309 resultados para Fr. Robert F. Drinan
Resumo:
Zebrafish (Danio rerio) embryos have been used to quantify the teratogenic potential of environmental samples and harmful substances respectively. The short spawning interval renders this species a good test organism in toxicological research. Due to the transparency of the eggs several lethal and non-lethal endpoints can be detected in parallel after 48 h of embryonic development. Zebrafishembryos have been shown to be sensitive to a number of environmental relevant contaminants, as well as to ex-tracts from polluted sediments
Resumo:
Die 26. Sitzung des Codex-Alimentarius-Komitees fr Fische und Fischerzeugnisse fand vom 13. bis 17.Oktober 2003 in Aales und, Norwegen, statt. Die Tagung wurde von 130 Delegierten und Beobachtern aus 47 Mitgliedsstaaten und 5 internationalen Organisationen besucht. Die größten Delegationen stellten Deutschland(7), Thailand (7), Japan (8), USA (11) und Norwegen als Gastgeber (14). Die deutsche Delegation wurde von Dr. Markus Brill (BMVEL) geleitet. Weitere Mitgliederwaren Prof. Jörg Oehlenschläger (BFAFi, Sprecher), Dr. Kristina Ravelhofer-Rotheneder (BMVEL), Dr. Reinhard Schubring (BFAFi), Dr. Mathias Keller (Bundesmarktverband der deutschen Fischindustrie und des Fischgroßhandels e.V.), Petra Weigl (Pickenpack-Hussmann und Hahn Seafood GmbH) und Dr. Ralf Peter Pund (BfR). Die Sitzung, die von Janne Johnson, Staatssekretärin im norwegischen Fischereiministerium, eröffnet wurde, leitete Dr. Bjørn Rothe Knudtsen, Regionaldirektor des norwegischen Direktorats fr Fischerei und Aquakultur, Trondheim.
Resumo:
The reproduction biology of cod is one of the main re-search topics of the Institute of Baltic Sea Fisheries at Rostock. It was defined 10 years ago when the Institute was formed. Since then results have been published in a number of publications. This paper summarizes the main results of the past decade ant outlines necessities for future research in cod reproduction biology in the Baltic Sea.
Resumo:
Die 25. Sitzung des Komitees fr Fische und Fischereierzeugnisse fand vom 3. bis 7. Juni 2002 in Aales und, Norwegen, statt. Die Tagung wurde von 131 Delegierten und Beobachtern aus 41 Mitgliedsstaaten und 2 internationalen Organisationen sowie FAO- und WHO-Personal (4)besucht. Die größten Delegationen stellten Frankreich (7), Thailand (7), USA (10) und Norwegen als Gastgeber (13).Die deutsche Delegation wurde von Dr. Achim Viereck(BMVEL) geleitet. Weitere Mitglieder waren Prof. Jörg Oehlenschläger (BFAFi, Sprecher), Dr. Andrea Sanwidi (BMVEL), Dr. Reinhard Schubring (BFAFi), Dr. Günter Klein (BgVV) und Dr. Jörn Scabell (Frozen Fish International als Vertreter des Bundesverbandes der deutschen Fischindustrie und des Fischgroßhandels). Die Sitzung, die von Peter Gullestad, dem norwegischen Generaldirektor fr Fischerei, eröffnet wurde, leitete Dr. Bjorn Rothe Knudtsen, Regionaldirektor des norwegischen Direktorats fr Fischerei und Aquakultur, Trondheim.
Resumo:
Die Grundschleppnetzfischerei in der Ostsee konzentriert sich im wesentlichen auf den Fang von Dorsch- und Plattfisch. Neben der Dorschfischerei gibt es auch beim Fang von Plattfisch gebiets- und zeitweise erhebliche Beifnge an untermaßigen Fischen, die verworfen werden müssen. Fr beide in Form und Verhalten sehr unterschiedlichen Fischarten können bis dato die gleichen Steerte eingesetzt werden. Um die durch diese Mix-Fischerei an der südlichen Ostseeküste gegebenen Probleme zu verdeutlichen und auf eine zukünftig differenzierte Behandlung fr die technischen Maßnahmen zur Verbesserung der Selektivität hinzuwirken, werden seit 1998 vergleichende Untersuchungen mit Schleppnetzsteerten unterschiedlicher Konstruktion durchgefhrt.
Resumo:
Entsprechend dem Rahmenkonzept fr die Bundesforschungsanstalten im Geschäftsbereich des damaligen Bundesministeriums fr Ernährung, Landwirtschaft und Forsten vom 12. 6. 1996 ist an der Bundesforschungsanstalt fr Fischerei in Hamburg die Anzahl der Institute von fnf auf vier zu reduzieren. Das ab 1. 1. 2001 neu gebildete Institut fr Fischereitechnik und Fischqualität (IFF) nimmt die Forschungsaufgaben der beiden bisherigen Institute fr Fischereitechnik (IFH) sowie Biochemie und Technologie (IBT) wahr. Damit bietet sich fr das aus zweivergleichsweise kleinen Instituten hervorgegangene IFF die Möglichkeit, in einem integrierten Ansatz Fische, Krebse und Weichtiere auf verschiedenen Stufen der Produktions- und Verarbeitungskette zu untersuchen und zu bewerten. Fangprozess und Folgebehandlung der Fangobjekte werden dadurch ganzheitlich betrachtet, was sich nicht zuletzt in Maßnahmen zur Qualitätserhaltung und -verbesserung von Fischen und Fischereierzeugnissen niederschlagen soll.
Resumo:
During the autumn session of the ICES Advisory Committee for Fisheries Management (ACFM) the stock of the Arctic, Northern and Southern Shelf, North Sea and Skagerrak have been analysed and assessed, as well as the mackerel and horse mackerel, sardine, anchovy and Pandalus, eel and harp and hooded seals. For a number of stocks ICES recommends a reduction in fishing mortality. Moreover, ICES recommends for many stocks to establish recovery and management plans, to safe guarda continuous development of the stocks towards safe biological limits.
Resumo:
The presentation includes investigations and results regarding Baltic flatfish selectivity with different trawl codend constructions. These investigations were carried out 1999/ 2000 on board of FRV “Clupea” and a commercial 17 m cutter. As could be shown, both an enlarged mesh size and another mesh form than rhombic can improve the selectivity of these fish. As flatfish catches with trawls mostly also cover cod, this mixed fishery at the southern Baltic coast should in future be managed by differentiated technical regulations for an improved selectivity. The results, also based on UW observations, current measurements, and wind tunnel tests with models, demonstrate some possible technical solutions.
Resumo:
The spring session of ACFM gave advice for a number of stocks in the North Atlantic, North Sea and Baltic. The present assessment of the situation is given here for stocks of importance for the German fishery. These are: Blue Whiting: the stock size is rapidly decreasing due to high catches; ICES recommends a closure of the fishery. Herring (Atlanto-Scandian, Norwegian spring spawner): Stock is within save biological limits, weak recruitment of the recent years will lead to a further reduction of biomass. Herring (North Sea): revision of the assessment led to a different perception of the stock: SSB was in 2000 below Blim. Excellent recruitment will lead to an increase of SSB over Blim within this year, but ICES recommends to reduce fishing mortality on adults significantly. Herring (Baltic spring spawner in 22–24, IIIa): Still no increasing tendency is detectable. Herring (VIaNorth): stable. Redfish: generally further decreasing tendency observed, a reduction of the fishery is recommended. Signs of recovery visible only for two units. Greenland Halibut: State of the stock not quite clear, but slightly positive tendencies. The present fishing intensity should be reduced. Cod (Kattegat): Weak recruitment, outside safe biological limits. ICES recommends a closure of the fishery. Cod (22–24, Western Baltic): Stock situation unclear due to extensive migrations. F should be reduced by at least 10%.
Resumo:
Während der 483. Reise von FFK “Solea“ (24.10. bis 9.11.01) wurde wie in jedem Herbst die Nachwuchssituation von Kabeljau in der Deutschen Bucht untersucht. Der dabei berechnete Index hat sich in seiner 20-jährigen Laufzeit als relativ verlässliches Maß fr die Abschätzung der Stärke des jeweils jüngsten Jahrgangs erwiesen.
Resumo:
Since 1999, the ICES Working Group on the Assessment of Demersal Stocks in the North Sea and Skagerrak assesses the saithe stock in the North Sea, Skagerrak and west of Scotland as a single stock unit. The sampling, evaluation and role of biological data from the German saithe fishery in the assessment are described. The German data showed similar trends as observed in French and Norwegian series. Based on these estimates, the spawning stock recovered to more than 200 000 t due to reductions in quotas and exploitation rates. Thus, the production of the stock increased also in combination with good recruitment and positive trends in spawning stock size and landings were projected for 2002. The biological data derived from the German saithe fishery dominated the assessment of stock size, structure and exploitation. This fact encourages a continuation of the described analyses based on sampling onboard fishing vessels and fish markets by the Institute for Sea Fisheries. The successful collaboration with the saithe fishing industry is judged as an important contribution to the sustainable management of fish stocks.
Resumo:
Im Oktober/November des vergangenen Jahres ergab sich während der 483. Reise von FK „Solea“ ein im Vergleich zu den vier Vorjahren hoher Fangindex von 220 Kabeljau Gadus morhua je Stunde (Weber 2001). Die Fische hatten eine Länge von 15 bis18 cm und waren besonders in Küstennähe Ostfrieslands anzutreffen. Durch unsere Langzeituntersuchungen zur Ökologie der Flussseeschwalbe Sterna hirundo im Wattenmeer sind wir bereits im Juni des Jahres 2001 auf den starken Jahrgang des Kabeljaus aufmerksam geworden und können die Vermutung von Weber bestätigen, dass die Kabeljaus den Sommer über im Wattengebiet herangewachsen sind.
Resumo:
From 1979 to 2000, the site for the dumping of low-level radioactive wastes and an unaffected site in the North-east Atlantic were investigated to determine the biomass data of the benthopelagic nekton and the benthic organisms. The investigation shall demonstrate the influence on the biocoenosis of the so-called "artificial reef effect", caused by dumped waste drums. For sampling benthopelagic and benthic organisms, we used a modified Agassiz trawl, called the Deep-sea Closing Net. With the exception of the “Amperima event” in 1996 – a unique occurrence of a large number of sea-cucumbers – there was no change in the composition of benthopelagic and benthic organisms through the years. The biomass of the benthopelagic nekton was characterized by Macrouridae(rat-tailed fishes) and the main tax on of the benthos was Actiniaria (sea-anemones).
Resumo:
The herring of the Baltic Sea shows a complicated population structure. Comparable to herring in other areas it can also be discriminated as spring and autumn spawning herring. Autumn spawning herring has been nearly vanished since the late 1960’s. Baltic Sea spring spawning herring show a broad variety as far as morphometric and other biological characteristics are concerned. It seems not very likely that all those differences are genetically based. The spawning sites of populations are, however, often clearly separated and such groups of herring are in most cases characterized by distinct differences in individual growth. Therefore for assessment purposes it is necessary to distinguish between as small as possible units in order to not endanger smaller populations to become extinct by overexploitation. On the other hand migrations and mixing of herring of different origin especially during the summer feeding period result in extreme difficulties of the discrimination of small units. For this reason only three herring assess ment units have been identified for the central and the northern Baltic Sea: herring in Sub-divisions 25–32+32, herring in Sub-division 30 and herring in Sub-division31. The spring spawning herring of the western Baltic Sea has been combined with spring spawning herring in Division IIIa. Only the herring stock in Sub-division 30 shows a positive development in the past. The largest assessment unit in Sub-divisions 25–29+32 decreased continuously during the whole period 1974–1998. The western Baltic Spring spawning herring stock decreased from 1990 to 1996. There is an ongoing debate on scientific level whether the combination of small populations into large assessment units like the one in S-D’s 25–29&32 might include the danger of the extinction of small compartments of the unit. On the other hand the practice by the International Baltic Sea Fishery Commission of managing the Baltic Sea herring fisheries by dividing a yearly Total Allowable Catch for the whole area among fishery zones without taking care of any biological structure and any individual stock development is totally against the idea of sustainability of fisheries.
Resumo:
The introduction of a long-term management plan for the cod socks by the International Baltic Sea Fishery Commission (IBSFC) to ensure stable and high yields and to conserve the fish stocks of the Baltic demands certain conservation measures. One is the use of the Total Allowable Catches (TACs) based on precautionary approches. In addition the exploitation pattern and the selectivy of trawls shall be improved to increase the spawning stock biomass and to reduce the presently high discard rates. The contributation demonstrates by means of model calculations for the cod stock of the ICES Sub-divisions 22 to 24 ( Western Baltic ) the short- and long-term effects of an improvement of the trawl selectivity on stock size, yields and profit.