Freshwater fish

In order to help the performance of US catfish farmers, scientists at the USDA Agricultural Research Service are examining breeding, nutrition, genetics, and management practices to produce better hybrid catfish.

Tra catfish (Pangasius hypophthalmus) is a dominant cultured species in Vietnam in terms of production. Its aquaculture production in 2011 was approximate 1.2 million metric tons. The main culture system for tra catfish is intensive model in earthen ponds with…

During Aquaculture Europe 2013, Kamaran S. Mama and Shamall M. A. Abdullah, University Salahaddin, Iraq, presented their study on the ciliated protozoans that infected common carp from Ainkawa fish hatchery in Erbil city, Kurdistan region, Iraq.

Speaking at the 150th Annual AVMA Convention in Chicago, US, Nicholas Saint-Erne, DVM PetSmart, Phoenix, Arizona, gave an insight into ornamental koi carp.

Cutaneous ulcers in koi are one of the most common complaints for which the fish practitioner is called upon, writes Julius M. Tepper, DVMLong Island Fish Hospital, Manorville, New York, while speaking at the 150th Annual AVMA Convention in Chicago, US.

Cryopreservation is a process to maintain genetic material (such as spermatozoa) in subzero freezing. Abinawanto Zuraidah and Retno Lestari, University of Indonesia, disscussed the effect of skimmed milk on spermatozoa quality of silver barb (Barbonymus gonion…

This article provides a quick guide to breeding males for tilapia farming and best practice for hatchery, grow out and slaughter, writes Lucy Towers, editor of TheFishSite.

This study, by Ibrahim Diler et al, Suleyman Demirel University, Turkey, is the first trial to evaluate algae meal, Ulva rigida, as an inexpensive and locally available feed ingredient in the diet of common carp, Cyprinus carpio.

Koi herpesvirus (KHV) is a highly contagious virus that causes significant morbidity and mortality in common carp (Cyprinus carpio) varieties (Hedrick et al. 2000, Haenen et al. 2004). Common carp is raised as a foodfish in many countries and has also been sel…

One of the most common problems of tropical and ornamental fishes are those caused by parasites. Fish parasites include protozoans, trematodes, cestodes, nematodes, acanthocephalans, crustaceans and arthropods, said Stephen A. Smith, Virginia Tech, speaking at…

In a 12-week indoor feeding trial by A. M. Abdelhamid, Al-Mansourah University and A. A. Soliman, Egypt National Institute of Oceanography and Fisheries, common carp fry were fed dietary graded levels (0, 1, and 2 per cent) of various medicinal plants to see w…

Aflatoxins are known as a hepatocarcinogen in various animal species, including fish. The present study, by Dr Ahmed Ismail Mohamed Mehrim from Mansoura University, Egypt, was designed to evaluate the ability of some medicinal herbs against aflatoxicosis regar…

The catfish industry has experienced a dramatic downsizing in the last several years in large part because of rapidly increasing feed cost. This increased cost is directly correlated to the increased price of soybean meal and corn the primary feedstuffs in cat…

To study the effect of dietary inclusion of graded levels (0, 1, 2 %) of Fenugreek seed meal (FSM) or Cresson seeds meal (CSM)on Nile tilapia fry performance, A.M. Abdelhamid and A.A.A. Soliman, Al-Mansoura University, Egypt conducted an indoor feeding trial w…

The yellow coloration in catfish fillets caused by carotenoids does not affect flavor, but many consumers see the yellowish fillets as inferior. Taken from the Global Aquaculture Advocate, a Global Aquaculture Alliance publication.

Hydroferrate fluid, MRN-100, an iron-based compound derived from bivalent and trivalent ferrates, is a potent antioxidant compound. Mamdooh GHONEUM, Charles Drew University of Medicine and Science, US, et al examined the protective effect of MRN-100 against ga…

Comparative genomics is a powerful tool to transfer genomic information from model species to related nonmodel species. Yu Zhang et al, Auburn University, chose catfish linkage group 8, which was found to contain microsatellite markers associated with the tole…

Lab studies with channel catfish and rainbow trout have found that phytogenic feed additives can help improve weight gain, feed conversion and immunity to disease. A pond study in Mississippi, USA, by Brian C. Peterson, USDA, et al compared the performance of …

F.F. Khalil, Ahmed Ismail Mehrim and Montaha E.M. Hassan, Al-Mansoura University, Egypt, have evaluated the effects of graded levels of a new commercial probiotic, Hydroyeast Aquaculture, on both sexes of adult Nile tilapia. The probiotic was found to be usefu…

In an indoor feeding trial of Nile tilapia fish fry, A.M. Abdelhamid, Al-Mansourah University, Egypt and A.A.A. Soliman, National Institute of Oceanography and Fisheries, Egypt found that guava tree leaves meal (GTLM) and camphor tree leaves meal (CTLM) both h…

This factsheet by the Southern Regional Aquaculture Center (SRAC) gives information on what feeds and feed ingredients should be used for channel catfish.

For a variety of reasons, many humans choose to adopt children. More surprisingly, adoption is fairly widespread in the animal kingdom, even though it would seem to counteract the basic premise of Darwins theory of evolution, which suggests that animals should…

Commercial diets for channel catfish (Ictalurus punctatus) are typically composed of protein and energy sources of plant origin supplemented with lysine, vitamins, and minerals. A small amount of animal protein may be included. The predominant protein source i…

There has been increasing interest in growing hybrid catfish (female channel catfish Ictalurus punctatus male blue catfish I. furcatus) in Mississippi and the Southeastern region of the United States. Data presented in this report evaluate dietary protein leve…

Extending the shelf life of fresh catfish fillets would make it possible for catfish producers to increase the length of time in the supply chain and make it more feasible for processors to produce fresh, never-frozen, tray-packed products that can be sold in …

Although antibiotic growth promoters in the diets of fish may promote growth and improve feed conversion and survival rates, public concern over cross-resistance to humans led to a ban on the use of such substances in the EU. Research has thus turned to other …

In a study, tilapia were fed fish oil or vegetable oil based diets for five months, then switched to a fish oil finishing diet for three months. Results showed growth and feeding efficiencies were not significantly compromised, writes Nicholas Romano et al, Un…

USDA, along with the American Soybean Association (ASA) and the Fisheries Development Board (FDB), has funded a three year aquaculture project FEEDing Pakistan with an initiative to improve the livelihood of Pakistan farmers and consumers through increased aqu…

Ruth Francis-Floyd, University of Florida IFAS extension looks at successful fish health management. The document provides and introduction to disease, the types of fish diseases and what to do if fish are sick.