Habitat use by western pond turtles in the Trinity River, California

Article Abstract:

A new study examines the habitat use by western pond turtles in northwestern California's Trinity River. The aim of the study is to examine the use of dammed and undammed river, and the link between habitat use and damming. It is shown that turtles prefer deep, slow-flowing pools with basking sites and underwater cover, at both dammed an undammed sites, although damming removes the slow-flowing water areas favoured by western pond turtles. Habitat enhancement efforts in such areas should include restoration of natural structures such as basking logs and natural flow regimes should be maintained.

Observations, Habitats, Turtles, Trinity River

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Effects of habitat manipulations on Texas horned lizards and their prey

Article Abstract:

The endangered Texas horned lizard occurs in areas of shortgrass prairies, but the management of such areas to benefit livestock may be hostile to its survival. A survey assesses five land management practices, burning, CRP, disking, grazing, and a combination of burning and disking, to determine their effect on the abundance of Texas horned lizards. The study shows that the lizard preferred areas that had been recently burned, while under-using the CRP and burned and disked plots. It is concluded that burning and grazing are the most beneficial practices.

Behavior, Environmental aspects, Texas, Habitat modification, Range management, Horned toads, Horned lizards

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Chromium and selenium in invertebrate prey of lesser scaup

Article Abstract:

The bioaccumulation of chromium and selenium at dangerous levels in the invertebrate prey of lesser as well as greater scaup in north America has led to the decline of the scaup populations.

Analysis, Physiological aspects, Invertebrates, Bioaccumulation, Clinical report

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