title: Effect of heavy oil on the development of the nervous system of floating and sinking teleost eggs.
abstract: Heavy oil (HO) on the sea surface penetrates into fish eggs and prevents the normal morphogenesis. To identify the toxicological effects of HO in the context of the egg types, we performed exposure experiments using floating eggs and sinking eggs. In the course of development, HO-exposed embryos of floating eggs showed abnormal morphology, whereas early larva of the sinking eggs had almost normal morphology. However, the developing peripheral nervous system of sinking eggs showed abnormal projections. These findings suggest that HO exposed fishes have problems in the developing neurons, although they have no morphological malformations. Through these observations, we conclude that HO is strongly toxic to floating eggs in the morphogenesis, and also affect the neuron development in both floating and sinking eggs.
authors.affiliation: Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan.
authors.forename: Kouta
authors.initials: K
authors.lastname: Irie
authors.forename: Masahumi
authors.initials: M
authors.lastname: Kawaguchi
authors.forename: Kaori
authors.initials: K
authors.lastname: Mizuno
authors.forename: Jun-Young
authors.initials: JY
authors.lastname: Song
authors.forename: Kei
authors.initials: K
authors.lastname: Nakayama
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Kitamura
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Murakami
mesh_terms: D000818:Animals; D005399:Fishes / Q000196:embryology*; D009420:Nervous System / Q000187:drug effects* / Q000196:embryology; D009474:Neurons / Q000187:drug effects; D010063:Ovum / Q000187:drug effects* / Q000254:growth & development; D010578:Petroleum / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D010578:Petroleum; D014874:Water Pollutants, Chemical