Studies On Reproductive Behavioural Ecology Of Schizothorax Wangchiachii

Schizothorax wangchiachii belongs to Cypriniformes,Cyprinidae,Schizothoracinae,Schizothorax,Schizothorax,mainly distributed in Jinsha River, Dadu,Wu River and so on. Schizothoracine fish is a specialty of cold water fish in Asian highland areas, due to geographical barrier strong, rich in species diversity and habitat diversity schizothoracine fish, showing strong adaptability and evolution capability. In recent years, affected by hydroelectric development and overfishing and other unfavorable factors, the amount of natural resources has now Schizothorax wangchiachii failure trend. To reveal short hair Schizothorax reproductive characteristics and laws of nature, the analysis Schizothorax wangchiachii environmental adaptability, Conservation Measures Schizothorax wangchiachii of this study is to use the means and behavioral ecology, natural rivers and artificial water bodies in half, spawning behaviors Schizothorax wangchiachii selective breeding and reproductive investment and microhabitat observed. The main findings are as follows:1. May 2014 to March 2016 in Panzhihua City of Sichuan Province village of wins Schizothorax wangchiachii research data show: Schizothorax wangchiachii gonochoristic species shaped, breeding has obvious secondary sexual characteristics: male mature individuals snout with a large number of beads obvious star, the species is more rough; Female abdominal swelling, with a clear outline, gonopore prominent bright red,whole body is more smooth. Breeding season is December to next March, winter spawning type. Absolute fecundity of female is 5150 ~ 21180, spawning a batch type: oviposition behavior are uniformly dispersed in the breeding season, and spawning multiple times in a single day. Observed spawning points for the depth within 25 cm ~ 55 cm, In Torrent sand shoal.2. During 2014—2016, two breeding period, in Guosheng river Panzhihua City Sichuan Province, the method of Schizothorax wangchiachii spawning behavior research in situ fixed video observation was carry out. Schizothorax wangchiachii spawning behaviors observed include: exploring the environment, occupy and competion, field defense, mate selection, mating spawning, broodstock guard and other acts. Based on the observations made spawning behavior patterns Schizothorax wangchiachii and analyzes the male and female individuals in the spawning process differences: The male is spawning behaviors reflects the diversity and complexity, participated in almost all the acts during the breeding period; female participation of fish spawning behaviors is mainly reflected in the mate choice and mating behavior.3. By systematic observation of spawning behaviors, the time-distribution of different behaviors by broodstock was analysis and summed. The situation of Schizothorax wangchiachii energy input into the breeding was summed up: The results showed that female and male parental investment in breeding season are basically the same.Female reproductive investment is mainly reflected in the provision of the eggs and mating behavior; Male reproductive investment is mainly reflected in occupation and guarding the high quality of spawning grounds, the Babysitters behavior and spawning behavior.4. Based on "Position- Action- Environment"(PAE) system, functional behavior as the basis to build a Schizothorax wangchiachii PAE ethogram. Total of the Schizothorax wangchiachii, 10 kinds of postures, 33 kinds of action and 46 kinds of behavior were distinguished and recorded, and qualitative described the relationship between the frequency of different behaviors occurrence and the environment, age group and sex.5. When Schizothorax wangchiachii by spawning behavior, environmental data records bottom material: water temperature, air temperature, light intensity, dissolved oxygen, pH, conductivity, turbidity, flow velocity, water depth, sediment and other environmental data, analyzes and summarizes Schizothorax wangchiachii breeding changes in the scope of environmental data and spawning behavior occurred Key factors constructed Schizothorax wangchiachii spawning microhabitats best environmental data.