Age estimation in common sole Solea solea larvae: validation of daily increments and evaluation of a pattern recognition technique

Close similarities have been found between the otoliths of sea-caught and laboratory-reared larvae of the common sole Solea solea (L.), given appropriate temperatures and nourishment of the latter. But from hatching to mouth formation. and during metamorphosis, sole otoliths have proven difficult to read because the increments may be less regular and low contrast. In this study, the growth increments in otoliths of larvae reared at 12 degrees C were counted by light microscopy to test the hypothesis of daily deposition, with some results verified using scanning electron microscopy (SEM), and by image analysis in order to compare the reliability of the 2 methods in age estimation. Age was first estimated (in days posthatch) from light micrographs of whole mounted otoliths. Counts were initiated from the increment formed at the time of month opening (Day 4). The average incremental deposition rate was consistent with the daily hypothesis. However, the light-micrograph readings tended to underestimate the mean ages of the larvae. Errors were probably associated with the low-contrast increments: those deposited after the mouth formation during the transition to first feeding, and those deposited from the onset of eye migration (about 20 d posthatch) during metamorphosis. SEM failed to resolve these low-contrast areas accurately because of poor etching. A method using image analysis was applied to a subsample of micrograph-counted otoliths. The image analysis was supported by an algorithm of pattern recognition (Growth Demodulation Algorithm, GDA). On each otolith, the GDA method integrated the growth pattern of these larval otoliths to averaged data from different radial profiles, in order to demodulate the exponential trend of the signal before spectral analysis (Fast Fourier Transformation, FFT). This second method both allowed more precise designation of increments, particularly for low-contrast areas, and more accurate readings but increased error in mean age estimation. The variability is probably due to a still rough perception of otolith increments by the GDA method, counting being achieved through a theoretical exponential pattern and mean estimates being given by FFT. Although this error variability was greater than expected, the method provides for improvement in both speed and accuracy in otolith readings.

Heb. U. (Hebrew University) - Opening Ceremony

Digital image

Official Opening Ceremony

Dr. Gibson addresses the audience at the official opening ceremony at the Glenridge Campus.

Thorold Tunnel opening ceremony photographs, September 18,1968.

Construction on the Thorold tunnel began in 1965 and was completed in 1967. It was designed by H. G. Acres & Company Ltd. and built by Pitts-Atlas, a joint venture of C.A. Pitts, General Contractor Ltd., and Atlas Construction Company Ltd. The tunnel replaced two lift bridges (Bridge 9 at Ontario Paper Co. and Bridge 7) that carried traffic over the Welland Canal. The majority of the construction occurred during the winter months, when the canal was closed to shipping. The water was drained and concrete sections shaped liked tubes were poured, creating the tunnel. During the summer months, the end sections of the tunnel were constructed so that shipping could continue uninterrupted. The 24 million dollar project was financed jointly by the Department of Highways and the St. Lawrence Seaway Authority. The tunnel was officially opened on September 18, 1968.

Tea ceremony and Sukiya : negating social hierarchy

There is a widely held view that architecture is very strongly and even primarily determined by the society and culture rather than geographical, technical, economic or cli-matic factors. This is especially evident in societies where rituals, customs and tradition play a significant role in the design of built forms. One such society was that of Feudal Japan under the rule of samurai warriors. The strictly controlled hierarchical society of Feudal Japan, isolated from the rest of the world for over 250 years, was able to develop the art and architecture borrowed from neighboring older cultures of China and Korea into what is now considered uniquely Japanese. One such architecture is the Sukiya style tea houses where the ritual of tea ceremony took place. This ritual was developed by the tea masters who were Zen monks or the merchants who belonged to the lowest class in the hierarchical feudal society. The Sukiya style developed from 14th to 16th century and became an architectural space that negated all the rules imposed on commoners by the samurai rulers. The tea culture had a major influence on Japanese architecture, the concept of space and aesthetics. It extended into the design of Japanese gardens, clothes, presentation of food, and their manners in day to day life. The focus of this paper is the Japanese ritual of tea ceremony, the architecture of the tea house it inspired, the society responsible for its creation and the culture that promoted its popularity and its continuation into the 21st century.

Origins of the Anzac Dawn ceremony : spontaneity and nationhood

Three separate claims to originating the dawn service – a core element of the Australian Anzac Day ritual and sense of Australian national identity – circulate persistently in contemporary Australian culture. This article offers a critical comparative analysis of these claims, examining in particular the complex interactions between official and lay narratives as part of regional and state identity politics, conventions establishing validity and worth, and the ways in which these narratives incorporate and enable multiple origins. In the process it becomes clear that multiple narratives of origin are vital to a strong sense of spontaneous national identity.

Science Complex Opening

Dr. Earp unveils a sign at the joint Science Complex opening ceremony and the Academic Staging Building renaming ceremony. The Academic Staging Building was henceforth called the Mackenzie Chown Complex.

Science Complex Opening

Dr. Alan Earp speaks at the opening ceremony for the Science Complex addition in 1984.

Science Complex Opening

Rather then cutting a piece of red tape with scissors, the Science students at Brock prepared a laser devise to cut through a specially made piece of metallic ribbon for the opening ceremony of the Science Complex addition. Pictured here is Robert Welch with the laser device as he attempts to 'cut' the tape. Unfortunately the device failed and Dr. Earp resorted to cutting the tape with a Swiss Army knife he had on hand.

La cérémonie du Bounty Day : l’histoire des révoltés du Bounty comme récit fondateur sur les îles de Pitcairn et Norfolk et ses représentations en Occident

Cette étude s’attache à analyser deux performances symboliques ayant cours sur les îles de Pitcairn et de Norfolk dans le Pacifique Sud. Les habitants de ces deux îles séparées par 6000km de distance partagent tout d’abord un événement historique ayant eu lieu en 1789, la révolte du Bounty, rendue célèbre par des réalisations cinématographiques hollywoodiennes et de nombreux ouvrages ; et également un rattachement à cette histoire et à leur filiation avec ces mutins qui prennent forme dans une performance annuellement répétée qu’ils nomment : le Bounty Day. Ici, nous verrons comment l’identité émerge de la manipulation de faits historiques, pour saisir non seulement l’importance du processus de construction identitaire, mais comment cette macro-identité influence certains aspects du micro-vécu. « L’histoire », dans l’analyse qui sera proposée, est un domaine rhétorique et un ensemble de valeurs qui lient les individus non seulement à un monde oublié mais à un monde invisible, à l’Autre lointain, inconnu et donc potentiellement menaçant.

Battlefield tourism - Anzac day commemorations at Gallipoli : an empirical analysis

This thesis used theoretical constructs of personal values, emotions, motives, event components of ceremony, transport and amenities to develop an empirical model that provided an understanding of the experiential components of the event and the antecedents associated with attendance, satisfaction and recommending behaviour of the Anzac Day Ceremonies at Gallipoli.

Illinois Tree City USA conference/awards ceremony.

The goal of the Tree City USA Program and the IDNR Urban and Community Forestry Program is to encourage local communities to establish and uphold local community forestry programs for the purpose of citizen safety and community forest management.

Illinois Tree City USA conference/awards ceremony : trees count.

The goal of the Tree City USA Program and the IDNR Urban and Community Forestry Program is to encourage local communities to establish and uphold local community forestry programs for the purpose of citizen safety and community forest management.

Illinois Tree City USA conference/awards ceremony : emerald ash borer exclusive.

The goal of the Tree City USA Program and the IDNR Urban and Community Forestry Program is to encourage local communities to establish and uphold local community forestry programs for the purpose of citizen safety and community forest management.

Illinois Tree City USA : conference/awards ceremony : Managing the urban forest from inner city to outer edge.

The goal of the program is to encourage local communities to establish local community forestry programs and focus on continual growth and improvement of their local programs.