scholarly journals Growth of juvenile Norwegian spring-spawning herring in relation to latitudinal and interannual differences in temperature and fish density in their coastal and fjord nursery areas

2007 ◽  
Vol 64 (6) ◽  
pp. 1161-1172 ◽  
Author(s):  
Åse Husebø ◽  
Aril Slotte ◽  
Erling Kåre Stenevik

Abstract Husebø, Å., Slotte, A., and Stenevik, E. K. 2007. Growth of juvenile Norwegian spring-spawning herring in relation to latitudinal and interannual differences in temperature and fish density in their coastal and fjord nursery areas. – ICES Journal of Marine Science, 64: 1161–1172. Norwegian spring-spawning herring (Clupea harengus) spawn in February and March along the Norwegian coast from 58°N to 69°N. The larvae are transported north with the coastal current, and in autumn, the main part of the 0-group is found in the Barents Sea, and a smaller and variable fraction ends up in coastal and fjord nursery areas that experience a wide range of environmental conditions and fish densities. Based on data from herring 0–2 years old collected from 1970 to 2004, there is a positive relationship between temperature and the growth of this coastal component, in terms of length, weight, condition factor, and annual otolith increment width, and a negative relationship between acoustic abundance and the same growth indices. In general, juvenile growth decreased northwards along the coast concurrently with decreasing summer and autumn temperatures and increasing acoustic abundance. It seems, therefore, that there may be interference in the relationship between juvenile herring growth and temperature, attributable to variable recruitment, currents, larval drift, and advection into the fjords, causing latitudinal and interannual differences in fish density, and hence variable competition for food.

2010 ◽  
Vol 67 (9) ◽  
pp. 1948-1956 ◽  
Author(s):  
Frode B. Vikebø ◽  
Åse Husebø ◽  
Aril Slotte ◽  
Erling Kåre Stenevik ◽  
Vidar S. Lien

Abstract Vikebø, F. B., Husebø, Å., Slotte, A., Stenevik, E. K., and Lien, V. S. 2010. Effect of hatching date, vertical distribution, and interannual variation in physical forcing on northward displacement and temperature conditions of Norwegian spring-spawning herring larvae. – ICES Journal of Marine Science, 67: 1948–1956. Early hatching has been shown to be associated with increased survival of Norwegian spring-spawning herring (Clupea harengus) larvae. We investigated whether the process behind this association is related to larval drift and ambient temperature. A three-dimensional hydrodynamic model was used to simulate the effect of hatching date on northward displacement and temperature conditions of larvae from spawning grounds off western Norway for 1989–2008. The simulations revealed that the displacement during a period of 60 d was greatest if the larvae hatched early in the season and if they were located near the surface. The relationship between drift speed and ambient temperature was significantly negative, but less so later in the season, because the coastal current became progressively warmer. Results from the simulated interannual variations in larval drift compared with the observed survival suggest that a rapid northward displacement to the main nursery area in the Barents Sea is more important for larval survival than ambient temperature. The significant effect of northward displacement on survival could be explained by reduced overlap with predators and/or higher prey densities, but the causal processes involved remain to be investigated.


Author(s):  
Troy J. Strader ◽  
J. Royce Fichtner ◽  
Suzanne R. Clayton ◽  
Lou Ann Simpson

Employees have access to a wide range of computer-related resources at work, and often these resources are used for non-work related personal activities. In this study, the authors address the relationship between employee’s utilitarian ethical orientation, the factors that create the context that influences their ethical perceptions, and their overall perceptions regarding the level of acceptability for 14 different non-work related computing activities. The authors find that time and monetary cost associated with an activity has a negative relationship to perceived acceptability. Results indicate that contextual variables, such as an employee’s supervisory or non-supervisory role, opportunity, computer self-efficacy, and whether or not an organization has computer use policies, training, and monitoring, influence individual ethical perceptions. Implications and conclusions are discussed for organizations and future research.


2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Fajar Cahyo Utomo

PT. Prima Global Sinagria is a Strategic Consulting & Advisory which also provides Trainning and MICE located in Jakarta, Indonesia. As a developing company, PT. Prima Global Sinagria commited to improve working motivation of their employee by maintaining career development and compensation, further more exploring the effect of recruitment and employee reduction in the company. This research was conducted to support PT. Prima Global Sinagria manifesting its commitment. The objective of this research was to explore the relationship between variables of recruitment, employee reduction, career development, and compensation to working motivation. Quantitative Approach was used in this research with 30 employee as the sample. The instrument measurement applied using validity and reliability technique. Therefore, early testing was conducted using normality, linear and classic assumption test. The results of this research showed the negative relationship between variables recruitment and employee reduction to working motivation, in other side there was positive relationship between variable career development and compensation to working motivation in PT. Prima Global Sinagria. Moreover the result also showed that variable recruitment, employee reduction, career development and compensation only affect 88.6% to the variable motivation, the rest were influenced by another variables.


2003 ◽  
Vol 8 (1) ◽  
pp. 41 ◽  
Author(s):  
A.S. Al-Busaidi ◽  
P. Cookson

Soil pH is the most commonly requested analysis undertaken during farm advisory work. Determination of pH assists in understanding many reactions that occur in soil. Variations in pH between soils have been related to a number of other soil parameters. In this study thirty different soils were collected from agricultural areas to have a wide range of pH, salinity, and texture. The objective was to study the relationship between soil pH and salinity. A negative relationship was found between soil salinity and pH. The main factor contributing to this relationship was probably the presence of soluble Ca2+ ion in soil. Variations in soluble Ca2+ ion concentrations between soils were negatively related to soil pH and positively related to soil salinity. Other soil properties that may affect pH, including CEC, CaCO3, clay content, gypsum and sodium adsorption ratio (SAR), were also determined. 


2011 ◽  
Vol 2 (2) ◽  
pp. 30-44 ◽  
Author(s):  
Troy J. Strader ◽  
J. Royce Fichtner ◽  
Suzanne R. Clayton ◽  
Lou Ann Simpson

Employees have access to a wide range of computer-related resources at work, and often these resources are used for non-work related personal activities. In this study, the authors address the relationship between employee’s utilitarian ethical orientation, the factors that create the context that influences their ethical perceptions, and their overall perceptions regarding the level of acceptability for 14 different non-work related computing activities. The authors find that time and monetary cost associated with an activity has a negative relationship to perceived acceptability. Results indicate that contextual variables, such as an employee’s supervisory or non-supervisory role, opportunity, computer self-efficacy, and whether or not an organization has computer use policies, training, and monitoring, influence individual ethical perceptions. Implications and conclusions are discussed for organizations and future research.


2021 ◽  
Vol 8 ◽  
Author(s):  
Maik Tiedemann ◽  
Aril Slotte ◽  
Richard D. M. Nash ◽  
Erling K. Stenevik ◽  
Olav S. Kjesbu

Larval drift is a key process for successful fish recruitment. We used Norwegian spring-spawning herring (Clupea harengus) as model species to investigate the relationship between larval drift and recruitment. Larval drift indices were derived from simulations based on survey observations between 1993 and 2016. We show that forward simulated larval drift indices have an important positive relation to recruitment success. The relationship demonstrates elevated recruitment when larvae relocate rapidly northwards toward the Barents Sea. Negative or low larval drift indices coincide with only weak recruitment emphasizing limited survival in years with enhanced larval retention. Hence, with this work we combine drift model outcomes refined with survey data indicating that more extensive larval drift is an important component in population dynamics for high-latitude small pelagic fishes. However, larval displacement alone represents only one among many controlling factors but may offer possible predictions of the probability of higher or lower recruitment in the short term. The applicability of the drift indices is adaptable in all world oceans and all marine organisms that occupy planktonic life stages exposed to dynamic ocean currents. The study demonstrates how larval drift indices help to identify larval transport or retention to be crucial for population replenishment.


2020 ◽  
Vol 14 (3) ◽  
pp. 1705-1714
Author(s):  
Md. Arifur Rahman ◽  
Md. Golzar Hossain ◽  
Atul Chandra Singha ◽  
Md. Sayeedul Islam ◽  
Md Ariful Islam

Coronaviruses are a family of viruses causing mild to severe upper respiratory tract syndrome. Recent pandemic threat caused by SARS-CoV-2 first appeared in Wuhan, China in December 2019. Whether the COVID-19 might be affected by warming global temperatures like some of previous pandemic flues. Therefore, the current study aims to analyze the effect of temperature and relative humidity (RH) on the spreading of the SARS-CoV-2 infection. The confirmed cases of COVID-19 in 31 different provinces in China and 274 provinces and/or countries were obtained from an online database. The real time temperature and humidity of the respective regions were taken from another online weather reporting data source. Spearman [R(s)] rank correlation was performed to identify the relationship between the variables (e.g., temperature, number of confirmed cases etc.). The overall spreading of SARS-CoV-2 in relations to temperature was inversely correlated. Among 29 of 31 provinces of China the overall correlation coeffient of the relationship between temperature and viral spread was negative [-R(s)] where in 15 provinces the correlation was at significant level (p<0.05). Furthermore, there was a significant negative relationship observed between the SARS-CoV-2 spreading and air temperature throughout the 274 provinces and/or countries of the world. However, there was no significant co-relationship between humidity and COVID-19 spreading either in China or among countries and/or various regions of the world. The SARS-CoV-2 infection seems to be spread in a wide range of temperature throughout the world. Thus, several factors including temperature, may influnce the SARS-CoV-2 spreading. As a results, relatively elevated air temperature could not completely prevent viral spread but it might be one of the important detrimental factors for SARS-CoV-2 rapid spread.


2008 ◽  
pp. 61-76
Author(s):  
A. Porshakov ◽  
A. Ponomarenko

The role of monetary factor in generating inflationary processes in Russia has stimulated various debates in social and scientific circles for a relatively long time. The authors show that identification of the specificity of relationship between money and inflation requires a complex approach based on statistical modeling and involving a wide range of indicators relevant for the price changes in the economy. As a result a model of inflation for Russia implying the decomposition of inflation dynamics into demand-side and supply-side factors is suggested. The main conclusion drawn is that during the recent years the volume of inflationary pressures in the Russian economy has been determined by the deviation of money supply from money demand, rather than by money supply alone. At the same time, monetary factor has a long-run spread over time impact on inflation.


2016 ◽  
pp. 59-70
Author(s):  
Ninh Le Khuong ◽  
Nghiem Le Tan ◽  
Tho Huynh Huu

This paper aims to detect the impact of firm managers’ risk attitude on the relationship between the degree of output market uncertainty and firm investment. The findings show that there is a negative relationship between these two aspects for risk-averse managers while there is a positive relationship for risk-loving ones, since they have different utility functions. Based on the findings, this paper proposes recommendations for firm managers to take into account when making investment decisions and long-term business strategies as well.


2019 ◽  
Vol 34 (2) ◽  
pp. 367-382
Author(s):  
Irsa Fatima Makhdoom ◽  
Mohsin Atta ◽  
Najma Iqbal Malik

The present study was an endeavor to extend the literature of perceived organizational politics by examining its moderating role between the relationship of organizational citizenship behavior and production deviance. Organizational Citizenship Behavior Scale (Mackenzie, Podsakoff, & Paine, 1999), Production Deviance sub-scale of Counterproductive Work Behavior Checklist-32 (Spector et al., 2006), and Perception of Organizational Politics Scale (Kacmar & Carlson, 1997) were used in present study. Hierarchical regression analyses revealed that low levels of perceived organizational politics moderated the relationship between courtesy and production deviance by strengthening the negative relationship of these behaviors while perceived organizational politics did not act as a moderator for the relationship of civic virtue and conscientiousness with production deviance. High level of go-along-to-get-ahead as a moderator strengthened the relationship of civic virtue and conscientiousness with production deviance and its low level was found to be moderating the relationship between courtesy and production deviance. Future implications of the study were also discussed.


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