Leave a comment

Sharks: Immaculate Conception

black-tip-e1518547883784.jpg

Blacktip Shark

By far, the biggest on the list

Parthenogenesis has been known to occur in several species of shark, including blacktip, zebra, carpet, white-spotted bamboo, bonehead, and even some kinds of hammerhead sharks. The phenomenon has primarily been observed in captivity when females have been isolated from males. Under these circumstances, some females have the ability to switch from sexual reproduction to parthenogenesis. While this is likely an evolutionary trait that allows a species to survive when mates are scarce, some researchers worry it could lead to a lack of genetic diversity and endanger long-term shark survival in the wild.

While many older studies suggest that the offspring of this phenomenon is less equipped for survival, there are examples of fully capable offspring from self-fertilization. However, there is not sufficient evidence on whether parthenogenesis occurs similarly in nature, as all observations of this process has occurred while the shark was in captivity.

 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: