Behaviour and reproductive performance of Nigerian native chickens subjected to different mating ratios for a short term

2020 ◽  
Vol 55 (5) ◽  
pp. 567-573
Author(s):  
Oluwaseun Serah Iyasere ◽  
David Oluwatowo Adeuyi ◽  
Rasheed Adebayo Alade ◽  
Samuel Olutunde Durosaro ◽  
Mathew Wheto ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Short Term ◽  
Native Chickens

A quantitative assessment of the reproductive biology of Cyclonaias tuberculata (Bivalvia: Unionidae)

1995 ◽  
Vol 73 (1) ◽  
pp. 83-88 ◽  
Author(s):  
Thomas M. Haggerty ◽  
Jeffrey T. Garner ◽  
George H. Patterson ◽  
Lannis C. Jones Jr.
Keyword(s):  
Sex Ratio ◽  
Reproductive Biology ◽  
Reproductive Performance ◽  
Quantitative Assessment ◽  
Late Summer ◽  
Early Spring ◽  
Short Term ◽  
Tennessee River ◽  
Early Fall

Two hundred and thirty-three purple wartyback unionids (Cyclonaias tuberculata) were collected approximately monthly over a 31-month period from Kentucky Reservoir (Tennessee river mile 201.3), Tennessee, between August 1988 and February 1991. An equal sex ratio and only one case of hermaphroditism were discovered. Histological examinations showed that spermatogenesis and oogenesis occurred throughout the year except during late summer and early fall. "Typical" spermatogenesis was most evident between May and July. Spawning occurred between early spring (March–April) and late summer (August). Brooding variation among females was shown by the presence of embryos in the suprabranchial chambers and gills between early April and late August. Brooding was short term, as indicated by mature larvae being found in the outer demibranchs between early July and late August. Full demibranchs were never found, possibly indicating that the study took place during years of poor reproductive performance.

scholarly journals Improve Reproductive Performance in Your Cow Herd Using Calf Removal

EDIS ◽  
2006 ◽  
Vol 2006 (17) ◽  
Author(s):  
Gary R. Hansen
Keyword(s):  
Reproductive Performance ◽  
Early Weaning ◽  
Short Term ◽  
Once Daily ◽  
Fact Sheet ◽  
Calf Removal ◽  
Animal Sciences

AN166, a 5-page fact sheet by Gary R. Hansen, discusses three methods of calf-removal and when to use each: short-term calf removal, once-daily suckling, and early weaning. Includes references and tables. Published by the UF Department of Animal Sciences, September 2006.

Reproductive performance of postpartum beef cows after short-term calf separation and dietary energy and protein supplementation

1986 ◽  
Vol 26 (4) ◽  
pp. 433-443 ◽  
Author(s):  
R.P. Wettemann ◽  
G.M. Hill ◽  
M.E. Boyd ◽  
J.C. Spitzer ◽  
D.W. Forrest ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Beef Cows ◽  
Protein Supplementation ◽  
Dietary Energy ◽  
Short Term

scholarly journals Effect of different protocols for estrus synchronization on reproductive performance of Santa Inês ewes under Amazon environmental conditions

2020 ◽  
Vol 43 ◽  
pp. e48954
Author(s):  
Regina Oliveira da Silva ◽  
Roseane Pinto Martins de Oliveira ◽  
André Ferreira Silva ◽  
Franklyn Ferreira de Oliveira ◽  
João Paulo Ferreira Rufino ◽  
...  
Keyword(s):  
Experimental Design ◽  
Pregnancy Rate ◽  
Reproductive Performance ◽  
Environmental Conditions ◽  
Pregnancy Rates ◽  
Estrus Synchronization ◽  
Test Results ◽  
Short Term ◽  
Santa Inês

 The objective of this study was to evaluate the effect of different hormonal protocols on the reproductive performance of Santa Inês ewes in Amazon environmental conditions. Twenty-two Santa Inês ewes between 3 and 4 years-old were distributed in a randomized block experimental design, where the treatments consisted of two protocols for estrus synchronization (short and long) with eleven animals each. Data on the occurrence of estrus were described for each protocol. Data of estrus, pregnancy, and prolificity were firstly subjected to ANOVA and a subsequent Tukey’s test. Results were considered significant at p ≤ 0.05. The short-term protocol presented an interesting successful rate, where above 70% ewes tested had estrus. The long-term protocol also achieved a high successful rate, where above 80% ewes tested had estrus. However, comparing the protocols, the long-term protocol presented better results of positive estrus and pregnancy rates in ewes. Thus, it can be concluded that both protocols presented satisfactory results regarding estrus manifestation, and prolificity (lambs produced per ewe). However, under Amazon environmental conditions, the long-term protocol presented better results regarding positive manifestation of estrus and pregnancy rate.

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