| Oratosqilla oratoria belongs to Arthropoda, Crstacea, a subclass of soft, Stomadistaloda, Sqμillidae, O. oratoria. China is widely distributed in the sea area. The current study about O. oratoria focuses on biology, histology, ecology, culture, breeding biochemical, molecular genetic research. The study of Stomadistaloda behavior mainly concentrated in the attack behavior and reproductive behavior. As important offshore economic species, O. oratoria usually go through before listing foster a long time, while the mortality rate is high. Based on the indoor simulated conditions, the important behavioral characteristics of O. oratoria were observed and studied. In order to understand O. oratoria behavior characteristics, improve the temporarily environment and reduce mortality to provide technical reference.In addition, as a potential breeding object, behavior characteristics of O. oratoria in artificial breeding is also noteworthy. It can provide a theoretical reference for the future of artificial breeding.This paper study from 5 aspects of O. oratoria behavior:1. Selectivity of artificial burrows. Mainly studied in the laboratory simulation environment, the influence of the artificial burrows for O. oratoria survival,and the difference of O. oratoria on different diameter artificial burrows to rate. The results show that under the same density of O. oratoria case, With artificial burrows the shrimp survival rate was 92.2±5.02%, Without artificial burrows the shrimp survival rate was 73.3±5.96%;The selection rate of artificial cave with the diameter of 10 cm is the highest(the highest rate of sports is 40±5.77%, the average rate of sports 6.44±0.97%). O. oratoria is more adapt to the long, dark and wide artificial burrows.2.Movement behavior. Exercise behavior of O. oratoria is mainly swimming and turning. Swimming is mainly through frequent paddling pleopod, resulting in forward thrust; turning is mainly through the abdomen to bend sharply, change the direction of the head. We mainly tested O. oratoria in different periods of daily swimming speed. In(25±1) ℃ and 35 ‰ salinity conditions, O. oratoria protozea and postlarva daily swimming speed have little difference for 2.45±0.84cm/s and 2.18±1.29cm/s. Adult shrimp daily swimming speed is 4.63±1.39cm/s. Observed that the O. oratoria protozea more active than postlarva. While the least active is adult shrimp.3.Territorial behavior. Effects of different size, sex and under different breeding density, the O. oratoria territorial behavior, including threats, fighting behavior, and record fighting time and frequency. When two shrimp met for the first time, they will show the fighting behavior or escape behavior.Fighting behavior can be divided into 5 levels, respectively, respectively, to escape(-1), encounter(0), approaching(1), intimidation(2), attack(3). Fighting movements are mainly used in second maxilliped, a strong knock. We found that O. oratoria in the fight, the winner will become the dominant class, the loser become a subordinate rank. When the two shrimp met again, the winner of the more aggressive, more likely to win in the fight, the possibility of failure, the more likely to fail.4.Grooming behavior The morphological structure of O. oratoria appendage setae were observed, In the indoor environment to observe and record the types of grooming behaviors, body regions groomed, grooming frequency and grooming time etc. The grooming behavior of O. oratoria, appendages on the bristle play a significant role. Because different parts of bristles, also have the difference. O. oratoria setae of the whole structure is relatively simple, which is divided into simple shaped, serrated, spiral shaped, flat ribbon, comb and pinnate. O. oratoria use their maxillipeds to clean,including eyes, antenna, maxillipeds, pereopod, pleopods and telson. Grooming method can be divided into brush, scraping, hook. O. oratoria in indoor artificial breeding conditions, a day about 57.00 + 1.00% of the time in grooming behavior, mainly concentrated in the 12:00 to the 8:00.The grooming behavior mainly happens in pereiopods, gills, accounts for about 35.10% of the total grooming time.For the eyes and two pairs of antennae,the cleaning is less, respectively 7.58% and 7.98%. Main grooming appendages are first, third, fourth, fifth maxilliped.5.Activity rhythm Under the condition of artificial cultivation in the light of natural light, a shrimp has a significant diurnal variation. In terms of feeding, the peak of feeding is between 18:00-6:00, and 19:00-22:00 is a relative concentration of the main feeding time. The swimming behavior in the night between 6:00 to 23:00 the next day is more active. In the cleaning behavior, the peak of cleaning occurs between 23:00 to 7:00. |
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