Immunoreactive distribution of gonadotropin‐inhibitory hormone precursor, RFRP, in a temperate bat species ( Eptesicus fuscus )

2021 ◽  
Author(s):  
Mattina M. Alonge ◽  
Lucas J. S. Greville ◽  
Paul A. Faure ◽  
George E. Bentley
Keyword(s):  
Eptesicus Fuscus ◽  
Gonadotropin Inhibitory Hormone

Clutter Interference and the Integration Time of Echoes in the Echolocating Bat, Eptesicus fuscus

1988 ◽  
Author(s):  
James A. Simmons ◽  
Edward G. Freedman ◽  
Scott B. Stevenson ◽  
Lynda Chen ◽  
Timothy J. Wohlgemant
Keyword(s):  
Eptesicus Fuscus ◽  
Integration Time

scholarly journals Developmental changes in gonadotropin-inhibitory hormone in the Japanese quail (Coturnix japonica) hypothalamo-hypophysial system

2003 ◽  
Vol 178 (2) ◽  
pp. 311-318 ◽  
Author(s):  
T Ubuka ◽  
M Ueno ◽  
K Ukena ◽  
K Tsutsui
Keyword(s):  
Japanese Quail ◽  
Median Eminence ◽  
Anterior Pituitary ◽  
Coturnix Japonica ◽  
Developmental Changes ◽  
External Layer ◽  
Mature Peptide ◽  
Gonadotropin Release ◽  
Gonadotropin Inhibitory Hormone ◽  
Precursor Mrna

We previously isolated a novel dodecapeptide containing a C-terminal -Arg-Phe-NH(2) sequence, SIKPSAYLPLRF-NH(2) (RFamide peptide), from the Japanese quail (Coturnix japonica) brain. This novel quail peptide was shown to be located in neurons of the paraventricular nucleus (PVN) and their terminals in the median eminence (ME), and to decrease gonadotropin release from cultured anterior pituitary in adult birds. We therefore designated this peptide gonadotropin-inhibitory hormone (GnIH). Furthermore, a cDNA encoding the GnIH precursor polypeptide has been characterized. To understand the physiological roles of this peptide, in the present study we analyzed developmental changes in the expressions of GnIH precursor mRNA and the mature peptide GnIH during embryonic and posthatch ages in the quail diencephalon including the PVN and ME. GnIH precursor mRNA was expressed in the diencephalon on embryonic day 10 (E10) and showed a significant increase on E17, just before hatch. GnIH was also detected in the diencephalon on E10 and increased significantly around hatch. Subsequently, the diencephalic GnIH content decreased temporarily, and again increased progressively until adulthood. GnIH-like immunoreactive (GnIH-ir) neurons were localized in the PVN on E10, but GnIH-ir fibers did not extend to the ME. However, GnIH-ir neurons increased in the PVN on E17, just before hatch, and GnIH-ir fibers extended to the external layer of the ME, as in adulthood. These results suggest that GnIH begins its function around hatch and acts as a hypothalamic factor to regulate gonadotropin release in the bird.

The influence of roost closure on the roosting and foraging behaviour of Eptesicus fuscus (Chiroptera: Vespertilionidae)

1986 ◽  
Vol 64 (5) ◽  
pp. 1128-1133 ◽  
Author(s):  
R. Mark Brigham ◽  
M. Brock Fenton
Keyword(s):  
Reproductive Success ◽  
Direct Observation ◽  
Foraging Behaviour ◽  
Eptesicus Fuscus ◽  
Maximum Distance ◽  
Radio Tracking ◽  
Site Specific ◽  
Big Brown Bats ◽  
Specific Factors ◽  
Foraging Flight

We used radio tracking and direct observation to determine the effect of roost closure on the roosting and foraging behaviour of big brown bats (Eptesicus fuscus) in maternity colonies near Ottawa. Individuals were site loyal, but after eviction they moved short distances to new roosts where they tended to produce fewer offspring. The time spent on the first foraging flight, the maximum distance travelled, and the use of feeding areas did not change with exclusion. The results suggest that bats roost to take advantage of site-specific factors that may increase reproductive success.

scholarly journals Sampling Blood from Big Brown Bats (Eptesicus fuscus) in the Field with and without Anesthesia: Impacts on Survival

2006 ◽  
Vol 42 (4) ◽  
pp. 849-852 ◽  
Author(s):  
Laura E. Ellison ◽  
Thomas J. O'Shea ◽  
Jeffrey Wimsatt ◽  
Roger D. Pearce ◽  
Daniel J. Neubaum ◽  
...  
Keyword(s):  
Eptesicus Fuscus ◽  
Big Brown Bats

Genetic relationships between roost-mates in a fission–fusion society of tree-roosting big brown bats (Eptesicus fuscus)

2007 ◽  
Vol 62 (7) ◽  
pp. 1043-1051 ◽  
Author(s):  
Jackie D. Metheny ◽  
Matina C. Kalcounis-Rueppell ◽  
Craig K. R. Willis ◽  
Kristen A. Kolar ◽  
R. Mark Brigham
Keyword(s):  
Genetic Relationships ◽  
Eptesicus Fuscus ◽  
Big Brown Bats
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