An improved method for studying the condition of fish, with an example using Pacific sardine Sardinops sagax (Jenyns),Ovarian development, spawning frequency and batch fecundity in Encrasicholina heteroloba (Ruppell, 1858),Otolith microstructure and daily age of Anguilla japonica, Temminck & Schlegel elvers from the estuaries of Taiwan with reference to unit stock and larval migration,Reproductive biology and early life history of the marine teleost Platycephalus speculator Klunzinger (Platycephalidae) in a temperate Australian estuary,Prolactin cell activity and ion regulation in tilapia, Oreochromis mossambicus (Peters): effects of a low magnesium diet,The effect of somatostatins (SRIF‐14, 25 and 28), galanin and anti‐SRIF on plasma growth hormone levels in Coho salmon (Oncorhynchus kisutch, Walbaum),The relationship between specific dynamic action and growth in grass carp, Ctenophavyngodon idella (Val.),Movements of ultrasonically tagged brown trout (Sulmo trutta L.) in Lake Constance,Localization of chitinolytic enzymes in blood of turbot, Scophthalmus maximus, and their possible roles in defence,Age and growth of an Iberian cyprinodont, Aphanius iberus (Cuv. & Val.), in its most northerly population,Spawning behaviour and diel periodicity of egg production in captive Atlantic mackerel, Scomber scombrus ,Protogynous hermaphroditism in the half‐banded sea perch, Hypoplectrodes maccullochi (Serranidae),A simplified protocol for routine total DNA isolation from salmonid fishes,Cones in the retina of the catfish, Clarias batrachus,Melano‐macrophage centres in whitemouth croaker, Micropogonius furnieri, as biological indicators of environmental changes,Differences in electrophoretic patterns of lactate dehydrogenases from the gills, hearts and muscles of three mudskippers,Sexual status of Paralabrax humeralis (Serranidae) and infection by Philometra sp. (Nematoda: Dracunculoidea),Growth and survival of carp (Cyprinus carpio L.) larvae in alkaline water