The average lethal concentration of un‐ionized ammonia (48‐h LC50NH3) has been
determined by the static assay for larvae (0.48 mg l− 1) and alevins (0.92 mg l− 1) of …

This chapter discusses electrophoretic studies, acetylcholinesterase activity, optomotor
behavioral changes, histopathology with a light microscope, magnified structures with …

Transmission electron microscopy study of the gills of Heteropneustes fossilis, exposed to 4
mg/liter of malathion (1 3 of LC50) for 24, 48, 72, and 96 h showed significant changes in its …

The delicate and elaborate structure of the fish gill has long fascinated biologists as perhaps
the most exquisite example of an external respiratory organ. This chapter summarizes gill …

The mucous cells (MC) of traíra, Hoplias malabaricus, and jeju, Hoplerythrinus unitaeniatus,
two ecologically distinct erythrinid species, were analyzed in fish exposed to deionized (DW) …

Air-breathing fishes have evolved bimodal respiratory mechanisms for exploitation of water
(through gills and highly vascularized skin) as well as atmospheric air (through aerial …

Sub-lethal toxicity of lead nitrate solution (46.25 mg/L, 5% of 96h LC50 value) on the air-
breathing organ (suprabranchial chamber) of Channa striata was analysed for 60 days …

Topics covered in this volume include: transformation morphology on structures in the head
of cichlid fishes; the structure and function of fish liver; atretic follicles and corpora lutea in …

Acute and chronic exposure of heavy metals exerts detrimental effect at the cellular level
and is a rising global concern. The pollutants once introduced in the water bodies …

The purpose of this chapter is to provide background information on physical and biological
characteristics of the lower Richmond River where the field component of this study was …