Equal partnership: two trematode species, not one, manipulate the burrowing behaviour of the New Zealand cockle, Austrovenus stutchburyi.
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Citations
The ecological significance of manipulative parasites.
Importance of parasites and their life cycle characteristics in determining the structure of a large marine food web
Parasites boost biodiversity and change animal community structure by trait-mediated indirect effects
Climate change, parasitism and the structure of intertidal ecosystems.
Trematode parasites of Otago Harbour (New Zealand) soft‐sediment intertidal ecosystems: Life cycles, ecological roles and DNA barcodes
References
Parasitism: The Ecology and Evolution of Intimate Interactions
Parasites and the Behavior of Animals
Evolutionary Ecology of Parasites: From individuals to communities
Adaptive changes in the behaviour of parasitized animals : a critical review
Related Papers (5)
Manipulation of a mollusc by a trophically transmitted parasite: convergent evolution or phylogenetic inheritance?
Parasites boost biodiversity and change animal community structure by trait-mediated indirect effects
Parasitism, community structure and biodiversity in intertidal ecosystems.
Frequently Asked Questions (12)
Q2. How long can metacercariae survive inside whelks?
Metacercariae ingested by whelks as the latter feed on cockles can survive up to three days inside whelks before passing out in the faeces (Mcfarland et al., 2003).
Q3. How long did they stay in plastic containers?
They were returned to the laboratory and kept individually for several days in small plastic containers filled with seawater, under constant illumination and at room temperature.
Q4. What is the role of helminths in the evolution of parasites?
Helminth species known to be capable of manipulating the behaviour of their intermediate hosts regularly coexist with other helminth species, forming packets of infective worms acquired simultaneously by any predator ingesting the intermediate host (Bush et al., 1993).
Q5. What is the significance of the cockle?
For instance, predation by anemones has been identified as a significant source of mortality for cercariae leaving their snail host in search of cockles (Mouritsen & Poulin, 2003c).
Q6. How many metacercariae were dissected from the foot of 8 cockles?
Thirty randomlychosen metacercarial cysts were carefully dissected from the foot of 8 cockles (for a total of 240 metacercariae), and their diameter was measured under the microscope (30 £ magnification).
Q7. What size of cysts were found in the cockle?
Metacercariae with 31 collar spines, i.e. those of C. australis, had cysts ranging between 267 and 333mm in diameter (mean 285mm).
Q8. How many metacercariae were found in the foot of a cockle?
Based on mass (after weighing foot sections separately to the nearest 0.0001g), the relative sizes of the tip, middle and hind sections were 26.2%, 37.9% and 35.9% of the total foot mass, respectively.
Q9. What is the common species of echinostome in cockles?
echinostome infections are commonly found in the mud snail Zeacumantus subcarinatus (Batillariidae) (B.L. Fredensborg, personal communication), whereas the first intermediate host of C. australis, in which cercariae are produced prior to infecting cockles, is the whelk Cominella glandiformis (Buccinidae) (Allison, 1979).
Q10. What is the history of the parasitology literature?
The parasitology literature of the past 30 years contains numerous examples of intermediate hosts displaying altered behaviour following infection by larval helminth parasites, with the modified behaviour often facilitating the transmission of the parasites to their next host (see reviews in Combes, 1991, 2001; Poulin, 1995, 1998; Moore, 2002).
Q11. What is the likely explanation for the high number of metacercariae in the tip?
One possibility is that both echinostome species have evolved a strong preference for the tip of the foot, only settling elsewhere as a consequence of crowded conditions.
Q12. How many cercariae were shed by whelks?
Data were obtained for 50 cercariae shed by whelks (10 cercariae from each of 5 infected whelks), and 51 cercariae shed by mud snails (6–10 from each of 6 infected snails).