Quantitative relations between fishing mortality, spawning stress mortality and biomass growth rate (computed with numerical model FISHMO)

Technical Report · Sat Jan 01 00:00:00 EST 1983

OSTI ID:6254762

Laevastu, T

The effects of fishing on a given species biomass have been quantitatively evaluated. A constant recruitment is assumed in this study, but the evaluation can be computed on any known age distribution of exploitable biomass. Fishing mortality is assumed to be constant with age; however, spawning stress mortality increases with age. When fishing (mortality) increases, the spawning stress mortality decreases relative to total and exploitable biomasses. These changes are quantitatively shown for two species from the Bering Sea - walleye pollock, Theragra chalcogramma, and yellowfin sole, Limanda aspera.

• Research Organization: National Marine Fisheries Service, Seattle, WA (USA). Northwest and Alaska Fisheries Center
• OSTI ID: 6254762
• Report Number(s): PB-83-169995
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
FISHERIES
MORTALITY
BERING SEA
BIOLOGICAL STRESS
BIOMASS
FISHES
GROWTH
MATHEMATICAL MODELS
POPULATION DYNAMICS
ANIMALS
AQUATIC ORGANISMS
ENERGY SOURCES
PACIFIC OCEAN
RENEWABLE ENERGY SOURCES
SEAS
SURFACE WATERS
VERTEBRATES
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)