Long-term effects of two sizes of surgically implanted acoustic transmitters on a predatory marine fish (Pomatomus saltatrix)

2009 ◽  
Vol 60 (2) ◽  
pp. 183 ◽  
Author(s):  
Eva B. Thorstad ◽  
Sven E. Kerwath ◽  
Colin G. Attwood ◽  
Finn Økland ◽  
Christopher G. Wilke ◽  
...  
Keyword(s):  
Growth Rate ◽  
Specific Growth Rate ◽  
Specific Growth ◽  
The Body ◽  
Control Group ◽  
Fish Behaviour ◽  
Long Term Effects ◽  
Pomatomus Saltatrix ◽  
Tag Retention

Fish telemetry is increasingly used to study fish behaviour in marine systems and it is crucial that the tagging does not affect fish behaviour and welfare negatively. Hence, the long-term effects of surgically implanted acoustic telemetry transmitters on survival, tag retention, healing and growth on Pomatomus saltatrix (known as tailor in Australia, elf in South Africa and bluefish in North America) were studied over 144 days. P. saltatrix are well suited for transmitter implants because no tagging-related short- or long-term mortality or transmitter expulsion was recorded. Small transmitters (9 × 28 mm, 3.3 g in water) did not affect the specific growth rate of tagged fish compared with an untagged control group. In contrast, the fish tagged with large transmitters (13 × 50 mm, 6.9 g in water) had a reduced specific growth rate. The small, but not the large transmitter, seemed suitable for tagging P. saltatrix of the body sizes represented in this study (215–621 g). The specific growth rate was negatively affected by increasing the transmitter-mass-in-water to body-mass ratio. It is recommended that this ratio should not exceed 1.4%.

scholarly journals COMPENSATORY GROWTH OF Oreochromis niloticus SELECTED STRAIN FROM BOGOR, WEST JAVA

2017 ◽  
Vol 12 (2) ◽  
pp. 53
Author(s):  
Vitas Atmadi Prakoso ◽  
Kurniawan Kurniawan
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Specific Growth Rate ◽  
Compensatory Growth ◽  
Specific Growth ◽  
The Body ◽  
The Other ◽  
Control Group ◽  
Feeding Management ◽  
Effective Strategies

Inefficient feed management strategy in aquaculture will increase the fish production cost. One of the most effective strategies to solve this problem is through a better understanding of the compensatory growth of cultured fish. O. niloticus BEST tilapia strain (total length: 7.23 ± 0.11 cm mean ± SD; Body weight: 7.04 ± 0.08 g mean ± SD) were reared in aquariums at 26.3 ± 1.4oC for 10 weeks. During the experiment, the control group was fed twice a day. The other two groups were deprived of food for one and two weeks and then fed twice a day during refeeding period. At the end of the experiment, the fish deprived for one week had a body weight, biomass and specific growth rate that were not significantly different from the control group. The body weight, biomass and specific growth rate of fish deprived for two weeks were significantly lower than the other groups. This study revealed that concentrations of ash and lower concentrations of protein and lipid on the deprived groups were higher compared to those without feed deprivation. Mortality of fish was lower than 9% and not significantly different among the treatments. Fish aggressive behavior was the main reason for injuries and death. Given the results, BEST tilapia strain was only able to reach complete growth compensation not longer than one week deprivation period. The results of the present study could be applied as basic information for further research on feeding management of BEST tilapia strain. 

Long-term effects of different-sized surgically implanted acoustic transmitters on the sciaenid Arygyrosomus japonicus: breaking the 2% tag-to-body mass rule

2011 ◽  
Vol 62 (5) ◽  
pp. 432 ◽  
Author(s):  
A. R. Childs ◽  
T. F. Næsje ◽  
P. D. Cowley
Keyword(s):  
Adverse Effects ◽  
Body Mass ◽  
Control Group ◽  
Fish Behaviour ◽  
Long Term Effects ◽  
Internal Damage ◽  
Tag Retention ◽  
Surgical Implantation ◽  
Related Mortality

Biotelemetry is an increasingly popular and effective tool to study fish movements. Interpretation of the results relies on the assumption that fish behaviour and physiology is not affected by the presence of the tag. Although the long-term effects of tagging should be evaluated before field telemetry studies, this has rarely been quantified. As a precursor to a long-term telemetry study on Argyrosomus japonicus (Termminck and Schlegel 1843) in South Africa, the effects of surgical implantation of two different-sized tags were assessed in a 256-day experiment. We hypothesised that the larger 13-mm-diameter tags, which exceeded the general 2% tag-to-body mass rule, would have adverse effects on growth, survival and tag retention compared with the smaller 9-mm-diameter tags and an untagged control group. Because no adverse effects in growth were observed among the three groups, nor any long-term tag-related mortality, tag expulsion or internal damage, we suggest that the general 2% tag-to-body mass rule should be regarded only as a broad guide. Further, we conclude that juvenile A. japonicus individuals are well suited for surgical implantation of commercially available 9- and 13-mm-diameter tags and are good candidates for long-term telemetry studies.

scholarly journals Effects of sound exposure on the growth and intracellular macromolecular synthesis ofE. colik-12

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1920 ◽  
Author(s):  
Shaobin Gu ◽  
Yongzhu Zhang ◽  
Ying Wu
Keyword(s):  
Growth Rate ◽  
Specific Growth Rate ◽  
Specific Growth ◽  
Average Length ◽  
Biological Effects ◽  
Control Group ◽  
Macromolecular Synthesis ◽  
E Coli ◽  
Sound Exposure ◽  
K 12

Microbes, as one of the primary producers of the biosphere, play an important role in ecosystems. Exploring the mechanism of adaptation and resistance of microbial population to various environmental factors has come into focus in the fields of modern microbial ecology and molecular ecology. However, facing the increasingly serious problem of acoustic pollution, very few efforts have been put forth into studying the relation of single cell organisms and sound field exposure. Herein, we studied the biological effects of sound exposure on the growth ofE. coliK-12 with different acoustic parameters. The effects of sound exposure on the intracellular macromolecular synthesis and cellular morphology ofE. coliK-12 were also analyzed and discussed. Experimental results indicated thatE. coliK-12 exposed to sound waves owned a higher biomass and a faster specific growth rate compared to the control group. Also, the average length ofE. coliK-12 cells increased more than 27.26%. The maximum biomass and maximum specific growth rate of the stimulation group by 8000 Hz, 80dB sound wave was about 1.7 times and 2.5 times that of the control group, respectively. Moreover, it was observed thatE. coliK-12 can respond rapidly to sound stress at both the transcriptional and posttranscriptional levels by promoting the synthesis of intracellular RNA and total protein. Some potential mechanisms may be involved in the responses of bacterial cells to sound stress.

scholarly journals The toxicity of the technical product, derived triazolinones

2020 ◽  
Vol 64 (2) ◽  
pp. 83-87 ◽  
Author(s):  
Valery N. Rakitskii ◽  
E.G. Chkhvirkiya ◽  
T.M. Epishina
Keyword(s):  
Body Weight ◽  
Hematological Parameters ◽  
Oral Intake ◽  
Total Activity ◽  
The Body ◽  
Male Rats ◽  
Control Group ◽  
Long Term Effects ◽  
Technical Product

Introduction. Technical products that are part of pesticides recommended for use in agriculture must undergo a comprehensive sanitary and Toxicological examination, which is the basis for preventing the adverse effects of pesticides on the health of workers and the population, as well as on the sanitary state of the environment. Purpose of research - the study of the biological effect of the technical product derived triazolinthionov, with its repeated oral intake in mammals (rats), justification of the permissible daily dose (DSD) for humans. Material and methods. Chronic (12 months) experiment was conducted on male rats with a body weight of 200-210 g tested doses: 5.0; 50.0 and 500.0 mg/kg body weight (1 control and 3 experimental groups and 20 individuals each). In the dynamics of the experiment, we observed the condition and behavior of animals, water and food consumption, fixed the timing of death, recorded changes in body weight, physiological, biochemical and hematological parameters. Results. It was found that the dose of 5.0 mg/kg body weight does not cause significant changes in all studied parameters, doses of 50.0 and 500.0 mg/kg body weight had a polytropic effect on the body of experimental animals. Discussion. The studied technical product at repeated intake in doses of 50,0 and 500,0 mg/kg of body weight causes changes in the state of the Central nervous system of animals (statistically significant changes in SPP, total activity, path length, rest time), as well as changes in carbohydrate, lipid, and lipoprotein metabolism in the body, as evidenced by statistically significant changes in biochemical and hematological indicators. Consequently, doses of 50,0 and 500,0 mg/kg of body weight have a polytropic effect on the body of male rats and are effective. The dose of 5.0 mg/kg of body weight, when administered in animals of the experimental group in comparison with animals of the control group, there are no changes in all the studied parameters throughout the experiment, is accepted as invalid. On the basis of an inactive dose of 5.0 mg/kg of body weight and a reserve factor of 100, we have scientifically justified DSD for humans at the level of 0.05 mg/kg. Conclusion. Studies have shown that long-term repeated oral administration of the studied product into the body of animals (male rats) at a dose of 5.0 mg per 1 kg of body weight does not cause statistically significant changes in all the studied parameters, so the indicated dose is invalid. Doses of 50,0 and 500,0 mg/kg MT have a polytropic effect on the body of male rats and are effective. DSD for humans at the level of 0.05 mg/kg is justified based on the inactive dose at the level of 5.0 mg per 1 kg of body weight, established in a 12-month chronic experiment conducted on male rats, and the reserve coefficient of 100 (taking into account the unexpressed specific and long-term effects).

RESEARCH ON THE LONG-TERM EFFECTS OF THE CARBOHYDRATE-VITAMIN-MINERAL CONCENTRATE “LIZUNETS SOLEVIT”

2020 ◽  
Vol 15 (8) ◽  
pp. 1147-1153
Author(s):  
D.D. Khayrullin ◽  
Keyword(s):  
Aqueous Suspension ◽  
Animal Husbandry ◽  
The Body ◽  
Control Group ◽  
Long Term Effects ◽  
Rat Pups ◽  
White Rats ◽  
Production Increase ◽  
Different Doses

The main factors constraining the development of animal husbandry is a weak fodder base, due to insufficient supply of nutrients; the costs of its production increase and becomes the cause of metabolic disorders in animals. The aim of our research was to study the embryotoxic and teratogenic effect of the new CVMC “Lizunets-Solevit” on white rats. For this reason, the drug was administered to pregnant females in the form of an aqueous suspension in different doses for 19 days. By the end of the study, no visible signs of fetal abnormalities were found after autopsy of the experimental rats. There was no significant increase in the number of corpus luteum compared with the control group at 1/10 dose by 1.1% and 1/20 dose by 1.95%, respectively. The preimplantation death of zygotes was taken into account on the embryotoxic effect of the drug, in comparison with the control group at a dose of 1/10 more by 19.7%, and at a dose of 1/20 less by 6.23%. The total embryonic mortality is higher in the experimental groups of animals by 12.69% and 3.74% than in the control. Post-implantation death of embryos in the control group was 4.99%, in the experimental 1/10 dose - 4.69% and in the experimental 1/20 dose - 6.66%. In terms of physiological development, the rat pups of the experimental groups did not differ from the control. Thus, it was found that CVMC “Lizunets-Solevit”, in doses of 1/10 and 1/20, has no embryotoxic and teratogenic effects in the body of white rats, their embryos and young animals of the neonatal and postnatal periods of life.

scholarly journals Optimum Protein Requirement of Juvenile Orange-Spotted Grouper (Epinephelus Coioides)

2020 ◽  
Author(s):  
Xiaobo Yan ◽  
Junjiang Yang ◽  
Xiaohui Dong ◽  
Beiping Tan ◽  
Shuang Zhang ◽  
...  
Keyword(s):  
Growth Rate ◽  
Specific Growth Rate ◽  
Protein Content ◽  
Protein Level ◽  
Specific Growth ◽  
The Body ◽  
Epinephelus Coioides ◽  
Protein Requirement ◽  
Crude Lipid ◽  
Protein Levels

Abstract The purpose of subject was to explore the optimum protein requirement of juvenile grouper (Epinephelus coioides). In the test, 450 juveniles with an average weight of (10.02 ± 0.22) g were randomly divided into 6 groups, which were repeated 3 times, and were fed with 350 g/kg, 400 g/kg, 450 g/kg, 500 g/kg, 550 g/kg and 600 g/kg iso-lipid test diet twice one day for 8 weeks, respectively. The results showed that: 1) As protein levels rose, the body weight gain rate and specific growth rate first increased and then reduced, while the feed coefficient rate first decreased and then increased, while the protein efficiency significantly decreased. 2) As protein levels rose, the condition factor, hepaticsomatic index and visceralsomatic index significantly reduced. 3) With the raising of protein level, the crude protein content of whole fish and muscle gradually increased, while the crude lipid content gradually decreased. 4) High-protein diet (550-600g/kg) significantly increased the plasma total protein content and decreased the triglyceride content of orange-spotted grouper. 5) Compared with the 350 g/kg group, 500 g/kg, 550 g/kg, 600 g/kg groups significantly increased the activities of glutamic-pyruvic transaminase and glutamic oxaloacetic transaminase in liver. 6) As protein levels rose, the protease activity of intestine first increased and then decreased, and reached the maximum at the protein level of 500 g/kg, while lipase and amylase decreased significantly. 7) The activities of acid phosphatase, superoxide dismutase and lysozyme in the liver increased first and then decreased with the increasing of protein level, and reached the maximum in the 400 g/kg protein group. According to the analysis specific growth rate, the optimum protein level of juvenile orange-spotted grouper is 521.84 g/kg.

scholarly journals KINERJA PRODUKSI IKAN BOTIA (Chromobotia macracanthus) PADAT TEBAR TINGGI DENGAN SISTEM RESIRKULASI

2018 ◽  
Vol 3 (1) ◽  
pp. 17
Author(s):  
Muarofah Ghofur ◽  
Eko Harianto
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Specific Growth Rate ◽  
Specific Growth ◽  
Quality Data ◽  
Fish Scale ◽  
Feed Conversion ◽  
Water Quality Data ◽  
Ph Range

ABSTRACTCultivation technology and systems development   especially on the breedstock phase with a focus of study is the density of the initial activities in determining the degree of success of the cultivation. This research aims to determine the performance of fish production botia (c. Macracanthus Bleeker) with dense stocking 2 e/L, 3 L, and e/e/4 L on recirculation systems as a basis for increased productivity of biomass. Long-term goals to be achieved the creation of a technologypackage pendederan botia fish skalla bulk production to support  the fish are botia Jambi. Maintenance carried out for 3 months with a target size of botia fish scale market. Cultivation of technical indicators that measure in  among others,the degree of viability (DKH), specific growth rate (LPS),  feed conversion (KP), keefesien the diversity of weights (KK) and water quality. The results showed that the degree of viability (DKH) best of 91.67% (treatment A), specific growth rate (LPS) of 9.75 (treatment B),the value of the feed conversion (KP) in A treatment of 1.3 and koefesien diversity of  weights  (KK) highest of 112.67 treatment b. While for water quality data are all in the normal range, the temperature is 28oC, d.o. 5.5 – 7.5 mg/L, CO2 0.5423 – 0.7657 mg NH3/L, 0.0011 – 0.0019 mg/L, and a pH range from 6.68 – 7.89.Keyword: Fish Are Botia, Dense Stocking, Production, Recirculation ABSTRAK Pengembangan sistem dan teknologi budidaya terutama pada fase pendederan dengan fokus kajian kepadatan merupakan kegiatan awal dalam menentukan tingkat keberhasilan budidaya.  Penelitian ini bertujuan untuk menetukan kinerja produksi ikan botia  (C. Macracanthus Bleeker) dengan padat tebar 2 e/L,  3 e/L, dan 4 e/L pada sistem resirkulasi sebagai dasar peningkatan produktivitas biomassa. Tujuan jangka panjang yang ingin dicapai terciptanya paket teknologi pendederan ikan botia skalla massal untuk mendukung produksi ikan botia Jambi. Pemeliharaan dilakukan selama 3 bulan dengan target ukuran ikan botia skala pasar. Indikator teknis budidaya yang di ukur antara lain, derajat kelangsungan hidup (DKH), laju pertumbuhan spesifik (LPS), konversi pakan (KP), keefesien keragaman bobot (KK) dan kualitas air. Hasil penelitian menunjukkan bahwa derajat kelangsungan hidup (DKH) terbaik sebesar 91.67% (perlakuan A), laju pertumbuhan spesifik (LPS) sebesar 9,75 (perlakuan B), nilai konversi pakan (KP) terbaik pada perlakuan A sebesar 1,3 dan koefesien keragaman bobot (KK)  tertinggi sebesar 112,67 pada perlakuan B. Sedangkan untuk data kualitas air semuanya dalam kisaran normal, suhu 28oC, DO 5,5 – 7,5 mg/L, CO2 0,5423 – 0,7657 mg/L, NH3 0,0011 – 0,0019 mg/L, dan pH berkisar 6,68 – 7,89.   Keyword         :  Ikan Botia, Padat Tebar, Produksi, Resirkulasi

scholarly journals Long-term effects of premature birth on somatic development in women through adolescence and adulthood

2017 ◽  
Vol 46 (1) ◽  
pp. 44-53 ◽  
Author(s):  
Katarzyna Kaczmarczyk ◽  
Aleksandra Pituch-Zdanowska ◽  
Ida Wiszomirska ◽  
Andrzej Magiera ◽  
Aleksander Ronikier
Keyword(s):  
Preterm Birth ◽  
Bioelectrical Impedance ◽  
The Body ◽  
Control Group ◽  
Long Term Effects ◽  
Anthropometric Parameters ◽  
Somatic Development ◽  
Waist Hip Ratio ◽  
Preterm Born

Objectives To evaluate the long-term consequences of preterm birth on anthropometric parameters in women in adolescence and into adulthood. Methods Seventy girls born preterm (age 12.22 ± 1.52 years) and 48 born at term participated in the first stage. Eighteen years later, 13 of the same women participated in a follow-up and were compared with a control group of 27 women. We compared anthropometric results across the two examinations, and in the second stage, also assessed body composition using bioelectrical impedance analysis. Results No significant differences were found in anthropometric parameters or the content of individual components of the body between the preterm-born and control groups. However, the preterm-born group showed a tendency for higher average fat mass and lower fat-free and soft lean mass compared with the control group, and had a significantly higher mean waist–hip ratio. Conclusions Preterm birth does not adversely affect somatic development in girls during adolescence, but shows a correlation with an elevated waist–hip ratio in adulthood.

scholarly journals Body composition, growth performance and enzyme activities of Labeo rohita fed different commercial fish feeds

2023 ◽  
Vol 83 ◽  
Author(s):  
S. Abbas ◽  
Asia Iqbal ◽  
K. M. Anjum ◽  
S. Sherzada ◽  
U. Atique ◽  
...  
Keyword(s):  
Growth Rate ◽  
Body Composition ◽  
Weight Gain ◽  
Specific Growth Rate ◽  
Growth Performance ◽  
Enzyme Activities ◽  
Specific Growth ◽  
Labeo Rohita ◽  
The Body ◽  
Fish Feeds

Abstract We have evaluated the effects of different fish feeds on the body composition, growth, and enzyme activities of Labeo rohita (Rohu). In total, 240 fishes between the average weights of 24.77±2.15g were studied. The treatments were applied in a completely randomized design, with 4 treatments of 60 fishes each. Treatments consisted of four different fish feeds [Oryza (T1), AMG (T2), Aqua (T3), and Supreme (T4)]. Body composition, growth performance, and enzyme activities were evaluated. There was a significant variation in performance of fishes fed with different type of feed; as fishes having Oryza feed showed the highest weight gain, specific growth rate (SGR), and best feed conversion ratio (FCR) as compared to other groups that were considered to be significant (P ≤ 0.05). High net weight gain was obtained in T4 when compared with T2 and T3. FCR value of T4 was less than T1 but higher than T2, T3 and T2, which showed the lowest values. The specific growth rate was recorded as average in T4, but T2 led a high SGR than T3. Similarly, crude protein level and digestive enzymes activity was recorded significantly highest in fed with Oryza (T1) as compared to AMG (T2), Aqua (T3), and Supreme (T4). Water quality parameters were recorded significant in all treatments except pH and DO of treatment (T1), significantly different from other treatments. It was concluded that Rohu (Labeo rohita) could show a promising growth rate and protease enzyme activity when fed with the Oryza feed of 25% protein.

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