{"refrec":{"BRefID":34464,"RR":"<b>Thurman, C.L.</b> (2003). Osmoregulation in fiddler crabs (<i> Uca</i>) from temperate Atlantic and Gulf of Mexico coasts of North America. <i>Mar. Biol. (Berl.) 142</i>: 77-92. <a href=\"https://dx.doi.org/10.1007/s00227-002-0920-8\" target=\"_blank\">https://dx.doi.org/10.1007/s00227-002-0920-8</a>","BEntID":34464,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Mar. Biol. (Berl.) 142</i>: 77-92. <a href=\"https://dx.doi.org/10.1007/s00227-002-0920-8\" target=\"_blank\">https://dx.doi.org/10.1007/s00227-002-0920-8</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Thurman, C.L.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Thurman, C.L.","Englishabstract":"Fiddler crabs (Crustacea: Decapoda; genus <i>Uca</i>) were collected from 16 locations along the temperate Atlantic and Gulf of Mexico coasts of eastern North America for osmoregulation studies. Three species, <i>U. pugilator, U. pugnax </i> and <i>U. minax</i>, were taken from habitats between Cape Cod, MA, and St.Mary’ River, Nassau Co., GA Seven species, <i>U. panacea, U. speciosa, U. spinicarpa, U. longisignalis, U. rapax, U. pugilator</i> and <i>U. minax </i>, were collected in habitats between the Ochlochonee River, Liberty Co., and Thompson’s Bayou, Escambia Co., along the Gulf coast of northwest Florida. To examine differences in osmoregulatory capabilities among the species, specimens were placed in various concentrations of artificial seawater (0 -3450 mOsm) for 5 days. The oligohaline or “freshwater” species, <i>U. minax, U. spinicarpa</i> and <i>U. longisignalis</i>, possess the lowest average hemolymph osmolality. They are unable to control hemolymph osmolality above 2000 mOsm. On the other hand, the euryhaline species, <i>U. speciosa, U. panacea, U. pugilator</i> and <i>U. pugnax</i>, have much higher average hemolymph osmolality. They are able to withstand an osmotic challenge of 2200 mOsm or greater. Among the eight species, <i>U. panacea</i> and <i>U. pugilator</i> are able to osmoregulate across the broadest range of seawater concentrations (0 -2800 mOsm). After an examination of the osmoregulation in several populations of <i>U. minax, U. pugilator</i> and <i>U. pugnax</i>, physiological adaptation is apparent in the two former species, but not the latter. Experimental evidence for capacity adaptation was examined in the freshwater species, <i>U. minax</i>. If slowly adapted to hypertonic seawater (1800 mOsm) for 14 days, this species is able to withstand much higher osmotic pressures than unadapted crabs. Although hemolymph isosmotic concentration remains the same, the limits for regulation are extended to higher osmolality. Consequently, as a result of studying osmoregulation in several species of <i>Uca</i> captured at various locations across their geographic range in the temperate zone, a clearer view of water-balance physiology is available for the genus. The <i>Uca</i> spp. are not uniform in osmoregulatory abilities. There is considerable inter-and intra- specific physiological variation associated with the ecological distribution of each species, respectively.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Osmoregulation in fiddler crabs (<i> Uca</i>) from temperate Atlantic and Gulf of Mexico coasts of North America","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-14 01:31:06.077865","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2003,"MonPub":null,"DateUpdate":"2019-08-08","DateCreate":"2003-05-05","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000181017900009","VABBcode":null,"OpenAcc":0,"DOI":"10.1007/s00227-002-0920-8"},"refs":null,"anarec":{"AnaID":34464,"PubliDate":2003,"Pagination":"77-92","XtraPublOfAnaID":null,"ISBN":null,"Volume":"142","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43352,"SerRR":"Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin.  ISSN 0025-3162; e-ISSN 1432-1793","StandardTitleSer":"Marine Biology: International Journal on Life in Oceans and Coastal Waters","ISSN":"0025-3162","AbbrevSer":"Mar. Biol. 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