Effects of freezing on length and mass measurements of Atlantic cod Gadus morhua in the Baltic Sea

K. McQueen; M. Mion; A. Hilvarsson; M. Casini; Hans Jakob Olesen; Karin Hüssy; K. Radtke; U. Krumme

doi:10.1111/jfb.14171

Effects of freezing on length and mass measurements of Atlantic cod Gadus morhua in the Baltic Sea

K. McQueen^*, M. Mion, A. Hilvarsson, M. Casini, Hans Jakob Olesen, Karin Hüssy, K. Radtke, U. Krumme

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

161 Downloads (Orbit)

Abstract

An aggregated sample of 925 Atlantic cod Gadus morhua collected by four countries in different regions of the Baltic Sea during different seasons were measure (total length, L_T = 161–890 mm and weighed (mass, M = 45–6900 g) both before freezing and after defrosting. The cod were found to decrease significantly in both L_T and M following death and frozen storage. There was an average (± SD) change in L_T of –2.91% (± 0.05%) following freezing, independent of starting L_T. Total M changed by –2.65% (± 0.14%), independent of starting mass. Shrinkage of L_T and M did not differ significantly between 1 and 4 months frozen storage, though L_T shrinkage was significantly greater after 1 or 4 months in the freezer compared with after 5 days. There was significant variation in L_T and M shrinkage between regions of capture. A significant negative relationship between condition of cod and L_T or M change was also observed. Equations to back‐calculate fresh L_T and M from thawed L_T, M and standard length (L_S), gutted LT, gutted L_Tg and gutted mass (M_g) are provided.

Original language	English
Journal	Journal of Fish Biology
Volume	95
Issue number	6
Pages (from-to)	1486-1495
ISSN	0022-1112
DOIs	https://doi.org/10.1111/jfb.14171
Publication status	Published - 2019

Keywords

Baltic Sea
Cod
Freezing
Gadus morhua
Measurement bias
Shrinkage

Access to Document

10.1111/jfb.14171

FulltextAccepted author manuscript, 2.39 MB

OpenUrl availability

Full text

Cite this

@article{439676ccefc64fedb338c41541870a58,

title = "Effects of freezing on length and mass measurements of Atlantic cod Gadus morhua in the Baltic Sea",

abstract = "An aggregated sample of 925 Atlantic cod Gadus morhua collected by four countries in different regions of the Baltic Sea during different seasons were measure (total length, LT = 161–890 mm and weighed (mass, M = 45–6900 g) both before freezing and after defrosting. The cod were found to decrease significantly in both LT and M following death and frozen storage. There was an average (± SD) change in LT of –2.91% (± 0.05%) following freezing, independent of starting LT. Total M changed by –2.65% (± 0.14%), independent of starting mass. Shrinkage of LT and M did not differ significantly between 1 and 4 months frozen storage, though LT shrinkage was significantly greater after 1 or 4 months in the freezer compared with after 5 days. There was significant variation in LT and M shrinkage between regions of capture. A significant negative relationship between condition of cod and LT or M change was also observed. Equations to back‐calculate fresh LT and M from thawed LT, M and standard length (LS), gutted LT, gutted LTg and gutted mass (Mg) are provided.",

keywords = "Baltic Sea, Cod, Freezing, Gadus morhua, Measurement bias, Shrinkage",

author = "K. McQueen and M. Mion and A. Hilvarsson and M. Casini and Olesen, {Hans Jakob} and Karin H{\"u}ssy and K. Radtke and U. Krumme",

year = "2019",

doi = "10.1111/jfb.14171",

language = "English",

volume = "95",

pages = "1486--1495",

journal = "Journal of Fish Biology",

issn = "0022-1112",

publisher = "Wiley-Blackwell",

number = "6",

}

TY - JOUR

T1 - Effects of freezing on length and mass measurements of Atlantic cod Gadus morhua in the Baltic Sea

AU - McQueen, K.

AU - Mion, M.

AU - Hilvarsson, A.

AU - Casini, M.

AU - Olesen, Hans Jakob

AU - Hüssy, Karin

AU - Radtke, K.

AU - Krumme, U.

PY - 2019

Y1 - 2019

N2 - An aggregated sample of 925 Atlantic cod Gadus morhua collected by four countries in different regions of the Baltic Sea during different seasons were measure (total length, LT = 161–890 mm and weighed (mass, M = 45–6900 g) both before freezing and after defrosting. The cod were found to decrease significantly in both LT and M following death and frozen storage. There was an average (± SD) change in LT of –2.91% (± 0.05%) following freezing, independent of starting LT. Total M changed by –2.65% (± 0.14%), independent of starting mass. Shrinkage of LT and M did not differ significantly between 1 and 4 months frozen storage, though LT shrinkage was significantly greater after 1 or 4 months in the freezer compared with after 5 days. There was significant variation in LT and M shrinkage between regions of capture. A significant negative relationship between condition of cod and LT or M change was also observed. Equations to back‐calculate fresh LT and M from thawed LT, M and standard length (LS), gutted LT, gutted LTg and gutted mass (Mg) are provided.

AB - An aggregated sample of 925 Atlantic cod Gadus morhua collected by four countries in different regions of the Baltic Sea during different seasons were measure (total length, LT = 161–890 mm and weighed (mass, M = 45–6900 g) both before freezing and after defrosting. The cod were found to decrease significantly in both LT and M following death and frozen storage. There was an average (± SD) change in LT of –2.91% (± 0.05%) following freezing, independent of starting LT. Total M changed by –2.65% (± 0.14%), independent of starting mass. Shrinkage of LT and M did not differ significantly between 1 and 4 months frozen storage, though LT shrinkage was significantly greater after 1 or 4 months in the freezer compared with after 5 days. There was significant variation in LT and M shrinkage between regions of capture. A significant negative relationship between condition of cod and LT or M change was also observed. Equations to back‐calculate fresh LT and M from thawed LT, M and standard length (LS), gutted LT, gutted LTg and gutted mass (Mg) are provided.

KW - Baltic Sea

KW - Cod

KW - Freezing

KW - Gadus morhua

KW - Measurement bias

KW - Shrinkage

U2 - 10.1111/jfb.14171

DO - 10.1111/jfb.14171

M3 - Journal article

C2 - 31631337

SN - 0022-1112

VL - 95

SP - 1486

EP - 1495

JO - Journal of Fish Biology

JF - Journal of Fish Biology

IS - 6

ER -

Effects of freezing on length and mass measurements of Atlantic cod Gadus morhua in the Baltic Sea

Abstract

Keywords

Access to Document

OpenUrl availability

Fingerprint

Cite this