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Summary Since 1973, the treatment of sexually mature fish with brain hormones (i. e. neurohormones) in order to induce spawning activity has gradually been replacing the hypophysation, although the latter is still widely used. Some brain‐hormone analogues have a hightened spawning‐inducing...
Summary The Intestines of the Mugilidae (Pisces Teleostei) at different growth stages. II‐Ultrastructural and cytophysiological aspects The ultrastructures and functions of the columnar cells of the intestinal epithelia are characterized, from the larva to the adult stage: major transformations...
Summary In order to standardize fish egg incubation techniques for bioassay application, fertilization procedures need to be included into the protocols. Nothing is known about the necessary sperm concentrations required to achieve optimal fertilization rates. The tests described here for the...
Summary The movements of two young male soles introduced into net enclosure located in a saltmarsh were recorded over a 3‐day and 5‐day period by means of an acoustic emission location device. A description of the tracking system is provided. The results illustrate the performance of the device...
Summary Therapeutic control of crustacean ectoparasite Ergasilus ceylonensis on gills of Asian cichlid Etroplus suratensis inhabiting Negombo estuary and its tributaries on the west coast of Sri Lanka was investigated using formalin, gammexane, potassium permanganate, 3,4 Dichloropropyoanilyde...
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