. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. FOOD AND FEEDING. paired and one central single eye. It has two pairs of threadlike an- tennae. Under the shell there are 60 pairs of gilled legs, of which the first pairs are developed into anten- nse-like feelers. It swims on the back, and steadily moves through the water by rapid undulating strokes of the legs. The periodic appearance of this Crustacean may be due to the fact that the eggs must be subjected to a period of
. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. FOOD AND FEEDING. paired and one central single eye. It has two pairs of threadlike an- tennae. Under the shell there are 60 pairs of gilled legs, of which the first pairs are developed into anten- nse-like feelers. It swims on the back, and steadily moves through the water by rapid undulating strokes of the legs. The periodic appearance of this Crustacean may be due to the fact that the eggs must be subjected to a period of incubation in the dry earth. The food consists of water animalculse and decaying vegetation. It is the larv£e and young of these Branchiopods which constitue the food of the mature goldfish, the adult being of too large size to be readily taken. It is principally the Crustaceans of the follow- ^ ' Gte^h/^'lnhrgld"""''^' ing sub-order Cladocera which constitute their live food. Sub-order Cladocera. Compressed body small, indistinctly seg- mented, enclosed in a bivalve carapace, four or six swimming feet, and the posterior antennas developed as longer swimming feet. The most general forms are Daphnia, Polyphemus arid Leptodora. Daphnella, Sida and Ciriodaphnia also belong to this sub-order. Daphnia. Fig. 66. Four or five species of Daphnia, known to the goldfish breeder by their light green,'dark green, red and reddish colors, abound at different seasons in almost every still or stagnant water. Their size is from .75 to millimeters. The segmentation of the body is imperfect, the Crustacean being covered by a folded carapace. The head is distinct and the abdomen is turned downward and is in constant movement. The long antennae are moved at longer or shorter intervals, making the progress a series of rapid starts and stops. Between the abdomen and the carapace of the female is a large brood pouch in which the eggs are stored and hatched and the larvae only make
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectaquariu, bookyear1908
