1 Fish Fingerlings Assemblages in Coastal Area of Trang Province Kunwadee Srisuan Research Methodology Program Asst. Prof. Dr. Sarawuth Chesoh ; Advisor, Assoc. Prof. Dr. Apiradee Lim ; Co‐advisor, Dr. Nurin Dureh ; Co‐advisor 2 Outline 1. Introduction 2. Objective 3. Methodology 4. Results 5. Conclusions 3 What is fish fingerlings? • Fish fingerlings is a stage of fish or aquatic animal that has reached the stage where the fins can be extended and where scales have started developing throughout the body. The fish is typically about the size of a finger. Figure from Department of fisheries 4 objective • To reduce 41 families of fish fingerlings in Coastal Area of Trang Province into a small group by using factor analysis 5 Methodology • Data were obtained from Prince of Songkla University, Pattani campus; aquatic ecological database (Chesoh, 2016). • Study period from September 2015 to August 2016 in four sampling sites that represent four districts in Palian, Hat Samran, Kantang and Sikao. • The data consist of 41 different families of fish fingerlings. 6 Sample Collection: Fish Fingerling • Fish fingerlings were collected by using bongo nets and plankton nets. • Identified species in laboratory following the guideline by Delsman(1922), Leis and Rennis (1983), Leis and Carson–Ewart (2000). • The species were counted and the unit of density of fish fingerling is individuals per one thousand cubic meters of water volume. Study area 7 Trang Province, Thailand st4 st3 st2 st1 8 st1 Study area (con.) st1: Yong star beach region Palian District, Muddy beach and mangrove forest st2: Ta-Sea Harbor region st2 Hat Samran District, Muddy sand beach and sea grass st3: Hat Yoa harbor Li Bong Island Kantang st3 District, Muddy beach and mangrove forest st4: Pak Meng Beach, Sikao District, Muddy sand beach, rocky beach, mangrove forest and shrimp farm. st4 Fish fingerling data were collected monthly from September 2015 to August 2016. 12 months x 4 site = 48 observations 9 Factor analysis Factor analysis is data reduction statistical technique for investigating interrelationships among the original variables (fish fingerling density) in an effort to find a new set of variables (factors) that are less than the number of original variables (Dillon & Goldstein, 1984). Factor score is estimated as linear combinations of the original variables as follows: ⋯ Where is factor score, ,,…, are loadings score, and ,…, are fish fingerling density. 10 Factor analysis Density of each 41 fish fingerlings Checking normality distribution and transform data Factor analysis Factor Factor Factor Factor Unique 1 2 3 n ness 11 Result •The correlation plot among fish fingerlings • This plot shows that these fish fingerlings have relationship to each other and possibly do factor analysis. 12 Result •The result from factor analysis showed 5 groups •However, there are some uniqueness, the variance that is 'unique' to the variable and not shared with other fish fingerlings family. Eight fish fingerlings families that got high uniqueness were excluded. The rest were used to analysis in the next process. The result of Factor analysis 13 Factor 1: 13 fish fingerlings Factor 2 : 5fish fingerlings Factor 3 : 5 fish fingerlings Factor 4 : 4fish fingerlings Factor 5 : 6fish fingerlings Factor 1: Anadromous fish fingerling •These fish fingerlings can live in both freshwater and saline water Blenniidae Ambassidae •The habitat of these Carangidae fish fingerlings are at the mouth of river, mangrove and coastal area. Hemiramphidae Gerreidae Scatophagidae Atherinidae Callionymidae 15 Factor 2 :Marine benthic fish fingerling •The fish in this group mostly live in bottom area near the Scorpiaenidae Teraponidae sand surface. Sillaginidae Sphyraenidae 16 Factor 3: Deep coastal area •The fish in this group mostly live in deep Megalopidae Gobiidae Sciaenidae coastal area. Leiognathidae Exocoetidae 17 Factor 4: Coastal, muddy sand beach • The fish that can live saline water • The habitat is at the coastal area Syngnathidae Siganidae Synodontidae Palaemonidae 18 Factor 5: Coral reef area •The fish in this group mostly live in coral reef area. Monacanthidae paracephalopod Labridae st2 Clupeidae Engraulidae Mullidae 19 Uniqueness Families Elopidae Belonidae Bregmacerotidae Mugilidae Soleidae Bothidae Lutjanidae Mysidae 20 Conclusion • Factor analysis gave five assemblages. Those which have a correlation inside each family group were selected and grouped as one family. • Habitat attributes associated with the density of the five groups of fish fingerlings. 21 Thank you.