Mate Selection in a Population of Sockeye Salmon (Oncorhynchus nerka) of Mixed Age-groups

1967 ◽  
Vol 24 (9) ◽  
pp. 1955-1977 ◽  
Author(s):  
Arthur J. Hanson ◽  
Howard D. Smith
Keyword(s):  
Mate Selection ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Age Groups ◽  
Different Types ◽  
Skeena River ◽  
The Relationship ◽  
Mixed Age

Anadromous Skeena River sockeye mature and spawn mainly at ages 42 and 52. Lesser numbers of 32, 53, and 63 and 64 fish, and non-anadromous kokanee, may spawn in the same stream. Mate selection by the different types was studied by observing salmon of known length and using the relationship found between length and age in dead, spawned fish.Fish of all lengths tended to mate with similar sized fish. Small males were less successful in holding mates than were large males because they could not successfully defend redds against larger intruders. Small males spent more time alone than large ones and frequently lay in groups behind mating pairs. The term "satellite male" is used in describing the behaviour. Small females mated with large males but spent more time alone than did large females.The genetic implications of mating within age-groups are considered.

Fecundity and Egg Retention of Some Sockeye Salmon (Oncorhynchus nerka) Stocks in British Columbia

1986 ◽  
Vol 43 (8) ◽  
pp. 1643-1655 ◽  
Author(s):  
J. I. Manzer ◽  
I. Miki
Keyword(s):  
British Columbia ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Absolute Fecundity ◽  
Egg Retention ◽  
Inadequate Sample Size ◽  
Egg Number ◽  
The Mean ◽  
The Relationship ◽  
Individual Fecundity

The fecundity and egg retention of anadromous female sockeye salmon (Oncorhynchus nerka) collected during 1971–82 from several stocks in British Columbia undergoing controlled fertilization to enhance adult sockeye production were examined. The relationship between egg number and postorbital–hypural length based on 863 females representing 14 stocks was not consistent between all age-types, stocks, and years, probably because of inadequate sample size in some instances. Combined samples, however, revealed a significant positive relationship between postorbital–hypural length and egg number for age 1.2, 1.3, and 2.2 females. Mean absolute fecundity for the respective age-types was 3218, 4125, and 3544 eggs. For samples of 10 or more females, significant stock and annual differences were detected when individual mean absolute fecundity was adjusted to a postorbital–hypural length of 447 mm, but not for females of different age. A comparison of mean fecundities for coastal stocks with historical data for interior British Columbia stocks suggests that coastal stocks are 18% more fecund than interior stocks. Possible causal mechanisms for this regional difference are hypothesized. Examination of 796 carcasses (representing five stocks) for egg retention revealed a range from totally spawned to totally unspawned females, with 56% of the carcasses containing 20 eggs or less and 68% containing 50 eggs or less. The mean egg retention based on all samples combined was estimated to be 6.5% of the mean individual fecundity. This value was reduced to 3.9% when stock means were averaged.

scholarly journals A Study into Psychological Mindedness in Relation to Different Types of Reflection

2019 ◽  
Author(s):  
Olesya Putilova ◽  
◽  
Olga Vindeker ◽  
Tat’yana Smorkalova ◽  
◽  
...  
Keyword(s):  
Age Groups ◽  
Individual Therapy ◽  
Clinical Approach ◽  
Psychological Mindedness ◽  
Subjective Experiences ◽  
Different Types ◽  
Therapy Effectiveness ◽  
And Gender ◽  
Gender Groups ◽  
Mixed Age

The paper describes the results of the empirical study into psychological mindedness in relation to different types of reflection. The relevance of the paper is determined by the necessity to explore such human psychological characteristics that contribute to successful adaptation in the world of information abundance, uncertainty and inconsistency. The consistency between tolerance towards uncertainty and openness to change, on the one hand, and an interest in subjective experiences (own and others’ experiences), interest in internal processes, on the other, was called psychological mindedness. Initially, this concept was used in the framework of a clinical approach due to the necessity to examine the psychological factors of group and individual therapy effectiveness. Later it became clear that psychological mindedness could be a reliable predictor of an individual’s success in different lines of work. In Russia, this construct is under-researched. That is why this given study aimed to collect empirical data on the linkage between psychological mindedness and the highest adaptive type of reflection on a sample of Russian testees. The sample consisted of 149 respondents aged 18 – 65. Methods exploited in the study included Psychological Mindedness Scale by H. R. Conte (adapted by M. A. Novikova and T. V. Kornilova) and Differential Test of Reflexivity by D. A. Leont’ev, et al. The obtained data have confirmed the hypothesis of a connection between psychological mindedness and the systemic reflection. A positive correlation between one of the aspects of psychological mindedness – an interest in the sphere of subjective experiences – and introspection and quasi-reflection was found. Introspection as one of ineffective forms of reflection is negatively linked to the most important parameter of psychological mindedness – subjective availability of experiences for comprehension and analysis. In the course of correlation analysis the specificity of interrelations between psychological mindedness and types of reflection in women, men and mixed-age groups was revealed. The obtained data allow for clarifying the concept of psychological mindedness and differentially carrying out further studies on mixed-age and gender groups.

The role of affect in practicing a musical instrument: A systematic review of the literature

2019 ◽  
Vol 47 (6) ◽  
pp. 848-863
Author(s):  
Zofia Mazur ◽  
Mariola Laguna
Keyword(s):  
Systematic Review ◽  
Age Groups ◽  
Instrumental Learning ◽  
Musical Instrument ◽  
Music Learning ◽  
Different Types ◽  
Instrumental Practice ◽  
The Relationship ◽  
Context Free

Affect impacts people’s cognitive processes as well as provides the energy to pursue goals and engage in actions. Research suggests that affect might influence instrumental learning behavior. This review aims to summarize the existing literature concerning the relationship between affect and instrumental practice. In order to determine the role of affect in undertaking instrumental practice and in engagement in practice, we conducted a systematic search via electronic databases and reference lists; we also hand-searched the key journals. Studies were included in the review if they concerned both affect and practicing behavior in musicians and instrumental students across all age groups and if the relationships between the two constructs were investigated. We focused on individual instrumental practice in the classical repertoire. Eleven studies met our inclusion criteria. They reported quantitative relationships between affect and the amount of practice or qualitatively described the role of affect in practice engagement. The results of this systematic review show that practicing a musical instrument is associated with different types of affect—practice-related, performance-related, and context-free affect. Further investigation of affect in the context of music learning may inform future interventions for instrumentalists motivating them to practice.

Movements of Sockeye Salmon (Oncorhynchus nerka) in the Skeena River Estuary as Revealed by Ultrasonic Tracking

1975 ◽  
Vol 32 (2) ◽  
pp. 233-242 ◽  
Author(s):  
C. Groot ◽  
K. Simpson ◽  
I. Todd ◽  
P. D. Murray ◽  
G. A. Buxton
Keyword(s):  
Tidal Cycle ◽  
Sockeye Salmon ◽  
Salt Water ◽  
Oncorhynchus Nerka ◽  
River Estuary ◽  
River Mouth ◽  
Tidal Flows ◽  
Skeena River ◽  
Ultrasonic Tracking ◽  
Passive Movements

Movements of adult sockeye salmon (Oncorhynchus nerka) entering the Skeena River were examined in 1969 and 1970 by ultrasonic tracking methods. Fifteen of 18 sockeye released in the lower river seemed to move passively in and out with flood and ebb streams. Two fish moved upstream independent of tides and one salmon swam against ebb and flood currents. Ground speeds in both years of operation were 1.6 km/h during rising and 2.1 km/h during falling tides, causing the fish to be transported downstream by about 3 km per tidal cycle. Three salmon released outside the river mouth in salt water also seemed to ride the tidal flows passively. Ground speeds during ebb (3.6 km/h) were again greater than during flood (2.0 km/h), indicating a net offshore movement. We conclude that these passive movements are not an artifact but that sockeye salmon normally slow down or pause upon reaching the "home river" and drift for a period in tidal currents in the estuary and river mouth before migrating upstream.

A Nonparametric Approach to Generating Inseason Forecasts of Salmon Returns

1989 ◽  
Vol 46 (12) ◽  
pp. 2046-2055 ◽  
Author(s):  
D. J. Noakes
Keyword(s):  
Sockeye Salmon ◽  
Ad Hoc ◽  
Parametric Models ◽  
Probability Density Estimation ◽  
Nonparametric Approach ◽  
Conditional Expectations ◽  
Skeena River ◽  
Changes Over Time ◽  
The Relationship ◽  
Quantities Of Interest

Variations in the size and timing of salmon runs have frustrated attempts to develop models for updating forecasts of returns inseason. The relationship between run size and inseason predictor variables is often nonlinear and changes over time. The nature of these nonlinearities is generally not known and analysts have elected to approximate observed patterns in the data with ad hoc parametric models. Although conceptually attractive, the performance of these models is frequently degraded by their inflexibility and failure to satisfy key model assumptions. In this paper, nonparametric probability density estimation techniques are employed to calculate the total run size conditional on the observed inseason data. Unlike the parametric techniques, the nonparametric approach allows the data to speak for themselves instead of having to merely conform to some arbitrary mathematical model. The approach is easily adapted to handle information from either terminal or guantlet fisheries and can be generalized to compute conditional expectations of various quantities of interest including run size, run timing, or both. Weekly estimates of the number of sockeye salmon (Oncorhynchus nerka) returning to the Skeena River, British Columbia, are employed to demonstrate the performance of the model.

Population Estimates of Sockeye Salmon (Oncorhynchus nerka) in a Fertilized Oligotrophic Lake

1978 ◽  
Vol 35 (6) ◽  
pp. 851-860 ◽  
Author(s):  
D. G. Robinson ◽  
W. E. Barraclough
Keyword(s):  
Survival Data ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Age Groups ◽  
Close Correlation ◽  
Oligotrophic Lake ◽  
Population Estimates ◽  
Good Resolution ◽  
Growth And Survival ◽  
Carry Over

Pelagic juvenile sockeye salmon (Oncorhynchus nerka) populations were studied in Great Central Lake, British Columbia, during 1969–76 to determine the effect of nutrient enrichment upon their growth and survival. Data for population estimates were collected concurrently by a high-frequency echosounder, and a midwater trawl whose efficiency was inversely related to ambient light above about 1.9 × 10−5 lx. Echogram counts supplemented by trawl catches yielded estimates with low variance, good resolution between age-groups, and indicated close correlation between numbers of spawners and resultant progeny within respective treatments. Survival to the fall for the treated 1969–72 brood years averaged 11.65% (range 11.11–12.81%) of potential egg deposition compared to 3.5% for the pretreatment 1968 brood year fish; 2.73 and 6.29% for the posttreatment 1974 and 1975 brood year fish. A carry-over of fertilization effects on the immediate posttreatment 1973 brood year may have induced a cyclic pattern on the survival of the two succeeding year-classes. The relatively consistent annual production of age 0+ sockeye may be due to the inherent stability of inlake spawning and incubation coupled with the low predation rates. The conservative estimate of a 2.5 increase in survival relative to the natural level indicates a positive response to enhanced feeding conditions caused by the fertilization of this oligotrophic lake. Key words: sockeye, survival, Great Central Lake, fertilization, enhancement, acoustic estimates, townet efficiency

PSYCHOSEMANTIC FEATURES OF PERCEPTION OF ANIMATED ADVERTISEMENT OF YOUTH TARGET AUDIENCE

2020 ◽  
pp. 188-208
Author(s):  
O. P. Sosniuk ◽  
І. Yu. Vlasiuk
Keyword(s):  
Emotional Intelligence ◽  
Empirical Research ◽  
Age Groups ◽  
Target Audience ◽  
Consumer Motivation ◽  
Different Types ◽  
Low Levels ◽  
High Level ◽  
The Relationship

The article is devoted to the analysis of the results of empirical research of psychosemantic features of perception of animation advertising by the representatives of the youth target audience. Differences in the perception of animation advertising between representatives of three age groups within the youth target audience were established. The authors identified four factors (“Confidence”, “Attractiveness”, “Trust”, “Consumer Activity”), which are manifested in the perception of animation advertising by young teens (12-15 y.o.). At the same time, for аdolescence teens (16-19 y.o.) and youth (20-24 y.o.) there are three factors (“Confidence”, “Attractiveness”, “Consumer activity”), which determine their attitude to animation advertising. The peculiarities of young people's attitude to animation advertising with different types of graphics (2-D, 3-D, combined) and consumer motivation of this target audience are revealed. It has been identified that commercials based on the use of 3-D graphics are evaluated by representatives of the youth audience (of all age groups) most positively and often make them want to buy the products of the advertised brand. Commercials based on the use of 2-D graphics technology attract the most attention of younger teens (12-15 y.o.) and create the appropriate consumer motivation. The commercials created on the basis of the combined graphics are the least interesting to the representatives of the youth target audience. However, the ideas underlying such advertising are the most understandable for youth, and the advertising itself is perceived as relevant and evokes a sense of trust in the product and brand. The connection between the level of emotional intelligence and creativity with the peculiarities of the perception of animation advertising is revealed. Subjects with higher level of emotional intelligence rate animation graphics in advertising more positively than people with low levels of emotional intelligence. Representatives of the youth target audience (all age groups) with high levels of emotional intelligence are most sensitive to animation advertising using 3-D graphics. A similar trend is observed in subjects with a high level of creativity, rate commercials using 3-D graphics higher and perceive it more positively (compared with subjects with lower level of creativity). It is established that young teenagers (12-15 y.o.) with a high level of creativity also positively perceive animation advertising using 2-D graphics technology. Prospects for further research include a more detailed study of the perception of animation advertising with different types of graphics by different age groups, determining the relationship between the perception of animation advertising and the value-semantic sphere of the personality of consumers.

Optimum and maximum temperatures of sockeye salmon (Oncorhynchus nerka) populations hatched at different temperatures

2013 ◽  
Vol 91 (5) ◽  
pp. 265-274 ◽  
Author(s):  
Z. Chen ◽  
K. Anttila ◽  
J. Wu ◽  
C.K. Whitney ◽  
S.G. Hinch ◽  
...  
Keyword(s):  
Heart Rate ◽  
Sockeye Salmon ◽  
Incubation Temperature ◽  
Oncorhynchus Nerka ◽  
Temperature Tolerance ◽  
Development Stage ◽  
Thermal Maximum ◽  
Different Temperatures ◽  
Maximum Temperatures ◽  
The Relationship

Temperature tolerance and heart rates were compared among nine sockeye salmon (Oncorhynchus nerka (Walbaum in Artedi, 1792)) populations, whose eggs were incubated at 10, 14, and 16 °C before rearing all hatchlings at a common temperature. Critical thermal maximum (CTmax) significantly differed among populations and temperature treatments. Populations with shorter migration distance and a lower migration and spawning temperature tended to have higher CTmax at 90 days posthatch. However, the relationship was reversed when fish of similar size were compared at 135–214 days posthatch. CTmax at 90 days posthatch was also positively related to body mass, which differed appreciably among populations at this development stage. With growth, the population differences in CTmax diminished from 3.1 to 1 °C. Elevated incubation temperature also decreased CTmax. Arrhenius breakpoint temperature (ABT) for maximum heart rate differed among populations incubated at 14 °C. The Chilko Lake population, which rear at 1.2 km above sea level, had the highest heart rate across all temperatures when incubated at 14 °C, but the lowest ABT among populations. This study provides clear evidence for the local adaptation among sockeye salmon populations with respect to temperature tolerance and cardiac capacity, information that adds to the debate on whether intraspecific variance is adaptive, or a constraint, or both.

Scale analyses to estimate somatic growth in sockeye salmon, Oncorhynchus nerka

1997 ◽  
Vol 54 (3) ◽  
pp. 631-636 ◽  
Author(s):  
M Fukuwaka ◽  
M Kaeriyama
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Somatic Growth ◽  
Individual Growth ◽  
Path Coefficient ◽  
Passive Integrated Transponder ◽  
Linear Path ◽  
Absolute Growth ◽  
Back Calculation ◽  
The Relationship

The relationships between individual growth and scale pattern were examined for juvenile sockeye salmon (Oncorhynchus nerka) marked with passive integrated transponder (PIT) tags to assess the usefulness of scale analyses for estimating somatic growth. The relationship between absolute somatic growth and increment of scale radius was linear. The relationship between increment of scale radius and number of circuli was also linear. Path analysis showed that the number of circuli was directly correlated with absolute growth. A negative path coefficient (-0.200) between absolute growth and number of circuli indicated that circulus spacing was positively correlated with somatic growth. The relationship between circulus spacing and absolute growth was linear (circulus spacing ( µm) = 0.528 times absolute growth (mm) - 9.57). Results indicate that somatic growth affects circulus spacing directly. Circulus spacing was useful for comparing mean growth from the above equation, while back-calculation was useful for estimating individual growth.

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