The Effect Of Environmental Factors On Reproductive Behavior And Breeding Of The Seahorse, Hippocampus Kuda Bleeker

The seahorse,Hippocampus kuda Bleeker,belongs to the fish outline, syngnathiformes item,hippocampus.It is an important drug-induced economic ornamental fish in china. In this paper,thecircadian rhythm and reproductive behavior of the seahorse are observed and analyzed, and itstudied the effect of the mating and parturition behaviors of the seahorse and the growth of thelarval seahorse influenced by environmental factors such as salinity, temperature, water depth, lightintensity. The results follow as:1.In the breeding period,the seahorse are diurnally active, whereas during the night becomeimmobile; the way of daily greetings was used by the male seahorse to make the female pregnantand strengthen monogamous relationship; it’s a unique marriage, mating, parturition and hatchingbehavior that the male capsule incubation offspring; the seahorse are fond of fixing on the verticalplaced natural plant.2.The mating and parturition behaviors of the seahorse depend on external environmentfactors quite large. External environment changes easily influenced its behaviors and can undergomutation; Female H.kuda give preference to big norms spouse, while the male choice that similarwith their own specifications; Water depth must be made within60cm above, otherwise can’tcomplete mating behavior; Water temperature is in25to30℃, salinity in20to25to guarantee ahigh mating success; Direct sunlight, dark environment and no side will influence the natality ofthe larval seahorse; The seahorse need quiet environment when breeding, because that noise cangreatly reduce the mating rate and the offspring output, seriously can cause all abortion and parentsdied.3.The results showed that the optimum temperature for growth of the larval H.kuda was28℃,and its growth rate was no obvious differences during the water temperature in24℃-32℃;The larval H.kuda preferred the high and stable salinity of the environment (above20). To60days,the seahorse which were bred in the30ppt salinity grew faster and the survival rate was highest. Low light intensity was more suitable for the growth and the most suitable stocking density was250ind./m~3.There was less research on breeding behavior of the seahorse and the behavior changebrought by environment change, which was against the expansion the artificial breeding production.This research was combined with environmental factors and the behavior characteristic of theseahorse breeding phase, discussed the relationship between the environment factors and thesurvival rate of offspring, accumulated a new experience and provided the theoretical basis for theseahore seedling cultivation technology. The result was applied in production, provided technicalguarantee for the steady production of the seedlings fish, and it had important significance to ouraquatic breeding healthy development.