First culture experiences of haliotis coccinea canariensis in a biofilter system

JOllmaj al Sht'llfi_<h R l'uarch . Vol. 19. No. 1. ~93 - S "' 1. 2(00. ABSTRACTS OF PAPERS Pr ese llfed (l( fhe 4th I"t e mafiolla/ Aba/olle Symposillm Cape Town. So ulh Af rica FcbnJary. 2000 5-l0 AbMr(lr!.v. Fcbruary 2000 FIR ST CU tT U RE EXPERIE NC ES OF IIAUOTl S COCo CINE,\ CAN ARIE NS IS IN A IIIOFltTER SYSTEl\1. P. H. Toledo . R. Ibroun, H. Fcrn á ndcz P¡ lIad os , 1\1. IZ ( IUi e rdo , and J. I' e ña, In stiwto Canario de Ci encias Marinas (I CC M ). Ap. 56 35200. Teide. Las P a lm a~. Islas Ca narias. Spain. H {¡/imis ('occil/ea call1lrie/l,\ú is an en demir ~ub~~c ie s fr om the Canary Islands. lis highly appreeiated navour has led to it being overfished along the Canarian c oa sts, The pr ese nt ex~r i  mcnts wcrc aimcd to produce cu ltur es 01' H. CO,ciI/Cfl ({/Iwri('II .l'is in an in tegratcd biofiltcr sySlcm. Sixly abalone ~pccimcn~ of ¡IVerage ~hcll Icnglh 4.2 C1l1 were carcfu ll y colleclcd frorn rocky s ho r e~ by hand ¡ lIld scuba dil'ing. Aftcr bcing sexed and ll1:lrked. they were k ep t undcr nawral light eonditions in Ihree indoor cir - cular t :lnk~ of 2000 I and provided wilh eo n stan1 seawaler nl lX and aeralion. They werc fed with four ~pecie~ of algae: Uh'lI rígida. Gw/el oupia (I;cll%mll. Codi ul/I /a y/orii. and Cysloseiw Immilis. produeed in the biofilter sys lern of the aquaelllturc eXfX'rimental pl ant in the ICCM. Individual size (she ll lenglh :md widlh) and \\'eight we re reeorded on a monlhly ba si~ and ~ p awning was in· dueed in the late ~pring with U.V. ligh!. seawater . hydrogen peroxide and TRIS so llltion. Abalone grcw we ll wi th two of the se!ecled algal speeies. namcly UIl'll ri gida a nd GrlllelOlll'i(1 dicI/O/OIIIll. although Ihe foml er was be tl er ;:¡c ccptcd and more cfrícienl in prornoting growth. Induccd spawning was ~ucce~sfu l. and aftc,r t\IO rnonth~ of feeding wilh benthic dialoms. scttled jU\cnile~ slarted fecding on macroalgae. THt : DIG ESTIBILlTY OF RA\\' , AU TO C LAVED AND I' IIYT AS E TREATED Lt : c. u~ n : s IN {;RU : NUP '\11'\ · LON E. J1 A LlT OIS LAEVI GA T,\. M. E. Vand epe{'r. P. \\' . lIou c, K. J. ": 111 Ba rn en ·ld. and .l . N. Ua\ · enhand . SA R e,earch :Hld Dc\'clopment In'tilllte Aquatic Sdenee, Centre. PO Box 120. Hen!cy Bcn ch. SOluh AU~lralia. 5022. In lhi ~ 'llIdy we delcrmined Ih e apparenl dige~ti b ili l y of nutri· ents in field pcn~. faba bcans. }ellow lupin, and \L:te h in lh i.~ grcenlip abnlonc. 11 (/Iit)/i~ /o/'riglj/(¡. and a,sc,~d \lheTher alUOcla\lI1g or lhe addilion of ph)! :I'oC im pr olcd lhe dige-ribilily (lf nutrient~ in Ihe,e legumes. Fifteen isonilrogenolls dicb. comiSling of one of Ihre!! different trcatme nl' of lhe followmg legume~: ¡¡cid ~a~ (1'/'1/111 \'(//il'lIm): ye ll o\.l [¡Ipin, (LllfJlI1l1\ ' /lIIellt): f;,¡ba bcalh ( I' ino/u/nl) :uld le leh (Vicia ,{I//w/). werc fOfl11ulatcd. The three trcatmenl, 01 each legume \I 'ere r;lw. rall plu' Ihe en/) mc phyla'c. tJnd nUlocla\cd. Dc-f:llted ,oy nollr ,cr\c d ¡¡~ a cOl1lrol. Al! legum e, (lIho le ~eed) \.Ic re gr\lu nd in a hal11l11er milI ami included a, lhe ~()1e prolein ,ource of caeh dicl. Each dlCI lIa, fed lO fouT dI fferen¡ rcpl ie:lIc tanl ~ of 80-100 ju \ ell! le grcC ll I i P ab:tlone. l- / ll1i - 0//1 ' /(/e1l¡':1II(/ (~hcll Icnglh 40 -- 6() mm. 70 g IleI wClght). F ;lcce~ \.Ierc colleetcd cach d a) b) ,c ll lcmcnl and Ihe app:lrent dige-ti bi l- -llh Inlcmational Abalone Symposium. Cape T own. Soulh Afriea ily of g f OS~ energy. protcin. amillo acids and phosphorous in eaeh dict was ealeulalcd u si ng chro mic oxide as thc inen indicator (0.5 %). Wilh rc~ pe CI to N di gestibililY fOf the untrcated Ic gumes. lupin > soynour = bc:lI1s > peas = I'eteh, Gross energy and dry rnalter digestibi li lY had ~im ila f patleros. wi lh IlIpin = soyflollr > beans > peas = I'etch. In general. autoclal'ing had a negalive effeet on dige stibilil Y. significantly decreasing the digeslibilily of a ll ami no acids and prolein from all legumes. Gro ss energy digestibility de neased fO f bo lh soyllour and lupins. but inereascd for pcas and veteh ¡lfTe r a ul oc laving. The gros~ ener gy dige~tibilily of bcans wa~ unchangcd. Th e addition o( ph)'tasc significan lJ y increased lhe dige sTibility of phosphofOUS from the lupin diel o nl y (S-l-91%). Slrangcly. the digestibililY of phosphorous from pea diet actually deercased lI'ith the additioll ofphytase (94--87 'k). In addilionlo ils effeel on phosphorou~ dige stibility. incrcases in dry maller. nilrogen and Ih e dige slibility of so rne amino acids "'ere ob~rved ",ith the addilion of phytase. TI-IE EHE CT OF STARV ATION ON GRAZING RATE S O .. ' IlALlOTl S FU LGE NS POSTLARVAE . L. A. Vélez t :s pino , R. Se:m :y U('rnal. alld C. Anguiano Beltrán. Inslituto de Investigacione, üceanol ógica" Apanado P O~laJ 453. En_enada 22860. Baja California. ]I. ·léxico. Gmzing rates 01' l1 a/iotis /u/g eIl J postlarvae (30. -l5. and 60 day~ old) after differenl period:. of :.Ian'ation ( O. 1. 2. 3. and -l day .. ) werc cSlimated by the digital analysis of I'ideo-rccorded image:. of graled areas. Trials \I 'cre conducted in IOml pl aslic di~hc:. colo nized by the culturcd diatom Nm'icu/a il/cerw :lI slandard densil ie, (ca. 250-500 ec ll s/mm2 ). A ~ignifical1l increase in grazing rate ~ at long er slarl'ation pcriods \la s detected. H owcve r. f or -l5 and 60 day-old posllana e. thi ~ in crca,e occur fed moslly during Ihe fir..t 1\\'0 days of ,tarvation. The ma . ~inll!111 gra7ing rales fol' 30. -l 5. ami 60 day-old s tafled abalone :. 11 ere 3 861. 6986. and 10 6-l3 eel l, /po:.t I:lr\'alhour. rc_peel i \'el y. 11 hich are ~ i mi lar lO mtcs o b,efled in par¡tllcl lrial, al much hi ghcr biofilm dcnsities (ca. -l.ooo celh/mm 2 ). T E TR ¡ \I'LOII) IN IJ UC TIO N IN TH E P¡\ C IFI C AUALO NE IMU o n .') IJIS CUS IM NN M INO \\'ITlI 6·1)i\IAI' AND CH. G. Zhang , Z. Wan g. Y. C hang o J. Son g, J. Oing. Dalian Fi"hene~ Unil er'! t y. K ey L.1boratory uf j\ '1ariculwre Ecol ogy. M inhlry of Agrictllturc. Dalian. LN. 116023. PRC. S. lilao and X. ellO . H a,~i n S hciln,h Re:.earch L abora lory. Rutgers U ni ver,ity. 6959 l\ 1rll cr Alcnue. P on Norri,. NJ. ()1:!349. USA. Triploid <; hcllf i~ h are. lI~cful in :lqllaeulturc becauM: of Ihcir ~Ie rilu y. ,upcr i or grullth. 11l1prO\enlel1l meat qWllily ; :md w m e· lim e' iner e:l'oCd di,ca:.e rc<.i,tancc. The bc~t lIay to produce trip-