International Journal of Zoological Research1811-97781811-9786Academic Journals Inc.10.3923/ijzr.2006.91.99 Loxothylacus texanus (Cirripedia-Rhizocephala) Under Laboratory Conditions in México]]>LopezH. Vazquez-NogueraF. Alvarez-LopezJ. Franco-1200621Crabs with mature parasites were put on individual aquariums of 20 L of capacity and with an initial salinity of 10‰. Salinity was gradually increased 1‰ until it reached a point in which parasites expeled their eggs or larvae. Larvae at different developmental stages obtained from each sample were preserved in 70 and ethanol to be studied afterwards. From 20 crabs employed, only 14 of them produced eggs and other 6 died after a few days at the aquariums. The mature externas expelled from 8000 to 160000 clustered eggs. After 24 h from the beginning of cellular division, larvae hatch. This larvae are called nauplius 1. This stage lasted 24 h, after which all larvae entered an excitation period, where they rapidly moved, to then pass a new molt process resulting in a new larval stage, nauplius 2. Elevating salinity a unity, externas started to expel eggs, nauplis larvae 1 hatched from them, but they only survived less than 24 h. As salinity increased, nauplius larvae lived longer, even to realized a molt. At a 15‰ salinity, larvae reached cypris stage with no problem, but with a salinity higher than 25‰, larvae died after a few hours of hatching. We can conclude that: the rhizocephalan Loxothylacus texanus has two nauplius stages, the nauplius and cypris larvae presented similar morphological characteristics to related species of rhizocephalans and a salinity interval from 15 to 20‰ report the same result.]]>Adkins, G.,1972Loxothylacus texanus Boschma) of blue crabs (Callinectes sapidus Rathbun) in Louisiana estuaries.]]>21213Alvarez, F.,1993Loxothylacus panopaei (Cirripedia: Rhizocephala) and three of its crab host species (Brachyura: Xanthidae) along the East Coast of North America.]]>1993Alvarez, F. and J. Calderon,1996Loxothylacus texanus (cirripedia rhizocephala) parasitizing crabs of the genus Callinectes in the southwestern gulf of mexico.]]>9205210Alvarez, F., A. Gracia, R. Robles and J. Calderon,1999Callinectes rathbunae and Callinectes sapidus by the rhizocephalan barnacle Loxothylacus texanus in alvarado lagoon veracruz mexico.]]>111521Andersen, M.L., M. Bohn, J.T. Hoeg and P.G. Jensen,1990Ptychascus barnwelli new species and P. glaber (cirripedia rhizocephala) parasites on semiterrestrial crabs.]]>102028Christmas, J.Y.,1969Loxothylacus texanus boschma in the blue crab (Callinectes sapidus).]]>1969pp: 272275Daugherty, F.M.,195247784Dura, M.F.R.,1985pp: 63-65pp: 63-65Hoeg, J.T.,1984Sacculina carcini thompson (crustacea cirripedia rhizocephala).]]>76145156Hoeg, J.T.,19873174763Hoeg, J.T.,19911991pp: 208-227pp: 208-227Hoeg, J.T.,19921992pp: 313-345pp: 313-345Hochberg, R.J., T.M. Bert, P. Steele and S.D. Brown,1992Loxothylacus texanus on Callinectes sapidus aspects of population biology and effects on host morphology.]]>50117132Hoeg, J.T. and J. Lutzen,1995Cirripedia rhizocephala.]]>33427485Hoeg, J.T. and V.A. Rybakov,1995Arcturosaccus kussakini (Rhizocephala) and the homology of setae on the fourth antennular segment in rhizocephalan and thoracican cyprids.]]>234241251Chavez, E.L., F. Alvarez and C. Rosas,1996Loxothylacus texanus (cirripedia rhizocephala) parasitizing the blue crab Callinectes sapidus in tamiahua lagoon mexico.]]>16105110Loran, R.M., A.J. Valdez and F. Escudero,1993Callinectes sp. in alvarado lagoons veracruz.]]>101532Lutzen, J.,1984Sacculina carcini thompson (cirripedia rhizocephala) in the isefjord Denmark.]]>6991106Lutzen, J.,19851699112Brien, J.O. and P.V. Wyk,19843391398Park, J.,1969321220Ragan, J.G. and B.A. Matherne,1974Loxothylacus texanus.]]>1974pp: 185203Reisser, C.E. and Jr.R.B. Forward,1991Loxothylacus panopaei and its crab host Rhithropanopeus harrisii.]]>14102106Ritchie, L.E. and J.T. Hoeg,1981Lernaeodiscus porcellanae (cirripedia rhizocephala) and co evolution with its porcellanid host.]]>1334347Walker, G.,1985Sacculina carcini thompson (crustacea cirripedia rhizocephala).]]>93131145Walker, G.,1988Sacculina carcini (crustacea cirripedia rhizocephala).]]>68377390Wardle, W.J. and A.J. Tirpak,1991Loxothylacus texanus (rhizocephala) in blue crabs in galveston bay texas with special reference to size and coloration of the parasites external reproductive structures.]]>11553560Walker, G., A.S. Clare, D. Rittschof and D. Mensching,1992Loxothylacus panopaei (gissler) a sacculinid parasite of the mud crab Rhithropanopeus harrisii (gould) a laboratory study.]]>157181193Walker, G. and A.S. Clare,1994Loxothylacus panopaei larvae (crustacea cirripedia rhizocephala).]]>17276282Walker, G. and J.G. Lester,1998Heterosaccus lunatus (cirripedia rhizocephala).]]>18650655Willuams, A.B.,1984Rev. Sub Edn.,Yanagimachi, R.,1961Peltogasterella.]]>120272283