Browsing by Author "Clark, Eugenie."

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Open Access
A contribution to the visceral anatomy, development, and relationships of the Plectognathi. Bulletin of the AMNH ; v. 88, article 5
(New York : [American Museum of Natural History], 1947) Breder, Charles M. (Charles Marcus), 1897-; Clark, Eugenie.
"One. The gross morphology of digestive tracts of all the suborders of the Plectognathi are described from representatives, with especial reference to the development of the mechanism of inflation. 2. The structure and operation of the inflation mechanism are discussed in detail. 3. The capacity for inflation of Spheroides maculatus is shown to vary directly with the length of the fish and to be proportional to the volume of a sphere, the diameter of which is 61 per cent of the standard length. 4. The comparative ontogeny of the various groups is discussed. 5. The ontogeny of Acanthostracion quadricornis is described and figured and shown to resemble that of the Gymnodontes more closely than that of the Sclerodermi. 6. The phylogeny of the Plectognathi is discussed in its broader aspects"--P. 317.
Open Access
Mating behavior patterns in two sympatric species of xiphophorin fishes : their inheritance and significance in sexual isolation. Bulletin of the AMNH ; v. 103, article 2
(New York : [American Museum of Natural History], 1954) Clark, Eugenie.; Aronson, Lester R. (Lester Ralph), 1911-; Gordon, Myron, 1899-1959.
Open Access
Notes on some Hawaiian plectognath fishes, including a key to the species. American Museum novitates ; no. 1397
(New York : American Museum of Natural History, 1949) Clark, Eugenie.
Open Access
The role of the pelvic fins in the copulatory act of certain poeciliid fishes. American Museum novitates ; no. 1509
(New York : American Museum of Natural History, 1951) Clark, Eugenie.; Kamrin, Robert P.
"The role of the male pelvic fins in the copulatory act of Lebistes reticulatus, Platypoecilus maculatus, and Xiphophorus hellerii has been studied experimentally. Males with one pelvic fin removed appear to be able to transfer sperm to a female as readily as intact control fish. Males with both fins removed are strongly handicapped in this respect, although they may eventually adjust themselves to this condition and transfer sperm without the aid of pelvic fins. The pelvic fins of mature males appear to have three possible functions during copulation: (1) as a supporting mechanism for the gonopodium when the latter is brought forward and to the side during the swinging, thrusting, and copulatory behaviors in courtship, (2) as a mechanism to aid the gonopodium in forming an enclosure for the passage of spermatophores, and (3) as a supplementary part of the ejaculatory mechanism for the release of spermatophores during copulation"--P. 13.