| Gyrodactylus | Dactylogyrus | |
| Identifying features | 1 pair of large hooks on the tail. | Multiple small hooklets on the tail.“Eye-spots” visible. |
| Mode of reproduction | Viviparous (developing embryo with large hooks may be visible inside). | Produce eggs (golden brown vitelline bodies seen in the body). |
| Life-cycle | No stage of the lifecycle is free of the host and parasite numbers can build up on the host fish extremely rapidly. | Eggs are laid into the water and hatch to release a free-living oncomiracidium that actively seeks out a host. |
| Management/treatment | Single treatment will suffice. | Multiple treatments required. |
Special net for koi.
The first time I saw this net, I wondered,”How on earth do you catch a fish using a net with solid sides, a short handle and one that with a large hole at the end!”
It’s actually a fantastic way to transfer large fish from one tank to another (see blog on moving large fish also – https://thefishvet.wordpress.com/2012/02/08/how-to-move-large-fishes/) because the solid cloth sides allows you to transport the fish in a small amount of water and the fish never loses scales or gets tangled in it. The mesh material allows the handler to drain the net and the open end allows the fish to slide out easily.
Simply ingenious!
This short clip shows how we use it – http://www.youtube.com/watch?v=Qy34rOBboUs
AVMA and WAVMA combine to present an aquatic veterinary conference – August 2012.
From: Dr. David Scarfe <DScarfe@avma.org>
Participate in the
Aquatic Veterinary Program
2012 AVMA Convention
San Diego Convention Center
August 4-7, 2012
Four days of aquatic veterinary sessions for the private practitioner. Sessions (see attached) jointly organized by AVMA’s Aquatic Veterinary Medicine Committee & the World Aquatic Veterinary Medical Association.
BIG SAVINGS for Early Registration!!!! www.avmaconvention.org/avma12
· Register by May 7 and save up to $100
· Book your hotel first and receive a discount code for an additional $25 savings
· Aquatic veterinarians – enter “E219” as the VIP/Promotion Code online and receive another $25 registration discount
WAVMA Annual General Meeting
Come meet your colleagues, feast on free food & find out what’s evolving in Aquatic Veterinary Medicine
Monday, August 6 @ 6:00 – 10:00 pm (Location to be announced)
Planning to attend the AGM and feast with the best? —– e-mail cypcarpio@aol.com by July 31, 2012 to ensure we have food and space for you
Visit the AVMA/WAVMA Aquatic Veterinary Medicine Booth (2220/2222) in the Exhibit Hall
But that’s not all for the 2012 AVMA Convention ………. Step Ahead, you’ll be glad you did!
- · Earn up to 42 Hours of CE – Join thousands of the best and brightest minds in veterinary medicine for CE, networking opportunities, and fun in San Diego. Fill your days with some of the strongest CE available, then enjoy some down-time at family-friendly social events or out-and-about at one of San Diego’s many attractions.
- · Over 360 Educational Sessions to Choose From – With sessions covering all areas of veterinary medicine, from aquatics to zoos the AVMA offers something for everyone in the profession.
- · Hot topics & Future Trends – New session formats like “Inside the Issues” allow exploring and discussing the latest industry developments. It’s a unique new way to get in tune with the pulse of what’s going on in the everyday veterinary medicine world.
For More Information, Housing & Registration go to www.avmaconvention.org/avma12
See the flyer from the link below for more information and the full aquatic veterinary program
Abalone show no immunity to herpesvirus.
The information below is extracted from:
Health Highlights
Aquatic Animal Health Subprogram Newsletter
Volume 11, Issue 2, January 2012
The recent emergence in Australia of abalone viral ganglioneuritis (AVG) caused by abalone herpeslike virus (AbHV) is recognised as a major commercial threat to both the wild capture and the fledgling aquaculture industries, and an environmental threat to wild populations in general.
Results from recent research demonstrated that abalone from various sites along the Victorian coast-line that had experienced outbreaks of AVG remained susceptible to infection and disease. The mature abalone that were sourced from these areas are presumed to be survivors from the previous disease outbreaks and the juvenile abalone are presumed to be the progeny of these survivors.
Neither groups demonstrated any resistance to reinfection and appeared to be as susceptible as naïve counterparts sourced from a farm that had no history of AVG.
This knowledge will assist industry and regulators manage the wild abalone fishery into the future.
How to inject fish with medicine?
From time to time, we may need to inject fish with medicines. How do you do this?
This clip shows the technique in action.
Why use dechlorinators?
It’s Saturday, the first day of the weekend and let’s do some maintenance on the fish tank and make large partial water changes without adding chlorine neutraliser….
Or, let’s top up the fish pond… .and forget to turn off the tap first before going to the shops….
Catastrophe strikes and your fish become exposed to dangerous levels of chlorine.
Have a read of this article I co-authored with a colleague while I was working as a veterinary fish pathologist in Tasmania.
This article describes the microscopic damage that occurs in fish with chlorine toxicosis in fish.
Histopathology of Chlorine Toxicity in Rainbow Trout
Did you know fish can drown?
Did you know that some fish like the Siamese fighting fish can drown if they do not have access to air at the surface? The labyrinth fishes, catfishes and lung fishes are just some of the common air-breathing fishes. They have developed this adaptation to allow them to live in waters that carry little dissolved oxygen.
How is beer and swimbladder related?
I was watching River Monsters and discovered another use for the swimbladder – it is used as a filter in beer production!
Feed fish onions?
We’ve heard of garlic being good for fish’s immune system with an antiparasitic effect. This recent study suggests onions are just as healthy!
| Journal of the World Aquaculture Society | |||||||||||||||||
| Volume 43, Number 1 (February 2012) | |||||||||||||||||
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Onion Powder in the Diet of the Olive Flounder, Paralichthys olivaceus: Effects on the Growth, Body Composition, and Lysozyme Activity | ||||||||||||||||
| Authors: | Sung Hwoan Cho 1, Sang-Min Lee 2 | ||||||||||||||||
| Author Affiliations: |
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| Source: | Journal of the World Aquaculture Society, Volume 43, Number 1 (February 2012) | ||||||||||||||||
| Page Numbers: | 30 – 38 | ||||||||||||||||
| Available Full Text: |
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| Abstract: | This study tested the onion powder (OP) supplementation in the diet of the olive flounder on the growth, body composition, and lysozyme activity. Thirty-five fish averaging 5.1 g were randomly stocked into 18 individual 180-L flow-through tanks. A commercially available OP was used as a dietary additive. Six experimental diets were prepared to contain OP at the concentrations of 0, 0.5, 1, 2, 3, and 5% for diets OP-0, OP-0.5, OP-1, OP-2, OP-3, and OP-5, respectively. After the 8-wk feeding trial, 20 fish from each tank were infected with Edwardsiella tardaand mortality was monitored for the following 96 h. No distinctive improvement in survival, weight gain, or feed efficiency of fish was observed at the end of the 8-wk feeding trial. Lysozyme activity in fish fed the OP-0.5 diet was higher than that of fish fed the OP-0, OP-1, OP-2, OP-3, and OP-5 diets. The cumulative mortality of fish fed the OP-0.5, OP-1, OP-2, OP-3, and OP-5 diets was lower than that of fish fed the OP-0 diet at 72 h after E. tardainfection. Dietary inclusion of 0.5% OP was effective at improving lysozyme activity of fish, and OP seemed to be an effective immunostimulant to lower mortality upon E. tardainfection. | ||||||||||||||||
| Citation: | Sung Hwoan Cho, Sang-Min Lee . Onion Powder in the Diet of the Olive Flounder, Paralichthys olivaceus: Effects on the Growth, Body Composition, and Lysozyme Activity.Journal of the World Aquaculture Society, Volume 43, Number 1 (February 2012), pp. 30-38, | ||||||||||||||||
| URL: | http://ejournals.ebsco.com/direct.asp?ArticleID=486B8A7C35C506F24E6A | ||||||||||||||||
How to move large fishes?
I just had a client ring me in distress but unfortunately, it was too late.
This owner had to move a large fish and it irreversibly damaged itself in the process.
If your fish is not tame and used to handling, it is advisable to sedate it first regardless of how far you need to move it. This is good for the fish and good for the handlers for several reasons:
- Fish will not stress,
- Fish will not injure itself by colliding into sides or fracturing its back,
- Avoids tank breakage and glass splinters,
- Avoid splashing water everywhere (electrical danger),
- Minimising danger to the handler.
Check out the video on this link where we had to move a sizeable Murray Cod.
http://www.abc.net.au/creaturefeatures/murraycod.htm
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Now on: Twitter – Blog – Facebook – Linkedin
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Yours sincerely,Dr Richmond Loh
BSc BVMS MPhil (Vet Path) MANZCVS (Aquatics & Pathobiology) DipPM
BSc BVMS MPhil (Vet Path) MANZCVS (Aquatics & Pathobiology) DipPM
Veterinarian / Adjunct Lecturer Murdoch University / Secretary Aquatic Animal Health Chapter ANZCVS
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
http://www.thefishvet.com.au
Ph: +61 (0)421 822 383