7006

• UCREFRP Catalog Number: 7006
• Author: Gustafson, E.
• Title: Early Development, Adult Sexual Dimorphism, and Fecundity of the Razorback Sucker,
• USFW Year: 1975
• Copyright Material: NO

, ,

, .

1)]:'U,'..:1 pigl[leri.(. g.L'dLl"..A.ll;s l'il.:i.. i..Ile <-;;jes alillOs::' co,nplete:"J.
illclarlOp:'lO.l'es hall e Uu t 'yet, a.Pi--Cc".L~J.' e1 :3ci;ili-r~.

Stdb8 ~~: ~iddle Frol~rvae: day 9;

2.::.8 hr;

9.0 mm.

'l'il0 j,'lAciL,I(;{.l(; OIC{18 gas .....:c-...J.'-l.el. is eviJE:lJ.;;. 'l'i"H:; lower j&vi

.I.'8i;A.ci1c8 ~he ant.erior bOl'der of ::"h~ eye:

jaw S [f,O C i 1 e i me ut 1'1 rou.c.deJ

aid ter;ainal. 'lilt gill covel'S (Jd,ve oVE::rgrown ~he ant.erlOl'-I1l0st gills.
The peccoral fins <H'e a::";Ju\:; 0.5 :;:;1ill long: 1l.L1S ili.ot.ile. P.!'octocleu.~ is
still closed. 'llh\;; yol:.t is very much I'eJ.uced.

Eje pigmentation is now complete:

pigJij,en~ !1aS t.urned black

H1L.i1L.l Lile 8;y-es.

B.i'O"'i~, sLellat.e melanu})llOI'eS are appeal'tng Oi'. the

(;C t.od.eL'~, overly 1ng the mid 'uraiu ci.ad hiddbraL1 regions, and on the
fciileu J.v.L'::::;::tl 1-l6,~,8nt lir.l.8, f.6i.ll'cd. Veil;';l'O ,vL;cer.;..l plgme.llt lLie (up-
peL' e~gt;; of C..0 bo,iy c~,v i Lj J ;:"~:'w. tile U~'~f-'d.ired mid-verlcral pig1~elJ.t

lL.1C: (aloq" t;-le i.;~llj 11J. ;:'ne ~..c\AlJ.~\.. reI::,1011).

i\lo illelall0phol.'es have been

eXf;r'6ssed. Oll ~~h.~ 1Jai.ced lat~ral plgill'::L1C line (~ihi.;h is contl.i:lUOUS vii th
the rlorizoL1cal lilJu.::iepti.A.I:.i).
'lht.;; larvae ar(: SWLrulii!lg tv tIll'; SUl'i'ace iLL order to feed on ground

aq,llariuhl .i:'lbh food. ('ieI.:c<:ilr.in).
120 be~~s per mln.

Ld..cval ileal'\:. ra.'ce while resti.c..g is

S~ag~ )2: Lac~ Prolarva~:

d.d.J 10i

,.... "''''' ,
'::'0.) nri

:1 . 0 W;Ll.

( Fig. '1).

'l'he assimllai.:;ioll of Jol'n. iJi;;.S proceeded so far that the the liver
nei-oj reac.hes Lh.:: mll-vc.Lltr'cl.1 1i1'.1e. '1'l1e pectoral fi!1s have illcreased
in lerlg IIh to a. S l'ilii,: no trace 01' fin ray s. Fin rays not ,y'et present
ill the t,;d.udal fill. rne.Li.or.:.t.ne.
fie>;ll':edt&tiol1 in~J.'..:;.,~::.iq~ 0.(.1. tne uorsd.l, veni.,ro-vi sceral 3..cll !,.id-
veat.ral aspects. I'lelafiophores nm; appearing on t.he lateral pigment
lL.lc, op~rcula:r:' gill flap aDd ac the base of the pectoral fin.

:'oSC~&l'v:..tl De'Jelop,ilE::dt:

,:>t;_lt,88 JJ & J4: l~ssiJ.J.'lilal;.io!l or Yolk: d..ay_12; J11 hr; 10.0 fillii.
'1'111:: ~SSil.iila~ioll of yolle is dGCOlllplisilOd. The gill flaps cover
-. c.i.ll;:;. O~oli('(.~s j'l:~V~ appecil'cJ in tLe iiuJ.ito,cj v8ssicles. .1-eCCor-

"-'P"--~~~:~"":~"""'i'";"< ,- .-', -_ocr"~

~