Unisexual (in CC amphib glossary)

John

Founder
Staff member
Joined
Feb 6, 2001
Messages
7,964
Reaction score
49
Points
48
Age
42
Location
USA
Country
Ireland
Display Name
John Clare
Unisexual is a term used to describe a species in which individuals exhibit the characteristics of only sex, for example males or female (compare this to an animal that has both sets of reproductive characteristics, a hermaphrodite).

In the world of salamanders this word is most frequently applied to the complex of hybrid Ambystoma species, i.e. "Unisexual Ambystoma". In this context it describes the fact that all of the hybrid specimens in the complex are female, irregardless of the combination of Blue-spotted, Small-mouth, Jefferson or Eastern Tiger DNA.
 

Jennewt

Administrator
Staff member
Joined
May 27, 2005
Messages
12,407
Reaction score
73
Points
48
Location
USA
Country
United States
Could there be a unisexual male species? I'm having trouble imagining this! If not, then a unisexual species could be more simply defined as a species consisting entirely of females. They reproduce by a sort of "cloning" method called parthenogenesis.

We have some parthenogenic whiptail lizards here in New Mexico. The amazing thing that I just learned is that they still have to "mate" in order to reproduce. Two females go through the typical whiptail mating rituals, with one acting the part of the male. This activity is necessary for them to produce the hormones needed to produce viable eggs. I suppose I'm digressing from the salamander context...
 

John

Founder
Staff member
Joined
Feb 6, 2001
Messages
7,964
Reaction score
49
Points
48
Age
42
Location
USA
Country
Ireland
Display Name
John Clare
Well in a salamander context unisexual means female to the best of my knowledge but the word can mean either male or female.
 

Jan

Site Contributor
Joined
Mar 3, 2006
Messages
1,626
Reaction score
32
Points
0
Location
Philadelphia, PA
Country
United States
Well in a salamander context unisexual means female to the best of my knowledge but the word can mean either male or female.
John and Jen
I found this reference to sterile males:
All individuals of these complexes are female (referring to the hybrid Ambystoma complexes), except for a very small percentage (~1%) which appear to be sterile males.

From: Unisexual "Hybrid" Salamander Complexes, Ambystoma spp.

Should the original definition be amended to include this? Probably so.
 

Jan

Site Contributor
Joined
Mar 3, 2006
Messages
1,626
Reaction score
32
Points
0
Location
Philadelphia, PA
Country
United States
How about this as a final definition:

Unisexual:
A term used to describe an organism in which individuals exhibit the characteristics of only one sex, for example female or male (compare this to an animal that has both sets of reproductive characteristics, a hermaphrodite). In the world of salamanders this word is most frequently applied to the "Ambystoma jeffersonianum complex" i.e., "Unisexual Ambystoma Complexes". In this context it describes the fact that all individuals of these complexes are female, except for a very small percentage (~1%) which appear to be sterile males regardless of the combination of Blue-spotted, Small-mouth, Jefferson or Eastern Tiger DNA.
 
General chit-chat
Help Users
  • No one is chatting at the moment.
  • (Guest) Taro Tea:
    Will anything happen to my axolotl??
  • Mother of Dragons:
    keep adding prime everyday for a week and your axolotl should be ok
    +1
    Unlike
  • Chat Bot:
    Guest guy has joined the room.
  • (Guest) guy:
    hey
  • sde:
    Caudata.org chat? Haven’t seen this in years
    +1
    Unlike
  • Dougie:
    @sde, hi everybody I'm getting a tiger salamander coming from Katy Texas what are the shipping conditions that's okay to have them shipped to me in the state of Vermont it's just starting to get the temperature low above 45 but it may be too hot to ship him any thoughts or ideas on how to work this out
    +1
    Unlike
  • newtmember:
    as long as its not freezing they should ship fine. I usually ship mine in 2 days priorities like axolotl. insulation and some cold pack. Is this morphed or still a larvae?
    +1
    Unlike
  • macmac194:
    Greetings I have a quaratined tiger salamander due to not feeding and feeling lethargic. I saw a slimy green stuff inside the enclosure. Is this vomit? Poop?
    +1
    Unlike
  • Jjrio421:
    Are you still looking to rehome any of your axolotl babies?
    +1
    Unlike
  • Chat Bot:
    Guest nagato has joined the room.
  • (Guest) nagato:
    Does anybody know where or who to buy danube crested newts from?
  • Mother of Dragons:
    Anyone in the DMV area looking for juvenile axolotls? I have several morphs available. Experienced owners and pickup only please.
    +1
    Unlike
  • Chat Bot:
    Guest axmaolotl has joined the room.
  • Ariania Lee-Ann:
    I currently have a 3 year old axolotl, he hasn't been eating for the past couple of weeks and has lost a lot of weight. Hedwig usually eats bloodworms and earthworms just fine but now he won't even stud it. I've done a water change to make his nitrate lower and his water is at a good temperature
    +1
    Unlike
  • Chat Bot:
    Guest zippy has joined the room.
  • (Guest) zippy:
    what substrate is he on?
  • Linkisnotzelda:
    Are any of you guys on Quora? I’ve started an axolotl space there and am looking for people interested in helping out!
    +1
    Unlike
  • KarateKid08:
    I am wanting a spotted or tiger salamander and I was wondering how often to feed, what the best feeders would be and how many fed per feeding session.
    +1
    Unlike
  • Chat Bot:
    KarateKid08 has left the room.
    +1
    Unlike
  • Chat Bot:
    KarateKid08 has joined the room.
    +1
    Unlike
  • newtboi:
    Can I has alpine newts pls
    +1
    Unlike
  • ndbug:
    Any ambystoma breeders looking for californiense
    +1
    Unlike
  • axolotl owner2020:
    does anybody have any information on homemade baby axolotl food?
    +1
    Unlike
  • axolotl owner2020:
    I have an earthworm farm, and a tight budget.
    +1
    Unlike
  • Naxuzi:
    Hey guys I was wondering if my axolotl looks fine to you he/she (still don’t know) I’d activate and eating as usual but I did notice veins in the tail area.. let me know what you guys think! Also if anyone could tell if it’s a boy or girl that would be great! (Zolo was eating a worm and pretty sure the worm pooped XD)
    +2
    Unlike
    Naxuzi: Hey guys I was wondering if my axolotl looks fine to you he/she (still don’t know) I’d activate... +2
    Top