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  • 1
    Electronic Resource
    Electronic Resource
    Reproduction and larval ecology of the Arctic fish speciesArtediellus atlanticus (Cottidae) (1996)
    Springer
    Polar biology 16 (1996), S. 401-407 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract State of maturity, egg numbers, as well as gonadosomatic index (GSI), and relative fecundity were determined in 209 females of the cottid speciesArtediellus atlanticus. Specimens were caught by Agassiz and bottom trawls during two expeditions of RV “Polarstern” to the shelf off northeast Greenland (ARK VII/2; July/August 1990) as well as to the Barents Sea and the shelf areas surrounding Svalbard (ARK VIII/2 — Arctic EPOS; June/July 1991). Analysis of the state of maturity showed thatA. atlanticus spawns from late summer to autumn. Individuals from northern populations spawn later (November) than those from more southern locations (July to September). The total number of eggs (40–216) was small due to their large diameter and the small size of the fish. The mean GSI of females from the central Barents Sea (36.9±6.5%;n=24) was significantly higher (P〈0.001) than the GSI of females caught off eastern Svalbard (18.7±4.0%;n=14), compared at stage IV of maturity. The mean relative fecundity was significantly higher (P〈0.001) for females of the central Barents Sea (17.9±2.3;n=19) than for females caught on more northern stations east of Svalbard (6.9±1.8;n=17) and north of Svalbard (6.4±0.5;n=7). Individuals ofA. atlanticus that were maintained at 0°C spawned in the aquaria, allowing observation of the development of their eggs and larvae for 1 year. The eggs needed more than 200 days to develop. The larvae hatched at a very advanced stage and were similar to the adults in appearance and behaviour. The larvae grew at a rate of 0.02 mm per day and showed a benthic mode of life.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02390422
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Megabenthic communities in the waters around Svalbard (1996)
    Springer
    Polar biology 16 (1996), S. 431-446 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Composition and distribution of megabenthic communities around Svalbard were investigated in June/July 1991 with 20 Agassiz trawl and 5 bottom trawl hauls in depths between 100 and 2100 m. About 370 species, ranging from sponges to fish, were identified in the catches. Species numbers per station ranged from 21 to 86. Brittle stars, such asOphiacantha bidentata, Ophiura sarsi andOphiocten sericeum, were most important in terms of constancy and relative abundance in the catches. Other prominent faunal elements were eunephthyid alcyonarians, bivalves, shrimps, sea stars and fish (Gadidae, Zoarcidae, Cottidae). Multivariate analyses of the species and environmental data sets showed that the spatial distribution of the megabenthos was characterized by a pronounced depth zonation: abyssal, bathyal, off-shore shelf and fjordic communities were discriminated. However, a gradient in sediment properties, especially the organic carbon content, seemed to superimpose on the bathymetric pattern. Both main factors are interpreted as proxies of the average food availability, which is, hence, suggested to have the strongest influence in structuring megabenthic communities off Svalbard.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02390425
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Reproduction and larval ecology of the Arctic fish species Artediellus atlanticus (Cottidae) (1996)
    Springer
    Polar biology 16 (1996), S. 401-407 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  State of maturity, egg numbers, as well as gonadosomatic index (GSI), and relative fecundity were determined in 209 females of the cottid species Artediellus atlanticus. Specimens were caught by Agassiz and bottom trawls during two expeditions of RV “Polarstern” to the shelf off northeast Greenland (ARK VII/2; July/ August 1990) as well as to the Barents Sea and the shelf areas surrounding Svalbard (ARK VIII/2 – Arctic EPOS; June/July 1991). Analysis of the state of maturity showed that A. atlanticus spawns from late summer to autumn. Individuals from northern populations spawn later (November) than those from more southern locations (July to September). The total number of eggs (40–216) was small due to their large diameter and the small size of the fish. The mean GSI of females from the central Barents Sea (36.9±6.5%; n=24) was significantly higher (P〈0.001) than the GSI of females caught off eastern Svalbard (18.7±4.0%; n=14), compared at stage IV of maturity. The mean relative fecundity was significantly higher (P〈0.001) for females of the central Barents Sea (17.9±2.3; n=19) than for females caught on more northern stations east of Svalbard (6.9±1.8; n=17) and north of Svalbard (6.4±0.5; n=7). Individuals of A. atlanticus that were maintained at 0°C spawned in the aquaria, allowing observation of the development of their eggs and larvae for 1 year. The eggs needed more than 200 days to develop. The larvae hatched at a very advanced stage and were similar to the adults in appearance and behaviour. The larvae grew at a rate of 0.02 mm per day and showed a benthic mode of life.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000050071
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Megabenthic commmunities in the waters around Svalbard (1996)
    Springer
    Polar biology 16 (1996), S. 431-446 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Composition and distribution of megabenthic communities around Svalbard were investigated in June/July 1991 with 20 Agassiz trawl and 5 bottom trawl hauls in depths between 100 and 2100 m. About 370 species, ranging from sponges to fish, were identified in the catches. Species numbers per station ranged from 21 to 86. Brittle stars, such as Ophiacantha bidentata, Ophiura sarsi and Ophiocten sericeum, were most important in terms of constancy and relative abundance in the catches. Other prominent faunal elements were eunephthyid alcyonarians, bivalves, shrimps, sea stars and fish (Gadidae, Zoarcidae, Cottidae). Multivariate analyses of the species and environmental data sets showed that the spatial distribution of the megabenthos was characterized by a pronounced depth zonation: abyssal, bathyal, off-shore shelf and fjordic communities were discriminated. However, a gradient in sediment properties, especially the organic carbon content, seemed to superimpose on the bathymetric pattern. Both main factors are interpreted as proxies of the average food availability, which is, hence, suggested to have the strongest influence in structuring megabenthic communities off Svalbard.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000050074
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
  • 5
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    Unknown
    Habitat specific growth patterns in larval Atlantic herring (Clupea harengus L.) (2013)
    In:  [Talk] In: 37. Annual Larval Fish Conference, 02.-06.06.2013, Miami, USA .
    Details
    Publication Date: 2013-12-13
    Type: Conference or Workshop Item , NonPeerReviewed
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    OceanRep: Talk
  • 6
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    Fischereibiologische Untersuchungen auf der Expedition ARK 8/2 (EPOS II, SEAS) (1992)
    Institut für Polarökologie Kiel
    In:  Mitteilungen zur Kieler Polarforschung, 7 . p. 20.
    Details
    Publication Date: 2017-05-16
    Type: Article , NonPeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - without review
  • 7
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    The effects of periodic marine inflow into the Baltic Sea on the migration patterns of Western Baltic spring-spawning herring (2014)
    Oxford University Press
    Details
    Publication Date: 2014-04-18
    Description: Western Baltic spring-spawning herring (WBSSH, Clupea harengus L.) perform seasonal migrations between feeding grounds in the Skagerrak and Kattegat and their spawning sites in the Western Baltic Sea. The Sound, connecting the Kattegat to the Western Baltic Sea, is an important aggregation and transition zone for this herring stock during its spawning migration. We analysed data from the German autumn acoustic surveys of the years 1993–2009. These data revealed at least two different distribution patterns of herring in autumn: herring generally aggregated in the Sound, but in some years the majority of herring were detected further south, being outside of the Sound by the time of the survey. We tested whether observed annual differences in the herring migration can be explained by either stock characteristics (age and size) or hydrographical variables (salinity and oxygen concentration). Our results suggest that rather than being related to stock characteristics, the distribution pattern of herring was related to environmental conditions, i.e. to marine inflow events into the Baltic Sea. Barotropic inflow events in late summer and early autumn seem to prevent deoxygenation in the Sound and thereby favour the prolonged aggregation of herring in the Sound.
    Print ISSN: 1054-3139
    Electronic ISSN: 1095-9289
    Topics: Biology , Geosciences , Physics
    Published by Oxford University Press
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    PAPER CURRENT
  • 8
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    Nutritional situation for larval Atlantic herring (Clupea harengus L.) in two nursery areas in the western Baltic Sea (2014)
    Oxford University Press
    Details
    Publication Date: 2014-05-20
    Description: The Greifswalder Bodden (GWB) is considered to be the most important spawning and nursery area for the western Baltic spring-spawning herring. However, the biotic and abiotic reasons for this are still unclear. Consequently, we investigated larval growth conditions in the GWB and in the Kiel Canal (KC), another nursery and spawning area of Baltic herring. We investigated prey quantity and quality [copepod abundance and essential fatty acid (EFA) concentration] as well as biochemically derived growth rates and fatty acid content of larval herring in spring 2011. A significant correlation between larval growth and larval EFA concentration could be observed in the GWB. The highest growth rates and EFA concentrations in the larval herring coincided with high food quality. Compensating effects of food quality on food quantity and vice versa could be observed in both the GWB and the KC. While larval growth rates in the KC were high early in the season, highest growth rates in the GWB were achieved late in the season. In conclusion, neither area was superior to the other, indicating similar growth conditions for larval herring within the region.
    Print ISSN: 1054-3139
    Electronic ISSN: 1095-9289
    Topics: Biology , Geosciences , Physics
    Published by Oxford University Press
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    PAPER CURRENT
  • 9
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    Partitioning of benthic community respiration in the Arctic (northwestern Barents Sea) (1995)
    In:  EPIC3Marine Ecology Progress Series, 118, pp. 199-213
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
  • 10
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    Partitioning of benthic community respiration in the Arctic (northwestern Barents Sea) (1995)
    In:  EPIC3Marine ecology-progress series, 118, pp. 199-213
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
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    PAPER (OA)
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