Tag retention, survival and growth of marron Cherax tenuimanus (Crustacea:Decapoda) marked with coded micro wire tags

2007 ◽  
Vol 58 (11) ◽  
pp. 1044 ◽  
Author(s):  
Martin de Graaf
Keyword(s):  
Sustainable Management ◽  
Carapace Length ◽  
Control Groups ◽  
Natural Conditions ◽  
Growth And Survival ◽  
Tag Retention ◽  
Tag Loss ◽  
Laboratory Trial ◽  
Survival And Growth ◽  
And Control

Detailed information on the growth and survival of small, juvenile crustaceans during the earliest part of their benthic life is rare. Tagging crustaceans is difficult; external tags can be lost during moulting, negatively effect growth, and owing to their size can only be used in larger (>50 mm carapace length) (sub)adult individuals. To evaluate the suitability of small internal, coded micro wire tags (<1 mm) to mark marron, Cherax tenuimanus, a laboratory trial was conducted to compare growth and survival of juvenile (<20 mm orbital-carapace length) marked and unmarked marron. After 394 days no significant differences in growth or survival were observed between tagged and control groups. Mortality was high (~80%) but similar between both treatments. Tag loss, ~12% between Day 1 and Day 54, appeared to be confined to the first post-tag moult. No further tag loss was observed during the remaining 340 days of the experiment. Mark–recapture programs could provide the first detailed estimates of growth and survival of C. tenuimanus under natural conditions, enhancing the sustainable management of the declining recreational marron fishery. The present study illustrates the potential usefulness of coded micro wire tags as a tool in crustacean biology and fisheries management.

Tag Retention of the Spot Prawn, Pandalus platyceros, Injected With Coded Wire Tags

1977 ◽  
Vol 34 (11) ◽  
pp. 2196-2199 ◽  
Author(s):  
Earl F. Prentice ◽  
John E. Rensel
Keyword(s):  
Key Words ◽  
Carapace Length ◽  
Needle Insertion ◽  
Behavioral Changes ◽  
Control Group ◽  
Growth And Survival ◽  
Tag Retention ◽  
Pandalus Platyceros ◽  
Spot Prawn ◽  
Coded Wire Tags

Juvenile spot prawns, Pandalus platyceros (initial carapace length 15.0–22.5 mm), were successfully tagged with Bergman–Jefferts coded wire tags in the thoracic sinus. Tagged prawns, prawns subject to tagging needle insertion but without tags, and a control group were tested. No significant differences in growth and survival within or between test groups occurred and no behavioral changes were observed among tagged animals. All tagged prawns molted at least twice during the 6-mo experiment. Average tag retention was 95%. Key words: Pandalus platyceros, tagging, tag retention, molting, survival

scholarly journals Formation of artistic and aesthetic culture of students in rural social environment

2021 ◽  
Vol 97 ◽  
pp. 01025
Author(s):  
G.V. Artaeva ◽  
Ya.B. Appaeva ◽  
I.V. Kyunkrikova ◽  
A.S. Mutyrova ◽  
I.V. Shovgurova ◽  
...  
Keyword(s):  
Social Environment ◽  
Positive Impact ◽  
Rural Society ◽  
Cultural Development ◽  
Control Groups ◽  
Natural Conditions ◽  
Rural And Urban ◽  
Aesthetic Sense ◽  
Culture Formation ◽  
And Control

The article deals with a study of the problem of artistic and aesthetic culture formation in students in rural social environment. Presented in the article are the results of an empirical study that reveals the levels of formation of artistic and aesthetic culture in rural schoolchildren. A hypothesis was tested, that the levels and criteria of artistic and aesthetic culture are associated with factors of the rural social environment, such as life and traditions of their village, as well as natural conditions. Students of two schools, rural and urban, took part in the experiment. Different ages of students were represented in the composition of the experimental and control groups. It has been demonstrated that rural social environment has a positive impact on the development of artistic and aesthetic sense, emotional and sensory perception, appreciative attitude to nature and ancestral cultural heritage, as well as on the development of aesthetic norms and preferences. The results of students’ creative work, reflected in decorative and applied activities, are also the indicators of artistic and aesthetic culture formation of students and have a connection with rural society. Artistic and aesthetic culture of students in rural social environment is the result of holistic socio-cultural development.

scholarly journals Comparison of growth performance between cryopreserved and fresh sperm-originated fry of Barbonymus gonionotus

1970 ◽  
Vol 7 (1) ◽  
pp. 145-149 ◽  
Author(s):  
F Rahman ◽  
MRI Sarder ◽  
MA Rouf
Keyword(s):  
Growth Performance ◽  
Egg Yolk ◽  
Citrate Solution ◽  
Control Groups ◽  
Significant Difference ◽  
Cryopreserved Sperm ◽  
Survival And Growth ◽  
And Control ◽  
Silver Barb ◽  
Glass Aquarium

This experiment was conducted to compare the growth performance of silver barb fry produced from cryopreserved sperm with those produced from fresh sperm. Cryopreserved sperm used for fry production was preserved with three extenders, Alsever's solution, urea egg-yolk, egg-yolk citrate solution and one cryoprotectant, DMSO. Cryodiluents were prepared by mixing the cryoprotectants at 10% concentration of the extender (% v/v). Fry produced with fresh sperm was considered as control. For comparing the growth, 60 fry of 15 day-old for each treatment of both cryopreserved and control groups were stocked to glass aquarium (50 cm x 30 cm x 28 cm) and reared them for ten weeks. Growth of fry in terms of length and weight increment in both cryopreserved and control groups were measured weekly. The growth pattern was more or less similar for all the treatments and there was no significant difference (P>0.05) between them. The survival rate of fry produced from cryopreserved sperm was 82.3% and that from fresh sperm 88%, and there was no significant difference (P>0.05) between two groups. It is therefore, concluded that the use of cryopreserved sperm does not impair survival and growth of fry. Keywords: Silver barb; Cryopreservation; Growth; Survival DOI: 10.3329/jbau.v7i1.4977 J. Bangladesh Agril. Univ. 7(1): 145-149, 2009

scholarly journals Behaviour and production of fattening rabbits in colony cages, with and without environmental enrichment

2017 ◽  
Vol 56 (4) ◽  
pp. 301 ◽  
Author(s):  
E. LUZI ◽  
P. A. MARTINO ◽  
M. VERGA
Keyword(s):  
Environmental Enrichment ◽  
Feeding Activity ◽  
Video Recording ◽  
Daily Weight Gain ◽  
Control Group ◽  
Induce Stress ◽  
Control Groups ◽  
Natural Conditions ◽  
Cage Size ◽  
And Control

In intensive rabbit husbandry systems animals are usually housed in 2 place-cages without any kind of environmental enrichment. This system may induce stress due to boredom. To reduce stress, both colony cages and the presence of something to gnaw inside the cage may be useful. The aim of this research was to test the effect of environmental enrichment (presence of a piece of wood inside the cage) on performance and health of fattening rabbits, i.e. presence of body injuries. This trial has been carried out in a commercial farm, located in Northern of Italy (Piemonte region), during the summer of year 2002. The ventilation and the photoperiod were under natural conditions. Animals were housed in colony cages (12 cages, 8 animals per cage; cage size: 50x120x40 cm; density: 0.750 cm2 per animal) in semi plain-air conditions. Animals' behaviour was video-recorded during 72 hours (24 hours for 3 days) at 55, 70 and 83 days of age. The video recording covered 48 rabbits for each treatment: environmental enrichment and control group. Animals were weighted at 55, 70, 85 days; the carcass weight and yield were also analysed. Daily weight gain (49.6±2.7g vs 46.18±5.6g) and weight at slaughtering (2973.18±34.09g vs 2834.68±34.45g, P<0.01) were heavier in enriched cages than in control groups. The carcass yield was not different between the groups (62.2%); no injuries were detected on the carcass surface during the slaughter processing on both the environmental and control groups. In the first period (55 days of age) the enriched rabbits were more active than the control ones; in detail, the behaviours lying and lying stretched were significandy lower (P<0.001 and P<0.05, respectively). Furthermore, the enriched rabbits showed a trend to a better feeding activity, maybe linked to a total higher activity. In the second (70 days of age) and third period (83 days of age) the enriched rabbits showed higher feeding behaviour and caecotrophy levels (P<0.05). In the present research, the results show that to give rabbits a hanging wood from the cage ceiling may improve their biological functioning and increase their growth rate without deteriorate their health status. As regards the behaviour of rabbit caged, the results showed that the environmental enrichment might affect their behaviour and increase their welfare.

Conjugated Linoleic Acid Causes a Marked Increase in Liver α-Tocopherol and Liver α-Tocopherol Transfer Protein in C57BL/6 J Mice

2010 ◽  
Vol 80 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Pei-Min Chao ◽  
Wan-Hsuan Chen ◽  
Chun-Huei Liao ◽  
Huey-Mei Shaw
Keyword(s):  
Antioxidant Enzymes ◽  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Thiobarbituric Acid ◽  
Control Group ◽  
Thiobarbituric Acid Reactive Substances ◽  
Control Groups ◽  
Protein Levels ◽  
Transfer Protein ◽  
And Control

Conjugated linoleic acid (CLA) is a collective term for the positional and geometric isomers of a conjugated diene of linoleic acid (C18:2, n-6). The aims of the present study were to evaluate whether levels of hepatic α-tocopherol, α-tocopherol transfer protein (α-TTP), and antioxidant enzymes in mice were affected by a CLA-supplemented diet. C57BL/6 J mice were divided into the CLA and control groups, which were fed, respectively, a 5 % fat diet with or without 1 g/100 g of CLA (1:1 mixture of cis-9, trans-11 and trans-10, cis-12) for four weeks. α-Tocopherol levels in plasma and liver were significantly higher in the CLA group than in the control group. Liver α-TTP levels were also significantly increased in the CLA group, the α-TTP/β-actin ratio being 2.5-fold higher than that in control mice (p<0.01). Thiobarbituric acid-reactive substances were significantly decreased in the CLA group (p<0.01). There were no significant differences between the two groups in levels of three antioxidant enzymes (superoxide dismutase, glutathione peroxidase, and catalase). The accumulation of liver α-tocopherol seen with the CLA diet can be attributed to the antioxidant potential of CLA and the ability of α-TTP induction. The lack of changes in antioxidant enzyme protein levels and the reduced lipid peroxidation in the liver of CLA mice are due to α-tocopherol accumulation.

The Prospects and Risks Connected with Increasing the Level of Self-Organisation in Students

2020 ◽  
pp. 75-81
Author(s):  
Svetlana Alexandrovna Kosareva ◽  
Keyword(s):  
Higher Education ◽  
Professional Competence ◽  
Initial Level ◽  
Education Institution ◽  
Diagnostic Methods ◽  
Study Guide ◽  
Learning Approaches ◽  
Control Groups ◽  
Self Organisation ◽  
And Control

The paper describes the method for increasing the level of self-organisation in students which has been developed by the author. It also contains the method testing results and presents the prospects and risks teachers could face while applying the method in a higher education institution. The purpose of this study is to find out the prospects and risks of applying the method for increasing the level of self-organisation in students and to determine the ways of reducing the risks. Methodology. The author points out the learning approaches which were the basis of developing the method and describes diagnostic methods for determining students’ self-organisation levels. The work focused on increasing each student’s initial level consists of a theoretical and a practical part and includes project activities on creating a study guide. The results of the study. The method developed proved to be effective. It was established by diagnosing the final level of self-organisation in students in the experimental and control groups. The paper considers the advantages of the method among which there is universal character, flexibility, improvements to teacher’s and students’ professional competence, etc. At the same time it is necessary to be aware of the risks due to the increased amount of teacher’s work and the fact that students’ work within the project tends to be monotonous. In conclusion, the prospects of the method for increasing the level of self-organisation in students are related to its advantages and the final results of the work. The risks of its use can be reduced with the help of the measures proposed in the paper.

Sri Lankan Cleft Lip and Palate Study Model Analysis: Clefts of the Secondary Palate

1993 ◽  
Vol 30 (2) ◽  
pp. 227-230 ◽  
Author(s):  
Andrew Mccance ◽  
David Roberts-Harry ◽  
Martyn Sherriff ◽  
Michael Mars ◽  
William J.B. Houston
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Model Analysis ◽  
Control Group ◽  
Tooth Size ◽  
Sri Lankan ◽  
Control Groups ◽  
Secondary Palate ◽  
Comparable Control ◽  
And Control

The study models of a group of adult Sri Lankan patients with clefts of the secondary palate were investigated. Tooth-size and arch-dimension comparisons were made with a comparable control group. Significant differences were found between the cleft and control groups in tooth sizes, chord lengths, and arch widths. The cleft group dimensions were generally smaller than those of the control group. Overjets were larger in the cleft group.

THE EFFECT OF APPLYING ANIMAL CARTOON PICTURES ON STUDENTS’ ACHIEVEMENT IN WRITING NARRATIVE TEXT

2017 ◽  
Vol 6 (1) ◽  
Author(s):  
Hasanul Arifin Zul And Masitowarni Siregar
Keyword(s):  
T Test ◽  
Narrative Text ◽  
Control Group ◽  
First Year ◽  
Writing Achievement ◽  
Control Groups ◽  
Post Test ◽  
Written Test ◽  
And Control ◽  
Experimental Group

This thesis is focused on the investigation of the effect of applying animal cartoon pictures on students’ achievement in writing narrative text. This study aims to find whether applying animal cartoon pictures significantly affect the students’ writing achievement or not. The data in this study were obtained by administering a written test. The population was the 2015/2016 first year (grade XI) of SMA Swasta Nusantara Lubuk Pakam and 66 students were taken as the sample by using random sampling. The sample was divided into two groups, experimental and control groups. The experimental group was taught by applying animal cartoon pictures while the control group without animal cartoon pictures (x = lecturing). The data were taken the scores from the pre-test and post-test to both experimental and control groups. These data were analyzed by using t-test. The result of computing the t-test obviously showed that t-observed is higher than t-table (5.21 >1,67) with the degree of freedom 64 (df =N-2) at the level significance 0,05 one tail test. It showed that the application of animal cartoon pictures significantly affected the students of SMA Swasta Nusantara Lubuk Pakam achievement in writing narrative text.

THE EFFECT OF APPLYING DEMONSTRATION METHOD ON STUDENTS’ ACHIEVEMENT IN SPEAKING SKILL AT THE THIRD GRADE OF SMK PAB 3 MEDAN ESTATE

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Meryanti Napitupulu And Anni Holila Pulungan
Keyword(s):  
High School ◽  
Control Group ◽  
Vocational High School ◽  
Control Groups ◽  
Speaking Test ◽  
The Third ◽  
Speaking Skill ◽  
The Subject ◽  
And Control ◽  
Experimental Group

This study was conducted as an attempt to discover the effect of applying Demonstration Method on students’ achievement in speaking skill. It was an experimental research. The subject was students of Grade XII, Vocational High School (Sekolah Menengah Kejuruan: SMK), which consisted of 79 students. The research was divided into two groups: experimental and control groups. The instrument used to collect the data was speaking test. To obtain the reliability of the test, the writer applied Kuder Richardson 21 formula. The result of the reliability was 0.7, and it was found that the test was reliable. The data were analyzed by using t-test formula. The analysis showed that the scores of the students in the experimental group were significantly higher than the scores of the students in the control group at the level of significant m = 0.05 with the degree of freedom (df) 77, t-observed value 8.9 > t-table value 1.99. The findings indicate that using Demonstration Method significantly affected the students’ achievement in speaking skill. So, English teachers are suggested to use Demonstration Method in order to improve students’ achievement in speaking skill.

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