Salmo

Question 1

What are general characteristics of genus Salmo?

Answer 1

FW and anadromous, iteroparous, slamonids, naturally occurring in N Atlantic basin (north eastern North America, thourghout most of Europe and european arctic).

Question 2

Who are Salmo species most easily confused with?

Answer 2

most primitive members of Oncorhynchus

Question 3

What distinguishes salmo Juves from other Salmonidae?

Answer 3

usually have red spots between the parr marks.

Question 4

Which genus aside salmo have teeth on the vomer shaft?

Answer 4

oncorhynchus

Question 5

How to distinguish an escaped ATL in the pacific?

Answer 5

Anal fin rays (8-12, whereas Pac Salmon have 13 or greater). ATL have ofter 3 large spots on their gill cover. ATL lack spots on their tails.

Question 6

How to differentiate ATL fry from pac salmon:

Answer 6

long pectoral fins. they extend to the dorsal fin. Clear adipose fin seperates from brown trout.

Question 7

what are the three recognized groups of ATL salmon?

Answer 7

Eastern North American, European, and Baltic.

Question 8

How do you know that atlantic salmon survived in the atlantic refugia?

Answer 8

b/c they are genetically distinct from the european ones.

Question 9

how long do atl samon parr spend in FW?

Answer 9

1-3 years

Question 10

do atl have precocious males?

Answer 10

yes

Question 11

how many winters at sea by the time ATL salmon are usually mature?

Answer 11

3-5

Question 12

Juvenile Atlantics eat what?

Answer 12

mostly drift feeders, on chironomids and nymphs.

Question 13

How does the shape of the trailing edge of the anal fin differ in the sexes of Atl Salmon?

Answer 13

the posterior edge of the anal fin is convex in adult males and concave in females and juveniles.

Question 14

What are the leading factors to the decline of Atlantic salmon? What is now the main culprit?

Answer 14

over fishing, acid rain, habitat destruction, global warming and aquaculture. Acid rain is the big one.

Question 15

How does farmed salmon affect the local stocks for Atlantic salmon?

Answer 15

interbreeding with wild stocks, sea lice

Question 16

Distinguishing characteristics of a brown trout

Answer 16

black and some red spots on the body. pale haloes surround spots, and red spots occur only on the lower flanks. no spots on tail

Question 17

how do you tell a brown trout from a clarki or rbt?

Answer 17

no spots on the tail

Question 18

How to tell Trutta JUVES from rbt and clarki?

Answer 18

orange adipose fin.

Question 19

Native distribution of brown trout

Answer 19

Native only to eurasia

Question 20

What continent is Brown trout NOT found?

Answer 20

Antartica

Question 21

What are anadromous populations of brown trout called?

Answer 21

sea trout

Question 22

What are the two SW habitual choices that Brown trout make?

Answer 22

one type remain at sea for extended periods of one year or more like steelhead, while others remain near their estuaries and return to fresh water each winter, like cutthroat.

Question 23

Which is the most variable species of all the salmonids?

Answer 23

brown trout, with up to 50 different species.

Question 24

What is an example of brown trout being a species complex?

Answer 24

numerous examples of genetically distinct sympatric pairs within systems.

Question 25

How are brown trout classified for feeding habits?

Answer 25

as opportunistic feeders

Question 26

What time of year do brown trout spawn?

Answer 26

fall

Question 27

how does the trailing edge of the anal fin differ amongst sexes for brown trout?

Answer 27

convex in males, concave in females

Question 28

What is one of the most difficult salmonid to catch?

Answer 28

brown trout.