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Pacifastacus fortis (known as the Shasta crayfish or placid crayfish) is an endangered crayfish species endemic to Shasta County, California, where it is found and first described in 1914, only in isolated spots along the Pit River and Fall River Mills. [4] It is estimated that there are a total of roughly 4000 of the species still alive today. [5]
Research shows that crayfish do not die immediately when boiled alive, and respond to pain in a similar way to mammals. Then the stress hormone cortisol is released and this leads to the formation of lactic acid in the muscles, which makes the meat taste sour.
Most male fish have two testes of similar size. In the case of sharks, the testes on the right side is usually larger [citation needed].The primitive jawless fish have only a single testis, located in the midline of the body, although even this forms from the fusion of paired structures in the embryo.
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Crayfish have peripheral nerve fibres [44] which are responsive to noxious stimuli. [ 42 ] Neurons functionally specialized for nociception have been documented in other invertebrates including the leech Hirudo medicinalis , the nematode Caenorhabditis elegans and the molluscs Aplysia californica and Cepaea nemoralis .
Here's how the "Where the Crawdads Sing" movie (now on Netflix) differs from Delia Owens' book. 'Where the Crawdads Sing' on Netflix: The biggest changes between the book and movie Skip to main ...
Since its release, the “Crawdads” book has captivated readers around the world, spending more than 160 weeks on the New York Times’ best sellers list to-date. Now, moviegoers will flock to ...
Procambarus zonangulus, the white river crawfish, [4] white river crayfish [5] or southern white river crayfish, [1] [6] is a species of freshwater crayfish. It is a distinct but closely related species from Procambarus acutus , which is also known as white river crayfish and has a wider range.