Re: Digest Number 65
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RE: Salinity Colleagues: Pardon my confusion as I cannot figure out who sent in the unpublished data on salt tolerance. Thank you, big time! I have discovered the same thing in my head-starting program in Maryland and have observed what may be some very evolved behavior in nest site selection and proximity to fresh water marshes. A local magazine recently published a story about my observations in this regard and as soon as I acquire a digitized version I shall pass this on. Also, please pardon my failure to respond in a timely fashion – I am currently tagging adult terrapins for a population estimate and have over 60 beauties waiting to be tagged, measured and released, Later mw —–Original Message—– From: diamondbackterrapins@egroups.com
Can you give us any generalized info. on the range of color patterns of the population you are tagging? Or pictures? Terrapin Station at USNA/GP wrote:
I shared the information I found from an unpublished paper. But let me stress the paper I was reading was a DRAFT from 1995 and it may be published now through USFWS. The author was Kathy Nemec if anyone is interested in looking this up. She did a nice job of reviewing all the literature (as of 1995) not only about salt tolerance but about habitat utilization, recruitment between populations, and even a lot on population status/accidental takes. My first thought after reading this is that terrapins do have quite a bit of physiological means of controlling salt intake, this is not as impressive as sea turtles, but anyway… The majority of the sodium intake by terrapins in seawater is not through the water but through the food they eat!! They can manage salt intake through seawater, but when they eat in seawater the food is obviously salty (crabs are conformers not regulators). My second thought is that it may be better for babies/juveniles to be in fresher water, but they still need some sort of sodium intake for proper growth and shell development. I think if I were to set up a system now with babies I would consider water with a salinity of 4-10 0/00 and feed the turtle some sort of salty food (anything from the sea/lower marsh area). I wish I could share the paper with you all, but I can’t afford to make copies and mail them to everyone. Someone should check to see if this was ever published, if it was published by USFWS then it should be available free of charge (our tax money at work!!!) Happy Holidays!! Phil Allman Environmental Specialist Collier County Natural Resources Naples, Florida 34112 —–Original Message—– From: Terrapin Station at USNA/GP [mailto:terrapin@…] Sent: Wednesday, December 13, 2000 9:12 AM To: diamondbackterrapins@egroups.com Subject: Re: [diamondbackterrapins] Digest Number 65 RE: Salinity Colleagues: Pardon my confusion as I cannot figure out who sent in the unpublished data on salt tolerance. Thank you, big time! I have discovered the same thing in my head-starting program in Maryland and have observed what may be some very evolved behavior in nest site selection and proximity to fresh water marshes. A local magazine recently published a story about my observations in this regard and as soon as I acquire a digitized version I shall pass this on. Also, please pardon my failure to respond in a timely fashion – I am currently tagging adult terrapins for a population estimate and have over 60 beauties waiting to be tagged, measured and released, Later mw —–Original Message—– From: diamondbackterrapins@egroups.com
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