In this case, the tunnels that they put under roads back east for amphibians to migrate to breeding ponds fits the mold.
On Thu, July 19, 2007 7:59 am, Ted Castro-Santos wrote: > Arguably, the entire field of diadromous fish passage could be considered > an > example of assisted migration. Fishways are structures designed to assist > migration; sometimes this amounts to mechanical transport, including > trapping animals and transporting them above or below dams. This is a > controversial method, but it can also be considered part of a continuum > that > includes technical fishways, even the new 'nature-like' designs (which are > supposed to simulate natural rivers). > > In truth, none of these fish passage structures can be considered > natural...Jim's point about the evolutionary context is a good one which > is > generally ignored in fishway design. Still, the need for assisted > migration > is clear and work continues on improving their functionality. To be > clear: > most fishways work poorly except for a limited number of species, and > there > is ample room for skepticism along the lines of Jim's remarks. Anyone > advocating assisted migration as a mitigation measure would do well to > consider the history of fish passage to gain some perspective. > > Ted > > --------------------------------------------------------------------------------------------------------- > Theodore Castro-Santos, Ph.D. > Ecologist > S.O. Conte Anadromous Fish Research Center, USGS-BRD > P.O. Box 796, One Migratory Way > Turners Falls, MA 01376 > [EMAIL PROTECTED] > Ph: (413)863-3838 > FAX: (413)863-9810 > > > > > > > > ----- Original Message ----- > From: "James J. Roper" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Wednesday, July 18, 2007 9:06 PM > Subject: Re: assisted migration > > >> Interesting concept - if you take my sarcasm. Let's imagine that >> migration >> took eons to evolve - do we have such hubris that we think we can >> predict >> evolution? With global warming, will animals need to migrate anymore, >> or >> will migration be even more important? And, if we translocated some >> animals, are they going to know that the idea was for them to migrate? >> Are >> we going to net populations of birds, turtles and wildebeest and move >> them >> to another place, hoping that they will figure it out? >> >> But, that is just my humble opinion.... >> >> Cheers, >> >> Jim >> >> On 7/18/07, David Inouye <[EMAIL PROTECTED]> wrote: >>> >>> John Nielsen, a Correspondent on the Science Desk at NPR News in >>> Washington DC is working on a story about "assisted migration" as it >>> relates to global climate change. "I have heard that while there are no >>> "official" translocations taking place at the moment, there's a lively >>> scientific debate going on about whether there will or should be." >>> >>> "I'd like to hear what the folks who subscribe to the ECOLOG listserve >>> think of "assisted migration."" >>> >> >> >> >> --=20 >> -- >> James J. Roper, Ph.D. >> Ecologia e Din=E2micas Populacionais >> de Vertebrados Terrestres >> ------------------------------ >> >> Caixa Postal 19034 >> 81531-990 Curitiba, Paran=E1, Brasil >> ------------------------------ >> >> E-mail: [EMAIL PROTECTED] >> Telefone: 55 41 33857249 >> Mobile: 55 41 99870543 >> ------------------------------ >> >> Ecologia e Conserva=E7=E3o na UFPR <http://www.bio.ufpr.br/ecologia/> >> Econci=EAncia - Consultoria e Tradu=E7=F5es >> <http://jjroper.googlespages.co= >> m> >> > Malcolm L. McCallum Assistant Professor of Biology Editor Herpetological Conservationa and Biology [EMAIL PROTECTED] [EMAIL PROTECTED]
