Karl-Hermann Kock

• Dr
• Thünen Institute

This background document is provided the scientific basis, rationale and justification for the evaluation and potential establishment of a marine protected area (MPA) in the Weddell Sea planning area. It has been prepared in accordance with the provisions of the CAMLR Convention and the relevant CCAMLR agreements and measures, such as the general f...

The "Biogeographic Atlas of the Southern Ocean" is a legacy of the International Polar Year 2007-2009 (www.ipy.org) and of the Census of Marine Life 2000-2010 (www.coml.org), contributed by the Census of Antarctic Marine Life (www.caml.aq) and the SCAR Marine Biodiversity Information Network (www.scarmarbin.be; www.biodiversity.aq). The "Biogeograp...

Recent rapid climate change is now well documented in the Antarctic, particularly in the Antarctic Peninsula region. One of the most evident signs of climate change has been ice-shelf collapse; overall, 87% of the Peninsula's glaciers have retreated in recent decades. Further ice-shelf collapse will lead to the loss of existing marine habitats and...

Eisfischen fehlt das Hämoglobin. Sie können den lebenswichtigen Sauerstoff nicht – wie alle anderen Wirbeltiere –, chemisch gebunden, sondern nur in physikalischer Lösung im Blut transportieren. Dies führte zu einer Reihe von Anpassungen, wie einem größeren Herz, einem höheren Blutvolumen und größeren Gefäßdurchmessern, die die Nachteile der gering...

Age and growth of spiny icefish (Chaenodraco wilsoni) were investigated using counts of annual growth increments from sagittal otoliths. Samples were collected during research surveys by benthic trawl carried out off Joinville-D'Urville Islands (Antarctic Peninsula) in February-March 2006 and January 2007. A total of 218 specimens were selected for...

The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) is bound by its Article II, 3 to follow an ecosystem approach to management. This approach has been extended to the application of a precautionary approach in the late 1980s. In our review, we deal primarily with the science-related aspects of CCAMLR and its developme...

Current plans to utilise German offshore waters as sites for windmill parks as well as ongoing investigation of potential areas to implement Natura 2000 have led to an increased research effort on local marine mammal populations. The aim of this study was to determine the spatial distribution of harbour porpoises in the German part of the North Sea...

The former fishing ground off Joinville-D'Urville Islands was revisited in the course of the Antarctic Expedition ANT XIX/3 by RV Polarstern in February 2002. Five hauls were conducted north of the two islands at depths of 149 to 282 m on 21 February 2002. Published and unpublished reports from fishing operations in the 1970s and 1980s by the Fisch...

Mackerel icefish (Champsocephalus gunnari) are widespread on the South Georgia shelf, Antarctica, and have been fished commercially since the early 1970s. They are known to feed predominantly on krill. An index of condition which uses the ratio of the measured total mass to the estimated mass is shown to provide a good indicator of local krill dens...

The area west of the German islands of Sylt and Amrum is considered to be a favourable habitat, as well as an important breeding ground for harbour porpoises. At the same time, the area is utilised by man in a variety of ways. In this study, the idea of an integrated coastal management scheme is discussed, which aims to provide the necessary level...

Stocks of finfish exploited around the South Orkney Islands (Subarea 48.2) suffered substantial declines from split-year 1977/78 to 1989/90. The biomass of several species of finfish has been monitored through scientific bottom trawl surveys within the 500 m isobath of the South Orkney Islands, most recently by the Federal Republic of Germany in 19...

Commercial exploitation of finfish in the southern Scotia Are took place from 1977/78 to 1989/90, and was in its heyday from 1977/78 to 1981/82. Except for Elephant Island, the state of fish stocks of the southern Scotia Are region has been accorded little attention until 1998, despite substantial catches in the first four years of the fishery and...

Finfish stocks in the Antarctic Peninsula region (Subarea 48.1) were exploited from 1978/79 to 1988/89, with most of the commercial harvesting taking place in the first two years of the fishery. Results of bottom trawl surveys conducted by Germany in the vicinity of Elephant Island in the 1980s showed that stocks of Champsocephalus gunnari, Notothe...

The harbour porpoise is the only cetacean known to be incidentally taken by German fishing vessels. This paper reviews data on the by-catch of this species from a reporting scheme based on voluntary compliance by fishermen. More than 95% of the by-catches were taken in set net fisheries. Incidental takes were much better documented for the Western...

The diet composition and feeding intensity of mackerel icefish Champsocephalus gunnari around Shag Rocks and the mainland of South Georgia was analyzed from ca 8700 stomachs collected in January/February 1985, January/February 1991 and January 1992. Main prey items were krill Euphausia superba, the amphipod hyperiid Themisto gaudichaudii, mysids (p...

Fish Stock Assessment Working Group, CCAMLR, Hobart, 25 October–17 November 1989 - Volume 2 Issue 2 - Karl-Hermann Kock

Finfish have been harvested around South Georgia since the end of the 1960s mainly by the Soviet Union. Notothenia rossii marmorata was the target species in the first peak years 1969–71, which yielded about 500 000 tonnes in two seasons. Since 1975/76 fishing has been directed mostly to the icefish Champsocephalus gunnari and to a lesser extent Pa...

Ichthyoplankton collected during six expeditions to the Antarctic Peninsula area between 1975/1976 and 1984/85 was analyzed for patterns of spatial and temporal distribution and interannual variability of abundance. In some species, e.g., Nototheniops larseni, median numbers per 103 m3 varied mostly within one order of magnitude, whereas in others,...

Of about 20,000 modern fish species, only about 200 are found south of the Antarctic Convergence. The ichthyofauna is dominated by small species up to 40 cm long. The majority are bottom dwelling forms which belong mostly to the suborder Notothenioidei. Antarctic pelagic fishes are descendants from several faunal groups of different origins: bathyp...

Pages: 90 p.