Estonia Perch and Pike-Perch Assessment
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Do Some Atlantic Bluefin Tuna Skip Spawning?
SCRS/2006/088 Col. Vol. Sci. Pap. ICCAT, 60(4): 1141-1153 (2007) DO SOME ATLANTIC BLUEFIN TUNA SKIP SPAWNING? David H. Secor1 SUMMARY During the spawning season for Atlantic bluefin tuna, some adults occur outside known spawning centers, suggesting either unknown spawning regions, or fundamental errors in our current understanding of bluefin tuna reproductive schedules. Based upon recent scientific perspectives, skipped spawning (delayed maturation and non-annual spawning) is possibly prevalent in moderately long-lived marine species like bluefin tuna. In principle, skipped spawning represents a trade-off between current and future reproduction. By foregoing reproduction, an individual can incur survival and growth benefits that accrue in deferred reproduction. Across a range of species, skipped reproduction was positively correlated with longevity, but for non-sturgeon species, adults spawned at intervals at least once every two years. A range of types of skipped spawning (constant, younger, older, event skipping; and delays in first maturation) was modeled for the western Atlantic bluefin tuna population to test for their effects on the egg-production-per-recruit biological reference point (stipulated at 20% and 40%). With the exception of extreme delays in maturation, skipped spawning had relatively small effect in depressing fishing mortality (F) threshold values. This was particularly true in comparison to scenarios of a juvenile fishery (ages 4-7), which substantially depressed threshold F values. Indeed, recent F estimates for 1990-2002 western Atlantic bluefin tuna stock assessments were in excess of threshold F values when juvenile size classes were exploited. If western bluefin tuna are currently maturing at an older age than is currently assessed (i.e., 10 v. -
Alajõe Valla Arengukava 2015 – 2022
Kinnitatud Alajõe Vallavolikogu 14.10.2014. a määrusega nr 18 Muudetud 07.10.2015 määrusega nr 12 ALAJÕE VALLA ARENGUKAVA 2015 – 2022 2014 Alajõe valla arengukava 2015 - 2022 Sisukord Sissejuhatus ............................................................................................................................ 4 1. Alajõe valla olukorra analüüs ............................................................................................. 5 Piirkonna ajalugu ja kultuuripärand ....................................................................................... 5 Geograafiline asend ................................................................................................................ 6 Elanikkond .............................................................................................................................. 8 Rahvaarvu prognoos ........................................................................................................ 11 Sotsiaalne infrastruktuur ...................................................................................................... 12 Sotsiaaltoetused ja teenused ........................................................................................... 12 Tervishoiuteenus .............................................................................................................. 13 Haridus ............................................................................................................................. 14 Kultuur ja vabaaeg ........................................................................................................... -
Illuka Valla Arengukava 2017-2020 ______
Lisa 1 Kinnitatud Illuka Vallavolikogu 29.11.2016.a. määrusega nr 18 ILLUKA VALLA ARENGUKAVA 2017-2020 ILLUKA VALLA TEGEVUSKAVA 2017-2020 2016 Illuka valla arengukava 2017-2020 __________________________________________________________________________ Sisukord SISSEJUHATUS .................................................................................................... …3 1. ILLUKA VALLA ARENGUT MÕJUTAVAD ÜLDISED SUUNDUMUSED 4 2. ILLUKA VALLA ARENGUKAVA TÄITMINE AASTATEL 2012-2015 ......... 5 3. ILLUKA VALLA VISIOON 2020 JA ÜLDEESMÄRK ...................................... 8 4. ILLUKA VALLA HETKEOLUKORD, ARENGUEESMÄRGID JA TEGEVUSED ....................................................................................................................................... 9 4.1. Asend ja territoorium ...................................................................................................... 9 4.2. Rahvastik ja asustus ..................................................................................................... 10 4.3. Ettevõtlus ......................................................................................................................... 13 4.3.1. Turism ............................................................................................................................. 15 4.4. Tööhõive .......................................................................................................................... 18 4.5. Mittetulundustegevus ja kodanikuühiskond ......................................................... -
Changing Communities of Baltic Coastal Fish Executive Summary: Assessment of Coastal fi Sh in the Baltic Sea
Baltic Sea Environment Proceedings No. 103 B Changing Communities of Baltic Coastal Fish Executive summary: Assessment of coastal fi sh in the Baltic Sea Helsinki Commission Baltic Marine Environment Protection Commission Baltic Sea Environment Proceedings No. 103 B Changing Communities of Baltic Coastal Fish Executive summary: Assessment of coastal fi sh in the Baltic Sea Helsinki Commission Baltic Marine Environment Protection Commission Editor: Janet Pawlak Authors: Kaj Ådjers (Co-ordination Organ for Baltic Reference Areas) Jan Andersson (Swedish Board of Fisheries) Magnus Appelberg (Swedish Board of Fisheries) Redik Eschbaum (Estonian Marine Institute) Ronald Fricke (State Museum of Natural History, Stuttgart, Germany) Antti Lappalainen (Finnish Game and Fisheries Research Institute), Atis Minde (Latvian Fish Resources Agency) Henn Ojaveer (Estonian Marine Institute) Wojciech Pelczarski (Sea Fisheries Institute, Poland) Rimantas Repečka (Institute of Ecology, Lithuania). Photographers: Visa Hietalahti p. cover, 7 top, 8 bottom Johnny Jensen p. 3 top, 3 bottom, 4 middle, 4 bottom, 5 top, 8 top, 9 top, 9 bottom Lauri Urho p. 4 top, 5 bottom Juhani Vaittinen p. 7 bottom Markku Varjo / LKA p. 10 top For bibliographic purposes this document should be cited as: HELCOM, 2006 Changing Communities of Baltic Coastal Fish Executive summary: Assessment of coastal fi sh in the Baltic Sea Balt. Sea Environ. Proc. No. 103 B Information included in this publication or extracts thereof is free for citing on the condition that the complete reference of the publication is given as stated above Copyright 2006 by the Baltic Marine Environment Protection Commission - Helsinki Commission - Design and layout: Bitdesign, Vantaa, Finland Printed by: Erweko Painotuote Oy, Finland ISSN 0357-2994 Coastal fi sh – a combination of freshwater and marine species Coastal fish communities are important components of Baltic Sea ecosystems. -
Alutaguse Valla Üldplaneering
Registrikood 10171636 Riia 35, Tartu 50410 Tel 730 0310 [email protected] TÖÖ NR 2018-048 Asukoht (L-Est’97) X 6562090 Y 691635 Alutaguse valla üldplaneering Lisad Objekti aadress: IDA-VIRUMAA, ALUTAGUSE VALD Tellija: ALUTAGUSE VALLAVALITSUS Töö täitja: Kobras AS Juhataja: URMAS URI Projektijuht/planeerija: TEELE NIGOLA Volitatud maastikuarhitekt, tase 7 Volitatud ruumilise keskkonna planeerija, tase 7 Kartograaf, planeerija: PIIA KIRSIMÄE Kontrollis: ENE KÖND Aprill 2020 TARTU Alutaguse valla üldplaneering Lisad SISUKORD LISA 1. KSH ARUANNE ....................................................................................................................................... 3 LISA 2. ALUTAGUSE VALLAS ASUVAD SADAMAD .................................................................................... 3 LISA 3. MÄEERALDISED JA MAARDLAD ...................................................................................................... 4 LISA 4. VEEALAD ................................................................................................................................................. 9 LISA 5. KULTUURIVÄÄRTUSLIKUD OBJEKTID ......................................................................................... 17 LISA 6. MUINSUSKAITSEAMETI KOOSTATUD ARHEOLOOGIAPÄRANDI ANALÜÜS JA PROGNOOS ALUTAGUSE VALLAS ................................................................................................................. 24 LISA 7. ETTEPANEK PÄRANDKULTUURI OBJEKTIDEKS ARVAMISEKS ............................................ 33 LISA -
Alutaguse Valla Arengukava 2021-2030 Eelnõu Heaks Kiitmine Ja Avalikule Väljapanekule Suunamine“ Juurde
Lisa Alutaguse Vallavalitsuse 20.05.2021. a korralduse 251 „Alutaguse valla arengukava 2021-2030 eelnõu heaks kiitmine ja avalikule väljapanekule suunamine“ juurde Alutaguse valla arengukava 2021-2030 (eelnõu) 2021 SISUKORD SISUKORD ........................................................................................................................................................ 2 SISSEJUHATUS ................................................................................................................................................. 3 1. ALUTAGUSE VALLA ARENGUEELDUSED................................................................................................... 4 1.1. ASEND JA RUUMILINE MUSTER..................................................................................................................... 4 1.2. RAHVASTIK .............................................................................................................................................. 6 1.3. ARENGU VÕTMETEGURID ........................................................................................................................... 8 2. TOIMEKESKKONNA ÜLEVAADE ............................................................................................................. 12 2.1. ELUKESKKOND........................................................................................................................................ 12 2.1.1. Looduskeskkond ........................................................................................................................... -
And Perca Fluviatilis
International Journal of Environmental Research and Public Health Article Using Rutilus rutilus (L.) and Perca fluviatilis (L.) as Bioindicators of the Environmental Condition and Human Health: Lake Ła ´nskie,Poland Joanna Łuczy ´nska 1,* , Beata Paszczyk 1, Marek Jan Łuczy ´nski 2, Monika Kowalska-Góralska 3 , Joanna Nowosad 4 and Dariusz Kucharczyk 4 1 Chair of Commodity and Food Analysis, University of Warmia and Mazury in Olsztyn, ul. Plac Cieszy´nski1, 10-726 Olsztyn, Poland; [email protected] 2 The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, ul. Oczapowskiego 10, 10-719 Olsztyn, Poland; mj.luczynski@infish.com.pl 3 Department of Limnology and Fishery, Institute of Animal Breeding, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, ul. J. Chełmo´nskiego38 c, 51-630 Wrocław, Poland; [email protected] 4 Department of Ichthyology and Aquaculture, Warmia and Mazury University, Al. Warszawska 117A, 10-701 Olsztyn, Poland; [email protected] (J.N.); [email protected] (D.K.) * Correspondence: [email protected]; Tel.: +48-89523-4165 Received: 15 September 2020; Accepted: 16 October 2020; Published: 19 October 2020 Abstract: The aim of this study was to determine the mercury content and fatty acids profile in roach (Rutilus rutilus L.) and European perch (Perca fluviatilis L.) from Lake Ła´nskie(Poland). Mercury content was higher in the muscles than other organs in both species (p < 0.05). Mercury accumulates along the food chain of the lake’s ecosystem. The value of the bioconcentration factor (BCF) indicated that Hg had accumulated in the highest amounts in muscles and in the other organs as follows: muscles > liver > gills > gonads. -
Monthly Highlights | No.7/2018
M onthly Highlights No. 7 / 2018 In this issue Contents HighlightsIn May 2018, first−sales value and volume increased in Denmark, Estonia, Norway and Sweden over May 2017. First sales in Europe No.In 4,the 2014 same period, they dropped in Belgium, Latvia, European perch and pike-perch in Lithuania, Poland, and the UK. Denmark, Estonia, and Poland Over the past three years, average prices of European Extra-EU imports perch were the highest in Denmark (2,50 EUR/kg), Weekly average EU import prices for followed by Estonia (2,28 EUR/kg) and Poland selected products from selected (1,94 EUR/kg). Average price of pike-perch in Denmark countries of origin (8,33 EUR/kg) was 106% higher than that in Estonia (4,05 EUR/kg), and 99% higher than in Poland Consumption (4,18 EUR/kg). Gilthead seabream in France, Italy, Extra-EU import prices of Ecuadorian tropical shrimp Portugal, and Spain continued to fall amid a global supply glut. Frozen tilapia from China continued a long-run rise in price. Case studies In January–April 2018, the average retail price of fresh Atlantic mackerel in the EU gilthead seabream for household consumption was the Fisheries and aquaculture in highest in France (11,39 EUR/kg) and the lowest in Madagascar Portugal (6,41 EUR/kg). Global Highlights EU consumption of mackerel was 1,07 kg per capita in 2016, which places mackerel in seventh place on the list Macroeconomic context of top fish species consumed in the EU. Marine fuel, consumer prices, exchange rates In 2017, Malagasy exports to the EU reached EUR 142 million and 21.318 tonnes, mostly frozen shrimp and canned tuna. -
Rahvastiku Ühtlusarvutatud Sündmus- Ja Loendusstatistika
EESTI RAHVASTIKUSTATISTIKA POPULATION STATISTICS OF ESTONIA __________________________________________ RAHVASTIKU ÜHTLUSARVUTATUD SÜNDMUS- JA LOENDUSSTATISTIKA REVIEWED POPULATION VITAL AND CENSUS STATISTICS Ida-Virumaa 1965-1990 Kalev Katus Allan Puur Asta Põldma Aseri Kohtla Lüganuse Toila JÕHVI Sonda Jõhvi Sinimäe Maidla Mäetaguse Illuka Tudulinna Iisaku Alajõe Avinurme Lohusuu Tallinn 2002 EESTI KÕRGKOOLIDEVAHELINE DEMOUURINGUTE KESKUS ESTONIAN INTERUNIVERSITY POPULATION RESEARCH CENTRE RAHVASTIKU ÜHTLUSARVUTATUD SÜNDMUS- JA LOENDUSSTATISTIKA REVIEWED POPULATION VITAL AND CENSUS STATISTICS Ida-Virumaa 1965-1990 Kalev Katus Allan Puur Asta Põldma RU Seeria C No 19 Tallinn 2002 © Eesti Kõrgkoolidevaheline Demouuringute Keskus Estonian Interuniversity Population Research Centre Kogumikuga on kaasas diskett Ida-Virumaa rahvastikuarengut kajastavate joonisfailidega, © Eesti Kõrgkoolidevaheline Demouuringute Keskus. The issue is accompanied by the diskette with charts on demographic development of Ida-Virumaa population, © Estonian Interuniversity Population Research Centre. ISBN 9985-820-66-5 EESTI KÕRGKOOLIDEVAHELINE DEMOUURINGUTE KESKUS ESTONIAN INTERUNIVERSITY POPULATION RESEARCH CENTRE Postkast 3012, Tallinn 10504, Eesti Kogumikus esitatud arvandmeid on võimalik tellida ka elektroonilisel kujul Lotus- või ASCII- formaadis. Soovijail palun pöörduda Eesti Kõrgkoolidevahelise Demouuringute Keskuse poole. Tables presented in the issue on diskettes in Lotus or ASCII format could be requested from Estonian Interuniversity Population Research -
Kommunikatsioonikorrald
Tartu Ülikool Humanitaarteaduste ja kunstide valdkond Ajaloo ja arheoloogia instituut Eesti ajaloo õppetool Janari Rajas KOMMUNIKATSIOONIKORRALDUS IISAKU VALLAS AASTATEL 1918-1940 Bakalaureusetöö Juhendaja: dotsent Enn Küng Tartu 2016 SISUKORD SISSEJUHATUS............................................................................................................... 3 1. AJALOOLINE ÜLDPILT IISAKUST ....................................................................... 6 2. POST JA SIDETEENUSED ....................................................................................... 9 2.1. Noore Eesti riigi posti ja sideteenused ................................................................. 9 2.2. Postiteenistus Iisaku vallas ................................................................................ 10 2.3. Ajalehed ............................................................................................................ 20 2.4. Telefoni kõnepunktid ........................................................................................ 22 3. TEEDEMAJANDUS................................................................................................ 24 3.1. Olukord Eesti Vabariigi algusaegadel ................................................................ 24 3.2. Teede olukord Iisaku vallas 1918-1940 ............................................................. 25 3.3. Kruus ................................................................................................................ 32 3.4. Sildade remont ................................................................................................. -
Some Biological Parameters of Silverstripe Blaasop, Lagocephalus Sceleratus (Gmelin, 1789) from the Mersin Bay, the Eastern Mediterranean of Turkey
Research article Some biological parameters of silverstripe blaasop, Lagocephalus sceleratus (Gmelin, 1789) from the Mersin Bay, the Eastern Mediterranean of Turkey Hatice TORCU-KOÇ*, . Zeliha ERDOĞAN , Tülay ÖZBAY ADIGÜZEL Department of Biology, Faculty of Science and Arts, University of Balikesir, Cağış Campus, 10145, Balikesir, Turkey * Corresponding author e-mail: [email protected] Abstract: A total of 208 individuals of silverstripe blaasop, Lagocephalus sceleratus were caught by trawl hauls from Mersin Bay in the years of September 2014 and April 2015. The samples ranged from 14.9 cm to 67.6 cm in fork length and 32.0 g to 4540.0 g in total weight. The ages of silverstripe blaasop population were determined between 1-6 using vertebra. As the silverstripe blaasop population in Mersin Bay consisted of 98 females and 110 males, the sex ratio was calculated as 0.88: 1(F:M) with 52.88% of the population were males and 47.12% of the population were females (p>0.05, t-test). The length-weight relationship of all individuals was calculated as Lt=118.71(1-e-0.115(t-0.178)). According to the length-weight relationships, an isometric growth was confirmed for both sexes, except for those estimated in female and male. The monthly values of gonadosomatic index (GSI) of females indicated that spawning occurred mainly between March and April. Gastrosomatic Index (GaSI) was found to be the highest in December and the least in October that is before and after the spawning season. Analysis of the diet composition showed that silverstripe blaaosop is carnivorous and the food spectrum of L. -
The Influence of Northern Pike on the Diet of Eurasian Perch
The influence of northern pike on the diet of Eurasian perch Ylva Karlberg Student Degree Thesis in Biology, 15 ECTS Bachelor’s level Report passed: 2017-06-02 Supervisor: Gunnar Öhlund and Göran Englund The influence of northern pike on the diet of Eurasian perch Ylva Karlberg Abstract Top predators in aquatic ecosystems often have strong top-down effects on the ecosystem. Northern pike (Esox lucius) has been documented to cause whitefish (Coregonus lavaretus) populations to diverge into different ecomorphs. This can facilitate piscivory in other predators as a novel resource becomes available to them in the form of dwarf whitefish. The aim of this study is to examine whether the presence of pike causes Eurasian perch (Perca fluviatilis) to shift their diet from insectivory to piscivory, and whether this is directly driven by whitefish polymorphism. Stomach contents of 147 perch from lakes with and without pikes were analyzed. The results show that the presence of pike has a clear influence on the diet of the perch. In lakes without pike, perch are mostly insectivorous, and in lakes with pike, they are mostly piscivorous. This diet shift appears to be driven by whitefish availability, as a majority of the diet of perch in pike lakes consisted of whitefish, while none of the fish eaten by perch in non-pike lakes was whitefish. In addition, the results showed that perch undergo the diet shift from insectivory to piscivory at a smaller size when coexisting with pike. This study can be added to the growing body of evidence for the ecological significance of pike.