Résultats de la recherche

1. Whale depredation – Data collection guidelines

   Description / Abstract:  Marine mammal interactions with fisheries are a growing major world-wide ... . Depredation can also have negative impacts on the conservation of recovering marine mammal populations as a ... increase of depredation paired with a lack of research effort could lead towards a threat to the fisheries ... collection framework across fisheries confronted with interactions with odontocetes is important for a better ... ................................................................... 28 Building up a photo-identification catalogue ... ........................................................................ 33 Building up a photo-identification catalogue ... ................................................................................................. 56 2.11. PiNT – a tool for renaming observer photographs at sea ... - Data collection guidelines – April 2016 6 Marine mammal interactions with fisheries are a growing ...

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2. Sea Ice Biota: Trophic modelling of the Ross Sea

   Description / Abstract:  A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet.  2010.  A balanced model of the food web of the Ross Sea, Antarctica ... .: +64 4 386 0369; Fax: +64 4 386 2153 1 Introduction Sea ice is a dominant forcing function in ... and gas exchange and vertical mixing. The upper surface of the ice provides a habitat for a number of ... lower part which is in contact with the water, constitutes a unique habitat for microalgae and bacteria ... which provide a food source for associated microfauna and meiofauna and the cryopelagic fauna of the ...

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3. Phytoplankton: Trophic modelling of the Ross Sea

   Description / Abstract:  A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet.  2010.  A balanced model of the food web of the Ross Sea, Antarctica ... in the Ross Sea form a bimodal distribution: blooms of the prymnesiophyte Phaeocystis antarctica in ... & Arrigo 2006). A large number of studies have investigated why inorganic macronutrients are not ... sensors gives us a method for estimating phytoplankton biomass in the surface waters of the Ross Sea ... visible wavelengths (400– 600 nm). A “bio-optical algorithm” is used to estimate the surface concentration ...

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4. Fishes: Trophic modelling of the Ross Sea

   Description / Abstract:  A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet.  2010.  A balanced model of the food web of the Ross Sea, Antarctica ... trophic modelling because a number of species are amongst the most likely components of the system to be ... the biomass of many of the fish species. The fish fauna can be divided into a coastal (shelf) fauna ... . antarcticum adults (La Mesa et al. 2004b), and a continental slope fauna dominated by macrourids, rajiids ... , and deeper water notothenioids. Sampling on the shelf out to a depth of about 500 m has been carried ...

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5. Benthos: Trophic modelling of the Ross Sea

   Description / Abstract:  A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet.  2010.  A balanced model of the food web of the Ross Sea, Antarctica ... ; Mitchell & Clark 2004; Hanchet et al. 2008). If box or other corers are used, then a much smaller area ... structure of the benthic ecosystem used in this study is based on a widely-used but simple energetic model ... generic bacteria and detrital model groups. We use a definition here of megabenthos >20 mm in size ... , macrobenthos 0.5–20 mm, and meiobenthos <0.5 mm. It is unclear whether a more detailed subdivision of the ...

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6. Bacteria and detritus: Trophic modelling of the Ross Sea

   Description / Abstract:  A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet.  2010.  A balanced model of the food web of the Ross Sea, Antarctica ... detritus in sediments (Kemp 1990; Fabiano et al. 2000b). Here, we assume that a nominal 25% of detrivorous ... been directly predated and have not been excreted as a waste product. It hence includes 2 bodies ... given in a number of papers by Ducklow (Ducklow 1999; Ducklow et al. 2000, 2001; Monticelli et al. 2003 ... phytoplankton bloom by about one month, with standing stocks of bacterial biomass rising from a minimum in late ...

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7. Whales: Trophic modelling of the Ross Sea

   Description / Abstract:  A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet.  2010.  A balanced model of the food web of the Ross Sea, Antarctica ... separate whale trophic compartments. A summary of whale parameters for the Ross Sea is given in Table 1 ... from Sergeant (1969) and has been used by a number of other studies (e.g. Reilly et al. 2004). Daily ... methods. There is a wide range of estimates of daily consumption because of variations in the amount ... found in a “full stomach”, number feeds per day, and the time of sampling relative to feeding ...

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8. Zooplankton: Trophic modelling of the Ross Sea

   Description / Abstract:  A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet.  2010.  A balanced model of the food web of the Ross Sea, Antarctica ... during late summer and early winter, but decrease at a constant rate throughout the winter to a low of 9 ... . According to Nicol et al. (2004) low food abundance during winter leads to a decreased growth rate ... , significantly increased intermoult period, and a switch to carnivorous/detrital diet. This species is more ... were taken using a Hamburg Plankton Net with a mouth opening of 5 m2 using double oblique deployment ...

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9. Seals: Trophic modelling of the Ross Sea

   Description / Abstract:  A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet.  2010.  A balanced model of the food web of the Ross Sea, Antarctica ... areas (e.g., Siniff et al. 1980; Testa & Siniff 1987; Schreer & Testa 1992). A basic review of ... , although a very few reach subantarctic islands as far north as New Zealand and the southern coasts of ... . Stirling 1969; Burns et al. 1998, 1999; Testa & Siniff 1987; Stewart et al. 2003). A relatively stable ... about a further 500 animals on the western side of McMurdo Sound, mostly near the Strand Moraines and ...

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10. Birds: Trophic modelling of the Ross Sea

    Description / Abstract:  A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet.  2010.  A balanced model of the food web of the Ross Sea, Antarctica ... the two methods was 24.6%, with a mean difference of 10.4% (method 1 higher on average). In the ... . This was converted to carbon using a ratio of 0.4 gC/g wet-weight (Vinogradov 1953). In the second ... content of the prey tissue. Assimilation efficiency values for fish and squid of a specialized feeder ... fishing vessels and removed from the region this would also represent a net export of biomass from the ...

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