1 3 R O S'I'IIDY Tn PETF:TIMTNE TlIF, BUFGT SWIMMING SPEED OF SPAWNING-PUN SEA LAMPREYS (PETROMYZC*I MAR1NIJ.S) by L e e H . Hanson ~ntroduction Sea lamprey control i n the Great Lnkes has been h i g h l y s u c c e ~ s f u l . The p e r i o d i c treatment of sea lamprey producing s t r e a m with s e l e c t i v e toxicants (Applegate et a l . 1961; H o w e l l e t a l . 19647 Manion 1969) has reduced the number of lanpreys by approximately 90%. Natural o r man-made b a r r i e r s prevent spawning-run lanpreys from entering c e r t a i n s t r e a m , o r portions thereof, and thus reduce the number9 of streams t h a t have t o be treated. The Great Lakes Fishery Commission (GLFC) has, therefore, endorsed the i n s t a l l a t i o n of h a r r i e r s a5 p a r t of an integrated l w r e y control program, and an assessment o f the environmental impact of a barrier-dam program i s being made. I f the program i s a ~ p r o v e d ,barriers w i l l be constructed on many sea lamprey producinq streams t r i b u t a w to t h e Great Lakes. Although t h e precise desiqn of these harriers has y e t to he determined, most will be low-head dm3 constructed of concrete or metal. General design c r i t e r i a are available f o r lm-head b a r r i e r dams t h a t w i l l prevent the upstream movement of sea lampreys. According t o S t a u f f e r (1964), sea lampreys were able t o surmount a dam (with a curved o r s t r a i g h t lip) when n head o f 20 inches o r l e s s was maintained, but were unable to pass over the dam when t h e head w a s increased t o 26 i n c h e s . More recently, W. D. Youngs has shown that under c e r t a i n conditions a drop of 1 2 inches (weir ' c r e s t to pool aurface) c o n s t i t u t e s an e f f e c t i v e h a r r i e r ( H u m and Younqs 1980) . Although low-head dam; con formirrq t o thc!w c r i t o r i a can b c e f f e c t i v e b a r r i e r s t o sea l a m p r e y s d u r i n g p e r i o d s of low o r normal stream flow, they may p e r m i t lamprey passage i f the head i s reduced d u r i n g p e r i o d s of h i g h stream flow. Because high stream flows are common i n the spring during the s p m n i n q m i q r a t i o n o f t h e lamprey, c o n s i d e r a t i o n i s b e i n g given by t h e GLFC t o the d e s i g n o f low-head h a r r i e r dams that w o u l d maintain t h e n e c e s s a r y head d u r i n g lw and normal c o n d i t i o n s of s t r e a m flow, and t h a t would a l s o c r e a t e a v e l o c i t y b a r r i e r ta t h e upstream movement of spawning-run lampreys when high stream f l w and f l o o d i n g r e d u c e t h e head. The development of r e l i a b l e e n g i n e e r i n g d e s i g n c r i t e r i a f o r v e l o c i t y barriers t o spawning-run s e a lampreys i s d i f f i c u l t because f e w o b s e r v a t i o n s are available o n their burst swimming speed. Davis and S h e r a (1971) observed m i g r a t i n g lampreys a t Denny's Dam on t h e Saugeen R i v e r and found sea lamareys mu18 not move upstream p a s t the dam when t h e w a t e r v e l o c i t y exceeded 12.3 f t / s (375 c m / s ) a t 75.5 OF (24.2 "C) . Experiments at t h e Great Lakes Fishery Laboratory ( B e r g s t e d t et a l . 1977) indicated t h a t the burst swimmina s p e e d of sea lampreys appears t o l i e within t h e range of 150-170 cm/s (4.9-5.6 f t / s ) a t 6 or 10 OC. T h e i r r e p o r t s t a t e s , however, t h a t the swimming danker used ( a 16-cm d i a m e t e r t u n n e l r e s p i r o m a t e r ) may have restricted t h e swinunins movements o f the Lampreys. Hanson (1978) designed and m n s t r u c t e d a t e s t a p p a r a t u s t o determine the b u r s t s w i m i n g speed of lampreys i n a flume 30.5 cm wide. Tkelve tests were conducted d u r i n g J u n e 1978 a t w a t e r % t e m p e r a t u r e s r a n g i n g from 1 6 . 5 t o 25.0 13.6 ft/s. OC and a t w a t e r v e l o c i t i e s o f 4 . 5 t o The study demonstrated t h a t spawning-run s e a lampreys have a b u r s t swimming s p e e a o f o v e r 1 3 f t / s . This s t u d y d i d n o t d e t e r m i n e the duration o f e a & swimming e f f o r t or t h e distance covered during each attempt by each animal. I n order t o determine t h e d u r a t i o n nf and d i s t a n c e swum during each swimming e f f o r t by i n d i v i d u a l lampreys, 19 tests were conducted i n 1980. Materials and Methods T e s t Apparatus A flw-through t e s t a p p a r a t u s , c o n s i s t i n g of a head box (300-gal metal t a n k ) , f l u m e (10 x 1 x 1 E t ) , and f o o t box ( 4 x 4 x 3 f t ) , was c o n s t r u c t e d and placed i n t o operation at t h e lamprey weir site on the Ocqueoc River, Presque Isle County* Midigan ( F i g . 1 ) . River water was pumped t h r o u g h an e-inch diameter pipe i n t o t h e head box using a Model 55-B, Goman ~ u p p l / i r r i g a t i o n pump pcwsred by a Cumnins V-6 diesel engine ( ~ i g .2 ) . Water left the head box and e n t e r e d the flume through an opening 6 i n c h e s high and 1 2 inches wide. A f u n n e l made of 1/2-inch harcfware cloth, with an apening 4 inches high and 6 inches wide, was placed over the opening i n o r d e r t o hinder the l a m p r e y s that e n t e r e d the head box from going back into t h e f l u m e . Water v e l o c i t y i n the flume w a s c o n t r o l l e d by i n c r e a s i n g o r decreasing t h e velocity head i n the head box by changing t h e speed of t h e pump. The flume, made of 3/4-inch the head box and foot box. 6 inches. opening. plywood, wag a t t a c h e d t o the openings i n Water depth i n t h e f l u m e ranged between 5 and Water f l w e d from the f l u m e i n t o the f o o t box through a 1 - f t square Water depth in t h e foot box. was 2 1/2 f t . A screen, made of 1/4-inch hardware cloth, extended all the way t o the bottom on one s i d e of t h e foot box. ~ . Water passed through the s c r e e n and o u t the o v e r f l m , and was - . - J l Mention of a t r a d e name does n o t cxlnstitute recommendation o r endorsamentby the U.S. Government. -. carried back to the river throuqh wnodcn t r o u q h s . ~ e s t i n gP r o c e d u r e Each of the 19 t e s t s w a s started between 1600 and 1700 and t e r m i n a t e d a t 2400 h. A f t e r the d e s i r e d v e l o c i t y was e s t a b l i s h e d i n t h e flume, lampreys t h a t had been c a ~ t u r e di n t h e Ocqueoc R i v e r w e i r , o r i n traps f i s h e d i n t h e Cheboygan R i v e r , were removed from a 1Svehox and p l a c e d i n the f o o t h x . The numher t e s t e d depended an how m m v were a v a i l a b l e . Some were used i n as many as s i x t e s t s i n o r d e r t o g i v e us s u f f i c i e n t numbers t o t e s t . All lampreys wexe s e x e d , weighed t o the n e a r e s t nrm, and measured t o the nearest nun . (Table 1) When a lamprey e n t e r e d the flume, a n e t was placed o v e r the opening into the foot box t a p r e v e n t o t h e r lampreys from e n t e r i n g the flume and t o capture t h e t e s t lamprey i f i t failed i n its attempt t o s w i m the flume. The t i m e the lamprey entered t h e flume, t h e d u r a t i o n of e a c h s w i d n q e f f o r t , t h e distance swum d u r i n g each swirming e f f o r t , and the t i m e spent attached to the s i d e o r bottom of the flume beween swimming e f f o r t s was r e c o r d e d . Lampreys t h a t swam t h e flume o r f a i l e d and were c a o t u r e d i n the n e t a t t h e downstream end o f the f l u m e were removed, weiqhed, measured, and s e x e d (Table 2 ) . Lanpreys a t t a c h e d to t h e s i d e s or bottom of the flume hetween t h e 9- a n d 1 0 - f t i n t e r v a l s were c o n s i d e r e d t o have swum t h e f l u m e . Those that t r i e d t o s w i m t h e flume ( w i t h o u t success) for one hour were removed and c o n s i d e r e d t o have f a i l e d . A f t e r dark, o b s e r v a t i o n s were made w i t h the a i d of h l a c k l i g h t s suspended above t h e flume. Measurements of t h e w a t e r v e l o c i t y i n t h e flume were t a k e n w i t h a c u r r e n t meter (Price Type \ AA) a t 3- and 7 - f t i n t e r v a l s ( F i g . 3) . Measurements were made a t l e a s t every hour i n order t o detect any changes i n v e l o c i t v . The height of the head i n the head box and the s p e e d of the diesel e n q i n e ( a s indicated a n a n rpm qauge) were checked at least e v a r y 1 5 min during t h e t e s t s , s i n c e any changes i n these readings i n d i c a t e d t h a t a change i n the water velocity i n the flume had occurred. Results The swimminq a b i l i t i e s of the t e s t animals a t various water v e l o c i t i e s and tsmperatures are summaxized i n Table 3. a water velocity of 5 f t / s . Three t e s t s wexe conducted a t Only one lamprey attempted t o s w i m the flume and i t swam the e n t i r e length of the flume i n one attempt. No other t e s t s were conducted at this velocity a f t e r I had observed lampreys swimming the flume in one attempt a t 9 f t / s . Six tats were conducted a t water v e l o c i t i e s of 9 f t / s . O f the 5 3 lampreys t h a t attenpted t o s w i m the f l u m e a t this v e l o c i t y , 49 succeeded. O f these, 5 swam t h e e n t i r e lenqth of the f l u m e i n one attempt. The swimning time f o r each attempt ranged from 0 . 3 to 6.0 s and averaged from 1.5 to 2.8 s for each test. The distance swam f o r each attempt xanged f r o m -5.3 t o 10.0 f t and averaged from 0 . 9 t o 4 . 2 f t f o r each t e s t . The r e s t period between swimming e f f o r t s ranged from 0 . 3 t o 7 . 3 min a n d averaged from 2.9 t o 3 . 2 min for ea& test. One t e s t was run at 10 ft/s and o n l y one lamprey attempted t o swim t h e flume. I t succeeded i n swimming the f l u m e a f t e r s i x attempts. Two t e s t s were r u n a t 11 ft/s. O f the 10 lampreys that attempted t o swim the flume, 6 were successful, although none swam t h e e n t i r e length of the flume i n one attempt. £ran 0.5 t o 5.0 s and The swimming time f o r each attempt ransed averaged 1 . 6 and 2 . 3 6 f o r each t e s t . The distance swam for each attompt rangod from - 3 . 0 t n 4 . 3 ft and averaged 0.1 and 1.0 ft f o r each test. The x e s t p e r i o d between swimming efforts ranged from 0 . 3 t o 6 . 5 d n and averaged 3.9 and 3.5 min for each t e s t . Two t e s t s were r u n a t 1 2 ft/s. O f t h e 2 5 lampreys t h a t attempted to s w i m the flume, 19 were s u c c e s s f u l , althouqh none swam t h e e n t i r e l e n q t h of t h e flume i n one attempt. The swimming time f o r each attempt ranaed from 0 . 3 t o 4.0 s and averaged 2 . 0 and 2 . 1 s f o r each test. The d i s t a n c e swum f o r each attempt ranged from -4.5 t o 6.0 f t and averaged Q.7 and 1.8 ft for ea& test. The rerrt p e r i o d between swimming e f f o r t a ranged f r o m 0 . 5 to 13.5 min and\averaged 3 . 3 and 4 . 1 min for each test. Five tests were conducted a t 1 3 f t / s j t h e maximum v e l o c i t y produced by t h e test apparatus. O f t h e 1 2 lampreya t h a t attampted t o swim the flume, none were success full although a l l were able t o s w i m t h e f l u m e for various distances. Turbulence a t the head of the flume at this v e l o c i t y appeared t o p r e v e n t t h e m from swimming i t s entire length. atteupt at this v e l o c i t y rmqed from 0.5 t o 5.0 and 1 . 7 s for each t e s t . -3.0 The s w i m i n g t i m e f o r each 9 and averaged between 0 . 8 The d i s t a n c a swum f o r each a t t e m p t ranged from ta 4.5 t t and averaged between 0 . 2 and 0 . 6 f t f o r each t e s t . The r e s t p e r i o d between swimming e f f o r t s ranged from 0 . 5 t o 14.5 min and averased belween 3.3 and 6.0 rnln f o r each t e s t . Conclusions The test animals made relatively f e w a t t e m p t s t o swim the flume when water temperatures were belm 60 OF. Because of t h i s , we still know r e l a t i v e l y l i t t l e about t h e i r swimaclng a b i l i t y i n c o l d e r w a t e r . As t h e water temperature i n c r e a s e d , swinuning a c t i v i t y a l s o i n c r e a s e d . I Moat lampreys that a t t e m p t e d t o swim the flume had l i t t l e d i f f i c u l t y u n t i l the v e l o c i t y was i n c r e a s e d to approxfmately 10 f t / s . As the velocity w a s i n c r e a s e d above this speed, swimminq t h e flume became i n c r e a s i n g l y d i f f i c u l t f o r them. A t t h e higher v e l o c i t i e s , they u s u a l l y d i d n o t s w i m as far d u r i n g an a t t e m p t , a l t h o u g h , i n a few instances, they literally "flaw" up the flume. I n these p a r t i c u l a r cases, t h e y swam a t the s u r f a c e of the w a t e r w i t h only a b o u t the ventral t h i r d of their bodies submersed i n the water. I n this manner, they were able to a v o i d much o f the onrushing water. B u r s t speeds r e p r e s e n t the h i g h e s t v e l o c i t i e s which f i e h can a t t a i n and can be maintained f o r p e r i o h of only a few seconds ( F a r l i n g e r and Beamish 1 9 7 7 ) . 6 s duration. A l l attempts t o s w i m the flume were f o r periods of less t h a n A t v e l o c i t i e s o f 5 and 9 f t / s , some lampreys were able t o swim the flume i n 4-6 s w i t h o u t a t t a c h i n g . Aa the v e l o c i t y was increased, the lampreys a t t a c h e d more often, made less p r o q r e s s up t h e flume d u r i n g each attenpt, and the t i m e of e a c h attempt g e n e r a l l y was of a shorter d u r a t i o n . From these a t u d i e s , I concluded that spawning-run sea lampreys o f e i t h e r s a x are extremely good swimmers and t h a t t h e i r burst swimming speed can exceed 1 3 f t / s . Not o n l y were they a b l e t o m a i n t a i n their p o s i t i o n i n the f l u m e f o r s h o r t periods of t l m e a t this v e l o c i t y , but, i n some i n s t a n c e s , were o b s e r v e d moving upstream against t h i s current a t approximately 1-2 ft/s t t h u s their a c t u a l b u r s t speed i s o v e r 14-15 f t / s . I t has b e e n s u g g e s t e d t h a t i f sea lampreys a r e not able t o a t t a c h t o t h e side of a v e l o c i t y barrier o f s u f f i c i e n t l e n g t h , they may n o t be a b l e t o move upstream, even though their b u r s t swinnning speed i s very h i g h . However, t h e f a c t t h a t some lampreys i n t h e p r e s e n t s t u d y were a b l e to s w i m 10 f t a g a i n s t a w a t e r v e l o c i t y o f 9 f t / s suggests t h a t it would be very d i f f i c u l t t o c r e a t e a velocity barrier on most streams. Moreover, s i n c e a velocity head of 1.25 ft is necessary to create a water v e l o c i t v of 9 f t / s , and since a v e r t i c a l drop of 1.25 ft may, by itself , be a barrier to spawning-run lanpxey, it seems u n l i k e l y t h a t a v e l o c i t y b a r r i e r would be of any b e n e f i t . References Applegate, V . C . , J . H . H o w e l l , J . W . M n f f e t t , B. G . FI. J o h n s o n , and M. A . Smith. 1961. Use of 3-trifluomethyl-4-nitrophenol as a s e l e c t i v e s e a lamprey l a r v i c i d e . Great Lakes Fish. Comm. Tech. Rep. 1, 35 p . B e r g s t e d t , R. A . , D. V. Rottiers, and N. R. Foster. 1977. Laboratow d e t e r m i n a t i o n of maximum swimming speed of migratory sea l a n p r e y s : a feasibility study. Lab. , Research completion Report, Great Lakes Fish. Ann Arbor, 4 p. Davis, W. A . , and W. P. Shera. run sea lamprey. Maximum swimming speed of spawning 1971. R e p o r t of R n n w l M e e t i n g , J u n e 1971. Great Lakes F i s h . C o m m . , Ann A r b o r , Appendix Y , p. 1 2 7 . F a r l i n g e r , S . , a n d F. W . H . Beamish. 1977. Effects o f time and v e l o c i t y i n c r e m e n t s on the c r i t i c a l swimming speed of l a r g e m o u t h bass (Micropterus s a l m o i d e s ) Hanson, L. H. . T r a m . Am. Fish. S o c . 106 : 436-439. 1978. B u r s t s w i m i n g speed of spawning-run sea lampreys (Petromyzon m a r i n u s ) . R e s e a r c h Completion R e p o r t , Great Lakes Fish. l a b . , Ann Arbor, 1 4 p . H o w e l l , J. H . , E . L. King, Jr,, A . J. Smith, a n d L. H . Hanson. Synergism of 5 , 2 ' - d i c h l o r o - 4 ' - n i t r o 1964. salicy l a n i l i d e and 3-trif homethy 1-4-nit r o p h e n o l in a s e l e c t i v e l a m p r e y l a r v i c i d e . Great Lakes F i s h . Comm. Tech. R e p . 8 , 2 1 p. Hunn, J. B . , and W . D. Youngs. 1980. Role o f physical b a r r i e r s i n t h e c o n t r o l of Atlantic sea lamprey (Petromyzon m a r i n u s ) Aquat. Sci. 37: ( i n press). . Can. J. F i s h . Manion, P. J. 1969. Evalllation of lamprey l a r v i c i . d c s in the R i q G a r l i c River and Saux Head Lake. Stauffer, T. M. J. F i s h . ROH. Board Can. 26: 3 0 7 7 - 3 O A 2 . 1964. An experimental sea lamprey b a r r i e r . C u l t . 26: 811-83. Prog. Fish- 3. Test 46 5 51 M a y 22 7 64-67 13 14 2 37 M a y 29 9 63-64 13 40 11 4 -- 78 87 49 13 61-63 13 15 10 of Average 0.6 (-1.0-3.51 (1.0-5.0) (-0.5-1.8) 4.9 (2.0-14.5) 4.7 (2.5-9.3) (0.5-9.0) (-3.0-4.5) 0.3 6.0 (2.0-10.0) 3.3 -(-0.3-1.5) 0.2 0.4 -- 1.8 (0.0-6.0) (-4.5-3.8) 4.1 (0.5-13.5) 3.3 (0.8-8.5) rest pericd Cninl (range in parenthesis) 0.7 Aver age Averace distance swam (ft) Crange in parenthesis) 1.4 1 . 4 . 1.3 (0.5-2.0) 0.8 (0.5-1.0) 1.7 -- (0.3-4.0) 2.1 (0.5-4.6) 2.0 in sec (range in parenthesis) .mimdnq attespts tire Umber Jurte 16 11 59-61 49 52 H-er lampreys atterrpting to swim f l m 0 1 Yay 15 June 3 4 52-53 13 13 N m h r lampreys in f o o t box 34 37 Z u n e 25 19 72- 75 12 Zune 23 Date 17 nmber 65-68 Water temp. (TI (mtirued) 12 n f l m (ft/s) elocity ;'ater - *le M m r 4 0 0 0 0 -- --- ---- 0 0 5 14 atteqt swidnq fl m e s u c ~ s s f u l sucessf. Fn in one Num$.er I