next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects
Index of Subjects Aquatic "snails?" Do any species utilize anadromous fish species to take their larvae upstream, thus establishing and maintaining populations in headwater lakes and streams. This is quite common in the "snails'" cousins, the bivalve molluscs. I remember reading about a freshwater mussel species becoming extinct in N.B.'s Petitcodiac River, after the tidal dam/causeway in Moncton destroyed the salmon run there. I do wonder whether this species is back now that the dam is open again. I have never come across a good review of this topic. The larvae of relatively immobile invertebrates literally hitching rides on highly mobile searun fish to travel hundreds of miles upstream... Dusan S. ----- Original Message ----- From: <ulli@dunlin.ca> To: <naturens@chebucto.ns.ca> Sent: Wednesday, November 09, 2011 10:06 PM Subject: Re: [NatureNS] Trout and Snails > Another interesting aspect in "snail" biology is their role as > intermediate hosts for a wide > variety of parasites of aquatic and terrestrial environments. > Parasitology textbooks will reveal > the often amazing life cycles of those critters that often alter the > behavior of their current host > to promote the next developmental step, i.e. next host organism. Wouldn't > surprise me to find > out that in Spring and Fall some push for the step up in the next host > (fish?). > > Cheers > > Ulli > > > >
next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects