Growth pattern and longevity of Parapenaeus fissuroides Crosnier, 1985 (Decapoda, Penaeidae) in Kagoshima Bay, southern Japan

Crustaceana ◽  
2017 ◽  
Vol 90 (2) ◽  
pp. 153-166 ◽  
Author(s):  
Zannatul Farhana ◽  
Jun Ohtomi
Keyword(s):  
Growth Pattern ◽  
Benthic Community ◽  
Carapace Length ◽  
Growth Equation ◽  
Age Group ◽  
Length Frequency ◽  
Frequency Distributions ◽  
Kagoshima Bay ◽  
Males And Females ◽  
Autumn And Winter

Parapenaeus fissuroidesCrosnier, 1985 is an emergent fisheries shrimp resource in the benthic community of Kagoshima Bay. The growth pattern and longevity ofP. fissuroideswere estimated from monthly length-frequency distributions. Carapace length (CL) ranged from 7.7-27.1 mm in males and 6.4-36.1 mm in females. Both males and females were recruited during late autumn and winter. Growth was best described by Pauly & Gaschütz’s growth equation as for males and for females. Females grew faster and reached larger sizes than males of the same age group. The life-span ofP. fissuroideswas estimated to be around 2 years for males and 2.5 years for females.

scholarly journals Morphometric analysis of freshwater crab, Potamon koolooense (Decapoda: Brachyura: Potamidae) from hillstream Khoh, Uttarakhand

2013 ◽  
Vol 14 (1&2) ◽  
pp. 55-59
Author(s):  
Shurveer Singh ◽  
Ashish K. Chowdhary ◽  
Anita Rawat Rana ◽  
S.N. Bahuguna
Keyword(s):  
Morphometric Analysis ◽  
Growth Pattern ◽  
Carapace Length ◽  
Regression Equations ◽  
Freshwater Crab ◽  
Allometric Growth ◽  
Monthly Basis ◽  
Anova Test ◽  
Weight Relationship ◽  
Males And Females

The present study was carried out on freshwater crab in hillstream Khoh of district Pauri Garhwal in Uttarakhand state. Samples of crab were collected from the population inhabits the hillstream Khoh on monthly basis during May 2011 to April 2012. The regression equations for the length-weight relationship in crabs were obtained as Y=2.045X+0.266 and Y=1.522X+0.392 for males and females respectively. The ANOVA test revealed significant differences in carapace length-weight relationship at p<0.05 for both the sexes. Allometric growth pattern was observed in the study for both sexes of P. koolooense. A weak relationship was observed between length and weight of the specimen.

scholarly journals Crown and Cusp Dimensions of the Maxillary First Molar: A Study of Sexual Dimorphism in Indian Jat Sikhs

2018 ◽  
Vol 23 (1) ◽  
pp. 1-6
Author(s):  
Gaurav Agnihotri ◽  
Vimal Sikri
Keyword(s):  
Sexual Dimorphism ◽  
Growth Pattern ◽  
Age Group ◽  
Medical College ◽  
Maxillary Molars ◽  
Maxillary Molar ◽  
Males And Females

The human first maxillary molar provides clues about evolution and is functionally important. Crowns of maxillary molars have four main cusps, each having an independent growth pattern and different evolutionary background. The study aims to quantify the morphometric criterion for the maxillary first molar giving a special emphasis to sexual dimorphism. Measurements of the first maxillary molar were taken on 100 casts of Jat Sikh students (50 males, 50 females) studying in the local medical college in the age group of 17-21 years. The Jat Sikh community of Punjab is endogamous at the caste level. Unpaired t-tests were used to compare the samples for males and females. There is statistically significant sexual dimorphism (P < 0.01) for the maxillary first molar’s crown and cusp components in the Jat Sikhs. The sequence of dimorphism in cusp dimensions corresponds to the order of formation of the cusps. The percentage sexual dimorphism for the hypocone is high (right 7.2%, left 7.4%).

Sexual Dimorphism among the Kathmandu University Students Assessed by Anthropometric Studies

2018 ◽  
Vol 9 (05) ◽  
pp. 20469-20472
Author(s):  
Shakya R ◽  
Bhattacharya SC ◽  
Shrestha R
Keyword(s):  
Young Adults ◽  
Sexual Dimorphism ◽  
Young Adult ◽  
University Students ◽  
Plastic Surgery ◽  
Age Group ◽  
Adult Age ◽  
Clinically Normal ◽  
Crime Detection ◽  
Males And Females

Objectives: To observe the sexual dimorphism among the young adult age group ranging from 18-21 years, of Kathmandu University students by measuring craniofacial circumference and canthal distances. Rationale of the study: These data could be useful for establishing the craniofacial standards and adds an implementation on plastic surgery, crime detection as well as in the industrial field. Method: 300 clinically normal students of Kathmandu University aged between 18-21 years were examined for the study. Fronto-occipital circumference, outer and inner canthal distances were measured. All the parameters were compared between males and females. Result: The cranial circumference as well as the inner and outer canthal distance in males was found to be significantly higher as compared to the females. Conclusion: The results concluded that sexual dimorphism remarkably exists in young adults of Kathmandu University students.

Health Status of Senior Citizens: A Cross-sectional study

2020 ◽  
Vol 11 (01) ◽  
Author(s):  
Priyanka Beniwal ◽  
Chandrakala Singh
Keyword(s):  
Health Status ◽  
Senior Citizens ◽  
Total Sample ◽  
Cross Sectional Study ◽  
Age Group ◽  
Poor Health Status ◽  
Cross Sectional ◽  
Males And Females ◽  
The Individual ◽  
Average Health

Aging is a series of processes that begin with life and continue throughout the lifecycle. It represents the closing period in the lifespan, a time when the individual looks back on life, lives on past accomplishments and begins to finish off his life course. It represents the accumulation of changes in person over time. The study aims to investigate the health status of senior citizens. The present study was carried out in Hisar and Sirsa district of Haryana state. A total of 400 elderly equally representing both males and females of age group 65-70 years were selected randomly for the study. Modified inventory developed by Khan and Lal (2011) was used to assess health status of senior citizens. The results of the study elucidated that health status of senior citizens depicted that 54.25 per cent of the total respondents had average health status followed by good (25.25%) and poor health status (20.50%). The most common health problems reported by the senior citizens were joint pains, back pains, blood pressure, and chest pain etc. Gender wise comparison of total sample further pointed out that females were poor in their health against males.

Age and growth pattern of the thin-lipped mullet Liza Ramada in the Eastern coast of Libya.

2016 ◽  
Vol 5 (06) ◽  
pp. 4620
Author(s):  
Manal M. Khalifa ◽  
Ramadan A. S. Ali ◽  
Abdalla N. Elawad* ◽  
Mohammad El. ElMor
Keyword(s):  
Frequency Distribution ◽  
Age Groups ◽  
Age Determination ◽  
Age And Growth ◽  
Eastern Coast ◽  
Growth Equation ◽  
Length Frequency Distribution ◽  
Length Frequency ◽  
Scale Reading ◽  
Von Bertalanffy Growth Equation

Age and growth characteristics of the thin-lipped Grey Mullet (Liza ramada) were investigated in Eastern coast of Libya. Aging was done by two methods: counting annuli on scales and by length frequency distribution, a total of 218 scales were studied for age determination, in addition of 334 fishes specimen for length frequency distribution reading. Four age groups were determined from scale reading, and five age groups from length frequency distribution methods, the parameters of the Von Bertalanffy growth equation for both sex of all individuals were estimated at 35.4 cm, 0.187 per year, -1.14 years and 2.4, for male were estimated at 35.7 cm, 0.17 per year, -1.367 and 2.3, for female were 38.6 cm, 0.156 per year, -1.383 and 2.4, for L∞, k and t0, and φ′, respectively.

scholarly journals Cuttlebone morphometrics and sex identification of Sepia bertheloti (d’Orbigny, 1835) from the central-east Atlantic

2019 ◽  
Vol 73 (1) ◽  
Author(s):  
Airam Guerra-Marrero ◽  
David Jiménez-Alvarado ◽  
Vicente Hernández-García ◽  
Leticia Curbelo-Muñoz ◽  
José Juan Castro-Hernández
Keyword(s):  
Morphometric Analysis ◽  
Growth Pattern ◽  
Gonadal Development ◽  
Sex Identification ◽  
East Atlantic ◽  
Subsequent Increase ◽  
Northwest Africa ◽  
Males And Females

Abstract Analysis of 322 cuttlebones of Sepia bertheloti caught in the waters of the Northwest Africa showed significant differences in growth between males and females. Morphometric analysis revealed a relatively different cuttlebone growth pattern between sexes, with males presenting faster growth in length to reach larger sizes and females displaying greater growth in width. This difference in cuttlebone growth is related to female gonadal development and the subsequent increase of the paleal cavity, providing more support and space to accommodate a higher number of oocytes.

Reference points for the length-based indicator Lmax5% for use in the assessment of data-limited stocks

2019 ◽  
Vol 76 (7) ◽  
pp. 2125-2139 ◽  
Author(s):  
Tanja Miethe ◽  
Yves Reecht ◽  
Helen Dobby
Keyword(s):  
Life Histories ◽  
Stock Assessment ◽  
Reference Points ◽  
Length Frequency ◽  
Frequency Distributions ◽  
Simulation Tools ◽  
Spawning Potential Ratio ◽  
The Mean ◽  
Commercial Sources ◽  
Length Frequency Data

Abstract In the absence of abundance indices from scientific surveys or commercial sources, reliable length frequency data from sampled commercial catches can be used to provide an indirect assessment of fishing mortality. Length-based indicators are simple metrics which describe length frequency distributions. The length-based indicator Lmax5%, the mean length of the largest 5% of individuals in the catch, combined with appropriately selected reference points, can be used to evaluate the presence of very large individuals in the catch and hence determine exploitation level. Using analytical per-recruit models, we derive reference points consistent with a spawning potential ratio of 40%. The reference points depend on the life history parameters for natural mortality, maturity, and growth (M, Lmat, L∞, k, CVL∞). Using available simulation tools, we investigate the sensitivity of the reference points to errors in these parameters and explore the usefulness of particular reference points for management purposes for stocks with different life histories. The proposed reference points are robust to uncertainty in length at first capture, Lc, and take into account the maturation schedule of a species. For those stocks with high M/k ratios (&gt;1), Lmax5%, combined with the appropriate reference point, can be used to provide a data-limited stock assessment.

Size Distributions and Growth of the Fan-shell Pinna bicolor Gmelin (Mollusca : Eulamellibranchia) in South Australia

1979 ◽  
Vol 30 (1) ◽  
pp. 25 ◽  
Author(s):  
AJ Butler ◽  
FJ Brewster
Keyword(s):  
South Australia ◽  
Adductor Muscle ◽  
Size Distributions ◽  
Limited Data ◽  
Length Frequency ◽  
Age Classes ◽  
Frequency Distributions ◽  
Growth And Survival ◽  
Random Samples ◽  
Variable Success

Fourteen random samples of Pinna bicolor were collected over a period of 31 months from 6 m depth in Gulf St Vincent off Edithburgh, South Australia. The length-frequency distributions suggest that: P. bicolor larvae settle in spring but with variable success; growth of newly settled young is rapid over summer; by age 1 year their modal shell length is about 20 cm; by age 2 it is about 26 cm; they may survive substantially longer than 3 years so that a length-class of mode c. 35 cm is always present and is composed of several age-classes not necessarily equally represented. These suggestions are corroborated by limited data on adductor muscle scars, the development of epibiota on the shells, and the growth and survival of tagged animals over 9 months.

Smartphone-induced Behaviour: Utilisation, Benefits, Nomophobic Behaviour and Perceived Risks

2021 ◽  
pp. 097325862097951
Author(s):  
Kshitiz Sharma ◽  
T. Sarathamani ◽  
Sunil Kumar Bhougal ◽  
Hemant Kumar Singh
Keyword(s):  
Social Anxiety ◽  
Social Relationships ◽  
Private University ◽  
Age Group ◽  
Perceived Risks ◽  
Factors Influencing ◽  
Use Of Technology ◽  
Financial Benefits ◽  
Significant Difference ◽  
Males And Females

Smartphone has become an essential part of human lives. People tend to treat it as another part of their body. Besides communication purposes, it is used for searching information, monetary transactions, shopping, social networking, entertainment, etc. This study aims at analysing the factors influencing smartphone usage and behavioural changes among college students under four constructs: utilisation, benefits, nomophobic behaviour and perceived risks (UBNR). An instrument was created with factors concerning the research and administered in a top-ranked private university of Bangalore, India. The research was carried out with a total of 122 responses. The results show that there is no significant difference in the attitude of males and females in most of the factors except social anxiety. Females experience more social anxiety and use smartphone more for maintaining their social relationships. There is no significant difference between the age group of students in all the four constructs. Utilisation is positively related with psychological, social, functional and financial benefits and shows that the greater the usage of smartphone, the greater are the benefits. On the other hand, the study reveals that increased usage of smartphone leads to addiction, causes nomophobia and poses threat of perceived risks. A mediation strategy like educating the students for proper use of technology is necessary to overcome the risk of addiction and developing nomophobia.

Application of the otolith weight – age relationship for the pilchard, Sardinops sagax neopilchardus

1995 ◽  
Vol 52 (4) ◽  
pp. 657-664 ◽  
Author(s):  
W. J. Fletcher
Keyword(s):  
Maximum Size ◽  
Steady Increase ◽  
Average Weight ◽  
Fish Length ◽  
Natural Mortality ◽  
Length Frequency ◽  
Age Classes ◽  
Frequency Distributions ◽  
Southwestern Australia ◽  
Sardinops Sagax

Adult pilchard (Sardinops sagax neopilchardus) from southwestern Australia held in fish cages for 1 year showed minimal increase in mean length but a steady increase in mean otolith weight (1.61–1.83 mg); this increase (0.22 mg) closely parallels the previously calculated mean difference between adjacent age classes (0.24 mg). Modes in otolith weight frequency distributions of fishery-caught pilchards, previously suggested as corresponding with separate year classes, generally persisted and progressed through subsequent samples. By contrast, fish length frequency distributions of these samples showed no consistent modal progression. The average weight of otoliths for year classes 2–8 were used to calculate growth rates: following sexual maturity, at age 2, males grew to a significantly smaller maximum size than females (L∞ = 162 and 172 mm respectively). The otolith weight – age relationship, validated by following a cohort of unusually low abundance as it moved through the fishery, indicated that recruitment to the fishery generally began at age 2 but was not complete until age 4. These data have been successfully used in forecasting the catch rate of the fishery up to 2 years in advance and providing an estimate of the rate for natural mortality of 0.43.

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