Zobrazeno 1 - 10
of 15
pro vyhledávání: '"David W. Ehrenfeld"'
Autor:
David W. Ehrenfeld
Attacks nothing less than the currently prevailing world philosophy--humanism, which the author feels is exceedingly dangerous in its hidden assumptions.
Autor:
David W. Ehrenfeld
Publikováno v:
American Scientist. 93:469
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15e339fc02a0c32428f48709ea0f5584
https://doi.org/10.1511/2005.55.469
https://doi.org/10.1511/2005.55.469
Publikováno v:
Physiological Zoology. 31:244-247
dosage-response studies indicate the need for further investigation before it can be concluded that gonadal hormones do not affect learning. It is possible that, at certain levels, testosterone propionate may affect the activity of an organism or may
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de5eccfcf1d15f3a0e5e32af285315ee
https://doi.org/10.1086/physzool.31.3.30157847
https://doi.org/10.1086/physzool.31.3.30157847
Publikováno v:
The Biological Bulletin. 143:184-195
1. The ability of the green turtle (Chelonia mydas) to detect various chemical substances dissolved in water has been investigated using operant conditioning techniques. The turtles pressed underwater keys to obtain food reinforcement in the presence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ad71f56be7c7a36805c20596605b50e
https://doi.org/10.2307/1540338
https://doi.org/10.2307/1540338
Autor:
David W. Ehrenfeld
Publikováno v:
The Quarterly Review of Biology. 46:270-273
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::153986967c3c2f9878e96166e1e51d9e
https://doi.org/10.1086/406899
https://doi.org/10.1086/406899
Autor:
Archie Carr, David W. Ehrenfeld
Publikováno v:
Animal Behaviour. 15:25-36
Summary Two tests of sea-finding orientation were used to determine the nature of the visual cues that guide green turtles to the sea after hatching or nesting. The orientation performance, in day-light, during 143 trials with adult female turtles wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d6e6c77c54bc44be0a3785369e74079
https://doi.org/10.1016/s0003-3472(67)80007-1
https://doi.org/10.1016/s0003-3472(67)80007-1
Publikováno v:
Journal of Theoretical Biology. 22:163-179
Green turtles, Chelonia mydas , make lengthy, regular migrations from Brazil to their nesting grounds on Ascension Island, 1400 miles away. The navigational systems used by Chelonia are unknown; but recent measurements of visual acuity in green turtl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e84aa6d5a54e9f135ca1aa7dc9681ce2
https://doi.org/10.1016/0022-5193(69)90085-x
https://doi.org/10.1016/0022-5193(69)90085-x
Autor:
David W. Ehrenfeld
Publikováno v:
Animal Behaviour. 16:281-287
The mechanism of the sea-finding orientation of green turtles was studied on their Costa Rican nesting beach. Unilateral blindfolding of mature turtles caused continuous turning towards the side of the uncovered eye. Turtles with one eye covered by a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47ef21c973b780f916e946b6b3d231d2
https://doi.org/10.1016/0003-3472(68)90010-9
https://doi.org/10.1016/0003-3472(68)90010-9
Autor:
Joan G. Ehrenfeld, David W. Ehrenfeld
Publikováno v:
Environmental Ethics. 7:93-95
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ca7c667c37f511a3eb4c23c15759857
https://doi.org/10.5840/enviroethics19857112
https://doi.org/10.5840/enviroethics19857112
Autor:
David W. Ehrenfeld
Publikováno v:
The Quarterly Review of Biology. 57:304-305
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba0654453b7359e89e2aacc6bb37e947
https://doi.org/10.1086/412811
https://doi.org/10.1086/412811