Repro in fish and reptiles

Question 1

where are the testis found in reptiles?

Answer 1

Intra-abdominal

Question 2

Reptiles have no accessory sex glands but what do squamates and chelonians have with regards to a phallus?

Answer 2

Chelonians= penis

Squamates= hemipenes

Question 3

What happens during the breeding season to reptile kidneys?

Answer 3

Sexual segment during breeding season in
distal convoluted tubules of kidney,
eosinophillic granules, purpose unknown.

Question 4

What are some species of snake missing?

Answer 4

Left oviduct

Question 5

Where is albumin secreted in reptiles?

Answer 5

The oviduct

Question 6

Do reptiles have a uterus?

Answer 6

No true uterus.

Question 7

What is vitellogenesis?

Answer 7

Yolk formation

Question 8

What are the unusual forms of reproduction in reptiles?

Answer 8

Intersex (Hermaphrodite) — some spp.
— Can be fertile
Parthenogenesis - asexual reproduction
(some lizards): embryo develops as if
female mated

Question 9

Where does fertilisation occur?

Answer 9

Cranial oviduct

Question 10

How long can sperm survive in reptile?

Answer 10

Up to 6 years

Question 11

What does viviparous mean?

Answer 11

Live bearing young.

— Egg in tract until hatching (nutrients mostly
from yolk)
. Eggs Hatches at time of parturition. Eggs hatches in
the tract.

Question 12

What is matrotrophy?

Answer 12

Matrotrophy is a form of maternal care during animal development, associated with live birth (viviparity), in which the embryo of an animal or flowering plant is supplied with additional nutrition from the mother (e.g. through a placenta).

Question 13

What species is entirely oviparous?

Answer 13

chelonians

Question 14

What percentage of squamates are viviparous?

Answer 14

20%

Question 15

squamates have one GnRH what is it like?

Answer 15

FSH

Question 16

What is a continuous reproductive cycle?

Answer 16

(Tropical Zone) can breed throughout whole year.

Question 17

What is a associative reproductive cycle?

Answer 17

(Subtropical or Temperate Zone) Sex
hormone secretion stimulate activity. Most pet
reptiles have this type.
— Male and Female: gonadal/hormonal events
coincide. Gonadal activity at time of mating
— Long active season
— Hibernation

Question 18

What is a dissociated reproductive cycle?

Answer 18

Dissociated (Some Temperate Zone) Mate in
summer, store sperm during winter and ovulate
and fertilise in spring. snake.
— Female and male repro events not linked
— Gonadal activity doesn’t coincide with mating
— Short active season

Question 19

What are the sex determining techniques for reptiles?

Answer 19

Endocrinology (blood)
— Breeding season (hormone production)
Ultrasonography
— Particularly if female and has eggs
Endoscopy (surgical sexing)
—Anaesthetics
Cloacal probe for hemipene

Question 20

What does gymnovarian mean with regards to fish?

Answer 20

Oocytes into coelom —) reaches oviduct

remnants in posterior coelom.

Question 21

What does cystovarian mean with regards to fish?

Answer 21

Ovarian ducts (not oviducts)

Question 22

What are common environmental factors on reproduction of fish?

Answer 22

. Photoperiod
. Temperature
. Presence opposite sex
. Currents, tides, stage of moon
. Whether they are in a spawning area