The fifth person killed by a shark (yesterday), off WA’s southwest coast in less than a year.
Withholding periods for drugs used in aquaculture.
The WHP is the time minimum period after the last dose of a drug has been applied to the fish/tank before the fish can be harvested for human consumption. For some medicines, it can be listed as “days” and some may be listed as “degree days”.
This link brings you to a great source of information on withholding periods
Is it good practice to have wrasses as a natural weapon against sea lice in farmed salmon?
Wrasses are becoming popular biological control agents for sea lice in farmed salmon. However, whenever introducing another animal into the mix, there is always cause for concern that they could themselves carry diseases or be vectors for transfer of diseases to the primary cultured fish. This is a great article that analyses the various aspects of wrasse health and the potential impact they could have on farmed salmon.
| Journal of Fish Diseases | |||||||||||||||||
| Volume 35, Number 8 (August 2012) | |||||||||||||||||
| |
Diseases of north European wrasse (Labridae) and possible interactions with cohabited farmed salmon, Salmo salarL. | ||||||||||||||||
| Authors: | J W Treasurer 1 | ||||||||||||||||
| Author Affiliations: |
|
||||||||||||||||
| Source: | Journal of Fish Diseases, Volume 35, Number 8 (August 2012) | ||||||||||||||||
| Page Numbers: | 555 – 562 | ||||||||||||||||
| Available Full Text: |
|
||||||||||||||||
| Abstract: | There have been several reported studies of wrasse health but none of these has shown transmission of wrasse diseases when stocked with farmed Atlantic salmon. Most of the studies have focussed on bacterial and parasite issues, including treatment of bacterial diseases with antibiotics and vaccination of wrasse. Classical and atypical furunculosis have been reported in wrasse following stress, and wrasse have been susceptible to vibrio infection. Further study is required on the vaccination of wrasse for furunculosis with latent carrier status to maximize survival. There are studies on viral diseases such as infectious pancreatic necrosis, infectious salmon anaemia and pancreas disease and although these did not give any undue concern for salmon health, there is also scope for further study in this area. Resident parasite communities of wrasse are largely host-specific and do not appear to be a threat to salmon. Given that wrasse have not, to date, been a vector of disease in salmon, attention should be placed on maintaining best practice in cohabiting wrasse with salmon. Other issues that should be addressed are good welfare of wrasse in pens and identifying measures of this, the identification of losses of wrasse in pens, being alert to potential emerging diseases through health screening of mortalities and assessing the risks associated with carrying forward wrasse from one salmon production cycle to the next. Issues of exploitation by fishing on wild wrasse stocks and improved biosecurity may be addressed by the increased movement by the industry to the stocking of farmed wrasse. | ||||||||||||||||
| Citation: | J W Treasurer . Diseases of north European wrasse (Labridae) and possible interactions with cohabited farmed salmon, Salmo salarL.. Journal of Fish Diseases, Volume 35, Number 8 (August 2012), pp. 555-562, <http://ejournals.ebsco.com/direct.asp?ArticleID=4E2DA96341DFD80E991E> | ||||||||||||||||
| URL: | http://ejournals.ebsco.com/direct.asp?ArticleID=4E2DA96341DFD80E991E | ||||||||||||||||
Sustainable fisheries and aquaculture play a crucial role in food and nutrition security and in providing for the livelihoods of millions of people.
From: Dr. David Scarfe <DScarfe@avma.org>
Date: Wed, Jul 11, 2012 at 7:11 AM
Subject: AquaVetMed: State of World Fisheries and Aquaculture – 2012 FAO Report
To:
FAO releases new State of World Fisheries and Aquaculture report: fisheries and aquaculture – enabling a vital sector to contribute more
July 10, 2012
Rome, Italy – According to the latest statistics available, almost 30 percent of fish stocks are overexploited. Sustainable fisheries and aquaculture play a crucial role in food and nutrition security and in providing for the livelihoods of millions of people. FAO’s latest flagship publication on the state of fisheries and aquaculture, launched at the opening of the 30th session of the FAO Committee on Fisheries, highlights the sector’s vital contribution to the world’s well-being and prosperity, a point reflected in the recent Rio+20 Outcome Document.
The State of World Fisheries and Aquaculture 2012 reveals that the sector produced a record 128 million tonnes of fish for human food – an average of 18.4 kg per person – providing more than 4.3 billion people with about 15 percent of their animal protein intake. Fisheries and aquaculture are also a source of income for 55 million people. “Fisheries and aquaculture play a vital role in the global, national and rural economy,” said FAO Director-General José Graziano da Silva. “The livelihoods of 12 percent of the world’s population depend directly or indirectly on them. Fisheries and aquaculture give an important contribution to food security and nutrition. They are the primary source of protein for 17 percent of the world’s population and nearly a quarter in low-income food-deficit countries.”
Árni M. Mathiesen, head of FAO’s Fisheries and Aquaculture Department, said: “Fisheries and aquaculture are making a vital contribution to global food security and economic growth. However, the sector faces an array of problems, including poor governance, weak fisheries management regimes, conflicts over the use of natural resources, the persistent use of poor fishery and aquaculture practices. And it is further undermined by a failure to incorporate the priorities and rights of small-scale fishing communities and the injustices relating to gender discrimination and child labour.”
Boosting governance
FAO is urging governments to make every effort to ensure sustainable fisheries around the world. The report notes that many of the marine fish stocks monitored by FAO remain under great pressure. According to the latest statistics available, almost 30 percent of these fish stocks are overexploited – a slight decrease from the previous two years, about 57 percent are fully exploited (i.e. at or very close to their maximum sustainable production), and only about 13 percent are non-fully exploited. “Overexploitation not only causes negative ecological consequences, but it also reduces fish production, which leads to negative social and economic consequences,” the report says. “To increase the contribution of marine fisheries to the food security, economies and the well-being of coastal communities, effective management plans must be put in place to rebuild overexploited stocks.” Strengthened governance and effective fisheries management are required. The report argues that promoting sustainable fishing and fish farming can provide incentives for wider ecosystem stewardship and advocates enabling mechanisms such as the adoption of an ecosystem approach to fisheries and aquaculture with fair and responsible tenure systems.
Global fish production
Capture fisheries and aquaculture supplied the world with about 148 million tonnes of fish in 2010 valued at US$217.5 billion. Production growth from aquaculture keeps outpacing population growth, and it is one of the fastest-growing animal food-producing sectors – trends that are set to continue. Fish and fishery products are among the most-traded food commodities worldwide. Following a drop in 2009, world trade in fish and fishery products has resumed its upward trend driven by sustained demand, trade liberalization policies, globalization of food systems and technological innovations. Global trade reached a record US$109 billion in 2010 and 2011 points to another high estimated at US$125 billion.
Increase resilience, strengthen the sector
The report notes that the coming decades are likely to see major changes in economies, markets, resources and social conduct, where climate change impacts will increase uncertainty in many food sectors, including fisheries. It stresses the importance of the FAO Code of Conduct for Responsible Fisheries, and its associated international plans of action and technical guidelines, to achieving the goal of a global sustainable food production system. Small-scale fisheries employ more than 90 percent of the world’s capture fishers and are vital to food and nutrition security, poverty alleviation and poverty prevention. The FAO Committee on Fisheries has recommended developing international voluntary guidelines to contribute to policy development, secure small-scale fisheries and create benefits. Although women make up at least 50 percent of the workforce in inland fisheries and market as much as 60 percent of seafood in Asia and West Africa, their role is often undervalued and neglected. Here again, and as reaffirmed at Rio+20, the report shows that, in addition to working towards the UN Millennium Development Goal of gender equality and empowering women, mainstreaming gender is an essential component of alleviating poverty, achieving greater food and nutrition security, and enabling sustainable development of fisheries and aquaculture resources.
As fishers, fish farmers and their communities tend to be particularly vulnerable to disasters, the report examines approaches to improved preparedness for and effective response to disasters in fisheries and aquaculture. Emergency responses should strengthen food and nutrition security through the sustainable rehabilitation and long-term recovery of the fisheries and aquaculture sector and the livelihoods that depend on it, especially targeting women and other marginalized groups. “Enabling fisheries and aquaculture to flourish responsibly and sustainably requires the full involvement of civil society and the private sector,” says Mathiesen, adding: “Business and industry can help develop technologies and solutions, provide investment and engender positive transformation. Civil society and international and local non-governmental organizations can hold governments accountable on agreed commitments and ensure that the voices of all stakeholders are heard.”
Looking ahead
The primary threats undermining the food and nutrition security potential of fisheries and aquaculture result principally from ineffective management coupled with poor conservation of habitats. A transition towards people-centred approaches is required to enhance the sector’s contribution to food and livelihoods security. As underlined at the recent UN Conference on Sustainable Development, Rio+20, such a shift could spur the global community to achieve the real sustainable and responsible use of aquatic resources to meet today’s needs while ensuring benefits for future generations.
The full 2012 FAO State of World Fisheries and Aquaculture report is accessible at www.fao.org/docrep/016/i2727e/i2727e00.htm.
___________________________
AquaVetMed e-News provides information to veterinary and veterinary-allied subscribers concerning aquatic animal medicine, health, welfare, public health and seafood safety, obtained from a variety of sources (largely AquaVetMed subscribers). While provided by the American Veterinary Medical Association’s, Aquatic Veterinary Medicine Committee and are for public distribution, they do not necessarily reflect the opinion of the AVMA or the veterinary profession. See the AVMA Terms of Use (http://tinyurl.com/29h2rf) for further information.
If e-News information is used elsewhere please acknowledge AquaVetMed as the source. Encourage individuals to subscribe rather than distribute through list serves.
Messages may contain attachments that will have been scanned for known viruses.
Subscription and Contributions: Interested veterinarians and veterinary-allied professionals can subscribe, unsubscribe, or contribute pertinent news or information, by sending a message with “For AquaVetMed -” and the topic in the subject line, to dscarfe@avma.org.
Note: Undelivered e-mails will not be resent; Subscribers will be deleted from the list after repeated undelivered or bounced messages and will have to re-subscribe.
Visit our website: www.avma.org
________________________________
—
Follow me on: Twitter – Blog – Facebook – Linkedin – YouTube
Dr Richmond Loh
http://www.thefishvet.com.au
Ph: +61 (0)421 822 383
Method to overcome surface tension for larval swim-up stage.
At the “swim up” stage in the development of larval fish, they need to get to the water surface to inflate their swim bladder. Sometimes the surface tension of the water may be too great and they aren’t able to penetrate it. This paper details a method to improve survival of small larvae by the addition of egg white and camphor grain to the water.
| Aquaculture Research | |||||||||||||||||
| Volume 43, Number 8 (July 2012) | |||||||||||||||||
| |
Prevention of surface death of horse mackerel (Trachurus mediterraneus) larvae by the addition of egg white and camphor grain to rearing water | ||||||||||||||||
| Authors: | Ilhan Yandi 1, Ilhan Altinok 1 | ||||||||||||||||
| Author Affiliations: |
|
||||||||||||||||
| Source: | Aquaculture Research, Volume 43, Number 8 (July 2012) | ||||||||||||||||
| Page Numbers: | 1065 – 1070 | ||||||||||||||||
| Available Full Text: |
|
||||||||||||||||
| Abstract: | To prevent surface tension-related deaths in horse mackerel larvae, Trachurus mediterraneus, camphor grain (CG; 26 and 52 mg L-1with and without ethanol) and chicken egg white (EW; 40 and 80 µL L-1) were added to rearing water. Compared with the control groups, supplementation of EW (40–80 µL) and CG (52 mg L-1, dissolved in ethanol) significantly improved the survivals of horse mackerel larvae (P<0.05). At the end of the 10 days after hatching, the survival rates of EW-40 and EW-80 were 64% and 72% respectively. No clear correlation was found between surface tension and survival rate. | ||||||||||||||||
| Citation: | Ilhan Yandi, Ilhan Altinok . Prevention of surface death of horse mackerel (Trachurus mediterraneus) larvae by the addition of egg white and camphor grain to rearing water. Aquaculture Research, Volume 43, Number 8 (July 2012), pp. 1065-1070, <http://ejournals.ebsco.com/direct.asp?ArticleID=4BA390FA5ABB2118E41C> | ||||||||||||||||
| URL: | http://ejournals.ebsco.com/direct.asp?ArticleID=4BA390FA5ABB2118E41C | ||||||||||||||||
Fish Haematology pictures.
Following on from my previous posts about fish haematology (see link here), I’ve just uploaded some pictures of fish haematology.
I’ll be adding to it when I get the time. In the meantime, enjoy!
Follow this link http://www.facebook.com/media/set/?set=a.392480934134195.85320.188036301245327&type=3&l=19d8c40a6b
and LIKE it or SHARE it.
Sharks are older than trees!
Zoonotic Disease Pathogens in Fish Used for Pedicure.
Check out this recent paper:
Verner-Jeffreys DW, Baker-Austin C, Pond MJ, Rimmer GSE, Kerr R, Stone D, et al. Zoonotic disease pathogens in fish used for pedicure [letter]. Emerg Infect Dis [serial on the Internet]. 2012 Jun.
More emphasis needs to be placed on fish health for the management of marine fisheries.
Perhaps veterinarians can play a leading role in assessing fish health for the purpose of managing marine fisheries.
| Reviews in Fisheries Science | |||||||||||||||||
| Volume 20, Number 3 (July 2012) | |||||||||||||||||
| |
Fish Health and Fisheries, Implications for Stock Assessment and Management: The Mediterranean Example | ||||||||||||||||
| Authors: | J. Lloret 1, E. Faliex 2, G.E. Shulman 3, J.-A. Raga 4, P. Sasal 5, M. Muñoz 1, M. Casadevall 1, A.E. Ahuir-Baraja 4, F.E. Montero 4, A. Repullés-Albelda 4, M. Cardinale 6, H.-J. Rätz 7, S. Vila 1, D. Ferrer 1 | ||||||||||||||||
| Author Affiliations: |
|
||||||||||||||||
| Source: | Reviews in Fisheries Science, Volume 20, Number 3 (July 2012) | ||||||||||||||||
| Page Numbers: | 165 – 180 | ||||||||||||||||
| Available Full Text: |
|
||||||||||||||||
| Abstract: | Although fish health may influence key population-level processes, particularly those dealing with natural mortality, reproduction, and growth, which, in turn, affect stock productivity, little emphasis has been placed on the links between fish health and the management of marine fisheries. This article addresses this gap and illustrates how knowledge of fish health could provide insight for marine fisheries biologists, stock assessment modelers, and managers. The study proposes ways in which the consideration of condition indicators (energy reserves) and parasitism improves stock assessment and fisheries management, especially in situations of data shortage when standard methods cannot be applied, as is the case in many Mediterranean fish stocks. This article focuses on seven case studies of different fish species from the Mediterranean and Black Seas. Overall, and although the relationship between fish health and productivity cannot always be found or quantified, the article emphasizes the importance of the physical health of exploited stocks, particularly during critical life periods of the fish (e.g., prior to spawning, migration, or in the early life stages), as an essential element of sustainable and profitable fisheries. On the basis of these results, stock assessment and fisheries management implications are discussed. | ||||||||||||||||
| Citation: | J. Lloret, E. Faliex, G.E. Shulman, J.-A. Raga, P. Sasal, M. Muñoz, M. Casadevall, A.E. Ahuir-Baraja, F.E. Montero, A. Repullés-Albelda, M. Cardinale, H.-J. Rätz, S. Vila, D. Ferrer . Fish Health and Fisheries, Implications for Stock Assessment and Management: The Mediterranean Example. Reviews in Fisheries Science, Volume 20, Number 3 (July 2012), pp. 165-180, <http://ejournals.ebsco.com/direct.asp?ArticleID=421B8A58189FA7A444C7> | ||||||||||||||||
| URL: | http://ejournals.ebsco.com/direct.asp?ArticleID=421B8A58189FA7A444C7 | ||||||||||||||||
Nemo faces an acid test in real-life movie sequel.
Townsville-based James Cook University researcher Phillip Munday and his team found clown fish, as well as damsel fish and open-water predators like tuna and spanish mackerel, suffered adverse effects under high acidity.
They said laboratory studies showed increased acid levels affected the main neuro-transmitters in fish brains, causing a malfunction in the sense of smell, hearing and perception of risk, and an increased tendency to stray from safe reef areas.