A Statistical Analysis of Ration and Growth Relationship of Plaice (Pleuronectes platessa)

1968 ◽  
Vol 25 (4) ◽  
pp. 717-732 ◽  
Author(s):  
Samir Zaky Rafail
Keyword(s):  
Statistical Analysis ◽  
Maximum Growth ◽  
Growth Efficiency ◽  
Growth Increment ◽  
Square Root ◽  
Daily Ration ◽  
Pleuronectes Platessa ◽  
Ration Level ◽  
Growth Increments ◽  
Relationship Of

Dawes (1930, J. Marine Biol. Assoc, 17: 103 and 877) gave extensive data on average daily rations and fortnightly growth increments of Pleuronectes platessa fed on Mytilus edulis. The data are analyzed here in an attempt to formulate a ration and growth increment relationship. Fortnightly growth increments, Δw, were arranged in eight groups according to eight ranges of fish weights. The growth increments in each group, associated with each average daily ration level (R), gave evidence of the normal distribution. Each range of fish weights was characterized by a certain range of daily rations associated with growth increments having homogeneous variance, as well as by a certain daily ration, Rm, associated with maximum growth efficiency. There was evidence that growth increments, of each range of fish weights, were linearly related with [Formula: see text] such that the value of the square root is positive if R > Rm and negative if R < Rm, i.e., [Formula: see text] where a and b are parameters.

Further Analysis of Ration and Growth Relationship of Plaice (Pleuronectes platessa)

1969 ◽  
Vol 26 (12) ◽  
pp. 3237-3241 ◽  
Author(s):  
Samir Zaky Rafail
Keyword(s):  
Maximum Growth ◽  
Growth Efficiency ◽  
Growth Increment ◽  
Mean Value ◽  
Pleuronectes Platessa ◽  
Growth Increments ◽  
Power Equation ◽  
The Mean ◽  
Relationship Of ◽  
Weight Groups

Evidence is given that the average daily rations (R) and fortnightly growth increments (ΔW) of six weight groups of Pleuronectes platessa fed on Mytilus edulis are related as in the power equation ±(ΔW−ΔWm) = ±b(|R–Rm|)B. Rm is the daily ration associated with the growth increment (ΔWm) at maximum growth efficiency; b and B are parameters. The power B has a mean value of about 0.5 and shows significant deviations from the mean especially in the case of smaller fish.

Growth Increments and Geochemical Variations in the Molluscan Shell

1985 ◽  
Vol 13 ◽  
pp. 72-87 ◽  
Author(s):  
Douglas S. Jones
Keyword(s):  
Shell Growth ◽  
Maximum Growth ◽  
Growth Increment ◽  
Growth Patterns ◽  
Random Disturbance ◽  
Growth Increments ◽  
Molluscan Shell ◽  
External Shell ◽  
Periodic Growth ◽  
Geochemical Variations

Perhaps the one structural feature of the molluscan shell which has historically attracted the most attention from biologists and paleobiologists alike is the banding or growth increment variation associated with so many molluscan species. Such growth patterns are often prominently displayed on the external surfaces of shells and have long been the focus of serious biological and paleontological research (see reviews by Clark, 1974; Lutz and Rhoads, 1980). The usefulness of external shell growth patterns in ecological or paleoecological contexts is limited, however, by both the inability to distinguish true periodic features from random disturbance marks and by the extreme crowding of growth lines near the margins of mature shells. In the last two decades these problems have been surmounted with the recognition of periodic growth patterns within molluscan shells. Internal shell growth patterns are known from all classes of mollusks, but those in the Bivalvia have been studied most extensively. This is a result of the relative ease with which a complete ontogenetic growth record can be obtained by sectioning a shell along the axis of maximum growth (Rhoads and Pannella, 1970). Analogous ontogenetic records are very difficult, if not impossible, to obtain from coiled or spiral shells (e.g., gastropods) using current techniques (Lutz and Rhoads, 1980). This chapter, then, aims to review the major types of internal shell growth patterns described within molluscan shells (mainly bivalves) and to discuss their origin and applications in ecology and paleoecology. Also taken up in this chapter is a brief consideration of geochemical variations (stable oxygen and carbon isotopes and trace and minor elements) within molluscan shells. Physical-chemical, environmental, and physiological influences on shell chemistry are discussed in relation to how biogeochemical variations in the shell may be used to reconstruct paleoenvironmental conditions.

scholarly journals Investigating Relationship of Innovation and Entrepreneurship Adoption Concept and University Competitive Advantage: A Field Study

2017 ◽  
Vol 12 (7) ◽  
pp. 138
Author(s):  
Abdul Sattar H. Yousif ◽  
Firas Rifai ◽  
Hadeel Alhroot
Keyword(s):  
Higher Education ◽  
Statistical Analysis ◽  
Competitive Advantage ◽  
Statistical Test ◽  
Adoption Of Innovation ◽  
Main Instrument ◽  
The University ◽  
Relationship Of ◽  
The Relationship ◽  
Innovation And Entrepreneurship

This paper aims at investigating the relationship between the application of innovation and entrepreneurship system and the university competitive advantage in the Jordanian higher education sector.     To collect the required data, the number of some concerned individuals was surveyed through a carefully designed questionnaire that has become the main instrument to obtain the required data.A random sample of university managerial staff was withdrawn from five private Jordanian universities. The collected data was audited, reviewed and statically analyzed using the most relevant statistical test. The results of the statistical analysis have clearly pointed out that university adoption of innovation and entrepreneurship system has a significant effect on its competitive advantage.

SERUM IMMUNOGLOBULINS: I. LEVELS IN NORMAL CHILDREN AND IN UNCOMPLICATED CHILDHOOD ALLERGY

PEDIATRICS ◽  
1968 ◽  
Vol 41 (3) ◽  
pp. 600-611
Author(s):  
Rebecca H. Buckley ◽  
Susan C. Dees ◽  
W. Michael O'Fallon
Keyword(s):  
Statistical Analysis ◽  
Geometric Mean ◽  
Serum Concentrations ◽  
Normal Children ◽  
Mean Values ◽  
Serum Immunoglobulins ◽  
Normal Individuals ◽  
Contrast Analysis ◽  
Relationship Of ◽  
The Relationship

In 201 normal individuals from infancy to adulthood, serum concentrations of immunoglobulins G, A, and M are presented as geometric mean values (mg/l00 ml) and as percents of adult mean values for each of these proteins. A statistical analysis revealed a significant relationship between age and both IgG and IgA concentrations up to ages 6 and 7 years. No correlation was present between age and immunoglobulin concentrations beyond that time, suggesting that the adult concentrations of IgG and IgA are normally reached and maintained after ages 6 and 7 years. In contrast, analysis of the IgM data suggested that the adult value is reached by age 1 year. No truly significant differences were found in immunoglobulin concentrations which could be attributed to sex. Significantly higher concentrations of IgG were found in normal Negro than in normal Caucasian subjects after age 6 years, but no significant differences were found below this age for IgG or at any age for IgA and IgM. Similarly determined serum immunoglobulins in 85 allergic children, selected because they had no complicating illnesses, were compared with the normal group according to the age of the child. No significant differences were found in concentrations of either IgG or IgA. Some differences were found in IgM, but these were small and were primarily associated with the relationship of IgM to age in the allergic group.

Results of a Multicenter Study Assessing the Status of Standardization of a Recombinant Thromboplastin for the Control of Oral Anticoagulant Therapy

1994 ◽  
Vol 72 (02) ◽  
pp. 261-267 ◽  
Author(s):  
A Tripodi ◽  
V Chantarangkul ◽  
M Braga ◽  
L poller ◽  
J W ten Cate ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Oral Anticoagulant Therapy ◽  
Oral Anticoagulants ◽  
Collaborative Study ◽  
The Third ◽  
Normal Individuals ◽  
The Status ◽  
Data Points ◽  
Relationship Of ◽  
International Collaborative Study

SummaryAn international collaborative study involving 20 laboratories was undertaken to evaluate the status of standardization of a commerical recombinant thromboplastin. The results show that the reagent fulfills the WHO requirements for thromboplastin calibration against two International Reference Preparations (IRP) from different species, because there was a linear relationship of log-transformed prothrombin times as measured by the recombinant reagent and the two IRPs in normal individuals and patients stabilized on oral anticoagulants. The regression lines drawn through the patient data points passed through the normal data points in the majority of instances. The average ISI values for three different batches were close to unity. On the average, the ISI value calculated against BCT/253 (human, plain) was slightly smaller than that against RBT/79 (rabbit, plain). The between laboratory precision of calibration (CV = 5-6%) did not change whether BCT/253 or RBT/79 was used, whereas it was substantially improved when the calibrations of batches 2 and 3 were performed against batch 1, arbitrarily taken as standard (CV ≤ 1.7%). Statistical analysis to test for differences between slopes revealed no significant between-batch differences in 16 of 20 laboratories. However slight differences for the third batch (2.8% less than the average ISI value of batches 1 and 2) leave room for further improvement in the standardization of the reagent.

Analysis of the Tourism Locations of Chinese Provinces and Autonomous Regions: An Analysis Based on Cities

2014 ◽  
Vol 02 (01) ◽  
pp. 1450004
Author(s):  
Zheng WANG ◽  
Lijuan CHEN
Keyword(s):  
Information System ◽  
Statistical Analysis ◽  
Geographic Information System ◽  
Geographic Information ◽  
Gis Technology ◽  
Regional Tourism ◽  
Autonomous Regions ◽  
Relationship Of ◽  
The Relationship ◽  
Statistical Analysis Methods

Based on the data collected from cities, this paper analyzes the conditions of tourism location of provinces and autonomous regions. For the method, this paper uses Geographic Information System (GIS) technology and statistical analysis methods to try to analyze tourism geographic conditions from the relationship of tourism industrial location and Chinese arterial highway location, so as to provide a reference for the development of regional tourism.

scholarly journals Pedagogical Conditions for the Development of Self-Educational Competence of Future Specialists in the Study of Professional Subjects

2020 ◽  
Vol 9 (7) ◽  
pp. 257
Author(s):  
Hanna P. Byhar ◽  
Valentyna H. Zvozdetska ◽  
Inna S. Prokop ◽  
Iryna I. Pits ◽  
Oksana Ye. Hordiichuk
Keyword(s):  
Statistical Analysis ◽  
Professional Training ◽  
Independent Learning ◽  
Interactive Technologies ◽  
Cognitive Activities ◽  
Conducting Research ◽  
Relationship Of ◽  
The Relationship ◽  
Experimental Group ◽  
Teaching Professional

The content of the categories “self-education”, “self-educational competence” is analysed. The need for the development of self-educational competence of future specialists in the process of studying professional subjects is actualized. The pedagogical conditions for the formation of self-educational competence of future specialists in the study of professional subjects are determined. Such factors include: motivational and value attitude of future specialists to independent learning and cognitive activities in the process of professional training; ensuring the relationship of all areas of professional training of future specialists (theoretical, methodological, practical), which involves the formation of self-educational competence; development and implementation of educational and methodological support for the development of self-educational competence of students; the use of interactive technologies in teaching professional subjects to build educational dialogue. An experimental verification of the effectiveness of implementation of certain pedagogical conditions. For this purpose, a pedagogical experiment was organized. The conclusion that students of control and experimental groups have significant differences due not to random factors, but to a certain natural reason - conducting research and experimental work on the implementation of pedagogical conditions for the development of self-educational competence of future specialists in the study of professional subjects. Statistical analysis of indicators of transition of students to a higher level of self-educational competence shows that the process of formation of self-educational competence in students of the experimental group is more effective than in students of the control one.

Growth rhythms in the brachiopod Rafinesquina alternata from the Late Ordovician of southeastern Indiana

Paleobiology ◽  
1982 ◽  
Vol 8 (4) ◽  
pp. 389-401 ◽  
Author(s):  
Gary D. Rosenberg
Keyword(s):  
Nutrient Supply ◽  
Growth Increment ◽  
Late Ordovician ◽  
The Moon ◽  
Future Studies ◽  
Growth Increments ◽  
True Number ◽  
Environmental Setting ◽  
Lower Amplitude ◽  
Shallow Subtidal

Growth rhythms are described in the accretionary skeletons of Rafinesquina alternata, a Late Ordovician brachiopod from southeastern Indiana. Contiguous growth increments widen and narrow in repeating series, giving the appearance of adjacent clusters of increments. Fourier analyses of growth increment widths and counts of the number of increments within individual clusters yield similar periodicities. Increments vary in width over a period of approximately 19 increments, modulated with a lower amplitude oscillation of 27 increments. The number of increments per cluster falls into two groups; clusters having between 8 and 17 increments outnumber those having between 18 and 30 increments.All specimens were obtained from a Maysvillian facies of the Dillsboro Formation, previously inferred to represent a shallow subtidal environmental setting. The growth periodicities described here are consistent with this interpretation. The intensity of tidal parameters such as emersion-immersion cycles, substrate shifts, changes in nutrient supply or in oxygen tension declines with depth as would the number of growth increments added each month in response to these factors. Thus, for these specimens, the maximum number of increments per cluster probably approximates the true number of “tidal” days in the Late Ordovician synodic month (period between full moons).The paleoecological model derived from these analyses can be used in future studies to predict the rate of the earth's rotation and the motion of the moon in the Late Ordovician and, equally importantly, to evaluate the limits of uncertainty of such studies.

Comparaison de la croissance d'espèces ligneuses en milieu ouvert et sous couvert forestier

1983 ◽  
Vol 13 (3) ◽  
pp. 508-513 ◽  
Author(s):  
P. Bellefleur ◽  
G. LaRocque
Keyword(s):  
Sugar Maple ◽  
Growth Increment ◽  
The Other ◽  
Yellow Birch ◽  
Full Sunlight ◽  
Growth Increments

The objective of this paper is to compare growth increment between full sunlight conditions and moderately shaded conditions for seedlings of three species: sugar maple (Acersaccharum Marsh.), yellow birch (Betulaalleghaniensis Britton), and beech (Fagusgrandifolia Ehrh.). Diameter and height increments were larger in full sunlight than under cover. Yellow birch has shown better growth increments than sugar maple and beech under both conditions. This suggests that shaded conditions are not as limiting for the establishment of yellow birch than for the other two species.

Age estimation for young bowhead whales (Balaena mysticetus) using annual baleen growth increments

2008 ◽  
Vol 86 (6) ◽  
pp. 525-538 ◽  
Author(s):  
S. C. Lubetkin ◽  
J. E. Zeh ◽  
C. Rosa ◽  
J. C. George
Keyword(s):  
Growth Parameters ◽  
Age Determination ◽  
Population Level ◽  
Exponential Model ◽  
Growth Increment ◽  
Balaena Mysticetus ◽  
Nonlinear Mixed Effects Model ◽  
Bowhead Whales ◽  
Growth Increments ◽  
Age Estimates

We compiled age estimates and baleen plate δ13C data from 86 bowhead whales ( Balaena mysticetus L., 1758). We used previous whale age estimates based on aspartic acid racemization (AAR) and corpora counts to extend the use of δ13C data for age determination from cycle counting to a modified exponential model using annual baleen growth increments. Our approach used the growth increment data from individual whales in a nonlinear mixed effects model to assess both population-level and whale-specific growth parameters. Although age estimates from baleen-based models become less precise as the whales age, and baleen growth and length near steady state, the growth increment model shows promise in estimating ages of bowhead whales 10–13.5 m long with baleen lengths <250 cm, where other techniques are less precise or the data are scarce. Ages estimated using the growth increment data from such whales ranged from 6.4 to 19.8 years.

Sign in / Sign up

Export Citation Format

Share Document