1 / 16

Rusty Crayfish

Rusty Crayfish. Orconectes rusticus. Current Distribution. Background. Originated in the Ohio River Basin, Kentucky and Ohio. Introduced to Wisconsin in the early 1960’s. Spread through use as fishing bait, educational purposes, pets. Inhabit lakes, ponds, streams, and rivers.

kalli
Download Presentation

Rusty Crayfish

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Rusty Crayfish Orconectes rusticus

  2. Current Distribution

  3. Background • Originated in the Ohio River Basin, Kentucky and Ohio. • Introduced to Wisconsin in the early 1960’s. • Spread through use as fishing bait, educational purposes, pets. • Inhabit lakes, ponds, streams, and rivers. • One female possessing sperm and eggs start a population.

  4. Typical Decapoda(order) Life Cycle

  5. Egg bearing Female

  6. Male and Female Arrow points to the gonopod legs on a male. Seminal receptacle found on females.

  7. Negative environmental impacts • Displace native crayfish species. • Food consumption • Disrupt reproduction cycle • Destruction of ecosystem • High growth rate Native Orconectes obscurus

  8. Negative Economic impacts • Reduction of sporting species • Decreased recreation usability • Aquatic maintenance costs

  9. Sparkling Lake, Wisconsin

  10. Sparkling Lake, Wisconsin

  11. Control Methods • Chemical control methods • Seasonal Harvest • Combination fishing restriction and trapping • Don’t introduce in the first place

  12. Typical Traps

  13. Prevention • Education of the threats • Mandatory washing and cleaning of equipment. • Check points • Implementation of laws • - PA law makes its illegal for anglers to posses, aquarists to raise, and bait dealers or pet traders to sell O. rusticus.

  14. Identifying characteristics

  15. Don’t Use Me For Bait!

More Related