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Teljarinn-29jul2014-1
Yfir sumart√≠mann m√° fylgjast me√į g√∂ngum fiska um teljarann
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P1090169
Teljarinn er sta√įsettur √° m√≥ts vi√į
virkjunina √≠ Elli√įa√°rdalnum √≠ Reykjav√≠k

Laxfiskar with 2 presentations at the annual meeting of the International Council for the Exploration of the Sea (ICES) 

This week the Annual meeting of ICES is ongoing in Harpa Concert Hall and Conference Center in Reykjavik Iceland.  Number of scientists attending the meeting are close to 700 and the number of presentations are roughly 450. Among them are 2 that Johannes Sturlaugsson at the research company Laxfiskar will present.  One of them is revealing what knowledge was received from the first study on migration of Atlantic cod  using Pop-up Satellite Archival Tags (PSATs) to follow up their migration routes, behaviour and predation on them. The other one is presenting the first behavioural data on individual basis in Iceland on Atlantic wolffish from a study where geographical mapping of movements of these fish in the fjord Hvalfjord was included. That monitoring showed for example that during the study period the same wolffish individuals entered the fjord during the feeding migration period repeatedly , for up to 3 years in a row. This verified that wolffish in that area have what could be called a home feeding grounds.

It is possible to see the PowerPoint part of those presentations, for the cod study here and for the wolffish study here.

ICES-logo             

The Brown Trout in Lake √ěingvallavatn on Animal Planet¬īs - River Monsters May 27th 

The final episode in series 5 of River Monsters was partly filmed in Iceland last summer among other places at Lake Thingvallavatn. There the brown trout of Lake Thingvallavatn is introduced and the studies carried out on him by the research company Laxfiskar.

 

The most popular TV series on Animal Planet

In the River Monsters series the biologist and host of the program Jeremy Wade travels all over the world in order to catch giant fish to introduce them. When visiting Iceland Jeremy and his co-workers from  Icon Films were searching  for a material to use in an episode where the topic was the Scottish Loch Ness Monster. Therefore they decided to visit the most known Icelandic relative of the Loch Ness, the giant worm monster in River Lagarfljot.

Jeremy_Wade_-_Icon_film_team-Johannes_Sturlaugsson-_Erlendur_Geirdal-Laxfiskar

Jeremy Wade in the middle in dry suit and the filming crew from  Icon Films along with Erlendur Geirdal and Johannes Sturlaugsson from Laxfiskar

 

Meeting with the king

The stories of the big brown trout in Lake Thingvallavatn drew  the attention of the River Monster Team, and they decide to pay the king of Icelandic freshwater fishes a visit when visiting Iceland.  These stories were the reason for the appearance of the brown trout and his amazing habitat of Lake Thingvallavatn in the Loch Ness episode of River Monster. This gives people all around  the world an insight into the life of this descendant of the sea trout that inwaded the area following last ice age. As the land rose and the weight of the ice capsule was released from the land, the brown trout in Lake Thingvallavatn area got landlocked as they could not carry out the feeding migration to sea as the waterfalls got to high to pass.

 

Jeremy_Wade_Johannes_Sturlaugsson_Laxfiskar

Johannes Sturlaugsson and Jeremy Wade

 

The brown trout in Lake Thingvallavatn, the living myth

When Jeremy and co-workers visited  the brown trout in Lake Thingvallavatn last midsummer, most of the bigger fish were dispersed in outer areas of Lake Thingvallavatn. Despite that they had the opportunity to meet the beautiful trout, although the troll version of the trout  was not met at that time.  The brown trout in Lake Thingvallavatn is a living myth and the River Monster episode now brings forward bits of his stories, his life habits, behavior and faith.

There are no translations available.

Magna√įur sei√įab√ļskapur √≠ Elli√įa√°num 2012 - Sk√Ĺrsla um ni√įurst√∂√įur fiskiranns√≥knanna 2012 komin √ļt

Ranns√≥knir Laxfiska √° laxi og silungi √≠ vatnakerfi Elli√įa√°nna 2012 fyrir Stangavei√įif√©lag Reykjav√≠kur s√Ĺndi gott √°stand fiskistofnanna og v√∂ktun √° hitafari √°nna endurspegla√įi gott t√≠√įarfar.

 

Elli√įa√°rnar kraumu√įu af sumarg√∂mlum sei√įum

Sei√įab√ļskapur √≠ vatnakerfi Elli√įa√°nna var einstaklega g√≥√įur hausti√į 2012 √ĺv√≠ af 1940 sei√įum veiddust 1513 laxasei√įi og 427 urri√įasei√įi. Fj√∂ldi sumargamalla laxasei√įa √≠ √°num hausti√į 2012 var meiri en nokkru sinni hefur s√©st vi√į sei√įaranns√≥knir √≠ Elli√įa√°num. √ě√©ttleiki √ĺeirra var sj√∂faldur mi√įa√į vi√į me√įaltal 27 vi√įmi√įunar√°ra (1981-1982 og 1987-2011) og helmingi meiri en mest hefur or√įi√į √° √ĺessum √°rum. Fj√∂ldi √°rsgamalla sei√įa var einnig mj√∂g g√≥√įur √ĺv√≠ √ĺ√©ttleiki √ĺeirra var helmingi meiri en me√įaltalsfj√∂ldi √ĺeirra umr√¶dd vi√įmi√įunar√°r og me√į √ĺv√≠ mesta sem s√©st hefur √° √ĺeim t√≠ma. Tveggja √°ra sei√įi reyndust r√©tt r√≠flega yfir me√įaltali vi√įmi√įunar√°ranna.

 

Margur er kn√°r √ĺ√≥ hann s√© sm√°r

Kyn√ĺroska h√¶ngar me√į rennandi svil voru 38 √° me√įal eins og tveggja √°ra laxasei√įanna sem rafveidd voru hausti√į 2012. Minnsti h√¶ngurinn var einungis 7,3 cm a√į lengd og 4,8 g a√į √ĺyngd en st√¶rsti sei√įah√¶ngurinn 14, 8 cm (41,5 g). √ěegar liti√į er til √ĺeirra sei√įa sem veiddust √≠ rafvei√įunum sem n√°√į h√∂f√įu 7 cm √≠ lengd e√įa meira √ĺ√° f√¶st a√į kyn√ĺroska h√¶ngsei√įin voru 10% af fj√∂lda √ĺeirra. H√¶ngar sem kyn√ĺroskast √° sei√įastigi berjast ekki um hrygnurnar l√≠kt og √ĺeir sj√≥gengnu og skyldi engan undra. Ef teki√į mi√į af minnsta kyn√ĺroska h√¶ngnum fr√° vei√įinni 2012 √ĺ√° er hann 600 sinnum l√©ttari en pattaralegur 3 kg sm√°laxah√¶ngur og 1600 sinnum l√©ttari en 8 kg st√≥rlaxah√¶ngur. √ě√≥ einungis v√¶ri teki√į mi√į af sm√°laxinum √ĺ√° v√¶ri saml√≠king vi√į 100 kg karlmann s√ļ a√į hann √ĺyrfti a√į etja kappi vi√į 60 tonna risa um hylli kvenna. Af √ĺessum s√∂kum byggja kyn√ĺroska h√¶ngsei√įi sinn √°rangur √≠ √°stam√°lum √° √ĺv√≠ a√į laumast og eru √ĺv√≠ gjarnan nefnd laumarar. √ěv√≠ minni sem kyn√ĺroska h√¶ngsei√įi eru √ĺv√≠ l√≠klegra er a√į √ĺau geti fundi√į fylgsni n√°l√¶gt hrygnu √°n √ĺess a√į sj√≥gengnu h√¶ngarnir ver√įi √ĺeirra varir og s√≥pi √ĺeim √≠ burtu. S√≠√įan √ĺarf bara a√į b√≠√įa eftir √ĺv√≠ a√į sm√°- e√įa st√≥rlaxah√¶ngur komi hrygnunni til og nota √ĺ√° t√¶kif√¶ri√į og sprauta s√≠num sviljum √≠ p√ļkki√į. S√© hinsvegar enginn sj√≥genginn h√¶ngur til taks √ĺ√° hafa ranns√≥knir s√Ĺnt a√į kyn√ĺroska h√¶ngar √° sei√įastigi geta komi√į hrygnunum til einir s√≠ns li√įs. 

 

Metvei√įi √≠ Elli√įa√°num 2015?

S√° gr√≠√įarlegi fj√∂ldi sumargamalla laxasei√įa sem var √≠ vatnakerfi Elli√įa√°nna hausti√į 2012 vekur vonir um mj√∂g sterkan g√∂ngusei√įastofn 2014 √ĺegar a√į megni√į af √ĺeim sei√įum gengur v√¶ntanlega √≠ sj√≥. √ěetta getur or√įi√į raunin ef skilyr√įi til uppvaxtar sei√įanna ver√įa √ĺeim hli√įholl fram a√į sj√≥g√∂ngunni og afr√°n √° √ĺeim √≠ √°num ekki umfram venju. Ef svona f√¶ri √ĺ√° yr√įi vei√įisumari√į 2015 l√≠flegt √≠ Elli√įa√°num og √ĺa√į √≠ meira lagi ef l√≠fsskilyr√įi laxins √≠ sj√≥ 2014-2015 ver√įa g√≥√į. Magn eins og tveggja √°ra laxasei√įa hausti√į 2012 gefur einnig fyrirheit um a√į stofn g√∂ngusei√įanna 2013 ver√įi umfram me√įallag.

 

G√∂ngusei√įin 2012

V√∂ktun √° g√∂ngu g√∂ngusei√įa laxins til sj√°var √≠ ma√≠ og j√ļn√≠ s√Ĺndi a√į √ļtgangan var r√≥leg framan af ma√≠ vegna kulda en n√°√įi s√≠√įan h√°marki 23. ma√≠ √ĺegar t√¶p 500 sei√įi gengu √ļt √° einum s√≥larhring sem samsvara√įi r√≠flega 23% af √ĺeim sei√įum sem veidd voru 2012 √° lei√į √ĺeirra til sj√°var. Alls voru veidd 2147 g√∂ngusei√įi √≠ sei√įagildruna og √ĺar af voru 2051 sei√įi merkt me√į √∂rmerkjum. Megni√į af g√∂ngusei√įunum gengu √ļt 21.-25. ma√≠ e√įa 57% m√¶ldrar g√∂ngu en s√≠√įan kom minni toppur √≠ √ļtg√∂nguna 28.-31. ma√≠ √ĺegar 20% g√∂ngusei√įanna veiddust. G√∂ngusei√įin voru flest tveggja √°ra (63%) en √ĺriggja √°ra sei√įi voru 36% af g√∂ngunni og fj√∂gurra √°ra sei√įi einungis 1%. Yfir v√∂ktunart√≠mabil √ļtg√∂ngunnar 15. ma√≠ - 6. j√ļn√≠ var m√¶lanlegur fallandi √≠ st√¶r√į sei√įanna √ĺannig a√į st√¶rst voru sei√įin a√į jafna√įi √≠ upphafi g√∂ngunnar og √ĺau minnstu √≠ lok hennar. G√∂ngusei√įastofninn 2011 er st√≥√į a√į baki sm√°laxag√∂ngunni 2012 reikna√įist um 15 √ĺ√ļsund sei√įi og var √ĺv√≠ undir me√įaltali v√∂ktunar√°ranna 1988-2011 sem er r√≠flega 19 √ĺ√ļsund g√∂ngusei√įi. √ěessi stofnst√¶r√į g√∂ngusei√įanna sem var 43% minni en g√∂ngusei√įastofninn sem st√≥√į a√į baki g√∂ngunni 2011 endurspegla√įist √≠ vei√įinni 2012.

 

G√∂ngur lax og urri√įa 2012

G√∂ngur lax og silungs √≠ Elli√įa√°rnar voru vakta√įar yfir t√≠mabili√į 19. j√ļn√≠ -17. september me√į kvikmyndafiskteljara √≠ Austurkv√≠sl √°nna en enginn fiskur gat √ĺ√≥ gengi√į upp fyrir teljaragir√įinguna fr√° √ĺv√≠ a√į g√∂ngusei√įav√∂ktunin h√≥fst 15. ma√≠. Alls gengu 1294 laxar √≠ √°rnar 2012 en √ĺar af veiddust 342 laxar ne√įan teljarans. Urri√įar sem gengu upp teljarann 2012 voru 406, a√į mestu sj√≥birtingar. Miki√į var af uppvaxandi sj√≥birtingi √ĺv√≠ helmingur af g√∂ngunni var undir 30 cm a√į lengd en urri√įarnir sem komnir voru √≠ vei√įist√¶r√į voru sumir mj√∂g v√¶nir √ĺv√≠ um 5% √ĺeirra voru 60-80 cm langir. Uppista√įa hrygningarg√∂ngu laxins var a√į vanda sm√°laxar sem voru 1254 a√į t√∂lu e√įa um 97% g√∂ngunnar. St√¶rsti laxinn sem f√≥r um teljarann 2012 var 94 cm langur. Endurheimtuhlutfall √∂rmerktra sm√°laxa var 8,3% sem er r√©tt undir 8,6% me√įalheimtum sm√°laxa v√∂ktunar√°ranna 1989-2012. √ěessi lifitala laxins yfir sj√°varg√∂nguna sk√Ĺrir √ĺv√≠ minna af fr√°vikinu fr√° me√įal√°standi laxgengdarinnar en g√∂ngusei√įastofninn. Lax gekk af miklum krafti snemmsumars sem sj√° m√° af √ĺv√≠ a√į 50% af laxag√∂ngunni haf√įi skila√į s√©r 7. j√ļl√≠. En til samanbur√įar var helmingur urri√įanna sem a√į mestu voru sj√≥birtingar genginn um teljarann 16. √°g√ļst. Sj√≥birtingurinn var enn a√į ganga 17. september √ĺegar teljarinn var tekinn upp en s√≠√įustu laxarnir sem f√≥ru um teljarann voru √ĺar fyrstu vikuna √≠ september.

 

G√∂ngurnar me√į hli√įsj√≥n af t√≠ma s√≥lahrings

Laxinn gekk mest upp √°na √≠ h√ļminu √ĺegar s√≥l var sest. Af g√∂ngunni 2012 gekk 57% laxins upp fiskteljarann √° fyrstu 2 klukkustundunum eftir mi√įn√¶tti, 77% af laxinum haf√įi gengi√į upp fyrstu 5 klukkut√≠ma s√≥larhringsins og 10% gekk a√į kveldinu s√≠√įustu 2 klukkustundir s√≥larhringsins. Fer√įatilh√∂gunin √≠ g√∂ngum urri√įanna var samb√¶rileg me√į hli√įsj√≥n af t√≠ma s√≥larhrings.

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There are no translations available.

Gervitunglag√∂gn yfir fiskig√∂ngur grundv√∂llur √ĺj√≥nustu vi√į √ļtger√įar- og ranns√≥knaa√įila

Greinin birtist í Fiskifréttum 27. mars 2013

√ěr√≥unarverkefni skapar n√Ĺtt fiskleitar√ļrr√¶√įi

Gervitunglafiskmerki gera kleift a√į fylgjast me√į fer√įum fiska og safna uppl√Ĺsingum um atferli √ĺeirra og umhverfi √°n √ĺess a√į sl√≠kt √ļtheimti a√į fiskarnir s√©u endurveiddir. Ranns√≥knafyrirt√¶ki√į Laxfiskar innleiddi 2011 notkun √ĺessara merkja √≠ fiskiranns√≥knum h√©r vi√į land og √≠ √ĺeirri vinnu komum vi√į auga √° t√¶kif√¶ri sem felst √≠ √ĺv√≠ a√į n√Ĺta √ĺessa fjark√∂nnunart√¶kni til a√į auka hagkv√¶mni fiskvei√įa samhli√įa √ĺv√≠ a√į afla n√Ĺrrar hagn√Ĺtrar √ĺekkingar. Grundv√∂llur √ĺess er a√į n√Ĺta sem vi√įmi√į vi√į fiskvei√įar n√°v√¶m landfr√¶√įileg g√∂gn fr√° fer√įum merktra fiska sem afla√į er um gervitungl. Sl√≠kar uppl√Ĺsingar auka s√≥knarf√¶ri √≠ fiskvei√įum b√¶√įi innan og utan √ĺekktra vei√įisv√¶√įa og gera f√¶rt a√į draga √ļr ol√≠ukostna√įi vi√į vei√įarnar. √ör var√į a√į vi√į settum upp √ĺr√≥unarverkefni til a√į fylgja √ĺeirri hugmynd eftir sem n√ļ er unni√į a√į √ĺv√≠ a√į fj√°rmagna me√į styrkums√≥knum √≠ ranns√≥knasj√≥√įi. Hugmyndin var kynnt fyrir √ļtger√įarfyrirt√¶kjunum Brim, HB Granda og √Ėgurv√≠k sem √¶tla a√į taka √ĺ√°tt √≠ verkefninu me√į √ĺv√≠ a√į leggja til pr√≥fanir √° a√įfer√įafr√¶√įinni. Auk √ĺeirra taka √ĺ√°tt √≠ verkefninu √Ārni Geir P√°lsson vi√įskiptafr√¶√įingur og Gu√įmundur Geirdal sem gerir √ļt b√°tinn G√≠sla K√ď 10 en hann hefur um nokkura √°ra skei√į unni√į me√į Laxfiskum a√į ranns√≥knum √° sj√°varfiskum.

√ěr√≥un √° v√∂ktunar√ĺj√≥nustu ‚Äď Fiskisl√≥√įin

√ěr√≥unarverkefni√į ber nafni√į Fiskisl√≥√įin og er √≠ reynd tv√≠virkt √ĺv√≠ √ĺj√≥nustan sem veri√į a√į √ĺr√≥a sinnir √≠ senn √ļtger√įar- og ranns√≥knaa√įilum. Lagt er upp me√į √ĺa√į a√į √ĺeir sem grei√įa fyrir √ĺj√≥nustuna f√°i ‚Äútvo fyrir einn‚ÄĚ enda myndu b√¶√įi √ļtger√įara√įilar og ranns√≥knara√įilar √° bor√į vi√į Hafranns√≥knastofnun geta n√Ĺtt √∂ll g√∂gn sem afla√į er.

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The fidelity of wolffish towards feeding area in fjord

Steinbitur_HSM_Hvalfirdi_Wolffish_Copyright_Erlendur_Geirdal_Laxfiskar-2010

Movements and migration behaviour of common wolffish (Anarhichas lupus) were studied in Fjord Hvalfjordur W-Iceland throughout June 2010 ‚Äď March 2012. Sampling on the geographical distribution and depth of the wolffish during their stay in Hvalfjord was carried out by tagging fish in June 2010 and May 2011. Using ultrasonic transmitters and by monitoring by logging the dwelling of those fish within detecting area of stationary listening stations throughout the fjord area. Main aim of the study was to map the movements and migration patterns of wolffish in infjord area in relation to time of the year and environmental factors. 
The information received represent the first data on migration behaviour of wolffish individuals in Icelandic waters including data covering period of 34 months. The dwelling of wolffish (67-77 cm in length) within detection area of the receivers and their movements between them has given information on how they utilise the fjord area and on their travelling speed. The wolffish forage in Hvalfjord from January until end of August but are in outer areas in-between due to spawning and the migration involved before and following spawning. Following spawning the wolffish entered the feeding grounds of Hvalfjord in January - April where most of them stayed until June - August when they migrated out of the fjord in the beginning of the spawning migration or just before.  The recorded depth of wolffish in Hvalfjord was ranging from 22 to 49 m and their mean travelling speed when moving between stations where mainly 0,2-0,4 km with instances of higher mean speed, up to 2.5 km/hour. During the summer the wolffish showed generally fidelity to narrow feeding areas as reflected by their staying within detection area of receivers (0,5 km2 +/- 0,3 km2), with examples of such dwelling of individual within range of one station for 20-63% of its time every week for 3 months. The annual monitoring of wolffish in Hvalfjord showed that they entered this feeding area year after year.  The best example of this fidelity of wolffish towards their feeding grounds in the fjord area is the dwelling of two wolffish there for 3 years in a row. This first tagging of wolffish with electronic tags in Icelandic waters have given new information on behaviour ecology of wolffish that are valuable to improve further research on the fish and serve as important references when decisions concerning utilisation of wolffish are taken. In December 2012 report was published (in Icelandic with English abstract) revealing results of the wolffish study 2010-2012 that can be accessed here: G√∂nguheg√įun steinb√≠ts √≠ Hvalfir√įi

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