Robert Patzner | University of Salzburg (original) (raw)
Papers by Robert Patzner
The existing molluscan assemblage of the FFH species Anisus vorticulus at Lake Obertrumersee (Sal... more The existing molluscan assemblage of the FFH species Anisus vorticulus at Lake Obertrumersee (Salzburg, Austria) is presented. The Anisus population is evaluated as “good”. Limnochemical parameters were taken. A distribution map shows the present and former findings of this species in Austria. The malacocoenosis from Lake Obertrumersee is discussed in comparison with other findings in Austria and Germany.
Acta Zoologica, 1978
ABSTRACT Abstract The development of eggs and the degeneration of ovulated follicles in Eptatretu... more ABSTRACT Abstract The development of eggs and the degeneration of ovulated follicles in Eptatretus burgeri was studied over a period of one year. It was found that small resting eggs with a diameter of about 1.5 mm continue to grow in November. By the spawning season in October of the following year, the follicles attain a length of about 24 mm. Only one fertilized egg containing an embryo of 7.5 mm length was obtained. The ratio of males to females was found to vary throughout the year. The annual increase of body length in correlation to ovarian development in the hagfish is calculated to be 4 to 5 cm.
The Open Fish Science Journal, 2008
... In the Maldives, A. clarkii and A. nigripes were found together in Heteractis magnifica and .... more ... In the Maldives, A. clarkii and A. nigripes were found together in Heteractis magnifica and ... for the financial support and Karen and Wolfgang Loch for the organization of the ... Coexistence of nine anemonefish species: differential host and habitat utilization, size and recruitment. ...
Zoology in the Middle East, 2012
ABSTRACT Nine shrimp-goby species (Amblyeleotris steinitzi, A. sungami, Cryptocentrus caeruleopun... more ABSTRACT Nine shrimp-goby species (Amblyeleotris steinitzi, A. sungami, Cryptocentrus caeruleopunctatu0, C. cryptocentrus, C. lutheri, Ctenogobiops maculosus, Lotilia graciliosa, Tomiyamichthys latruncularius, Vanderhorstia delagoae) were found at the fringing reefs around Dahab and in Nabq National Park, Egypt. Abundances vary, depending on the size of the biotope and the number of available microhabitats at five investigated scuba-diving spots.
Aquaculture, 1984
ABSTRACT
Parasite (Paris, France), 2003
Fascioliasis by Fasciola hepatica is the vector-borne disease presenting the widest latitudinal, ... more Fascioliasis by Fasciola hepatica is the vector-borne disease presenting the widest latitudinal, longitudinal and altitudinal distribution known. F. hepatica shows a great adaptation power to new environmental conditions which is the consequence of its own capacities together with the adaptation and colonization abilities of its specific vector hosts, freshwater snails of the family Lymnaeidae. Several lymnaeid species only considered as secondary contributors to the liver fluke transmission have, however, played a very important role in the geographic expansion of this disease. Many of them belong to the so-called "stagnicoline" type group. Stagnicolines have, therefore, a very important applied interest in the Holarctic region, to which they are geographically restricted. The present knowledge on the genetics of stagnicolines and on their parasite-host interrelationships is, however, far from being sufficient. The present paper analyses the relationships between Palaearc...
Zeitschrift für Kinderchirurgie: organ der Deutschen, der Schweizerischen und der Osterreichischen Gesellschaft für Kinderchirurgie = Surgery in infancy and childhood
The article reports on six children with complete incontinence. Two patients had lumbar myelomeni... more The article reports on six children with complete incontinence. Two patients had lumbar myelomeningocele, whereas four had a supralevatory anorectal atresia. They were given a modified sphincter substitute graft by means of the m. gracilis. Proof of full functional ability of the "neosphincter" is supplied via manometrical and electron microscope studies.
European Surgery, 1982
ABSTRACT
Journal of Submicroscopic Cytology and Pathology, 1997
Cybium International Journal of Ichthyology, 1995
Aquaculture, Apr 15, 1992
Lahnsteiner, F., Weismann, T. and Patzner, R.A., 1992. Fine structural changes in spermatozoa of ... more Lahnsteiner, F., Weismann, T. and Patzner, R.A., 1992. Fine structural changes in spermatozoa of the grayling, Thymallus thymallus (Pisces: Teleostei ), during routine cryopreservation. Aquaculture:
Http Dx Doi Org 10 1080 11250009409355872, Jan 28, 2009
ABSTRACT Zosterisessor ophiocephalus is subject to remarkable fishing effort even during the repr... more ABSTRACT Zosterisessor ophiocephalus is subject to remarkable fishing effort even during the reproductive period. Therefore, basic knowledge of its biology is an essential preliminary to any attempt to manage either natural or artificial reproductive stocks. This study is meant to provide a basis for identifying reproductive stages and for relating them to the natural seasonal cycle or to the effect of treatments for promoting maturation. Oocyte staging was performed on conventional thick and TEM sections. Previtellogenic, vitellogenic and maturative stages were further subdivided according to the classic criteria such as meiotic chromosome pairing, nucleus and nucleolus appearance and position, Balbiani's body formation, occurrence and storage of yolk granules as summarized in Table I. Development of theca and granulosa cells was also taken into account. Attaching filament formation and chorionic micropylar specializations are described by TEM and SEM. The results are compared with a previous approximate LM description in this species and with the more recent ultrastructural features reported in gobies and in other teleosteans.
Reprod Nutr Develop, 1995
The ovarian fluid of rainbow trout (Oncorhynchus mykiss), charr (Salvelinus alpinus), lake trout ... more The ovarian fluid of rainbow trout (Oncorhynchus mykiss), charr (Salvelinus alpinus), lake trout (Salmo trutta f lacustris) and Danube salmon (Hucho hucho) was analyzed for its inorganic and organic composition. The qualitative composition of the ovarian fluid of the investigated species was similar, but significant quantitative differences were found. The following components were determined: sodium 106.6-142.2 mmol/l, potassium 1.7-2.7 mmol/l, calcium 0.45-0.61 mmol/l, osmolality 256.4-291.6 mosmol/kg, pH 8.4-8.8, glucose 1,698-4,195 mumol/l, fructose 17-399 mumol/l, lactate 34-227 mumol/l, cholesterol 650-1,230 mumol/l, phosphatidylcholine 0.25-3.0 mumol/l, lysophosphatidylcholine 10-100 mumol/l, choline 0-1.1 mumol/l, protein 95.0-278.4 mg/100 ml. Arginine, cystine, glycine, histidine, lysine, proline, serine, tyrosine and valine were the free amino acids occurring in concentrations of more than 10 mumol/l. Activities of alkaline phosphatase (200-6,000 mumol substrate/l/h), lactate dehydrogenase (9-690 mumol substrate/l/h), beta-D-glucuronidase (70-410 mumol substrate/l/h), proteases (140-215 mumol/l/h with collagen substrate, 25-90 mumol/h/l with gelatine substrate) and acid phosphatase (100-130 mumol substrate/l/h) were measured, but not the glucose-6-phosphate dehydrogenase and alpha-glucosidases activities.
The Biology of Gobies, 2011
The Biology of Gobies, 2011
The existing molluscan assemblage of the FFH species Anisus vorticulus at Lake Obertrumersee (Sal... more The existing molluscan assemblage of the FFH species Anisus vorticulus at Lake Obertrumersee (Salzburg, Austria) is presented. The Anisus population is evaluated as “good”. Limnochemical parameters were taken. A distribution map shows the present and former findings of this species in Austria. The malacocoenosis from Lake Obertrumersee is discussed in comparison with other findings in Austria and Germany.
Acta Zoologica, 1978
ABSTRACT Abstract The development of eggs and the degeneration of ovulated follicles in Eptatretu... more ABSTRACT Abstract The development of eggs and the degeneration of ovulated follicles in Eptatretus burgeri was studied over a period of one year. It was found that small resting eggs with a diameter of about 1.5 mm continue to grow in November. By the spawning season in October of the following year, the follicles attain a length of about 24 mm. Only one fertilized egg containing an embryo of 7.5 mm length was obtained. The ratio of males to females was found to vary throughout the year. The annual increase of body length in correlation to ovarian development in the hagfish is calculated to be 4 to 5 cm.
The Open Fish Science Journal, 2008
... In the Maldives, A. clarkii and A. nigripes were found together in Heteractis magnifica and .... more ... In the Maldives, A. clarkii and A. nigripes were found together in Heteractis magnifica and ... for the financial support and Karen and Wolfgang Loch for the organization of the ... Coexistence of nine anemonefish species: differential host and habitat utilization, size and recruitment. ...
Zoology in the Middle East, 2012
ABSTRACT Nine shrimp-goby species (Amblyeleotris steinitzi, A. sungami, Cryptocentrus caeruleopun... more ABSTRACT Nine shrimp-goby species (Amblyeleotris steinitzi, A. sungami, Cryptocentrus caeruleopunctatu0, C. cryptocentrus, C. lutheri, Ctenogobiops maculosus, Lotilia graciliosa, Tomiyamichthys latruncularius, Vanderhorstia delagoae) were found at the fringing reefs around Dahab and in Nabq National Park, Egypt. Abundances vary, depending on the size of the biotope and the number of available microhabitats at five investigated scuba-diving spots.
Aquaculture, 1984
ABSTRACT
Parasite (Paris, France), 2003
Fascioliasis by Fasciola hepatica is the vector-borne disease presenting the widest latitudinal, ... more Fascioliasis by Fasciola hepatica is the vector-borne disease presenting the widest latitudinal, longitudinal and altitudinal distribution known. F. hepatica shows a great adaptation power to new environmental conditions which is the consequence of its own capacities together with the adaptation and colonization abilities of its specific vector hosts, freshwater snails of the family Lymnaeidae. Several lymnaeid species only considered as secondary contributors to the liver fluke transmission have, however, played a very important role in the geographic expansion of this disease. Many of them belong to the so-called "stagnicoline" type group. Stagnicolines have, therefore, a very important applied interest in the Holarctic region, to which they are geographically restricted. The present knowledge on the genetics of stagnicolines and on their parasite-host interrelationships is, however, far from being sufficient. The present paper analyses the relationships between Palaearc...
Zeitschrift für Kinderchirurgie: organ der Deutschen, der Schweizerischen und der Osterreichischen Gesellschaft für Kinderchirurgie = Surgery in infancy and childhood
The article reports on six children with complete incontinence. Two patients had lumbar myelomeni... more The article reports on six children with complete incontinence. Two patients had lumbar myelomeningocele, whereas four had a supralevatory anorectal atresia. They were given a modified sphincter substitute graft by means of the m. gracilis. Proof of full functional ability of the "neosphincter" is supplied via manometrical and electron microscope studies.
European Surgery, 1982
ABSTRACT
Journal of Submicroscopic Cytology and Pathology, 1997
Cybium International Journal of Ichthyology, 1995
Aquaculture, Apr 15, 1992
Lahnsteiner, F., Weismann, T. and Patzner, R.A., 1992. Fine structural changes in spermatozoa of ... more Lahnsteiner, F., Weismann, T. and Patzner, R.A., 1992. Fine structural changes in spermatozoa of the grayling, Thymallus thymallus (Pisces: Teleostei ), during routine cryopreservation. Aquaculture:
Http Dx Doi Org 10 1080 11250009409355872, Jan 28, 2009
ABSTRACT Zosterisessor ophiocephalus is subject to remarkable fishing effort even during the repr... more ABSTRACT Zosterisessor ophiocephalus is subject to remarkable fishing effort even during the reproductive period. Therefore, basic knowledge of its biology is an essential preliminary to any attempt to manage either natural or artificial reproductive stocks. This study is meant to provide a basis for identifying reproductive stages and for relating them to the natural seasonal cycle or to the effect of treatments for promoting maturation. Oocyte staging was performed on conventional thick and TEM sections. Previtellogenic, vitellogenic and maturative stages were further subdivided according to the classic criteria such as meiotic chromosome pairing, nucleus and nucleolus appearance and position, Balbiani's body formation, occurrence and storage of yolk granules as summarized in Table I. Development of theca and granulosa cells was also taken into account. Attaching filament formation and chorionic micropylar specializations are described by TEM and SEM. The results are compared with a previous approximate LM description in this species and with the more recent ultrastructural features reported in gobies and in other teleosteans.
Reprod Nutr Develop, 1995
The ovarian fluid of rainbow trout (Oncorhynchus mykiss), charr (Salvelinus alpinus), lake trout ... more The ovarian fluid of rainbow trout (Oncorhynchus mykiss), charr (Salvelinus alpinus), lake trout (Salmo trutta f lacustris) and Danube salmon (Hucho hucho) was analyzed for its inorganic and organic composition. The qualitative composition of the ovarian fluid of the investigated species was similar, but significant quantitative differences were found. The following components were determined: sodium 106.6-142.2 mmol/l, potassium 1.7-2.7 mmol/l, calcium 0.45-0.61 mmol/l, osmolality 256.4-291.6 mosmol/kg, pH 8.4-8.8, glucose 1,698-4,195 mumol/l, fructose 17-399 mumol/l, lactate 34-227 mumol/l, cholesterol 650-1,230 mumol/l, phosphatidylcholine 0.25-3.0 mumol/l, lysophosphatidylcholine 10-100 mumol/l, choline 0-1.1 mumol/l, protein 95.0-278.4 mg/100 ml. Arginine, cystine, glycine, histidine, lysine, proline, serine, tyrosine and valine were the free amino acids occurring in concentrations of more than 10 mumol/l. Activities of alkaline phosphatase (200-6,000 mumol substrate/l/h), lactate dehydrogenase (9-690 mumol substrate/l/h), beta-D-glucuronidase (70-410 mumol substrate/l/h), proteases (140-215 mumol/l/h with collagen substrate, 25-90 mumol/h/l with gelatine substrate) and acid phosphatase (100-130 mumol substrate/l/h) were measured, but not the glucose-6-phosphate dehydrogenase and alpha-glucosidases activities.
The Biology of Gobies, 2011
The Biology of Gobies, 2011
In den Flussstauseen am unteren Inn im bayerisch-österreichischen Grenzgebiet leben die drei heim... more In den Flussstauseen am unteren Inn im bayerisch-österreichischen Grenzgebiet leben die drei heimischen Großmuschelarten Anodonta anatina, A. cygnea, Unio pictorum und seit einigen Jahren auch Sinanodonta woodiana, die aus Asien eingeschleppt wurde. In einem für den unteren Inn ganz typischen Stauraum brachte es S. woodiana in ca. 10 Jahren Etablierungszeit auf eine relative Abundanz von vier Prozent. Die Häufigkeit der vier Najaden-Arten hängt sehr stark vom Charakter des jeweiligen Habitats ab, denn in jedem Teillebensraum ist eine andere Art der Konkurrenz überlegen. In den eindeutigen U.pictorum-Habitaten, den nahrungsarmen Gewässerabschnitten mit mäßiger Strömung, fehlen S. woodiana und A. cygnea gänzlich. In eutrophen Seiten- und Altarmen sind sie die lokal dominierenden Arten. A. anatina zeigt sich am unteren Inn als Allrounder, der gemäß eines ökologischen Generalisten fast überall vorkommt, jedoch klare Präferenzen für nahrungsreiche Abschnitte vorweist.
Die Stauseen am unteren Inn, Musterbeispiele naturnahen Wasserbaus, stellen aufgrund ihrer experimentellen Dauerfunktion in vielerlei Hinsicht geradezu ideale Modelle dar, um beobachten zu können, sie sich Lebensgemeinschaften formen.