Variations in Egg Production Rates by Pseudocalanus Spp. In a Subarctic Alaskan Bay During the Onset of Feeding by Larval Fish

1990 ◽  
Vol 10 (4) ◽  
pp. 648-658 ◽  
Author(s):  
A. J. Paul ◽  
K. O. Coyle ◽  
D. A. Ziemann
Keyword(s):  
Egg Production ◽  
Larval Fish ◽  
Production Rates

Egg production rates of the neritic marine copepod Acartia tumida Willey in the Aleutian Archipelago

Polar Biology ◽  
1993 ◽  
Vol 13 (8) ◽  
Author(s):  
R. Patrick Hassett ◽  
DavidO. Duggins ◽  
CharlesA. Simenstad
Keyword(s):  
Egg Production ◽  
Production Rates ◽  
Marine Copepod

scholarly journals Ichthyoplankton distribution and plankton production related to the shelf break front at the Avilés Canyon

2003 ◽  
Vol 60 (2) ◽  
pp. 198-210 ◽  
Author(s):  
R González-Quirós ◽  
J Cabal ◽  
F Álvarez-Marqués ◽  
A Isla
Keyword(s):  
Primary Production ◽  
Egg Production ◽  
Larval Fish ◽  
Fish Larvae ◽  
Abundant Species ◽  
Physical Structure ◽  
Shelf Break ◽  
Phytoplankton Productivity ◽  
Plankton Production ◽  
Avilés Canyon

Abstract The overall objective of this study was to search for spatial differences in primary production and its transference towards larval fish related with the distribution of water masses at shelf break of the Avilés Canyon. High primary production and ichthyoplankton abundance were associated with a shelf break front at the Avilés Canyon. Egg distributions of Scomber scombrus, Sardina pilchardus and Trachurus trachurus, coupled with topography, the associated physical structure and phytoplankton productivity, suggested adaptive spawning strategies. The distribution of copepod stages, which are considered the trophic link between primary producers and fish larvae, was not related with the position of the front. Moreover, the egg production of two abundant species (Calanus helgolandicus and Acartia clausi) was not significantly related with phytoplankton abundance and productivity.

scholarly journals Effect of Magnetic Technology of water treatment on egg production, Egg weight and Egg quality in leghorn pullets.

2012 ◽  
Vol 6 (2) ◽  
pp. 42-45
Author(s):  
Ali H. Al-Hillali
Keyword(s):  
Water Treatment ◽  
Shell Thickness ◽  
Egg Production ◽  
Egg Quality ◽  
Science And Technology ◽  
Poultry Farm ◽  
Production Rates ◽  
Egg Weight ◽  
Technological Method ◽  
Magnetic Water

he study was conducted at the poultry farm, Department of animal genetics/ Ministry of science and Technology for the period between 2/10/2007-8/1/2008 to investigate the efficiency of magnetic technology of water (MTW) in egg production, egg weight and egg quality in leghorn pullets.120 pullets were randomly distributed and subjected to four treatment, (T1) represented control, and T2,T3,T4 represented treatment of MTW with strength (500,1000,1500) gauses. The results showed Significant increasing in egg production rates (H.D) and significant (P≤0.05) improvement in consumed feed and conversion, also the results had shown increase in egg weight, Haugh units, shell thickness and yolk index. The results indicated that treatment with magnetic water is a good technological method for improvement of egg production and quality.

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