{"id":1421,"date":"2025-02-06T11:22:17","date_gmt":"2025-02-06T11:22:17","guid":{"rendered":"https:\/\/laxakeldum.is\/?page_id=1421"},"modified":"2025-04-18T10:14:45","modified_gmt":"2025-04-18T10:14:45","slug":"seidarannsoknir-eystri-ranga-arid-2013","status":"publish","type":"page","link":"https:\/\/laxakeldum.is\/en\/seidarannsoknir-eystri-ranga-arid-2013\/","title":{"rendered":"Sei\u00f0aranns\u00f3knir Eystri Rang\u00e1 \u00e1ri\u00f0 2013"},"content":{"rendered":"

VMST\/14018<\/p>\n\n\n\n

Sei\u00f0aranns\u00f3knir \u00ed Eystri-Rang\u00e1 og Fisk\u00e1 \u00e1ri\u00f0 2013<\/h1>\n\n\n\n

Magn\u00fas J\u00f3hannsson og<\/p>\n\n\n\n

Ben\u00f3n\u00fd J\u00f3nsson<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Vei\u00f0im\u00e1lastofnun Vei\u00f0in\u00fdting   \u2022    <\/strong>L\u00edfr\u00edki \u00ed \u00e1m og v\u00f6tnum   \u2022    <\/strong>Research   \u2022    <\/strong>R\u00e1\u00f0gj\u00f6f<\/p>\n\n\n\n

Fors\u00ed\u00f0umynd: Fisk\u00e1 vi\u00f0 glj\u00fafurmynni Mynd: Magn\u00fas J\u00f3hannsson<\/p>\n\n\n\n

VMST\/14018<\/p>\n\n\n\n

Sei\u00f0aranns\u00f3knir \u00ed Eystri-Rang\u00e1 og Fisk\u00e1 \u00e1ri\u00f0 2013<\/h1>\n\n\n\n

Magn\u00fas J\u00f3hannsson og<\/p>\n\n\n\n

Ben\u00f3n\u00fd J\u00f3nsson<\/p>\n\n\n\n

Unni\u00f0 fyrir Vei\u00f0if\u00e9lag Eystri-Rang\u00e1r<\/p>\n\n\n\n

EFNISYFIRLIT<\/h2>\n\n\n\n

Bls.<\/p>\n\n\n\n

INNGANGUR……………………………………………………………………………………………………………….. 1<\/a><\/p>\n\n\n\n

STA\u00d0H\u00c6TTIR………………………………………………………………………………………………………………. 1<\/a><\/p>\n\n\n\n

VEI\u00d0I………………………………………………………………………………………………………………………….. 3<\/a><\/p>\n\n\n\n

FRAMKV\u00c6MD……………………………………………………………………………………………………………… 4<\/a><\/p>\n\n\n\n

SEI\u00d0ARANNS\u00d3KNIR……………………………………………………………………………………………………… 4<\/a><\/p>\n\n\n\n

UMR\u00c6\u00d0A……………………………………………………………………………………………………………………. 7<\/a><\/p>\n\n\n\n

\u00deAKKAROR\u00d0……………………………………………………………………………………………………………….. 9<\/a><\/p>\n\n\n\n

HEIMILDIR………………………………………………………………………………………………………………….. 9<\/a><\/p>\n\n\n\n

MYNDASKR\u00c1<\/p>\n\n\n\n

Mynd 1. Yfirlitskort yfir Eystri-Rang\u00e1 og Fisk\u00e1…………………………………………………………………. 2<\/a><\/p>\n\n\n\n

Mynd 2. Fj\u00f6ldi stangveiddra laxa, urri\u00f0a og bleikju \u00ed Eystri-Rang\u00e1 og Fisk\u00e1…………………………. 3<\/a><\/p>\n\n\n\n

Mynd 3. Lengdardreifing og aldur laxasei\u00f0a eftir st\u00f6\u00f0vum \u00ed Eystri-Rang\u00e1 og Fisk\u00e1………………. 5<\/a><\/p>\n\n\n\n

Mynd 4. Lengdardreifing urri\u00f0asei\u00f0a og aldur eftir athugunarst\u00f6\u00f0vum……………………………… 6<\/a><\/p>\n\n\n\n

Mynd 5. Lengdardreifing bleikjusei\u00f0a og aldur eftir athugunarst\u00f6\u00f0um…………………………….. 6<\/a><\/p>\n\n\n\n

Mynd 6. F\u00e6\u00f0a sei\u00f0a eftir tegundum \u00ed Eystri-Rang\u00e1 og Fisk\u00e1……………………………………………… 7<\/a><\/p>\n\n\n\n

T\u00f6fluskr\u00e1<\/p>\n\n\n\n

Tafla 1. Hnit rafvei\u00f0ist\u00f6\u00f0va, veiddir fermetrar, raflei\u00f0ni vatns, vatnshiti og botnger\u00f0 \u00e1 st\u00f6\u00f0v.4<\/a> Tafla 2. \u00de\u00e9ttleiki sei\u00f0a eftir tegundum og aldri \u00ed Eystri-Rang\u00e1 og Fisk\u00e1 7. okt\u00f3ber 2013……………….. 5<\/a><\/p>\n\n\n\n

Tafla 3. Me\u00f0allengd sei\u00f0a \u00far sei\u00f0aranns\u00f3knum eftir st\u00f6\u00f0vum tegundum og aldri……………….. 7<\/a><\/p>\n\n\n\n

<\/a>Inngangur<\/h2>\n\n\n\n

\u00c1 haustd\u00f6gum 2013 barst Vei\u00f0im\u00e1lastofnun \u00f3sk um ums\u00f6gn vegna framkv\u00e6mda vi\u00f0 Eystri-Rang\u00e1 og Fisk\u00e1 \u00ed Rang\u00e1r\u00feingi eystra. Um er a\u00f0 r\u00e6\u00f0a grj\u00f3tv\u00f6rn og d\u00fdpkun \u00e1 Bakkavallahyl \u00ed Fisk\u00e1 og d\u00fdpkun og grj\u00f3tv\u00f6rn \u00e1 vei\u00f0ista\u00f0 vi\u00f0 Fagradal r\u00e9tt ofan vi\u00f0 \u00f3s Fisk\u00e1r. Framkv\u00e6mdara\u00f0ili er Vei\u00f0if\u00e9lag Eystri-Rang\u00e1r. Tilgangur framkv\u00e6mdanna er einkum a\u00f0 koma \u00ed veg fyrir frekara landbrot. Fari\u00f0 var \u00e1 vettvang og ger\u00f0 ums\u00f6gn um \u00e1hrif framkv\u00e6mdanna (Magn\u00fas J\u00f3hannsson 2013). A\u00f0 \u00f3sk vei\u00f0if\u00e9lagsins var samhli\u00f0a ger\u00f0 sei\u00f0aranns\u00f3kn \u00ed \u00e1num utan \u00e1hrifasv\u00e6\u00f0is framkv\u00e6mdanna.<\/p>\n\n\n\n

\u00c1r \u00e1 vatnasv\u00e6\u00f0i Eystri-Rang\u00e1r eru fr\u00e1 n\u00e1tt\u00farunnar hendi silungs\u00e1r og til skamms t\u00edma hefur l\u00edti\u00f0 veri\u00f0 \u00fear af laxi. \u00c1 s\u00ed\u00f0ustu \u00e1rum hefur miklu magni laxag\u00f6gnusei\u00f0a veri\u00f0 sleppt \u00ed \u00e1rnar sem hefur skila\u00f0 \u00feeim \u00e1rangri a\u00f0 n\u00fa er \u00fear stundu\u00f0 \u00f6flug stangvei\u00f0i \u00e1 laxi. \u00cd fyrri skrifum Vei\u00f0im\u00e1lastofnunar hefur veri\u00f0 ger\u00f0 grein fyrir \u00e1rangri \u00feessarra sleppinga (Magn\u00fas J\u00f3hannsson og Gu\u00f0ni Gu\u00f0bergsson 1991a og 1991b, Gu\u00f0ni Gu\u00f0bergsson og Magn\u00fas J\u00f3hannsson 1991 og Magn\u00fas J\u00f3hannsson o.fl. 1996). M\u00f6rg undanfarin \u00e1r hefur engum silungasei\u00f0um veri\u00f0 sleppt \u00e1 vatnasv\u00e6\u00f0i Eystri-Rang\u00e1r utan a\u00f0 \u00e1ri\u00f0 2013 var sleppt 10 \u00fe\u00fas. st\u00e1lpu\u00f0um urri\u00f0asei\u00f0um \u00ed Fisk\u00e1 (Einar L\u00fa\u00f0v\u00edksson pers uppl.).<\/p>\n\n\n\n

Af fyrri fiskranns\u00f3knum m\u00e1 nefna a\u00f0 \u00e1ri\u00f0 1974 voru \u00e1 vegum Vei\u00f0im\u00e1lastofnunar k\u00f6nnu\u00f0 l\u00edfsskilyr\u00f0i laxfiska \u00e1 vatnasv\u00e6\u00f0i Rang\u00e1nna (Teitur Arnlaugsson 1974). Teitur ger\u00f0i \u00fattekt \u00e1 hitastigi, botnger\u00f0 og straumi auk \u00feess sem hann safna\u00f0i uppl\u00fdsingum um vei\u00f0i. \u00de\u00e1 voru b\u00fasv\u00e6\u00f0i laxfiska metin og sei\u00f0ab\u00faskapur kanna\u00f0ur \u00e1ri\u00f0 1998 (Mang\u00fas J\u00f3hannsson og \u00de\u00f3r\u00f3lfur Antonsson 1998). Sei\u00f0aranns\u00f3knirnar s\u00fdndu uppeldi laxasei\u00f0a \u00ed Fisk\u00e1 og Eystri-Rang\u00e1, einkum ne\u00f0an \u00e1rm\u00f3ta Fisk\u00e1r. Annars voru bleikjusei\u00f0i r\u00edkjandi \u00ed Eystri-Rang\u00e1. Botnger\u00f0 er umhverfis\u00fe\u00e1ttur sem hefur mikla \u00fe\u00fd\u00f0ingamikill fyrir b\u00fasv\u00e6\u00f0i laxfiskasei\u00f0a. Steinar veita skj\u00f3l og fylgsni fyrir afr\u00e6ningjum jafnframt \u00fev\u00ed sem gr\u00f3f og fj\u00f6lbreyttari botnger\u00f0 skapar aukin b\u00fasv\u00e6\u00f0i fyrir f\u00e6\u00f0ud\u00fdr sei\u00f0anna. B\u00fasv\u00e6\u00f0i laxfiska voru best hva\u00f0 botnger\u00f0 var\u00f0ar \u00ed Fisk\u00e1 en gr\u00fdttur botn er afgerandi \u00fe\u00e1ttur til a\u00f0 sei\u00f0i laxfiska \u00fer\u00edfist \u00ed \u00e1m. Botnger\u00f0 Eystri-Rang\u00e1r, \u00e1 laxgengum hluta, er v\u00ed\u00f0ast fremur sm\u00e1korn\u00f3tt og skilyr\u00f0i fyrir st\u00e6rri sei\u00f0i mj\u00f6g takm\u00f6rku\u00f0. L\u00e1gur vatnshiti og botnger\u00f0 er l\u00edklega takmarkandi fyrir lax \u00ed Eystri-Rang\u00e1 (Mang\u00fas J\u00f3hannsson og \u00de\u00f3r\u00f3lfur Antonsson 1998).<\/p>\n\n\n\n

Megintilgangur \u00feessarar ranns\u00f3knar var a\u00f0 kanna \u00fe\u00e9ttleika og dreifingu tegunda laxfiskasei\u00f0a \u00ed Fisk\u00e1 og Eystri-Rang\u00e1. Ranns\u00f3knir f\u00f3ru fram 7. okt\u00f3ber 2013.<\/p>\n\n\n\n

<\/a>Sta\u00f0h\u00e6ttir<\/h2>\n\n\n\n

Eystri-Rang\u00e1 \u00e1 a\u00f0aluppt\u00f6k s\u00edn \u00ed Rang\u00e1rbotnum, su\u00f0vestur af Laufafelli \u00ed um 600 m h\u00e6\u00f0 yfir sj\u00e1varm\u00e1li. Fr\u00e1 uppt\u00f6kum til \u00f3sa eru 61 km. Eystri-Rang\u00e1 er laxgeng a\u00f0 Tungufossi, e\u00f0a um 19 km. \u00c1in er a\u00f0 stofni til lind\u00e1 en \u00fe\u00f3 fellur til hennar nokku\u00f0 af dragvatni og einnig j\u00f6kulvatn (Sigurj\u00f3n Rist 1969), sem orsakar j\u00f6kullit \u00e1rvatnsins \u00feegar br\u00e1\u00f0nun er mikil af Tindfjallaj\u00f6kli. Vatnasvi\u00f0i\u00f0 er 562 km2<\/sup>. Me\u00f0alrennsli \u00e1rinnar vi\u00f0 Tungufoss er um 20 m3<\/sup>\/sek (Sigurj\u00f3n Rist<\/p>\n\n\n\n

1990). Keldnal\u00e6kur og Teitsv\u00f6tn eru stuttir lindarl\u00e6kir sem falla til \u00e1rinnar ofan vi\u00f0 Tungufoss. \u00deeir eru samtals um 11 m3<\/sup>\/sek og vatnshiti \u00ed uppt\u00f6kum um 3,1 \u00b0C (Teitur Arnlaugsson 1974). \u00deetta er um helmingur \u00feess vatns sem rennur um Tungufoss. Lindarvatn<\/p>\n\n\n\n

<\/a>Mynd 1. <\/em><\/strong>Yfirlitskort af Eystri-Rang\u00e1 og Fisk\u00e1. N\u00famer sei\u00f0aranns\u00f3knast\u00f6\u00f0va koma fram.<\/em><\/p>\n\n\n\n

\u00feetta k\u00e6lir \u00e1rvatni\u00f0 a\u00f0 sumarlagi. Efst \u00e1 laxgenga hluta \u00e1rinnar falla til Eystri-Rang\u00e1r, Fisk\u00e1 \u00far austri sem er a\u00f0 stofni til drag\u00e1 og Stokkal\u00e6kur \u00far vestri sem er lindarl\u00e6kur. Strandars\u00edki, sem er fremur vatnsl\u00edtill l\u00e6kur, fellur til \u00e1rinnar um 3,5 km ofan vi\u00f0 \u00e1rm\u00f3t vi\u00f0 \u00dever\u00e1. \u00c1 fiskgengum sv\u00e6\u00f0um er botnefni Eystri-Rang\u00e1r fremur f\u00ednt, er gr\u00f3fast efst, \u00fear er botn sm\u00e1gr\u00fdttur og st\u00f3rgr\u00fdttur (\u00feverm\u00e1l steina > 7 cm).  Botn ver\u00f0ur f\u00ednni og b\u00fasv\u00e6\u00f0i laxfiska<\/p>\n\n\n\n

s\u00ed\u00f0ri \u00feegar ne\u00f0ar dregur og vi\u00f0 \u00f3s einkennist botninn af sm\u00e1korn\u00f3ttri m\u00f6l (< 7 cm \u00ed \u00feverm\u00e1l) sandi og leir (Magn\u00fas J\u00f3hannsson og \u00de\u00f3r\u00f3lfur Antonsson 1998). Efst \u00e1 fiskgenga hlutanum er \u00e1in k\u00f6ld og n\u00e6r vart meira en 6-7 \u00b0C a\u00f0 sumarlagi (Teitur Arnlaugsson 1974).<\/p>\n\n\n\n

Fisk\u00e1 er helsta \u00fever\u00e1 Eystri-Rang\u00e1r. H\u00fan er drag\u00e1 me\u00f0 lind\u00e1reinkennum, \u00e1 uppt\u00f6k s\u00edn \u00ed Rau\u00f0nefssta\u00f0afjalli og er um 22 km a\u00f0 lengd. Vatnasvi\u00f0 \u00e1rinnar er 76 km2<\/sup>. Rennsli Fisk\u00e1r er mj\u00f6g breytilegt. Ekki eru tilt\u00e6kar n\u00e1kv\u00e6mar rennslism\u00e6lingar en vi\u00f0 \u00f3s hefur \u00fea\u00f0 veri\u00f0 meti\u00f0 algengast um 1,5-4,0 m3<\/sup>\/sek (Magn\u00fas J\u00f3hannsson og Gu\u00f0ni Gubergsson 1990). B\u00e6jarfoss, sem er um 2 km fr\u00e1 \u00f3si, er hindrun fyrir fiskg\u00f6ngur en Fisk\u00e1 er talin fiskgeng fr\u00e1 n\u00e1tt\u00farunnar hendi a\u00f0 Sk\u00fatufossi sem er um 2,7 km fr\u00e1 \u00f3si. Hvammafoss sem er um 7 km fr\u00e1 \u00f3si er l\u00edklega fiskgengur. \u00c1ri\u00f0 1982 var bygg\u00f0ur fiskstigi \u00ed Sk\u00fatufossi. Me\u00f0 byggingu hans var tali\u00f0 a\u00f0 fiskur g\u00e6ti gengi\u00f0 a\u00f0 Heybandsfossi sem er t\u00e6pa 16 km fr\u00e1 \u00f3si (Magn\u00fas J\u00f3hannsson og \u00de\u00f3r\u00f3lfur Antonsson 1998, mynd 1). \u00c1 \u00e1reyrum r\u00e9tt ofan vi\u00f0 \u00f3s er manngert l\u00f3n sem f\u00e6r vatn \u00far Fisk\u00e1 en \u00fea\u00f0an er \u00fev\u00ed mi\u00f0la\u00f0 \u00ed g\u00f6ngusei\u00f0atjarnir.<\/p>\n\n\n\n

<\/a>Vei\u00f0i<\/h2>\n\n\n\n

Vei\u00f0i \u00e1 vatnasv\u00e6\u00f0i Eystri-Rang\u00e1r byggir a\u00f0 mestu leyti \u00e1 sleppingum alinna laxag\u00f6ngusei\u00f0a. Einhver, en \u00f3\u00feekktur, hluti laxa er n\u00e1tt\u00farulegur, \u00fe.e. elst upp \u00ed \u00e1num. \u00c1 sv\u00e6\u00f0inu vei\u00f0ast einnig bleikja og urri\u00f0i sem a\u00f0allega er sj\u00f3birtingur. G\u00f3\u00f0 vei\u00f0iskr\u00e1ning er einn af horsteinum n\u00fdtingar og \u00fe\u00e6r eru gjarnan lag\u00f0ar til grundvallar vi\u00f0 mat \u00e1 framkv\u00e6mdum sem snerta l\u00edfr\u00edki \u00ed \u00e1m og vei\u00f0in\u00fdtingu. \u00c1rleg vei\u00f0iskr\u00e1ning hefur veri\u00f0 \u00ed Eystri-Rang\u00e1 og Fisk\u00e1 fr\u00e1 og me\u00f0 \u00e1rinu 1991. Me\u00f0alvei\u00f0i \u00e1ranna 2003-2012 var 4.543 laxar 158 urri\u00f0ar og 24 bleikjur (mynd 2, Gu\u00f0ni Gu\u00f0bergsson 2013). Laxvei\u00f0i \u00ed Eystri-Rang\u00e1 og Fisk\u00e1 byggir eins og fyrr segir a\u00f0 langmestu leyti \u00e1 sleppingum g\u00f6ngusei\u00f0a sem alinn eru \u00ed g\u00f6ngust\u00e6r\u00f0 \u00ed eldisst\u00f6\u00f0 en silungurinn er a\u00f0 mestu n\u00e1tt\u00farulegur. Mikil aukning var\u00f0 \u00ed sj\u00f3birtingsvei\u00f0i \u00e1rin 2006 og 2007. Talsver\u00f0 minnkun hefur veri\u00f0 eftir 2007. Bleikjuvei\u00f0in hefur einnig dregist saman en ekki eins miki\u00f0.<\/p>\n\n\n\n

<\/a>Mynd 2. <\/strong>Fj\u00f6ldi stangveiddra laxa, urri\u00f0a (sj\u00f3birtinga) og bleikja \u00ed Eystri-Rang\u00e1 og Fisk\u00e1.<\/em>
<\/p>\n\n\n\n

<\/a>Framkv\u00e6md<\/h1>\n\n\n\n

Metin var v\u00edsitala sei\u00f0a\u00fe\u00e9ttleika (h\u00e9r eftir nefndur \u00fe\u00e9ttleiki) sem er fj\u00f6ldi veiddra sei\u00f0a \u00e1 100 m2<\/sup> botnflatar \u00ed einni rafvei\u00f0iyfirfer\u00f0. \u00d6ll sei\u00f0i sem veiddust voru tegundargreind, lengdarm\u00e6ld (s\u00fdlingarlengd), og hj\u00e1 hluta \u00feeirra var f\u00e6\u00f0a athugu\u00f0 \u00e1 sta\u00f0num og tekin kvarna\u2013 og hreisturss\u00fdni til s\u00ed\u00f0ari aldurs\u00e1kv\u00f6r\u00f0unar. Hlutfallslegt r\u00famm\u00e1l hverrar f\u00e6\u00f0uger\u00f0ar var \u00e1\u00e6tla\u00f0 samkv\u00e6mt sj\u00f3nmati. Magafylli var gefin gildi fr\u00e1 0 til 5 \u00fear sem 0 er t\u00f3mur magi og 5 er tro\u00f0fullur magi. Rafveitt var \u00e1 3 st\u00f6\u00f0um \u00ed Eystri-Rang\u00e1 og 3 st\u00f6\u00f0um \u00ed Fisk\u00e1. Gr\u00f3fleiki botnefnis var metinn \u00e1 rafvei\u00f0ist\u00f6\u00f0vunum. Gr\u00f3fleika var skipt \u00ed fimm flokka; leir\/ sandur (< 1 cm \u00ed \u00feverm\u00e1l), m\u00f6l (1-7 cm), sm\u00e1gr\u00fdti (7-20 cm), st\u00f3rgr\u00fdti (>20 cm) og kl\u00f6pp. Hlutdeild (%) hvers flokks var metin eftir auganu.<\/p>\n\n\n\n

<\/a>Sei\u00f0aranns\u00f3knir<\/h2>\n\n\n\n

Sei\u00f0aranns\u00f3knir \u00ed Eystri-Rang\u00e1r f\u00f3ru fram \u00e1 \u00feremur st\u00f6\u00f0um me\u00f0 austurbakka \u00e1rinnar, um 500 m ne\u00f0an vi\u00f0 Tungufoss (st. 1), vi\u00f0 Bergsnef (st. 12), og m\u00f3ts vi\u00f0 L\u00f3ut\u00fan (st. 3) (mynd 1). \u00c1 st\u00f6\u00f0vunum \u00ed Eystri-Rang\u00e1 var botn gr\u00f3fastur \u00e1 efstu st\u00f6\u00f0 en \u00fear var mest m\u00f6l og sm\u00e1gr\u00fdti \u00e1 botni. Ne\u00f0ar (st. 12) einkennist botninn af m\u00f6l og \u00e1 ne\u00f0stu st\u00f6\u00f0 (st. 3) af m\u00f3kl\u00f6pp. Botn var gr\u00f3fastur, mest sm\u00e1gr\u00fdti, \u00e1 efstu st\u00f6\u00f0 \u00ed Fisk\u00e1 (st. 9), mest m\u00f6l og sm\u00e1gr\u00fdti \u00e1 mi\u00f0st\u00f6\u00f0inni (st. 11) og m\u00f6l \u00e1 ne\u00f0stu st\u00f6\u00f0inni (st. 10). Straumur var v\u00ed\u00f0ast str\u00ed\u00f0ur og allnokkur gr\u00f3\u00f0ur\u00feekja (30-80%). Raflei\u00f0ni m\u00e6ldist 111 og 126 \u00b5S\/cm \u00ed Eystri-Rang\u00e1 og 122 \u00b5S\/cm \u00ed Fisk\u00e1 (tafla 1).<\/p>\n\n\n\n

<\/a>Tafla 1. <\/strong>Hnit rafvei\u00f0ist\u00f6\u00f0va, veiddir fermetrar, raflei\u00f0ni vatns, vatnshiti og botnger\u00f0 \u00e1 st\u00f6\u00f0vunum.<\/p>\n\n\n\n

 <\/td> <\/td>  Gps hnit<\/em><\/td> <\/td> <\/td> <\/td> <\/td> <\/td>  Botnger\u00f0 %<\/em><\/td> <\/td> <\/td><\/tr>
  Vatnsfall<\/em><\/em><\/td>  Nr<\/em><\/em><\/td>  N<\/em><\/em><\/td>  W<\/em><\/em><\/td>Sv\u00e6\u00f0i <\/em>m<\/em>2<\/em><\/em><\/td>Lei\u00f0in<\/em><\/em> \u00b5S\/cm<\/em><\/em><\/td>Vatns-<\/em><\/em> hiti \u00b0C<\/em><\/td>  Sandur<\/em><\/em><\/td>  1-7<\/td>  7-<\/em>20<\/em><\/em><\/td>  >20<\/em><\/em><\/td>  Kl\u00f6pp<\/em><\/em><\/td><\/tr>
Eystri-Rang\u00e1<\/em><\/em><\/td>1<\/td>63\u00b047.932<\/td>20\u00b006.958<\/td>152<\/td>111<\/td>3,6<\/td>5<\/td>50<\/td>40<\/td>5<\/td>0<\/td><\/tr>
Eystri-Rang\u00e1<\/em><\/em><\/td>12<\/td>63\u00b047.780<\/td>20\u00b009.853<\/td>55<\/td> <\/td> <\/td>10<\/td>75<\/td>15<\/td>0<\/td>0<\/td><\/tr>
Eystri-Rang\u00e1<\/em><\/em><\/td>3<\/td>63\u00b047.228<\/td>20\u00b012.172<\/td>116<\/td>126<\/td>4,1<\/td>5<\/td>10<\/td>5<\/td>0<\/td>80<\/td><\/tr>
Fisk\u00e1<\/em><\/em><\/td>9<\/td>63\u00b047.384<\/td>20\u00b007.380<\/td>64<\/td> <\/td> <\/td>5<\/td>10<\/td>65<\/td>20<\/td>0<\/td><\/tr>
Fisk\u00e1<\/em><\/em><\/td>11<\/td>63\u00b047.387<\/td>20\u00b007.931<\/td>78<\/td>122<\/td>4,0<\/td>5<\/td>50<\/td>30<\/td>15<\/td>0<\/td><\/tr>
Fisk\u00e1<\/em><\/em><\/td>10<\/td>63\u00b047.808<\/td>20\u00b008.044<\/td>141<\/td> <\/td> <\/td>10<\/td>70<\/td>15<\/td>5<\/td>0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Vi\u00f0 Tungufoss var \u00fe\u00e9ttleiki sei\u00f0a l\u00e1gur og n\u00e6r eing\u00f6ngu a\u00f0 finna bleikjusei\u00f0i \u00e1 fyrsta (0+) og \u00f6\u00f0ru \u00e1ri (1+). Laxasei\u00f0i (1+) voru 21% af sei\u00f0um allra tegunda. Vi\u00f0 Bergsnef voru bleikjusei\u00f0i \u00ed meirihluta, voru \u00feau \u00f6ll \u00e1 fyrsta \u00e1ri. \u00dear fundust einnig urri\u00f0asei\u00f0i \u00e1 fyrsta og \u00f6\u00f0ru \u00e1ri \u00ed allnokkrum m\u00e6li en engin laxasei\u00f0i (tafla 2). \u00dear var \u00fe\u00e9ttleiki sei\u00f0a mestur (32,7 sei\u00f0i\/100m2<\/sup>). Vi\u00f0 L\u00f3ut\u00fan veiddust laxa- urri\u00f0a- og bleikjusei\u00f0i, allt sei\u00f0i \u00e1 fyrsta \u00e1ri. Auk \u00feess fundust \u00fear horns\u00edli. Laxasei\u00f0in voru \u00ed meirihluta (58,7%) og voru \u00feau flest eins \u00e1rs.<\/p>\n\n\n\n

\u00cd Fisk\u00e1 vi\u00f0 glj\u00fafurmynni (st. 9) fundust urri\u00f0a- og laxasei\u00f0i \u00ed allnokkrum \u00fe\u00e9ttleika. Hlutdeild laxasei\u00f0a var 40,5%. \u00de\u00e9ttleiki sei\u00f0a var minnstur \u00e1 ne\u00f0stu st\u00f6\u00f0inni og hlutdeild laxasei\u00f0a mun l\u00e6gra en \u00e1 \u00f6\u00f0rum st\u00f6\u00f0vum (tafla 2). Bleikjusei\u00f0i komu fram \u00e1 ne\u00f0ri<\/p>\n\n\n\n

st\u00f6\u00f0vunum tveimur og voru \u00feau \u00ed meirihluta (67%) ne\u00f0st \u00ed Fisk\u00e1 (st. 10). Lengdardreifing sei\u00f0a kemur fram \u00e1 myndum 3 til 5.<\/p>\n\n\n\n

<\/a>Tafla 2. <\/strong>\u00de\u00e9ttleiki sei\u00f0a eftir tegundum og aldri \u00ed Eystri-Rang\u00e1 og Fisk\u00e1 7. okt\u00f3ber 2013. T\u00f6lurnar standa fyrir veidd sei\u00f0i \u00e1 100 m2<\/sup>.<\/p>\n\n\n\n

 <\/td> <\/td> <\/td>Lax<\/em><\/em><\/td>Lax<\/em><\/em><\/td>Urri\u00f0i<\/em><\/em><\/td>Urri\u00f0i<\/em><\/em><\/td>Bleikja<\/em><\/em><\/td>Bleikja<\/em><\/em><\/td> <\/td> <\/td><\/tr>
 <\/td>Sta\u00f0ur<\/td>St\u00f6\u00f0 nr.\/aldur<\/td> <\/td> <\/td> <\/td> <\/td> <\/td> <\/td>Samtals<\/em><\/em> laxfiskar<\/em><\/em><\/td>Hlutur<\/em><\/em> lax (%)<\/em><\/td><\/tr>
Vatnsfall<\/td> <\/td>0+<\/em><\/em><\/td>1+<\/em><\/em><\/td>0+<\/em><\/em><\/td>1+<\/em><\/em><\/td>0+<\/em><\/em><\/td>1+<\/em><\/em><\/td><\/tr>
  Eystri-Rang\u00e1<\/td>  Tungufoss<\/td>  1<\/td> <\/td>  0,7<\/td> <\/td> <\/td>  2,0<\/td>  0,7<\/td>  3,3<\/td>  21,2<\/td><\/tr>
Eystri-Rang\u00e1<\/td>Bergsnef<\/td>12<\/td> <\/td> <\/td>12,7<\/td>1,8<\/td>18,2<\/td> <\/td>32,7<\/td>0<\/td><\/tr>
Eystri-Rang\u00e1<\/td>L\u00f3ut\u00fan<\/td>3<\/td>6,1<\/td> <\/td>1,7<\/td> <\/td>2,6<\/td> <\/td>10,4<\/td>58,7<\/td><\/tr>
Fisk\u00e1<\/td>V. glj\u00fafurmynni<\/td>9<\/td>7,8<\/td>15,6<\/td>31,3<\/td>3,1<\/td> <\/td> <\/td>57,8<\/td>40,5<\/td><\/tr>
Fisk\u00e1<\/td>Bakkavallahylur<\/td>11<\/td>5,1<\/td>2,6<\/td>15,4<\/td> <\/td> <\/td>1,3<\/td>24,4<\/td>31,6<\/td><\/tr>
Fisk\u00e1<\/td>Ofan \u00f3ss<\/td>10<\/td>0,7<\/td> <\/td>2,1<\/td> <\/td>5,7<\/td> <\/td>8,5<\/td>8,2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

St\u00e6r\u00f0 sei\u00f0a eftir aldri gefur hugmynd um vaxtarskilyr\u00f0i \u00e1 vi\u00f0komandi sta\u00f0. Me\u00f0alst\u00e6r\u00f0 jafngamalla sei\u00f0a var h\u00e6rri \u00ed Fisk\u00e1 en \u00ed Eystri-Rang\u00e1 (tafla 3). Athygli vekur hversu st\u00f3r laxasei\u00f0i \u00e1 \u00f6\u00f0ru \u00e1ri (1+) voru \u00ed Fisk\u00e1, voru flest um og yfir 10 cm l\u00f6ng (mynd 3 tafla 3).<\/p>\n\n\n\n

<\/a>Mynd 5. <\/em><\/strong>Lengdardreifing og aldur bleikjusei\u00f0a eftir st\u00f6\u00f0um \u00ed Eystri-Rang\u00e1 og Fisk\u00e1.<\/em><\/p>\n\n\n\n

<\/a>Tafla 3. <\/strong>Me\u00f0allengd (cm) sei\u00f0a \u00far sei\u00f0aranns\u00f3knum eftir st\u00f6\u00f0vum tegundum og aldri \u00ed Eystri-Rang\u00e1 og Fisk\u00e1. Fram koma \u00b1sta\u00f0alfr\u00e1vik og fj\u00f6ldi sei\u00f0a \u00ed sviga aftan vi\u00f0 me\u00f0allengdir.<\/em><\/p>\n\n\n\n

 <\/td> <\/td>Lax<\/em><\/em><\/td> <\/td>Urri\u00f0i<\/em><\/em><\/td> <\/td>Bleikja<\/em><\/em><\/td>Horns\u00edli<\/em><\/em><\/td><\/tr>
 <\/em> Vatnsfall<\/em><\/em><\/td>St\u00f6\u00f0<\/em><\/em> nr.<\/em><\/em><\/td> <\/em> 0+<\/em><\/em><\/td> <\/em> 1+<\/em><\/em><\/td> <\/em> 0+<\/em><\/em><\/td> <\/em> 1+<\/em><\/em><\/td> <\/em> 0+<\/em><\/em><\/td> <\/em> 1+<\/em><\/em><\/td><\/tr>
 <\/em> Eystri-Rang\u00e1<\/td> <\/em> 1<\/td> <\/td> <\/em> 9,0 (1)<\/td> <\/td> <\/td> <\/em> 5,9\u00b10,4<\/td> <\/em> 7,5 (1)<\/td><\/tr>
Eystri-Rang\u00e1<\/td>12<\/td> <\/td> <\/td>4,8\u00b10,4 (7)<\/td>6,7 (1)<\/td>4,8\u00b10,4<\/td> <\/td><\/tr>
Eystri-Rang\u00e1<\/td>3<\/td>3,7\u00b10,1 (7)<\/td> <\/td>4,4\u00b10,1 (2)<\/td> <\/td>6,1\u00b11,1<\/td>4,3 (1)<\/td><\/tr>
Fisk\u00e1<\/td>9<\/td>5,3\u00b10,3 (5)<\/td>10,4\u00b11,0 (10)<\/td>5,4\u00b10,5 (20)<\/td>9,5\u00b10,2 (2)<\/td> <\/td> <\/td><\/tr>
Fisk\u00e1<\/td>11<\/td>4,8\u00b10,9 (4)<\/td>11,3\u00b10,8 (2)<\/td>5,3\u00b10,6 (12)<\/td> <\/td> <\/td>9,3 (1)<\/td><\/tr>
Fisk\u00e1<\/td>10<\/td>4,8 (1)<\/td> <\/td>5,7\u00b10,3 (3)<\/td> <\/td>5,6\u00b10,5<\/td> <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

100<\/p>\n\n\n\n

<\/a>Mynd 6. <\/strong>F\u00e6\u00f0a sei\u00f0a eftir tegungum \u00ed Eystri-Rang\u00e1 og Fisk\u00e1. N er fj\u00f6ldi og F er me\u00f0almagafylli.<\/em><\/p>\n\n\n\n

F\u00e6\u00f0a sei\u00f0anna var a\u00f0allega lirfur rykm\u00fds. Einnig voru lirfur bitm\u00fds \u00e1berandi. Voru \u00feetta einu f\u00e6\u00f0uger\u00f0irnar sem fundust \u00ed m\u00f6gum sei\u00f0a \u00far Eystri-Rang\u00e1 (mynd 6). Laxasei\u00f0i (N=1) \u00far Eyrtri-Rang\u00e1 var me\u00f0 bitm\u00fdslirfur (55%) og rykm\u00fdslirfur (45%) \u00ed maga \u00ed maga. F\u00e6\u00f0a sei\u00f0a \u00ed Fisk\u00e1 var fj\u00f6lbreyttari en \u00fear fundust vatnabobbar, vorflugulirfur, \u00e1nar og tv\u00edv\u00e6gjulirfur \u00ed laxasei\u00f0um auk fyrrnefndra d\u00fdrah\u00f3pa (mynd 6). Bleikja (N=1) sem veiddist \u00ed Fisk\u00e1 var me\u00f0 bitm\u00fdslirfur (70%) og rykm\u00fdslirfur (30%) \u00ed maga.<\/p>\n\n\n\n

<\/a>Umr\u00e6\u00f0a.<\/h2>\n\n\n\n

\u00datbrei\u00f0sla tegunda laxfiska kom gl\u00f6ggt fram \u00ed sei\u00f0aranns\u00f3knunum. Laxasei\u00f0i var helst a\u00f0 finna \u00ed Fisk\u00e1 og \u00e1 ne\u00f0stu st\u00f6\u00f0 \u00ed Eystri-Rang\u00e1. Bleikjusei\u00f0i voru hins vegar r\u00edkjandi efst \u00ed Eystri-Rang\u00e1 \u00fear sem \u00e1rvatni\u00f0 er kaldast a\u00f0 sumarlagi. Urri\u00f0asei\u00f0i voru jafnt \u00ed Fisk\u00e1 sem \u00ed Eystri-Rang\u00e1 ne\u00f0an Fisk\u00e1r.<\/p>\n\n\n\n

Samanbur\u00f0ur \u00e1 \u00fatbrei\u00f0slu og \u00fe\u00e9ttleika sei\u00f0a fr\u00e1 fyrri k\u00f6nnun \u00e1ri\u00f0 1997 er athygliver\u00f0ur. S\u00e9 me\u00f0al\u00fe\u00e9ttleiki sei\u00f0a \u00e1 samb\u00e6rilegum st\u00f6\u00f0vum borinn saman kemur \u00ed lj\u00f3s a\u00f0 me\u00f0al\u00fe\u00e9ttleiki bleikjusei\u00f0a \u00ed Eystri-Rang\u00e1 er n\u00e1nast s\u00e1 sami og \u00e1ri\u00f0 1997, var 8,5 en er n\u00fa 8,3 sei\u00f0i\/100 m2<\/sup> (Magn\u00fas J\u00f3hannsson og \u00de\u00f3r\u00f3lfur Antonsson 1998). Dreifing bleikjusei\u00f0anna hefur hins vegar breyst, minna fannst af \u00feeim n\u00fa vi\u00f0 Tungufoss og L\u00f3ut\u00fan en meira vi\u00f0 Bergsnef. \u00de\u00e9ttleiki urri\u00f0asei\u00f0a \u00ed Eystri-Rang\u00e1 var hins vegar mun meiri \u00ed \u00feessari ranns\u00f3kn en \u00e1ri\u00f0 1997. Me\u00f0al\u00fe\u00e9ttleikinn var n\u00fa 9,1 en var 2,7 sei\u00f0i\/100 m2<\/sup> \u00e1ri\u00f0 1997. Me\u00f0al\u00fe\u00e9ttleiki laxasei\u00f0a haf\u00f0i aukist \u00ed Eystri-Rang\u00e1 m\u00e6ldist n\u00fa 6,7 en var einungis 1,1 sei\u00f0i\/100 m2<\/sup> \u00ed fyrri k\u00f6nnun. Ef liti\u00f0 er til hlutar laxasei\u00f0a af heildar\u00fe\u00e9ttleika sei\u00f0a \u00ed Eystri-Rang\u00e1 haf\u00f0i hann ekki vaxi\u00f0 miki\u00f0 var 8,9% \u00e1ri\u00f0 1997 en 10,3% \u00ed \u00feessari k\u00f6nnun. Erfi\u00f0ara er a\u00f0 bera saman ni\u00f0urst\u00f6\u00f0urnar \u00ed Fisk\u00e1 \u00fear sem ekki var veitt \u00e1 s\u00f6mu st\u00f6\u00f0vum b\u00e6\u00f0i \u00e1rin. Helst er h\u00e6gt a\u00f0 bera saman st\u00f6\u00f0 sem veidd var vi\u00f0 va\u00f0 \u00e1ri\u00f0 1997 og st\u00f6\u00f0 nr. 11 \u00ed \u00feessari ranns\u00f3kn. \u00de\u00e9ttleiki urri\u00f0asei\u00f0a m\u00e6ldist n\u00fa 16,3 en 3,8 sei\u00f0i\/100m2<\/sup> \u00ed fyrri k\u00f6nnun. \u00de\u00e9ttleiki laxasei\u00f0a var n\u00fa 7,7 en var 15,1 sei\u00f0i\/100 m2<\/sup> \u00e1ri\u00f0 1997. Hafa ber \u00ed huga a\u00f0 \u00e1ri\u00f0 1997 voru flest laxasei\u00f0in n\u00e6r eing\u00f6ngu \u00e1 fyrsta \u00e1ri (0+) en sei\u00f0in sem veiddust n\u00fa voru b\u00e6\u00f0i \u00e1 fyrsta og \u00f6\u00f0ru \u00e1ri. Hlutfall laxasei\u00f0a \u00e1 umr\u00e6ddum st\u00f6\u00f0vum var 73% \u00e1ri\u00f0 1997 en 32% n\u00fa.<\/p>\n\n\n\n

Sei\u00f0af\u00e6\u00f0 laxa \u00e1 fyrsta \u00e1ri \u00e1ri\u00f0 2013 getur stafa\u00f0 af l\u00edtilli hrygningu \u00e1ri\u00f0 \u00e1\u00f0ur en \u00fe\u00e1 voru heimtur laxa l\u00e9legar \u00e1 vatnasv\u00e6\u00f0i Eystri-Rang\u00e1r (Einar L\u00fa\u00f0v\u00edksson munnl. uppl.). Sta\u00f0a silungastofnanna \u00e6tti einnig a\u00f0 koma fram \u00ed vei\u00f0inni, en samdr\u00e1ttur kemur fram \u00ed sj\u00f3birtingsvei\u00f0inni s\u00e9rstaklega eftir 2007. Bleikjuvei\u00f0in hefur einnig dregist saman en ekki eins miki\u00f0. Engu a\u00f0 s\u00ed\u00f0ur benda sei\u00f0aranns\u00f3knir 1997 og 2013 ekki til \u00feess a\u00f0 lax hafi yfirteki\u00f0 b\u00fasv\u00e6\u00f0i \u00e1 kostna\u00f0 silungssei\u00f0a \u00ed Fisk\u00e1 og Eystri-Rang\u00e1 \u00e1 \u00feessu t\u00edmabili \u00fer\u00e1tt fyrir miklar \u00e1rlega sleppingar laxag\u00f6ngusei\u00f0a sem lei\u00f0a af s\u00e9r aukinn hrygningarstofn lax. Hafa ber \u00ed huga a\u00f0 \u00feegar ranns\u00f3kn var ger\u00f0 \u00e1ri\u00f0 1997 h\u00f6f\u00f0u sleppingar laxag\u00f6ngusei\u00f0a sta\u00f0i\u00f0 \u00ed ein sj\u00f6 \u00e1r (Magn\u00fas J\u00f3hannsson og Gu\u00f0ni Gu\u00f0bergsson 1990, Magn\u00fas J\u00f3hannsson og \u00de\u00f3r\u00f3lfur Antonsson 1998), svo hlutfall tegunda \u00ed sei\u00f0auppeldi \u00e1nna getur \u00fe\u00e1 \u00feegar hafa breyst fr\u00e1 \u00fev\u00ed sem var vi\u00f0<\/p>\n\n\n\n

\u201en\u00e1tt\u00farulegar\u201c a\u00f0st\u00e6\u00f0ur. Vert v\u00e6ri a\u00f0 sko\u00f0a sei\u00f0ab\u00faskapinn \u00e1 fleiri st\u00f6\u00f0um \u00ed \u00e1num.<\/p>\n\n\n\n

Vaxtarhra\u00f0i fiska fylgir hitastigi sem og f\u00e6\u00f0uskilyr\u00f0um. Tilraunir \u00ed eldi hafa s\u00fdnt a\u00f0 kj\u00f6rv\u00f6xtur 4-12 g laxasei\u00f0a ver\u00f0ur kringum 18-19 \u00b0C og 13 \u00b0C hj\u00e1 40-60 gramma g\u00f6ngusei\u00f0um (Handeland o.fl. 2008), en v\u00f6xtur er h\u00e6gari \u00feegar hitastig er h\u00e6rra e\u00f0a l\u00e6gra vi\u00f0 st\u00f6\u00f0ugt f\u00e6\u00f0uframbo\u00f0. Sl\u00edkar a\u00f0st\u00e6\u00f0ur bj\u00f3\u00f0ast \u00fe\u00f3 sjaldnast vi\u00f0 n\u00e1tt\u00farulegar a\u00f0st\u00e6\u00f0ur. Tegundasamsetning og sei\u00f0a\u00feroski r\u00e6\u00f0st af \u00fev\u00ed hvernig l\u00edfsskilyr\u00f0in eru fyrir vi\u00f0komandi tegund og af a\u00f0gengi stofna til og fr\u00e1 sj\u00f3. St\u00e6r\u00f0 sei\u00f0a eftir aldri og \u00fe\u00e9ttleika gefur hugmynd um vaxtarskilyr\u00f0i \u00e1 vi\u00f0komandi sta\u00f0. Athygli vekur hversu st\u00f3r laxasei\u00f0i \u00e1 \u00f6\u00f0ru \u00e1ri (1+) voru \u00ed Fisk\u00e1, voru flest um og yfir 10 cm l\u00f6ng. Laxasei\u00f0i ganga til sj\u00e1var a\u00f0 vori \u00feegar \u00e1kve\u00f0inni st\u00e6r\u00f0 er n\u00e1\u00f0, a\u00f0 l\u00e1gmarki um 10 cm. St\u00f3r sei\u00f0i mei\u00f0a\u00f0 vi\u00f0 aldur gefur til kynna g\u00f3\u00f0 vaxtarskilyr\u00f0i \u00ed Fisk\u00e1 og a\u00f0 laxasei\u00f0in fari \u00fear flest til sj\u00e1var sem 2ja \u00e1ra sem er \u00fea\u00f0 yngsta sem gerist \u00ed \u00e1m h\u00e9r \u00e1 landi (Gu\u00f0ni Gu\u00f0bergsson og \u00de\u00f3r\u00f3lfur Antonsson 1996) en Me\u00f0alst\u00e6r\u00f0<\/p>\n\n\n\n

jafngamalla sei\u00f0a var meiri \u00ed Fisk\u00e1 en \u00ed Eystri-Rang\u00e1 sem bendir til betri vaxtarskilyr\u00f0a \u00ed Fisk\u00e1 sem sennilega stafar af h\u00e6rri vatnshita \u00fear. Vatnshitam\u00e6lingar eru fremur f\u00e1ar af vatnasv\u00e6\u00f0inu. M\u00e6lingar benda \u00fe\u00f3 til \u00feess a\u00f0 vatnshiti breytist me\u00f0 lofthita \u00ed Fisk\u00e1 og h\u00fan n\u00e1i \u00fev\u00ed a\u00f0 hl\u00fdna a\u00f0 sumarlagi \u00e1 vaxtart\u00edma sei\u00f0anna, l\u00edkt og almennt gerist \u00ed drag\u00e1m. Eystri-Rang\u00e1 vir\u00f0ist hins vegar fremur k\u00f6ld a\u00f0 sumarlagi, einkum ofantil n\u00e6r vart meira en 6-7 \u00b0C a\u00f0 sumarlagi (Teitur Arnlaugsson 1974). G\u00e6ti dreifing laxasei\u00f0a \u00ed \u00e1nni endurspegla\u00f0 hitaferil \u00e1rinnar, laxinn velur s\u00e9r sv\u00e6\u00f0i \u00fear sem \u00e1rvatni\u00f0 er n\u00e6gilega hl\u00fdtt til a\u00f0 hann geti \u00ferifist (Magn\u00fas J\u00f3hannsson og \u00de\u00f3r\u00f3lfur Antonsson 1998). Urri\u00f0inn og \u00fe\u00f3 s\u00e9rstaklega bleikjan geta \u00ferifist vi\u00f0 l\u00e6gra hitastig en laxinn.<\/p>\n\n\n\n

Var\u00f0andi laxaframlei\u00f0slu \u00e1 vatnasv\u00e6\u00f0inu ber a\u00f0 hafa \u00ed huga a\u00f0 h\u00fan er a\u00f0 mestu tilkomin vegna sleppinga laxasei\u00f0a og e.t.v. vi\u00f0haldi\u00f0 me\u00f0 \u00feeim h\u00e6tti. Um er a\u00f0 r\u00e6\u00f0a a\u00f0flutta stofna, mest hafbeitarstofna. Reikna m\u00e1 me\u00f0 a\u00f0 \u00feeir s\u00e9u ver a\u00f0laga\u00f0ir n\u00e1tt\u00farulegum a\u00f0st\u00e6\u00f0um \u00ed \u00e1num en stofnar sem veri\u00f0 hafa lengi (margar aldir) \u00ed tilteknu vatnakerfi. \u00deess vegna getur hrygning og uppeldi \u00ed n\u00e1tt\u00farunni veri\u00f0 \u00feeim erfi\u00f0 og breytilegt milli \u00e1ra eftir \u00fev\u00ed hvernig til tekst. Eins geta aff\u00f6ll veri\u00f0 mikil milli \u00e1ra, \u00fe.e. miki\u00f0 magn sm\u00e1sei\u00f0a \u00fearf ekki a\u00f0 vera \u00e1v\u00edsun \u00e1 mikinn fj\u00f6lda g\u00f6ngusei\u00f0a.<\/p>\n\n\n\n

Nokkur framlei\u00f0sla n\u00e1tt\u00farlegra laxasei\u00f0a vir\u00f0ist \u00e1 sv\u00e6\u00f0inu og sennilega er h\u00fan miki\u00f0 bundin vi\u00f0 Fisk\u00e1 og hugsanlega ne\u00f0ri sv\u00e6\u00f0i Eystri-Rang\u00e1r. \u00c1hugavert v\u00e6ri a\u00f0 gera frekari k\u00f6nnun \u00e1 sei\u00f0ab\u00faskap ofar \u00ed Fisk\u00e1 og \u00e1 ne\u00f0ri sv\u00e6\u00f0um \u00ed Eyrtri-Rang\u00e1 til a\u00f0 kortleggja betur \u00fatbrei\u00f0slu sei\u00f0a og hvar lax hefur n\u00e1\u00f0 f\u00f3tfestu. Me\u00f0 \u00fev\u00ed a\u00f0 safna hreistri af veiddum laxi til greiningar \u00e1 aldri og uppruna m\u00e1 komast a\u00f0 \u00fev\u00ed hver hlutur n\u00e1tt\u00farulegar framlei\u00f0slu laxa er \u00ed vei\u00f0i.<\/p>\n\n\n\n

<\/a>\u00deakkaror\u00f0<\/h2>\n\n\n\n

\u00de\u00f3r\u00f3lfi Antonssyni eru f\u00e6r\u00f0ar \u00feakkir fyrir yfirlestur sk\u00fdrslunnar \u00ed handriti.<\/p>\n\n\n\n

<\/a>Heimildir<\/h2>\n\n\n\n

Gu\u00f0ni Gu\u00f0bergsson 2013. Lax- og silungsvei\u00f0in \u00e1ri\u00f0 2012. Vei\u00f0im\u00e1lastofnun VMST\/13039: 37 bls.<\/p>\n\n\n\n

Gu\u00f0ni Gu\u00f0bergsson og Magn\u00fas J\u00f3hannsson 1991.  Vei\u00f0in \u00ed Rang\u00e1num 1990.     Vei\u00f0im\u00e1lastofnun, VMST-R\/91003: 11 bls.  Einnig, Freyr 1991 (3): 115-119.<\/p>\n\n\n\n

Gu\u00f0ni Gu\u00f0bergsson og \u00de\u00f3r\u00f3lfur Antonsson 1996.      Fiska \u00ed \u00e1m og v\u00f6tnum.       Fr\u00e6\u00f0irit fyrir almenning um ferskvatnsfiska.     Landvernd: 191 bls.<\/p>\n\n\n\n

Magn\u00fas J\u00f3hannsson 2013. Ums\u00f6gn um framkv\u00e6mdir vi\u00f0 Eystri-Rang\u00e1 og Fisk\u00e1. Br\u00e9f dagsett 15. okt\u00f3ber 2013: 5 bls.<\/p>\n\n\n\n

Magn\u00fas J\u00f3hannsson og \u00de\u00f3r\u00f3lfur Antonsson 1998. Mat \u00e1 b\u00fasv\u00e6\u00f0um fyrir laxfiska \u00e1 vatnasv\u00e6\u00f0i Eystri-Rang\u00e1r.<\/p>\n\n\n\n

Vei\u00f0im\u00e1lastofnun, VMST-S\/98002X: 21 bls.<\/p>\n\n\n\n

Magn\u00fas J\u00f3hannsson og Gu\u00f0ni Gu\u00f0bergsson 1991a.     \u00c1rangur g\u00f6ngusei\u00f0asleppinga \u00e1 vatnasv\u00e6\u00f0i Rang\u00e1nna.<\/p>\n\n\n\n

Vei\u00f0im\u00e1lastofnun, VMST-S\/91001: 26 bls.<\/p>\n\n\n\n

Magn\u00fas J\u00f3hannsson og Gu\u00f0ni Gu\u00f0bergsson 1991b.          Rang\u00e1rnar:      Metvei\u00f0i ger\u00f0 af mannah\u00f6ndum.<\/p>\n\n\n\n

\u00c1rangur  g\u00f6ngusei\u00f0asleppinga \u00e1 vatnasv\u00e6\u00f0i Rang\u00e1nna. Vei\u00f0ima\u00f0urinn 139: 46-49.<\/p>\n\n\n\n

Magn\u00fas J\u00f3hannsson, \u00c1rni \u00cdsaksson, \u00der\u00f6stur Elli\u00f0ason & Sumarli\u00f0i \u00d3skarsson, 1996. Maintenance of angling through smolt releases in the Rang\u00e1 river in sothern Iceland. ICES CM 1996\/M:6: 13 bls<\/p>\n\n\n\n

Sigurd O. Handeland, Albert K. Imsland og Sigurd O. Stefansson 2008. The effect of temperature and fish growth, feed intake, food conversion efficiency and stomach evacuation rate of Atlantic salmon post-smolts. Aquaculture 283:36-42.<\/p>\n\n\n\n

Sigur\u00f0ur Gu\u00f0j\u00f3nsson 1990. \u00cdslensk v\u00f6tn, vistfr\u00e6\u00f0ileg flokkun \u00feeirra. Vatni\u00f0 og landi\u00f0: 219-233. Sigurj\u00f3n Rist 1969.  Vatnasvi\u00f0 \u00cdslands. Orkustofnun -Vatnam\u00e6lingar, Reykjav\u00edk: 127 bls.<\/p>\n\n\n\n

Sigurj\u00f3n Rist 1990.  Vatns er \u00fe\u00f6rf.  B\u00f3ka\u00fatg\u00e1fa Menningarsj\u00f3\u00f0s, Reykjav\u00edk: 247 bls.<\/p>\n\n\n\n

Teitur Arnlaugsson 1974. Athuganir \u00e1 \u00e1m \u00ed Rang\u00e1rvallas\u00fdslu. H\u00f3ls\u00e1, Ytri-Rang\u00e1, Hr\u00f3arsl\u00e6kur, Eystri-Rang\u00e1, Fisk\u00e1, \u00dever\u00e1. Vei\u00f0im\u00e1lastofnun, sk\u00fdrsla : 33 bls.<\/p>","protected":false},"excerpt":{"rendered":"

VMST\/14018 Sei\u00f0aranns\u00f3knir \u00ed Eystri-Rang\u00e1 og Fisk\u00e1 \u00e1ri\u00f0 2013 Magn\u00fas J\u00f3hannsson og Ben\u00f3n\u00fd J\u00f3nsson Vei\u00f0im\u00e1lastofnun Vei\u00f0in\u00fdting   \u2022    L\u00edfr\u00edki \u00ed \u00e1m og v\u00f6tnum   \u2022    Ranns\u00f3knir   \u2022    R\u00e1\u00f0gj\u00f6f Fors\u00ed\u00f0umynd: Fisk\u00e1 vi\u00f0 glj\u00fafurmynni Mynd: Magn\u00fas J\u00f3hannsson VMST\/14018 Sei\u00f0aranns\u00f3knir \u00ed Eystri-Rang\u00e1 og Fisk\u00e1 \u00e1ri\u00f0 2013 Magn\u00fas J\u00f3hannsson og Ben\u00f3n\u00fd J\u00f3nsson Unni\u00f0 fyrir Vei\u00f0if\u00e9lag Eystri-Rang\u00e1r EFNISYFIRLIT Bls. 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