Department of Biology, School of Education, Can Tho University, Can Tho, Vietnam.
Department of Molecular Biotechnology, Biotechnology Research and Development Institute, Can Tho University, Can Tho, Vietnam.
PeerJ. 2022 Mar 4;10:e13060. doi: 10.7717/peerj.13060. eCollection 2022.
Growth pattern and condition factor () are essential to fish resource assessment but limited to -an amphibious fish living in the mudflats along the Indo-Pacific regions, including the Mekong Delta (MD), Vietnam. This study lasted from April 2020 to March 2021 to verify if their growth pattern and change with sex, size, season, month and site. The total length and weight of 486 individuals (236 females and 250 males) were 2.9-5.9 cm and 0.13-1.66 g, respectively. The mudskipper displayed negative allometry as the slope value ( = 2.69 ± 0.06) obtained from length and weight () was significantly less than 3 ( < 0.01), indicating that most fish specimens were caught in the immature stage. The fish growth pattern did not change with sex as both males and females displayed negative allometry but varied by size since the mudskipper showed negative allometry in the immature group and isometry in the mature group. Likewise, growth type changed with season since fish showed negative allometry in the dry season but isometry in the wet season. As the slope value () varied by site and month, the mudskipper displayed spatiotemporal growth patterns, ranging from negative to positive allometry. The was impacted by sex as this value of females (1.09 ± 0.02) was higher than that of males (0.96 ± 0.01, < 0.01). Besides, was regulated by fish length since this value was higher in the mature group (1.12 ± 0.03) than in the immature group (1.01 ± 0.01, < 0.01). Likewise, was affected by season as this value was higher in the wet season (1.05 ± 0.02) than in the dry season (0.99 ± 0.01, < 0.01). Although the varied with site and month variables ( < 0.01), this value (1.02 ± 0.01) was generally higher than 1, showing fish adapted well to their habitat. The fish length at first capture should be increased to exploit this species sustainably.
生长模式和条件因子 () 是鱼类资源评估的重要指标，但受限于生活在印度洋-太平洋地区泥滩中的两栖鱼类——湄公河三角洲（MD）越南的弹涂鱼。本研究从 2020 年 4 月至 2021 年 3 月进行，旨在验证其生长模式是否随性别、大小、季节、月份和地点而变化。共采集了 486 尾个体（236 雌，250 雄）的全长和体重分别为 2.9-5.9cm 和 0.13-1.66g。弹涂鱼表现出负异速生长，其体长和体重（）的斜率值（=2.69±0.06）显著小于 3（<0.01），表明大多数鱼样本处于未成熟阶段。鱼类的生长模式不因性别而异，因为雌雄鱼都表现出负异速生长，但因大小而异，因为弹涂鱼在未成熟组中表现出负异速生长，在成熟组中表现出等速生长。同样，由于季节的不同，生长类型也会发生变化，因为在旱季鱼表现出负异速生长，而在雨季则表现出等速生长。由于地点和月份的不同，（）值变化，弹涂鱼表现出时空生长模式，范围从负异速生长到正异速生长。受性别影响，因为雌鱼的（1.09±0.02）高于雄鱼（0.96±0.01，<0.01）。此外，还受鱼体长的影响，因为成熟组（1.12±0.03）高于未成熟组（1.01±0.01，<0.01）。同样，也受到季节的影响，因为雨季（1.05±0.02）高于旱季（0.99±0.01，<0.01）。尽管（）受地点和月份变量的影响（<0.01），但该值（1.02±0.01）通常高于 1，表明鱼类很好地适应了它们的栖息地。应该增加首次捕捞的鱼的长度，以可持续地开发利用该物种。
