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d’Orbigny 1935
"On a global basis...the two great
destroyers of biodiversity are, first
habitat destruction and, second,
invasion by exotic species”
- E.O. Wilson
Invasive Ampullariidae
(Mollusca: Caenogastropoda)
Kenneth A. HayesHoward University, Department of Biology
Washington, DC
National Plant Diagnostic Network Malacology Workshop
UC Davis 16-18 June 2015
What are Apple Snails?
Freshwater snails in the family Ampullariidae
Afropomus SauleaLanistesPilaMarisaPomacea PomellaAsolene
117 23 12173 303
Felipponea
Berthold 1991; Bieler 1993;
Cowie & Thiengo 2003; Hayes et al. 2009, 2014
Invasion Biology• Introduced around the world
– Aquaculture and aquarium trade
– SE Asia, Spain, USA, Iran, Russia, Pacific
Islands, Africa, India
– Major pest of rice and other aquatic crops
– Major environmental pest
Disease Ecology and Public HealthAngiostrongylus cantonensis
Lv. et al. 2011
Photo: Camila Krug
Graeff-Teixeira et al 2009
Jaynee R. Kim, Kenneth A. Hayes, Norine W. Yeung and Robert H. Cowie
Norine W. Yeung, Kenneth A. Hayes, and Robert H. Cowie
A. cantonensis in rat brain
– Pila sp.
– Pila dolioides
– Pomacea sp.
– Pomacea canaliculata
– Pomacea lineata
– Pomacea cuprina
– Pomacea gigas
– Pomacea insularum
– Pomacea insularis
– Pomacea insularus
− Pomacea scalaris
− Pomacea bridgesii
− Pomacea diffusa
− Pomacea cuprina
− Pomacea haustrum
− Pomacea paludosa
− Ampullarius sp.
− Ampullarium canaliculata
− Ampullaria cuprina
− Ampullaria levior
− Ampullarium insularum
Invasive Apple Snails
Agricultural DamageNumber 1 Rice Pest in SE Asia Number 1 Taro Pest in Hawaii
Damage
• Alteration of ecosystems
– Near complete removal of aquatic vegetation
– Competition with native herbivores
– Consumption of native snails and invertebrates
• Trophic shifts
– Macrophyte dominated to phytoplankton dominated
• Declining biodiversity and ecosystem stability
Aditya & Raut 2002; Carlsson et al. 2004; Carlsson & Lacoursiere 2005; Wood et
al. 2005; Carlsson & Bronmark 2006
“The relationships of the numerous species described, remains,
however, in a state of hopeless confusion” Pain 1960
“The limits among species are exclusively based on personal
opinions that are seldom transmissible:
the species is in the eye of the expert” Cazzaniga 2002
Systematic Confusion
Phylogenetics
• 5 loci (2 mtDNA, 3 nDNA)
• >1500 snails• 51 New World species
• 13 Old World species
• >2500 Sequences
• Integrative taxonomy
– Molecules
– Morphology
– Ecology
– Biogeography
Hayes et al. 2009;
Hayes 2009
New World
Old World
Marisa cornuarietisAsolene spixiiPomacea diffusa
NOT bridgesii
Planorbella sp. Biompholaria sp.
Marisa cornuarietis
Pomacea canaliculata
Pomacea maculata
USA Rice Growing States
Figure 2. Present populations of the island apple snail, Pomacea insularum, and its occupiable
area.
Byers JE, McDowell WG, Dodd SR, Haynie RS, Pintor LM, et al. (2013) Climate and pH Predict the Potential Range of the Invasive
Apple Snail (Pomacea insularum) in the Southeastern United States. PLoS ONE 8(2): e56812. doi:10.1371/journal.pone.0056812
http://127.0.0.1:8081/plosone/article?id=info:doi/10.1371/journal.pone.0056812
Systematic Revision of Ampullariidae
Hayes et al. 2012
Pomacea maculata and P. canaliculata
≤ 2 mm ≥ 3 mm
L
Ct
Lung and Siphon
MarisaPomacea
Asolene
Gill
Lung
Hayes et al. 2012
ShortLong
Medium
Hayes et al. 2012
Hayes et al. 2012
P. canaliculataP. maculata
Reproductive Anatomy
Modified from Gamarra-Luques et al. 2006 and Ghesquiere, 2005
Reproductive Anatomy
P.
maculata
P.
canaliculata
Hayes et al. 2012
Reproductive Anatomy
S.A. Ghesquiere – applesnail.net Hayes et al. 2012
≤ 2 mm
Eggs
≥ 3 mm
Mean clutch size ~260 eggs Mean clutch size ~1600 eggs
P. canaliculataP. maculata
Hayes et al. 2012
Egg Morphology
Hayes et al. 2009, 2015
Oviposition Location
Copulatory apparatus
Penis & Sheath
Reproductive Anatomy
Hayes et al. 2009; Hayes 2009; Hayes et al. 2012
Gamarra-Luques et al. 2006
Ghesquiere
Pomacea canaliculata
Pomacea maculata
Rawlings, Hayes, Cowie & Collins, 2007
Cowie, Hayes, Tran & Levin, 2007.
Hayes, Joshi, Thiengo & Cowie, 2008
Tran, Hayes & Cowie, 2008. Malacologia
P. maculata
Molecular Systematics
In Reality
Hayes et al. In PrepPomacea paludosa
Silvana Thiengo
Aline Mattos
Sonia Barbosa dos Santos
Aline Schilithz
Monica Fernandez
Wellington Costa
Alfredo Castro-Vazquez
Ricardo San Martin
Fábio Faraco
Francisco Feitosa
Luiz Jorge Pinheiro
Jean-Pierre Pointier
Tim Rawlings
Tim Collins
Ravi Joshi
María Virginia De La Hoz
Francisco J. Borreo
André Favaretto Barbosa
Pablo Coelho
José & Suzana Almato
Maria E. Diupotex-Chong
Néstor Cazzaniga
Helena Fortunato
Dr. W. Lobato Paraense
Dr. Lygia Corrêa
Romi Burks
Roland Schultheiß
Christian Albrecht
Philippe Bouchet
John Slapcinsky
Acknowledgments
David Robinson
Suzete Gomes
Rob Cowie
Ellen Strong
Norine Yeung
Jaynee Kim
Gary Rosenberg
Bob Howells
Marty Meyer
Dick HoenischNational Plant Diagnostic Network
Smithsonian Tropical Research Institute
Thank You
Pomacea canaliculata