120(1) 34-:36. OQ(J6 TT.TE 1\AUTILUS Pab"e :34

Mytella charruana (: ): a new, invasive bivalve in Mosquito Lagoon, Florida

1 Michelle L. BoudrealLx Linda J. Walters2 Department of' Binlo�')'

Ulli,-ersit,·• of' Cent rnl Fkwicla !000 Central Floridfl HoniP\'1, otn ':1i l.cn m 2 [email protected]

lNTHODUCTlO! \'t'Hl'Zlwla to A rgf'nl'ina (Kct�n, I �)71; Carlton, J 992; ' Szefer et al., l\-J9H: Boehs et al., 200·J). The> charm mnssel Biological invasions an:' recognized'- as one of the most ' also occurs 011 tlte eastern Pacific Oceau fro111 Guaymas, .seliOliS problelliS confroutiug the integrity ur llati\'t' spe- Sonora , \lkxico to El Salvador and the Calapagos Islands cies and ecos\'s, te m s aronnd the world (Carlto11 and Gel- (Cardella:; and Aranda. 2000). lar. I 9!)3). Inva�iw spe-cies often hm·<� no natural C'IH'rni<�s Jlytclla clwrnt

2000). lts e�termu shell color mav• \'aJY* rrom li'gh t \_gref'n to black. bec:k. ln aquatic eco;,·ystf:'111S. ext n:'llle t'X· occurs the Asian ,green HIUSsel Perna oiridis ( Lillli the� I \-JH6-191:l7 arrival in northPrn Florida, "AI. ' especi

1.8

� 1 6 E u 1 4 - Q) N 1 2 (/) 1.0 Q) (/) (/) :::::l 08 E 06 c: ell Q) 04 2 02 00

Figure 2. i\-lt'atl le"gtJHslculdnrd crrur (<:111) qf .\/ttl ella char­ ru mto collected i11 i\ Io�q ui to Lagoon. F'lori cia.

population that is still tl'lit!:' smalL Althongh individnal� up to .J.-!em in length hal'l' het'u recorded in its native range. tl1e sizes of i\1. c!JntTIIOIIO Fouud dn1ing one )·ear in .\:Jo�t jiJ ito Lagoon \\·ere consistt-nth small. nmging

f'rom 0 . .5 -·1 . 7 c11t (Mean + S.E.: .t.:3 + 0.1 em). The mean lc11glh of' illlli,·idnals cullectt-d from' August :200-l­ Fc·hntary :?,()().') ll' ± 0.1 em, wberC"as the nwa11 Figul'€' l. ;\lytdlo clwrm(//11/ fn1111 i\losquitn Lago(ln, 'J()05 + Flmicla. left !top\ and right (bultoul) 1·akc�. ll.\IS.\'1 :3-10()1. length for the .' \ug•1st-Octoher collection \\'th 2.-1 c111. Sc;Lie har = I nn. J em . YVh('n compan ·d witl1 011e-way anal;·sis of ntri­ all(:e. the mean lvngth o[' Au� s '100-1--Ff:·bruatY � the �-n t � 200.5 = indiliduals ll'as sign. ilkantl.l' larger' (J\0!0\'i\: F 32 0.0001) 2). S1·�te111atic. Slll\'('\'S \l ('l'C l'Ond h1 August-OctohN ·i005 Wt'rE' ' I s ' ' o thrin:·. indu e ling• blaciPs a11cl base·� of tlw curd!!rassp ignifkanth.· lower tlt

    . hlcu:k IJHtngrove pnelllllatn­ imblidu ab. H f'cologic:al condition:, arc npti111al l'or con­ phore�. clusters of' m·�tt'I'S, am] disarticulated oyster tinued survival and (,Stablish nwnt or M. ('//(/ /'f'l/(1//(/. I I lis shells. For each colll'ctcd indi,·idllal. the following iJd�Jr- population l1as tl1e potential to greatly increasf' in nllm­ ' mation 11·a� recorded: CPS <:oordinntes. water telllpera- hers <111cl out-c:o•npete natil·e niUssds in the area. Adcli­ ) tional rcsl'arch on this species is II' imli1'idua. ls oJ' :\I rharrunnn II'Ne ronnwntal conditions nctl'SSetr) For cstahlislullellt, ami fo11n(l bct\\'cen .-\u�ust ·100-! and FehrmrY :wo.s and one i111pacts on biocUvt>rsil;. \'o11chcr �peci lilt'll:> arl' c �ur\'<:') ing. nu imli1iduals were Caines1ille. Florida (FLI'vil II :31261-i!::l, :372691) and Thf' found agaitl until A11�t1St :2S. "005. ll'hen JA lilt' indivi.dn­ 13aileY-i\1atthews Sl.ell i\Tuseun1. Sanihel. Florida ab 11ere collected. On our lasl ohstIYalinn ebb'. Octo her r BM s.vr :3..JOfi7).

    1. ·J()().5, an adclihoual -!0 li\·e inclil-i.duals II'Cre c·ollccted. :\IIJlclla cha rnra na \\'aS found attached to hoi h •nan­ ACK!\0\\ 'LEDGI\1E):'TS made dehli�. cspe<:ialh cinder blocks and P\ 'C. and tile­ sam<:' small crelicl' locations 1·ickd l11 CCF and ha1 e het>n fo1111d ami remo1·ed. iHrUl'ali ng an i m·asiw FI(Jiida Sl'a Cranl. \\·,. tli.tnk CaiiH\c·ral ?\atiu11al S••a- THE NAUTILUS, Vol. 120, lo. J

    shore For penmssJOn to conduct research within Park im·asive mussel (Mytilidae: Pema uit•idis) in Flolida. Jour­ nal of Shellhsh Research 22: 329. hounda1ies. \Ve thank P. Mikkelsen and an

    v , Mac eill. 1999. I Carlton, J. T. and J. B. Geller 1993. Ecologk:al nm letle: the Ludyans�iy. M. L., D. JlcDonalcl and D. m­ c 43: global transport of non-indigenous m;uine organisms. Sci­ pact of the zebra mussel. a bivalve invader. Bios ience 5.33-54-l. ence 26: 178-82. z n a :2000. C m M. . Diggins, T. P .. Wt>imcr. K. M. Stewart, H. E. Baier A. E. Huelas- l n u z . J. R. and F' . Paez-Osuna o parative ,\!eyer. R. F. Forsberg. and M.A. Goehle. 200-t Epiphytic bioavailabilit) or trace metals using three !Hter-feecler or­ rcfugium: arc two species of im·acling frc�hwater bivalves ganism in a subt ropical coastal environment. Environmen­ 107: 4:37-!4-J. portioning spatial rc·sources·,; Biological Invasions 6: 83- tal Pollution 88. Szefer. P., J. Geldo111. A. AlL F'. Paez-Osuna. A. Ruiz­ Ellstrand. 1. C. anu K. Sddert>nbeck. 2000. Hyl)]idhation as a Fermllldt>s, and S. G