Results 211 to 220 of about 58,693 (334)

Effects of Photoperiodism and Other Factors on the Improvement of Pigeonpea Varieties

, 1964
Arturo Riollano
openalex   +2 more sources

Secretion of LH in rams exposed to two different photoperiods [PDF]

, 1976
G. A. Lincoln
openalex   +1 more source

Behavior of Rio Sao Francisco Piranhas in Response to Changes in Space and Density

Zoo Biology, EarlyView.
ABSTRACT Previous observations of Rio Sao Francisco piranhas (Pygocentrus piraya) at Cleveland Metroparks Zoo revealed frequent aggressive interactions, which were associated with the injury and death of some individuals. Fishes are known to increase aggressive behavior when available space is limited.
Ronald G. Oldfield, Josie E. Thal, Nick J. Zarlinga, Kristen E. Lukas, Jason D. Wark   +4 more
wiley   +1 more source

Integration of photoperiodic and temperature cues by the circadian clock to regulate insect seasonal adaptations. [PDF]

J Comp Physiol A Neuroethol Sens Neural Behav Physiol
Hidalgo S, Chiu JC.
europepmc   +1 more source

Coral reef fish visual adaptations to a changing world

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Coral reef ecosystems show fluctuations in their prevailing light environment in response to both regular (e.g. between seasons) and more prevalent stochastic events (e.g. human‐induced sediment runoff).
Abigail Shaughnessy, Fabio Cortesi
wiley   +1 more source

Genomics of hybrid parallel origin in Aquilegia ecalcarata. [PDF]

BMC Ecol Evol
Geng FD, Liu MQ, Zhang XD, Wang LZ, Lei MF.   +4 more
europepmc   +1 more source

Photoperiodism and Age as Factors Affecting the Protein Requirements of Laying Pullets

, 1968
D.J. Bray
openalex   +1 more source

Vision at high latitudes: High sensitivity without specific boreal adaptations in photoreception in reindeer (Rangifer tarandus L.)

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The light climate at high latitudes, in particular the extended twilight of winter and the reduced diel variation in light level in midsummer and midwinter, potentially constrains visual function and the synchronisation of temporal organisation in polar species. In this
Nicholas J. C. Tyler, Robert A. E. Fosbury, David Hazlerigg, Christopher Hogg   +3 more
wiley   +1 more source

Effect of Ambient Lighting on Intraocular Pressure Rhythms in Rats. [PDF]

Invest Ophthalmol Vis Sci
Nicou CM, Passaglia CL.
europepmc   +1 more source

EFFECT OF PROLONGED DAILY PHOTOPERIODS ON THE HYPOTHALAMIC NEUROSECRETORY SYSTEM OF THE TREE SPARROW (PASSER MONTANUS SATURATUS)

, 1966
Tokuzo Matsui
openalex   +2 more sources