Influence of swimming behavior of copepod nauplii on feeding of larval turbot (Scophthalmus maximus)

Eleonora Bruno, Jacob Kring Højgaard, Benni Winding Hansen, Peter Munk, Josianne Gatt Støttrup*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Feeding in larval fish is influenced by a range of factors and among these are the morphological and behavioral characteristics of their prey. We investigated the influence of the swimming behavior of two species of calanoid copepods, Acartia tonsa and Temora longicornis, on larval turbot feeding. The nauplii of these species represent two contrasting swimming behaviors: A. tonsa is a jump-sink type swimmer, while T. longicornis is a cruise swimming type. Three replicates of ten larvae aged 7 and 9 days post hatch (DPH) were observed feeding on one of the two copepod species using a 2-dimensional video setup. The results showed that the duration of aiming postures by turbot larvae was 2.3 times higher when turbot larvae approached T. longicornis as compared to A. tonsa nauplii, indicating that larvae can more easily position themselves, preparing for attack, when the prey is of the jump-sink type. The attack speed of turbot larvae feeding on A. tonsa nauplii decreased slightly from DPH 7 to DPH 9, whereas it increased when attacking T. longicornis nauplii. Capture success rate by turbot larvae feeding on A. tonsa was 58% and slightly higher, but not significantly different to capture success rate when feeding on T. longicornis (54%). We conclude that the differences between behavior and other characteristics of these prey species have only minor effect on larval fish feeding, suggesting that copepods species for live feed should be selected according to their ease to culture more than to their species-specific characteristics
Original languageEnglish
JournalAquaculture International
Volume26
Issue number1
Pages (from-to)225-236
ISSN0967-6120
DOIs
Publication statusPublished - 2018

Cite this

Bruno, Eleonora ; Højgaard, Jacob Kring ; Hansen, Benni Winding ; Munk, Peter ; Støttrup, Josianne Gatt. / Influence of swimming behavior of copepod nauplii on feeding of larval turbot (Scophthalmus maximus). In: Aquaculture International. 2018 ; Vol. 26, No. 1. pp. 225-236.
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title = "Influence of swimming behavior of copepod nauplii on feeding of larval turbot (Scophthalmus maximus)",
abstract = "Feeding in larval fish is influenced by a range of factors and among these are the morphological and behavioral characteristics of their prey. We investigated the influence of the swimming behavior of two species of calanoid copepods, Acartia tonsa and Temora longicornis, on larval turbot feeding. The nauplii of these species represent two contrasting swimming behaviors: A. tonsa is a jump-sink type swimmer, while T. longicornis is a cruise swimming type. Three replicates of ten larvae aged 7 and 9 days post hatch (DPH) were observed feeding on one of the two copepod species using a 2-dimensional video setup. The results showed that the duration of aiming postures by turbot larvae was 2.3 times higher when turbot larvae approached T. longicornis as compared to A. tonsa nauplii, indicating that larvae can more easily position themselves, preparing for attack, when the prey is of the jump-sink type. The attack speed of turbot larvae feeding on A. tonsa nauplii decreased slightly from DPH 7 to DPH 9, whereas it increased when attacking T. longicornis nauplii. Capture success rate by turbot larvae feeding on A. tonsa was 58{\%} and slightly higher, but not significantly different to capture success rate when feeding on T. longicornis (54{\%}). We conclude that the differences between behavior and other characteristics of these prey species have only minor effect on larval fish feeding, suggesting that copepods species for live feed should be selected according to their ease to culture more than to their species-specific characteristics",
author = "Eleonora Bruno and H{\o}jgaard, {Jacob Kring} and Hansen, {Benni Winding} and Peter Munk and St{\o}ttrup, {Josianne Gatt}",
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Influence of swimming behavior of copepod nauplii on feeding of larval turbot (Scophthalmus maximus). / Bruno, Eleonora; Højgaard, Jacob Kring; Hansen, Benni Winding; Munk, Peter; Støttrup, Josianne Gatt.

In: Aquaculture International, Vol. 26, No. 1, 2018, p. 225-236.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Influence of swimming behavior of copepod nauplii on feeding of larval turbot (Scophthalmus maximus)

AU - Bruno, Eleonora

AU - Højgaard, Jacob Kring

AU - Hansen, Benni Winding

AU - Munk, Peter

AU - Støttrup, Josianne Gatt

PY - 2018

Y1 - 2018

N2 - Feeding in larval fish is influenced by a range of factors and among these are the morphological and behavioral characteristics of their prey. We investigated the influence of the swimming behavior of two species of calanoid copepods, Acartia tonsa and Temora longicornis, on larval turbot feeding. The nauplii of these species represent two contrasting swimming behaviors: A. tonsa is a jump-sink type swimmer, while T. longicornis is a cruise swimming type. Three replicates of ten larvae aged 7 and 9 days post hatch (DPH) were observed feeding on one of the two copepod species using a 2-dimensional video setup. The results showed that the duration of aiming postures by turbot larvae was 2.3 times higher when turbot larvae approached T. longicornis as compared to A. tonsa nauplii, indicating that larvae can more easily position themselves, preparing for attack, when the prey is of the jump-sink type. The attack speed of turbot larvae feeding on A. tonsa nauplii decreased slightly from DPH 7 to DPH 9, whereas it increased when attacking T. longicornis nauplii. Capture success rate by turbot larvae feeding on A. tonsa was 58% and slightly higher, but not significantly different to capture success rate when feeding on T. longicornis (54%). We conclude that the differences between behavior and other characteristics of these prey species have only minor effect on larval fish feeding, suggesting that copepods species for live feed should be selected according to their ease to culture more than to their species-specific characteristics

AB - Feeding in larval fish is influenced by a range of factors and among these are the morphological and behavioral characteristics of their prey. We investigated the influence of the swimming behavior of two species of calanoid copepods, Acartia tonsa and Temora longicornis, on larval turbot feeding. The nauplii of these species represent two contrasting swimming behaviors: A. tonsa is a jump-sink type swimmer, while T. longicornis is a cruise swimming type. Three replicates of ten larvae aged 7 and 9 days post hatch (DPH) were observed feeding on one of the two copepod species using a 2-dimensional video setup. The results showed that the duration of aiming postures by turbot larvae was 2.3 times higher when turbot larvae approached T. longicornis as compared to A. tonsa nauplii, indicating that larvae can more easily position themselves, preparing for attack, when the prey is of the jump-sink type. The attack speed of turbot larvae feeding on A. tonsa nauplii decreased slightly from DPH 7 to DPH 9, whereas it increased when attacking T. longicornis nauplii. Capture success rate by turbot larvae feeding on A. tonsa was 58% and slightly higher, but not significantly different to capture success rate when feeding on T. longicornis (54%). We conclude that the differences between behavior and other characteristics of these prey species have only minor effect on larval fish feeding, suggesting that copepods species for live feed should be selected according to their ease to culture more than to their species-specific characteristics

U2 - 10.1007/s10499-017-0199-x

DO - 10.1007/s10499-017-0199-x

M3 - Journal article

VL - 26

SP - 225

EP - 236

JO - Aquaculture International

JF - Aquaculture International

SN - 0967-6120

IS - 1

ER -