Procedure for Analysis of Schooling Behavior

1966 ◽  
Vol 23 (4) ◽  
pp. 547-562 ◽  
Author(s):  
John R. Hunter
Keyword(s):  
Computer Program ◽  
Motion Picture ◽  
Motion Pictures ◽  
The Other ◽  
Laboratory Studies ◽  
Jack Mackerel ◽  
Schooling Behavior ◽  
A Value ◽  
Influence Of Food ◽  
Picture Frame

A method for the analysis of schooling behavior applicable to field and laboratory studies is presented. Three indices were developed to measure the behavior of a school, from motion pictures. Two of the indices are measures of the distance among individuals in a school, and the other is a measure of the differences in orientation among the individuals. A value for each index was calculated for each motion-picture frame analyzed. A coordinate reader and digitizer used to analyze films permitted the operator to record automatically on IBM cards the X and Y coordinates for the positions of the head and tail of each fish in a frame. A computer program was written to calculate the three indices from the coordinates, to convert the measurements to actual distance, and to make statistical comparisons.Laboratory experiment on the influence of food deprivation on schooling behavior of juvenile jack mackerel, Trachurus symmetricus (Ayres) indicated: schools became compact immediately after feeding; the intervals among fish expanded during a deprivation period; and differences in orientation were related to the size of the individuals.

Effects of Light on Schooling and Feeding of Jack Mackerel, Trachurus symmetricus

1968 ◽  
Vol 25 (2) ◽  
pp. 393-407 ◽  
Author(s):  
John R. Hunter
Keyword(s):  
Motion Picture ◽  
Nearest Neighbor ◽  
Motion Pictures ◽  
Separation Distance ◽  
The Other ◽  
Angular Deviation ◽  
Jack Mackerel ◽  
A Value

Schools of six jack mackerel each were photographed with infrared film at eight levels of luminance and also in darkness. Three indices were used to measure the behavior of the school from motion pictures. Two of the indices, mean distance to nearest neighbor and mean separation distance, were measures of the distances between individuals in a school; the other, mean angular deviation, was a measure of differences in orientation between individuals. A value for each index was calculated for each motion picture frame.From 12.1 to 6 × 10−6 ft-L no differences existed in the angular deviation of the school or in the distances between fish. At 6 × 10−7 ft-L the intervals between fish were much larger than at higher levels of brightness and groups showed little uniformity in their orientation. Below 6 × 10−7 ft-L (darkness) schools were dispersed and the distributions of values of angular deviation were random.The ability of jack mackerel to feed on live adult Artemia was also tested at eight levels of luminance and in darkness. The number of Artemia eaten at 6 × 10−5 ft-L was about half of that eaten at the normal daytime level of 12.1 ft-L. Few Artemia were eaten at 6 × 10−7 ft-L and none in darkness.Comparison of these data with measurements of light in the sea indicated that jack mackerel probably would be able to maintain schools near the surface on a moonless starlit night and that they probably could feed effectively near the surface on a full moonlight night.

1905–1908

2021 ◽  
pp. 31-57
Author(s):  
Andrew A. Erish
Keyword(s):  
Motion Picture ◽  
Motion Pictures ◽  
The Other ◽  
Full Time ◽  
Stock Company ◽  
Individual Values ◽  
The World ◽  
Time Basis

Chapter Two covers Vitagraph's return to production on a full-time basis, which began with relocating its studio from a rooftop in Manhattan to a purpose-built facility in Brooklyn. The new glass-roofed studios enabled year-round production, necessitating the establishment of a stock company of players and writer-directors. Blackton and Smith devised a system whereby each would oversee production units that reflected their individual values and approach to cinema. This coincided with the explosive growth of nickelodeon theatres across America. Vitagraph opened a distribution office in Chicago, as well as sales offices in London and Paris, to become the most popular producer of motion pictures in much of the world. During this time Blackton applied his talent as an illustrator to create motion picture animation. The chapter concludes with Vitagraph and the other pioneer filmmakers being forced to join Edison's Motion Picture Patents Company in order to remain in business.

Effect of Catfish Bone Paste on the Properties of Steamed Bread

2014 ◽  
Vol 881-883 ◽  
pp. 757-760
Author(s):  
Xiao Qing Ren ◽  
Li Zhen Ma ◽  
Xin Yi He
Keyword(s):  
Weight Loss ◽  
Specific Volume ◽  
Cell Structure ◽  
The Other ◽  
Gas Cell ◽  
A Value ◽  
Crumb Structure ◽  
Steamed Bread ◽  
Different Levels ◽  
Structure Properties

The objective of this study was to examine the effect of different levels of catfish bone paste to flour on the physicochemical, textural and crumb structure properties of steamed bread. Six different levels (0, 1, 3, 5, 7,10 %) of catfish bone paste to flour were used in the formulation of the steamed bread. The results showed that the weight loss and TTA of steamed bread decreased with an increase in the levels of the catfish bone paste. On the other hand, the pH increased with an increase in the levels of the catfish bone paste. The specific volume, hardness, chewiness and gas cell structure in the crumb of steamed bread with catfish bone paste at 5% supplementation level were better. Thus, a value of 5% catfish bone paste was considered a better level for incorporation into the steamed bread.

Effects of Motion Picture Frame Rate on Material and Texture Appearance

2020 ◽  
pp. 1-12
Author(s):  
Robert S. Allison ◽  
Yoshitaka Fujii ◽  
Laurie M. Wilcox
Keyword(s):  
Motion Picture ◽  
Frame Rate ◽  
Picture Frame

scholarly journals Spontaneous deformation of protocatechuic acid crystals

1949 ◽  
Vol 197 (1050) ◽  
pp. 283-294 ◽  
Keyword(s):  
Protocatechuic Acid ◽  
Motion Pictures ◽  
Extensive Study ◽  
The Other ◽  
Three Dimensions ◽  
Stable Configuration ◽  
Unique Case ◽  
The Past ◽  
Spontaneous Deformation ◽  
Lattice Planes

In this paper an extensive study is reported of the very remarkable, and thus far apparently unique, case of the deformation in three dimensions of protocatechuic acid, to which attention was drawn many years ago by Otto Lehmann. The deformations are spontaneous, and are probably due to progressive gliding of the lattice planes, which exist in two configurations, one stable and the other unstable, the latter being the condition of the long prismatic rods when they first form. Such a prism presently deforms into a zigzag crystal, with stable and unstable sections in alternation which, with continuation of the deformation, becomes again straight, but now in the stable configuration. The bending is progressive, like that of an umbrella case, pendant from the end of an oblique cane pointed down, when the latter is pushed into it. The movements are so rapid that motion pictures, made with a microscope, were necessary for the observation of certain stages of the deformation. The deformations have been shown to many chemists and physicists during the past decade or more, none of whom had ever seen or heard of this remarkable type of crystal movement. The deformations are usually observed as the warm saturated solution cools, but they also occur after the crystal has been dried for many hours.

A field study of reproductive interactions in Bosca's newt, Triturus boscai

1995 ◽  
Vol 16 (4) ◽  
pp. 357-374 ◽  
Author(s):  
Manuel Mouta Faria
Keyword(s):  
Field Study ◽  
Natural Population ◽  
Wild Population ◽  
Short Circuit ◽  
The Other ◽  
Courtship Behaviour ◽  
Laboratory Studies ◽  
Free Living ◽  
Spermatophore Transfer ◽  
Sexual Interference

AbstractObservations of a free-living population of Bosca's newt, Triturus boscai, show that courtship behaviour in nature is similar to the behaviour observed in earlier laboratory studies. Complementary evidence was obtained on the behaviour called flick, which is sometimes inserted at the end of the static display phase, and may be viewed as an equivalent behaviour to the retreat display of the other small-bodied newt species. Sexual interference in the natural population was mainly caused by males. Two characteristic male behaviour patterns were recognised, the waiting position and the push-tail. Females tend to withdraw from situations of interference. Courtship sequences solely consisting of orientation and spermatophore transfer phases, so-called short-circuit sequences, may be interpreted as a male strategy to avoid the very severe male-to-male interference that exists in a wild population.

Influence of Food and Larval Age on the Defensive Chemistry of Satumia pyri

2001 ◽  
Vol 56 (1-2) ◽  
pp. 89-94 ◽  
Author(s):  
Reinhold Deml
Keyword(s):  
Body Fluids ◽  
The Other ◽  
Larval Diet ◽  
Larval Instars ◽  
Defensive Chemistry ◽  
Crataegus Monogyna ◽  
Secondary Compound ◽  
Influence Of Food ◽  
The One ◽  
The Given

Abstract Scolus secretions and hemolymph of caterpillars of Satumia pyri fed with two different foodplants (Crataegus monogyna, Prunus spinosa) were chemically analyzed and their chemical similarities determined. The secondary-compound patterns obtained for the two body fluids showed no significant differences when compared between the two groups of alterna­ tively fed last-instar larvae. Thus, the composition of these fluids of full-grown caterpillars is not influenced by the larval diet. However, younger larvae on P. spinosa revealed a diversity of compounds differing significantly from that of larger caterpillars fed with either C. mono­gyna (both body fluids) or P. spinosa (hemolymph only). This indicates that, on the one hand, the hemolymph composition is adapted to the changing physiological requirements of the given instars whereas, on the other hand, the defensive mixtures remain unaltered in the late larval instars due to a constant spectrum of potential enemies.

scholarly journals Lipid composition of the brains of she-goat and castrated goat consumed in Ekiti State, Nigeria

2015 ◽  
Vol 50 (2) ◽  
pp. 153-162 ◽  
Author(s):  
EI Adeyeye ◽  
AJ Adesina
Keyword(s):  
Fatty Acids ◽  
Gas Chromatography ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Linear Correlation ◽  
The Other ◽  
A Value ◽  
Significant Difference ◽  
Value Range ◽  
Goat Brain

The levels of fatty acids, phospholipids and sterols were determined in the brains of she-goat and castrated goat found in Ekiti State, Nigeria by gas chromatography. Results showed that the crude fat levels were 9.98 and 10.2 % in the brains of she-goat and castrated goat respectively. The fatty acid composition of she-goat and castrated goat brain shows that the SFA was 40.6 and 42.7 %, MUFA was 37.1 and 38.7 % and PUFA was 20.9 and 22.3% respectively. The other parameters of she-goat and castrated goat brain were found: PUFA/SFA, 0.490 and 0.548; MUFA/SFA, 0.869 and 0.953; n-6/n-3, 0.775 and 11.7; LA/ALA, 0.876 and 28.0; AA/DGLA, 6.05 and 17.4; EPA/DHA, 1.00 and 5.89 and EPSI (PUFA/MUFA), 0.564 and 0.575 respectively. Phospholipids were present in she-goat and castrated goat with a value range of 2365 and 3047 mg/100g respectively. Among the sterols, only cholesterol was of any significant level with values of 1353 mg/100g (she-goat brain) and 1355 mg/100g (castrated goat brain). Linear correlation at ? = 0.05, df: n-1 showed that no significant difference exists between the crude fats, phospholipids and sterols except in the fatty acids parameters.Bangladesh J. Sci. Ind. Res. 50(2), 153-162, 2015

scholarly journals Handüzü Yaylasının Botanik Kompozisyonu Üzerine Bir Çalışma

2019 ◽  
Vol 7 (9) ◽  
pp. 1339 ◽  
Author(s):  
Adil Bakoğlu ◽  
Hüseyin Baykal ◽  
Muhammed İkbal Çatal
Keyword(s):  
Canopy Cover ◽  
Research Area ◽  
The Other ◽  
Botanical Composition ◽  
Nardus Stricta ◽  
A Value ◽  
Pasture Quality ◽  
Vegetation Characteristics ◽  
Composition Ratios

In this study, which was carried out in 2018, some vegetation characteristics of Handüzü plateau which was connected to Güneysu district of Rize province was determined by using Lup method. Canopy cover and botanical composition ratios and pasture status class were investigated in the study. As a result of the study, 4 grasses, 4 legume and 33 other family plants were identified. The rate canopy covering of the research area was 82.40%, the rate of grasses in the botanical composition was 33.37%, the rate of the legumes was 5.75% and the ratio of the other families was 60.88%. The first three species, the most common found in pasture, respectively; Nardus stricta L. (27.00%), Carex atrata L. subsp. aterrima (Hoppe) Hartm. (11.10%) and Polygala alpestris Rchb. (8.50%). Pasture status was determined as weak with a value of 2.456% degree of pasture quality. It was concluded that especially controlled grazing and top-seeding, were applied together other methods of breeding.

Sign in / Sign up

Export Citation Format

Share Document