Chemical and Sensory Assessment of Nonspawning Capelin (Mallotus villosus) Subjected to Long Term Frozen Storage

1983 ◽  
Vol 48 (5) ◽  
pp. 1512-1515 ◽  
Author(s):  
J. R. BOTTA ◽  
J. T. LAUDER ◽  
A. P. DOWNEY ◽  
W. SAINT
Keyword(s):  
Frozen Storage ◽  
Mallotus Villosus ◽  
Sensory Assessment ◽  
Capelin Mallotus Villosus

Effect of Double Freezing and Subsequent Long-Term Refrozen Storage at −23 °C on the Quality of Inshore Male Capelin (Mallotus villosus)

1978 ◽  
Vol 35 (4) ◽  
pp. 452-456 ◽  
Author(s):  
J. R. Botta ◽  
D. H. Shaw
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Peroxide Value ◽  
Storage Time ◽  
Mallotus Villosus ◽  
Protein Nitrogen ◽  
Capelin Mallotus Villosus ◽  
Extractable Protein

Whole inshore male capelin (Mallotus villosus) were stored at −23 °C for 2 mo (C2), or 6 mo (C6) prior to thawing, beheading and eviscerating, and refreezing. Though the quality of the twice-frozen product was in both cases inferior to a once-frozen sample, it was still quite acceptable after 2 yr of refrozen storage. As expected, quality was superior in the C2 samples, but in both sets of samples taste deteriorated to a greater extent than texture. Chemical measurement of peroxide value indicated a possible development of rancidity that could not be detected by sensory analysis. Considerable lipid hydrolysis occurred, with the free fatty acids (FFA) at least doubling during storage; increases were greater in C6. In both experiments FFA production correlated with texture, taste, and with extractable protein nitrogen (EPN). Dimethylamine (DMA), trimethylamine (TMA), hypoxanthine, and EPN appeared to be good indicators of storage time and sensory quality. Key words: capelin, dimethylamine (DMA), extractable protein nitrogen (EPN), free fatty acids (FFA), hypoxanthine, peroxide value, refrozen storage, taste, texture, trimethylamine

scholarly journals Reproductive biology and embryonal development of pacific capelin Mallotus villosus catervarius from the Tauiskaya Bay (northern part of the Okhotsk Sea)

2016 ◽  
Vol 185 (2) ◽  
pp. 49-66
Author(s):  
Ravil R. Yusupov ◽  
Maria Yu. Santalova
Keyword(s):  
Reproductive Biology ◽  
Vascular System ◽  
Okhotsk Sea ◽  
Mallotus Villosus ◽  
Embryonal Development ◽  
The Pacific ◽  
Capelin Mallotus Villosus ◽  
First Time ◽  
Consequent Increase

Reproductive biology of embryogeny and early ontogenesis is considered for pacific capelin Mallotus villosus catervarius (Pennant) from the Tauiskaya Bay in the northern Okhotsk Sea on the data of long-term sampling. The stages of periblastic sinus and Kupffer’s vesicle are described for the first time for the genus Mallotus. Results of the study allow to assume development of the embryonic vascular system of respiration for the capelin embryo. Tendency to the pacific capelin fecundity increasing is observed in the last five decades conditioned by its abundance lowering and consequent increase of the older fish percentage.

Chemical and Sensory Changes in Round Inshore Male Capelin (Mallotus villosus) During Prolonged Storage for 24 Months at −23 °C

1977 ◽  
Vol 34 (2) ◽  
pp. 209-214 ◽  
Author(s):  
D. H. Shaw ◽  
J. R. Botta
Keyword(s):  
Frozen Storage ◽  
Prolonged Storage ◽  
Freezing And Thawing ◽  
Mallotus Villosus ◽  
Capelin Mallotus Villosus ◽  
Sensory Analyses ◽  
Sensory Changes ◽  
Major Chemical ◽  
Relationship Of ◽  
The Relationship

Male capelin (Mallotus villosus) from a spawning inshore stock were held whole in block frozen format −23 °C without the benefit of special protective treatments. The results indicated an exceptional storage life of the samples, with no development of oxidative rancidity as monitored by organoleptic analysis, although TBA data did indicate this possibility. For many variables, the major chemical and sensory changes appeared to occur as a result of freezing and thawing, rather than as a result of frozen storage; changes were fastest during the first 6 wk. Because of the high sensory scores, it was difficult to correlate most chemical tests and organoleptic changes, though the relationship of texture scores to EPN and FFA values was significant [Formula: see text]. Sensory analyses showed that, after 2 yr, the samples were still fully acceptable.

Chemical and Sensory Assessment of Roundnose Grenadier (Macrourus rupestris) Subjected to Long Term Frozen Storage

1982 ◽  
Vol 47 (5) ◽  
pp. 1670-1674 ◽  
Author(s):  
J. R. BOTTA ◽  
A. P. DOWNEY ◽  
J. T. LAUDER ◽  
M. O'NEILL
Keyword(s):  
Frozen Storage ◽  
Sensory Assessment

scholarly journals Early life growth is affecting timing of spawning in the semelparous Barents Sea capelin (Mallotus villosus)

2021 ◽  
pp. 102614
Author(s):  
Florian Berg ◽  
Samina Shirajee ◽  
Arild Folkvord ◽  
Jane Aanestad Godiksen ◽  
Georg Skaret ◽  
...  
Keyword(s):  
Early Life ◽  
Barents Sea ◽  
Mallotus Villosus ◽  
Capelin Mallotus Villosus ◽  
Timing Of Spawning

Evaluation of long-term frozen storage of plasma for measurement of high-density lipoprotein and its subfractions by precipitation

1990 ◽  
Vol 36 (5) ◽  
pp. 783-788 ◽  
Author(s):  
M N Nanjee ◽  
N E Miller
Keyword(s):  
High Density Lipoprotein ◽  
Liquid Nitrogen ◽  
Frozen Storage ◽  
Density Lipoprotein ◽  
High Density ◽  
Long Term Stability ◽  
Long Term Storage ◽  
Different Temperatures ◽  
Edta Plasma

Abstract The concentration of high-density lipoprotein cholesterol (HDL-C) in plasma is now established as an independent risk factor for coronary heart disease, but more data are needed on the relative risk-predictive powers of different HDL subclasses. For epidemiologic and clinical purposes, isolation of HDL from other lipoproteins and separation of its two major subclasses, HDL2 and HDL3, are performed most conveniently by precipitation. Although storage of plasma is commonly necessary, little information is available on the long-term stability of HDL subclasses at different temperatures. Therefore, we quantified HDL-C, HDL2-C, and HDL3-C by dual precipitation with heparin-MnCl2/15-kDa dextran sulfate (H-M/DS) in samples of EDTA-plasma from 93 healthy subjects, after storage for one to 433 days at -20 degrees C, at -70 degrees C, or in liquid nitrogen (-196 degrees C). Fourteen samples (15%) were stored for a year or longer. At -20 degrees C, HDL-C decreased by 4.8% per year and HDL3-C decreased by 6.9% per year (P = 0.002 for both variables) relative to results obtained with samples stored in liquid nitrogen; total cholesterol, HDL2-C, and triglyceride did not change significantly at this temperature. When stored at -70 degrees C, none of the lipids showed any change relative to results obtained with liquid nitrogen. Thus, long-term storage of EDTA-plasma at -20 degrees C is unsuitable for subsequent quantification of HDL-C and its subclasses by H-M/DS dual precipitation. Storage at -70 degrees C is preferable, and is as reliable as storage in liquid nitrogen.

Channel head dynamics: capelin (Mallotus villosus) aggregation in the tidally driven upwelling system of the Saguenay - St. Lawrence Marine Park's whale feeding ground

2002 ◽  
Vol 59 (2) ◽  
pp. 197-210 ◽  
Author(s):  
Yvan Simard ◽  
Diane Lavoie ◽  
François J Saucier
Keyword(s):  
Circulation Model ◽  
Feeding Strategies ◽  
Total Biomass ◽  
Balaenoptera Acutorostrata ◽  
Mallotus Villosus ◽  
Tidal Dynamics ◽  
Lawrence Estuary ◽  
Fin Whale ◽  
Capelin Mallotus Villosus ◽  
Tidally Driven

Capelin (Mallotus villosus) tridimensional distribution at the head of the Laurentian Channel in the St. Lawrence estuary was investigated using 38- and 120-kHz acoustic surveys in the summers of 1994, 1995, 1997, and 1998. The results are interpreted with the help of a high-resolution tridimensional tidal circulation model. Total biomasses were small (93–4583 t) and showed rapid fluctuations, whereas mesoscale distribution was more constant. Capelin tended to occupy the very end of the channel head, especially the slopes and shallows surrounding the basins. This pattern did not coincide with the krill distribution, but the two total biomass series were significantly correlated. Capelin tidal dynamics is characterized by herding of capelin against the channel head slopes by the starting flooding currents, followed by an upwelling over the sills and shallows during maximum flood currents, and a return to the channel by the surface outflow during ebb. Each side of the channel head has a distinct capelin retention tidal cycle involving passive advection, swimming, and the two-layer estuarine circulation. This capelin distribution and tidal dynamics closely match the local fin whale (Balaenoptera physalus) and minke whale (Balaenoptera acutorostrata) distributions observed from the whale-watching fleet and typical tidal feeding strategies at the channel head.

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