| plasma concentrations of chloramphenicol in snakes. | plasma chloramphenicol concentrations after a subcutaneous injection were studied in 87 snakes of 16 different species. the biological half-life of chloramphenicol varied from 3.3 hours in the indigo snake (drymarchon corais couperi) to 22.1 hours in the midland water snake (nerodia sipedon). a single dosage of 50 mg of chloramphenicol/kg of body weight produced plasma concentrations greater than 5 micrograms/ml for nearly 72 hours in 2 species of water snakes (nerodia erythrogaster, nerodia sip ... | 1985 | 4083608 |
| the life history of hepatozoon rarefaciens (sambon and seligmann, 1907) from drymarchon corais (colubridae), and its experimental transfer to constrictor constrictor (boidae). | | 1967 | 4383539 |
| the primary structure of three hemoglobin chains from the indigo snake (drymarchon corais erebennus, serpentes): first evidence for alphad chains and two beta chain types in snakes. | the hemoglobin of the indigo snake (drymarchon corais erebennus, colubrinae) consists of two components, hba and hbd, in the ratio of 1:1. they differ in both their alpha and beta chains. the amino acid sequences of both a chains (alphaa and alphad) and one beta chain (betai) were determined. the presence of an alphad chain in a snake hemoglobin is described for the first time. a comparison of all snake beta chain sequences revealed the existence of two paralogous beta chain types in snakes as w ... | 2002 | 12553727 |
| development of snake-directed antipredator behavior by wild white-faced capuchin monkeys: i. snake-species discrimination. | young animals are known to direct alarm calls at a wider range of species than adults. our field study examined age-related differences in the snake-directed antipredator behavior of infant, juvenile, and adult white-faced capuchin monkeys (cebus capucinus) in terms of alarm calling, looking behavior, and aggressive behavior. in the first experiment, we exposed infant and juvenile white-faced capuchins to realistic-looking inflatable models of their two snake predators, the boa constrictior (boa ... | 2013 | 23229464 |
| seven new species of eimeria schneider, 1875 (apicomplexa: eimeriidae) from colubrid snakes of guatemala and a discussion of what to call ellipsoid tetrasporocystic, dizoic coccidia of reptiles. | during a survey of guatemalan herpetofauna in the summers of 1998-2000, 29 presumed new species of eimeria schneider, 1875 were found, seven of which have a distinct elongate-ellipsoidal shape (l/w ratio >or= 1.7) and are described herein. six of the seven new species are similar in oöcyst length, width and l/w ratio and sporocyst length, width and l/w ratio, lack a micropyle, oöcyst residuum, stieda body, sub-- and parastieda bodies, have a polar granule and sporocyst residuum, and their sporoc ... | 2006 | 16612656 |
| an autoradiographic study of the sites of protein synthesis in the epidermis of the indigo snake (drymarchon corais couperi). | | 1967 | 6076900 |
| cutaneous melanocyte system of the indigo snake drymarchon corais. | | 1966 | 6008102 |
| carbon dioxide from the unsevered vagus nerve of the snake. | 1. the vagus nerve of the gopher-snake, drymarchon corais couperi (holbrook), discharges carbon dioxide at an average rate of 0.00234 mgm. of gas per gram of nerve per minute. the extremes were 0.0032 mgm. and 0.0017 mgm. 2. these rates were maintained as well when the nerve was separated from its central and its peripheral connections as when these connections were intact showing that the resting metabolism of nerve is a local operation and is not immediately dependent upon distant connections. ... | 1929 | 19872470 |