The Fecundity Of Pacific Herring (Clupea pallasi) in British Columbia Coastal Waters

1958 ◽  
Vol 15 (3) ◽  
pp. 313-330 ◽  
Author(s):  
Fuzuko Nagasaki
Keyword(s):  
Growth Rate ◽  
British Columbia ◽  
Body Length ◽  
Coastal Waters ◽  
Early Spring ◽  
Pacific Herring ◽  
Clupea Pallasi ◽  
Relationship Of ◽  
The Relationship

The fecundity of Pacific herring was investigated from a collection of 600 ovaries gathered from various localities along the British Columbia coast during the winter and early spring of 1954–55. It was found that fecundity depended mainly on body length and to a lesser extent on age, independently of its effect on body length. Certain differences in fecundity, found between herring from various localities when die relationship of fecundity to body length was considered, were not found when the relationship between fecundity, body length and age was considered. These differences were attributed to differences in growth rate. Fecundity of herring of same body length and the same age was found to be significantly higher in northern British Columbia than in southern.

Inhibition of smolting in precocious male chinook salmon, Oncorhynchus tshawytscha

1991 ◽  
Vol 69 (7) ◽  
pp. 1848-1852 ◽  
Author(s):  
Chris J. Foote ◽  
W. C. Clarke ◽  
J. Blackburn
Keyword(s):  
Growth Rate ◽  
British Columbia ◽  
Specific Growth Rate ◽  
Body Length ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Specific Growth ◽  
Early Spring ◽  
Growth Patterns ◽  
Precocious Males

The ontogeny of precocious maturation in chinook salmon from Nicola River, British Columbia, was examined in conjunction with the effects of such maturation on smoltification and growth. A high proportion (56%) of male parr matured as yearlings. The growth patterns of precocious males and nonmaturing individuals of both sexes differed significantly. Precocious males appeared to grow rapidly relative to nonmaturing individuals in the early spring, but thereafter displayed a decreasing specific growth rate. In addition, precocious individuals gained more weight per increment of body length than nonmaturing individuals. The seawater adaptability of precocious individuals was lower than that of nonmaturing individuals at the three monthly sampling periods and decreased steadily as maturation proceeded.

Association of collateral status and ischemic core growth in patients with acute ischemic stroke

Neurology ◽  
2020 ◽  
pp. 10.1212/WNL.0000000000011258
Author(s):  
Longting Lin ◽  
Jianhong Yang ◽  
Chushuang Chen ◽  
Huiqiao Tian ◽  
Andrew Bivard ◽  
...  
Keyword(s):  
Growth Rate ◽  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Ct Perfusion ◽  
Study Cohort ◽  
Vessel Occlusion ◽  
Ischemic Core ◽  
Relationship Of ◽  
The Relationship ◽  
Linear Regressions

ObjectiveTo test the hypothesis that acute ischemic patients with poorer collaterals would have faster ischemic core growth, we included 2 cohorts in the study, cohort 1 of 342 patients for derivation and cohort 2 of 414 patients for validation purpose.MethodsAcute ischemic stroke patients with large vessel occlusion were included. Core growth rate was calculated by the following equation: Core growth rate = Acute core volume on CTP/Time from stroke onset to CTP. Collateral status was assessed by the ratio of severe hypoperfusion volume within the hypoperfusion region of CTP. The CTP collateral index was categorized in tertiles; for each tertile, core growth rate was summarized as median and inter-quartile range. Simple linear regressions were then performed to measure the predictive power of CTP collateral index in core growth rate.ResultsFor patients allocated to good collateral on CT perfusion (tertile 1 of collateral index), moderate collateral (tertile 2), and poor collateral (tertile 3), the median core growth rate was 2.93 mL/h (1.10–7.94), 8.65 mL/h (4.53–18.13), and 25.41 mL/h (12.83–45.07) respectively. Increments in the collateral index by 1% resulted in an increase of core growth by 0.57 mL/h (coefficient = 0.57, 95% confidence interval = [0.46, 0.68], p < 0.001). The relationship of core growth and CTP collateral index was validated in cohort 2. An increment in collateral index by 1% resulted in an increase of core growth by 0.59 mL/h (coefficient = 0.59 [0.48–0.71], p < 0.001) in cohort 2.ConclusionCollateral status is a major determinant of ischemic core growth.

Post-natal growth changes in the fibre cortex and medulla of the new zealand romney and N-type sheep

1959 ◽  
Vol 53 (3) ◽  
pp. 358-368 ◽  
Author(s):  
Janet P. Tibbits
Keyword(s):  
Growth Rate ◽  
New Zealand ◽  
Cortical Area ◽  
Genotypic Effect ◽  
Fibre Area ◽  
Fibre Growth ◽  
Skin Biopsies ◽  
Growth Changes ◽  
Relationship Of ◽  
The Relationship

The relationship between cortical area and fibre area has been examined in the N/N, N/ +, + / +, + /nr and nr/nr genotypes of the New Zealand Romney, using skin biopsies taken at birth, 1, 3 and 16 months of age. The presence of the nr gene was shown to reduce significantly the relative cortical area. Within the genotypes there was an increase in relative cortical area with increasing age and in two-tooth ewes of N/N and N/ + there was an increase in relative cortical area in winter compared to summer.Fibre growth rates in length for primaries and for prenatal and post-natal secondaries were found for lambs between 1 and 3 months and for 16-monthold ewes. In N/N, N/+ and nr/nr primary fibre growth tended to be increased and post-natal secondary fibre growth tended to be decreased relative to + / + values.In both cortical area and fibre growth rate the greatest genotypic effect was shown by the primary fibres.Some estimates of cortical volume have been made by combining the information on cortical area and fibre growth rate and the relationship of these factors to follicle density and mean fibre area has been discussed. Finally, an indication has been given of how the associations of all these four factors might be usefully examined in some British breeds.

The relationship of skin follicle development to growth rate in sheep.

1955 ◽  
Vol 6 (2) ◽  
pp. 308 ◽  
Author(s):  
PG Schinckel
Keyword(s):  
Growth Rate ◽  
Birth Weight ◽  
Growth Conditions ◽  
Considerable Importance ◽  
Follicle Development ◽  
Factors Affecting ◽  
Relationship Of ◽  
The Relationship

Observations are reported on factors affecting the ratio of secondary to primary follicles (SJP) in a flock of Merino sheep.It was found that all follicles were initiated prior to birth but that the number which finally came to maturity (production of fibre) was significantly affected by birth weight and growth from birth to 1 month. Growth at later ages appeared to be unimportant. There was a significant correlation (r = +0.29) between birth weight and log potential S/P at birth. This is interpreted to indicate that while pre-natal growth conditions affect the number of follicles initiated, other factors are also of considerable importance. It is concluded that the larger animals at birth also have a greater total number of primary follicles than smaller animals. It is further concluded that this difference in total primary follicles results primarily from differences in size a t the 90th day of pre-natal life rather than from differences in density a t that time.

The relationship of anthropometric characteristics and motor abilities of adolescents

2020 ◽  
pp. 144-153
Author(s):  
Nikita A. Kolesnichenko ◽  
Igor M. Demets ◽  
Sergey N. Simonov
Keyword(s):  
Body Length ◽  
Significant Relationship ◽  
School Students ◽  
Anthropometric Parameters ◽  
Sports Clubs ◽  
Motor Abilities ◽  
Anthropometric Characteristics ◽  
Relationship Of ◽  
The Relationship ◽  
Sports Selection

The relationship between anthropometric parameters and the level of development of motor abilities of school students is a scientifically important and practically important topic. Using knowledge of physical development indicators it is possible to predict the success of the development of motor skills. These data can be used in the sports selection and building an effective system of physical education in secondary school. We measure the anthropometric parameters and test motor abilities of 160 school students of the city of Tambov at the age of 15. We conduct a correlation and regression analysis of the relationship of individual anthropometric characteristics (body length and weight, chest circumference and chest excursion) and motor abilities (speed, speed-strength, strength, coordination, general endurance and flexibility). As among boys, and among girls we reveal a direct distinctive and statistically significant correlation between body length and speed and coordinating abilities, as well as general endurance. Body weight of school students did not have a pronounced and statistically significant relationship with motor abilities. The circumference of the chest and excursion of the chest in young men had a pronounced, statistically significant relationship with the level of development of all the analyzed motor is capable of power. In girls the correlation was either not sufficiently, or had a different direction that indicates the absence interdependence. The obtained data allow to build a targeted strategy of development of motor abilities of adolescents on the lessons of physical culture at comprehensive school. The results of the study can be used by coaches in sports clubs for sports selection and sports orientation.

scholarly journals Association of electronic cigarette usage and nicotine consumption frequency of young adults in British Columbia

2019 ◽  
Author(s):  
Adora Kwong ◽  
BCIT School of Health Sciences, Environmental Health ◽  
Dale Chen
Keyword(s):  
British Columbia ◽  
Young Adults ◽  
Online Survey ◽  
Electronic Cigarette ◽  
Health Concern ◽  
Consumption Frequency ◽  
Nicotine Consumption ◽  
Relationship Of ◽  
The Relationship

Background Electronic e-cigarette ever users has been increasing as of 2015, the most prevalent ever users being young adults aged 20-24 years old. The implication of e-cigarette ever user developing into long term users is a emerging public health concern. Methods Electronic cigarette usage frequency and nicotine consumption was measured through a self-administered online survey of young adults (n= 54). Survey was advertised through social media sites between January 2019 till February 2019. Descriptive and inferential statistic was conducted using NCSS 12 to examine the association between electronic cigarette usage and nicotine consumption. Results Among young adults aged 19 to 24 years old, the frequency of e-cigarette usage was 51% high usage, 31% no usage and 16% medium and low usage. For nicotine consumption, respondents were 25% daily, 40% no use, 18% infrequent, and 14.8% frequent. Conclusion There is an association between more frequent electronic cigarette usage and higher nicotine consumption among young adults in British Columbia. Frequency e-cigarette users were found to consumption nicotine at higher frequency then non users. Further research is needed to fully understand the extent of the relationship of if e-cigarette usage promotes daily nicotine consumption or daily nicotine consumption results in higher e-cigarette usage.  

The Relationship of Sporulation, Sclerotia Production, and Growth Rate to Virulence and Fitness of Sclerotium oryzae

1975 ◽  
Vol 65 (9) ◽  
pp. 972 ◽  
Author(s):  
S. A. Ferreira
Keyword(s):  
Growth Rate ◽  
Relationship Of ◽  
The Relationship

scholarly journals Determinants of Dividend Policy: A Panel Data Analysis for Turkish Listed Firms

2015 ◽  
Vol 10 (11) ◽  
pp. 149 ◽  
Author(s):  
Narman Kuzucu
Keyword(s):  
Growth Rate ◽  
Panel Data ◽  
Stock Market ◽  
Dividend Policy ◽  
Emerging Market ◽  
Panel Data Analysis ◽  
Firm Level ◽  
Family Control ◽  
Relationship Of ◽  
The Relationship

<p>Dividend policy of firms is one of the most controversial issues of theoretical finance. This paper aims to investigate the firm-level factors influencing the dividend decisions of firms from an emerging market. We examined eight-year panel data for the period from 2006 to 2013 from the Turkish stock market (Borsa Istanbul). The results show that financial leverage, size, growth rate, age, profitability, ownership structure and P/E ratio are statistically significant. The relationship of leverage, growth rate, profitability and family control with dividends is negative, whereas the relationship of size, age and P/E ratio is positive. Therefore, firms with higher debt ratios / growth rates / higher earnings are likely to retain more of their earnings. The empirical evidence from the Turkish stock market shows that the maturity hypothesis proposed by Grullon, Michaely and Swaminathan (2002) best explains the dividend behaviors of firms. Accordingly, as a firm matures, the availability of profitable projects reduces and earnings decrease. As the investment opportunities reduce, the need for resources decreases and the firm increases dividend payouts to shareholders.</p>

scholarly journals Foraging Behaviors of Surf Scoters and White-Winged Scoters During Spawning of Pacific Herring

The Condor ◽  
2007 ◽  
Vol 109 (1) ◽  
pp. 216-222 ◽  
Author(s):  
Tyler L. Lewis ◽  
Daniel Esler ◽  
W. Sean Boyd
Keyword(s):  
Radio Telemetry ◽  
Search Time ◽  
Early Spring ◽  
Pacific Herring ◽  
Clupea Pallasi ◽  
Melanitta Perspicillata ◽  
Courtship Behaviors ◽  
Spawning Periods ◽  
Winter Diets

Abstract Abstract Winter diets of Surf (Melanitta perspicillata) and White-winged Scoters (M. fusca) are composed primarily of bivalves. During spawning of Pacific herring (Clupea pallasi) in early spring, scoters shift their diets to herring eggs. Using radio-telemetry, we contrasted scoter foraging behaviors between winter and herring spawning periods. Scoters increased their dive durations during herring spawning, likely to maximize the amount of roe consumed per dive; in winter, dives were typically terminated upon clam capture. Scoters spent approximately 50% less time foraging (min underwater hr−1) and decreased their dive rate (dives hr−1) by 70% when feeding on roe. The observed reduction in time spent foraging was presumably caused by the abundance of herring eggs, and thus a reduction in prey search-time. Scoters were able to meet energetic requirements with reduced effort, despite potentially increased demands related to spring fattening. Less time spent foraging may also allow more time for premigratory courtship behaviors.

Predation by Medusae on Pacific Herring (Clupea harengus pallasi) Larvae

1982 ◽  
Vol 39 (11) ◽  
pp. 1537-1540 ◽  
Author(s):  
Mary Needler Arai ◽  
Douglas E. Hay
Keyword(s):  
British Columbia ◽  
Coastal Waters ◽  
Laboratory Tests ◽  
Clupea Harengus ◽  
Aurelia Aurita ◽  
Pacific Herring ◽  
Aequorea Victoria ◽  
Clupea Harengus Pallasi

In laboratory tests young Pacific herring (Clupea harengus pallasi) larvae were eaten by several species of hydromedusae common in coastal waters off British Columbia, including the previously controversial Sarsia tubulosa and by the scyphomedusa Aurelia aurita. Field collections and observations confirmed that the distributions of medusae and larvae overlap and that some medusae feed on herring larvae in nature. In coastal waters and bays of British Columbia, the hydromedusae Sarsia tubulosa or Aequorea victoria may be most abundant during the time of peak herring larvae abundance.Key words: herring, larvae, Clupea, Sarsia, Aequorea, predation, medusae

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