Pseudorasbora Parva Temminck & Schlegel, 1846
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Levels in Edible Muscle and Skin Tissues of Cyprinus Carpio L
ISSN 1392-2130. VETERINARIJA IR ZOOTECHNIKA (Vet Med Zoot). T. 63 (85). 2013 CHROMIUM (CR), NICKEL (NI) AND ZINC (ZN) LEVELS IN EDIBLE MUSCLE AND SKIN TISSUES OF CYPRINUS CARPIO L. IN ÇAMLIGÖZE DAM LAKE, SIVAS, TURKEY Seher Dirican1*, Ahmet Yokuş2, Servet Karaçınar2, Sevgi Durna3 1Department of Fisheries, Suşehri Vocational Training School, Cumhuriyet University 58600 Suşehri, Sivas, Turkey 2Department of Food Technology, Suşehri Vocational Training School, Cumhuriyet University 58600 Suşehri, Sivas, Turkey 3Department of Biology, Faculty of Science, Cumhuriyet University, 58140 Sivas, Turkey *Corresponding Author’s E-mail: [email protected] Abstract. In this study, Cr, Ni and Zn levels were determined by atomic absorption spectrophotometry in edible muscle and skin tissues of Cyprinus carpio in Çamlıgöze Dam Lake located at Central Anatolian region of Turkey. The maximum levels were found to be 0.12 (Cr), 2.15 (Ni), 0.51 (Zn) µg/g in the muscle and 0.15 (Cr), 2.07 (Ni), 1.97 (Zn) µg/g in the skin of Cyprinus carpio. It was determined that Ni was the highest metal in tissues. The highest Cr and Zn levels were determined in the skin of Cyprinus carpio, whereas the highest Ni levels were measured in the muscle. The heavy metal accumulation orders for the tissues were as follows: Ni>Zn>Cr in Çamlıgöze Dam Lake. There was important statistical differences, especially at the level of zinc accumulation in tissues (p<0.001). There was a significant and positive correlation between age, total length, weight and metal levels for Cr (r>0.25, p<0.05) in the muscle and skin of Cyprinus carpio in Çamlıgöze Dam Lake. -
Issue Full File
Türk Tarım ve Doğa Bilimleri Dergisi 2018 Turkish Journal of Agricultural and Natural Sciences Cilt 4 Volume 4 Yıl : 2018 Sayı : 2 Cilt 5 Year : 2018 Issue : 2 Volume 5 İçindekiler Makale Adı ve Yazarları Sayfa No Trakya Bölgesinde İyi Tarım Uygulayan ve Uygulamayan Üreticilerin Tarımsal Yenilikleri Benimsenmesi Yönünden Karşılaştırılması 90-99 Başak AYDIN, Duygu AKTÜRK, Erol ÖZKAN, Mehmet Ali KİRACI, Harun HURMA Farklı Tuzluluk Düzeyindeki Sulama Sularının Örtü Altında Yetiştirilen Brokoli Bitkisinin Enerji Kullanım Etkinliği Üzerine Etkisi 100-108 Ulviye KAMBUROĞLU ÇEBİ, Başak AYDIN, Selçuk ÖZER, Süreyya ALTINTAŞ, Ozan ÖZTÜRK Erzurum Kenti Okul Bahçelerinin Fiziki Yeterlilikleri 109-120 Hüccet VURAL, Sevgi YILMAZ Thymbra spicata L. ve Rosmarinus officinalis L. Uçucu Yağlarının Monilinia fructigena Honey in Whetze’ya Karşı Antifungal Aktivitesi 121-126 Melih YILAR, Yusuf BAYAR Portakal Kabuğundan (Citrus sinensis L.) İzole Edilen Esansiyel Yağın Broyler Diyetlerine Eklenmesinin Performans Üzerine Etkileri 127-135 Ahmet AYDIN, Ahmet ALÇİÇEK Seçilmiş Bazı Yabani Erik Anaç Adaylarının Kayısılarda Bazı Mikro Besin Maddeleri Alımına Etkileri 136-145 Remzi UĞUR, Sevgi Paydaş KARGI Türkiye'de Anisoplia segetum Herbst (Coleoptera: Scarabaeidae) Popülasyonlarında Aranciocystis muskarensis (Neogregarinida: Ophryocystidae) Dağılımı ve İklim Faktörleri İle İlişkisi 146-152 Çağrı BEKİRCAN, Hilal BAKİ, Hilal BAKİ, Onur TOSUN Murat Nehri ve Kollarında (Doğu Anadolu Bölgesi, Türkiye) Yaşayan Musul İnci Balığı (Alburnus mossulensis)'nın Metazoan Parazitlerinin -
Sayı Tam Dosyası
LIMNOFISH-Journal of Limnology and Freshwater Fisheries Research 6(1): 1-13 (2020) Efficiency and Suitability of the Fish Passages of River Ceyhan, Turkey Ahmet ALP1* , Adil AKYÜZ2 , Mikail ÖZCAN1 , Sedat Vahdet YERLİ3 1University of Kahramanmaraş Sütçü İmam, Faculty of Agriculture, Department of Fisheries, Kahramanmaraş, Turkey 2University of Kahramanmaraş Sütçü İmam, Faculty of Agriculture, Department of Biosystem Engineering, Kahramanmaraş, Turkey 3Hacettepe University, Department of Biology, SAL Ankara, Turkey ABSTRACT ARTICLE INFO The efficiencies of the two fish passages of River Ceyhan (Turkey) were RESEARCH ARTICLE investigated by using trap catches, external tags (T-bar anchor tags), PIT telemetry and radio telemetry. According to the results of the study, the pool and Received : 11.09.2019 weir type fish passage were not effective; no fish entered the trap in this fish Revised : 01.11.2019 passage. Further, it was observed that none of the 50 external tagged fishes, 44 PIT-tagged fishes, and 47 radio-tagged fishes passed through this fish passage. A Accepted : 04.11.2019 total of 900 Capoeta damascina and 520 Alburnus adanensis entered the trap Published : 25.04.2020 installed in the vertical slot fish passage. A relationship was found between the gender ratio of the migratory C. damascina and their migration times. Fish DOI:10.17216/LimnoFish.618924 passage performance was different according to the applications. These differences in fish passage success among the applications originated from the * CORRESPONDING AUTHOR sizes of the tagged fish. Because the sizes of the radio-tagged fish were much [email protected] larger than that of the external tagged fish and PIT-tagged fish so the success of the fish passage according to the radio telemetry was estimated higher than that of the other applications. -
Abstract Keywords Distribution and Impacts of Carassius Species
ISSN 1989‐8649 Manag. Biolog. Invasions, 2011, 2 Abstract Distribution and impacts of Carassius species (Cyprinidae) in Turkey: a review Biological invasions have caused considerable disruption to native Deniz INNAL ecosystems throughout the world through predation, habitat alteration, competition and hybridisation with Introduction, Hypotheses and species have been introduced in native species and introduction of Problems for Management Turkey as eggs, fry or fingerlings for diseases or parasites. Species of the different purposes over the last five genus Carassius [C. auratus (Linnaeus, In Europe, three species of the decades. Some of these fish have 1758), C. carassius (Linnaeus, 1758) and genus Carassius Nilsson 1832, are been used only in closed systems C. gibelio (Bloch, 1782)] were known; the goldfish, Carassius while others have been released transported to numerous inland water auratus (Linnaeus, 1758), the into open inland waters throughout bodies throughout Turkey. Species are crucian carp, Carassius carassius the country (Innal & Erk’akan 2006). now considered a threat factor for (Linnaeus, 1758) and the prusian Freshwater fish introductions may native species. The purpose of this (gibel) carp, Carassius gibelio (Bloch, result in impacts as a result of one study is to review the current 1782) (Ozulug et al. 2004). or many undesirable characteristics, distribution and ecological impacts of including: competition, habitat species in the inland waters of Turkey. Whereas C. carassius is alteration, parasitism, predation, native to Turkey, the other two hybridisation, alteration of habitat Keywords species of the genus Carassius were quality and/or ecosystem function, introduced to inland waters of host of pests or parasites (Copp et Carassius carassius, C. -
Hydrogeological Investigation and Characterization of Alpu Sector-A Coal Field in Eskisehir-Turkey a Thesis Submitted to the Gr
HYDROGEOLOGICAL INVESTIGATION AND CHARACTERIZATION OF ALPU SECTOR-A COAL FIELD IN ESKISEHIR-TURKEY A THESIS SUBMITTED TO THE GRADUATE SCHOOL OF NATURAL AND APPLIED SCIENCES OF MIDDLE EAST TECHNICAL UNIVERSITY BY TEVFİK KAAN DÜZ IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN GEOLOGICAL ENGINEERING JULY 2018 Approval of the thesis: HYDROGEOLOGICAL INVESTIGATION AND CHARACTERIZATION OF ALPU SECTOR-A COAL FIELD IN ESKISEHIR TURKEY submitted by TEVFİK KAAN DÜZ in partial fulfillment of the requirements for the degree of Master of Science in Geological Engineering Department, Middle East Technical University by, Prof. Dr. Halil Kalıpçılar Dean, Graduate School of Natural and Applied Science __________________ Prof. Dr. Erdin Bozkurt Head of Department, Geological Engineering __________________ Prof. Dr. Hasan Yazıcıgil Supervisor, Geological Engineering Dept., METU __________________ Examining Committee Members: Prof. Dr. Mehmet Ekmekçi Hydrogeological Engineering Dept., Hacettepe University __________________ Prof. Dr. Hasan Yazıcıgil Geological Engineering Dept., METU __________________ Prof. Dr. M. Zeki Çamur Geological Engineering Dept., METU __________________ Assoc.Prof. Dr. Koray K. Yılmaz Geological Engineering Dept., METU __________________ Assoc. Prof. Dr. Özlem Yağbasan Department of Geography Education, Gazi University ___________________ Date: 09.07.2018 I hereby declare that all information in this document has been obtained and presented in accordance with academic rules and ethical conduct. I also declare that, as required by these rules and conduct, I have fully cited and referenced all material and results that are not original to this work. Name, Last Name: Tevfik Kaan DÜZ Signature: iv ABSTRACT HYDROGEOLOGICAL INVESTIGATION AND CHARACTERIZATION OF ALPU SECTOR-A COAL FIELD IN ESKISEHIR-TURKEY DÜZ, Tevfik Kaan M.S., Department of Geological Engineering Supervisor: Prof. -
Doç. Dr. Esengül KÖSE
ESENGÜL KÖSE Doç. Dr. E-Posta Adresi : [email protected] Telefon (İş) : 2222361415-4506 Telefon (Cep) : Faks : Adres : Organize Sanayi Bölgesi Antrepo Caddesi No: 1 ESKİŞEHİR Öğrenim Bilgisi DUMLUPINAR ÜNİVERSİTESİ Doktora 2007 FEN BİLİMLERİ ENSTİTÜSÜ/BİYOLOJİ (DR) 28/Haziran/2012 Tez adı: Porsuk Çayı Su, Sediment ve Bazı Balık Türlerinde Ağır Metal Miktarlarının Araştırılması (2012) Tez Danışmanı:(KAZİM UYSAL,ARZU ÇİÇEK) DUMLUPINAR ÜNİVERSİTESİ Yüksek Lisans 2004 FEN BİLİMLERİ ENSTİTÜSÜ/BİYOLOJİ (YL)/ZOOLOJİ BİLİM DALI 28/Mart/2007 Tez adı: Enne Barajı'nda Yaşayan Balıklarda Ağır Metal Birikiminin Araştırılması (2007) Tez Danışmanı:(KAZİM UYSAL) SÜLEYMAN DEMİREL ÜNİVERSİTESİ Lisans 1999 EĞİRDİR SU ÜRÜNLERİ FAKÜLTESİ/SU ÜRÜNLERİ MÜHENDİSLİĞİ BÖLÜMÜ/SU ÜRÜNLERİ MÜHENDİSLİĞİ PR. 12/Şubat/2004 Görevler YARDIMCI DOÇENT ESKİŞEHİR OSMANGAZİ ÜNİVERSİTESİ/ESKİŞEHİR MESLEK YÜKSEKOKULU) 2013 Projelerde Yaptığı Görevler: Sarısu Deresinin Biyotik ve Abiyotik Faktörlerinde Bazı Makro ve Mikro Elementlerin Belirlenmesi, Yükseköğretim Kurumları tarafından destekli bilimsel araştırma projesi, Araştırmacı:KÖSE 1. ESENGÜL,Araştırmacı:EMİROĞLU ÖZGÜR,Yürütücü:ÇİÇEK ARZU,Araştırmacı:TOKATLI CEM,Araştırmacı:AKSU SADİ, , 15/12/2017 - 24/12/2018 (ULUSAL) COĞRAFİ BİLGİ SİSTEMİ (CBS) VE BAZI İSTATİSTİKİ TEKNİKLER KULLANILARAK MERİÇ NEHRİ AŞAĞI HAVZASI SU VE SEDİMENT KALİTESİNİN DEĞERLENDİRİLMESİ: TOKSİK METALLER VE PESTİSİTLER, Yükseköğretim Kurumları tarafından destekli bilimsel araştırma projesi, 2. Araştırmacı:ÇİÇEK ARZU,Araştırmacı:EMİROĞLU ÖZGÜR,Araştırmacı:KÖSE -
How Zebra Mussels Threaten to Water Supply Security and Effects of Preventive Measures in Turkey
Available online at www.worldscientificnews.com WSN 64 (2017) 99-126 EISSN 2392-2192 How Zebra Mussels Threaten to Water Supply Security and Effects of Preventive Measures in Turkey Seyit Aksu1, Dursun Yildiz2, Aysen Pervin Güngör3 1,3Hydropolitics Academy, Güfte Sok. 8/9 06680, Kavaklidere, Ankara, Turkey 2Hydropolitics Association, Güfte Sok. 8/9 06680, Kavaklidere, Ankara, Turkey 1-3E-mail address: [email protected] ; [email protected] ; [email protected] ABSTRACT Water mismanagement, overuse, unplanned and uncoordinated water management and climate change effects can be counted as emerging threats on renewable water resources and sustainable water use. These effects can also lead to a water supply security threats for the end user of water.In another words, water supply security is a very important part of the water security chains and directly depends on operational security of the water supply systems. Turkey has experienced with zebra mussels problems in Atatürk Dam and HEPP since 1997. Zebra Mussels accumulation has also created some problems in Birecik Dam in 2000. DSI (DG State Hydraulic Works) has started the site investigation on monitoring studies in Kesikköprü Dam and Atatürk Dam during years of 2001 and 2002. According to DSİ report (1), in Turkey, 629 small and large dams, 384 irrigation schemes, 98 water supply systems has been opened by State Hydraulic Works (DSİ) since 2005. Private sector has also built 510 river and canal type hydroelectric power plants since 2008. More than 100 small HEPP projects are under construction in different basins. About 550 small dams mainly for irrigation purposes are planned to built in near future. -
Pseudorasbora Parva (Temminck & Schlegel, 1846): a New Threat To
LIMNOFISH-Journal of Limnology and Freshwater Fisheries Research 6(1): 52-58 (2020) Pseudorasbora parva (Temminck & Schlegel, 1846): A New Threat to Fish Biodiversity in Ordu Province (Middle Black Sea Region) Derya BOSTANCI1 , Serdar YEDİER1* , Nazmi POLAT2 1Ordu University, Faculty of Arts and Sciences, 52200 Ordu-Turkey 2Ondokuz Mayıs University, Faculty of Arts and Sciences, 55139 Samsun-Turkey ABSTRACT ARTICLE INFO The invasive fish species pose a significant threat to both local fish species and SHORT COMMUNICATION aquatic habitats. During the field surveys, an invasive fish species Pseudorasbora parva was found for the first time in Ulugöl (Ordu). In the field studies, 41 Received : 06.05.2019 P. parva individuals from different size groups were captured. Total length (TL), Revised : 28.08.2019 fork length (FL), standard length (SL) and weight (W) of this invasive species Accepted : 26.09.2019 which continuously increase distribution in Turkish inland waters were recorded. The average TL, FL, SL and W values of the P. parva were 7.24±1.2 cm Published : 25.04.2020 (3.8-9.4 cm), 6.52±1.1 cm (3.4-8.4 cm), 5.73±0.9 cm (3.0-7.1 cm) and 3.24±1.4 g (0.4415-6.8632 g), respectively. P. parva species was reported as the DOI:10.17216/LimnoFish.560633 first record in Ordu (Middle Black Sea Region). The increase in the number of P. parva individuals in Ulugöl is a great threat to Ordu fish biodiversity. * CORRESPONDING AUTHOR Keywords: Freshwater fishes, invasive fish species, Topmouth gudgeon, Ordu [email protected] Phone : +90 452 233 9149 Pseudorasbora parva (Temminck & Schlegel, 1846): Ordu'da (Orta Karadeniz Bölgesi) Balık Biyoçeşitliliğine Yeni Bir Tehdit Öz: İstilacı balık türleri hem yerel balık türleri hem de akuatik habitatlar için önemli bir tehdit oluşturmaktadır. -
Geoecological Situation in the Volga
J. Wetlands Biodiversity (2020) 10: 95-111 INFESTATION OF FISH LOUSE, ARGULUS FOLIACEUS (LINNAEUS, 1758) (CRUSTACEA: BRANCHIURA) ON RAINBOW TROUT FARM IN MANYAS DAM LAKE, TURKEY Ahmet Öktener and Abdulkadir Ünal Received: 11.09.2020 / Accepted: 02.11.2020 Abstract: The study presents the occurrence of fish louse, Argulus foliaceus (Linnaeus, 1758) on the rainbow trout, Onchorhynchus mykiss caged in Manyas Dam Lake, Turkey, on 2019. This argulid species is found on the gill filaments of hosts. Morphological characters of fish louse are given with photos. This finding is the first report of Argulus foliaceus from rainbow trout and Manyas Dam Lake. In addition to, host preferences and updated-checklist of Argulus species reported from Turkey are provided. Moreover, Ichthyophthirius sp. that caused the death of approximately 100,000 rainbow trout fry has been identified at another trout farm that farms fish in concrete pools. Keywords: Argulus, fish louse, Ichthyophthirius, Manyas Dam Lake, Turkey Introduction:1 species of Argulus are known from Europe. Argulus coregoni Thorell, 1865, Argulus Members of Branchiura are known as fish lice foliaceus (Linnaeus, 1758) are native to of fish louse. Argulidae family (Crustacea; Europe, while Argulus japonicus Thiele, 1900 Branchiura) contains four genera, Argulus, as a non-native has recently been introduced Chonopeltis, Dipteropeltis and Dolops. This (Rushton-Mellor 1992; Taylor et al. 2006; group is especially ectoparasitic crustaceans Soes et al. 2010). of freshwater fishes, occasionally live marine Argulus is a serious pathogen capable of fishes, rarely on amphibians such as tadpoles, serious pathological effects on both wild and salamanders and alligators. Argulus genus is cultured fishes. -
Revision of Parasitic Helminths Reported in Freshwater Fish from Turkey with New Records
Transylv. Rev. Syst. Ecol. Res. 16.1 (2014), "The Wetlands Diversity" 1 REVISION OF PARASITIC HELMINTHS REPORTED IN FRESHWATER FISH FROM TURKEY WITH NEW RECORDS Ahmet ÖKTENER * * Directorate of Agricultural Research and Policy, Livestock Research Station, Department of Fisheries, Çanakkale Street km 7, Bandirma, Balikesir, Turkey, TR-10200, [email protected] DOI: 10.1515/trser-2015-0001 KEYWORDS: Turkey, freshwater, checklist, revision, helminths, fish. ABSTRACT This new checklist is an update of helminths of freshwater fish from Turkey. The last publication of a checklist of helminth parasites of freshwater fish in Turkey was over 11 years ago (Öktener, 2003), and there have been a number of new records. This update includes additional records and allows for the correction of errors and omissions that were present in the preceding version. The revision literature indicated the occurrence of 123 parasite species which included 60 monogeneans, 20 digeneans, 20 cestodes, 11 nematodes, seven acanthocephalans, five annelids from 71 different wild fish (64 native, four transitional, three introduced fish) species from freshwater in Turkey. Parasites not identified to species level are listed separately, and not included in the resulting comments, because of reporting different host species. Cyprinidae, with 50 species, is the dominant family among the examined fish with regard to species diversity. RESUMEN: Revisión de parásitos helmintos reportados en peces de aguadulce en Turquía, con nuevos registros. Se realizó una actualización del elenco de especies de helmintos parásitos de peces de agua dulce de Turquía. Desde la publicación del último listado de parásitos helmintos de peces dulceacuícolas, hace 11 años (Öktener, 2003), han habido cantidad de nuevos registros. -
Limak Annual Report 2020
Limak Group of Companies Annual Report 2020 This limited edition report has been published on 100% recycled paper. Table of Contents CEMENT Limak at a Glance 4 Message from the Board of Directors 6 Investments 64 Limak Balıkesir Cement 73 Milestones 8 Certificates and Awards 65 Limak Trakya Cement 74 Group Structure 10 Limak Kurtalan Cement 67 Limak Bitlis Cement 75 Our Global Collaborations 11 Limak Ergani Cement 68 Limak Derik Cement 76 Limak Kilis Cement 69 Limak Cimentos SA Mozambique 77 Kilis Pumice Block Plant 70 Limak Africa SA Ivory Coast 78 CONSTRUCTION Projects 14 Headliner Housing Project, Russian Federation 30 Limak Şanlıurfa Cement 71 Ready-Mixed Concrete Plants 79 Ongoing Domestic Projects 15 Esplanada Multi-Functional Center Project, 30 Limak Anka Cement 72 1915 Çanakkale Bridge and 16 Russian Federation Malkara-Çanakkale Motorway Arena Omsk Stadium, Russian Federation 30 Central Bank of the Republic of Turkey 18 Dnipro Subway Construction, Ukraine 31 Campus 1st Stage Ufa Eastern Exit Highway, Russian Federation 31 INFRASTRUCTURE Investments 82 Dakar Blaise-Diagne International 87 Artvin-Erzurum Highway, Section I 19 Hassanabdal-Havelian Highway (E-35) 32 Certificates and Awards 83 Airport, Senegal Artvin-Erzurum Highway, Section II 19 Sarai Saleh-Simlaila Section, Pakistan İstanbul Airport 84 LimakPort İskenderun 88 Artvin-Erzurum Highway, Section III 19 State Highway (N-50) Zhob-Killi 32 Pristina Adem Jashari 86 Ankara High-Speed Train Station 89 Yusufeli Dam and HEPP 20 Khudae Nazar Section, Pakistan International Airport, -
Historical Background of the Trust
TRANSYLVANIAN REVIEW OF SYSTEMATICAL AND ECOLOGICAL RESEARCH 16.1 The Wetlands Diversity Editors Angela Curtean-Bănăduc & Doru Bănăduc Sibiu - Romania 2014 TRANSYLVANIAN REVIEW OF SYSTEMATICAL AND ECOLOGICAL RESEARCH 16.1 The Wetlands Diversity Editors Angela Curtean-Bănăduc & Doru Bănăduc “Lucian Blaga” University of Sibiu, Faculty of Sciences, Department of Ecology and Environment Protection Published based mainly on some of the scientific materials presented at the fourth “Aquatic Biodiversity International Conference” - Sibiu/Romania 2013 East and South “Lucian Blaga” International Ecotur Sibiu European network for University Association N.G.O. Invasive Alien Species of Sibiu for Danube Research Sibiu - Romania 2014 Scientifical Reviewers John Robert AKEROYD Sherkin Island Marine Station, Sherkin Island - Ireland. Doru BĂNĂDUC “Lucian Blaga” University of Sibiu, Sibiu - Romania. Jürg BLOESCH International Association for Danube Research, Dübendorf - Switzerland. Swaranjit Singh CAMEOTRA Institute of Microbial Technology, Chandigarht - India. Kevin CIANFAGLIONE University of Camerino, Camerino - Italy. Angela CURTEAN-BĂNĂDUC “Lucian Blaga” University of Sibiu, Sibiu - Romania. Jenny DAY University of Cape Town, Rhodes Gift, Western Cape - South Africa. Laurisse FRAMPTON Australian Rivers Institute, Griffith University, Nathan, Queensland - Australia. Marian-Traian GOMOIU Romanian Academy, Bucharest - Romania. Georg Albert JANAUER University of Vienna, Vienna - Austria. Mike JOY Te Kura Matauranga o nga Taonga a Papatuanuku Massey University, Palmerston North - New Zealand. Maria LEICHTFRIED Institute for Limnology, Austrian Academy of Sciences, Mondsee - Austria. Mirjana LENHARDT Institute for Biological Research, Belgrade - Serbia. Eugenia LÓPEZ-LÓPEZ National School of Biological Sciences, National Polytechnic Institute, México D. F. - México. Weronika MAŚLANKO University of Life Science of Lublin, Lublin - Poland. Eckbert SCHNEIDER Institute for Waters and River Basin Management, Karlsruhe University, Rastatt - Germay.