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~a,,i fj_T--'_ `~ «-~ ~ ~ ~.~ ;~ - - r `_ "". itb~. `'etc=. ~. ~a _ • ~ ~ . 67 HIJICS BOLLHEA.D {AJneiurus mela8 Ra.fi.aesqua) '~ Black bullheads first vane reported ca ht from ' the early history of the lake, and a ~sPac~A wasgrecordedLoanc Ahead during. 1937, ~~~, 19~), as caught near Boulder Beach. Several ind.ivid of rite seised about the month of the Noapa ' (I~iuddy) River d ua1.e ~ 1.92. Also upon recession of share-lines after high vaurtinrg ondf.tions a ember of specimens Were towed isolated in pools left by the race ' Ihl.s too xa.s in the upper Overton Arm sector of the lake. ding fig' Pere coIIIIIIOn],y found in the Moapa {?;eddy) River Burin t Black bui.~,BB,da . Y g his study, • The black bullhead was found to b e of no si = fishers! cif tale Mead during this study. gaificance to the sport- - p~S.RVATIONS OF NON CAME FISB .. ~ , - " _ - .~ ~ HLB~BACx SUCKE$ { auchan t - _ • _ _. ~_ exams Abbott) _ ~ . ~-~"The h~pback sucker, is considered native to the Colorado River ~ (La Rivers do 15release, 1952 ), and vas comcaonly found alon the st riv8r~_xhich-later became a part of Lake Mead g retch oft (local report), The popula- • tion of humpback suckers is Lake mead d Lo be=~ui_te abundant - _ ~~ t~ plod of this study appeared - pack suckers Were Pound Widespread-over the.]ske, Possib~,y the largest ~aacentrations Were seen about t he vicinity_ of river mouths. -- ., spaxning~ seasons; a very eatensiv~e shoreward- movement wa.s eahj,bited rtuch tides hundreds of adult suckers were observed about gravel shore at ~ malty sections of the lake, rovement at other times of the vet be more universal, and these fish were seen in o n y~ appeared to astiall as about the chorea. ~ ~ Pe~3ic Parts of the lake _ _ the food most cornr~onl3- found ~ sucker stomachs. Other, lesa:important sources of food were plankton, insects and decaying i orga.~ic matter, the let of~.arch and ,°f s_nawnii~=activity of suckers in - l~th of Apra],.. 1'he eater temperatureseat~thisatime o fen . ~~ ~~ ~oF to 65°g. The areas of spa about gravel shores. Depth of the s a .-~~ activity seed widespread 2 feet to belosi 15 feet. ether tj'~npre g sites extended frog less than suckers did not a~rear 4uiring the presence of gravel, the r °o nest was partict:lar about the generals :~ used. Nests when constructed, consisted me egg area, and often depressions in the gzavelsaept clean of siYt. 1,Y of very shal],ow ,~~ ~, Z'he actions of s wnin ~~ s i nu~ber of male suckers the g suckers were most iuterestiag to observe. A - ta coIIy'erge woos a ri ~ nunber Ong fro.•n two to ten or more, Were se?n i° u,DOn her sidss, Pe fe~,a].e, They ca~npletely surrounded her, teen closed pressing against one , another and the fema•1et?~~d lostlin the maze seen reT•a1e as .its nucle~.is, sometimes a this foz-.:.anon, vith the ~' sePk~.a pro lowly Wou_~d its Way along the shore as i.P per site tq spa:,•n, ether ti.c~es the formation hovered over a