E

EA: - Enterprise Allocation
A quota from a certain species that is allocated to a company.

EFF - Eastern Fishermen's Federation
A Maritime umbrella organization made up of inshore fishermen's organizations.

ESFPA - Eastern Shore Fishermen's Protective Association
Inshore fishermen's organization representing multi-species license holders on the Eastern Shore of Nova Scotia, under the umbrella of the EFF.

Echo sounder
A portable electronic device that uses sonar to determine the depth of water, and display the information on a read-out. Boat anglers fishing large still waters find them very useful.

Ecosystem
A system formed by the interaction of a community of organisms within their environment

Edge concept
Edges can be related to areas of temperature, water clarity, current, or structures, and they often hold catchable fish; e.g., active, feeding bass found on the weedline

Eel
Freshwater eels are migratory fish that live in all sorts of waters but spawn in the Sargasso Sea in the Atlantic Ocean. You can catch them on a variety of bottom-fished baits, especially lobworms and small deadbaits. They feed well on summer nights. but they rarely feed in winter. They grow to more than 4.5kg (10lb), but fish over 2.3gk (5lb) are a rare catch.

Eel section
A section of eel body used as a deadbait when fishing for pike or zander.

Effeciveness Of Fishing
A general term referring to the percentage removal of fish from a stock, but not as specifically defined.as either rate of exploitation or instantaneous rate of fishing.

Egg sinker
A type of weight shaped like an egg with a hole in the middle

Egg take
The number of eggs taken at hatcheries when adult salmon and steelhead are spawned.

Egg-to-smolt survival
The numerical difference between the number of fertilized eggs produced by a groups of fish and the number of smolts resulting from those eggs.

Elderberries
Soft, ripe elderberries can be an effective hookbait for roach, especially when loosefeeding hempseed.

Electronic bite alarm
A compact, battery-operated device for legering, mainly used by carp anglers. It detects line movement, which it registers with a beep, or buzz, and a small light.

Elver
A young freshwater eel. They migrate from their birthplace in the Sargasso Sea to rivers and lakes all over Europe and the Americas, where they mature into fully-grown eels, ready to make the migration back to their spawning grounds.

Emarginate
Having the margin notched.

Embeddedness
The degree to which dirt is mixed in with spawning gravel.

Embryo
The early stages of development before an organism becomes self supporting.

Emergence
The process during which fry leave their gravel spawning nest and enter the water column.

Emerger
An aquatic insect in the process of rising to the surface to become a flying adult.

Emigration
Referring to the movement of organisms out of an area. See immigration and migrating.

Epilimnion
The warm layer of water above the thermocline

Equlibrium Catch
The catch (in numbers) taken from a fish stock when it is in equilibrium with fishing of a given intensity, and (apart from the effects of environmental variation) its abundance is not changing from one year to the next.

Equlibrium Yield
The yield in weight taken from a fish stock when it is in equilibrium with fishing of a given intensity, and (apart from effects of environmental variation) its biomass is not changing from one year to the next. Also called; sustainable yield, equivalent sustainable yield.

Euryhaline
Having a wide tolerance to salinity.

Eutrophic lake
a body of water that is rich in dissolved nutrients, but can be deficient in oxygen.

Even-year run
A population of fish that returns to its natural spawning grounds in even numbered years.

Exotic species
A species that is not native to a body of water, but has been introduced to it intentionally or by accident

Exploitation pattern
The distribution of fishing mortality over the age composition of the fish population, determined by the type of fishing gear, area and seasonal distribution of fishing, and the growth and migration of the fish. The pattern can be changed by modifications to fishing gear, for example, increasing mesh or hook size, or by changing the ratio of harvest by gears exploiting the fish (e.g., gill net, trawl, hook and line, etc.).

Exploitation rate
The proportion of a population at the beginning of a given time period that is caught during that time period (usually expressed on a yearly basis). For example, if 720,000 fish were caught during the year from a population of 1 million fish alive at the beginning of the year, the annual exploitation rate would be 0.72.

Eyed egg
A fish egg containing an embryo that has developed enough so the eyes are visible through the egg membrane.

Eyed hook
A hook with a small eye on the end of the shank, through which you thread and knot the line. Eyed hooks are mainly used in the larger sizes, from size 16 up.