基于广义加性模型的天津近海鱼卵、仔稚鱼群落结构研究

2018、2019年的4—11月利用大型浮游生物网对天津近岸海域进行逐月调查,分析天津近岸海域鱼卵、仔稚鱼种类组成,优势种、群落结构变化,以及丰度分布与环境因子的关系.调查结果表明,2018年监测到鱼卵10种,隶属4目9科,仔稚鱼9种,隶属5目8科;2019年监测到鱼卵9种,隶属4目8科,仔稚鱼8种,隶属5目7科.20...

Community Structure of Eggs and Larvae off the Coast of Tianjin Based on Generalized Additive Model (GAM)

A monthly survey was conducted in Tianjin coastal waters from April to November in 2018 and 2019 by using large-scale plankton network,and the species composition,dominant species,community structure and abundance distribution of eggs and larvae were analyzed in Tianjin coastal waters.The results showed that 10 species of egg were detected in 2018,belonging to 4 orders and 9 families,9 species of larvae belonging to 5 orders and 8 families,and 9 species of egg in 2019,belonging to 4 orders and 8 families,and 8 species of larvae belonging to 5 orders and 7 families.There were 3 dominant species of egg in 2018 and 2019,the common dominant species were in Clupeidae;3 and 2 dominant species of larvae in 2018 and 2019,respectively,with the common dominant species of Thryssa kammilensis and Salanx ariakensis.The total average abundance of egg and larvae was 0.418 ind/m³ and 0.205 ind/m³ in 2018,and 0.961 ind/m³ and 0.240 ind/m³ in 2019.There was no significant difference in abundance of larvae between years,which was greatly affected by seasonal and spatial changes.The generalized additive model(GAM)analysis revealed that temperature,redox potential and pH were the main factors influencing on abundance of egg and larvae(P<0.001).The findings is expected to provide a systematic reference for the investigation of fishery resources to supplement the egg and larvae in the coastal waters of Tianjin.