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Mullet fisheries of Taiwan catch pattern
113
MULLET
FISHERIES
WEN-YOUNG Laboratory
OF TAIWAN
CATCH PATTERN
TSENG
of Fishery Biology,
Taiwan Fishery Research
Institute,
Keelung
(Taiwan)
ABSTRACT Grey mullets (Mugil cephalus Linnaeus) are distributed throughout the estuaries along the southeast coast of Mainland China and migrate every year to southern Taiwan for spawning as a result of the cold China Coastal current. The prosperous fishing period ranges from December to January, with the average catch being about 600 000-800 000 individuals per year. The most adaptive temperature ranges from 20 to 23°C. The fluctuation of fish catch varies with the temperature of the surface water. An assumed migration route baaed on observations of catch pattern is given in this report.
MARINE
FISH CULTURE
IN FRANCE:
RECENT DEVELOPMENTS
MICHEL GIRIN Centre Ockanotogique
de Bretagne,
Brest Cedex
(France)
ABSTRACT The availability for culture of four marine fish species of high commercial value, sea Bass (Dicentrarchus labrax), Gilthead Bream (Chrysophrys aurata), Turbot (SeophthaZmus maximus), and Sole (Solea solea), has been investigated in France during the last 4 years. The spawning of the sea Bass was obtained naturally and induced by hormonal injections. Larval rearing produced several tens of thousands of fingerlings, with an average survival of 5%. An artificial diet for fiih to marketable size was developed and tested in the laboratory. The spawning of the Gilthead Bream was induced by hormonal injections. Larval rearing produced 800 fingerlings with a poor survival rate. An artificial diet for these was developed and tested in the laboratory. The spawning of the Turbot was obtained naturally. Larval rearing produced 300 fingerlings with an average survival of 0.3%. An artificial diet is being tested in the laboratory. The spawning of the Sole was obtained naturally. Larval rearing produced several thousands of metamorphosed fishes, with an average survival exceeding 50%. Research is now concentrated on developing an artificial diet for fingerlings.
MULLET
FISHERIES
WEN-YOUNG Laboratory
OF TAIWAN
CATCH PATTERN
TSENG
of Fishery Biology,
Taiwan Fishery Research
Institute,
Keelung
(Taiwan)
ABSTRACT Grey mullets (Mugil cephalus Linnaeus) are distributed throughout the estuaries along the southeast coast of Mainland China and migrate every year to southern Taiwan for spawning as a result of the cold China Coastal current. The prosperous fishing period ranges from December to January, with the average catch being about 600 000-800 000 individuals per year. The most adaptive temperature ranges from 20 to 23°C. The fluctuation of fish catch varies with the temperature of the surface water. An assumed migration route baaed on observations of catch pattern is given in this report.
MARINE
FISH CULTURE
IN FRANCE:
RECENT DEVELOPMENTS
MICHEL GIRIN Centre Ockanotogique
de Bretagne,
Brest Cedex
(France)
ABSTRACT The availability for culture of four marine fish species of high commercial value, sea Bass (Dicentrarchus labrax), Gilthead Bream (Chrysophrys aurata), Turbot (SeophthaZmus maximus), and Sole (Solea solea), has been investigated in France during the last 4 years. The spawning of the sea Bass was obtained naturally and induced by hormonal injections. Larval rearing produced several tens of thousands of fingerlings, with an average survival of 5%. An artificial diet for fiih to marketable size was developed and tested in the laboratory. The spawning of the Gilthead Bream was induced by hormonal injections. Larval rearing produced 800 fingerlings with a poor survival rate. An artificial diet for these was developed and tested in the laboratory. The spawning of the Turbot was obtained naturally. Larval rearing produced 300 fingerlings with an average survival of 0.3%. An artificial diet is being tested in the laboratory. The spawning of the Sole was obtained naturally. Larval rearing produced several thousands of metamorphosed fishes, with an average survival exceeding 50%. Research is now concentrated on developing an artificial diet for fingerlings.