. Cold-blooded vertebrates: part I. Fishes. Fishes; Amphibians; Reptiles. SEX AND REPRODUCTION The nest building of the American bowfin [Amia calva)^ reveals extensive care on the part of the male parent, which Jacob Reighard describes as follows: In water of 30 to 60 centimetres depth with abundant growing plants, males select small areas on the bottom which are relatively free of growing plants and are often concealed, and from these, by movements. Fig. 42. Common sunfish, Eiipomotis gibbostiSy on nest of the body and fins and perhaps by biting, they remove the few plants and the bottom ooze
. Cold-blooded vertebrates: part I. Fishes. Fishes; Amphibians; Reptiles. SEX AND REPRODUCTION The nest building of the American bowfin [Amia calva)^ reveals extensive care on the part of the male parent, which Jacob Reighard describes as follows: In water of 30 to 60 centimetres depth with abundant growing plants, males select small areas on the bottom which are relatively free of growing plants and are often concealed, and from these, by movements. Fig. 42. Common sunfish, Eiipomotis gibbostiSy on nest of the body and fins and perhaps by biting, they remove the few plants and the bottom ooze so as to leave exposed the fibrous roots of the plants or the sand, gravel, or other subjacent material. The nests are thus excavated in the absence of the females and chiefly at night. Their proximity to one another varies with the number of males as related to the area of available spawning ground and with the character of the ground. These nests, while still empty, are guarded by the males for usually twenty-four to thirty-six hours, but often for a much longer time. They are then usually approached by the females and spawning takes place. It the female does not appear, the nest is abandoned. The spawning is intermittent, and the characteristic spawning move- [ 109]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hildebrand, Samuel F. (Samuel Frederick), 1883-1949; Gilmore, Charles Whitney, 1874-; Cochran, Doris M. (Doris Mable), 1898-1968. [New York, Smithsonian institution series, inc. ]
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Keywords: ., bookcentury1900, booksubj, booksubjectfishes, booksubjectreptiles
