Fine-scale variability in otolith chemistry: Application to the life history analysis of Pacific cod (Gadus macrocephalus) in the Yellow Sea

2021 ◽  
pp. 107392
Author(s):  
Rui Wu ◽  
Jianchao Li ◽  
Chi Zhang ◽  
Xindong Pan ◽  
Tao Jiang ◽  
...  
Keyword(s):  
Life History ◽  
Yellow Sea ◽  
The Yellow Sea ◽  
Otolith Chemistry ◽  
Fine Scale ◽  
Pacific Cod ◽  
Pacific Cod Gadus Macrocephalus ◽  
Gadus Macrocephalus ◽  
History Analysis

Lack of Genetic Stock Discretion in Pacific Cod (Gadus macrocephalus)

1987 ◽  
Vol 44 (3) ◽  
pp. 490-498 ◽  
Author(s):  
W. Stewart Grant ◽  
Chang Ik Zhang ◽  
Tokimasa Kobayashi ◽  
Gunnar Ståhl
Keyword(s):  
Pacific Ocean ◽  
Bering Sea ◽  
Yellow Sea ◽  
North Pacific ◽  
Gene Diversity ◽  
North Pacific Ocean ◽  
The Yellow Sea ◽  
Pacific Cod ◽  
Pacific Cod Gadus Macrocephalus ◽  
Gadus Macrocephalus

We examined the ocean-wide genetic population structure of Pacific cod (Gadus macrocephalus) using electrophoretically detectable population markers at 41 protein loci. Samples were collected at 11 locations extending over most of the species's range from the Yellow Sea, Korea, to Puget Sound, Washington. Seven loci (17%) were polymorphic using the 0.05 criterion of polymorphism. Sample heterozygosities ranged from 0.018 to 0.041 and averaged 0.025 (±0.013). Two major genetic groups were detected: a western North Pacific Ocean (Asian) group and an eastern North Pacific group (including Bering Sea stocks). The UPGMA Nei genetic distance, D, (based on 41 loci) between samples from these two groups was 0.025, and this subdivision accounted for 18.9% of the total gene diversity. Genetic differentiation between these two groups appears to reflect the barrier effects of coastal Pleistocene glaciation. Morphological and tagging data from other studies suggest that Pacific cod are subdivided into several independent stocks. In this study, significant allele-frequency differences were detected between samples within the eastern North Pacific Ocean, the Bering Sea, and the western North Pacific Ocean, but not between stocks on a larger geographic scale. The average Nei genetic distance (based on 41 loci) between samples was only 0.0007, and a gene diversity analysis indicated that within-region differences represented only 3.1% of the total gene diversity. There was a slightly greater amount of differentiation between the Yellow Sea and the Sea of Japan (D = 0.0041), which reflects geographic isolation of the Yellow Sea stock not found in other areas. From theoretical considerations, little genetic divergence between stocks of Pacific Cod is expected because random genetic drift in large population sizes is insignificant and because migration between areas prevents genetic differentiation.

Feeding Habits of Pacific cod (Gadus macrocephalus) in the West Coast of Yellow Sea of Korea

2019 ◽  
Vol 31 (2) ◽  
pp. 77-82
Author(s):  
Dong-Hyek Choi ◽  
Myoung-Ho Sohn ◽  
Maeng Jin Kim ◽  
Seung-Jong Lee
Keyword(s):  
West Coast ◽  
Yellow Sea ◽  
Feeding Habits ◽  
Pacific Cod ◽  
The West ◽  
Pacific Cod Gadus Macrocephalus ◽  
Gadus Macrocephalus

scholarly journals The effect of temporal changes in life-history traits on reproductive potential in an exploited population of Pacific cod, Gadus macrocephalus

2010 ◽  
Vol 67 (8) ◽  
pp. 1659-1666 ◽  
Author(s):  
Yoji Narimatsu ◽  
Yuji Ueda ◽  
Takehiro Okuda ◽  
Tsutomu Hattori ◽  
Kunihiro Fujiwara ◽  
...  
Keyword(s):  
Life History ◽  
Population Size ◽  
Egg Production ◽  
Life History Traits ◽  
Reproductive Potential ◽  
Temporal Changes ◽  
Pacific Cod ◽  
Pacific Cod Gadus Macrocephalus ◽  
Gadus Macrocephalus ◽  
Old Females

Abstract Narimatsu, Y., Ueda, Y., Okuda, T., Hattori, T., Fujiwara, K., and Ito, M. 2010. The effect of temporal changes in life-history traits on reproductive potential in an exploited population of Pacific cod, Gadus macrocephalus. – ICES Journal of Marine Science, 67: 1659–1666. The population size of Pacific cod (Gadus macrocephalus) in the northeastern Pacific has fluctuated at high levels during the past 10 years, despite heavy exploitation from the juvenile stage. Annual changes in growth, age, and standard length (SL) at maturity, potential fecundity (PF), and total egg production are evaluated in relation to the population fluctuations. Most 4-year-old females were mature, and the SL at which 50% of 3-year-old females matured fluctuated very little over the years. However, the proportion of mature 3-year-old females varied significantly among years. The values of PF-at-age also varied among years and were explained by a model containing SL, condition factor, and oocyte diameter. The population size was negatively correlated with the proportion of mature females and the PF of females 3 years old, so the range of total egg production was smaller than that of spawning-stock biomasses. Eggs were produced mainly by young adults (3 and 4 years of age). The age of adult females did not affect recruitment success. It is suggested that plasticity of life-history traits allowed for compensation of total egg production and that the compensation contributed to maintaining the abundance of a population consisting mainly of young fish.

scholarly journals IgE reactivity to Pacific cod (Gadus macrocephalus) fish allergens in dogs with canine atopic dermatitis

2019 ◽  
Vol 143 (2) ◽  
pp. AB67
Author(s):  
Ichiro Imanishi ◽  
Jumpei Uchiyama ◽  
Takako Matsuda ◽  
Keijiro Mizukami ◽  
Hidekatsu Shimakura ◽  
...  
Keyword(s):  
Atopic Dermatitis ◽  
Pacific Cod ◽  
Canine Atopic Dermatitis ◽  
Ige Reactivity ◽  
Pacific Cod Gadus Macrocephalus ◽  
Gadus Macrocephalus

scholarly journals Functional Calcium Binding Peptides from Pacific Cod (Gadus macrocephalus) Bone: Calcium Bioavailability Enhancing Activity and Anti-Osteoporosis Effects in the Ovariectomy-Induced Osteoporosis Rat Model

Nutrients ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1325 ◽  
Author(s):  
Kai Zhang ◽  
Bafang Li ◽  
Qianru Chen ◽  
Zhaohui Zhang ◽  
Xue Zhao ◽  
...  
Keyword(s):  
Serum Calcium ◽  
Rat Model ◽  
Calcium Binding ◽  
Calcium Absorption ◽  
Intestinal Calcium Absorption ◽  
Pacific Cod ◽  
Pacific Cod Gadus Macrocephalus ◽  
Calcium Bioavailability ◽  
Gadus Macrocephalus ◽  
Binding Peptides

Calcium binding peptides from Pacific cod (Gadus macrocephalus) bone have attracted attention due to their potential effects on bone health. In this study, calcium binding peptides (CBP) were prepared from Pacific cod bone by trypsin and neutral protease. Ultraviolet spectra, circular dichroism (CD), and Fourier transform infrared spectroscopy (FTIR) revealed that carboxyl and amino groups in CBP could bind to Ca2+, and form the peptide-calcium complex (CBP-Ca). Single-pass intestinal perfusion (SPIP) experiments indicated that the intestinal calcium absorption was significantly enhanced (p < 0.01) in CBP-Ca treated Wistar rats. The anti-osteoporosis activity of CBP-Ca was investigated in the ovariectomized (OVX) Wistar rat model. The administration of CBP-Ca significantly (p < 0.01) improved the calcium bioavailability, trabecular bone structure, bone biomechanical properties, bone mineral density, and bone mineralization degree. CBP-Ca notably (p < 0.01) increased serum calcium, however, it remarkably (p < 0.01) reduced the levels of osteocalcin (OCN), bone alkaline phosphatase (BALP), tartrate-resistant acid phosphatase isoform 5b (TRAP5b), and C-telopeptide of type I collagen (CTX-1) in serum. Results suggested that the cod bone derived CBP could bind with calcium, improve the intestinal calcium absorption, calcium bioavailability, and serum calcium, then reduce the bone turnover rate, and thus ameliorate osteoporosis.

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