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Biology 385 > Lamprey Lab > Flashcards

Lamprey Lab Flashcards

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1
Q

What fins are not present in lamprey?

A

Pectoral and pelvic

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2
Q

With hagfishes (Mxyninoidea), what group are lamprey (Petromyzontoidea) part of?

A

Cyclostomata

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3
Q

How many species of lamprey?

A

~50

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4
Q

Where does Petromyzon marinus live?

A

Native to the Atlantic Ocean, but invasive species in the Great Lakes

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5
Q

Do lamprey have scales?

A

No, but it is covered in mucus

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6
Q

What kind of tail do lamprey have?

A

Diphycercal

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7
Q

Which lamprey sex has an anal fin?

A

Females

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8
Q

Which lamprey sex has copulatory papillae?

A

Males

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9
Q

What are lamprey teeth made of?

A

Keratin

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10
Q

What sense organs do lamprey have (4)?

A
  • One central naris
  • Pineal organ for photoreception
  • Well-developed lateral eyes
  • Lateral line system
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11
Q

What fins do lamprey have?

A

Anterior and posterior dorsal fins, caudal fin

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12
Q

What kind of skeleton do lamprey have?

A

Cartilaginous

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13
Q

What do lamprey have instead of true vertebrae?

A

Arcualia, which are cartilaginous structures dorsal to the notochord and embedded in connective tissue

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14
Q

What does the lamprey use for respiration?

A

Seven gill pouches separated from each other by a septum but all connected to the respiratory tube

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15
Q

How many gill pouches does a lamprey have?

A

Seven

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16
Q

How many chambers in the lamprey’s heart?

A

Three

17
Q

Blood from the body enters the __.

A

sinus venosus

18
Q

The blood moves from the atrium to the ventricle, and is pumped into the __ on to the __.

A

conus arteriosus, ventral aorta

19
Q

How many pairs of afferent branchial arteries take blood from the lamprey’s heart to the gills ?

A

eight

20
Q

How do lamprey feed?

A

They latch on to their prey with a sucker-like mouth and rasp away at the host’s tissues with their tongue.

21
Q

Do all lamprey eat tissue?

A

No, some species eat liquid, some eat flesh, it depends on what their tongue is like

22
Q

How does the lamprey eat and breathe at the same time?

A

It has a subdivided pharynx. The ventral part forms a respiratory tube that is separated from the mouth by a valve called the velum.

23
Q

Lamprey have a __ liver.

A

Biolobed

24
Q

Does the lamprey have a gall bladder?

A

No

25
Q

Where do lamprey store fat?

A

Hepatic (liver) tissue

26
Q

Do lamprey have a pancreas?

A

Yes but it is not distinct, it is not separate from the intestine, and cells in the anterior intestine secrete enzymes to help with digestion.

27
Q

What kind of water do lamprey inhabit?

A

They live in saltwater, except the invasive ones, but they spawn in freshwater.

28
Q

What kind of fertilization do lamprey use?

A

External

29
Q

How many eggs does a lamprey produce?

A

30,000 to 100,000 in a nest called a redd in the stony river

30
Q

When do lamprey die?

A

After spawning

31
Q

What are lamprey larvae called?

A

Ammocoetes

32
Q

When do lamprey ammocoetes transform to their adult form?

A

3 or 4 years old; key changes in kidney function (now needs to live in saltwater) and in the mouth

33
Q

How long do lamprey live?

A

5 to 10 years

Biology 385 (10 decks)

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