Appendix 7

SELECTION OF MAJOR LANDING PLACES FOR L-II SURVEY AND SAMPLE VILLAGES
FOR L-III SURVEY AND BRACKISHWATER CULTURE SURVEY

Contents

1. General Procedure

2. Selection of Major Landing Places

3. Selection of Sample Villages for L-II Survey

4. Selection of Sample Villages for Brackishwater Culture Survey

5. Selection of Sample Villages by Means of PPS

Abbreviations Used

DGF     Directorate General of Fisheries
PFS     Provincial Fisheries Services
DFS     District Fisheries Services
MP      Fishery Extension Officer (Mantri Perikanan)
A area Sumatra, Java and Bali (census area)
B area Area other than A area (non-census area)

1. General Procedure

The selection of major landing place for L-II Survey and sample village for L-III Survey and brackishwater culture survey follow the three steps given below:

1. First step (first provisional selection by PFS)

   At first, PFS fill out necessary data on Form KL or KB based on the result of 1973 Agriculture Census for A area or the result of Marine Village Survey for B area. Then, based on standards as given in 2, 3 and 4 below, selection of major landing place or sample village is made by PFS.

2. Second step (second provisional selection in consultation with DFS)

   During the course of field trips of PFS official to every district in June and July 1975 for A area or in September and October 1975 for B area, the outcome of the first provisional selection is examined and adjusted in consultation with DFS from the viewpoint of its feasibility.

3. Third step (finalization in consultation with DGF)

   The adjusted results are finalized in consultation with DGF at the second national meeting on fishery statistics.

2. Selection of Major Landing Places

2.1 Standard Conditions

Major landing places selected from landing places which satisfy the following conditions:

1. More than 50 percent of the total fish landings of a respective district are landed through such landing places, regardless of whether a fish market exists or not.

2. Access to such landing places from the office of DFS or fishery extension officer does not involve much difficulty.

If such landing places do not exist in a district, it is not necessary to select the major landing centre. On the other hand, if a landing centre which handles more than 50 percent of fish landings exists but the access to such a landing centre is not easy, it is also not necessary to select any major landing centre. In such a district only L-III Survey is carried out.

2.2 Selection of Major Landing Place

At first, for all fish markets in a given district, the 1974 total fish landing record is entered at (3.2) of Form KL based on the record of each fish market. When no fish market records exist, a rough estimate of 1974 fish landings is entered for every major landing place which may be selected as a major landing place for L-II Survey.

Then, the major landing centre is selected by referring to:

1. 1974 fish landing records for each fish market or major landing place, and

2. The number of fishing households with powered boats. (See (4.4) and (4.5) of Form KL).

The selection of major landing places may be done, in most cases, by referring to the fish landing data. However, when the fish landing data is not always reliable, the number of fishing households with powered boats will be a useful index for the selection of a major landing centre.

3. Selection of Sample Villages for L-III Survey

3.1 Number of Sample Villages (Standard sample size)

In principle, the number of sample villages in a district will be the same as the numbers of marine subdistricts in that district, on the assumption that at least one MP is stationed at each subdistrict. However, in some provinces in A area (Aceh, Sumatra Utara, Bengkulu and Lampung) and in most of provinces in B area, the number of MP is about half of the number of marine subdistricts. Thus, in those provinces, one MP takes care of two or more marine subdistricts.

In view of the above situation, the number of sample villages in a district is determined by PFS with the following standards:

1. In a district where the number of MP is more or less the same as the number of marine subdistricts, number of sample villages = number of existing MP × 1.

2. In a district where the number of MP is much smaller than the number of marine subdistricts, number of sample villages = number of existing MP × 2.

The number of man-days required per sample village for the conduct of L-III Survey will be, at the maximum, as follow:

For deciding the number of sample villages in a district, the above man-day requirements should be taken into account together with (i) the number of existing MP, (ii) the volume of other routine work, and (iii) the amount of travel expenses that can be alloted to MP.

3.2 Selection of Sample Villages

PFS determines the number of sample villages for each district based on the standard conditions as referred to in 3.1 above. Then, sample villages are selected by means of “probability proportional to the size of villages (PPS)”.

During the course of field trips of PFS officials to every district, the outcome of sample villages selected by PFS is examined and adjusted in consultation with DFS from the viewpoint of its feasibility. .cl.

4. Selection of Sample Villages for Brackishwater Culture Survey

4.1 Number of Sample Villages (Standard sample size)

In principle the number of sample villages in a district should be the same as the number of subdistricts involving brackishwater culture, on the assumption that at least one MP is stationed at each subdistrict. However, there are some districts where the number of existing MPs, is much smaller than the number of subdistricts involving brackishwater culture.

Therefore, the number of sample villages is determined by the following standards:

1. In a district where the number of MPs is more or less the same as the number of subdistricts, number of sample villages = number of MP × 1.

2. In a district, where the number of MPs is much smaller than the number of subdistricts, number of sample village = number of MP × 2.

The number of man-days required per sample village for the conduct of L-III Survey will be, at the maximum, as follows:

For deciding the number of sample villages in a district, the above man-day requirement should be taken into account, together with (i) the number of existing MP, (ii) the volume of other routine work, and (iii) the amount of travel expenses that can be alloted to MP.

4.2 Selection of Sample Villages

PFS determines the number of sample villages for each district based on the standard conditions, as referred to in 4.1 above. Then, sample villages are selected by means of PFS.

During the course of field trips of PFS officials to every district, the outcome of sample villages selected by PFS is examined and adjusted in consultation with DFS from the viewpoint of its feasibility.

5. Selection of Sample Villages by Means of PPS

The following steps are followed:

1. Firstly, as seen in either Form KL or KB, the accumulated serial number of fishing/ culture households is given throughout all villages.

2. Then, a sampling interval is determined by dividing the total number of fishing/ culture households throughout a district (N) by the number of sample villages (n). Assuming that there are 5 110 fishing households throughout a district and 7 sample villages are to be selected, then, a sampling interval will be N/n = 730.

3. Thereafter, a random start number is selected out of the sampling interval with the use of a random number table. Assume that 524 was selected from 730 as a random starting number.

4. Then, a sampling interval is successively added six times to the random start number, as seen in an example below:

Thus, a village which involves any of the above serial numbers (cumulative column) is taken as a sample village.