| Based on the fishing data of the bottom-trawl in the Arafura Sea of Indonesia during Jan through Nov in 2013,This paper analyzed the catch inverse proportion,space distributing and alteration among the different months; combined the remote sensing data of sea surface temperature(SST) 、 sea surface salt(SSS) 、 exhibited the fishing ground and the environment characteristic of the Arafura sea,analyzed the relationship between the fishing ground and the environment factors by the software of GIS;use the Statistic software R,studied the relationship between the fishing ground and environment characteristic based on the generalized additive model(GAM), confirm the environment factors which distinctly effected the catch per unit effort(CPUE)of different catch,analyzed the results of models.The conclusion as follows:(1) During Jan to Nov, Trichiurus lepturus in Feb, Mar and Aug to Nov production is relatively high, with an average share of 51.5%, in September the largest proportion, 66 percent, the lowest proportion in March, was 39.1%; Nibea Coibor in Feb, Mar and Aug to Nov production is relatively high, with an average share of 10%, in March the largest proportion, 21.6%, the lowest proportion in July, 6.5%; Apolectus niger in Feb, Mar and Aug to Nov production is relatively high, with an average the proportion of 9.2%, in Oct the largest proportion, 18.6%, the lowest proportion in March, 3.2%; Rhinoprenes pentanemus Munro in Mar and Aug to Nov production is relatively high, with an average share of 9.2%, in Oct the largest proportion, 22 percent, January lowest proportion, 1.1%; Anguillifor in Feb, Apr, Sep and Nov production is relatively high, with an average share of 3.2%, in November the largest proportion, 14.9%, in May the lowest proportion of 1%.(2) From the point of view of latitude, distribution of catch of Trichiurus lepturus along the latitudinal direction is consistent with the changing trend CPUE, and the largest CPUE located in 7.5?S, respectively 974.5kg / h, 208.04t; distribution of catch and CPUE of Nibea Coibor Trends inconsistent, the largest CPUE located in 7?S, for 165.47 kg / h; distribution of catch and CPUE of Apolectus niger trends basically the same, but the largest catch and the largest CPUE located indifferent lat, the largest catch in the vicinity of 7.5?S, is 27.1t, the largest CPUE located in 7?S,is 239.01 kg / h; distribution of catch and CPUE of Rhinoprenes pentanemus Munro trends basically the same, but the largest catch and the largest CPUE located indifferent lat, the largest catch located near 7.5?S, is 31.56 t, the largest CPUE located in 8?S,is 184.58kg/h; distribution of the largest catch and the largest CPUE of Anguillifor located in the same lat 8.5?S, are 14.74 t, 126.44kg/h.(3) From the point of view of longitude, distribution of catch of Trichiurus lepturus along the longitude is different from CPUE, longitude is higher and the catch is lower, with the increase of longitude, CPUE first increased and then reduced, the largest CPUE along the latitude is 137.5?E, for 2260.65 kg / h; distribution of catch and CPUE of Nibea Coibor are same, located in 137.5?E the largest catch is 24.44 t, the largest CPUE is 298.17 kg / h; the largest CPUE of Apolectus niger located in 37.5?E, is 308.59 kg / h; CPUE of Rhinoprenes pentanemus Munro located near 137.5?E, is 247.01 kg / h; the largest CPUE of Anguillifor located near 137?E, is 50.14 kg / h.(4)The range of CPUE of Trichiurus lepturus throughout fishing areas is 117.67 ~ 2260.65 kg / h, the average is 738.32 kg / h, the larger CPUE located in 136.5 ~ 137.5?E, 7 ~ 8.5?S; CPUE of Nibea Coibor ranges 71.19 ~ 298.17 kg / h, the average is 132.3kg / h; In general, the larger CPUE of Nibea Coibor located in 136.5 ~ 138?E, 7 ~ 8.5?S; CPUE of Apolectus niger ranges 90.35 ~ 308.59 kg / h, which average of CPUE is 151.45 kg / h, the larger CPUE concentrated in 136.5 ~ 138.5?E, 7 ~ 8?S; The range of CPUE of Rhinoprenes pentanemus Munro is 9.6 ~ 247.01 kg / h, its CPUE average is 118.98 kg / h, which the larger CPUE concentrated in 137 ~ 138.5?E, 7 ~ 8?S; The range of CPUE of Anguillifor is 2.55 ~ 50.14 kg / h, which average of CPUE is 22.93 kg / h, its larger CPUE more concentrated in 136.5 ~ 137.5?E, 7.5 ~ 8.5?S.(5) During Jan to Nov, the range of optimum SST about Trichiurus lepturus are as follows: Jan :29 ~ 30.5 ℃; Feb :29.5 ~ 30 ℃; Mar, Apr, May, Jul, Aug, Sep, Oct and Nov a: 30 ~ 30.5 ℃; Jun :28 ~ 28.5 ℃.The range of optimum SST about Nibea Coibor are as follows: Jan,Feb are 29.5 ~ 30 ℃; Mar :25.5 ~ 26 ℃; Apr :26 ~ 26.5 ℃; May and Nov :28 ~ 28.5 ℃; Jun, Jul and Sep :28.5 ~ 29 ℃; Aug :30 ~ 30.5 ℃; Oct :27 ~ 27.5 ℃.The range of optimum SST about Apolectus niger are as follows: Jan and Aug : 30 ~ 30.5 ℃; Feb and Mar : 29.5 ~ 30 ℃; Apr : 26 ~ 26.5 ℃; May and Oct : 27 ~ 27.5 ℃; Jun : 28 ~ 28.5 ℃; Jul : 29 ~ 29.5 ℃; Sep and Nov : 28.5 ~ 29 ℃.The range of optimum SST about Rhinoprenes pentanemus Munro are as follows: Jan and Aug: 30 ~ 30.5 ℃; Feb : 29.5 ~ 30 ℃; Mar : 25 ~ 25.5 ℃; Apr :26 ~ 26.5 ℃; May: 27 ~ 27.5 ℃; Jun : 28 ~ 28.5 ℃; Jul :28.5 ~ 29.5 ℃; Sep and Nov : 28.5 ~ 29 ℃; Oct :27.5 ~ 28 ℃.The range of optimum SST about Anguillifor are as follows: Jan and Aug: 30 ~ 30.5 ℃; Feb :29 ~ 29.5 ℃; Mar,May and Oct : 27 ~ 27.5 ℃; Apr : 26 ~ 26.5 ℃; Jun : 28 ~ 29 ℃; Jul,Sep and Nov :28.5 ~ 29 ℃.(6) During Jan to Nov, the range of operating depth is 14.5 ~ 54.4m. The range of optimum operating depth about Trichiurus lepturus are as follows: Jan: 50 ~ 55m; Feb: 40 ~ 45m; Mar, Apr, Oct and Nov 15 ~ 20m; May : 20 ~ 25m; Jun: 45 ~ 50m; Jul, Aug, Sep :35 ~ 40 m.The range of optimum operating depth about Nibea Coibor are as follows: Jan : 50 ~ 55m; Feb, Jun and Sep :30 ~ 35m; Mar : 25 ~ 30m; Apr and May: 40 ~ 45m; Jul and Aug :35 ~ 40m; Oct and Nov 15 ~ 20 m.The range of optimum operating depth about Nibea Coibor are as follows: Jan : 50 ~ 55m; Feb,Mar and May :40 ~ 45m; Apr :15 ~ 20m; Jun and Sep : 30 ~ 35m; Jul and Aug :35 ~ 40m; Oct and Nov :15 ~ 20 m.The range of optimum operating depth about Rhinoprenes pentanemus Munro are as follows: Jan : 45 ~ 50m; Feb and May : 40 ~ 45m; Mar: 25 ~ 30m; Apr, Jun,Oct and Nov : 15 ~ 20m; Jul and Aug : 35 ~ 40m; Sep : 30 ~ 35 m.The range of optimum operating depth about Anguillifor are as follows: Jan and Jun : 45 ~ 50m; Feb : 30 ~ 35m; Mar : 25 ~ 30m; Apr, Jul, Aug and Sep : 35 ~ 40m; May : 40 ~ 45m; Oct : 20 ~ 25m; Nov :15 ~ 20 m.(7) The paper chose the significance environment factors and got the degree of different factors affected among the different CPUE. According to the degree, the factors to CPUETL are: Latitude> SST> operating depth; the factors to CPUENC are: Latitude> SST> operating depth; the factors to CPUEAN are: Latitude> Longitude > Operating depth> SST; the factors to CPUERM are: operating depth> SST> longitude; the factors to CPUEA are: latitude> longitude> Job depth> SST. |
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