Population dynamics of Lernaea cyprinacea (Crustacea: Copepoda) on four cyprinid species.

A total of 217 Barbus graellsii, 54 Barbus haasi, 417 Cyprinus carpio and 85 Leuciscus cephalus captured at 9 sampling stations in the central basin of the Llobregat River (NE Spain) were studied for Lernaea cyprinacea parasitism. Prevalence (B. graellsii 39.2, B. haasi 31.5, C. carpio 8.4, L. cephalus 48.2), intensity of infection (B. graellsii range 1 to 39, mean 4.6; B. haasi range 1 to 7, mean 2.6; C. carpio range 1 to 16, mean 3.1; L. cephalus range 1 to 8, mean 2.4), and abundance (B. graellsii 1.80; B. haasi 0.83; C. carpio 0.26; L. cephalus 1.15) varied with the fish species studied. Correlations between abundance and host size were positive and significant for B. graellsii and L. cephalus. Correlation was positive but non-significant for B. haasi. Correlation between intensity and fish size was positive but not significant for B. graellsii, C. carpio, and L. cephalus. This is the first record of L. cyprinacea infecting B. graellsii and B. haasi.

Environmental fungus flora in quail-breeding farms.

An investigation was made of the environmental fungus flora in a quail-bleeding farm during a period of 5 months (May-September 1978). A total of 5826 colonies were obtained. The genera encountered most frequently were Aspergillus (28.96%), Penicillium (21.21%), Scopulariopsis (16.84%), and Aureobasidium (13.90%). Of the Aspergillus species, A. fumigatus was isolated the most often (12.61%) of the total). The different fungal species were variously distributed according to the production zones and age of the animals in which they were found.