Revisiting sardine recruitment hypotheses: Egg‐production‐based survival index improves understanding of recruitment mechanisms of fish under climate variability

Intermittent Lighting Improves the Efficiency of Artificial Insemination in Cage Housed Laying Hens Kavtarashvili A.Sh., Kolokolnikova T.N. Federal Scientific Center “All-Russian Research and Technological Poultry Institute” of Russian Academy of Sciences Omsk Agrarian Scientific Center Summary: The effects of different lighting regimes on the oviposition schedule, productive performance, and reproductive efficiency in cage housed laying hens of layer parental flock (Hisex White-R) were studied; the reasonable regime of artificial insemination (AI) under intermittent lighting is proposed. It was found that intermittent lighting regime 1L:4D:4L:1D:4L:10D compared to the constant lighting significantly alters oviposition schedule: under this regime 82.3% of all daily eggs were laid until 9 am (vs. 66.6% in control). This regime and AI at 10 am improved the productive and reproductive performance compared to control (constant lighting 16L:8D and AI at 12 am): mortality by 1.9%, egg production per initial hen by 3.8%, egg weight by 1.1%, percentage of eggs suitable for incubation by 1.9%, egg fertility by 0.9%, hatchability by 2.3%, hatch of chicks by 2.9%, feed conversion ratio (kg of feed per 10 eggs) by 5.3%, the expenses of electric energy for lighting (per 1000 eggs suitable for incubation) by 54.5%. Key words: INTERMITTENT LIGHTING, CAGE HOUSED LAYERS, ARTIFICIAL INSEMINATION (AI), OVIPOSITION SCHEDULE, AI TIMING, PRODUCTIVE PERFORMANCE, REPRODUCTIVE PERFORMANCE

Study of the Climate Variability in Southeastern Bangladesh and its Relation with Teleconnection Parameters of Tropical Pacific Ocean

Global Journal For Research Analysis ◽

10.15373/22778160/january2014/60 ◽

2012 ◽

Vol 3 (1) ◽

pp. 113-115

Author(s):

Md. Fazlul Haque ◽

◽

Suraiya Begum ◽

Dewan Abdul Quadir

Keyword(s):

Pacific Ocean ◽

Climate Variability ◽

Tropical Pacific ◽

Tropical Pacific Ocean

Implications of Climate Variability on Market Gardening Crop Production in Santa Sub-Division of Cameroon

Greener Journal of Environment Management and Public Safety ◽

10.15580/gjemps.2015.1.031114142 ◽

2015 ◽

Vol 4 (1) ◽

pp. 009-018

Author(s):

Sani Gur Amawa ◽

◽

Tata Emmanuel Sunjo ◽

Edwin Awambeng Azieh ◽

Jude Ndzifon Kimengsi ◽

...

Keyword(s):

Climate Variability ◽

Crop Production ◽

Market Gardening

Supporting High Welfare Cage-Free Egg Production in China

10.15868/socialsector.36545 ◽

2020 ◽

Author(s):

Kate Hartcher Hartcher

Keyword(s):

Egg Production ◽

High Welfare