title: Study on the gill of field crab, Paratelphusa hydrodromus (Herbst.) exposed to nickel.
abstract: Paratelphusa hydrodromus (Herbst.) was exposed to 50 ppm nickel chloride solution for a period of 10 days under laboratory conditions. The gills of the treated and non-treated animals were sectioned, stained and examined under a compound microscope and noticed significant changes such as enlargement of gill lamellae, lifting up and rupture of epithelial cells, enlargement of mid rachis, hyperplasia and hypertrophy, appearance of pyknotic nuclei and a general necrosis in the treated gills. Results suggest that a comparatively low concentration of nickel (50 ppm) is enough to elicit pathological changes in Paratelphusa hydrodromus.
authors.affiliation: Department of Aquatic Biology and Fisheries, University of Kerala, Kariavattom, Thiruvananthapuram-695 581, India.
authors.forename: Kurian Mathew
authors.initials: KM
authors.lastname: Abraham
authors.forename: Tresa
authors.initials: T
authors.lastname: Radhakrishnan
mesh_terms: D000818:Animals; D003386:Brachyura / Q000502:physiology*; D005880:Gills / Q000187:drug effects / Q000473:pathology*; D009336:Necrosis; D009532:Nickel / Q000009:adverse effects*; D014873:Water Pollutants / Q000009:adverse effects*
chemical_list: D014873:Water Pollutants; D009532:Nickel