invasive species on local ecosystems and native biodiversity, particularly over populations of autochthonous bivalves.

scholarly journals HIV and Hepatitis B seroprevalence among the nepalese blood donors

2013 ◽  
Vol 3 (5) ◽  
pp. 390-393 ◽  
Author(s):  
SR Kandel ◽  
P Ghimire ◽  
BR Tiwari ◽  
M Rajkarnikar
Keyword(s):  
Hepatitis B ◽  
Blood Donors ◽  
Hepatitis B Surface Antigen ◽  
Elisa Test ◽  
Age Group ◽  
Male And Female ◽  
Test Kit ◽  
The Difference ◽  
Donated Blood ◽  
Donor Recruitment

Background: HIV and Hepatitis B infections are public health problems in Nepal. This study was conducted based at NRCS/CBTS, with the objective of determining the HIV and HBsAg sero-prevalence in non-remunerated volunteer blood donors. Materials and Methods: A total of 66,904 units of blood collected, following donor recruitment criteriaduring March 2009-Sept. 2010 was included for analysis. All donated blood samples were subjected to screening for Transfusion transmitted infections including HIV and Hepatitis B surface antigen using standard ELISA test kits (Dade Behring, Germany). Initial reactive sera were re-tested for reconfi rmation with same test kits plus another test kit (Detect-HIV, Adaltis Inc, and Qualisa). Results: Out of 66,904 units of blood collected, 56,973 units were from male and 9,931 were from female donors. Among the total screened samples, 73 (0.10%) were found to be positive for HIV, {0.11% (64/56973) in male and 0.09% (9/9931) in female}; the difference between male and female donors (?2<3.841) was statistically signifi cant. The seroprevalence of HIV was highest in age group of 30- 39 both in male and female (p<0.001). Similarly, for HBsAg, overall seroprevalence was found to be 0.47% (316/66904 {0.42% (242/56973) in male and 0.74% (74/9931) in female}. The difference was statistically signifi cant (?2<3.841). The highest HBsAg sero-prevalence(0.65%) was also observed in same age group i.e. 30-39 (p<0.001) in male but highest seroprevalence (2.63%) was observed inage group of ?50 in female. Conclusion: Both HIV and HBV sero-prevalence is high in adult voluntary blood donors. Journal of Pathology of Nepal (2013) Vol. 3, No.1, Issue 5, 390-393 DOI: http://dx.doi.org/10.3126/jpn.v3i5.7864

scholarly journals A Sociolinguistic Study of Choosing Names for Newborn Children in Jordan

2016 ◽  
Vol 6 (1) ◽  
pp. 177 ◽  
Author(s):  
Abeer Harb Al-Qawasmi ◽  
Fawwaz Al-Abed Al-Haq
Keyword(s):  
Random Sample ◽  
Social Values ◽  
Male And Female ◽  
Personal Names ◽  
The People ◽  
Time Period ◽  
Civil Status ◽  
The Difference ◽  
Different Cultures ◽  
Clear Change

<p>This study aims at the study of newborn names in Jordan of a sociolinguistic perspective. This study tries to detect the difference in naming newborns in Jordan over the decades - from the seventies to 2015 due to the result of some factors that may have affected the Jordanian society, whether historical, religious and/or social. The data necessary to complete the study was obtained from the Civil Status Department and the Department of Statistics. The data obtained consisted of names of both sexes during the time period from the seventies until the early year of 2015, a random sample of personal names within the same family were also provided. The data was analyzed quantitatively. The study revealed that there is a clear change in the choice of newborn names-male and female-in Jordan, whether a change in sounds or in morphemes. In specific, names during the seventies were strongly linked to the culture and the values, religious or social, in which the people believed in. During the eighties and nineties, names were associated with certain social values, however, some names were shown to be affected by urbanization or modernization. And with the beginning of 2000 up to 2015, peoples directions towards naming newborns changed due to the advent of globalization, associating with development and urbanization, and moreover, the influence of different cultures on the community.</p>

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