Today 25-01-2018 we documented more than a lakhs no of Faunus ater (Linnaeus, 1758) were seen in small estuary. Watch this link https://www.youtube.com/watch?v=p7BA1OvrN-k&feature=share .
This species are any indicator of usual.
Similar documentation was done by our team at Aadbandhar in Maharashtra a couple of years ago.
Similar documentation was done by our team at Aadbandhar in Maharashtra a couple of years ago.
Amazing video, I have never seen such a dense congregation of gastropods.
Any species can be indicator if their has unexpected population bloom. Depends on your findings why such phenomena happens. Of course, some criteria also need to considered.
Very impressive. Do you have any idea why they congregate like this at this specific site ? Is it like a mating spot ? Do they spawn there ? Do they feed there ? Do you have any evidence of mortality on the site (% of living individuals compared to dead or empty shell)? Before considering any kind of indicator you should try to understand why you observe this massive amount of that specific species, especially if the species has a particular status on the IUCN red list.
Hello Ravinesh,
I have no answer but it is an amazing video and you must continue in studying this species.
Regards,
Wafaa
Hi Ravinesh,
I think you should try to find out how often does this happen and which anthropogenic disturbances may be close to this site. However, I coincide with Mario that you should first ask you such questions related to potential natural causes; it seems to be associated with natural processes more than with human ones.
Regards
María
Dear Deepak samuel,
Mean this much of dense population of same species?
Regards
Ravinesh
Dear Mario Lepage,
We are regularly visit this area. But this is first time seen this much of population. All the animals are live. Need to check.
Regards
Ravinesh
Dear Ravinesh, its good if you already monitor this area regularly. Do you also monitor physics-chemical parameters like T°, DO, Conductivity ? Did you noticed any change in these parameters ? It would be nice to be able to identify abiotic parameters that could favour this species in that site. Maybe some high congregation were already observed somewhere and reported with abiotic parameters. That would help giving hypothesis on why you see that crowd in your area. Good luck
Dear Mario Lepage and María Victoria Laitano,
Yes ill check the physicochemical properties and anthropogenic disturbances may be close to this site.
Regards
Ravinesh
Dear Ravinesh,
yes! the congregating behaviour is amazing and you can read our accepted paper in reserachgate where, details on numbers in the studied area is documented. In southeast Asia, similar reports have been documented also. They seem to feed on decomposing organic matter. They have been also documented in the freshwater reservoirs of India. Very interesting indeed!
regards
Deepak
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