biostudies-literatureAshley EANIGMS NIH HHS45-55https://www.ebi.ac.uk/biostudies/studies/S-EPMC8963197biostudies-literatureUnknown77(1)Diamond-backed Terrapins inhabit coastal salt marshes along the eastern and Gulf coasts of North America. Terrapins are adapted to intermediate salinities yet frequently face saltwater-inundated marsh habitat exceeding 25 ppt (or grams/kilogram). We investigated the effect of salinity on the growth of hatchling terrapins and on their compensatory responses to salinity stress. We randomly assigned 30 terrapin hatchlings each to one of five salinity treatments (1, 5, 10, 20, or 35 ppt). Over 75 d, we regularly monitored behavior, appetite, and changes in growth; and calculated ratios of heterophils to lymphocytes (H:L ratio) to assess responses to prolonged salinity stress. Consistent with prior studies, chronic exposure to high salinity significantly reduced hatchling growth. Hatchlings in HerpetologicaEffects of Salinity on Hatchling Diamond-Backed Terrapin (<i>Malaclemys terrapin</i>) Growth, Behavior, and Stress Physiology.PMC8963197T32 GM136559Ashley EADavis AKTerrell VKHead LCarden CLake CMaerz JCChoe RfalseEffects of Salinity on Hatchling Diamond-Backed Terrapin (<i>Malaclemys terrapin</i>) Growth, Behavior, and Stress Physiology.Diamond-backed Terrapins inhabit coastal salt marshes along the eastern and Gulf coasts of North America. Terrapins are adapted to intermediate salinities yet frequently face saltwater-inundated marsh habitat exceeding 25 ppt (or grams/kilogram). We investigated the effect of salinity on the growth of hatchling terrapins and on their compensatory responses to salinity stress. We randomly assigned 30 terrapin hatchlings each to one of five salinity treatments (1, 5, 10, 20, or 35 ppt). Over 75 d, we regularly monitored behavior, appetite, and changes in growth; and calculated ratios of heterophils to lymphocytes (H:L ratio) to assess responses to prolonged salinity stress. Consistent with prior studies, chronic exposure to high salinity significantly reduced hatchling growth. Hatchlings in 2021-01-01T00:00:00Z2021 Mar2025-05-18T12:05:50.337Z2025-05-18T12:05:50.337ZS-EPMC89631973535609210.1655/herpetologica-d-20-00028.1