Overview of Gulf of Mottama Wetland (GoMW) & Size Distribution and Economic Status of Sea Bass in Myanmar

The present study was conducted the status of sea bass from Kokko and Kyuntone of The Gulf of Motttama Wetland (GoMW) area in Thanatpin Township in Bago Region Myanmar from September 2019 to August 2020. Fifty specimens were monthly collected, measured and weighed. Invoices of sea bass were collected for the depot and fish sellers by monthly. In Kokko, mean value of standard length and body weight were highest in March (32.70±1.58, 660.7±112.23). The mean value of standard length was peak in January (31.39±7.16) but peak of body weight was in March (963.24±280.86) in Kyuntone villages. The lowest mean value of standard length and body weight were found in June at both study areas. According to the invoice data revealed that monthly catch weight of sea bass is most abundance in October (829.92) kg in Kokko, (339.12) kg in Kyuntone. Based on price of relations to size group, small size C &lt; 300g (41%) was mostly abundance in Kokko and in Kyuntone small size C &lt; 300g (35%) was second abundance. Specimens were not landed in April and May. In June, young specimens were very rarely seen in both study sites. The important roles of wetland fishes, the economic valuation of GOMW in Myanmar and samples of fishing gear and value chain of sea bass in Myanmar was expressed in this study.


Introduction
Sea bass fishes are family Latidae of the order Perciformes. Sea bass are found in coastal waters, estuaries and fresh streams. They are catadromous in that they migrate from freshwater back to estuaries and oceanic water to spawn and then return to fresh water [42][43][44][45][46][47][48][49]. Lates uwisara (Barramudi) are valuable both as recreational and commercial fish with a high fairly stable price. They are stocked in lake and ponds for recreational fishery and are also fished in freshwater creeks and estuaries [41-48, 74, 97, 136, 151]. In Myanmar, sea bass has both domestic and international demand and can be grown in fresh, salt or seawater. Over the past decade, the market for sea bass has markedly in the Myeik archipelago in Tanintharyi Region as well as in Yangon and also Ayeyarwady regions. Myeik which has been commercially breeding sea bass for 10 years [156,158]. The Gulf of Mottama wetland (GoMW) conservation area was declared the sixth Ramsar Site in Myanmar on Wednesday, on 10 May 2017 [25,26,99,[118][119][120][139][140][141]. The Gulf of Mottama Wetland (GoMW) of which situated at the mouth of Sittaung River is considered a unique estuarine mudflat environment that is home to a great variety of flora and fauna [33,36,130,139]. This Gulf supports a large number of species such as marine avifauna, invertebrates and up to 150,000 migratory water birds in non-breeding season [1, 25,26,38,39]. The gulf of Mottama wetland (GoMW) also supports thousands of local and regional people by providing fishes and vegetation [7,24,[121][122][123]. On the world, one billion people rely on fishes as sole source of protein and 35 million people are directly engaged with fisheries and 95% of them live in developing countries and the majority are smallscale fishers [101,139,153,155]. The new coverage would be broadened to include the areas from Thaton and Paung Townships in Mon state to Kawa and Thanatpin Township in Bago [103,140,141,143,156]. In Myanmar, wetland fishes are vital role of wetland economic valuation and ecosystem of wetland [3,51, 60,67]. The direct value of wetland fishes is local trading and international trading in Myanmar wetland areas. Ecosystem of Wetlands support resident fishes that both play vital roles in the aquatic -terrestrial trophic web [9, 10, 20, 27] and provide recreational and commercial fisheries harvests worth billions of dollars annually [40,89,124,135]. The community structure of fishes can predict important informations for climatic signals [22,23,57,60,76,85,105,144] and also provide information about wetland conditions and health [67,68,70,75]. During the last decade, a great deal of studies have addressed a diversity of topics concerning with wetland fish communities including species coexistence and dispersal [19,21,35,38,56], the value of fishes as prey for wetland predators [28,77], effect of wetland connectivity on assemblage composition, nursery value and fisheries harvests [16,58,63,128,132], seasonal use of wetlands as dry-season refugia [123], flooding [34,91], hypoxia [90], responses to human perturbation [59,114,147] and relationship with physicochemical characteristics such as salinity [77,79,86,92,110]. The former studies demonstrated that the key roles of wetland fish communities and nature and variability of environmental factors, fish species distributions and community composition [18,67]. The present study was conducted the status of sea bass from Kokko and Kyuntone of The Gulf of Mottama wetland (GoMW) area in Thanatpin Township in Bago Region with the following objectives. Indirect values of fish can support human health [2], connectivity of wetland biodiversity and ecosystem of environment [2, 60,91]. Bottom temperature, depth, surface temperature, sediment and bottom salinity were most limiting of species habitats of fish in wetlands, in seas and in oceans [60,115]. Some fish species are foods of avifauna and fishes are vital connectivity of ecosystem services between biodiversity in wetlands, in coastal regions, in seas, and also in oceans [81,93,94,125]. Moreover, fishes of wetlands, rivers, seas, oceans are main economic supports of developing countries and they are valuable natural resources for humans [54,55,66]. Due to poor knowledge in conservation, illegal fishing and over fishing daily threaten diversity of fishes. Although, June, July, August are the strictly prohibiting of fishing in Protected Areas (PA), especially, wetlands, the catch weights have still founded at this prohibited time in Myanmar. The analysis of fishing gear is also vial roles for researches of wetland fishes and passive gear and active gear can be found in fishing. Passive gears are necessary the target fishes to enter them and become trapped and active gears can capture fish either by moving faster than fish do or by enclosing fish quickly [67]. The scope of this study recorded the morphometric measurement of sea bass in the study area, observed the catch rate of sea bass and also investigated the prices according to sea bass sizes and value change of sea bass. The correlation between length and weight of sea bass and the utilizing of fishing gear were analyzed in this study.

Background of Study
Wetland ecosystem and economic valuation can support much benefits to humans and their environment. In Myanmar, conservation of wetlands cannot sustain due to poor environmental conservation knowledge of residents who live near wetland area, insufficient staffs, low budgets and other statements of problems [12]. In wetland areas, trading fishes are becoming first highest earning income, cultivations of paddy, peas and vegetation are second highest earning income and resorts, travel and tours are third highest earning income. During COVID-19 global pandemic periods, the economic status of our world evidently decrease especially aspects of travel and tours. The numbers of ecotourism and local visitors of wetlands have started decreasing since COVID-19 pandemic and then, unfortunately, Myanmar met in political conflicts, income of wetlands are evidently decreasing in travel and tours sessions. However, trading fish can sustain economic valuation of wetland areas and the income of cultivation session of wetlands are decreasing in a just only few numbers. By observing those conditions, trading of fish is key income of wetlands. This study emphasized local income of sea bass and value change in local areas of Myanmar. In the scope of this study, the Gulf of Mottama wetland (GoMW) was chosen and the GoMW is one of most important and unique wetland systems on the world [4, 29,137]. One of the greatest challenges in wetlands of Myanmar is under threat and pressure by uncoordinated governance and unstainable use of coastal and wetland natural resources, overfishing and habitat destruction of fauna [54,55]. The Gulf of Mottama (GoM) is situated along Mon State and Bago City and fisheries are primarily fresh water, while coastal fisheries are much more important in Mon State [137]. This study focused on morphological study of sea bass fish and economic value change in local area of Myanmar. By length and body weight of sea bass can generally obtain highest prices and the demands of sea bass in local area are higher more and more and the residents favor the taste of sea bass [6,8,10,70,115]. The more abundance populations of sea bass can be found in Kokko and Kyuntone villages than other villages along The Gulf of Mottama Wetland (GoMW). Even if there is no fish trading internationally, the economic valuation of wetland fish trading can support earning for residents of wetland areas and illegal fishing can even be decreased, however, population of people are daily increasing and the demand of fish product can increase relating to human populations and so, the sustainability of biodiversity is necessary to control not to declining of ecosystem services and environmental conservation [56,57,133]. Studying of fish can be divided into two categories, (i) quantitative fish sampling method and (ii) qualitative fish sampling method. Quantitative fish sampling methods aim to study measure of fish abundance concerning with relative abundance for communities or mark-recapture estimate for specific taxa, biomass, diversity with inter values concerning with counts and ages, direct measurement of fish concerning with fish length and body weight, habitat characteristics concerning with water temperature, depth of water, inhabiting territorial waters, assemblage, community metrics concerning with indices of diversity, similarity or dissimilarity and ratios concerning with catch-per-unit-effort [67]. Qualitative sampling method targets on fish sex, species lists, descriptions of frequency of occurrence in term of rare uncommon, common and ubiquitous [67]. In this study, data included direct measurements of fish such as fish length and body weight by using quantitative sampling method.

The Gulf of Mottama Wetland (GoMW)
In Myanmar, there are 18 wetland sites as an extraordinary diversity of wetlands such as mountainous wetlands, large freshwater wetlands, lakes to coastal wetlands like as mangroves, mudflats and coral reefs [25,26] and currently 6 wetland sites have been designated as Wetlands of International Importance as Ramsar Sites with a surface area of 278,679 hectares [118][119][120] [69,[118][119][120]. In this study, The GoMW was chosen as research area and the fish with the highest price of local market, sea bass was chosen as study sample. The GoMW is covered by about 150,000 hectares on the boundary areas of Bago Region in the north and Yangon Region in the west and it is also connected to the Bay of Bengal and it is also covered by 45,000 hectares of area within a straight line between the southern point of Pyapon Township in Ayeyarwady Region and the southern point of Mudon Township in Mon State form the mouth of the Sittaung river to the eastern coasts of Kyaikto and Bilin Townships [25,26,39,137]. The GoMW have been designated as East Asian-Australasian Flyway Partnership, (EAAFP) Flyway Network site in 2014 by recognition of its importance for migratory waterbirds. The GoMW is a main migratory stopover as a vitally important habitat for Critically Endangered Spoon-billed Sandpiper, Calidris pygmaea [1, 65,126] of which there are fewer than 500 populations of the species left on the world [82,83,103,140,141,143,156]. The GoMW also supports a huge diversity of fish, crustaceans and other fauna and flora and it has already been recognized as a wetland of global significance.  [126]. The international Universities include as corporation of GoMW, (i) HAFL in Switzerland and (ii) Prince Songkla University in Thailand. Local and International Corporations tend to sustain conservation of the GoMW and GoM management plans [39,126]. The GoM is known as one of the most dynamic estuaries on the world and it is comprising one of the largest areas of mudflats, making it of outstanding global conservation value [25,26,117,154]. About 75,000 hectares are covered with slit and several creeks flow into GoMW and [103,140,141,143,156] and the GoM has extensive mud flats covering around 4,000 km 2 [127,87], the largest mud falt zone in Southeast Asia due to the flow of sediments from four large rivers, the Ayeyarwady, Yangon, Sittaung and Tahnlwin [127] and thus it becomes the largest mud water zone in the world thus, the vast area of silts of GoMW provides livelihoods for residential people. The Gulf exhibits a tidal cycle which is extremely pronounced in speed and volume, gathering from a width of around 100km and concentrating in a funnelshaped bay to produce over 3m heights on spring tides in the upper estuary and the tide can reach in some places up to 7m. The GoM is also one of the most extensive and important intertidal ecosystem in the world. The 85% of residents in GoMW are lower class people and most of them rely on fishery for their daily expenditures and the more international projects in the GoMW, the more job opportunities the residents obtain.

Sustainability of Economic Valuation of Wetland
In Myanmar, there is very poor in natural resource conservation of wetlands due to low budgets, insufficient staffs, poor techniques, poor environmental conservation knowledge, insufficient local technicians and conservationists. Myanmar has 6 Ramsar sites and among them, the GoMW has many international cooperation to sustain its ecosystem, conservation and economic valuation. Generally, the biodiversity of wetlands is vital for direct economic value of wetlands and they can also support ecosystem services indirectly as indirect economic value [3, 51, 52, 73, 100, 102,104]. There are five capitals of wetland economic valuations, (i) Natural Capital, (ii) Human Capital, (iii) Social Capital, (iv) Financial Capital and (v) Manufactured Capital [68]. Our wetlands is parental supporters for Natural Capital such as cleaning water resource, rice, vegetation, fishes, meats, timbers and places of recreation for human, wildlife habitats and ecosystem services and other useful things of wetland nature for living organisms [54,55,67,88,99,134]. Human Capital is divided into three categories (i) Financial makers (ii) conservationists (iii) consumers. These three categories of human capital are vital roles of sustainability of wetlands. Some wetlands in Myanmar have many bad infrastructures and those problems cannot easily to be reformed because of low budgets from Government and insufficient numbers of educated staffs in wetlands [155,156] and other environmental protected area. By unexpected political conflicts of Myanmar in 2021, it will become bad prospects for budgets for environmental conservation in Myanmar. And also, since 2019, our world has faced with dreadful COVID-19 and thus, economic valuation of wetlands in Myanmar have decreased in a few number in international trading of fishes, rice and crops and it has declined in highest number in Eco-tourisms and the other social status has also suffering with bad impacts. Myanmar is necessary to establish rehabilitations in aspects of Nation sovereignty, Economy, Education and Social Status after COVID-19 and local political conflicts and so it will also be difficulty for budgets of wetland conservation and other environmental aspects. However, economic valuation of wetlands can support some people who live near their areas by supporting their basic needs. If human capital can control the sustainability of wetlands' natural capital, the residents are not necessary their daily expenditures even without international trading and Eco-tourisms [66,116]. The first one of human capital, financial makers in wetlands are owners of resorts, larger scale fishery, small scale fishery, legal timber trading and transporting workers. Depending on Myanmar economic state, small scale fishery in wetlands are 75% of financial makers and 75% of residents in wetlands area depend on fishery for their monetary issues. The government tax of wetland resorts, large scale fishery and legal timber trading can support budgets for wetland conservation and small scale fishery can sustain human capitals as basic human resources and transporting workers are attracting human capitals to do more business in wetland areas with comfortable transportation. If human capitals have the sufficient conservation knowledge, human capital can also vice versa support natural capital sustainability and wise use of natural resources in wetlands. The second one of human capital, conservationists are vital for wetlands and they will be from government or some environmental organizations or international environmental organizations or local/ international non-government organizations (NGOs). In Myanmar wetlands, the second person of human capital is essential required category for sustainable development of wetlands. The third one of human capital, consumers are plenty numbers and this category aims to local consumers and international consumers. Some people are moving to wetland areas from other places and 90% of migrant people depend on fishing for their livelihood benefits. Encroaching people has become one of statement of problems for Myanmar wetlands since 10 years ago. Social Capital of wetlands is vital roles for economic valuation of wetland and social capital can lead the improvement of financial capital and human capital and by establishing big social capital, the other capital is ready to sustain their good effects to economic valuation of wetlands. If the four capital are strong in wetlands, manufactured capital can also be ready to sustain economic valuation of wetlands by supporting more financial incomes of residents of wetland area [106]. The big social capital such as international investments in wetlands can carry new innovation for economic status of residents of wetland areas including job opportunities for basic class people and also other social capital such as international conservationists and some cooperation of sustainable development programs can share valuable knowledge of wetland conservation and objectives of wise use programs to those residents. The sustainability of five capitals of wetland economic valuation is key for wetlands and they are livelihood benefits of economy and also ecosystem services of wetlands and every conservation perspectives for wetland forest, wetland biodiversity and other natural resources [3, 51, 52, 73, 100, 102,124,133,159]. Wetland resort business is one of direct economic value of wetland and it is necessary to improve for foreign currency and bird watching is most popular tourist attraction one in Myanmar and thus, the resort business men should collaborate to conserve biodiversity cycles. The waste of visitors, especially plastic waste is needed to control and systematically throw away. Biodiversity cycles can attractive to local scientific researchers, international scientific researchers and all conservationists and also tourists who want to take recreation. Wetlands are also becoming places to share ethical, cultural, other traditional value, modern techniques, traditional techniques and various educational issues. The following two methods are aiming to sustainability and Development of wetland economic valuation.
1.3.1. SCIBE -Method SCIBE method means that it is a method of sustainable to Capitals and Improving Benefits of Economy. This method is based on five capitals of wetland economic valuation. If natural capital cannot control to conserve, our wetland ecosystem services, economic valuation and all benefited natural machinery will surely disappear. If there is no natural resources, human capital cannot not create social capital, financial capital and manufacture capital [160]. Natural capital and human capital mutually depend on each other and if there is no human capital for natural resources, the nature will give ecosystem services to some living organisms including wildlife, however, just only natural capital cannot create the innovation for our world and the precious benefits of natural resources are fruitless without consumers. Thus, according to our sustainable goals, five capitals need to sustain for economic valuation and for increasing popularity of people, the benefits of economy should try to improve with sustainability of five capitals. This method can provide not only wetland economic valuation but also other aspects of economy.
Where EV= Economic Valuation, no. of typical capital in the above equation means that number of capitals that cannot have the loss in business of economic valuation.

EGIETRW -Method
EGIETRW method means that it is a method of enhancing GROSS Income of Eco-Tourism by reforming Wetlands. In Myanmar and other developing counties, business sector of Travels and Tours sessions is important one of foreign incomes and it is also important for direct value of wetland economic valuation. Residents of wetland area has used the natural resources of wetlands as their basic jobs before resorts and hotels near wetland regions and thus, social capital cannot use effectively and also manufactured capitals and financial capital flows within the local boundary areas and poor lives of residents could change to middle class and high class. When resorts and hotels have hired some areas of wetland regions, residents of wetland area had a chance to use natural resources of wetlands effectively from some campaigns of environmental conservation, travel costs from visitors, traditional and culture of other different countries, chance of international trading for fishes, home furniture from timber and local tradition utensils. The important problem of wetland in Myanmar is "how to control wastes, especially wastes of plastic bags in wetlands" and they are used to throw the wastes of visitors to wetlands areas, rivers and oceans and this unsystematically waste throwing way can give enormous dan-gers to wildlife animals and aquatic animals and even birds and the next problem is encroaching people to wetland boundaries without permission from Government [78] and water restored areas of wetlands are full with encroaching people and in the rainy seasons, wetlands cannot have enough spaces of storage water and waterbirds of wetlands cannot have enough stopovers and the habitats for wetland waterbirds, migratory birds and fishes gradually declined [1, 32,37,61,65]. For that condition, the numbers of birdwatchers of wetlands will decrease and it directly impact on biodiversity and ecosystem services of wetlands. The bad infrastructures which become from human capital and their wastes is necessary to reform before declining ecosystem services. Good ecosystem services, Healthy Biodiversity, Cleaning surrounding of wetland and Recreation services are key to enhance gross income of wetlands and they can support to earn foreign currency from Eco-tourism sessions.

Behaviors and habitats of Sea bass
A diverse group of common names of sea bass are "Barramundi perch" in Australia, Giant sea perch" in Papua New Guinea, "Sea bass" in South-east Asia and also known as "Ka-kadit" in juvenile state and "Ka-tha-baung" in adult state or in female status in Myanmar [42-49, 121, 129, 157, 158]. The taxonomy of sea bass is complicated by the existence of several nominal species presently relegated to its synonymy [43,129]. The localities and specimens of sea bass are L. heptadactylus [72,107], (unknown locality and unknown type), L.vacti [56,107], no types, type locality Ganges River, Bengal, India; L. nobilis [31,107], syntypes frommultiple localities, type locality Pondicherry, India; L. cavifrons [5, 107], type lost, type locality "somewhere in Torres Straits or the coast of New Guinea"; and L. darwiniensis [84,107], type in poor condition, type locality "Darwin, Australia", L calcarifer [13-17, 42, 107, 150, 157, 158], type Lates, type locality "Myanmar and Sri Lanka, from Queensland coast of Australia westwards at least to India [109,112,113,125,157], from tropical Austria through Indonesia, from Persian Gulf to China, Singapore and Thailand" and L. uwisara [107], type Lates, type locality " Eastern Myanmar"   The representatives of sea bass are catadromous and they are born in sea water and then they spend most of their time in fresh water [10, 18,95,96,150]. Sea bass inhabits freshwater, brackish, marine habitats such as streams, lakes, estuaries and coastal water [42,62,80,104,128,150,158]. The newly -hatched larvae are distributed along the coastline of brackishwater estuaries while 1cm size larvae can be found in freshwater bodies [11]. Under natural condition, sea bass grows in fresh water and migrates to more saline water for spawning. The sea bass is one of the species with a high potential for cultivation. Sea bass is widely commercial in South East Asia, it is popular marine food fish of high market value and culture of sea bass has been successful in coastal regions in Myanmar [111,145,146,158]. Sea bass spawn naturally in captivity [145] and it is used to migrate sea only to breed, a task achieved by its ability to tolerate the complete range of salinities [95,96]. Alternatively, sea bass can be induced to spawn by hormonal or environmental manipulations [49,50,70]. Smaller fishes of sea bass can be found in rivers and streams and lager fishes in the ocean and estuaries [42,109] and sea bass is dermersal and it is serially hermaphroditic meaning that it can transform from male to female at three to eight years of age [42, 53] and its sex ratio is 3.8 males : 1female [42,53,95,96,109,148,149] with males reaching 37 to 72 cm and then, they are changing into females starting at 73 cm, at around five years, three to five years, or six to eight years depending on the source [40, 53, 95, 96].

Study Area
The present study was conducted from Kokko Tan  According to the result of this study 75% of household are working fishery in Kokko village but Kyuntone village is far from Sittaung river banks in GoMW and they depend on three artificial lakes for fishery and just only 30% of household are working fishery. In the two study areas of this research, sea bass trading is one of the important commercial roles and farming is followed by fishery.

Study Period
Study period was lasted from September 2019 to August 2020.

Method
Fifty Specimens were randomly collected and measured total length, standard length and body weight from Kokko Tan and Kyuntone villages by monthly. Invoice of sea bass were collected monthly from the depot and fish sellers of two study area. Collected data were entered into micro-soft excel for calculations and analyzed. Data is presented in the following section using photographs, table, graph and histogram. And then the data of two study areas were compared and discussed.           (6), fishery is the main commercial status in Kokko Tan village and cultivation in farmlands is second one and in Kyunetone, cultivation in farmlands is first role of commercial status and fishery is second one. By this result, some villagers are not only transporting workers and but also farmhands, some are not only fishermen and but also farmhands, some are not only students but also fishermen and some are not only students but also farmhand because of low income of their family.  1-15 15.1-19 19.1-23 23.1-27 27.1-31 31.1-35 35.1-39 39.1-43 Figure 12).  Specimens were not found in April and May. Because all channel, creek and wild pond had no water and dried. Some local fishermen told that they caught very small fry specimen from the sea in these month. But, very small specimens were recorded in June.

Results
According to the invoice data, monthly catch weight of sea bass is most abundance in October (829. 62 Figure  13).  According to the invoice, catch weight by price size were classified into Large (A>600g), Medium (B 300-600g), Small (C<300). Based on the price size, price group small (C) was most abundance in Kokko Tan 41% and followed by medium (B) 35% and large (A) 24%. All price size groups were most abundance in October at Kokko Tan. Although price group (B) was most abundance 41% and followed by size group small (C) 35% and size group (24) 28% in Kyuntone. Price group (A) and (B) were more abundance in October; price group (C) was more abundance in January (Table 4, Figure 14).  Very small specimens were often observed with tides informed by local fishermen in these months. In June, young specimens were very rarely seen in both study sites and no invoice was got until June (Table 5, Figure 15).     (Table 6 and Figure 17).

Figure 18.
Utilizing fishing gear of sea bass in study areas.
In figure (18), utilize fishing gear of sea bass in both villages were stow net (Kyar pa zat pike) with 5 -15 cm, set gill net (Tar pike) with 5 -12.5 cm, drift gill net (Hmaw pike) 5 -12.5 cm, cast net (lat pyit kyun) 2.2 -5.5 cm of raining season (June -August). In cold season of (Sept -Dec) utilize the gill net (swae pike) 5 -15 cm. In dry season, fisher were moved to the joint area of Sittaung river and in the shallow water of near the Gulf area utilize fishing gear are depend on the water level such as cast net (lat pyit kyun) 2.2 -5.5 cm and set gill net (Tar pike) with 5 -12.5 cm, gill net (swae pike) 5 -15 cm (Fig. 18). Fishermen daily catch fish in GoMW to sell their local dealers in their village, or neighbouring villages. Among many species of wetland fishes, Sea bass (Ka-kadit) is the high price fish in Myanmar and 87% of fish eater are favor, to eat sea bass (ka-kadit) due to its yummy taste and thus sea bass becomes one of the important commercial fish species for increasing demand of fish eaters. Moreover, sea bass or barramundi or Lates calcarifer [14,35] is a commercially valuable, carnivorous, marine teleost fish, the largest order of vertebrates, comprising ∼40% of all bony fishes (e.g., cichlids, sunfishes/bluegills, damselfishes, basses, and perches) and a wide geographic distribution [101,150,158]. Dealers usually give advances money and in this way the fishers are fixed with their dealer. Although the fishermen were sometime sell to the other dealers. The small-scale village dealers buy the sea bass from regular of about 20 fishers in Kokko Tan that operates on a large scale sending to their fishes to Bago Division. The next way is sent to Yangon Division, the main international trading place of Myanmar. In time of wild pond harvest, some fish owner directly sent to Bago Division or Yangon Division. There is no small scale fish collector in Kyuntone. So, the small-scale neighbouring villages of Kalachaungyi dealers were buys sea bass and others fishes from approximately 15 fisher regularly in kyuntone. The next way is Kyuntone to Thanatpin Township and Bago Division. The third way is Thanatpin and Bago sell to Yangon (Figure 16). Sea bass is the highest price in Yangon.

Discussion
During the study period, the largest number of fish in the 31-35 cm category were found in Kyuntone in January to March while very few were found in Kokko Tan. Fish > 35cm were found in Kyuntone during January to March, while only a very few where found in Kokko. The largest size 39-47 cm that will not found at Kokko Tan. This may be suggest that size range of sea bass in Kyuntone was larger than in Kokko Tan (Table 1, Figure 9, 10, 11).
In Kokko Tan, mean value of standard length and body weight were highest in March (32.70±1.58, 660.7±112.23). The mean value of standard length was peak in January (31.39±7.16) but mean value of body weight were peak in March (963.24±280.86) in Kyuntone. According to this point, sea bass were nearly mature and migrate to spawning ground. The lowest mean value of standard length and body weight were found in June (12.62±4.78, 87.33±66.62), (9.07 ±0. 85, 43.97 ±16.66) in Kokko Tan and Kyuntone. This may be due to young specimens were returned from sea to freshwater to spend most of their lives (Table 2, Figure 12).
According to the invoice data revealed that monthly catch weight of sea bass is most abundance in October (829.92) kg in Kokko, (339.12) kg in Kyuntone. October was nearly end of the raining season, in all channels, creeks and lakes were shallow water. So, fishes are caught more readily in October when the water level is low. Moreover, Wild ponds were start harvest in this month. The lowest in March (22.4) kg in Kokko and (48.52) kg in Kyuntone. It may be due to migrate to the sea to breed (Table 3, Figure 13).
Based on price of relations to size group, small size C < 300g (41%) was mostly abundance in Kokko and in Kyuntone small size C< 300g (35%) was second abundance. Size group C included very small specimens of under 165g. This size is prohibited by Department of fishery therefore this size should not be catched and follow the law of fisheries especially during the breeding season of April to July (Table 4, Figure 14).
Specimens were not landed in April and May. They migrate to spawn to the sea in these months [48][49][50]71,98,138]. Very small specimens were often observed with tides in April and May informed by local fisherman. In June, young specimens were very rarely seen in both study sites.
Lates calcarifer is Catadromous migrating to the mouth of the river and estuaries in order to breed [95,96,109,131,152]. There is one spawning season per year towards the end of the dry season and the beginning of raining season in the period from October to February [96]. In this study, the findings are not coincide with the finding of above authors. This may be due to the environmental difference of studied areas.
April and May is the onset of breeding season in sea bass and June is start growing months; onset of the raining season and coincide with the spawning period. For the sustainability of sea bass, should be aware of knowledge sharing to local people especially fisherman focus on breeding season to follow 'the fishery act' by Department of fishery and participate in conservation management.

Conclusions
Sea bass is the most popular commercial fish in South East Asia and the Gulf of Mottama Wetland (GoMW) is suitable habitat for sea bass. In this study, Kokko Tan village is nearer GoMW than Kyuntone village and both villages are prior to fishery and cultivation on farmland. Wetland fish species are valuable for both conservation ecosystem service and commercial status and they are main sources of food. Human Capital for fishery and cultivation is enough in Kokko Tan and Kyuntone village, nevertheless, social capital and manufacture capital are needed to improve for economic valuation of those two villages and GoMW. By the reason of low income of households, 12% of people in student ages are just working without schooling and thus, the educational status of those two villages are bad prospects for educated human capital. The villagers are familiar with fishery since their adolescences and thus, if they have knowledge for conservation of environment, especially wetland areas, human capital can improve natural capital, financial capital, social capital and also manufacture capital by systematical trading of natural resources of GoMW.  Acknowledgments: In this section, you can acknowledge any support given which is not covered by the author contribution or funding sections. This may include administrative and technical support, or donations in kind (e.g., materials used for experiments).

Conflicts of Interest:
The authors declared that there is no potential conflicts of interest with this research, authorship and publication of this article. The authors took the responsibilities, concerning with our research.