Characteristics of Ichthyoplankton Communities and Their Relationship With Environmental Factors Above the Ninety East Ridge, Eastern Indian Ocean

Frontiers in Marine Science

卷:8

Jing Zhang²  Liyan Zhang³  Ran Zhang⁴  Xing Miao⁴  Shigang Liu⁴  Jiali Xiang⁴  Puqing Song⁴  Rui Wang⁴  Longshan Lin⁴ 

[1] College of Marine Sciences, Shanghai Ocean University, Shanghai, China;

[2] Fisheries College, Jimei University, Xiamen, China;

[3] Fujian Institute of Oceanography, Xiamen, China;

[4] Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China;

关键词: ichthyoplankton;    species diversity;    molecular genetics;    DNA barcoding;    eastern Indian Ocean;   

DOI  :  10.3389/fmars.2021.764859

来源: DOAJ

【 摘 要 】

The Ninety East Ridge is a submarine north–south oriented volcanic ridge in the eastern Indian Ocean. Surface-layer ichthyoplankton collected in this area from September to October were identified by combined morphological and molecular (DNA barcoding) techniques, and their species composition, diversity, and abundance, and correlations with environmental variables were described. Collections comprised 109 larvae and 507 eggs, which were identified to 37 taxa in 7 orders, 20 families, and 27 genera, and were dominated by the order Perciformes and species Vinciguerria sp., Oxyporhamphus micropterus, and Decapterus macarellus. Species abundances at each station and of each species were relatively low, suggesting that this area or the time of sampling were not of major importance for fish spawning. Waters above Ninety East Ridge had lower species diversity but higher species richness than waters further offshore. A generalized additive model revealed that high abundance of ichthyoplanktonic taxa occurred in areas with low sea surface height and high sea surface salinity, temperature, and chlorophyll a concentration. Of these, sea surface height was most correlated with ichthyoplankton abundance. We provided baseline data on surface-dwelling ichthyoplankton communities in this area to aid in development of pelagic fishery resources in waters around the Ninety East Ridge.

【 授权许可】

Unknown