Biofilter in spring

Some might notice that the appetite of their pond fishes are increasing. Be careful to increase feeding at a rate that allows the biofilter to adapt to the increase in feed. Usually, the biofilter lags behind fish’s appetite.

Nitrification rate in marine environment

It is only about 25%-50% as efficient as freshwater systems. This is why it is recommended to double the time for new marine tank set-ups. But did you know that you can speed it up by starting the biofilter up as a freshwater system and then when you have a fully cycled biofilter, you can increase the salinity by up to 10ppt/day to the desired level? This will shorten the start up time by up to half!

Very useful for aquaculture setups where time is money.

Australian & New Zealand College of Veterinary Scientists – Aquatic Animal Health Chapter

The Aquatic Animal Health Chapter of the College just had its AGM and yours truly has been nominated to take the post of Secretary.

Are there any veterinarians around the world who are thinking of sitting for the membership exams in 2012. If yes, then please let us know and we can organise mentors/supervisors and examiners.

For those unfamiliar with the ANZCVSc,
The principal objects of the Australian and New Zealand College of Veterinary Scientists are:

  1. To advance the study of veterinary science and to bring together members of the veterinary profession for their common benefit
  2. to hold, conduct or arrange examinations of professional proficiency for the purpose of determining qualification for Membership of the College and Fellowship of the College.

The College has a definite brief to encourage veterinarians in practice, in industry, in government employment, and in other fields to seek to improve themselves and to provide additional post-graduate qualifications as a goal.

Membership of the College should signify the following:

"The candidate is expected to demonstrate a high level of interest and competence in a given area of veterinary activity. This is judged by that standard of knowledge and understanding, practical skills, attitude, methodology and communication which would make the person suitable to give professional advice to veterinary colleagues not similarly qualified on problems or procedures often encountered or used in general practice, in the relevant area of veterinary endeavour."


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Yours sincerely,

Dr Richmond Loh
BSc BVMS MPhil (Vet Path) MANZCVSc (Aquatics & Pathobiology) DipPM CMAVA Veterinarian / Adjunct Lecturer Murdoch University
The Fish Vet, Perth, Western Australia. Mobile Veterinary Service for fish and other aquatic creatures.
http://www.thefishvet.com.au
Ph: +61 (0)421 822 383

automatic fishing machine….

Aquacultural Engineering
  Volume 45, Number 2 (September 2011)
An automatic fishing machine based on acoustic conditioning
 
     Authors: Boaz Zion 1, Assaf Barki 2, Joseph Grinshpon 1, Lavi Rosenfeld 1, Ilan Karplus 2
     Author Affiliations:
 1: Institute of Agricultural Engineering, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
 2: Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
     Source: Aquacultural EngineeringVolume 45, Number 2 (September 2011)
     Page Numbers: 87 – 91
     Available Full Text:
Full Text: Subscription Required to view full text
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Authentication: Publisher’s Site
 
 
     Abstract: ? An automatic fishing machine for sea ranching and aquaculture was developed. ? It uses acoustic conditioning to call and capture fish. ? The fishing machine was tested in a freshwater reservoir and operated successfully.
     Citation: Boaz Zion, Assaf Barki, Joseph Grinshpon, Lavi Rosenfeld, Ilan Karplus . An automatic fishing machine based on acoustic conditioning.Aquacultural Engineering, Volume 45, Number 2 (September 2011), pp. 87-91, <http://ejournals.ebsco.com/direct.asp?ArticleID=473B99A046D5D66FD88D>
     URL: http://ejournals.ebsco.com/direct.asp?ArticleID=473B99A046D5D66FD88D

Evaluation of three types of … floating plastic media … biofilters …

Aquacultural Engineering
  Volume 45, Number 2 (September 2011)
Evaluation of three types of structured floating plastic media in moving bed biofilters for total ammonia nitrogen removal in a low salinity hatchery recirculating aquaculture system
   Authors: Timothy J. Pfeiffer 1, Paul S. Wills 2
   Author Affiliations:
 1: USDA Agricultural Research Service, Sustainable Marine Aquaculture Systems, 5600 U.S. Hwy 1 North, Fort Pierce, FL 34946, USA
 2: Harbor Branch Oceanographic Institute at Florida Atlantic University, Center for Aquaculture and Stock Enhancement, 5600 U.S. Hwy 1 North, Fort Pierce, FL 34946, USA
   Source: Aquacultural EngineeringVolume 45, Number 2 (September 2011)
   Page Numbers: 51 – 59
   Available Full Text:
Full Text: Subscription Required to view full text
Format: PDF
Size: Unknown
Location: Publisher’s Site
Authentication: Publisher’s Site
   Abstract: Three different types of floating plastic media were evaluated for ammonia nitrogen removal in 0.11m3moving bed biofilters of a low salinity warm water recirculating aquaculture system. The three types of media evaluated were K1 kaldnes media, MB3 media, and AMB media. The highest volumetric total ammonia removal rates (VTR) was observed with the MB3 for the two daily feed load rates evaluated, 3.5 and 8.3kgfeed/m3media. The VTR for the respective feed load rates were 92.2 and 186.4g TAN removed/m3media-d. The percent removal was also highest for the MB3 media, 12.3 and 14.4% for the low and high feed rates respectively.
   Citation: Timothy J. Pfeiffer, Paul S. Wills . Evaluation of three types of structured floating plastic media in moving bed biofilters for total ammonia nitrogen removal in a low salinity hatchery recirculating aquaculture system. Aquacultural Engineering, Volume 45, Number 2 (September 2011), pp. 51-59, <http://ejournals.ebsco.com/direct.asp?ArticleID=46BEB7ACF158628A2E4B>
   URL: http://ejournals.ebsco.com/direct.asp?ArticleID=46BEB7ACF158628A2E4B