Many people familiar with the fighting fishes of the genus Betta recognize members of the four well known wild type bubble-nesters in the B.splendens group: B. splendens , B. smaragdina , B. imbellis
, and B. stiktos , as distinct species by their distinguishing external features such as iridescence and colour of the operculum, body coloration, bars and patterns on the fins, and colour and iridescence of body scales . The species group used herein refers to an assemblage of species sharing a set of diagnostic characters . Regional distribution in thirty-three provinces of Thailand of the wild bubble-nesting bettas, classified according to the above general appearance and morphological
measurements, has been reported . An article on RAPD (randomly amplified polymorphic DNA) identification of a limited number of fish and their locations was also published. To obtain a more up-to-date and comprehensive understanding of the fish's natural distribution, we began a more extensive countrywide survey of these fishes in 2007 . We focused particularly on an iridescent
green/bluish-green betta fighting fish, B. sp. Mahachai. It has become the centre of our interest and also of ichthyologists and breeders because of its attractiveness and dwindling habitats. The habitats of this fish are generally the brackish waters west of Bangkok, where some parts have nipa palms (Nypa fruticans) whose bracts hold phytotelmata that may host the parental pair and their bubble nest. The type locality of the new species is near the Maha Chai subdistrict of Samut Sakhon province,
west of Bangkok. Because of human activities (e.g., industrial pollution and incursion by housing developments), this fish’s biotopes have diminished and become less habitable. In fact, it is a likely candidate for extinction, considering the small area to which the species is now restricted .
Many people familiar with the fighting fishes of the genus Betta recognize members of the four well known wild type bubble-nesters in the B.splendens group: B. splendens , B. smaragdina , B. imbellis, and B. stiktos , as distinct species by their distinguishing external features such as iridescence and colour of the operculum, body coloration, bars and patterns on the fins, and colour and iridescence of body scales . The species group used herein refers to an assemblage of species sharing a set of diagnostic characters . Regional distribution in thirty-three provinces of Thailand of the wild bubble-nesting bettas, classified according to the above general appearance and morphologicalmeasurements, has been reported . An article on RAPD (randomly amplified polymorphic DNA) identification of a limited number of fish and their locations was also published. To obtain a more up-to-date and comprehensive understanding of the fish's natural distribution, we began a more extensive countrywide survey of these fishes in 2007 . We focused particularly on an iridescentgreen/bluish-green betta fighting fish, B. sp. Mahachai. It has become the centre of our interest and also of ichthyologists and breeders because of its attractiveness and dwindling habitats. The habitats of this fish are generally the brackish waters west of Bangkok, where some parts have nipa palms (Nypa fruticans) whose bracts hold phytotelmata that may host the parental pair and their bubble nest. The type locality of the new species is near the Maha Chai subdistrict of Samut Sakhon province,west of Bangkok. Because of human activities (e.g., industrial pollution and incursion by housing developments), this fish’s biotopes have diminished and become less habitable. In fact, it is a likely candidate for extinction, considering the small area to which the species is now restricted .
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