Tuesday, 10 April 2018

Koi Herpesvirus of the family Herpesviridae

Koi Herpesvirus Disease is a viral disease of common carp Cyprinus carpio, including all its ornamental varieties such as koi, ghost koi etc. The virus is highly contagious and may cause up to 100% mortality. KHV has already caused severe fish losses to ornamental wholesalers, retailers and carp fishery owners and continues to pose a significant threat to anyone dealing with or keeping common carp.

As a notifiable disease there is a legal obligation to report any suspicion of a clinical outbreak of Koi Herpesvirus Disease to the Fish Health Inspectorate (FHI). If the disease is found to be present the FHI will advise on the most appropriate methods of control.

 
Koi Herpes Virus Disease  (FHI)


Viral haemorrhagic septicaemia virus (VHSV)
Viral Haemorrhagic Septicaemia Virus (VHSV) is an important fish virus that has caused several large-scale fish kills in both fresh and saltwater fish in farmed and wild fish. Viral haemorrhagic septicaemia (VHS) is a highly infectious virus disease predominantly affecting rainbow trout (Oncorhynchus mykiss) in aquaculture.

The virus is an enveloped negative-stranded RNA virus belonging to the family Rhabdoviridae and the genus Novirhabdovirus. The virus can be divided into 4 distinct genotypes and 10 subtypes with different geographical occurrence, host range and infectivity patterns. VHSV have been isolated in the tempered Northern hemisphere, e.g. North America, Asia and Europe. The disease occurs endemically in the continental part of Europe, in Turkeyand in part of Finland. Occasionally outbreaks in farmed rainbow trout and turbot have occurred in Scandinavia and the British Isles. The North Sea, Kattegat and the Baltic Seahouses endemically infected populations of wild fish. VHSV have been isolated from more than 82 different fish species.


 Viral Haemorrhagic septicaemia virus (OIE)


Infectious haematopoietic necrosis virus(IHNV)
Infectious haematopoietic necrosis (IHN) is a viral disease affecting most species of salmonid fish. Caused by the rhabdovirus, infectious haematopoietic necrosis virus (IHNV), the principal clinical and economic consequences of IHN occur on farms rearing fry or juvenile rainbow trout in freshwater where acute outbreaks can result in very high mortality. However, both Pacific and Atlantic salmon reared in fresh water or sea water can be severely affected.

Infectious hematopoietic necrosis virus (IHNV), is a negative-sense single-stranded RNA virus that is a member of the familyRhabdoviridaeand the genusNovirhabdovirus,like VHSV. IHNV is present inUSAandCanada, inJapanandKoreaand in the continental part ofEurope.

Both VHS and IHN are listed as non-exotic diseases in the EU and are therefore watched closely by the European Community Reference Laboratory for Fish Diseases, and by National Reference Laboratories.


Monday, 9 April 2018

Salmon

Salmon
Most salmon farms hold more than one-half million fish penned in open net-cages, mostly Atlantic salmon. There are over 100 open net-cage farms growing farmed salmon in sheltered bays along the British Columbia coast.
Waste, chemicals, disease, and parasites from the farms pass through the mesh and pollute the surrounding water and seabed. Especially harmful are the sea lice who attach to wild juvenile salmon on their migration out to sea. Too many sea lice can kill the young wild salmon.
Storms, accidents and predators can tear the nets allowing the farmed fish to escape. Predators like seals and sea lions are often shot. Many marine mammals get entangled in the nets and drown.

King (chinook): The lushest fresh salmon, king is the highest in fat and usually the most expensive, prized for its silken, melting texture, which is almost like smoked salmon.

Kingdom:    Animalia
Phylum:      Chordata
Class: Actinopterygii
Order:         Salmoniformes
Family:       Salmonidae
Genus:        Oncorhynchus
Species:      O. tshawytscha
Binomial name: Oncorhynchus tshawytscha
Ocean

Freshwater


Sockeye (red): With a deep, natural color, sockeye is lower in fat but still high overall, allowing the flavor to better come through. Many salmon lovers, including me, consider this the best salmon-eating experience.

Kingdom:    Animalia
Phylum:      Chordata
Class: Actinopterygii
Order:         Salmoniformes
Family:       Salmonidae
Genus:        Oncorhynchus
Species:      O. nerka
Binomial name: Oncorhynchus nerka

sockeye

Coho (silver): A comer, according to Bill Webber and Thea Thomas, independent Cordovan fishermen. It’s already prized by sport fishermen for its fight, and soon, the Cordovans hope, by diners for its mild but distinctive flavor. The most widely available autumn fresh salmon.

Kingdom:    Animalia
Phylum:      Chordata
Class: Actinopterygii
Order:         Salmoniformes
Family:       Salmonidae
Genus:        Oncorhynchus
Species:      O. kisutch
Binomial name: Oncorhynchus kisutch
Coho Salmon

Pink (humpback): So delicate and pale that Thomas compares it to sole—which she does not mean as a compliment. She recalls a tasting for food writers at which many rated pink the highest. “How could they?” she asks. The likely answer: “A lot of these people had never had salmon in their life.”

Kingdom:    Animalia
Phylum:      Chordata
Class: Actinopterygii
Order:         Salmoniformes
Family:       Salmonidae
Genus:        Oncorhynchus
Species:      O. gorbuscha
Binomial name: Oncorhynchus gorbuscha
Pink Salmon

Chum (dog): Like pink, chum is fished in high numbers and is lower in fat than other varieties; when it spawns in intertidal waters, it doesn’t need to build up energy to swim upstream. Its roe, however, is the most valued of the five varieties, because of its size and flavor. After being strained and separated, the eggs make particularly good ikura— the fat, bright-orange pearls familiar in sushi rolls.

Kingdom:    Animalia
Phylum:      Chordata
Class: Actinopterygii
Order:         Salmoniformes
Family:       Salmonidae
Genus:        Oncorhynchus
Species:      O. keta
Binomial name: Oncorhynchus keta
Chum Salmon




Tuesday, 3 April 2018

Argulus foliaceus



Argulus foliaceus

Kingdom:    Animalia
Phylum:      Arthropoda
Subphylum: Crustacea
Class:            Maxillopoda
Subclass:     Branchiura
Order:         Arguloida
Family:       Argulidae
Genus:        Argulus
Species:      Argulus foliaceus

 
the common fish louse, lives in marine, brackish, and freshwater environments. usually a fish, via its suction cups, pierces the skin with its sharp stylet, and feeds on blood. A heavy infestation causes inflammation of the skin, open hemorrhaging wounds, increased production of mucus, loss of scales, and corrosion of the fins. The fish can become anemic. The damage and infection cause stress and mortality.

Argulus is very flat with an oval or rounded carapace, two compound eyes, sucking mouthparts with a piercing stylet, and two suction cups it uses to attach to its host. Its paired appendages have hooks and spines and are used for swimming.

Thursday, 29 March 2018


Flavobacterium columnare in Tilapia

Columnaris disease was first reported by Davis in 1922. This is also called as saddleback disease, cotton-wool disease, cotton-mouth disease, and fin rot. Tilapia is native to Africa and the Middle East. Tilapia immune responses and the rates of pathogen replication are usually correlated with water temperature. Generally, infected fish will show signs of bleeding or have wounds along its body. Flavobacterium columnare are long, thin, gram-negative, aerobic, microaerophilic, or anaerobic gliding rod

Kingdom:  Bacteria
Phylum:     Bacteroidetes
Class:         Flavobacteria
Order:        Flavobacteriales
Family:      Flavobacteriaceae
Genus:        Flavobacterium
Species:       F. columnare



Important infectious diseases such as bacterial and viral diseases. Bacterial infection is usually associated with poor water quality, low dissolved oxygen, crowding and improper handling.






Oreochromis mossambicus

There is a large number of new species being farmed, but only relatively few have
been successful over a long period of time. The criteria for succeeding are complex
and usually a combination of biological and economical factors. Aquaculture is a
relatively new industry in Europe; commercial cage culture only started in the second
half of the 20th century with the salmon and trout industry. Hatching of juveniles,
however, has a longer tradition as it has been used for restocking of rivers and lakes
for recreational fishing. Capturing of mature fish before spawning has been practiced
with species like salmon, cod and white fish to obtain artificially produced larvae. Using
more extensive rearing methods like lagoons and ponds allowed larval production
under conditions closely resembling the natural habitats, including algal blooms and
production of natural zooplankton. Larvae or juveniles were released in the sea,
lakes or rivers in an attempt to augment the natural populations. For commercial
production it was necessary to intensify operations feeding of juveniles was started
using live plankton of rotifers and artemia in intensive cultures. Production technology
has moved indoors to be able to maintain full control of the production cycle.



Saturday, 24 March 2018



Fishery is the kind of industry which includes catching and selling of fishes for the purpose of food, medicine and research. Other than marine water fisheries there are fresh water fisheries as well. There are two types of waters, namely, the fresh and the brackish. The fresh water sources are irrigation canals, reservoirs, lakes, tanks, pondsThe estuaries, lagoons and mangrove swamps constitute the brackish type of water.

Thursday, 8 February 2018

Aquaculture Research 2018

About Conference


PULSUS brings in a new spin on conferences by presenting the latest scientific improvements in your field. Listen to motivating keynotes from thought leaders, or rub elbows with pioneers across the globe. Madrid is all set for an amazing event as PULSUS proudly presents the “World Congress on Recent Advances in Aquaculture Research & Fisheries” slated on August 20-21, 2018 at Rome,Italy. The theme of the conference is “Sustainable Aquaculture & Fishery”.

Fisheries and aquaculture is an essential resources for food, nutrition, income and employment for billions of people all over the globe. Studies State that fish accounted for about 17% of the world population’s intake of animal protein and 6.7% of all protein intake. In addition, fish provided more than 3.1 billion humans with almost 20% of their average per capita intake of animal protein. It is an important source of essential fats (e.g. long-chain omega-3 fatty acids), vitamins (D, A and B) and minerals (including calcium, iodine, zinc, iron and selenium), particularly if eaten whole. World aquaculture production of fish accounted for 44.1% of whole production (including for non-food uses) from capture fisheries and aquaculture in 2014. Coastal habitats (e.g. mangroves and marshes), geographic information systems (GIS) and remote sensing are more and more facilitating the differentiation and process of vegetation types important for establishing baselines and monitoring change. 

Conference Highlights