Cachorrito de charco azul

The Charco - Azul - pupfish ( Cyprinodon Veronicae ) is a freshwater fish of the genus Wüstenkärpflinge ( Cyprinodon ). It applies as extinct in nature.

Features

The males of the Charco Azul - Wüstenkärpflings reach a total length of 5.5 cm. The length of the short upper jaw contained 0.70 to 0.77 times the length of the anal fin base. The head length contained 2.7 to 2.9 times in standard length. The male has 6-7 indistinct dark stripes along the sides, which cover only the upper half of the body. The females have an irregular Eifleck to the dorsal fin. The black spots is crescent -shaped and smaller than a pupil. The eye diameter contained 1 to 1.2 times in the length of the anal-fin base. The postdorsale ( distance of the dorsal fin to the tail fins stalk) and postanale ( distance of the anal fin to the tail fins stick ) length contained 0.9 to 1.1 times in the length of the tail fin shaft. The anal fin is usually smaller than in related species and their length contained 3 to 3.9 times in head length. The fourth Ceratobranchiale contains no teeth. The dorsal fin is located behind the pectoral fin base. Males in wedding dress are purple blue.

Distribution and habitat

The former distribution area are aware of the now-dry fresh water springs at Ojo Charco Azul, also known as Barreno. They were part of the Bolson de Sandia Valley, in the Mexican state of Nuevo León, the 1600 m is located above sea level at the foot of the Sierra - Montelongo - Pedregoso Mountains. The region is semi-arid with cactus and other succulents. The shore is covered except on the east side of dense cedar. Originally, the water was crystal clear and had a temperature of 19 to 20 ° C. After the shrinkage of the sources, the water is brown and become the reason loamy or muddy. The aquatic vegetation comprised the genera Ceratophyllum, Potamogeton, Typha, Eleocharis, Lemna, Utricularia, Scirpus and Chara. The only other species of the genus Cambarellus a cancer was detected.

Status

1995 and 1996, the Bolson de Sandia Valley was hit by a record drought that led to the drying out of the Charco Azul Ojo sources. One male was observed in a very weakened state in the winter of 1995 just yet, probably not very long after that survived. Today, the kind exists predominantly in aquariums in the United States and Mexico. From Europe conversations from the London Zoo and the Tiergarten Schönbrunn are known.