Application of a smart dynamic scale for measuring live-fish biomass in aquaculture

2021 ◽  
Author(s):  
Lorenzo Rossi ◽  
Carlo Bibbiani ◽  
Baldassare Fronte ◽  
Eugenio Damiano ◽  
Alberto Di Lieto
Keyword(s):  
Fish Biomass ◽  
Live Fish

Smart and cheap scale for estimating live-fish biomass in offshore aquaculture

2020 ◽  
Author(s):  
Eugenio Damiano ◽  
Carlo Bibbiani ◽  
Baldassare Fronte ◽  
Alberto Di Lieto
Keyword(s):  
Fish Biomass ◽  
Live Fish ◽  
Offshore Aquaculture

scholarly journals Application of Quantitative-PCR to Monitor Netpen Sites in British Columbia (Canada) for Tenacibaculum Species

Pathogens ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 414
Author(s):  
Joseph P. Nowlan ◽  
Scott R. Britney ◽  
John S. Lumsden ◽  
Spencer Russell
Keyword(s):  
Atlantic Salmon ◽  
Quantitative Pcr ◽  
Salmo Salar ◽  
Bacterial Load ◽  
Temporal Distribution ◽  
Quality Parameters ◽  
Antimicrobial Use ◽  
Live Fish ◽  
Dead Fish ◽  
Pcr Assays

Tenacibaculum are frequently detected from fish with tenacibaculosis at aquaculture sites; however, information on the ecology of these bacteria is sparse. Quantitative-PCR assays were used to detect T. maritimum and T. dicentrarchi at commercial Atlantic salmon (Salmo salar) netpen sites throughout several tenacibaculosis outbreaks. T. dicentrarchi and T. maritimum were identified in live fish, dead fish, other organisms associated with netpens, water samples and on inanimate substrates, which indicates a ubiquitous distribution around stocked netpen sites. Before an outbreak, T. dicentrarchi was found throughout the environment and from fish, and T. maritimum was infrequently identified. During an outbreak, increases in the bacterial load in were recorded and no differences were recorded after an outbreak supporting the observed recrudescence of mouthrot. More bacteria were recorded in the summer months, with more mortality events and antibiotic treatments, indicating that seasonality may influence tenacibaculosis; however, outbreaks occurred in both seasons. Relationships were identified between fish mortalities and antimicrobial use to water quality parameters (temperature, salinity, dissolved oxygen) (p < 0.05), but with low R2 values (<0.25), other variables are also involved. Furthermore, Tenacibaculum species appear to have a ubiquitous spatial and temporal distribution around stocked netpen sites, and with the potential to induce disease in Atlantic salmon, continued research is needed.

Fish biomass increase after a four-year trawl ban in the Gulf of Castellammare (NW Sicily, Mediterranean Sea)

2000 ◽  
Vol 48 (1) ◽  
pp. 23-30 ◽  
Author(s):  
Carlo Pipitone ◽  
Fabio Badalamenti ◽  
Giovanni D’Anna ◽  
Bernardo Patti
Keyword(s):  
Mediterranean Sea ◽  
Fish Biomass ◽  
Biomass Increase

scholarly journals A long-term, spatially replicated experimental test of the effect of marine reserves on local fish yields

2005 ◽  
Vol 62 (1) ◽  
pp. 98-108 ◽  
Author(s):  
Angel C Alcala ◽  
Garry R Russ ◽  
Aileen P Maypa ◽  
Hilconida P Calumpong
Keyword(s):  
Coral Reefs ◽  
Experimental Test ◽  
Marine Reserves ◽  
Fish Biomass ◽  
Total Catch ◽  
Target Fish ◽  
Fish Yields

Do no-take marine reserves affect fishery yields? Manipulations of reserve status, and yield estimates, were made at two Philippine islands over two decades. Twenty-five percent and ten percent, respectively, of the coral reefs at Sumilon and Apo islands were made no-take reserves in 1974 and 1982. Biomass of target fish increased inside the no-take reserves 3- to 4.5-fold over 9–18 years. Biomass did not increase outside each reserve. Protection of the Sumilon reserve ceased in 1984. Biomass of targeted fish in the reserve and trap and gillnet catches of these fish declined by 42.7% and 40%, respectively, by 1985. The reserve was reprotected from 1987 to 1991 and from 1995 to 2001. Fish biomass increased in the reserve by 27.2%. Trap and gillnet catches outside the reserve increased 26.9% by 2001. The Apo reserve was protected from 1982 to 2001. Total catch of major fish families was significantly higher after (1985–2001) than before (1981) reserve establishment at Apo, increasing 41.3% between 1981 and 1998–2001. These experiments, plus spillover evidence, suggest that marine reserves may help maintain, or even enhance, local fishery yields in the long-term.

Biomass-size spectra and the prediction of fish biomass in lakes

1996 ◽  
Vol 53 (5) ◽  
pp. 994-1006 ◽  
Author(s):  
H Cyr ◽  
R H Peters
Keyword(s):  
Fish Biomass ◽  
Size Spectra

Comparative characteristics of the conditions for harvesting, transportation and spawning of pike perch in fish farms in Kazakhstan

2021 ◽  
pp. 43-55
Author(s):  
Nina Sergeevna Badryzlova
Keyword(s):  
State Enterprise ◽  
Fish Farms ◽  
Fish Hatchery ◽  
Fish Breeding ◽  
Live Fish ◽  
First Case ◽  
Pike Perch ◽  
The Republic ◽  
Fish Tanks ◽  
White Clay

A description of biotechnical methods of harvesting pike perch in natural reservoirs, methods of catching pike perch spawners, keeping in adaptation cages and transporting pike perch from fishing sites to the farm is given. Pike perch breeders were caught from the reservoirs with fixed and floating nets during the period: in the Kapshagai reservoir from 10 to 20 April; in the Syrdarya river — from April 20 to May 5. The adaptation was carried out in cages located in the coastal zone. Transportation to the fish farm was carried out in live fish tanks with a volume of 1 and 3 m³ with water aeration. The reproduction of pike perch was carried out in two fish farms of the Republic of Kazakhstan. The data on spawning of pike perch in two ways are given: in cages on nests; as well as the receipt of reproduction products by the factory method from “flowing” producers. In the first case, females and males were placed in cages in a ratio of 1:1 and 1:2; a spawning nest was installed in each cage and spawning was monitored. In the second case, from the “flowing” pike perch breeders ready for spawning, reproductive products (eggs and sperm) were obtained, fertilization and degluing were carried out with a suspension of white clay. The monitoring of hydrochemical indicators was constantly carried out, the dates of the beginning and end of spawning of pike perch were determined. The article presents the fish-breeding and biological characteristics of pike perch producers participating in spawning. The mass of spawned pike perch females in LLP “Halyk Balyk” ranged from 2 kg to 2.5 kg, males — 1.5–2.5 kg; females weighing 2.1–2.6 kg were used in the Republican State Enterprise “Kamyshly-Bashsky Fish Hatchery”; males — from 1.2 kg to 2.4 kg. Based on the results of the research, biotechnical standards were developed for the preparation of pike perch producers in water bodies, for transportation to fish farms, standards for spawning of pike perch in various ways.

Study of Self-Propelled Pufferfish Driven by Multiple Fins: A Comparison Between Rigid and Deformable Fins

2017 ◽  
Author(s):  
Ruoxin Li ◽  
Qing Xiao ◽  
Lijun Li ◽  
Hao Liu
Keyword(s):  
Underlying Mechanism ◽  
Operating Conditions ◽  
The Self ◽  
Fish Swimming ◽  
Propulsion Efficiency ◽  
Live Fish ◽  
Body Dynamics ◽  
Computational Fluid Dynamics Cfd ◽  
Multi Body ◽  
Better Than

In this work, we numerically studied the steady swimming of a pufferfish driven by the undulating motion of its dorsal, anal and caudal fins. The simulations are based on experimentally measured kinematics. To model the self-propelled fish swimming, a Computational Fluid Dynamics (CFD) tool was coupled with a Multi-Body-Dynamics (MBD) technique. It is widely accepted that deformable/flexible or undulating fins are better than rigid fins in terms of propulsion efficiency. To elucidate the underlying mechanism, we established an undulating fins model based on the kinematics of live fish, and conducted a simulation under the same operating conditions as rigid fins. The results presented here agree with this view by showing that the contribution of undulating fins to propulsion efficiency is significantly larger than that of rigid fins.

INCORPORATION OF RADIOACTIVE PURINE AND PYRIMIDINE BASES AND OF THYMIDINE INTO THE DEOXYRIBONUCLEIC ACID OF SALMON MILTS

1964 ◽  
Vol 42 (1) ◽  
pp. 51-57 ◽  
Author(s):  
H. L. A. Tarr
Keyword(s):  
Orotic Acid ◽  
Deoxyribonucleic Acid ◽  
Tritiated Thymidine ◽  
Experimental Conditions ◽  
Live Fish ◽  
Pyrimidine Bases

C14-labeled adenine, guanine and cytosine, and tritiated thymidine were incorporated into the deoxyribonucleic acid of salmon milts, either by injection into the milts of live fish or into excised milts. The amount incorporated was very small. Under the experimental conditions radioactive nucleosides, deoxyuridine, adenosine 5′-mono- and tri-phosphates, orotic acid, uracil, ribose 1-phosphate, and ribose 5-phosphate were not incorporated. It is suggested that these results may be due to the comparative impermeability of the cells to the various compounds.

Vertical Distribution of Fish Biomass in Lake Superior: Implications for Day Bottom Trawl Surveys

2007 ◽  
Vol 27 (3) ◽  
pp. 735-749 ◽  
Author(s):  
Jason D. Stockwell ◽  
Daniel L. Yule ◽  
Thomas R. Hrabik ◽  
Jean V. Adams ◽  
Owen T. Gorman ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Lake Superior ◽  
Bottom Trawl ◽  
Fish Biomass ◽  
Distribution Of Fish ◽  
Trawl Surveys

scholarly journals Estimation of Fish Biomass Using Environmental DNA

PLoS ONE ◽  
2012 ◽  
Vol 7 (4) ◽  
pp. e35868 ◽  
Author(s):  
Teruhiko Takahara ◽  
Toshifumi Minamoto ◽  
Hiroki Yamanaka ◽  
Hideyuki Doi ◽  
Zen'ichiro Kawabata
Keyword(s):  
Environmental Dna ◽  
Fish Biomass
Sign in / Sign up

Export Citation Format

Share Document