First feeding of larval herring

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The transition period from endogenous to exogenous feeding by larval herring was investigated in the laboratory for four herring stocks in order to evaluate the chances of survival at the time of fiest feeding. Observations on larval activity, feeding and growth were related to amount of yolk, visual experience with potential prey organisms prior to first feeding and prey density. Herring larvae did not initiate exogenous feeding until around the time of yolk resorption. The timing of first feeding was not influenced by prior exposure to potential prey organisms during the yolk sac stage. In the light of these observations, the ecological significance of the yolk sac stage is discussed. Initiation of exogenous feeding was delayed by 1-4 days at a low (7.5 nauplii .cntdot. l-1) compared to a high (120 nauplii .cntdot. l-1) prey density, but even at prey densities corresponding to the lower end of the range experienced by larvae in the sea, larvae were able to initiate exogenous feeding. There is thus no need to postulate extraordinarily high densities of food in larval nursery areas in order for the larvae to initiate exogenous feeding and the present observations do not support the comprehension that the time of yolk resorption is a particularly 'critical period' for larval herring survival.
Original languageEnglish
JournalDana
Volume5
Pages (from-to)95-107
ISSN0106-553X
Publication statusPublished - 1985

Cite this

@article{80b87304072147e084575b58a84be089,
title = "First feeding of larval herring",
abstract = "The transition period from endogenous to exogenous feeding by larval herring was investigated in the laboratory for four herring stocks in order to evaluate the chances of survival at the time of fiest feeding. Observations on larval activity, feeding and growth were related to amount of yolk, visual experience with potential prey organisms prior to first feeding and prey density. Herring larvae did not initiate exogenous feeding until around the time of yolk resorption. The timing of first feeding was not influenced by prior exposure to potential prey organisms during the yolk sac stage. In the light of these observations, the ecological significance of the yolk sac stage is discussed. Initiation of exogenous feeding was delayed by 1-4 days at a low (7.5 nauplii .cntdot. l-1) compared to a high (120 nauplii .cntdot. l-1) prey density, but even at prey densities corresponding to the lower end of the range experienced by larvae in the sea, larvae were able to initiate exogenous feeding. There is thus no need to postulate extraordinarily high densities of food in larval nursery areas in order for the larvae to initiate exogenous feeding and the present observations do not support the comprehension that the time of yolk resorption is a particularly 'critical period' for larval herring survival.",
author = "Thomas Ki{\o}rboe and Peter Munk and Josianne St{\o}ttrup",
year = "1985",
language = "English",
volume = "5",
pages = "95--107",
journal = "Dana",
issn = "0106-553X",
publisher = "Olsen & Olsen",

}

First feeding of larval herring. / Kiørboe, Thomas; Munk, Peter; Støttrup, Josianne.

In: Dana, Vol. 5, 1985, p. 95-107.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - First feeding of larval herring

AU - Kiørboe, Thomas

AU - Munk, Peter

AU - Støttrup, Josianne

PY - 1985

Y1 - 1985

N2 - The transition period from endogenous to exogenous feeding by larval herring was investigated in the laboratory for four herring stocks in order to evaluate the chances of survival at the time of fiest feeding. Observations on larval activity, feeding and growth were related to amount of yolk, visual experience with potential prey organisms prior to first feeding and prey density. Herring larvae did not initiate exogenous feeding until around the time of yolk resorption. The timing of first feeding was not influenced by prior exposure to potential prey organisms during the yolk sac stage. In the light of these observations, the ecological significance of the yolk sac stage is discussed. Initiation of exogenous feeding was delayed by 1-4 days at a low (7.5 nauplii .cntdot. l-1) compared to a high (120 nauplii .cntdot. l-1) prey density, but even at prey densities corresponding to the lower end of the range experienced by larvae in the sea, larvae were able to initiate exogenous feeding. There is thus no need to postulate extraordinarily high densities of food in larval nursery areas in order for the larvae to initiate exogenous feeding and the present observations do not support the comprehension that the time of yolk resorption is a particularly 'critical period' for larval herring survival.

AB - The transition period from endogenous to exogenous feeding by larval herring was investigated in the laboratory for four herring stocks in order to evaluate the chances of survival at the time of fiest feeding. Observations on larval activity, feeding and growth were related to amount of yolk, visual experience with potential prey organisms prior to first feeding and prey density. Herring larvae did not initiate exogenous feeding until around the time of yolk resorption. The timing of first feeding was not influenced by prior exposure to potential prey organisms during the yolk sac stage. In the light of these observations, the ecological significance of the yolk sac stage is discussed. Initiation of exogenous feeding was delayed by 1-4 days at a low (7.5 nauplii .cntdot. l-1) compared to a high (120 nauplii .cntdot. l-1) prey density, but even at prey densities corresponding to the lower end of the range experienced by larvae in the sea, larvae were able to initiate exogenous feeding. There is thus no need to postulate extraordinarily high densities of food in larval nursery areas in order for the larvae to initiate exogenous feeding and the present observations do not support the comprehension that the time of yolk resorption is a particularly 'critical period' for larval herring survival.

M3 - Journal article

VL - 5

SP - 95

EP - 107

JO - Dana

JF - Dana

SN - 0106-553X

ER -