+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Electroretinographic responses of the great horned owl bubo virginianus

, : Electroretinographic responses of the great horned owl bubo virginianus. Journal of Raptor Research 21(4): 147-152

Electroretinograms were recorded from four Great Horned Owls (Bubo virginianus). Two procedures, dark adaptation and flicker stimuli, were used to assess the contributions of rode and cone systems to electroretinograms. Recordings obtained after dark adaptation demonstrated scotopic (rod-generated) components. B-waves were broad and rounded and had a fairly long latency. When high intensity single-flash stimuli were used, b-waves had shorter latencies, and prominent a-waves were present, indicative of the addition of photopic (cone-generated) activity. Photopic activity was more clearly demonstrated with flicker ERGs. Scotopic fusion frequency was approximately 16 Hz. Photopic fusion frequencies were in the range of 35-45 Hz. The Great Horned Owl retina functions optimally during low luminance levels at night. However, the presence of a functional photopic system allows this owl to also function in brighter luminances of day.

(PDF 0-2 workdays service)

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 005349960

PDF Full Text: Submit

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Anonymous, 2000: Equipped for the purpose. Various items classed as general laboratory equipment are reviewed.

Soc Fr Hematol, 1968: Meeting of the societe francaise d hematologie french society for hematology symposium on lymphocyte circulation in man paris france february 19 1968. Nouvelle Revue Francaise d'Hematologie 8(5): 495-758

Chrzanowski, A. R., 1984: Effect of irrigation and mineral fertilizers on the production of Scots pine seedlings. Trials were made in 1977-79 in 4 different regions of Poland with irrigation at 5 intensities (zero, limited, average, intense and very intense) with or without added mineral fertilizer at 0.5-2.5 times the recommended norms for nurseries. Product...

Sherys A.Y.; Gurov A.N.; Tolstoguzov V.B., 1989: Water insoluble triple complexes bovine serum albumin bivalent metal cation alginate. Formation of water-insoluble complexes between bovine serum albumin (BSA) and sodium alginate in the presence of bivalent metal cations was studied. Complexing was observed to take place close to the BSA isoelectric point and above only for cation...

Stiller, Michael; Urban, Maik; Golder, Werner; Tiziani, Valdenize; Reichenberger, Ernst; Frege, Joerg; Opitz, Charlotte; Peters, Hartmut, 2000: Craniosynostosis in cherubism. Cherubism is a rare autosomal dominant fibro-osseous disorder that affects almost exclusively maxilla and mandible. Extracranial skeletal involvement is rare. We report on three affected males in three generations. The youngest affected relative w...

Giri, N.; Taylor, N. L.; Collins, G. B., 1981: Chromosome numbers in some Trifolium species with a karyotype for T. physodes. Chromosome numbers of eight species were determined from root tips and PMCs. T. megalanthum and T. badium had 2n = 32 and 2n = 14 chromosomes, respectively. T. amabile, T. philisticum and T. virginicum all had 2n = 16. T. aureum and T. strepens ha...

Jin-Hu Wu; A. Ross Ferguson; Brian G. Murray, 2011: Manipulation of ploidy for kiwifruit breeding in vitro chromosome doubling in diploid Actinidia chinensis Planch. Tetraploid plants were induced by colchicine treatment of in vitro leaf petiole segment cultures of five diploid <i>Actinidia chinensis</i> Planch. genotypes<i>,</i> including the commercially important, yellow-fleshed cult...

Hogenkamp H.P.C.; Tkachuck R.D.; Fuentes R.; Matwiyoff N.A., 1975: Carbon 13 partially relaxed fourier transform nmr spectroscopy of organo corrinoids selectively enriched with carbon 13. Federation Proceedings 34(3): 690

Deeming, Jc, 1979: A new giant species of Milichia Meigen from Central Africa (Diptera, Milichiidae). Bulletin 84(3-4): 97-99

Van Dijk Saunder A.; Amotutz Roy; Pearcy Richard; Jones Michael, 1990: Foothills VSP success; a case study. In areas of complex geology and poor seismic data, a VSP can be used to help improve confidence in interpretation and better understanding of a prospect area. The area which will be discussed has poor seismic data quality over the main target prim...