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The fish of schizothoracine Tibet and its neighboring areas endemic fish of valuable fish resources. Distributed in the tip of the Yarlung Zangbo River basin naked carp in Lhasa Schizopygopsis fish, the Lhasa Schizothorax fish, four kinds of fish and other schizothoracine fish Dimetrodon Schizothorax the sharp decline in recent years because of environmental degradation and overfishing, the amount of resources. Of this study pointed Gymnocypris, Lhasa Schizopygopsis the fish, Lhasa Schizothorax, Dimetrodon Schizothorax the fish early development of the biological characteristics and adaptability to the environment, to provide a scientific basis for the Brahmaputra unique fish germplasm resources protection and rational utilization of . The main findings are as follows: 1. The tip Gymnocypris mature eggs were round, yellow, Shen, egg diameter 2.57 ± 0.07 mm, the fertilized egg absorbent full expansion egg diameter 3.22 ± 0.07mm. Water temperature 9.5-11.8 ℃ the pointed Gymnocypris embryo development lasted 265 h, will be divided into the embryonic development of the external morphology and typical characteristics of a fertilized egg, the blastoderm formation, cleavage, blastula, gastrula, neurula, organ differentiation and to hatch eight stages, a total of 32 periods. The film larval total length of 10.27 ± 0.15 mm, the film 20 days after the yolk is exhausted, the total length of 15.22 ± 0.27 mm. Film after 80 days, the fry total length of 23.65 ± 0.59mm, hip scales appear, the fins are all fry lateral line formation and clear, close to the body color and body type adult fish. 2 the Lhasa Schizopygopsis fish mature eggs are round, golden yellow, Shen, egg diameter 2.50 ± 0.08 mm, egg diameter 3.54 ± 0.07 mm after the full expansion of the fertilized egg absorbent. Water temperature 9.5-11.1 ℃, the Lhasa Schizopygopsis fish embryonic development lasted 295 h, will be divided into the embryonic development of the external morphology and typical characteristics of a fertilized egg, the blastoderm formation, cleavage, blastula, gastrula, neurula organ differentiation and 8 hatching stage, a total of 31 periods. The film larvae Length 10.86 ± 0.33 mm, heart rate 80-89/min 18 days after the film yolk depleted, the total length of 15.58 ± 0.44 mm. The film after 77 days, the fry total length of 26.34 ± 0.69 mm, the whole is khaki side view silver white, white belly, fins are; buttocks scales appear all fry lateral line formation and clear, close to the body color and body type into fish. Lhasa Schizothorax mature eggs were round, brown, Shen, egg diameter 2.95 ± 0.09 mm, egg diameter 4.03 ± 0.06 mm in the fertilized egg absorbent full expansion. Water temperature 10.0 ~ 12.0 ℃ of fish embryos Lhasa Schizothorax development lasted 264 h divided into fertilized eggs according to the external morphology and typical characteristics of embryonic development, blastoderm formation, cleavage, blastula, gastrula, neurula, organ differentiation and hatching eight stages, a total of 33 periods. The film larvae full-length 10.67 ± 0.17 mm, eye capsule melanin sparse evenly covered with eye capsule, the film 23 days after the yolk is exhausted, the total length of 15.27 ± 0.26 mm clear intestinal containing food group. The film after 69 days, the fry a total length of 20.92 ± 0.44 mm, and the fins have all caudal fin forked fry side line formation and clear, close to the body color and body type adult fish. Dimetrodon Schizothorax the fish mature eggs are round, yellow, Shen, egg diameter 2.40 ± 0.12 mm, the fertilized egg absorbent fully inflated egg diameter 3.67 ± 0.10 mm. Temperature 12.1-13.8 ℃ Dimetrodon Schizothorax fish embryonic development lasted 190 h, according to the embryonic development of the external morphology and typical characteristics will be divided into a fertilized egg, the blastoderm formation, cleavage, blastula, gastrula, neurula organ differentiation and 8 hatching stage, a total of 32 periods. The film larvae total length of 9.84 ± 0.28 mm, multi resting on the bottom, rely tail swing is lying or standing around. Out 22 days after the yolk membrane depleted dorsal anterior and inferior abdominal pelvic fins appear, was less than half rounded, total length of 14.15 ± 0.23 mm. Out 65 days after the film, fry total length of 17.65 ± 0.45mm, fry body slender, big head, rounded kiss, the fins are caudal fin forked fry side line all formed clear, close to the body color and body type adult fish. Sharp Gymnocypris the Lhasa Schizopygopsis fish, the Lhasa Schizothorax, Dimetrodon Schizothorax the fish early developmental uniqueness of reflecting the the plateau environment adaptive evolution.
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