Some effects of oral doses of oxytetracycline on growth, survival and disease in Penaeus aztecus

Jane Corliss, Donald V Lightner, Zoula P. Zein-Eldin

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Abstract

Two size groups of brown shrimp (Penaeus aztecus) were fed a formulated feed containing 0, 100, 1 000 or 5 000 mg of oxytetracycline/kg of feed. Growth and survival were measured after a 3-week drug consumption period. The shrimp were then inoculated with Vibrio alginolyticus, and survival was monitored during the following 24 h. At all three concentrations of oxytetracycline, small shrimp (mean initial wet weight 143.4 mg) consumed approximately one-third the amount of feed consumed by those fed the control diet with no oxytetracycline, yet growth was more rapid with diets containing 100 and 1 000 mg of oxytetracycline/kg of food than with the control diet. Larger shrimp (mean initial wet weight 458.1 mg) receiving oxytetracycline consumed about one-fourth the feed consumed by those on the oxytetracycline-free diet. Some growth inhibition was apparent in these shrimp at all oxytetracycline concentrations. Maximum drug consumption rate, based on actual feed intake, was approximately 1 300 mg oxytetracycline per kg body weight per day for small shrimp, but only 370 mg per kg body weight per day for larger shrimp. All shrimp fed 0, 100 or 1 000 mg of oxytetracycline/kg of feed died within 24 h following inoculation with a standard dose (70% light transmission at 520-540 nm) of Vibrio alginolyticus. All the small shrimp and 70% of the large shrimp fed at the 5 000-mg drug level died, but death generally took place later in the 24-h period than with those fed at the lower drug concentrations. All shrimp fed 5 000 mg oxytetracycline/kg of feed and inoculated with a 1 : 100 dilution of the standard dose of Vibrio alginolyticus survived. All small shrimp and 90% of the large shrimp survived injection of sterile saline.

Original languageEnglish (US)
Pages (from-to)355-362
Number of pages8
JournalAquaculture
Volume11
Issue number4
DOIs
StatePublished - 1977

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Farfantepenaeus aztecus
oxytetracycline
mouth
shrimp
dosage
drug
Vibrio alginolyticus
diet
drugs
effect
dose
group size
inoculation
body weight
dilution

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Some effects of oral doses of oxytetracycline on growth, survival and disease in Penaeus aztecus. / Corliss, Jane; Lightner, Donald V; Zein-Eldin, Zoula P.

In: Aquaculture, Vol. 11, No. 4, 1977, p. 355-362.

Research output: Contribution to journalArticle

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