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16154 results in Animal behaviour

Page 187 of 808

The Politics of Species
  • Reshaping our Relationships with Other Animals
  • Edited by Raymond Corbey, Annette Lanjouw
  • Published online:
    05 September 2013
    Print publication:
    05 September 2013
  • The assumption that humans are cognitively and morally superior to other animals is fundamental to social democracies and legal systems worldwide. It legitimises treating members of other animal species as inferior to humans. The last few decades have seen a growing awareness of this issue, as evidence continues to show that individuals of many other species have rich mental, emotional and social lives. Bringing together leading experts from a range of disciplines, this volume identifies the key barriers to a definition of moral respect that includes nonhuman animals. It sets out to increase concern, empathy and inclusiveness by developing strategies that can be used to protect other animals from exploitation in the wild and from suffering in captivity. The chapters link scientific data with normative and philosophical reflections, offering unique insight into controversial issues around the ethical, political and legal status of other species.

  • Trophic importance of meiofauna to polychaetes in a seagrass (Zostera marina) bed as traced by stable isotopes

  • Sun_Yong Ha, Won-Ki Min, Dong-Sung Kim, Kyung-Hoon Shin
  • Journal:
    Journal of the Marine Biological Association of the United Kingdom / Volume 94 / Issue 1 / February 2014
    Published online by Cambridge University Press:
    05 September 2013, pp. 121-127

  • Stable carbon and nitrogen isotope ratios of benthic invertebrates and their potential food sources, such as suspended particulate organic matter (POM), benthic microalgae, attached algae and seagrass, were identified in Dong-dae Bay during the winter. The carbon stable isotope ratios demonstrate that filter feeders, such as oysters (−19.5 ± 1.0‰), use benthic microalgae (−21.2 ± 0.2‰) as a major food, and polychaetes such as Glycera spp. (−14.0 ± 0.6 ‰) preferentially use meiofauna, such as nematodes (−14.0 ± 0.4‰) and copepods (−13.3 ± 1.0‰). These meiofauna may feed on mixed resources (including bacteria) with the isotope ratios between benthic microalgae (−21.2 ± 0.2‰) and seagrass (−9.3 ± 01.0‰). These findings are consistent with the trophic enrichment in the nitrogen isotope ratios (by 3–4‰) between consumers and food sources. Moreover, the results of the MixSIR model based on the observed isotope ratios suggest a large seagrass contribution to the food sources of benthic organisms such as meiofauna (~53.7–62.6%) and macrobenthos (~41.1–68%) through the food web. This model additionally suggests a relatively large contribution of benthic microalgae to the food sources of filter feeders (i.e. 26.4% for oysters).

Page 187 of 808