scholarly journals Environmental Factors Affecting the Survival of Juveniles and Recent Returns of Chum Salmon in the Okhotsk Coast of Hokkaido

2018 ◽  
Keyword(s):  
Environmental Factors ◽  
Chum Salmon ◽  
Factors Affecting

Review of Certain Environmental Factors Affecting the Production of Pink and Chum Salmon

1958 ◽  
Vol 15 (5) ◽  
pp. 1103-1126 ◽  
Author(s):  
W. P. Wickett
Keyword(s):  
Environmental Factors ◽  
Preliminary Data ◽  
Chum Salmon ◽  
Environmental Changes ◽  
Early Stage ◽  
Factors Affecting ◽  
Stream Discharge ◽  
Ocean Conditions

The relation between stock and numbers of spawners is obscured by annual environmental changes. Stream discharge at the time the spawners are migrating upstream, at the time when the eggs are in the early stage of incubation, and extreme discharge during the period eggs and alevins are in the gravel can impose an 8-fold variation in the stock resulting from a given number of spawners in one area. Ocean conditions soon after the fry enter the sea have been observed to increase or decrease survival by a factor of 3. The density of spawners that produces the greatest numbers of fry is related to the average permeability of the stream bottom. Preliminary data indicate that more spawners could be used to advantage in most areas of the coast.

Environmental factors affecting reproducibility of bioremediation field assays in Antarctica

2020 ◽  
Vol 169 ◽  
pp. 102915 ◽  
Author(s):  
L.M. Martínez Álvarez ◽  
L.A.M. Ruberto ◽  
J.M. Gurevich ◽  
W.P. Mac Cormack
Keyword(s):  
Environmental Factors ◽  
Factors Affecting

scholarly journals Host and Environmental Factors Affecting the Intestinal Microbiota in Chickens

2018 ◽  
Vol 9 ◽  
Author(s):  
Jannigje G. Kers ◽  
Francisca C. Velkers ◽  
Egil A. J. Fischer ◽  
Gerben D. A. Hermes ◽  
J. A. Stegeman ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Intestinal Microbiota ◽  
Factors Affecting

Species Responses to Grazing and Environmental-Factors in an Arid Halophytic Shrubland Community

1987 ◽  
Vol 35 (2) ◽  
pp. 135 ◽  
Author(s):  
RB Hacker
Keyword(s):  
Environmental Factors ◽  
Soil Salinity ◽  
Large Scale ◽  
Chemical Properties ◽  
Grazing Pressure ◽  
Aerial Photographs ◽  
Small Scale ◽  
Factors Affecting ◽  
Species Responses

Species responses to grazing and environmental factors were studied in an arid halophytic shrubland community in Western Australia. The grazing responses of major shrub species were defined by using reciprocal averaging ordination of botanical data, interpreted in conjunction with a similar ordination of soil chemical properties and measures of soil erosion derived from large-scale aerial photographs. An apparent small-scale interaction between grazing and soil salinity was also defined. Long-term grazing pressure is apparently reduced on localised areas of high salinity. Environmental factors affecting species distribution are complex and appear to include soil salinity, soil cationic balance, geomorphological variation and the influence of cryptogamic crusts on seedling establishment.

Identification of environmental factors affecting the speed of purebred Arabian racehorses in The Netherlands

2009 ◽  
Vol 125 (1) ◽  
pp. 97-100 ◽  
Author(s):  
A. Schurink ◽  
M.C.J. Theunissen ◽  
B.J. Ducro ◽  
P. Bijma ◽  
E.M. van Grevenhof
Keyword(s):  
Environmental Factors ◽  
The Netherlands ◽  
Factors Affecting
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