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Capacity for water conservation in invasive (Gerbillus nigeriae) and declining rodents (Taterillus pygargus and Taterillus gracilis) that exhibit climate-induced distribution changes in Senegal

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Title: Capacity for water conservation in invasive (Gerbillus nigeriae) and declining rodents (Taterillus pygargus and Taterillus gracilis) that exhibit climate-induced distribution changes in Senegal
Authors: Thiam, M.1,2, Atteynine, S.A.3, Traoré, S.4, Duplantier, J.-M.5, Maurel, D.6, Sicard, B.7 bruno.sicard@ird.fr
Source: Journal of Arid Environments. Nov2011, Vol. 75 Issue 11, p998-1007. 10p.
Subjects: Gerbils, Water conservation, Zoogeography, Climate change, Competition (Biology), Physiological adaptation, Rodent populations, Species distribution, Animal migration, Water restrictions
Geographic Terms: Senegal
Abstract: Abstract: Following the southward shift of rainfall isolines in the Sahel at the end of the 1960s, Gerbillus nigeriae appeared in northern Senegal in the mid-1990s, and two resident Gerbillidae (Taterillus pygargus and Taterillus gracilis) subsequently declined. We investigated the causal role of the capacity to conserve water in such climate-related shifts in the distribution of these Gerbillidae by comparing the effects of a water-poor diet on the water-efflux rate (W−out) of freshly trapped adults pre-acclimatized to a water-rich diet. During the 12-day period of water restriction in all species, 30–50% of individuals became hyperactive and showed greater weight loss and higher W−out than the remaining inactive individuals. Such emergence of migratory strategists within populations could accelerate the expansion of G. nigeriae. On a water-poor diet, T. gracilis showed a lower capacity to conserve water (higher W−out) than T. pygargus and G. nigeriae, in both inactive (W−out = 44.5 ± 1.8 vs 29.6 ± 0.8 vs 27.4 ± 0.7 ml kg−0.82.day−1, respectively) and hyperactive individuals (W−out = 60.4 ± 1 vs 45.4 ± 0.7 vs 44 ± 0.8 ml kg−0.82.day−1, respectively). We propose that the capacity to conserve water accounted for both expansion of G. nigeriae and decline of T. gracilis, whereas competition between T. pygargus and G. nigeriae could account for the decline of T. pygargus. [Copyright &y& Elsevier]
Copyright of Journal of Arid Environments is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Capacity for water conservation in invasive (Gerbillus nigeriae) and declining rodents (Taterillus pygargus and Taterillus gracilis) that exhibit climate-induced distribution changes in Senegal
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  Data: <searchLink fieldCode="AR" term="%22Thiam%2C+M%2E%22">Thiam, M.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Atteynine%2C+S%2EA%2E%22">Atteynine, S.A.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Traoré%2C+S%2E%22">Traoré, S.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Duplantier%2C+J%2E-M%2E%22">Duplantier, J.-M.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Maurel%2C+D%2E%22">Maurel, D.</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Sicard%2C+B%2E%22">Sicard, B.</searchLink><relatesTo>7</relatesTo><i> bruno.sicard@ird.fr</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Arid+Environments%22">Journal of Arid Environments</searchLink>. Nov2011, Vol. 75 Issue 11, p998-1007. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Gerbils%22">Gerbils</searchLink><br /><searchLink fieldCode="DE" term="%22Water+conservation%22">Water conservation</searchLink><br /><searchLink fieldCode="DE" term="%22Zoogeography%22">Zoogeography</searchLink><br /><searchLink fieldCode="DE" term="%22Climate+change%22">Climate change</searchLink><br /><searchLink fieldCode="DE" term="%22Competition+%28Biology%29%22">Competition (Biology)</searchLink><br /><searchLink fieldCode="DE" term="%22Physiological+adaptation%22">Physiological adaptation</searchLink><br /><searchLink fieldCode="DE" term="%22Rodent+populations%22">Rodent populations</searchLink><br /><searchLink fieldCode="DE" term="%22Species+distribution%22">Species distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Animal+migration%22">Animal migration</searchLink><br /><searchLink fieldCode="DE" term="%22Water+restrictions%22">Water restrictions</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Senegal%22">Senegal</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract: Following the southward shift of rainfall isolines in the Sahel at the end of the 1960s, Gerbillus nigeriae appeared in northern Senegal in the mid-1990s, and two resident Gerbillidae (Taterillus pygargus and Taterillus gracilis) subsequently declined. We investigated the causal role of the capacity to conserve water in such climate-related shifts in the distribution of these Gerbillidae by comparing the effects of a water-poor diet on the water-efflux rate (W−out) of freshly trapped adults pre-acclimatized to a water-rich diet. During the 12-day period of water restriction in all species, 30–50% of individuals became hyperactive and showed greater weight loss and higher W−out than the remaining inactive individuals. Such emergence of migratory strategists within populations could accelerate the expansion of G. nigeriae. On a water-poor diet, T. gracilis showed a lower capacity to conserve water (higher W−out) than T. pygargus and G. nigeriae, in both inactive (W−out = 44.5 ± 1.8 vs 29.6 ± 0.8 vs 27.4 ± 0.7 ml kg−0.82.day−1, respectively) and hyperactive individuals (W−out = 60.4 ± 1 vs 45.4 ± 0.7 vs 44 ± 0.8 ml kg−0.82.day−1, respectively). We propose that the capacity to conserve water accounted for both expansion of G. nigeriae and decline of T. gracilis, whereas competition between T. pygargus and G. nigeriae could account for the decline of T. pygargus. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Arid Environments is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.jaridenv.2011.04.029
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 10
        StartPage: 998
    Subjects:
      – SubjectFull: Gerbils
        Type: general
      – SubjectFull: Water conservation
        Type: general
      – SubjectFull: Zoogeography
        Type: general
      – SubjectFull: Climate change
        Type: general
      – SubjectFull: Competition (Biology)
        Type: general
      – SubjectFull: Physiological adaptation
        Type: general
      – SubjectFull: Rodent populations
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      – SubjectFull: Species distribution
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      – SubjectFull: Animal migration
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      – SubjectFull: Water restrictions
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      – SubjectFull: Senegal
        Type: general
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      – TitleFull: Capacity for water conservation in invasive (Gerbillus nigeriae) and declining rodents (Taterillus pygargus and Taterillus gracilis) that exhibit climate-induced distribution changes in Senegal
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              Text: Nov2011
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