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<br />The calculated len!!ths of fish froJIII. OYllle ~ ItTh 1\t'J \ UHU_"'~' <br />the 3('tU3\ It'ngths of fis'h which llalllJearJ.~: ('Olllp!C't('O ll~,'ir ypar. 's ~;.(;,~th 'I,.' - <br />wheu taken. and a curye was drawll showlllg th'..' mean Slze at a:,!t's of from - . <br />one to five years. This Cllr\'{' is slim\'!1 in Figlll'(, ;)U. :\0 tisll oyer tiVI' y('ars'i:i <br />of a~'(' were tal;:eJl in Coyotl' ('r('('k. ~ <br /> <br />.,:.... <br />~ <br /> <br /> <br />300\ <br /> <br /> <br />\ <br />! <br /> <br />-\10 <br /> <br />250 <br />\ <br />\ <br />I <br />on \ <br />... I <br />cu ' <br />Q; 200, <br />E \ <br />.- \ <br />:::E <br />I <br />..c: <br />0.150 <br />c: <br />Q) <br />-.J <br /> <br />"0 <br />... <br />o <br />"0 <br />5 100 <br /> <br />- 10(' <br /> <br />-90 <br /> <br />(J) <br /> <br />.\ <br /> <br />2 3 <br />Age in Years <br /> <br />4 <br /> <br />FIGURE 50. Growth curve of Coyote Creek sQuavdish <br /> <br />In Fig:ure 51 are two cnnes showing the relatiw size and rate <br />(!rowth of fish from Coyote Creek and from Pittsburg. A logarit <br />seale is used in order to indicate the rate of increase in. ]enzth. On sli <br />a scale the rate of increase is indicated by the slope of the e.;]rve, aDd' <br />steeper the slope the greater the rate of increase. "-here the cnn'es <br />parallel it indicates the same rate of growth. <br />At the end of the first vear the Sacramento fish were nearly 10 <br />larger than those from Coy~te Creek. At the end of the seeond ;'ear th' <br />averaged nearly 30 rom. longer. At the end of the third, fourth, and <br />years the Sacramento fish were about 20 mm. longer than the CoY9 <br />fish, TbeSacramento fish bave a greater initial rate of growth, but' <br />two become about the same at the end of the third year. <br /> <br />.----..---------.--... <br /> <br />.;f <br /> <br />- 8.0 <br /> <br />J~ <br />.",'-t. <br />...~, <br />"f <br />~3 <br />~.~ <br /> <br />rt: <br />CDt.. <br />~. - <br />~'J~ .' <br />=r' . <br /> <br />I~,.. ...... <br />S-. <br />O' . <br />=r. <br />CD . <br />,CIl . <br /> <br />-7.0 <br /> <br />- 6.0 <br /> <br />-3.0 <br /> <br />- 2.0 - <br /> <br />- \.0 <br /> <br />5 <br /> <br />ovv <br /> <br /> <br />500 j----,-_ ._ <br /> <br />400 f----:- <br />~n_ <br /> <br />-o!= <br /> <br />h~ <br /> <br />170 <br />-- '.E== ==11~.0 <br />~13.0 <br /> <br />::-~".O <br />-.:.. 9.0 <br />80 <br />- 7.0 <br />.1 <br />'+ 6.0 61 <br />"I,i 5.0 ~ <br /> <br />Vl <br />~ <br />'" <br /> <br />- <br />300 =-- _ <br />~_. ::--: <br />=~~ <br />200 :.::_- <br /> <br />~- <br /> <br />-' -= <br /> <br />--;:. <br /> <br />= <br /> <br />. , <br />, <br />I <br /> <br />, , <br /> <br />I I <br />, <br />, i <br /> <br />, I <br /> <br />'" <br />E <br />'-= 10 <br />::: 9 <br />~ 8 <br />;: 7 <br />g' 60 --:----- -- <br />W ~-: --- <br />-1 50.:~ - <br />~ 40~ == <br />o <br />'0 <br />5 30C: <br /> <br />, <br /> <br />ii, :/ <br /> <br />o <br />o c -.- :.__ _ - <br />o - 'u., _. <br />o -- -; -.'.j'F~- <br /> <br />--- .~. <br /> <br />~ 4.0 ~ <br />~ <br />lQ <br />3.0 :; <br />I <br />~ 3' <br />n <br />:7 <br /><1l <br />U> <br /> <br />-~=C-: <br /> <br />- ~ <br /> <br />~ <br /> <br />_ '=0-'_ F=' _. <br /> <br />=~.~.-= <br /> <br />.=t <br /> <br />~20 <br />,,=~ - _:~ <br />=,= <br /> <br />(/) - <br /> <br />Coyote River Fish <br />:: <br />~. _..2ocromento River Fish <br />T ~- , ~.., -...... <br /> <br />20 <br /> <br />e-:--- <br /> <br /> , , <br /> : , , <br /> , i , I , <br />10 , , I I I <br /> I 2 3 <br /> <br />T <br />j I! I I <br />I I f I I I <br /> <br />: , <br /> <br />Ii <br /> <br />4 5 <br />Age in Years <br /> <br />7 <br /> <br />6 <br /> <br />8 <br /> <br />Fh;L-la.: ~ 1. <br /> <br />Growth cu:,'es of Coyote erE''''' squawftsh <br />_Quawftsh on a logarithmic sc';'le anll Sacramento Ri\"er <br /> <br />SUMMARY <br />'1'1 -. <br />.1" ~ucJ'amento sljnawfish is ' fi <br />~11l;;IJl:nJ draina;!e basin and se~'erai to.Jl ned. ~o. the Sacramento-San <br />11I11"dlll:; "mly.nLl alld milldle elevati Sll1~]] adJ?1I1JJlg stream systems. It <br />Jt.IIIH'IJlates 111 ::;pawnincr mi"'I"lf Oll str~a~Jl~ ~nd lakes. It frequently <br />tlll'IlII;.!"!] the sum'11er 'I'll'" , e c lOllS, reJlla~llIng In the spawnin'" stream' <br />. '. e ,ounrr comTlet . t] t f <- <br />"'"1111. 'alllladu]t' " 'f' t'e"l I rout. orfoocland"liyi.. <br />s.' S compete or space a d b bl . De <br />. Jtol\\lllll;r generallv takes lace I . n pro. a y prey on young trout. <br />I~;:;:" a I'e deposited ~n sto ,P, ( urlll.g .Apn] and l\Iay. The adhesive <br />Tl .' n- lles 111 areas WIth running water <br />H il<:-e of the squawfish can bIt' . <br />,\ II illdllllns or Veal' mark 1"~ f'or'l Ie. ( e'lIermlhned by a study of the scales <br />'j'j . . _ '" Ile( Ul.l arc . . <br />f' l(~ maXIIIlum acre of' , <br />,1\'., \""II'C Tl . e specnllens exammed from Coyote Creek <br />. . .,. le maXllllUlll a"'e f fi'h f ' .' was <br />Y";II'S. e 0 s rom the Sacramento River was nine <br /> <br />TIll' scale forms whe tl fi h ' <br />uf t Ii" st:aJe is ver" ra . d n ~e s is about 20 mm. in length. The O'rowth <br />/Iud 111(' fish do n'ot pI ~llrlhng the early part of the first veal' The"'scales <br />grow In t p , ' . . . <br />I:I't'atf'J" part of th fi t . same proportIOn at all tImes. Durin'" the <br />the fish, and duri:g ~e Jear tdhe scale~ grow proportionally faster than <br />Becon and third :rear the growth of the scales <br />