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Artykuły w czasopismach na temat "Austrovenus stutchburyi"

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Mouritsen, Kim N., and Robert Poulin. "The risk of being at the top: foot-cropping in the New Zealand cockle Austrovenus stutchburyi." Journal of the Marine Biological Association of the United Kingdom 83, no. 3 (April 9, 2003): 497–98. http://dx.doi.org/10.1017/s0025315403007409h.

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The common phenomenon of sublethal predation in soft-bottom bivalves usually involves nipping of siphons. Here we show that foot cropping, hitherto documented only in Donax spp., is widespread in the New Zealand cockle Austrovenus stutchburyi (Veneridae). Depending on the locality, cropping frequency ranged between 14 and 34% of cockles, and the average proportion of the foot area cropped ranged between nine and 21%. Estimates of biomass lost to croppers at the time of sampling varied between 235 and 2040 mg ww m−2. It is emphasized that foot cropping in Austrovenus is likely to affect the pop
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O’Connell-Milne, Sorrel, Candida Savage, and William Rayment. "The influence of commercial harvesting on parasite infection in the bivalve Austrovenus stutchburyi." Canadian Journal of Fisheries and Aquatic Sciences 73, no. 6 (June 2016): 982–89. http://dx.doi.org/10.1139/cjfas-2015-0401.

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Commercial harvesting often reduces densities of target species, potentially affecting transmission of parasites within the population. Rates of parasitic infection not only impact the hosts directly, but can result in wider ecosystem effects through influences on host behaviour. Commercial harvesting may therefore have important ecological consequences beyond the direct effects of removal of biomass. Clams (Austrovenus stutchburyi) are commonly infected by trematode parasites (Acanthoparyphium spp. and Curtuteria australis) and have been commercially harvested in Otago, New Zealand, since 198
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Anderson, Tara, Henry Barrett, and Don Morrisey. "Effects of sediment deposition on the New Zealand cockle, Austrovenus stutchburyi." New Zealand Journal of Marine and Freshwater Research 53, no. 3 (February 20, 2019): 363–76. http://dx.doi.org/10.1080/00288330.2019.1580751.

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Poulin, R., and K. N. Mouritsen. "Small-scale spatial variation in rates of metacercarial accumulation by a bivalve second intermediate host." Journal of the Marine Biological Association of the United Kingdom 84, no. 6 (November 23, 2004): 1209–12. http://dx.doi.org/10.1017/s0025315404010665h.

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In a field experiment, the accumulation of trematode (Echinostomatidae) metacercariae by the New Zealand cockle Austrovenus stutchburyi was compared among treatments with different seabed hydrodynamics and sedimentation rates. There was no significant difference among the treatments in the rate at which cockles accumulated metacercariae, suggesting that infection rates are not influenced by water flow conditions within the normal range experienced in natural habitats. There was, however, substantial spatial variation in infection rates among the experimental plots. This result indicates that m
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DUNGAN, CHRISTOPHER F., KIMBERLY S. REECE, JESSICA A. MOSS, ROSALEE M. HAMILTON, and BENJAMIN K. DIGGLES. "Perkinsus olseni in vitro Isolates from the New Zealand Clam Austrovenus stutchburyi." Journal of Eukaryotic Microbiology 54, no. 3 (May 2007): 263–70. http://dx.doi.org/10.1111/j.1550-7408.2007.00265.x.

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Athfield, Nancy Beavan, Bruce McFadgen, and Rodger Sparks. "Reliability of Bone Gelatin AMS Dating: Rattus Exulans and Marine Shell Radiocarbon Dates from Pauatahanui Midden Sites in Wellington, New Zealand." Radiocarbon 41, no. 2 (1999): 119–26. http://dx.doi.org/10.1017/s0033822200019470.

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A suite of 6 bone gelatin accelerator mass spectrometry (AMS) radiocarbon dates for Rattus exulans Peale and associated beta decay 14C dates for Austrovenus stutchburyi shell are presented for 4 middens at Pauatahanui, Wellington, New Zealand. Mean calibrated age ranges of Rattus exulans (520–435 BP and 350–330 BP at 95% confidence level) and shell (465–375 BP at 95% confidence level) from the 4 midden sites overlap. The agreement between Rattus exulans bone gelatin dates and associated shell provides an inter-sample comparison of 14C dating using both gas counting (beta decay) and AMS dating
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CUMMINGS, VONDA, JUDI HEWITT, JANE HALLIDAY, and GRAEME MACKAY. "OPTIMIZING THE SUCCESS OF AUSTROVENUS STUTCHBURYI RESTORATION: PRELIMINARY INVESTIGATIONS IN A NEW ZEALAND ESTUARY." Journal of Shellfish Research 26, no. 1 (April 2007): 89–100. http://dx.doi.org/10.2983/0730-8000(2007)26[89:otsoas]2.0.co;2.

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Lundquist, Carolyn J., Conrad A. Pilditch, and Vonda J. Cummings. "Behaviour controls post-settlement dispersal by the juvenile bivalves Austrovenus stutchburyi and Macomona liliana." Journal of Experimental Marine Biology and Ecology 306, no. 1 (July 2004): 51–74. http://dx.doi.org/10.1016/j.jembe.2003.12.020.

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Ishida, Hitoshi, Akira Nozawa, Kazuhiro Totoribe, Norio Muramatsu, Haruo Nukaya, Kuniro Tsuji, Kentaro Yamaguchi, et al. "Brevetoxin B1, a new polyether marine toxin from the New Zealand shellfish, Austrovenus stutchburyi." Tetrahedron Letters 36, no. 5 (January 1995): 725–28. http://dx.doi.org/10.1016/0040-4039(94)02326-7.

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Purchase, Nigel G., and Jack E. Fergusson. "Chione (austrovenus) stutchburyi, a New Zealand cockle, as a Bio-indicator for lead pollution." Environmental Pollution Series B, Chemical and Physical 11, no. 2 (January 1986): 137–51. http://dx.doi.org/10.1016/0143-148x(86)90040-6.

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Rozprawy doktorskie na temat "Austrovenus stutchburyi"

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Simpson, Julia Marie. "Effects of heavy metal contamination on burial rates of Austrovenus stutchburyi implications for sediment transport /." The University of Waikato, 2009. http://hdl.handle.net/10289/2766.

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Urbanisation in coastal catchments has significantly increased not only the input of terrestrial sediment to the marine environment but also the input of contaminants. In Tamaki Estuary, Auckland, heavy metals have accumulated in the upper estuarine muddy sediments and metal contamination has been detected on downstream intertidal sandflats. Sub-lethal levels of heavy metal contamination may affect the growth and behaviour of benthic organisms, which in turn may influence key ecosystem processes and productivity. The aim of this study was to examine whether the burial rate of an ecologicall
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McConway, Alex. "The effects of trace metals on juvenile cockles (Austrovenus stutchburyi)." Thesis, University of Canterbury. Biological Sciences, 2008. http://hdl.handle.net/10092/1696.

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This thesis investigated the population structure and spatial distribution of the cockle Austrovenus stutchburyi in estuaries and bays around the Canterbury coastline. Surveys investigated population attributes (average density and density of small cockles (< 10mm)) of Austrovenus stutchburyi in relation to physical environmental characteristics such as trace metals (copper, cadmium and zinc), sediment particle size, nitrogen and phosphorus levels, pore water and percentage organic matter of the sediment. Surface cover of flora and number of fauna present was also correlated with the density
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Leung, Tommy Ling Fong, and n/a. "Interspecific and intraspecific interactions of trematodes parasitising the New Zealand cockle Austrovenus stutchburyi." University of Otago. Department of Zoology, 2008. http://adt.otago.ac.nz./public/adt-NZDU20090105.160127.

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Most organisms are rarely infected with just a single species of parasite and are usually simultaneously infected with a range of species. Thus, the parasite fauna of a host represents an entire community composed of multiple individuals from many different species. In nature, it is within the host that parasites can encounter conspecifics and individuals from other species. As in any ecosystem, while such interactions between parasites can be antagonistic due to competition or conflicting interests, association between different species can also be beneficial. In this thesis, I investigated
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Adkins, Suzanne Craig. "Population Biology and Restoration of Intertidal Cockle Beds." Thesis, University of Canterbury. School of Biological Sciences, 2012. http://hdl.handle.net/10092/7794.

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There is evidence that infaunal bivalves in New Zealand are not as abundant as they once were with overfishing and habitat modification contributing to the decline in density and health of cockles. The population biology and abundance of the bivalve Austrovenus stutchburyi (tuangi) in eight beds in four estuaries was assessed both seasonally (13 seasons) and annually (7 years) as little is known about the cockle beds in the Canterbury region of New Zealand. As with populations of similar species worldwide, there were site specific differences in population structure (density and size ranges
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De, Luca-Abbott Sharon B. "Effects of contaminants on Austrovenus stutchburyi - using biomarkers to detect sublethal stress." 2000. http://hdl.handle.net/2292/1955.

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This thesis examines sublethal stress responses in the common New Zealand estuarine bivalve, Austrovenus stutchburyi (cockle). The approach used throughout this thesis is a refinement of the biological indicator approach of Adams (1990), in which biomarker data are collected primarily at the individual and sub-organismal levels, but with additional measurements at the population and community levels. In this research several biochemical and physiological biomarkers are used to assess effects of contaminants on energetics, fecundity and growth of cockles. Adenylate energy charge (AEC) and total
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