Jörg Freyhof

ORCID: 0000-0002-6762-8615
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Research Areas
  • Fish Biology and Ecology Studies
  • Fish Ecology and Management Studies
  • Identification and Quantification in Food
  • Genetic diversity and population structure
  • Fish biology, ecology, and behavior
  • Environmental and Biological Research in Conflict Zones
  • Ichthyology and Marine Biology
  • Genomics and Phylogenetic Studies
  • Aquatic Ecosystems and Biodiversity
  • Genetic and phenotypic traits in livestock
  • Marine Ecology and Invasive Species
  • Ecology and biodiversity studies
  • Environmental DNA in Biodiversity Studies
  • Chromosomal and Genetic Variations
  • Land Use and Ecosystem Services
  • Aquatic Invertebrate Ecology and Behavior
  • Morphological variations and asymmetry
  • Wildlife Ecology and Conservation
  • Economic Sanctions and International Relations
  • Marine and environmental studies
  • Physiological and biochemical adaptations
  • Aquatic Ecosystems and Phytoplankton Dynamics
  • Marine and fisheries research
  • Spider Taxonomy and Behavior Studies
  • Subterranean biodiversity and taxonomy

Museum für Naturkunde
2020-2025

Leibniz Institute of Freshwater Ecology and Inland Fisheries
2007-2019

Leibniz Association
2004-2013

Leibniz Institute for Neurobiology
2013

KU Leuven
2009

Institut für Angewandte Gewässerökologie (Germany)
2008

National University of Singapore
2005

We examine the evolving concept of what constitutes a non-native (or alien) freshwater fish. In an attempt to distinguish between biogeographical and socio-political perspectives, we review patterns in introduction dispersal fishes Europe North America, especially recent expansion Ponto-Caspian gobies Europe. assess development national policy legislation response perceived threat fish introductions native species ecosystems. review, provide glossary of, terms definitions associated with...

10.1111/j.1439-0426.2005.00690.x article EN Journal of Applied Ichthyology 2005-08-01

Abstract Global pressures on freshwater ecosystems are high and rising. Viewed primarily as a resource for humans, current practices of water use have led to catastrophic declines in species the degradation ecosystems, including their genetic functional diversity. Approximately three‐quarters world's inland wetlands been lost, one‐third 28 000 assessed International Union Conservation Nature (IUCN) Red List threatened with extinction, vertebrate populations undergoing that more rapid than...

10.1002/aqc.2958 article EN Aquatic Conservation Marine and Freshwater Ecosystems 2018-08-01

Two new species of the fish genus Garra (Cypriniformes: Cyprinidae) are described from lower Yarlung Tsangpo River drainage in southeastern Tibet, China. motuoensis, a member proboscis group, is primarily distinguished members this group by having prominent, quadrate, and slightly bilobed proboscis; 6-20 small to middle-sized unicuspid tubercles on anterior region proboscis, some transverse lobe snout, several lateral surface snout; anus situated closer anal-fin origin than pelvic-fin...

10.11646/zootaxa.4532.3.3 article EN Zootaxa 2018-12-19

The diversity of Cobitis in the Middle East is reviewed, resulting recognition 30 species, which eight are described herein as new. Two C. amphilekta and kellei, seem to be extinct. Hypotheses on species-level derived from distance Poisson tree process analyses DNA barcode data tested against morphometric morphological characters including colour patterns. For species pairs separated by small K2P distances COI sequence we follow a practitioner-oriented diagnostic concept, recognise only if...

10.11646/zootaxa.4535.1.1 article EN Zootaxa 2018-12-21

Two new species of Oxynoemacheilus are described from the Sirvan River drainage in Iraqi Kurdistan. gyndes, species, is distinguished by having a very short lateral line, reaching behind pectoral-fin base, no scales except on posteriormost part caudal peduncle, slightly emarginate fin and suborbital groove males. hanae, midlateral row elongated blotches, isolated patches dark-brown spots or blotches lower flank, deeply

10.11646/zootaxa.4238.1.5 article EN Zootaxa 2017-03-02

Eidinemacheilus proudlovei, new species, is described from subterranean waters in the Little Zab River drainage Iraqi Kurdistan. After discovery of E. smithi 1976, proudlovei second troglomorphic nemacheilid loach found Middle East and species placed Eidinemacheilus. distinguished by having 8+8 or 8+7 branched caudal-fin rays, no adipose keel on caudal peduncle, enlarged jaws a fully developed head canal system. It furthers differs substantially its DNA barcode (>8% K2P distance) all...

10.11646/zootaxa.4173.3.2 article EN Zootaxa 2016-10-04

Oxynoemacheilus kentritensis, new species, is described from the Botan drainage, a tributary to upper Tigris. It distinguished other species in Tigris drainage by having complete lateral line, long barbels, flank and back completely covered scales behind dorsal-fin base with large, dark-brown, vertically elongated blotches or bars.

10.11646/zootaxa.4258.6.4 article EN Zootaxa 2017-05-03

Sympatric species pairs are particularly common in freshwater fishes associated with postglacial lakes northern temperate environments. The nature of divergences between co-occurring sympatric species, factors contributing to reproductive isolation and modes genome evolution is a much debated topic evolutionary biology addressed by various experimental tools. To the best our knowledge, nobody approached this field using molecular cytogenetics. We examined chromosomes genomes one pair,...

10.1186/1471-2148-13-42 article EN cc-by BMC Evolutionary Biology 2013-01-01

The taxonomic status of five nominal species cyprinid fishes from the Middle East is reviewed by applying morphological and molecular (COI) characters. Alburnus populations Iranian Lake Namak basin, Zayandeh River drainage upper Karun are identified as A. doriae. Petroleuciscus esfahani, River, well amirkabiri, synonyms Molecular data support treating mossulensis sellal a single species. As First Revisers we give precedence to over mossulensis.

10.11646/zootaxa.4323.4.3 article EN Zootaxa 2017-09-25

Barbus anatolicus, new species, is described from the Kızılırmak and Yeşilırmak River drainages in southern Black Sea basin. It distinguished other species Middle East by having 58-71 total lateral line scales, a moderately ossified last simple dorsal-fin ray, serrated along about 70-80% of its posterior margin, many small irregular shaped black or brown spots, smaller as large often forming large, dark-brown blotches on head, back flank adults juveniles, concave margin. In addition, DNA...

10.11646/zootaxa.4461.4.5 article EN Zootaxa 2018-08-23

The generic position of Leuciscus kurui Bogutskaya, 1995 is reviewed through a comparison morphological and molecular characters (COI). data place L. in Alburnus, close to Alburnus timarensis from the Lake Van basin. (Bogutskaya) distinguished this species by lacking ventral keel possessing both very low number gill rakers midlateral scales. selcuklui, upper Tigris drainage, cannot be widespread A. sellal therefore treated as synonym species. Mangit & Yerli, 2018 junior secondary homonym...

10.11646/zootaxa.4410.1.6 article EN Zootaxa 2018-04-16

The Oxynoemacheilus tigris species group is reviewed, resulting in the recognition of six species, which two are described herein as new. known from endorheic Qweik River and Merziman River, a tributary western Euphrates. ercisianus endemic to Lake Van basin O. hazarensis Hazar upper Tigris drainage. kaynaki widespread Euphrates undescribed occur arsaniasus, new Murat Karasu (Muş) drainage, distinguished other by having bold, black, irregularly-shaped bar at caudal-fin base, an incomplete...

10.11646/zootaxa.4612.1.2 article EN Zootaxa 2019-05-28

Two new species of Luciobarbus are described from the Mediterranean Sea basin in Morocco and Algeria. Their monophyly phylogenetic placement resolved by molecular analyses using two mitochondrial markers (cyt b D-loop). lanigarensis, species, Tafna River drainage Algeria Morocco, is distinguished having orange fins, a great predorsal length (52–59% SL) very long pectoral fin (79–90% HL). numidiensis, El-Kébir Algeria, golden pectoral-fin margin, 43–47+1–3 lateral line scales anal-fin (19–23%).

10.11646/zootaxa.4433.3.9 article EN Zootaxa 2018-06-13

Cyprinids of the genus Luciobarbus are most abundant and widespread fishes in freshwater ecosystems Maghreb. In Mediterranean basin Morocco, Algeria Tunisia, all species Luciobarbus—with exception L. guercifensis—are superficially very similar distinguished mostly by minor morphometric characters. Molecular characters distinguish well nine recognised from area, two them described here. chelifensis, Chelif River drainage Algeria, is having 41–43+1–2 lateral line scales a short anal fin...

10.11646/zootaxa.4277.1.3 article EN Zootaxa 2017-06-15

Eight species are recognised in the Aphanius dispar group. from Red and Mediterranean Sea basins, A. stoliczkanus coastal areas of Arabian/Persian Gulf, northern Arabian east to Gujarat India, Gulf Oman some endorheic basins Iran Pakistan, richardsoni springs Dead basin Jordan Israel, sirhani Azraq Oasis Jordan, ginaonis one spring Iran, furcatus few streams stiassnyae lake Ethiopia. kruppi, new species, Wadi al Batha drainage Oman, is distinguished adjacent by having 9-14 brown or grey...

10.11646/zootaxa.4338.3.10 article EN Zootaxa 2017-10-26

Aphanius irregularis, new species, is described from the spring Kaklık in Büyük Menderes River drainage south-western Anatolia. Males of A. irregularis are distinguished males other species anatoliae group by having irregularly set and shaped dark-brown flank-bars often fused to each other, forming rows vertically elongated silvery blotches many small spots or fields vermiculation, disconnected bar interspaces on flank. some a wide, dusty grey black anal-fin margin, interrupted individuals;...

10.11646/zootaxa.4410.2.4 article EN Zootaxa 2018-04-17

Oxynoemacheilus zarzianus, new species, is described from the Lesser Zab River drainage, a tributary of lower Tigris. It distinguished other species in Tigris drainage by having slightly emarginate caudal fin, no suborbital groove males, complete lateral line, posterior process bony air-bladder capsule directed posteriorly, flank and part back covered scales, short barbels deep peduncle. fourth known where such loaches seem to be highly isolated headwaters. diversity Euphrates exceptional...

10.11646/zootaxa.4273.2.6 article EN Zootaxa 2017-06-02

Nemacheilid loaches of the genus Oxynoemacheilus are common fishes all over Middle East (Freyhof et al. 2011). From Iran, Jouladeh-Roudbar (2015) recognised 12 species from Iran (O. angorae (Steindachner), O. araxensis (Bănărescu & Nalbant), bergianus (Derjavin), brandtii (Kessler), chomanicus (Kamangar, Prokofiev, Ghaderi frenatus (Heckel), kermanshahensis kiabii (Golzarianpour, Abdoli Freyhof), kurdistanicus Nalban)t, persa tongiorgii (Nalbant Bianco), zagrosensis Nalbant). these,...

10.11646/zootaxa.4175.1.9 article EN Zootaxa 2016-10-12

Garra turcica, from the rivers Kızıl, Seyhan, Ceyhan and Arsuz, is re-diagnosed re-described. The species was treated as a synonym of G. rufa but molecular data strongly suggest that turcica represent an own species. It distinguished by being more slender bodied, having blunt snout usually short rostral cap. Based on COI sequence data, closely related to group Persian Gulf basin, all very small distribution areas nested in or adjacent range rufa. closest relatives are elegans, mondica...

10.11646/zootaxa.4524.2.6 article EN Zootaxa 2018-11-21

Article 16.4. of the International Code for Zoological Nomenclature (ICZN, 1999) requires that fixation name-bearing types a new species to be explicit: "Every specific and subspecific name published after 1999, except replacement name…, must accompanied in original publication 16.4.1. by explicit holotype,…..and 16.4.2. where holotype or syntypes are extant specimens, statement intent they will (or are) deposited collection indicating location collection." That means described finally it is...

10.11646/zootaxa.4550.4.10 article EN Zootaxa 2019-01-29

Abstract The evolutionary relationships of species Danio and the monophyly phylogenetic placement genus within family Cyprinidae subfamily Rasborinae provide fundamentally important phyloinformatics necessary for direct evaluations an array pertinent questions in modern comparative biology. Although is not one most diverse family, rerio model Many investigations have used this or presumed close relatives to address specific that lasting impact on hypothesis theory development vertebrates....

10.1002/jez.b.21175 article EN Journal of Experimental Zoology Part B Molecular and Developmental Evolution 2007-06-06

Lampetra soljani, new species, is described from the lower Neretva River in Adriatic Sea basin. Previously it was identified as L. zanandreai. Based on morphological similarity and mitochondrial genetic data, related to lanceolata ninae Black soljani distinguished all other species of by having a marmorate flank pattern live, fully grown ammocoetes, some adults (vs. plain colour pattern). three velar tentacles, 54-57 trunk myomeres between last branchial opening anus, no posterial teeth...

10.11646/zootaxa.4273.4.4 article EN Zootaxa 2017-06-07
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