Abstract
Studies focusing the biology of annual fish are still scarce, and in the case of threatened species, research, as well as the adoption of protective measures for these populations, are needed. We present herein the first record of Hypsolebias antenori (Cyprinodontiformes: Cynolebiidae) in temporary pools of Lajedo de Soledade, located in a semiarid region, in Northeastern Brazil. Five individuals (two males and three females) were captured in three temporary pools in May 2017. For the capture, a sieve (50 x 50 cm) with a 4 mm of mesh size was used. The males showed a total length ranging from 3.5 to 4.7 cm (average: 4.1 cm) and body mass amplitude between 0.38 to 0.94 g (average: 0.66 g). The females had a total length from 3.5 to 3.9 cm (average: 3.67 cm) and body mass amplitude of 0.55 to 0.70 g (average: 0.64). Considering that the collection area is one of the most important archaeological sites in Brazil, this endemic species of Caatinga demonstrates the importance of conservation of the environment and serves to support the preservation of the present area that is not recognized and registered as cultural and environmental patrimony.Keywords: Karst, Jandaira Formation, Caatinga, temporary pools, Cynolebiidae, Hypsolebias antenori.
Highlights
The Caatinga biome is exclusive to Brazil, covering approximately 800,000 km2 of the Northeastern region (Ab’Saber, 2005) and is characterized by short periods and infrequent rains, interspersed with long periods of drought, high temperatures and high rate of evaporation (Chellappa et al, 2006)
Cynolebiidae Hoedeman, 1961 (Cyprinodontiformes) are found in both Africa and South America occupying temporary ponds that dried seasonally and are characterized by a relatively short adult life (Berois et al, 2014). Such fishes can complete their life cycles in temporary aquatic habitats by having a few adaptations to deal with the limitations of ephemeral habitats (Schalk et al, 2014)
Specimens of Cynolebiidae lay their eggs on the substrate, which remain in diapause during the dry seasons, and hatch in the rainy season, starting a new life cycle (Nascimento et al, 2014)
Summary
The Caatinga biome is exclusive to Brazil, covering approximately 800,000 km of the Northeastern region (Ab’Saber, 2005) and is characterized by short periods and infrequent rains, interspersed with long periods of drought, high temperatures and high rate of evaporation (Chellappa et al, 2006). Cynolebiidae Hoedeman, 1961 (Cyprinodontiformes) are found in both Africa and South America occupying temporary ponds that dried seasonally and are characterized by a relatively short adult life (Berois et al, 2014). Such fishes can complete their life cycles in temporary aquatic habitats by having a few adaptations to deal with the limitations of ephemeral habitats (Schalk et al, 2014). Specimens of Cynolebiidae lay their eggs on the substrate, which remain in diapause during the dry seasons, and hatch in the rainy season, starting a new life cycle (Nascimento et al, 2014)
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