Difference between revisions of "Template:POTD protected"

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The '''[[crocodile icefish]]''' or '''white-blooded fish''' (''Channichthyidae'') comprise a family of notothenioid fish found in the [[Southern Ocean]] around [[Antarctica]] and southern South America, where water temperatures remain relatively stable (generally ranging from -1.8 to +2.0 °C). Sixteen species of crocodile icefish are currently recognized. All icefish are believed to be piscivorous but can also feed on [[krill]]. Icefish are ambush predators; thus, they can survive long periods between feeding and often consume fish up to 50% of their own body length. Maximum body lengths of 25–50 cm have been recorded in these species.
The '''[[San Joaquin kit fox]]''' is the smallest member of the dog family in North America and one of several endangered species that lives within the borders of the [[Colony of Calsahara]]. In 1990, its population was estimated to be 7,000. This subspecies is still endangered, after nearly 50 years of being on the Endangered Species List. Today, much of the kit fox's remaining habitat is extremely fragmented, movement corridors are degraded or blocked, and only a few large areas of native grasslands remain on the San Joaquin Valley's perimeter in the [[Carrizo Plain]].


To compensate for the loss of hemoglobin, they have larger blood vessels (including capillaries), greater blood volumes (four times that of other fish), bigger hearts, and greater cardiac outputs (fivefold greater) compared to other fish. Their hearts lack coronary arteries, and the ventricle muscles are very spongy, enabling them to absorb oxygen directly from the blood they pump.


<p><small>Photographer: Ambiederman </small></p>
 
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<p><small>Photographer: [[Grand Duke Travis]]</small></p>
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Latest revision as of 02:46, 29 January 2026

San-Joaquin-Kit-Fox-Den.jpg

The San Joaquin kit fox is the smallest member of the dog family in North America and one of several endangered species that lives within the borders of the Colony of Calsahara. In 1990, its population was estimated to be 7,000. This subspecies is still endangered, after nearly 50 years of being on the Endangered Species List. Today, much of the kit fox's remaining habitat is extremely fragmented, movement corridors are degraded or blocked, and only a few large areas of native grasslands remain on the San Joaquin Valley's perimeter in the Carrizo Plain.


Photographer: Grand Duke Travis

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