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30.130  Articles
1 of 3.013 pages  |  10  records  |  more records»
Primary burrowing crayfish life history and ecology is largely due to their cryptic habitat preferences. Cambarus monongalensis, arguably the most charismatic of all crayfishes, lacks basic life history and habitat data because of the aforementioned obsta... see more

All crayfish worldwide can be defined as one of the three types of burrower. However, burrowing types were created using behavior and habitat. Geometric morphometrics via landmarks can be used to determine similarities and differences between burrowing ty... see more

Arnold Ortmann, one of the nations first crayfish biologists, conducted crayfish surveys in the late 1800’s and early 1900’s across western Pennsylvania. Unique for the time was Ortmann’s inclusion of primary burrowing crayfishes. Primary burrowing crayfi... see more

Because crayfishes are the 4th most imperiled group of aquatic or terrestrial organisms in North America, agency efforts to assess the status of the fauna have increased in recent decades. Historically these assessments have focused on stream-dwelling spe... see more

Astacological efforts in Pennsylvania have increased over the past decade. In particular, the distribution and conservation standing of WPA burrowing crayfish represents the greatest void in knowledge regarding the states crayfish fauna. To rectify this s... see more

Crayfish respond rapidly to environmental changes, this responsiveness to environmental changes makes them good detectors for degradation in the environment. Contaminants in the environment may influence crayfish by making them absent in what would be pri... see more

Crayfishes are keystone species and ecosystem engineers in freshwater systems and are considered the third most imperiled taxa on the planet. In 1906, Arnold Ortmann published one of the most complete historic crayfish surveys ever conducted, which has al... see more

Due to their fossorial tendencies, primary burrowing crayfish are the most difficult behavioral group of crayfish to study in-situ. In this study we elucidated both natural and life history aspects and intraspecific behaviors from a collection of 111 indi... see more

Plant nematode surveys were made at 55 farm sites in six Districts of Belize, Central America, during February, November and December, 1993. Crops sampled included banana and plantain, cassava, citrus, coconut, cocoyam, corn, ginger, papaya, passion fruit... see more

1 of 3.013 pages  |  10  records  |  more records»