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Titolo:
The effects of organic and inorganic phosphates on fertilization and earlydevelopment in the sea urchin Lytechinus variegatus (Echinodermata : Echinoidea)
Autore:
Bottger, SA; McClintock, JB;
Indirizzi:
Univ Alabama, Dept Biol, Birmingham, AL 35294 USA Univ Alabama BirminghamAL USA 35294 Dept Biol, Birmingham, AL 35294 USA
Titolo Testata:
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
fascicolo: 4, volume: 129, anno: 2001,
pagine: 307 - 315
SICI:
1532-0456(200108)129:4<307:TEOOAI>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPERM CELL; EFFLUENT; BIOASSAY; HYPOXIA; MEXICO; WATERS; GULF; EGGS; BAY;
Keywords:
sea urchin; Lytechinus variegatus; sodium phosphate; triethyl phosphate; anthropogenic pollution; fertilization; development; environmental toxicology;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Bottger, SA Univ Alabama, Dept Biol, Birmingham, AL 35294 USA Univ Alabama Birmingham AL USA 35294 Birmingham, AL 35294 USA
Citazione:
S.A. Bottger e J.B. McClintock, "The effects of organic and inorganic phosphates on fertilization and earlydevelopment in the sea urchin Lytechinus variegatus (Echinodermata : Echinoidea)", COMP BIOC C, 129(4), 2001, pp. 307-315

Abstract

The embryos of the sea urchin Lytechinus variegatus are capable of surviving chronic exposure to inorganic sodium phosphate and organic triethyl phosphate concentrations as high as 6 and 1000 mg l(-1) seawater, respectively. However, chronic exposure to sub-lethal concentrations of these phosphatesmay cause arrested or abnormal embryonic development. We measured fertilization success and percentages of normal, arrested and abnormal embryos exposed to low, medium and high sub-lethal concentrations of inorganic and organic phosphate. Fertilization success was significantly reduced in all phosphate treatments. After attaining the 4-cell stage, embryos exposed to the highest phosphate concentrations displayed arrested development. Percentagesof abnormally developing embryos showed a strong concentration dose-response with a significant increase in abnormal embryonic development with increasing phosphate concentration. Overall, these results indicate that the gametes and embryos of L. variegatus may provide a rapid and sensitive model bioassay for the evaluation of phosphate pollutants in marine systems. Our findings also indicate that shallow-water populations of L. variegatus spawning in areas subjected to inorganic and organic phosphate pollutants may suffer detrimental effects on fertilization and embryonic development. (C) 2001 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 23:09:32