We bought 5 rabbits (1 ♂,4 ♀)and fed them in order to understand their physiology and growth characteristics in the breeding process.The results showed that:Meat rabbit of 6-7 month old can mate and reproduce.The average of the pregnancy was 3 1 .6 d,the longest was 3 3 d and the shortest was 30 d;the number of births most was 6,the least was 1.Meat rabbit average weight of 2 d was 43. 99g.Meat rabbit average weight of 29 d was 463.33g,and the weight was 10 times the weight of the new-born.When the meat rabbit grow up to 60 days,the average weight of 1130 g,the weight of 60 days was 25 times the weight of the newborn and 2.5 times the weight of the 29 days.
随机抽取40尾斑节对虾、日本对虾和120尾凡纳对虾，测定含肉率并对三种对虾含肉率进行了比较，结果表明：斑节对虾含肉率最高，为58.65±5.2，其次为日本对虾，为58.59±6.84，最后为凡纳对虾，为57.86±4.37。分别对三种对虾含肉率之间的差异进行了T检验，结果表明：凡纳对虾与斑节对虾含肉率之间差异显著（P=0.005），其余差异不显著。
The dorsal ossicles of fresh Apostichopus japonicus,dried product and frozen product were observed with scanning electron microscope(SEM).The results showed that the ossicles of the fresh and the dried were identical,but were different with the frozen.The 16S mitochondrial rRNA sequences from them were amplified and sequenced,and phylogenetic relationships among them were presented.Consequently,the sequence of the fresh was identical to the dried.However,the homology between the dried and the frozen was 81.5%.Both phylogenic trees supported that the relationship between the fresh and the dried was close,and the frozen was not closely related with them.Both morphological and molecular methods proved that the dried product was real Apostichopus japonicus,but the frozen product was a fake.
Sepia pharaonis is one of the most important economic cephalopods in South China Sea. The eggs of S pharaonis were cultured observed continuously in the laboratory. The length of egg is （30.7±2.4）mm in long diameter and （13.4±1.3）mm in short diameter. The different periods of eggs were got with photomicrography and their embryonic developments were compartmentalized into 30 periods, such as cleavage, blastocyst, gastrulation, the beginning of filling stage of external organs, white eyes, red eyes, black eyes, and so on. The characteristics of each period were described and the changes of the mainly organs were discussed, such as eyes, funnel organ. During the growth period, the length of embryo proper was increasing by time, while the diameter of yolk was decreasing. To be more specific, both the length of embryo proper and the ratio of embryo proper and yolk diameter increased between the period of day 7 to day 20, from 2.5mm to 11.3mm and 0.28 to 2.51, while the diameter of yolk decreased from 8.7mm to 4.5mm in the same period. The peak hatching time was 20--24d and the hatching rate was 85.3% under the condition of （23±0.5）℃, salinity 28, pH 7.41. The mean length of mantle and mean weight of hatchling larval were （12.5±0.3）mm and （0.18±0.02）g, respectively.
拟目乌贼在繁殖期间的行为较为复杂,包括求偶、雄性争斗、交配、雄性陪护、产卵等行为。拟目乌贼在生殖策略上并非"一夫一妻"制,交配时,雄性用第1、2对腕固定雌性的头部,然后用茎化腕将精荚输送至雌性纳精囊内。雌性受精后不久便产卵,拟目乌贼雌性轮流在产卵区产卵。卵白色,半透明,卵群葡萄状,分枝,刚产出的卵短径约1.2cm,长径约2.4cm,拟目乌贼平均产卵量为354枚。
