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Salmon Hatching and Release Enterprise in Iwater Prefecture> by S FIS HERIES AND MARINE SERVICE Translation Series No. 4416 • ' Salmon hatching and release enterprise in Iwater Prefecture> by Salmon Breeding Society of Iwater Prefecture Original title: (Unknown) Train: - (Source Unknown) Report 2, P. 1-6, (Undated) ' Translated by the Translati I)n Bureau (MVS/PS) Multilingual Services Division Department of the Secretary of State of Canada Department of the Environment Fisheries and Marine Service Pacific Regional Library Vancouver, B.C. 1978 13 • pages typescript .e• SECRÉTARIATDÉTAT OF THE SECRETARY OF STATE ' DEPARTMENT BUREAU DES TRADUCTIONS TRANSLATION BUREAU DIVISION DES SERVICES SERVICES MULTILINGUAL MULTILINGUES CANADA DYISION - CITY DI VISION/BRANCH VILLE — DEPARTMENT DIVISION / DIRECTION CLIENTS NO. • MIN ISTERE N ° DU CLIENT Fisheries/Scientific -Info.- Ottawa Environment Publications Br TRANSLATOR (INITIALS) LANGUAGE TRADUCTEUR (INITIALES) BUREAU NO. LANGUE NOV NO DU BUREAU • mv s y Japanese 1486872 —II Report no. 2 e':•:` ...- • /-:: 's, :;:.;) r>elease en„.x.,..1...s.Q. 7 -£.'''. 2\-‘ ../ _____.._..1-Q-Salmon ha. 1-1.2.-..-E--.---11 a•nd- in. Iwate Prefecture , - : ,ek;• — ri --,...-- by . 4. ,,." •-.. e.,Zi e.: 0 ...6 Society of Iwate Prefecture ,;... , .4.. 1,;', The Salmon Breeding •!--., O' P 4: ...s. ,. .,,.....„-); ,„çï ,...) •. , ■, I:1.z- . • _ .. • 1--- ' „gtee . • emep› • N „ • . ,,,, •. s• -.‘ ,....,,iir-:-:; ,,A '.e.", ..:- • - i•x•-3.,., -....',••• • ,,.:•:., .,,,, • ..:;- ,.;-,, .■-•,...., .. -.1,..., ..,:. ,. , .,,,,.: 2 • - ..--,1•••,A 17,i7:5". ' '...,: 1:ii....?::_reit.',1•••:;, -•6•:••-•:-; .,:.,.....,_ '..?.., ilete•;.::•".f..;F:y ■:.?, ,f - • te,;-.e,,,,, - i'..,;•,:.••irr,-,•,,,I.r, . 1 ,. ..••'■ "ç'ffeen :1 ■;:,._:',.. 17. 1.•••••:•••,...--., , '•:.' ie ....,..: ••'• • ,^->.oL.'.- •.--'..,„,,,,._.,..,.....i....,..,;„ ;.....„.......,..., .,,,et.„..,..,,,,,:,.,...2,•,....,....•,:.:. ...,..„..:,,.......:......,. ..._,.„..r:....._:,,...•:.,..„.....,..„,...„,;.„.....;._,:........,.,.•,....„.,-,---..,,,,---, :11:: „ ..„ •• 5 05 -20 0 -10-31 1-n,o.3332 2 • Illustration.; Migration courses of the salmon of Hokkaido, Honshu, South Sakhalin and Kuril. Islands. , origin as well as surface currents - (by Tamotsu Yonemori 1975) - - C-2 / , e: • , . - . . • '›e,54elib 1 (1) direction of migration (2) adult salmon (3) immature salmon oli.er 1-year old (4) salmon between 0 and 1 year old (5) Okhotsk return current (6) Oyashio (7)• Kuroshio (8) Eastern Bering current (9) Bering return current (10) Western subfrigid zone return current (11) Sub-Arctic current (12) Alaska current (13) Alaska return current (14) California current (15) west wind skin current (16) boundary layer of the subfrigid zones -(17) North Pacific current The arable numerals in the illustration indicate months. 3 Released salmon mlgrate to the Aleutien Islands district and return after twoto'five years to the rivers in which they were released (principally. after three or four years). Various investigations are going on to increase the return rate of salmon to their mother rivers. Theseeff:orts are. meant to ensure a greater number of salmon which come back near the coast. Your co-;operation for the protection Of salmon .resources will be appreciated in order to maintain and multiply. these resourcès permanently. • 2, Present conditions of salmon hatcheries in Twate Prefecture p 1 The prefecture possesses 19 patcheries in the main coastal rivers and 12 in the Kitagami water system. In rivers having:no hatchery ) fry are - transplanted from other hatcheries so that a large quantity of salmon may come back. „ Piàure 1: Rivgrs with salmon runs as well as stocked rivers (8). (9) (10) 7t(i/t* (11) (A) Morioka (H) Hanamaki (0) Kitagami (D) Mizusawa (E) Ichinoseki Kitagami water system o (11) Hei River o (12) Tsugaruishi River O (1) Shizukuishi River o (13) Omoe River o (2) Kizuki River If1 (14) Osawa River O (3) Takina River o (15) Sekigucht River O (4) Manogawara River o (16) Orikasa River O (5) Hienuki River o (17) Otsuchi River O (6) Sarugaishi River A (18) Kozuchi River O (7) Toyosawa River o (19) Uzumai River o (8) Hanakita A (20) Koshi River O (9) Waga River o (21) Katagishi River o (10) Tanzawa River o (22) Kumano River o (11) Koromo River - o (23) Yoshihama River o (12) Satetsu River • (24) Urahama River o (25) Sakari River Coastal rivers o (26) Kesen River o (1) Uke River o rivers with a hatchery A (2) Koke River rivers without a hatchery o (3) Kuji River . o name of the hatchery o (4) Akka River o (5) Fudai River , (catch in main streams) ! A (6) Matsumae River .0 (7) Omoto.River • o (8) Settài River o (9).Tashiro River A (10) Onabbe River p2 ch beginning of . rivers from the trout ascend the Salmon and :used.for . captured fish are February. The . September to the middle of thé catch ià . Iwate Prefecture, and stooking. In artificial hatching in one ' to gathé-r salmon ,-_ a river with nets mainly conducted-by blocking - . _ . _ • . • . . spot. , . • . • Catch of the fish. abdominal region from the incised are taken out Eggs eggs. Newly mut over the fertilization is effected by shedding The of treatments hatchery after a series placed in the fertilized eggs are washing and water absorption. such as • • • • Z>. e.ç • 3(3 ob. . • 4e" 0. _ •ea. :.'`3 •a• • ,s,`' 0• 09' e 0 • e, I . '' • '<›* • . _ep. Z). e .ee et.•i\. e. ne '4 cb e, e. A . „se nie :-...1b e, 1 o % e e' n;". 0 5 e• eee 1> 4?:s ee %o e e- •'› •i%. `S;se ,,r'e'' .v,(,, % ^oe,ge .)•••-i%• e ,e e, e e .,e,-e› e, 9 - c.?-r oe'' 2;°■ e .'3 à e'ç e e. • )c, e . e .ç e 1.. e '0••• ADP „tre - nie 0. NY' n) e )" 2- 'e• . • 5e) • .sç\. • 1 • (,11.ne and :elease In Iwate Prefeeture e -sinpe 1967, the . young salmon is 'fed during a given period until it. weighs 2 - 4 g before being released. The period of feeding lasts 1 -. 2 .months from the time when the parr begins to swim till the time.Of -release.- The object of rearing salmon before the release is the following: producing healthy fry which can adapt themselves to the environment of their rivers thus cutting down the death rate in. the rivers and seas so that a greater number of salmon may grow in the northern seas to come back later: Release - The Salmon Experiment Station of the prefectural Fisheries p 4' Research Institute at Yamada has carried out with success an experimental release of salmon reared in the.seawater for one month. In spring 1977, the rearing and release of salmon in the seawater were carried out also in Miyako Bay and Otsuchi Bay. .17-NreeTely.7i .e.;17.1n.rprer,rze,..reene... .:2"—lrftr _ ?oh k , L"''s " •W2'- • • • , • • in the seawater Equipment for rearing • in the northern the sea in spring, grows . The salmon goes to spawning in returns to the native river fbr - 4 years and seas for 3 the collection salmon is controlled by man from life of the autumn. The of this effort, the number release-. As a result of of the egg to the of Iwate Prefecture has been coast and rivers salmon returning.tb the increasing. on the • ro.a...ta lo hat hin:. and releas - limit i $ the general Today, the establishment of the 200-mi1e of our prefecture is also The fisheries industry trend of the world. going to be tried severely. I . The . balmôn'hatching'and .release.enterprise of _our prefecture has a history of 72 years since the artificial-hatching and release were effected for the'first time at the Tsugaruishi RiVer.hatchery - - in 1905. The salmon is Universally considered to be an-itportant .species; . Becaube of its high productivity, the propagation of salmon reSources is expected as an important source of protein. - - As shown in Figure 1, the total catch in the rivers and on p the coast have been increasing every year. - The effect of the febding release started in 197 seems particularly remarkable. • Figure Catch of salifion.bY year,in_t,he rivers and on the coast 0 ) ett ,iffirecti, ›) eitl-eleu() mnli'l'grmeee ÉÉ;): kriku•--t- (0 .;i), i.,, • ,,-, //PI Jil - v, illtfittâ ,1 • ie1 lq• Jin eft•Yàre) .iie4.'fli '.-'''in) iiliiie) • iâ ye/ f , t, lA;'' .1 38 ee 195 819 1,014 65,110 234,000 299,110 0.21 0.226 39 46,531, . 184 6379' 823 61,215 182,571 243,786 0,25 0,243 40 33,194 110 522 632 . 36,561 149,142 185,703 '0.20 • • 0.099 41 57,435 164 . 947 1,111 . 54,623 270,571 325,194 0.17. 0.077 42 ' 51,918 • 139 702 841 46,226 200,571 246,797 0.19 • 0.101 43 49,673 143 497 640 .47,601 142,000 189.,601 • 0.25 0.102 14 46,761 129 494 623 43,135 141,142 184,277 0.23 . 0.130 45 46,028 157 638 795 52,348 182,285 234,633 0.22 0.091 46 97,274 387 1,511 1,898 • 128,863 431,714 560,577 0.23, 0;248 47 118,106 492 1,754 2,156 134,126 501,142 635,268 . 0.21 ' d.270 48 135,704 340 1,461 1,801 113,260 417,428 530,688 0.21 0.242 49 125,414 31j 1,579 1,892 .104,381 451,142 555,523 0.19 0.227 50 140,486 641 2,670 3,311 188,570 778,87j 967,443 0.19 0.194' 51 -144,430 436 . 3,002 3,438 132,290 909,768 1,042,058 0.12 • 0.112 e ,) o (uill_Lki) Dal! , ,,twûtemlfit 45 i j ' ' .4 0 9 - e- 45-481-el 0 . 9 7 fi • 46 1.080 47 1.279 0 46-49e 1?,i. 1.175 48 1.135 , 49 1.207 @ 47 -solee) 1.1 5 4 50 ' .9 9 5 (:) 48-51-tee.
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