scholarly journals An Assessment of Fish Herding Techniques: Management Implications for Mass Removal and Control of Silver Carp

2021 ◽  
Author(s):  
Josey L. Ridgway ◽  
Katelyn M. Lawson ◽  
Stephen A. Shier ◽  
Robin D. Calfee ◽  
Duane C. Chapman
Keyword(s):  
Silver Carp ◽  
Management Implications ◽  
Mass Removal ◽  
And Control

scholarly journals Observation of silver carp spawning in a Mississippi River tributary

2021 ◽  
Author(s):  
K. Killgore ◽  
Steven George
Keyword(s):  
Mississippi River ◽  
Silver Carp ◽  
Technical Note ◽  
Spawning Cues ◽  
And Control

This technical note seeks to better understand spawning cues of invasive carp for management and control purposes.

COST EFFECTIVENESS OF BREEDING UNDERYEARLINGS OF COMMON CARP AND HERBIVOROUS FISHES IN THE FISH-BREEDING FARM OF ALMATY REGION OF KAZAKHSTAN

2017 ◽  
pp. 80-88
Author(s):  
Evgeniy Victorovich Fedorov
Keyword(s):  
Silver Carp ◽  
Ctenopharyngodon Idella ◽  
Herbivorous Fish ◽  
Average Weight ◽  
The South ◽  
Fish Farms ◽  
Commercial Fish ◽  
Herbivorous Fishes ◽  
Control Version ◽  
And Control

The article highlights the problem of commercial breeding of carp yearlings ( Cyprinus carpio ) in the fish farms in the south part of Kazakhstan with the purpose of the industrial cycle reduction. There is given a brief description of the experience in growing carp yearlings as a commercial fish product (pilot variant) and fish seeds (control variant) in polyculture with herbivorous fishes (grass carp ( Ctenopharyngodon idella ) and silver carp ( Hypophthalmichthys molitrix )) using various technological schemes, in the fish farms in the Almaty region. There are presented initial data on the stocking of experimental and control ponds by young adults; data on the final harvest of experimental ponds, including the average weight of commercial yearlings of carp and seeds of silver carp in the experimental version, and carp seeds and herbivorous fish in the control version; the fish productivity of ponds according to each polycultural specimen and the costs of artificial feed. Calculations are given on economic efficiency of growing yearlings in pilot and control variants, the profitability of growing commercial carp in the pilot version and the cost of fish seeds for carp and herbivorous fish in the control version. The most economically efficient technological schemes for growing yearlings of carp and herbivorous fish species in fish farms with channel ponds in the south of Kazakhstan have been proposed. The article shows that breeding carp yearlings is well-founded It presents the ways of planning of breeding the fish-seeds of carp and herbivorous fishes in fish-hatcheries and pond farms of Kazakhstan in modern economic conditions.

scholarly journals Cryoprotective Effects of Protein Hydrolysates Prepared from By-Products of Silver Carp (Hypophthalmichthys Molitrix) on Freeze-Thawed Surimi

2019 ◽  
Vol 9 (3) ◽  
pp. 563
Author(s):  
Wen-Juan Zhou ◽  
Fa-Xiang Wang ◽  
Jian Yu ◽  
Xiang-Hong Li ◽  
Yong-Le Liu
Keyword(s):  
Atpase Activity ◽  
Silver Carp ◽  
Textural Properties ◽  
Surface Hydrophobicity ◽  
Protein Hydrolysates ◽  
Control Group ◽  
Hypophthalmichthys Molitrix ◽  
Freeze Thaw ◽  
And Control ◽  
By Products

The cryoprotective effects of different amounts of protein hydrolysates prepared from by-products of silver carp using Protamex and Alcalase on surimi that were subjected to six freeze-thaw cycles were investigated. Commercial cryoprotectant (8% w/w 1:1 sucrose-sorbitol blend, SuSo) and control (without cryoprotectant) groups were used for comparison. After six freeze-thaw cycles, the lowest actomyosin extractability, Ca2+-ATPase activity and total sulfhydryl content, along with the highest surface hydrophobicity of actomyosin, were observed in the control group (P < 0.05). On the contrary, the group with addition of 2 g of hydrolysate prepared by Protamex hydrolysis (PH-2) displayed the highest actomyosin extractability, Ca2+-ATPase activity and correspondingly, lowest surface hydrophobicity of actomyosin (P < 0.05). Total sulfhydryl content of actomyosin and textural properties of heat-set surimi gels were similar between samples with PH-2 and those with SuSo (P > 0.05). Differences in molecular weight distribution, total and free amino acid compositions between the hydrolysates prepared by Protamex and Alcalase hydrolysis were possible reasons attributing to their variable cryoprotective effects on freeze-thawed surimi. Results from this study clearly support that hydrolysate prepared by Protamex hydrolysis at an appropriate amount could serve as an effective cryoprotectant without increasing the sweetness of surimi products. Furthermore, our findings suggest that the hydrolysates follow a different cryoprotection mechanism compared to SuSo (sucrose-sorbitol blend).

The Impact of Courts on Public Management: New Insights From the Legal Literature

2016 ◽  
Vol 49 (5) ◽  
pp. 658-678 ◽  
Author(s):  
Andrew Osorio ◽  
Rosemary O’Leary
Keyword(s):  
Public Administration ◽  
Public Management ◽  
Public Institutions ◽  
Reasonable Doubt ◽  
Management Implications ◽  
The Past ◽  
Legal Literature ◽  
And Control ◽  
The Impact ◽  
The Relationship

This article challenges some of the accepted wisdom about the relationship between courts and public institutions. The authors raise a reasonable doubt concerning whether judges as a whole are refusing to defer to administrator’s expertise and have lost their “cloak of neutrality.” Moreover, there is evidence to conclude that judges, as a whole, are shying away from the detailed “command-and-control” approaches of the past where courts determined remedial norms, formulated comprehensive and inflexible decrees, and then occupied a substantial directive role in their implementation. At the same time, the authors find continued salience in O’Leary and Straussman’s concern regarding untested conclusions made largely in absence of empirical evidence concerning the impact of courts on public management. Implications for the education of public administration scholars and practitioners are offered.

scholarly journals Development of carp fish culture practice under different stocking densities in mid hills of Uttarakhand, India

2016 ◽  
Vol 8 (2) ◽  
pp. 812-816
Author(s):  
K.S. Mehta ◽  
Akansha Khati ◽  
Mohd Danish ◽  
V.K. Singh ◽  
H.C.S. Bisht
Keyword(s):  
Slow Growth ◽  
Silver Carp ◽  
Stocking Density ◽  
Fish Production ◽  
Exotic Fish ◽  
Negative Effect ◽  
Density Values ◽  
Species Combination ◽  
And Control ◽  
Carp Fish

The present study was undertaken in order to standardise the stocking density values of carps fishes for sustainable fisheries development in mid hills and enhancing the fish production. The paper deals with growth performance of 3 exotic fish species in low stocking density i.e. 3 fish/m3 over high stocking density of 5 fish/m3 and 10 fish/m3 in the control pond. The net production was 12.6% higher with stocking density of 3 fish/m3. Among the both tested density, the combination of 30: 40: 30 was superior (45.6%) in terms of growth and production in comparison to the other combinations and control. In present study, the highest production as 57.13kg/100m2 (5713 kg/ha.) was achieved in the stocking ratio of 30:40:30 with stocking density of 3 fish/m3. It is 4.7% higher of the combination of 40:30:30 and 4% higher than the combination of 30: 30: 40. It is 12.6% higher than the stocking density of 5 fish/m3 and 48.5% higher than the stocking density of 10 fish /m3. The growth pattern reflected the slow growth during the winter months, reflected the direct negative effect of water temperature on the growth. The production level of existing practice of the farmers may be enhanced up to 1.5 times with proper stocking density i.e. 3 fish/m3 and perfect species combination i.e. 30: 40: 30 for silver carp, grass carp and common carp respectively.

Control of Metal Alloy Oxidation with Electric Fields

1973 ◽  
Vol 31 ◽  
pp. 164-165
Author(s):  
R. R. Dils ◽  
P. S. Follansbee
Keyword(s):  
Electric Fields ◽  
Oxidation Process ◽  
Base Alloy ◽  
Oxide Surface ◽  
Platinum Electrodes ◽  
Insulating Layer ◽  
Iron Base Alloy ◽  
Alloy Oxidation ◽  
Aluminum Oxide Layer ◽  
And Control

Electric fields have been applied across oxides growing on a high temperature alloy and control of the oxidation of the material has been demonstrated. At present, three-fold increases in the oxidation rate have been measured in accelerating fields and the oxidation process has been completely stopped in a retarding field.The experiments have been conducted with an iron-base alloy, Pe 25Cr 5A1 0.1Y, although, in principle, any alloy capable of forming an adherent aluminum oxide layer during oxidation can be used. A specimen is polished and oxidized to produce a thin, uniform insulating layer on one surface. Three platinum electrodes are sputtered on the oxide surface and the specimen is reoxidized.

Evidence for a Blood Ganglion Barrier in the Superior Cervical Ganglion of the Rat

1982 ◽  
Vol 40 ◽  
pp. 204-204
Author(s):  
D. M. DePace
Keyword(s):  
Blood Vessels ◽  
Superior Cervical Ganglion ◽  
Peripheral Nerves ◽  
Time Schedule ◽  
Transmission Electron ◽  
Cervical Ganglion ◽  
The Central Nervous System ◽  
Cervical Ganglia ◽  
Capillary Circulation ◽  
And Control

The majority of blood vessels in the superior cervical ganglion possess a continuous endothelium with tight junctions. These same features have been associated with the blood brain barrier of the central nervous system and peripheral nerves. These vessels may perform a barrier function between the capillary circulation and the superior cervical ganglion. The permeability of the blood vessels in the superior cervical ganglion of the rat was tested by intravenous injection of horseradish peroxidase (HRP). Three experimental groups of four animals each were given intravenous HRP (Sigma Type II) in a dosage of.08 to.15 mg/gm body weight in.5 ml of.85% saline. The animals were sacrificed at five, ten or 15 minutes following administration of the tracer. Superior cervical ganglia were quickly removed and fixed by immersion in 2.5% glutaraldehyde in Sorenson's.1M phosphate buffer, pH 7.4. Three control animals received,5ml of saline without HRP. These were sacrificed on the same time schedule. Tissues from experimental and control animals were reacted for peroxidase activity and then processed for routine transmission electron microscopy.

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