- Vietnam Journal of Agricultural Sciences. - 806 Vietnam Journal of Agricultural Sciences. - Eleotridae) in Estuarine and Coastal Areas of the Mekong Delta. - The study aimed to investigate morphometric and meristic variability in the mud sleeper Butis koilomatodon (Bleeker, 1849) in the Mekong Delta. - In the present research, the parameters of morphometry and measurement, including the head length, body depth, eye diameter, distance of the two eyes, and the interrelationships among the morphometric variables, were determined. - The results revealed that the total length and weight of the fish changed by sex, season, habitat, and the interaction between the seasons and habitats.. - The outcomes also showed that the body size of this species was larger in the dry season and the largest fish were found in Duyen Hai and Tra Vinh provinces.. - (Ibáñez-Aguirre et al., 2006). - In classification, this information has been useful to classify fish (Nelson et al., 2016) and measure differences and relationships among congeners (Turan et al., 2006). - Besides, they have also been used to study variations due to environmental factors (Hossain et al., 2009). - Sandlund et al. - Butis koilomatodon (Bleeker, 1849) belongs to the family Eleotridae, order Gobiiformes, and is found along the Indo-Western Pacific region as a native species (Dawson, 1973). - However, it is considered an invasive species in northeastern Brazil, competing with other native gobies for food and habitat (Macieira et al., 2012;. - GuimarãEs et al., 2017). - This mud goby usually dwells in estuaries and mangrove creeks with salinity from 3.8‰ to 37.0‰ (Contente et al., 2016). - koilomatodon is found in the Mekong Delta (Rainboth, 1996. - Tran et al., 2013), especially in coastal areas. - koilomatodon have been fragmented and insufficient (Soares et al., 2012. - Contente et al., 2016. - The average annual temperature is about 27 o C (Le et al., 2006). - Some of the abiotic factors collected by the present work were water temperature, pH (by a thermometer-Model:. - HI98127), and salinity (by a refractometer- Model: 950.0100 PPT-ATC) in each of the six habitats.. - The nets were 5 m long with 1.5 cm mesh size in the cod-end and 2.5 cm in the mouth. - When the tide was the highest, trawl nets were set up near the edge of the mangrove forest. - The collected specimens were preserved in 5.0% formalin and classified based on their external morphology according to the report of Tran et al. - (2013) in the laboratory. - The fish sexes were differentiated based on the morphology of urogenital papilla, e.g., round in females and narrow in males (Dinh et al., 2020).. - In the zoological laboratory, B. - Some of the morphometric and meristic data were taken according to Murdy (1989) and Daud et al.. - 808 Vietnam Journal of Agricultural Sciences Note. - Sampling locations map in the Mekong Delta. - Vegetation and water environment parameters There were many kinds of mangrove vegetation in the sampled sites such as Nypa fruticans Wurmb, Avicennia marna (Forssk.) Vierh., Sonneratia caseolaris (L.) A. - Note: Total length (TL), Standard length (SL), Head length (HL), Body depth (BD), Eye diameter (ED), and Distance of two eyes (DE) (Daud et al., 2005).. - koilomatodon in the present study Table 1. - The average values of temperature, pH, and salinity in the six sites are presented in Table 1.. - The results showed that there were no remarkable differences in the average temperature and pH values among the six studied habitats. - geographic feature is a possible reason for the difference in the salinity parameter.. - koilomatodon were the same as the descriptions of Macieira et al. - (2012) and GuimarãEs et al.. - (2017) of this species along the Brazilian coast, and of Yokoo et al. - 810 Vietnam Journal of Agricultural Sciences. - Specimens of Butis koilomatodon (A: Male and B: Female) collected in coastal areas in the Mekong Delta Table 2. - Morphometry Category Number of fish Mean ± SE. - Fish total length (cm) Male . - Fish total length (cm) Dry . - koilomaton from Butis congeners (Yokoo et al., 2006).. - The variable comparison of total length (TL) and body weight (W) of the 1,063 studied specimens of B. - The results of the t-test showed the average weight and the total length of males were significantly higher than in females (t-test, t Ws = 10.930, t TLs = 12.734, P<. - Additionally, the TL and W average values were higher in the dry season than the wet season at the significance level of 1% (t-test, t Ws. - The males were larger than females, which was corroborated by the proposed results of Soares et al. - The TLs and Ws in the dry season were also significantly greater than in the wet season. - In contrast, a study conducted in Pakistan revealed that gobies were not affected by the seasons (Mahmood et al., 2012. - Dinh et al., 2016a). - The TLs and Ws of some gobiid species co-living in the Mekong Delta were higher in the wet season than in dry season, for instance for Parapocryptes serperaster (Richardson, 1846) (Dinh et al., 2016b), Trypauchen vagina (Bloch &. - koilomatodon could reach the highest TL and W values in the dry season.. - cm, respectively) and the lowest values in the remaining four sampling sites CLDST, TDST, DHBL, and DDCM (F = 20.199, P<. - species change by habitat and reached the highest values in the DHTV habitat.. - Likely, the changes in the TLs of B. - Table 3 shows the meristic parameters ED, DE, BD, HL, HL/TL, and BD/TL between males and females of the mudsleeper B. - The results revealed that some of the factors depended on the gender. - There were no statistical differences in the other parameters (ANOVA, P>. - the vertical bar is the standard error of the mean. - 812 Vietnam Journal of Agricultural Sciences Note: DHTV: Duyen Hai, Tra Vinh. - The variation in fish total length at the six sampling sites. - The influence of season × gender on the variation of fish body weight. - The influence of season × site on the variation of fish body weight. - The influence of season × gender on the variation of fish total length. - Table 4 reveals the differences of the meristic parameters between the dry and wet seasons. - Fish total length (TL, cm). - 814 Vietnam Journal of Agricultural Sciences. - were found in Periophthalmodon septemradiatus (Dinh et al., 2018) and in Glossogobius Sparsipapillus (Nguyen et al., 2020), two goby species that co-habitat with B. - koilomatodon in the Mekong delta.. - The data indicated that this species reached the highest values of body size in the dry season. - A new record of the non-native fish species Butis koilomatodon (Bleeker 1849) (Teleostei: Eleotridae) for southeastern Brazil. - Pertanika Journal of Tropical Agricultural Science. - Journal of Science and Technology. - Growth pattern and body condition of Trypauchen vagina in the Mekong Delta, Vietnam.. - The Journal of Animal and Plant Sciences. - Morphometric, growth and condition factor variations of Boleophthalmus boddarti in the Mekong delta, Vietnam. - Iranian Journal of Fisheries Sciences. - Morphometrics and condition factor dynamics of the goby Stigmatogobius pleurostigma (Bleeker 1849) during dry and wet seasons in the. - Morphometric variation of Parapocryptes serperaster (Gobiidae) in dry and wet seasons in the Mekong Delta, Vietnam. - Reproductive biology of the burrow dwelling goby Parapocryptes serperaster. - Reproductive biology of the unique mudskipper Periophthalmodon septemradiatus living from estuary to upstream of the Hau River. - Length-weight and morphometric relationships of the Tank goby Glossogobius giuris (Hamilton, 1822) (Perciformes:. - Gobiidae) in the Ganges of Northwestern Bangladesh.. - Proceedings of the National Academy of Sciences. - Provinces and City in the Mekong Delta. - Male size and parental care in the sand goby, Pomatoschistus minutus. - Geographic expansion of the invasive mud sleeper Butis koilomatodon (Perciformes: Eleotridae) in the western Atlantic Ocean. - Journal of Fish Biology. - Pakistan Journal of Zoology. - 816 Vietnam Journal of Agricultural Sciences analysis of the oxudercine gobies (Gobiidae,. - Fishes of the World. - Morphometric and meristic variations of Glossogobius sparsipapillus along the coastline in the Mekong Delta, Vietnam, International Journal of Zoology and Animal Biology.. - Fishes of the Cambodian Mekong.. - Occurrence of the non-native sleeper Butis koilomatodon (Bleeker, 1849) (Perciformes:. - Eleotridae) in the Amazon coastal zone, Brazil.. - ICES Journal of Marine Science. - Morphometric and meristic variation between stocks of Bluefish (Pomatomus saltatrix) in the Black, Marmara, Aegean and northeastern Mediterranean Seas
Xem thử không khả dụng, vui lòng xem tại trang nguồn hoặc xem
Tóm tắt