Mechanical fish lift

Mechanical fish lift

Mechanical fish lift

Pressure hammer

Killing salmon with pressure hammer

Pressure hammer

Killing salmon with pressure hammer

Eyed chum salmon eggs being poured into trenches which were later filled with gravel. Survival to migrant stage has exceeded 90 percent using these methods at the Abernathy incubation channel.

Sardine larva and other plankters from the Gulf of California

Studying micro-projection of Pacific sardine ova

Studying micro-projection of Pacific sardine scale

temperature gradient block for the study of the growth and development of sardine embryos and larvae.

temperature gradient block for the study of the growth and development of sardine embryos and larvae.

Drawing blood sample from Pacific sardine. Blood typing studies contribute to population research through studies of the inherited properties of the red blood cells.

Collecting blood for serological tests used to detect subpopulations of sardines .

Project leader of subpopulation program drawing blood from sardines for genetic studies.

? Basket for removing sardines from fishing vessel and bringing to cannery.

Preparing sardines for pre-cooking ?

Pre-cooking sardine in cannery

Women on assembly line at sardine cannery

Women on assembly line at sardine cannery

Cans of sardines on assembly line

Putting cans of sardines into cartons at a sardine canning plant.

A lot of sardine cans

Sardine cans going in the cooker at a sardine canning plant

Atlantic salmon (Salmo salar

Drawing by H. L. Todd of the Atlantic Salmon (Salmo salar)

Salmon ascending falls on way to spawning ground

Mike Houdikoff's son netting sockeye salmon on creek above village.

Counting of red salmon smolts, night operations.

Red salmon

Behavior studies are of great importance in modern fishery research in order to answer questions about the swimming ability of salmon fingerlings, responses to electrical stimulus, responses under varying temperatures, and to provide information on their physiology and general behavior. This provides management information for fishway design, electrical guiding, and production.

Preparation of blood samples for testing in salmon serological studies.

An agar diffusion disc used in serological studies. The lines formed around the container in the center are used in determining the differences in races of salmon. This shows the reaction specific anti-sera in samples from several areas.

The Pacific Coast Salmon Problem showing the range of salmon and the number of salmon streams throughout the area.

Counting live and dead salmon eggs from "egg sack plants" is necessary to determine the factors and rates of survival for overall production estimates of a river system. Production estimates provide material for basing regulations, and insuring proper utilization and management.

Salmon leapi9ng up waterfalls on way to spawning ground.

Fry trap installation at Cannery Creek, showing method of hanging traps and spacing of traps across stream.

Migrating salmon jumping falls

Metal trap used in enumerating pink and chum salmon fry in Prince William Sound streams.

Fry trap installation at Olsen Bay

Fry trap installation at Whale Bay, showing method of securing traps by cable, and spring snow conditions.

Marked pink salmon fry in livebox

An intertidal spawning area at low tide.

Chum salmon

Pink salmon

Chum salmon spawners

Measuring machine used to measure salmon aboard the FWS vessel JOHN N. COBB.

Measurements taken of the specimens in the catch of the FWS vessel JOHN N. COBB.

Sockeye salmon purse seiners racing to a favorite spot to make sets at the turn of the tide.