Impact of squid predation on juvenile fish survival
Abstract Predation is a major source of mortality during the early life stages of marine fishes; however, few studies have demonstrated its impact—especially that of squid predation—on survival processes. Here, we examined the feeding habits and predation impacts of swordtip squid on a major prey fi...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-07-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-14389-2 |
| _version_ | 1828543794693275648 |
|---|---|
| author | Motomitsu Takahashi Tatsuya Sakamoto Chiyuki Sassa Mari Yoda |
| author_facet | Motomitsu Takahashi Tatsuya Sakamoto Chiyuki Sassa Mari Yoda |
| author_sort | Motomitsu Takahashi |
| collection | DOAJ |
| description | Abstract Predation is a major source of mortality during the early life stages of marine fishes; however, few studies have demonstrated its impact—especially that of squid predation—on survival processes. Here, we examined the feeding habits and predation impacts of swordtip squid on a major prey fish, juveniles of jack mackerel, in the East China Sea. Otoliths of the juveniles extracted from the squid stomach were used to reconstruct the age–length relationship and the growth trajectory of the consumed juveniles, and they were compared to those of juveniles collected with a net using a newly developed statistical framework. The juveniles consumed by squid had significantly shorter body lengths and smaller body sizes during the late larval and early juvenile stages than the netted juveniles, suggesting that smaller juveniles with slower growth rates have a higher probability to be selected. The body mass ratio of the predator squid to prey juveniles (predator–prey mass ratio, PPMR) ranged from 7 to 700, which was remarkably lower than the PPMR reported in various marine ecosystems based on analyses of fishes. Our findings demonstrate that squid predation can significantly impact the early life survival of fish and the trophodynamics in marine ecosystems. |
| first_indexed | 2024-12-12T02:20:05Z |
| format | Article |
| id | doaj.art-20cdfeaef93142a09dc584be8a742d00 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-12T02:20:05Z |
| publishDate | 2022-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-20cdfeaef93142a09dc584be8a742d002022-12-22T00:41:42ZengNature PortfolioScientific Reports2045-23222022-07-0112111310.1038/s41598-022-14389-2Impact of squid predation on juvenile fish survivalMotomitsu Takahashi0Tatsuya Sakamoto1Chiyuki Sassa2Mari Yoda3Fisheries Resources Institute, Japan Fisheries Research and Education AgencyFisheries Resources Institute, Japan Fisheries Research and Education AgencyFisheries Resources Institute, Japan Fisheries Research and Education AgencyFisheries Resources Institute, Japan Fisheries Research and Education AgencyAbstract Predation is a major source of mortality during the early life stages of marine fishes; however, few studies have demonstrated its impact—especially that of squid predation—on survival processes. Here, we examined the feeding habits and predation impacts of swordtip squid on a major prey fish, juveniles of jack mackerel, in the East China Sea. Otoliths of the juveniles extracted from the squid stomach were used to reconstruct the age–length relationship and the growth trajectory of the consumed juveniles, and they were compared to those of juveniles collected with a net using a newly developed statistical framework. The juveniles consumed by squid had significantly shorter body lengths and smaller body sizes during the late larval and early juvenile stages than the netted juveniles, suggesting that smaller juveniles with slower growth rates have a higher probability to be selected. The body mass ratio of the predator squid to prey juveniles (predator–prey mass ratio, PPMR) ranged from 7 to 700, which was remarkably lower than the PPMR reported in various marine ecosystems based on analyses of fishes. Our findings demonstrate that squid predation can significantly impact the early life survival of fish and the trophodynamics in marine ecosystems.https://doi.org/10.1038/s41598-022-14389-2 |
| spellingShingle | Motomitsu Takahashi Tatsuya Sakamoto Chiyuki Sassa Mari Yoda Impact of squid predation on juvenile fish survival Scientific Reports |
| title | Impact of squid predation on juvenile fish survival |
| title_full | Impact of squid predation on juvenile fish survival |
| title_fullStr | Impact of squid predation on juvenile fish survival |
| title_full_unstemmed | Impact of squid predation on juvenile fish survival |
| title_short | Impact of squid predation on juvenile fish survival |
| title_sort | impact of squid predation on juvenile fish survival |
| url | https://doi.org/10.1038/s41598-022-14389-2 |
| work_keys_str_mv | AT motomitsutakahashi impactofsquidpredationonjuvenilefishsurvival AT tatsuyasakamoto impactofsquidpredationonjuvenilefishsurvival AT chiyukisassa impactofsquidpredationonjuvenilefishsurvival AT mariyoda impactofsquidpredationonjuvenilefishsurvival |