Showing papers in "Aquaculture in 1973"

TL;DR: Information is presented about parasites and commensals of penaeid shrimps, allowing those who rear shrimp and those who are interested in associated organisms of shrimp to have a better knowledge of the organisms that are or may be associated with brown, white, and pinkShrimps.

TL;DR: Results showed that diets were capable of producing a 106–329% increase in weight in juvenile Penaeid shrimp over a 25-day period, and growth appeared to increase with amount of protein in the diet.

TL;DR: The diet of young Mugilidae changes when the diatoms become the primary source of food, and a distinct diet change when the three species of mullets reach about 50 mm length is observed.

TL;DR: Variations previously observed in the diet of young Mugilidae (Mugil auratus, Mugil capito and Mugil salinens) caught along the Marseilles coast, have been closely studied during their growth from April 1971 to January 1973.

TL;DR: Body proportions, meristic characters and chemical composition of laboratory reared and wild O-group herring of the Clyde (Scotland) spring spawning stock were studied and a high percentage of reared herring had abnormalities in the head region.

TL;DR: Uptake, at least in certain forms (bivalves, pteropods), bears a relationship with the environmental DOM concentration, and the need to consider it as a significant factor in evaluating energy flow in the ecosystem are emphasized.

TL;DR: Larval Siganus rivulatus eggs were successfully hatched from eggs on four occasions and the last survivors died after 8–9 days of free feeding.

TL;DR: Hatching time was extremely variable, ranging from 2 to 5 days after fertilization, when the eggs were hatched in petri-dishes at a temperature of 27±1°C, but it was fairly constant at around 3 daysAfter fertilization when the larvae did not survive for more than a few days.

TL;DR: Changes in haematocrit values in anaerobically and aerobically treated blood samples of rainbow trout have been studied in vitro, finding an increase may result from cellular swelling, caused by an increase in the CO 2 tension of the blood due to cellular respiration.

TL;DR: The egg diameter of salmon from 16 different localities in Norway, including 2 ‘grilse’ rivers, was observed and there was a significant difference between rivers, and a significant effect of body length on egg diameter.

TL;DR: It appears that the decrease in seawater temperature in late summer, the long period of favourable temperatures in autumn, and the development of a bacterial-algal layer on the substrate material are responsible for spat settlement.

TL;DR: In an experiment in which fish were held in static water, ammonia accumulated only in those tanks which did not contain a population of the unicellular alga Dunaliella tertiolecta as mentioned in this paper.

TL;DR: It was found that the maximum salinity tolerance of T. zillii, on direct transfer, is between 60–70% sea water, but through gradual adaptation the fish can withstand up to 100%Sea water.

TL;DR: The use of fungistatics in pike culture should be prophylactic rather than therapeutic, and the in vitro fungistatic properties of chloramine T, formalin and malachite green oxalate appeared to give the best results.

TL;DR: In this paper, concentrations of copper, zinc, cadmium and lead have been measured in age groups 0 and 1 sprat, Sprattus sprattus (L.) and in 0-group herring, Clupea harengus L.

TL;DR: Data on the growth rates of hatchery-reared and wild fish indicated that under artificial conditions a minimum market size of 30 cm could be attained in a little over one year from hatching.

TL;DR: Of a number of antibiotics tested, the most effective in decreasing bacteria in sea water and enhancing hatching success and larval survival were the polymyxins, penicillins, and especially erythromycin.

TL;DR: Young phytophagous fish as an addition to the usual stock of common carp in ponds reduce the effects of grazing of fish upon zooplankton, expressed by a greater contribution of small species in the total number of crustaceans.

TL;DR: A brood stock of 3-year-old grey mullet was maintained in two small rubber-lined outdoor ponds with circulating sea water and males and females matured the following year and those not sacrificed for experimental data were induced to spawn by hormone injections.

TL;DR: Clarias breeders collected and kept in conditioning tanks for a few weeks before they were injected with hormones had better inducing effects than the gonadotropin preparations, and Breeders injected pituitary homogenates responded well by 50% to 100% of each batch while those treated with chorionic gonadotropic responded by only 17% or less.

TL;DR: Life history study on Lernaea cyprinacea showed that the first copepodid stage appeared 3–4 days after hatching and there are six copepid stages similar to those reported in other studies on this species.

TL;DR: It is concluded that dumping of red mud would endanger the stocks of bottom fish and fauna and should therefore take place in regions without any fishing activities with depth greater than 3000 m.

TL;DR: Aquaculture, as an enterprise, is a relatively recent matter of concern among American entrepreneurs, and thus aquaculture has attracted bold and venturous investors even though in many recent cases the requisite knowledge and skills were lacking as discussed by the authors.

TL;DR: A semi-automated apparatus is described, capable of producing about 250 million nauplii daily at a maximum loading of 1.0 g/liter, which resulted in optimum production within a 36-h incubation period.

TL;DR: From a protein nutrition point of view, it is cheaper to grow some aquatic rather than land animals in Taiwan because the rate of return on investment is higher in aquaculture than in ocean fishing and pig farming.

TL;DR: No changes in pigmentation and sexual maturation of rainbow trout kept in continuous artificial illumination and continuous complete darkness were observed.

TL;DR: Initial studies on Murray cod (Maccullochella peeli, Family Serranidae) are reported, with initial results indicating that eggs are demersal-adhesive and stickiness was temporarily inhibited by a solution of NaCl.