Survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (Synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers
The importance of copepods as the diet for rearing early larvae of the green mandarin fish Synchiropus splendidus has been demonstrated in our previous studies, however in those studies, copepods were always co-fed with rotifers in the attempt to compensate for low copepod feeding density due to sub...
Published in: | Aquaculture |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Elsevier
2020
|
Subjects: | |
Online Access: | https://researchonline.jcu.edu.au/67304/1/mandarin%20paper%202%20-2020.pdf |
id |
ftjamescook:oai:researchonline.jcu.edu.au:67304 |
---|---|
record_format |
openpolar |
spelling |
ftjamescook:oai:researchonline.jcu.edu.au:67304 2024-02-11T10:09:30+01:00 Survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (Synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers Shao, Luchang Zeng, Chaoshu 2020 application/pdf https://researchonline.jcu.edu.au/67304/1/mandarin%20paper%202%20-2020.pdf unknown Elsevier https://doi.org/10.1016/j.aquaculture.2020.734958 https://researchonline.jcu.edu.au/67304/ https://researchonline.jcu.edu.au/67304/1/mandarin%20paper%202%20-2020.pdf Shao, Luchang, and Zeng, Chaoshu (2020) Survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (Synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers. Aquaculture, 520. 734958. restricted Article PeerReviewed 2020 ftjamescook https://doi.org/10.1016/j.aquaculture.2020.734958 2024-01-22T23:47:58Z The importance of copepods as the diet for rearing early larvae of the green mandarin fish Synchiropus splendidus has been demonstrated in our previous studies, however in those studies, copepods were always co-fed with rotifers in the attempt to compensate for low copepod feeding density due to substantially low copepod culture productivity as compared to rotifers. Hence to what extent the roles of rotifers played in the larval culture is unclear. In this study, survival and growth of newly hatched S. splendidus larvae were compared when they were fed copepods (Parvocalanus crassirostris) at different densities either alone or co-fed with ss-type rotifers (Brachionus rotundiformis) until 11 days post-hatching (DPH). It showed that co-feeding rotifers at all copepod densities tested (0.1, 0.5 and 1 copepod mL(-1)) did not produce clear beneficial effects, suggesting co-feeding rotifers is unnecessary for early larval rearing. A subsequent experiment compared larval ingestion rates on copepods and rotifers under diffident co-feeding conditions, the ingestion rates and electivity index calculated showed that copepods were always positively selected over the rotifers by all ages of larvae (4, 6, 8 and 10 DPH). Furthermore, analyzing larval feeding behavior sequence (i.e. targeting, attack, capture, rejection following capture, and ingestion) on the copepods and rotifers when the two prey were offered to larvae of different ages (6, 8, 10 and 12 DPH) at a same density (1 copepod +1 rotifer mL(-1)), it was clear larvae of all ages attacked copepods more frequently. Moreover, copepods were never observed being rejected after being captured by the larvae whereas rejection was common for rotifers. Interestingly, the ratios of attacking leading to successful capture were significantly higher on rotifers than on copepods by larvae of all ages. However, this was more than offset by substantial lower ratios of targeting leading to attacks and higher rejection ratios following capture (up to 60%) on rotifers, resulting in ... Article in Journal/Newspaper Copepods Rotifer James Cook University, Australia: ResearchOnline@JCU Aquaculture 520 734958 |
institution |
Open Polar |
collection |
James Cook University, Australia: ResearchOnline@JCU |
op_collection_id |
ftjamescook |
language |
unknown |
description |
The importance of copepods as the diet for rearing early larvae of the green mandarin fish Synchiropus splendidus has been demonstrated in our previous studies, however in those studies, copepods were always co-fed with rotifers in the attempt to compensate for low copepod feeding density due to substantially low copepod culture productivity as compared to rotifers. Hence to what extent the roles of rotifers played in the larval culture is unclear. In this study, survival and growth of newly hatched S. splendidus larvae were compared when they were fed copepods (Parvocalanus crassirostris) at different densities either alone or co-fed with ss-type rotifers (Brachionus rotundiformis) until 11 days post-hatching (DPH). It showed that co-feeding rotifers at all copepod densities tested (0.1, 0.5 and 1 copepod mL(-1)) did not produce clear beneficial effects, suggesting co-feeding rotifers is unnecessary for early larval rearing. A subsequent experiment compared larval ingestion rates on copepods and rotifers under diffident co-feeding conditions, the ingestion rates and electivity index calculated showed that copepods were always positively selected over the rotifers by all ages of larvae (4, 6, 8 and 10 DPH). Furthermore, analyzing larval feeding behavior sequence (i.e. targeting, attack, capture, rejection following capture, and ingestion) on the copepods and rotifers when the two prey were offered to larvae of different ages (6, 8, 10 and 12 DPH) at a same density (1 copepod +1 rotifer mL(-1)), it was clear larvae of all ages attacked copepods more frequently. Moreover, copepods were never observed being rejected after being captured by the larvae whereas rejection was common for rotifers. Interestingly, the ratios of attacking leading to successful capture were significantly higher on rotifers than on copepods by larvae of all ages. However, this was more than offset by substantial lower ratios of targeting leading to attacks and higher rejection ratios following capture (up to 60%) on rotifers, resulting in ... |
format |
Article in Journal/Newspaper |
author |
Shao, Luchang Zeng, Chaoshu |
spellingShingle |
Shao, Luchang Zeng, Chaoshu Survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (Synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers |
author_facet |
Shao, Luchang Zeng, Chaoshu |
author_sort |
Shao, Luchang |
title |
Survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (Synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers |
title_short |
Survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (Synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers |
title_full |
Survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (Synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers |
title_fullStr |
Survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (Synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers |
title_full_unstemmed |
Survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (Synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers |
title_sort |
survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://researchonline.jcu.edu.au/67304/1/mandarin%20paper%202%20-2020.pdf |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_relation |
https://doi.org/10.1016/j.aquaculture.2020.734958 https://researchonline.jcu.edu.au/67304/ https://researchonline.jcu.edu.au/67304/1/mandarin%20paper%202%20-2020.pdf Shao, Luchang, and Zeng, Chaoshu (2020) Survival, growth, ingestion rate and foraging behavior of larval green mandarin fish (Synchiropus splendidus) fed copepods only versus co-fed copepods with rotifers. Aquaculture, 520. 734958. |
op_rights |
restricted |
op_doi |
https://doi.org/10.1016/j.aquaculture.2020.734958 |
container_title |
Aquaculture |
container_volume |
520 |
container_start_page |
734958 |
_version_ |
1790609421818134528 |