Cadmium exposures during early development: Do they lead to reproductive impairment in fathead minnows?

Marlo K. Sellin, Alan S. Kolok

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The primary objective of this study was to determine whether cadmium (Cd) exposures during embryonic and larval development alter the reproductive performance, reproductive physiology, and sex ratio of fathead minnows (Pimephales promelas). Embryonic exposures were conducted by exposing adult female fathead minnows to 0, 25, or 100 μg/L Cd for 8 d prior to breeding. Larval exposures were conducted by exposing the larvae to waterborne Cd at 0, 12.5, 25, or 50 μg/L from 8 to 29 d posthatch (the time period associated with female sexual differentiation). Minnows from each exposure period were raised to maturity, at which time their reproductive success, secondary sexual characteristics, gonadosomatic index (GSI), plasma 11-ketotestosterone (11-KT) concentrations, and sex ratios were assessed. Results from the embryonic study reveal that Cd exposures alter the secondary sexual characteristics of male fathead minnows but do not alter reproductive performance, GSI, 11-KT concentrations, or sex ratios. Larval exposures, during the period of female sexual differentiation, significantly reduce the frequency of adult spawning and increase clutch size but do not alter fecundity, secondary sexual characteristics, GSI, or 11-KT. Subtle alterations in sex ratio were observed, indicating that larval Cd exposures may increase the proportion of females in an exposed population.

Original languageEnglish (US)
Pages (from-to)2957-2963
Number of pages7
JournalEnvironmental Toxicology and Chemistry
Volume25
Issue number11
DOIs
StatePublished - Nov 1 2006

Fingerprint

Cyprinidae
Cadmium
Sex Ratio
cadmium
secondary sexual characteristics
sex ratio
Sex Differentiation
Clutch Size
Clutches
Physiology
Embryonic Development
Breeding
Fertility
Larva
embryonic development
clutch size
larval development
exposure
Plasmas
reproductive success

Keywords

  • Cadmium
  • Early development
  • Fathead minnow
  • Reproduction
  • Sex ratio

ASJC Scopus subject areas

  • Environmental Chemistry
  • Health, Toxicology and Mutagenesis

Cite this

Cadmium exposures during early development : Do they lead to reproductive impairment in fathead minnows? / Sellin, Marlo K.; Kolok, Alan S.

In: Environmental Toxicology and Chemistry, Vol. 25, No. 11, 01.11.2006, p. 2957-2963.

Research output: Contribution to journalArticle

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