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Titolo:
Treatments for ich infestations in channel catfish evaluated under static and flow-through water conditions
Autore:
Tieman, DM; Goodwin, AE;
Indirizzi:
Univ Arkansas, Dept Aquaculture Fisheries, Pine Bluff, AR 71601 USA Univ Arkansas Pine Bluff AR USA 71601 Fisheries, Pine Bluff, AR 71601 USA
Titolo Testata:
NORTH AMERICAN JOURNAL OF AQUACULTURE
fascicolo: 4, volume: 63, anno: 2001,
pagine: 293 - 299
SICI:
1522-2055(200110)63:4<293:TFIIIC>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ICHTHYOPHTHIRIUS-MULTIFILIIS FOUQUET; MALACHITE GREEN; FISH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Goodwin, AE Univ Arkansas, Dept Aquaculture Fisheries, Mail Slot 4912,1200N Univ Dr, Pine Bluff, AR 71601 USA Univ Arkansas Mail Slot 4912,1200 N Univ Dr Pine Bluff AR USA 71601
Citazione:
D.M. Tieman e A.E. Goodwin, "Treatments for ich infestations in channel catfish evaluated under static and flow-through water conditions", N AM J AQUA, 63(4), 2001, pp. 293-299

Abstract

In response to producer reports of poor efficacy using published treatments against Ichthyophthirius multifiliis (ich) infestations of channel catfish Ictalurus punctatus, we initiated a preliminary study to see which of thecompounds that are permissible in food-fish aquaculture were efficacious under what we judged to be ideal laboratory conditions. We planned to use the results of this work as a basis for further study in the field. In our studies we used fingerling catfish in glass aquariums with stable water quality and daily treatments in both static and flow-through water systems. In some experiments, infested fish and healthy fish were stocked together so that the ability of the treatment to eliminate preexisting infestations couldbe examined separately from the treatment's ability to block transmission. Malachite green and methylene blue were used as positive controls, and untreated fish were used as the negative control for efficacy. Treatments withsodium chloride, hydrogen peroxide, potassium permanganate, elevated temperatures, chloramine-T, povidone iodine, and high flow rates were ineffective under all conditions and concentrations tested. Alternate-day treatments with formalin at 25 and 50 mg/L in static water or 100 mg/L in flow-throughwater aquariums were not effective at eliminating infestations or preventing fish-to-fish transmission. Daily treatments with 50 mg/L formalin in static water or 100 mg/L formalin in flow-th-rough water aquariums were toxic to channel catfish. Formalin at 25 mg/L in static water aquariums was effective at eliminating infestations and reducing fish-to-fish transmission when used as a daily treatment. Copper sulfate was effective in blocking the infestation of healthy fish, but it did not eliminate established infestations on channel catfish, even after 20 daily treatments under static conditions. Malachite green and methylene blue eliminated established infestations on fish, whereas copper only prevented transmission; this suggests that thedyes are able to penetrate deeply or act systemically, allowing them to kill subcutaneous stages of ich. Further field trials were not pursued because none of the legal or economically viable treatments showed efficacy underpresumably ideal laboratory conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/03/20 alle ore 09:11:25