Integrated Ecosystem Assessments for Fisheries Management in the Yellow Sea, the East China Sea, and the East/Japan Sea

Lee, Sang-Heon; Youn, Seok-Hyun

doi:10.3390/jmse11040845

Cited by 1 publication

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“…This study investigated species of visually observed predator and prey (hydroids and fish eggs) as well as invisible prey (zooplankton) using COI metabarcoding. Diverse information on species composition and distributions and predator-prey relationships is necessary to understand the structure of ecosystems [31,32]. Predator-prey relationships are identified through direct observation in the wild or analysis of the stomach contents of collected specimens [33].…”

Section: Discussionmentioning

confidence: 99%

Ectopleura crocea (Cnidaria: Hydrozoa) Identified as a Predator of Pelagic Fish Eggs through Cytochrome c Oxidase I Metabarcoding

Choi,

Kim

2023

JMSE

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Fish eggs have a wide range of predators. However, observing these predators is challenging, as is identifying fish eggs based on morphological traits. In this study, we observed hydroids, which are sessile organisms, consuming pelagic fish eggs. We conducted cytochrome c oxidase I (COI) metabarcoding to identify both the predator and the prey species. Massive COI reads were de novo assembled and nine representative sequences were constructed. The predator, identified from the representative sequences and its morphological features, was determined as Ectopleura crocea. The fish eggs that had been preyed upon belonged to two species: Sillago japonica and Parajulis poecilepterus. Additionally, four arthropod species (Labidocera rotunda, Oithona similis, Paracalanus parvus, and Pseudevadne tergestina) were consumed, and their morphological traits could not be observed, due to digestion. COI metabarcoding was an effective tool for studying the feeding activity of these small predators.

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Section: Discussionmentioning

confidence: 99%