The effects of habitat size and productivity on food web structure in small aquatic microcosms

  • Spencer M
  • Warren P
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Abstract

Records of sightings since 1960 of gray whales Eschrichtius robustus in Laguna de San Quintin constitute evidence of a consistent summer-presence associated with the population increase of recent years. With a few exceptions, small whales only have been sighted, and it is believed that the whales all entered as yearlings or half-yearlings. There is no evidence that the lagoon is a calving ground, or that any whales have been born there, although at least one small whale appears to reside all year round. The abundance of the amphipod Ampelisca compressa in the lagoon supports the argument that an energetic advantage is achieved by the whales in spending their summers in Mexican waters.

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Authors

  • Matthew Spencer

  • Philip H Warren

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