Effects of seasonal variations, thyroid and steroid hormones, and carp pituitary extract on the artificial production of channel catfish Ictalurus punctatus × blue catfish I. furcatus hybrids

Dayton M. Lambert, Brad J. Argue, Zhanjiang Liu, Rex A. Dunham

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

The primary objective was to compare thyroid hormones and levels of carp pituitary extract for the artificial production of female Ictalurus punctatus × male I. furcatus hybrid catfish. The effects of different carp pituitary extract dosage rates (5, 6, 9, and 10 mg/kg), carp pituitary extract (6 and 10 mg/ kg) supplemented with the thyroid hormones thyroxine (T4) and triiodothyronine (T3), or pregnenolone (DHP) were determined for inducing ovulation of female channel catfish, fertilization of channel catfish eggs with male blue catfish sperm, and hatching rate of these embryos. Hormone treatments thyroxine and triiodothyronine with carp pituitary extract, carp pituitary extract alone, and pregnenolone with carp pituitary extract used to artificially produce hybrid catfish were not different in terms of ovulation rates, eggs/kg, fry/ kg body weight of female channel catfish, fertilization rates, or hatching rates (P > 0.05). These findings suggest that lower amounts of carp pituitary extract may be used to induce spawn of female channel catfish for production of channel-blue catfish hybrids and the addition of thyroid and steroid hormones is ineffective at the rates used in this study.

Original languageEnglish (US)
Pages (from-to)80-89
Number of pages10
JournalJournal of the World Aquaculture Society
Volume30
Issue number1
DOIs
StatePublished - Jan 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Aquatic Science
  • Agronomy and Crop Science

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