A new large egg type from the marine live feed calanoid copepod Acartia tonsa (Dana) – Perspectives for selective breeding of designer feed for hatcheries

Stian Halsen Hammarvold, Ronnie N. Glud, Jan Ove Evjemo, Andreas Hagemann, Benni Winding Hansen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Mass cultivation ofmarine copepods as live feed requires predictable and uniform production of a standard product for the end users, the hatcheries. A previously undescribed large egg type, measuring a mean diameter of 106.5 μm, was characterized and compared to normal eggs (82.3 μm) from a continuous culture of Acartia tonsa. The large egg type was significantly larger than the normal eggs, and only 1 large out of approximately 100 000 normal-sized eggs was found.Mean egg densitieswas 1.34±0.16 g/cm3 and 1.20±0.07 g/cm3 for normal
and large eggs, respectively. The hypothesis that large eggs were dormant, as indicated from the relatively low hatching success of 60%, within 48 h, was rejected as no significant difference was found in egg volumespecific respiration rates or histological analysis of the chorion between the two egg types. The nauplii hatched from large eggs were correspondingly large, and the copepods remained large when developing into adulthood. The fact that copepods hatched from large eggs were fertile indicates no chromosomal abnormalities and suggests that this egg type represents the upper tail end of eggs in a classical normal distribution of size vs. frequency. The next generations' eggswere not as large as the ones they originated from suggesting that the rare large eggs
represent a maternal effect. The large size eggs do however pose an interesting selection potential for designing large species-specific live feed products in aquaculture.
OriginalsprogEngelsk
TidsskriftAquaculture
Vol/bind436
Sider (fra-til)114-120
ISSN0044-8486
StatusUdgivet - jan. 2015

Emneord

  • live feed
  • Acartia tonsa
  • copepod eggs
  • new large egg type
  • selective breeding

Citer dette

Halsen Hammarvold, Stian ; Glud, Ronnie N. ; Evjemo, Jan Ove ; Hagemann, Andreas ; Winding Hansen, Benni. / A new large egg type from the marine live feed calanoid copepod Acartia tonsa (Dana) – Perspectives for selective breeding of designer feed for hatcheries. I: Aquaculture. 2015 ; Bind 436. s. 114-120.
@article{d55e52b0373d4e348420dfa1de303fa5,
title = "A new large egg type from the marine live feed calanoid copepod Acartia tonsa (Dana) – Perspectives for selective breeding of designer feed for hatcheries",
abstract = "Mass cultivation ofmarine copepods as live feed requires predictable and uniform production of a standard product for the end users, the hatcheries. A previously undescribed large egg type, measuring a mean diameter of 106.5 μm, was characterized and compared to normal eggs (82.3 μm) from a continuous culture of Acartia tonsa. The large egg type was significantly larger than the normal eggs, and only 1 large out of approximately 100 000 normal-sized eggs was found.Mean egg densitieswas 1.34±0.16 g/cm3 and 1.20±0.07 g/cm3 for normaland large eggs, respectively. The hypothesis that large eggs were dormant, as indicated from the relatively low hatching success of 60{\%}, within 48 h, was rejected as no significant difference was found in egg volumespecific respiration rates or histological analysis of the chorion between the two egg types. The nauplii hatched from large eggs were correspondingly large, and the copepods remained large when developing into adulthood. The fact that copepods hatched from large eggs were fertile indicates no chromosomal abnormalities and suggests that this egg type represents the upper tail end of eggs in a classical normal distribution of size vs. frequency. The next generations' eggswere not as large as the ones they originated from suggesting that the rare large eggsrepresent a maternal effect. The large size eggs do however pose an interesting selection potential for designing large species-specific live feed products in aquaculture.",
keywords = "live feed, Acartia tonsa, copepod eggs, new large egg type, selective breeding",
author = "{Halsen Hammarvold}, Stian and Glud, {Ronnie N.} and Evjemo, {Jan Ove} and Andreas Hagemann and {Winding Hansen}, Benni",
year = "2015",
month = "1",
language = "English",
volume = "436",
pages = "114--120",
journal = "Aquaculture",
issn = "0044-8486",
publisher = "Elsevier",

}

A new large egg type from the marine live feed calanoid copepod Acartia tonsa (Dana) – Perspectives for selective breeding of designer feed for hatcheries. / Halsen Hammarvold, Stian ; Glud, Ronnie N.; Evjemo, Jan Ove; Hagemann, Andreas; Winding Hansen, Benni.

I: Aquaculture, Bind 436, 01.2015, s. 114-120.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - A new large egg type from the marine live feed calanoid copepod Acartia tonsa (Dana) – Perspectives for selective breeding of designer feed for hatcheries

AU - Halsen Hammarvold, Stian

AU - Glud, Ronnie N.

AU - Evjemo, Jan Ove

AU - Hagemann, Andreas

AU - Winding Hansen, Benni

PY - 2015/1

Y1 - 2015/1

N2 - Mass cultivation ofmarine copepods as live feed requires predictable and uniform production of a standard product for the end users, the hatcheries. A previously undescribed large egg type, measuring a mean diameter of 106.5 μm, was characterized and compared to normal eggs (82.3 μm) from a continuous culture of Acartia tonsa. The large egg type was significantly larger than the normal eggs, and only 1 large out of approximately 100 000 normal-sized eggs was found.Mean egg densitieswas 1.34±0.16 g/cm3 and 1.20±0.07 g/cm3 for normaland large eggs, respectively. The hypothesis that large eggs were dormant, as indicated from the relatively low hatching success of 60%, within 48 h, was rejected as no significant difference was found in egg volumespecific respiration rates or histological analysis of the chorion between the two egg types. The nauplii hatched from large eggs were correspondingly large, and the copepods remained large when developing into adulthood. The fact that copepods hatched from large eggs were fertile indicates no chromosomal abnormalities and suggests that this egg type represents the upper tail end of eggs in a classical normal distribution of size vs. frequency. The next generations' eggswere not as large as the ones they originated from suggesting that the rare large eggsrepresent a maternal effect. The large size eggs do however pose an interesting selection potential for designing large species-specific live feed products in aquaculture.

AB - Mass cultivation ofmarine copepods as live feed requires predictable and uniform production of a standard product for the end users, the hatcheries. A previously undescribed large egg type, measuring a mean diameter of 106.5 μm, was characterized and compared to normal eggs (82.3 μm) from a continuous culture of Acartia tonsa. The large egg type was significantly larger than the normal eggs, and only 1 large out of approximately 100 000 normal-sized eggs was found.Mean egg densitieswas 1.34±0.16 g/cm3 and 1.20±0.07 g/cm3 for normaland large eggs, respectively. The hypothesis that large eggs were dormant, as indicated from the relatively low hatching success of 60%, within 48 h, was rejected as no significant difference was found in egg volumespecific respiration rates or histological analysis of the chorion between the two egg types. The nauplii hatched from large eggs were correspondingly large, and the copepods remained large when developing into adulthood. The fact that copepods hatched from large eggs were fertile indicates no chromosomal abnormalities and suggests that this egg type represents the upper tail end of eggs in a classical normal distribution of size vs. frequency. The next generations' eggswere not as large as the ones they originated from suggesting that the rare large eggsrepresent a maternal effect. The large size eggs do however pose an interesting selection potential for designing large species-specific live feed products in aquaculture.

KW - live feed

KW - Acartia tonsa

KW - copepod eggs

KW - new large egg type

KW - selective breeding

M3 - Journal article

VL - 436

SP - 114

EP - 120

JO - Aquaculture

JF - Aquaculture

SN - 0044-8486

ER -