Lutjanus sp

Dollu, Efrin A, Maro, Jahved F & Kurang, Rosalina Y, 2023, Analysis of catch results per effort of catching red snapper (Lutjanus sp) in the waters of Lewalu village, Northwest Alor, Alor Regency, International Journal of Fisheries and Aquatic Studies 11 (1), pp. 7-11 : 8-10

A. Potential Resources of Red Snapper ( Lutjanus sp p)

Red Snapper ( Lutjanus sp p) is a type of fish that has a high selling price compared to other types of fish. The fishing gear used by the fishermen of Lewalu Village to catch Red Snapper ( Lutjanus sp ) are hand fishing rods and long line fishing rods. The production of the 2 fishing gear units can be seen in Table 1 .

Table 1 shows that the production of the highest catch was in the hand line fishing gear unit with a total catch of 1904.1 Kg and long line fishing gear with a total catch of 1558.5 Kg. The total catch overall for 1 (one) year of catching is 3462.6 Kg / Year. The types and fishing gear used by fishermen in Lewalu Village are generally still very simple so that it affects the fishing area which is of course adapted to the experience of fishermen and sea and wind conditions that occur. This condition causes fishermen in Lewalu Village to catch fish to fishing areas that are far away. Dafiq, A. H et al.,2019 [ 9] stated that fishermen are trying to find new fishing areas that are more productive because of the tendency for Red Snapper to migrate to deeper areas to find food and do fishing. Spawning, so that the deeper a fishing area will result in differences in the number and weight of the catch. The proportion of catches based on the fishing gear used can be seen in Figure 1 .

Based on Figure 1 , it is explained that there are differences in the proportion of catches obtained for the 2 units of fishing gear used. Handlines get the most catches, which is 55%, while long lines get 45%. Hand line is one type of fishing gear used by traditional fishermen to catch fish in the sea. Hand line is the simplest type of fishing line. This fishing gear consists of a fishing rod, fishing line and ballast or bait. The fishing ground (fishing ground) for operating hand lines is quite open and varied so that hand lines can be operated around the surface to the bottom of the waters, around coastal waters and in the deep sea Pattiasina, S et al.,2020 [ 10]. The number of catches by fishing season can be seen in Figure 2

Figure 2 describes the number of catches of Red Snapper ( Lutjanus sp ) obtained by fishermen during a 12-month period which is very different for certain months, this is adjusted to the fishing season and available resources. The peak season for catching Red Snapper ( Lutjanus sp ) occurs for 4 months, namely from July to October, the moderate season occurs for 3 months, namely April to June, while the famine season occurs for 5 months, namely January, February, March, November and December. The catch in the peak season was 1631.6 kg or as much as 47% of the total catch of Red Snapper ( Lutjanus sp ), in the medium season the catch was 922 kg or 27%, and the lean season the catch was 902 kg or by 26%. Oceanographic conditions of waters in Indonesia are influenced by two seasons, namely the west and east monsoons as a result of changes in the air pressure system in mainland Asia and Australia Usman, A et al., 2014 [ 11] The changing oceanographic conditions of the waters – change according to the season will directly or indirectly affect the productivity of the waters which in turn will affect the behavior of fish grouping, the change of season is very influential on fishing activities and fishing efforts Sumiono, B et al.,2017 [ 12] The production of Red Snapper caught for 1 (one) year is obtained with different fishing efforts/ fishing trips in each fishing gear. The average fishing trip for 2 (two) units of fishing gear used can be seen in Figure 3 .

Figure 3 describes the fluctuation in the number of fishing trips each month for each fishing gear. The lowest fishing trip on long line fishing gear occurred in August with a total of 10 fishing trips and the highest fishing trip occurred in April with 16 fishing trips. The lowest fishing trip was in August with 11 fishing trips, while the highest fishing trip occurred in March, April, May and July with 14 fishing trips. This shows that efforts to increase production can also increase the value of production which means it will also have an impact on increasing income from fishermen, but on the other hand an increase in production means that there will be increased pressure on resource utilization Pralamnita, W. A., & Putra, I. E.2017 [ 13] Fluctuations in catches What happens on each fishing trip is not only influenced by the presence of fish but also by the number of fishing efforts, the success rate of fishing operations, environmental, economic and fishing factors Prisantoso, B. I., & Badrudin, B 2017 [ 14].

B. CPUE

Production per Unit Effort (CPUE) is basically the result of the division between the combined production of Longline and Handline Fishing rods and the effort (Effort) of these two fishing gears. CPUE calculation can be seen in Table 2 .

Table 2 explains that the highest CPUE value was obtained in August, which was 26,071 kg /trip and the lowest was in December, which was 5,573 kg /trip. The highest CPUE value occurred in August due to a decrease in fishing effort from the previous month, from 27 fishing trips to 21 fishing trips. The lowest CPUE value was obtained in December due to an increase in the number of fishing trips from the previous month from 25 fishing trips to 26 trips. The value of CPUE within 1 year has fluctuated and tends to decrease. Azkia, L. I et al., 2015 [ 15], said that one of the characteristics of a fishery condition that has led to an overfishing condition is the decrease in CPUE. The relationship between CPUE value and effort can be seen in Figure 4 .

Based on Figure 3 , it explains the relationship between CPUE value and catching effort. Coefficients a and b were obtained from simple linear regression with effort level as independent variable (x) and CPUE as dependent variable (y). The equation CPUE = 22.928 -0.4332 x, explains that every increase in the number of fishing efforts per x units in each quarter will result in a decrease in the number of Red Snapper fish production by 0.4332 kg /trip. The coefficient of determination or R2 is obtained at 0.118 or 11.80% which indicates a good match between the variables and the model used. Nurhaeda, N et al., 2019 [ 16]; Telussa, R. F., & Ernaningsih, D, 2019 [ 17]. Stated that efforts to increase production from one side can increase the production value and income of fishermen but on the other hand these efforts result in pressure on resource utilization which will have an impact on overfishing.) and will even threaten the sustainability of the resource itself.

C. T Test

Analysis of the catch of Red Snapper ( Lutjanus . sp) from the 2 fishing gears (Rawai Fishing Line and Ulur Fishing Line) operated in Lewalu waters, can be seen in Table 3 .

Based on Table 3 , it is explained that there is a significant difference in the catch that occurred during 12 months of fishing in kg (ά = 0.05). This shows that H0 is rejected because there is a difference in the average catch of each fishing gear (Land line and Rawai fishing line) operated to catch Red Snapper ( Lutjanus sp ). The catch from the fishing line fishing line and line fishing line shows that there is a difference in the average catch, this shows that the ability of each fishing unit is different. The difference was due to differences in fishing effort such as fishing area, number of fishing gear settings, fishing trips and different fishing seasons Oktafiani, R., Pi, A. M., & Pi, P. M, 2013 [ 18]; Rikza, C et al.,2013 [ 19]

Figures

Fig 1: Proportion of fishing gear to catch

Fig 2: Number of Catches by Fishing Season

Fig 3: Graph of the Relationship of Arrest Trips in Each Month

Fig 4: Graph of CPUE Relationship with Arrest Efforts

Tables

Table 1: Production of Red Snapper (Lutjanus sp) in Fishing Equipment Uni

No	Months	Fishing Equipmen Hand Line Long Line		Production quantity (Kg)
1	Januari	96.4	78.3	174.7
2	Februari	98.2	57.4	155.6
3	Maret	112.1	102.4	214.5
4	April	195.2	144.5	339.7
5	Mei	135.2	118.7	253.9
6	Juni	174.2	154.2	328.4
7	Juli	213.3	215.4	428.7
8	Agustus	325.4	222.1	547.5
9	September	221.1	155.9	377
10	Oktober	154.2	124.2	278.4
11	November	89.3	130	219.3
12	Desember	89.5	55.4	144.9
TOTAL		1904.1	1558.5	3462.6

t

Table 3: T Tes

				Test Value = 0
	t	95% Confidence interval of the difference df Sig.(2 tailed) Mean Difference Lower Upper
Catch	11.129	23	.000	144.275 117.46	171.09
Catching tool	14.387	23	.000	1.500 1.28	1.72

Table 3: T Tes