Biology and phenology of Amblygaster sirm (Clupeidae) in New Caledonia, a sardine of the coral environment

The biology of the sardine, #Amblygaster sirm$, is studied from fish caught in the lagoons around New Caledonia. About 500 fishing hauls were carried out between 1980 and 1983. This sardine is a fast-growing, medium sized fish (Lmax:24 cm) with a short lifespan. Reproduction takes place from October to December. First maturity is attained when fish reach 1 year of age and at this time their size is about 16-17 cm. Mortality is high and most fish die before the age of 2 years. This phenology compared with other seasonal spawners indicates a tendency towards semelparity. (Résumé d'auteur

Life history of the silverside Atherinomorus lacunosus (Atherinidae) in New Caledonia

The abundance, the seasonal variation and the life history of the silverside, #Atherinomorus lacunosus, are studied from fish caught in the lagoons around New Caledonia. About 270 nights of fishing were carried out between 1980 and 1983. The silverside is present in most of the fishing hauls but seldom in large quantities. Fish reproduce from September to December at 1 year of age. At this time their size is about 10 cm. Mortality is high and a few individuals can survive a second year and reach 13 cm. Results from other studies indicate that in a less seasonally contrasted environment than the lagoons of New Caledonia, #A. lacunosus has several spawning periods during the year. This species is thus able to adjust its phenology to the environmental conditions. (Résumé d'auteur

Identification et distribution saisonnière de larves de Carangidés au large du Sénégal et de la Gambie

... Une étude a été entreprise sur les larves de Carangidés. Les renseignements trouvés dans la bibliographie, et les observations morphologiques et biométriques permettent l'identification des larves de #Trachurus spp., #Caranx rhoncus, #Chloroscombrus chrysurus, #Vomer setapinnis, #Lichia glauca, #Scyris alexandrinus, #Pomatomus saltatrix et #Caranx sp. (aff. #Carangus). L'étude de la distribution saisonnière a montré que sur les côtes du Sénégal, les #Trachurus se reproduisent de décembre à mai dans les eaux froides du large, #Caranx rhonchus et #Pomatomus saltatrix de mai à novembre dans les zones frontales, et les autres espèces de juin à novembre dans les eaux chaudes du plateau continental. Les données de la pêcherie montrent que, pour #Trachurus et #Chloroscombrus, les concentrations d'adultes coïncident avec la ponte. #Trachurus spp., #C. rhonchus et #C. chrysurus$ constituent les 9/10 des larves de Carangidés récoltées. (D'après résumé d'auteur