The Catch Distribution of Ommastrephes batramii in Squid Jigging Fishery and the Relationship between Fishing Ground and SST in the North Pacific Ocean in 2004

Neon flying squid Ommastrephes batramii is widely distributed in the North Pacific Ocean, which has become the main fishing species for Chinese squid jigging fleets since 1993. Many authors have made the studies on the fields of fishing ground and its environment conditions. However, the squid catch per fishing vessel attained the highest level of about 550 t in 2004. In this paper, the catch and its distribution in 2004 would be compared with the previous year. Based on the catch data from Chinese squid jigging vessels and sea surface temperature with the format of 1 °latitude by 1 °longitude from May to November in 2004, the distribution maps were drawn by Marine explorer 4.0. The results show that the production in the east waters to 160°E was low during May and July. During October and November, the production in the waters from 150°E to 160°E was relatively higher, which occupied 62.5 percent of the total catch. During November, the production in the west waters to 150°E was also low. The highest CPUE area located in the west waters to 150°E, the next was the area from 150°E to 160°E and the lowest CPUE area located in the east waters to 160°E. The SST in the fishing ground seems to change seasonally. The suitable SST for each month is as follows： 12-14 ℃ in May, 15 ℃ - 16 ℃ in June, 14 ℃ - 16 ℃ in July, 18 ℃ - 19 ℃ in August, 16 ℃ -17 ℃ in September, 15 ℃- 16 ℃ in October and 12 ℃ - 13 ℃ in November. The result of K-S test shows that the above monthly suitable SST is considered as the indicator of looking for the main fishing ground.

有毒污水泛滥 受罚三万元

我市郊区窑坡渡乡，有一座小型水库，名叫蚕桑水库，水面为80余亩，水库有深有浅，年平均水深在三米以上，集雨量面积较大，水质肥爽，鱼类饵料来源丰富，年产鱼47000多斤，亩平产鲜鱼585斤。同时，库区无杂物，易于捕捞，是我市郊区产鱼量最高的唯一水库。

Studies on the Technology for Mass Production of Abalone Breeding

Based on the traditional way of abalone breeding,the technological process of industrial abalone breeding suitable for the coastal areas of southern China has been developed.The process is simple and easy to handle,and results in a high yield of young abalones after being applied.

Aqua Forestry and Duck Integration in Tamil Nadu, India

A study was taken up on integration of ducks in private and community fish ponds in Tami Nadu. A total of 50 ha of land under private holding and community water bodies each were selected to implement this model. Ducks were integrated based on the water spread area. Fodder, fruit, nuts, fuel, timber trees and vegetables were grown on pond bunds. Control units of fish ponds of farmers holding without integration of ducks also were taken up. A control unit also was established in the university farm land with and without integration of ducks. In private water bodies coconut trees and banana fetched additional revenue. During the first year the average fish production from the private land model was 1,552 kg and 1,731 kg for the first and second year respectively per Hectare. In community ponds the yields were 1,610 and 1,337 kg for the first and second year respectively. In field control units there was no increase in fish yield over the years. In private water bodies the beneficiaries got egg yield of 148 and 90 eggs and community water bodies 144 and 127 eggs per bird were obtained during first and second year resoectivelv.

Rice ＋ Fish Farming in Homesteads： Sustainable Natural-Resource Management for Subsistence in Arunachal Pradesh, India

Understanding the attributes of traditional, location-specific land-use systems will provide insights for improvement of such systems and design of new ones for wider applicability. The integrated rice ＋ fish system developed by the Apatani tribe of Ziro valley, Arunachal Pradesh, Northeastern India is such a unique system. Faced with shortages of their staple food items （rice and fish）, these subsistence farmers developed this ingenious system--in preference to the wide-spread shifting cultivation in the region--by capitalizing on the good water supply （from rainfall supplemented by natural flow from hills surrounding the valley）. Two rice crops are grown annually and fish is reared in paddy fields during the main rainy season. Crop residues and animal wastes are the sources of nutrients to crops, chemical fertilizers and insecticides are not used. Over the years, rice yield has been stable at about 3,700 kg.ha-1.year-1. Recently, UNESCO has tentatively added the valley as a ＂world heritage site＂ recognizing its ＂extremely high productivity＂ and ＂unique＂ ecological preservation. The resilience and the sustainability of the system could be attributed to efficient nutrient cycling and nutrient input through water seeping in from surrounding hills, which have not been, but deserve to be, quantified.

Breeding and mass scale rearing of clownfish Amphiprion percula: feeding and rearing in brackishwater

Breeding and mass scale larval rearing of clownfish Amphiprion percula is very limited in brackishwater. We designed an indoor program of A. percula culture in brackishwater with a salinity of 24±1, during which the impacts of feed type, water temperature, and light intensity, on the efficiency of its reproduction, were revealed. The fish were accommodated along with sea anemones in fibre glass tanks to determine the influence of brooder diet on breeding efficiency. Higher reproductive efficiency [number of eggs laid （276±22.3 eggs）] was observed when fish were fed live Acetes sp. rather than clam （204±16.4 eggs）, trash fish （155±12 eggs） and formulated feed （110±10 eggs）. The spawning rate was increased during September and October （water temperature, 28.74±0.55℃） on average of 2.4 spawning per month; and low spawning rate was in January （water temperature, 24.55±0.45℃） on average of I spawning per month. Among three light intensities （100, 500, and 900 1x） set to evaluate larval survival rate, larvae showed the highest survival rate （65.5%） at 900 lx. The breeding method specifically in brackishwater developed in the present study is a new approach, will help the people from the regions of estuary and backwater to enhance their livelihood and it will lead to reduce the exploitation from the wild habitat.

Purification and characterization of novel antioxidant peptides of different molecular weights from mackerel Pneumatophorus japonicus protein hydrolysate

Mackerel （Pneumatophorus japonicus） proteins were hydrolyzed by five proteases： trypsin, papain, neutrase, acid protease, and flavourzyme. The hydrolysate treated by neutrase exhibited the highest antioxidant activity. Response surface methodology （RSM） was employed to optimize the hydrolysis conditions in an effort to obtain a mackerel protein hydrolysate （MPH） with the highest DPPH radical scavenging activity. The MPH was fractioned using a series of ultrafiltration membranes and five fractions, namely, MPH-I （〉10 kDa）, MPH-II （10-2.5 kDa）, MPH-III （1-2.5 kDa）, MPH-IV （0.4-1 kDa）, and MPH-V （below 0.4 kDa）, were obtained. DPPH radical scavenging activity, reducing power, hydroxyl radical scavenging activity, and the lipid peroxidation inhibition capability of these fractions were evaluated. The fractions in molecular weights 〈2.5 kDa （MPH-III, MPH-IV, and MPH-V）, which occupied 93.4% of the total fractions, showed the strongest antioxidant activity; and the antioxidant activities of the three fractions are similar to each other. Using SP Sephadex C-25 and Sephadex G-25 columns, eight fractions were obtained from the MPH （〈2.5 kDa）. The isolated peptide I （1 664 kDa） displayed the highest DPPH radical scavenging activity. Therefore, MPH is a potential source of antioxidant peptides.

全脂玉米胚芽在鲶鱼饲料的应用

本研究旨在观察全脂玉米胚芽对鲶鱼生长性能的影响及其机理探讨选用5.2-5.5 g鲶种,按试验要求随机分为3个处理组组,即试验组1、试验组2和试验组3,每个处理2个重复,试验组1增加1个重复,饲养试验时间为85 d。结果表明,全脂玉米胚芽有效提高了鲶鱼的增重,减少饲料浪费,显著降低饵料系数(P<0.05),节省了费用,与同期试验组2和试验组3鲶鱼料饲喂效果相比较,体色、成活率等方面也无显著影响. 结果表明,饲料中添加5%,,对鲶鱼的生长有促进作用,且无不良影响。