Elevated selenium levels in bluegills and their effect on reproduction. [Lepomis macrochirus]
A series of 18 artificial crosses of bluegills, Lepomis macrochirus, from Hyco Reservoir, North Carolina (mean Se = 7.94 ppm) and Roxboro City Lake, North Carolina (mean Se = 0.38 ppm) were generated. Neither percent fertilization nor percent hatch differed significantly among the parent combinations. However, all crosses of females with high Se body burdens resulted in larvae with edema; larvae from all crosses of females with low Se body burdens were normal. No differences were found in morphology of the membranes from immature ova between females of the two reservoirs. Sections of heart and intestines appear similar between larvae from females of Hyco Reservoir and Roxboro City Lake suggesting that edema occurs from physiological impairment and not from developmental abnormalities. Mean Se levels in the gonads and carcass of adult bluegills were more than 20 times higher in fishes from Hyco Reservoir than in those from Roxboro City Lake. The high Se concentration in ovaries of Hyco Reservoir bluegills, coupled with high Se levels in larvae from artificial crosses indicated that Se was transferred from females to offspring and resulted in larval edema. /sup 75/Se-selenomethionine was fed to adult bluegills. After 12 weeks of feeding, liver and testis had the highest /sup 75/Se activities according to gamma activity assays while ovary, heart and skeletal muscle had the lowest activities.
- Research Organization:
- Ohio State Univ., Columbus (USA)
- OSTI ID:
- 5242645
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FISHES
FERTILIZATION
HATCHING
SELENIUM
BIOLOGICAL ACCUMULATION
TISSUE DISTRIBUTION
TOXICITY
BODY BURDEN
EDEMA
ENVIRONMENTAL EXPOSURE PATHWAY
EXPERIMENTAL DATA
GONADS
HEART
INTESTINES
LABELLED COMPOUNDS
LARVAE
LIVER
METHIONINE
MUSCLES
NORTH CAROLINA
OVA
OVARIES
SELENIUM 75
TESTES
TRACER TECHNIQUES
WATER POLLUTION
AMINO ACIDS
ANIMALS
AQUATIC ORGANISMS
BETA DECAY RADIOISOTOPES
BODY
CARBOXYLIC ACIDS
CARDIOVASCULAR SYSTEM
DATA
DAYS LIVING RADIOISOTOPES
DIGESTIVE SYSTEM
DISTRIBUTION
DRUGS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
EVEN-ODD NUCLEI
FEDERAL REGION IV
FEMALE GENITALS
GAMETES
GASTROINTESTINAL TRACT
GERM CELLS
GLANDS
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPE APPLICATIONS
ISOTOPES
LIPOTROPIC FACTORS
MALE GENITALS
NORTH AMERICA
NUCLEI
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
ORGANS
PATHOLOGICAL CHANGES
POLLUTION
RADIOISOTOPES
SELENIUM ISOTOPES
SEMIMETALS
SYMPTOMS
USA
VERTEBRATES
560304* - Chemicals Metabolism & Toxicology- Invertebrates- (-1987)