First reference on reproductive biology of Butis koilomatodon in Mekong Delta, Vietnam

Dinh, Quang Minh; Lam, Tran Thi Huyen; Nguyen, Ton Huu Duc; Nguyen, Thanh; Nguyen, Tien Thi Kieu; Nguyễn, Nam Thành

doi:10.1186/s40850-021-00072-y

Cited by 25 publications

(26 citation statements)

References 40 publications

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“…The vegetation at TVST is dominated by Sonneratia caseolaris and Avicennia marina , whereas A. marna and Bruguiera gymnorrhiza (L.) Savigny occurs predominantly at BLCM. The salinity in BLCM (23.2–23.5) was higher than that in TVST (10.4–12.3), whereas the reverse case was found for pH (pH is 7.8–7.9 in TVST and 7.6–7.7 in BLCM, respectively) ( Dinh et al, 2021a ).…”

Section: Methodsmentioning

confidence: 99%

Population biological traits of Periophthalmus chrysospilos Bleeker, 1853 in the Vietnamese Mekong Delta

Dinh

Nguyen

et al. 2022

PeerJ

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Periophthalmus chrysospilos is an amphibious fish living in mudflats from eastern India to Indonesia, including the Vietnamese Mekong Delta. Population biological traits play an important role in fishery assessment, but understanding is limited for this species. In total 1,031 specimens were caught in two regions covering four provinces, including the TVST (Duyen Hai, Tra Vinh and Tran De, Soc Trang) and BLCM (Dong Hai, Bac Lieu and Dam Doi, Ca Mau). Results found that the sex ratio was close to 1:1. The parameters of the von Bertalanffy in TVST were L∞ = 12.8 cm, K = 0.41 yr−1, t0 = −0.10 yr and in BLCM were 12.7 cm, 0.38 yr−1 and −0.08 yr, respectively. Although the growth coefficient (Φ′) in BLCM (1.79), was lower than that in TVST (1.83), the species shared a similar size at first capture (7.9 cm in TVST and 7.9 cm in BLCM). The species suffered from heavy pressure of fishing in TVST as fishing mortality in TVST (2.32 yr−1) was higher than that in BLCM (1.38 yr−1), leading to the higher total mortality (Z = 3.60 yr−1) in TVST compared to BLCM (Z = 2.59 yr−1). By contrast, the species showed similar natural mortality over both sites (1.20 yr−1 in TVST and 1.22 yr−1 in BLCM). The Periophthalmus chrysospilos population was reasonably exploited because E values (0.64 in TVST and 0.53 in BLCM) were lower than E10 (0.706 in BTTV and 0.705 in STBL). Nonetheless, to avoid the consequences of overfishing, some sustainable fisheries practices should be implemented, such as protecting mangrove forests, restricting fishing during the recruitment period, using appropriate fishing tools and increasing mesh size.

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Section: Methodsmentioning

confidence: 99%

Population biological traits of Periophthalmus chrysospilos Bleeker, 1853 in the Vietnamese Mekong Delta

Dinh

Nguyen

et al. 2022

PeerJ

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“…Conversely, precipitation measures varied significantly—a monthly average of 20 mm in the dry season and 400 mm in the wet season ( Le et al, 2006 ). The pH was 7.6–7.9 and varied with sites but not seasons, whereas the salinity was 12.3–23.5% and varied with season but not site ( Dinh et al, 2021b ).…”

Section: Methodsmentioning

confidence: 99%

“…At DDCM, Avicennia marina and Bruguiera gymnorrhiza (L.) Savigny. were equally dominant ( Dinh et al, 2021b ).…”

Section: Methodsmentioning

confidence: 99%

Foraging ecology of the amphibious mudskipper Periophthalmus chrysospilos (Gobiiformes: Gobiidae)

Dinh

Nguyen

Lam

et al. 2021

PeerJ

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The food composition and feeding ecology of fishes living in the intertidal zone play an essential role in understanding the energetic connectivity between terrestrial and aquatic systems. Periophthalmus chrysospilos is an amphibious fish species occurring in the intertidal zone, but data on its diet and foraging ecology is still poorly known. This study on Ps. chrysospilos was carried out from April 2020 to March 2021 at four sites within the Mekong Delta estuary to define the influence of spatio-temporal factors on the diet of this species. The diet composition and relative gut lengths (RGLs) of Ps. chrysospilos were analysed in relation to four parameters—sex, size, site, and season. A total of 1,031 individuals were collected, and their digestive tract lengths were used to calculate the RGL. The digestive tracts of only 546 individuals were with food items (approximately 1:1 of empty vs full digestive tract) and were subsequently used for further analyses. The ranges in total length and weight in both adult and juvenile individuals were 3.4–10.6 cm and 0.38–14.13 g, respectively. The RGL values varied with season, fish size and site, but was always lower than 1, indicating a predominantly carnivorous diet. The variability of food items found within the digestive tracts demonstrated its adaptability in pursuing prey items within the limits of the littoral zone, and its importance as a conduit of terrestrial-marine connectivity. This species is characterised as an opportunistic mesopredator feeding primarily on Acetes spp., Uca spp., Dolichoderus sp., and rarely on Polychaeta and Actinopterygii. Other items found within the digestive tract are Mollusca, and detritus. The diet composition of Ps. chrysospilos did not vary with season and size, but changed with sex and site parameters. Uca spp. contributed to the sexual variation in dietary component, whereas Mollusca, Uca spp., Dolichoderus sp. and detritus, were drivers for spatial variation in the dietary component. The research provides fundamental information on diet composition and feeding strategy, as well as contributes towards knowledge on foraging ecology and resource use by intertidal animal communities.

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“…Theo nghiên cứu của Dinh và nnk. [14], độ mặn có sự thay đổi và tăng dần từ TV đến ST, BL và CM với các giá trị lần lượt là 12,33; 14,00; 23,50 và 23,17‰.…”

Section: Thu Mẫu Và Phân Tích Mẫuunclassified

The Morphological Measurement Variations of Periophthalmus chrysospilos along the Coastline in the Mekong Delta

Hiếu¹,

Dinh²,

U³

et al. 2021

NST

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This study provided data on morphological variation in Periophthalmus chrysospilos. The study was carried out in four provinces from Tra Vinh to Soc Trang, Bac Lieu and Ca Mau. Fish samples were collected by hand-catching over 12 months from April 2020 to March 2021. Analysed results of a collection of 1,031 individuals (508 females and 523 males) showed that the total length (TL) and weight (W) of the female Periophthalmus chrysospilos were higher than that of the male, higher in the wet season than in the dry season and gradually increased from Tra Vinh to Ca Mau. Besides, the total length and weight of fish were also influenced by the interaction of season ´ site and gender ´ site. In addition, the morphological variation of this species such as eye diameter (ED), eye distance (DE), body height (BD), head length (HL) and taxonomic ratios such as HL/TL, BD/TL, ED/HL, DE/HL was gender, seasonal fluctuations and study sites. These morphological variations and ratios were also influenced by interactions season ´ site interactions. The findings contributed further information to fish identification and the ecological adaptation understanding of this species.

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First reference on reproductive biology of Butis koilomatodon in Mekong Delta, Vietnam

Cited by 25 publications

References 40 publications

Population biological traits of Periophthalmus chrysospilos Bleeker, 1853 in the Vietnamese Mekong Delta

Population biological traits of Periophthalmus chrysospilos Bleeker, 1853 in the Vietnamese Mekong Delta

Foraging ecology of the amphibious mudskipper Periophthalmus chrysospilos (Gobiiformes: Gobiidae)

The Morphological Measurement Variations of Periophthalmus chrysospilos along the Coastline in the Mekong Delta

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