Publikationsdatum:
2021-07-11
Beschreibung:
Shear stress, generated by water movement, can kill fish eggs and larvae by causing rotation or deformation. Through the use of an experimental apparatus, a series of shear(as dynes/cm2)-mortality equations for fixed time exposures were generated for striped bass and white perch eggs and larvae. Exposure of striped bass eggs to a shear level of 350 dynes/cm2 kills 36% of the eggs in 1 min; 69% in 2 min, and 88% in 4 min; exposure of larvae to 350 dynes/cm2 kills 9.3% in 1 min, 30.0% in 2 min, and 68.1% in 4 min. A shear level of 350 dynes/cm2 kills 38% of the white perch eggs in 1 min, 41% in 2 min, 89% in 5 min, 96% in 10 min, and 98% in 20 min. A shear level of 350 dynes/cm2 applied to white perch larvae destroys 38% of the larvae in 1 min, 52% in 2 min, and 75% in 4 min. Results are experimentally used in conjunction with the determination of shear levels in the Chesapeake and Delaware Canal and ship movement for the estimation of fish egg and larval mortalities in the field.
Beschreibung:
UMCES - CBL
Beschreibung:
UMCES(University of Maryland Center for Environmental Science. Contribution no. 666
Schlagwort(e):
Management
;
Fisheries
;
Engineering
;
Striped Bass
;
White Perch
;
Shear
Repository-Name:
AquaDocs
Materialart:
article
,
TRUE
Format:
application/pdf
Format:
application/pdf
Format:
149-154
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