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1

Fernández-Álvarez, Fernando Á., Heather E. Braid, Chingis M. Nigmatullin, Kathrin S. R. Bolstad, Manuel Haimovici, Pilar Sánchez, Kurichithara K. Sajikumar, Nadakkal Ragesh, and Roger Villanueva. "Global biodiversity of the genus Ommastrephes (Ommastrephidae: Cephalopoda): an allopatric cryptic species complex." Zoological Journal of the Linnean Society 190, no. 2 (March 20, 2020): 460–82. http://dx.doi.org/10.1093/zoolinnean/zlaa014.

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Abstract Cryptic speciation among morphologically homogeneous species is a phenomenon increasingly reported in cosmopolitan marine invertebrates. This situation usually leads to the discovery of new species, each of which occupies a smaller fraction of the original distributional range. The resolution of the taxonomic status of species complexes is essential because species are used as the unit of action for conservation and natural resource management politics. Before the present study, Ommastrephes bartramii was considered a monotypic cosmopolitan species with a discontinuous distribution. Here, individuals from nearly its entire distributional range were evaluated with mitochondrial DNA (cytochrome c oxidase subunit I and 16S rRNA). Four distinct species were consistently identified using four molecular species delimitation methods. These results, in combination with morphological and metabolic information from the literature, were used to resurrect three formerly synonymized names (Ommastrephes brevimanus, Ommastrephes caroli and Ommastrephes cylindraceus) and to propose revised distributional ranges for each species. In addition, diagnostic characters from the molecular sequences were incorporated in the species description. At present, only one of the four newly recognized species (Ommastrephes bartramii) is commercially exploited by fisheries in the North Pacific, but it now appears that the distributional range of this species is far smaller than previously believed, which is an essential consideration for effective fisheries management.
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2

Yokawa, K. "Allozyme differentiation of sixteen species of ommastrephid squid (Mollusca, Cephalopoda)." Antarctic Science 6, no. 2 (June 1994): 201–4. http://dx.doi.org/10.1017/s0954102094000313.

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Allozyme differentiation was investigated at 23 putative enzyme coding loci in 16 ommastrephid squids to identify species and to assess genetic relationships. The species examined were Illex illecebrosus, I. coindetii, I. argentinus, Todaropsis eblanae, Todarodes sagittatus, T. angolensis, T. filippovae, T. pacificus pacificus, Nototodarus sloanii, N. gouldi, Martialia hyadesi, Ommastrephes bartramii, Sthenoteuthis pteropus, S. oualaniensis, Eucleoteuthis luminosa, and Dosidicus gigas. A dendrogram based on Nei's genetic distance between the species closely approximates to the latest systematics based on morphological characters, but the positions of M. hyadesi and T. eblanae were considerably distant from all other species. The results demonstrate the benefits of further biochemical analysis to an understanding of the systematics of the ommastrephid squids.
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3

Parry, M. "Feeding behavior of two ommastrephid squids Ommastrephes bartramii and Sthenoteuthis oualaniensis off Hawaii." Marine Ecology Progress Series 318 (August 3, 2006): 229–35. http://dx.doi.org/10.3354/meps318229.

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4

Parry, Matthew. "Trophic variation with length in two ommastrephid squids, Ommastrephes bartramii and Sthenoteuthis oualaniensis." Marine Biology 153, no. 3 (September 19, 2007): 249–56. http://dx.doi.org/10.1007/s00227-007-0800-3.

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5

Wang, Jintao, Xinjun Chen, Kisei Tanaka, Jie Cao, and Yong Chen. "Environmental influences on commercial oceanic ommastrephid squids: a stock assessment perspective." Scientia Marina 81, no. 1 (March 27, 2017): 37. http://dx.doi.org/10.3989/scimar.04497.25b.

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Ommastrephid squids are short-lived ecological opportunists and their recruitment is largely driven by the surrounding environment. While recent studies suggest that recruitment variability in several squid species can be partially explained by environmental variability derived from synoptic oceanographic data, assessment of ommastrephid stocks using environmental variability is rare. In thisstudy, we modified asurplus production model to incorporate environmental variability into the assessment of threeommastrephid squids (Ommastrephes bartramii in the northwest Pacific, Illex argentinus in the southwest Atlantic and Dosidicus gigas in the southwest Pacific). We assumed that the key environmental variables—suitable sea surface temperature on spawning grounds during the spawning seasons and feeding grounds during the feeding seasons—have effects on the carrying capacity and the instantaneous population growth rate, respectively, in the surplus production model. For each squid stock, the assessment model with environmental variability had the highest fitting accuracy and the lowest mean squared error and coefficient of variation, and the management reference points based on the optimal model were more precautionary. This study advances our understanding of the interactions between the environment and ommastrephid squid population dynamics and can therefore improve the management of these commercially valuable stocks with a short life cycle.
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6

Chen, Chih-Shin. "Abundance trends of two neon flying squid (Ommastrephes bartramii) stocks in the North Pacific." ICES Journal of Marine Science 67, no. 7 (June 17, 2010): 1336–45. http://dx.doi.org/10.1093/icesjms/fsq063.

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Abstract Chen, C-S. 2010. Abundance trends of two neon flying squid (Ommastrephes bartramii) stocks in the North Pacific. – ICES Journal of Marine Science, 67: 1336–1345. Two stocks of neon flying squid (Ommastrephes bartramii) have been identified in the North Pacific, with differing life-history traits and geographic distributions, one in the Northeast Pacific and the other in the Northwest Pacific, each with seasonal cohorts. Both stocks are targeted by commercial fishing fleets from China, Japan, and Taiwan. The variability in abundance for each stock has been studied independently, but a comparable analysis between the two stocks is lacking. The abundance trends for the two stocks were examined using catch data from the Taiwanese squid fishery between 1986 and 2006. A time-series of monthly catch per unit effort and three explanatory variables, sea surface temperature in the presumed hatching grounds, the Southern Oscillation Index, and the number of vessels, were analysed using dynamic factor analysis to quantify squid abundance. The optimal model contained one common trend and all three explanatory variables. The Northwest Pacific and Northeast Pacific stocks exhibited opposing trends in abundance, and the results suggest that large-scale environmental factors, rather than regional factors, are more critical in influencing the abundance of oceanic squid species.
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Chen, Xin Jun, Xiao Hu Zhao, and Yong Chen. "Influence of El Niño/La Niña on the western winter–spring cohort of neon flying squid (Ommastrephes bartramii) in the northwestern Pacific Ocean." ICES Journal of Marine Science 64, no. 6 (July 11, 2007): 1152–60. http://dx.doi.org/10.1093/icesjms/fsm103.

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Abstract Chen, X. J., Zhao, X. H., and Chen, Y. 2007. Influence of El Niño/La Niña on the western winter–spring cohort of neon flying squid (Ommastrephes bartramii) in the northwestern Pacific Ocean. – ICES Journal of Marine Science, 64: 1152–1160. Ommastrephes bartramii is an oceanic squid distributed widely in the North Pacific, and its western winter–spring cohort is the target of a traditional squid fishery. Commercial fisheries data from the Chinese mainland squid-jigging fleet for the period 1995–2004 were analysed with respect to environmental variables. Sea surface temperature anomalies (SSTA) in the Niño 3.4 region had the strongest negative correlation with the SSTA of feeding and spawning grounds of the squid, with a time-lag of three and eight months (p < 0.05), respectively. A La Niña event would result in a decrease in squid recruitment through variability in environmental conditions on the spawning grounds, whereas an El Niño event would lead to environmental conditions favourable to squid recruitment. El Niño/La Niña events also influenced squid distribution on the feeding grounds, resulting in a northward shift of the fishing grounds in La Niña years and a southward shift in El Niño years. A multiple linear regression equation was derived to describe the dependence of the squid abundance index on environmental variables.
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8

Alabia, Irene D., Sei-Ichi Saitoh, Hiromichi Igarashi, Yoichi Ishikawa, and Yutaka Imamura. "Spatial Habitat Shifts of Oceanic Cephalopod (Ommastrephes bartramii) in Oscillating Climate." Remote Sensing 12, no. 3 (February 5, 2020): 521. http://dx.doi.org/10.3390/rs12030521.

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Short- and long-term climate oscillations impact seascapes, and hence, marine ecosystem structure and dynamics. Here, we explored the spatio-temporal patterns of potential squid habitat in the western and central North Pacific across inter-decadal climate transitions, coincident with periods of persistent warming and cooling. Potential habitat distributions of Ommastrephes bartramii were derived from the outputs of multi-ensemble species distribution models, developed using the most influential environmental factors to squid distribution and occurrence data. Our analyses captured the underlying temporal trends in potential squid habitat in response to environmental changes transpiring at each climatic transition, regulated by phase shifts in Pacific decadal oscillation (PDO) from 1999–2013. The spatial differences in environmental conditions were apparent across transitions and presumably modulate the local changes in suitable squid habitat over time. Specifically, during a cold to warm PDO shift, decreases in the summer potential habitat (mean rate ± standard deviation: −0.04 ± 0.02 habitat suitability index (HSI)/yr) were observed along the southern edge of the subarctic frontal zone (162°E–172°W). Coincidentally, this area also exhibits a warming trend (mean temporal trend: 0.06 ± 0.21 °C/yr), accompanied with the prevalence of cold-core mesoscale eddies, west of the dateline (mean temporal trend in sea surface height: −0.19 ± 1.05 cm/yr). These conditions potentially generate less favorable foraging habitat for squid. However, a warm-to-cold PDO transition underpins a northward shift of suitable habitat and an eastward shift of regions exhibiting the highest rate of potential squid habitat loss (170–160°W; mean temporal trend: −0.05 ± 0.03 HSI/yr). Nonetheless, the emergence of the areas with increasingly suitable habitat regardless of climate transitions suggests the ecological importance of these regions as potential squid habitat hotspots and climatic refugia.
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9

Ding, Qi, Jie Cao, and Xinjun Chen. "Stock assessment of the western winter-spring cohort of Ommastrephes bartramii in the Northwest Pacific Ocean using a Bayesian hierarchical DeLury model based on daily natural mortality during 2005-2015." Scientia Marina 83, no. 2 (June 18, 2019): 155. http://dx.doi.org/10.3989/scimar.04783.10a.

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The purpose of this study was to evaluate the effect of the intensive commercial jigging fishery on the western winter-spring cohort of neon flying squid (Ommastrephes bartramii) in the Northwest Pacific Ocean and to estimate the exploitation status of this stock during the period 2005-2015. We applied a Bayesian hierarchical DeLury depletion model to the Chinese jigging fisheries data to estimate the stock abundance and catchability for each year, and sensitivity analysis on daily natural mortality (M) was conducted. The results indicated that M values had great impacts on the overall estimates of stock size. Initial annual population sizes varied from 66 to 662 million individuals with the M value of 0.003-0.01 per day during the study period. O. bartramii suffered from a certain degree of overexploitation in 2008. The proportional escapement values (M=0.003-0.01) were 8.94% to 19.82% in 2008, with an average of 13.74%, which may have led to a low abundance of O. bartramii and annual catch since 2009. As short-lived ecological opportunists, O. bartramii are extremely sensitive to changes in multi-scale environmental conditions, especially when anomalous environmental conditions occur, and significant between-year variations in the initial abundance resulted in O. bartramii suffering from a certain degree of overexploitation in 2010. Although the proportional escapement met the management target of 40% from 2011 to 2015, the stock size and annual catch still fluctuated at relatively low levels. Improved knowledge of the influences of environmental conditions on abundance of the western winter-spring cohort of neon flying squid can contribute to the sustainable management of this stock.
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10

Yu, Wei, Xinjun Chen, Yang Zhang, and Qian Yi. "Habitat suitability modelling revealing environmental-driven abundance variability and geographical distribution shift of winter–spring cohort of neon flying squid Ommastrephes bartramii in the northwest Pacific Ocean." ICES Journal of Marine Science 76, no. 6 (April 14, 2019): 1722–35. http://dx.doi.org/10.1093/icesjms/fsz051.

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Abstract To identify climate-related habitat changes and variations in abundance and distribution of Ommastrephes bartramii in the northwest Pacific Ocean, an habitat suitability index (HSI) model was developed in this study including sea surface temperature (SST), photosynthetically active radiation (PAR), and sea surface height anomaly (SSHA). The catch-per-unit-effort (CPUE) of O. bartramii gradually decreased between 2006 and 2015, and the latitudinal gravity centres (LATG) of the fishing effort shifted southward. Correlation analyses suggested that CPUE was positively related to SST, PAR, and the areas of suitable and optimal habitat, but negatively correlated with SSHA and the percentages of poor habitat. A significantly positive correlation was found between the LATG and the average latitude of the most preferred SST, PAR, and the average latitude of the area with an HSI between 0.9 and 1.0. From 2006 to 2015, the annual declined CPUE was highly consistent with the increase in areas of poor habitat and the reduction in areas of suitable and optimal habitats. The south-approaching LATG coincided with the southward migration pattern of the latitude of the HSI area in the range of 0.9–1.0. Moreover, compared to the El Niño events, the La Niña events, and normal climate condition yielded enlarged suitable habitat areas for O. bartramii, and the LATG moved further north.
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11

Watanabe, Hikaru, Tsunemi Kubodera, Taro Ichii, Mitsuo Sakai, Masatoshi Moku, and Masaki Seitou. "Diet and sexual maturation of the neon flying squid Ommastrephes bartramii during autumn and spring in the Kuroshio–Oyashio transition region." Journal of the Marine Biological Association of the United Kingdom 88, no. 2 (March 2008): 381–89. http://dx.doi.org/10.1017/s0025315408000635.

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Diet and sexual maturation were examined in the winter–spring cohort of the neon flying squid, Ommastrephes bartramii, during its southward migration through the Kuroshio–Oyashio transition region of the western North Pacific. The main prey items are micronektonic animals and small pelagic fish, which were abundantly distributed throughout the study area. Among the prey species, O. bartramii was dependent on the Japanese anchovy Engraulis japonicus, which also migrate from the northern to southern transition region during the winter, and the micronektonic squid Watasenia scintillans throughout the study period. Other common prey items were Gonatopsis borealis, Diaphus theta, and Ceratoscopelus warmingii from October to November or December, and Tarletonbeania taylori after December. These dietary changes can be explained by the difference in the seasonal north–south migration patterns of the predator and prey species. Male sexual maturation progressed throughout the season, and most individuals were fully mature in January. In contrast, most of the females were immature throughout the study period. The feeding strategy of the squid in relation to their seasonal north to south migration and sexual maturation was discussed.
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12

LEFKADITOU, E., P. PERISTERAKI, N. CHARTOSIA, and A. SALMAN. "Recent findings of Ommastrephes bartramii (Cephalopoda: Ommastrephidae) in the eastern Mediterranean and the implication on its range expansion." Mediterranean Marine Science 12, no. 2 (September 21, 2011): 413. http://dx.doi.org/10.12681/mms.41.

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The neon flying squid Ommastrephes bartramii is found circumglobally in subtropical, temperate waters and sustains important fisheries in the North Pacific, but it is rarely encountered in the Mediterranean Sea. During the last decade, and particularly since 2004, the frequency of its presence in the Aegean Sea and nearby regions has increased, raising a question about a change in the species distribution and abundance in this area. In this study, we reviewed the literature on O. bartramii findings in the Mediterranean Sea and present new data describing body and beak morphometry, diet and the maturity of specimens recently collected from the easternmost basins. According to data from the entire Mediterranean Sea, collected individuals reached 66 cm in mantle length (ML), wherein only females were larger than 32 cm in ML. An isometric growth in body weight (BW) was shown, whereas the lower beak rostral length (LRL) was allometrically positive in relation to the ML. Occasional catches by jigs during experimental cruises provided most of the individuals recorded in the period from 1982-1992. In contrast, the most recent records are primarily comprised of mature females collected on or near the shore in the eastern basin and of predominantly smaller individuals from the western basin caught by professional jigging fisheries. The distribution of the specimen recorded from the Aegean Sea indicates an association between the species distribution and the circulation of the warm Levantine Intermediate Water. The more frequent observations of moribund spawning females at the periphery of the Cretan Sea are indicative of a spawning ground at this area. The suspected recent increase of O. bartramii abundance in both the northeastern and northwestern basins might be due to the warming of upper sea layers, which has been observed since the mid-1980s and is considered to be the main factor driving the northward expansion of the warm-water species’ range within the Mediterranean Sea.
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ANDRADE, A. L. V., M. C. PINEDO, and A. S. BARRETO. "Gastrointestinal parasites and prey items from a mass stranding of false killer whales, Pseudorca crassidens, in Rio Grande do Sul, Southern Brazil." Revista Brasileira de Biologia 61, no. 1 (February 2001): 55–61. http://dx.doi.org/10.1590/s0034-71082001000100008.

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The gastrointestinal tract of 14 false killer whales, 6 males and 8 females, stranded in June 1995 in southern Brazil, with total standard lengths from 338 to 507 cm, were analysed for endoparasites and food items. A pregnant female had a male foetus of 77.5 cm. Parasites were found in all 14 false killer whales. The nematode Anisakis simplex (Rudolphi, 1809) was found in the stomach of 57% of the animals and the acanthocephalan Bolbosoma capitatum (Linstow, 1889) Porta, 1908 was present in the intestine of all specimens and showed densities up to 600 m-1. An unidentified cestode (Tethrabothridae) was found also in the intestines of 14% of the individuals. The high infections of B. capitatum and A. simplex were not directly related with the cause of death. In the stomachs of four females, beaks of at least eight specimens of the oceanic and epipelagic species Ommastrephes bartramii (Lesueur, 1821) were found, with mantle lengths ranging from 189.8 to 360.9 mm. The distribution of O. bartramii in the coast of Rio Grande do Sul is consistent with false killer whales feeding in continental shelf waters.
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SAITO, Hiroaki, and Satoru ISHIKAWA. "Characteristic of lipids and fatty acid compositions of the neon flying squid, Ommastrephes bartramii." Journal of Oleo Science 61, no. 10 (2012): 547–64. http://dx.doi.org/10.5650/jos.61.547.

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Vijai, Dharmamony, Mitsuo Sakai, and Yasunori Sakurai. "Embryonic and paralarval development following artificial fertilization in the neon flying squid Ommastrephes bartramii." Zoomorphology 134, no. 3 (April 14, 2015): 417–30. http://dx.doi.org/10.1007/s00435-015-0267-6.

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Tian, Siquan, Xinjun Chen, Yong Chen, Liuxiong Xu, and Xiaojie Dai. "Standardizing CPUE of Ommastrephes bartramii for Chinese squid-jigging fishery in Northwest Pacific Ocean." Chinese Journal of Oceanology and Limnology 27, no. 4 (November 2009): 729–39. http://dx.doi.org/10.1007/s00343-009-9199-7.

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Liao, Baochao, Qun Liu, Xiaohui Wang, Abdul Baset, Shamsheer Hyder Soomro, Aamir Mahmood Memon, Khadim Hussain Memon, and Muhsan Ali Kalhoro. "Application of a continuous time delay-difference model for the population dynamics of winter-spring cohort of neon flying squid (Ommastrephes bartramii, Lesueur 1821) in the North-west Pacific Ocean." Journal of the Marine Biological Association of the United Kingdom 96, no. 7 (November 23, 2015): 1527–34. http://dx.doi.org/10.1017/s0025315415001824.

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A continuous time delay-difference model (CD-DM) was applied to the Chinese neon flying squid (Ommastrephes bartramii) jigging fisheries data (2001–2004) in the north-west Pacific Ocean. The continuous time delay-difference model (CD-DM) was modified from the discrete-time delay-difference model (D-DM), in which recruitment, growth and mortality rates are treated as varying continuously over time. Some commercially important stocks, such as shrimp andO. bartramiwith recruitment, growth and mortality rates all varying continuously over time, may be better analysed by a continuous delay-difference model. We estimated the growth and recruitment ofO. bartramiion the basis of the CD-DM, and biological reference points (BRPs) and accuracy of estimates are discussed in this study. We obtained population sizes of 183.9–201.8 million squid during early September 2004. The status of the stock was not in a sustainable state at this time with the available data, which suggests that measures should be taken for the sustainable utilization of this stock. The ability to calculate reference points without need of a full age-structured data makes CD-DM an attractive option for data-poor fisheries. We provided an alternative method for assessingO. bartramiistock and bridged the gap between simple surplus production models and complex fully age-structured models.
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Vijai, Dharmamony, Mitsuo Sakai, Yoshihiko Kamei, and Yasunori Sakurai. "Spawning pattern of the neon flying squid Ommastrephes bartramii (Cephalopoda: Oegopsida) around the Hawaiian Islands." Scientia Marina 78, no. 4 (October 28, 2014): 511–19. http://dx.doi.org/10.3989/scimar.04112.27b.

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Kurosaka, Kohei, Hideyuki Yamashita, Michio Ogawa, Hiroshi Inada, and Takafumi Arimoto. "Tentacle-breakage mechanism for the neon flying squid Ommastrephes bartramii during the jigging capture process." Fisheries Research 121-122 (June 2012): 9–16. http://dx.doi.org/10.1016/j.fishres.2011.12.016.

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Vijai, D., M. Sakai, T. Wakabayashi, HK Yoo, Y. Kato, and Y. Sakurai. "Effects of temperature on embryonic development and paralarval behavior of the neon flying squid Ommastrephes bartramii." Marine Ecology Progress Series 529 (June 8, 2015): 145–58. http://dx.doi.org/10.3354/meps11286.

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WAKABAYASHI, TOSHIE, SHIRO WADA, YOUSUKE OCHI, TARO ICHII, and MITSUO SAKAI. "Genetic differentiation of the neon flying squid Ommastrephes bartramii between North Pacific and South Atlantic populations." NIPPON SUISAN GAKKAISHI 78, no. 2 (2012): 198–203. http://dx.doi.org/10.2331/suisan.78.198.

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KUROSAKA, KOHEI, TAKASHI YANAGIMOTO, TOSHIE WAKABAYASHI, YUYA SHIGENOBU, YOUSUKE OCHI, and HIROSHI INADA. "Population genetic structure of the neon flying squid Ommastrephes bartramii inferred from mitochondrial DNA sequence analysis." NIPPON SUISAN GAKKAISHI 78, no. 2 (2012): 212–19. http://dx.doi.org/10.2331/suisan.78.212.

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Bower, John R., and Taro Ichii. "The red flying squid (Ommastrephes bartramii): A review of recent research and the fishery in Japan." Fisheries Research 76, no. 1 (October 2005): 39–55. http://dx.doi.org/10.1016/j.fishres.2005.05.009.

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Yu, Wei, Xinjun Chen, and Lianwei Liu. "Synchronous Variations in Abundance and Distribution of Ommastrephes bartramii and Dosidicus gigas in the Pacific Ocean." Journal of Ocean University of China 20, no. 3 (January 21, 2021): 695–705. http://dx.doi.org/10.1007/s11802-021-4644-0.

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Wang, Jintao, Robert Boenish, and Xinjun Chen. "Optimal weighting in species habitat modeling: a case study from Ommastrephes bartramii in the Northwest Pacific Ocean." Canadian Journal of Fisheries and Aquatic Sciences 77, no. 4 (April 2020): 723–40. http://dx.doi.org/10.1139/cjfas-2019-0204.

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The weighting of environmental variables in habitat modelling is important, especially for species with a poorly understood distribution. Traditional weighting schemes, such as arithmetic or geometric mean, often cause “gradient” habitat distribution patterns. We develop a new methodology that determines optimal variable weighting via a structured sensitivity analysis approach. This method considers the full spectrum of weighting combinations and uses multiple model selection criteria to select the best fit. We use a Northwest Pacific neon flying squid (Ommastrephes bartramii) fishery dataset (1998–2012) to compare our best performance habitat suitability index (BEST-HIS) with the traditional fixed methods, as well as to the more recent machine learning approach: boosted regression tree. Approaches were evaluated based on differences in habitat metrics, such as continuity, magnitude, and ratio of estimated unfavourable/favourable habitat. The BEST-HSI model generally outperformed the other three methods, though habitat metrics notably differed depending on weighting schemes used. The BEST-HSI approach is an efficient exploratory tool to investigate empirical relationships between organism presence and the environment, particularly for species with little known life history or migration information.
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Watanabe, H., T. Kubodera, T. Ichii, and S. Kawahara. "Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific." Marine Ecology Progress Series 266 (2004): 173–84. http://dx.doi.org/10.3354/meps266173.

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YAMASHITA, HIDEYUKI, KOHEI KUROSAKA, YOUSUKE OCHI, and MICHIO OGAWA. "The effect of ship rocking on the dropout of neon flying squid Ommastrephes bartramii in jigging fishery." NIPPON SUISAN GAKKAISHI 74, no. 4 (2008): 697–99. http://dx.doi.org/10.2331/suisan.74.697.

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Yatsu, Akihiko, and Junta Mori. "Early growth of the autumn cohort of neon flying squid, Ommastrephes bartramii, in the North Pacific Ocean." Fisheries Research 45, no. 2 (March 2000): 189–94. http://dx.doi.org/10.1016/s0165-7836(99)00112-5.

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Chen, Xinjun, Huajie Lu, Bilin Liu, Yong Chen, Siliang Li, and Ma Jin. "Species identification of Ommastrephes bartramii, Dosidicus gigas, Sthenoteuthis oualaniensis and Illex argentinus (Ommastrephidae) using beak morphological variables." Scientia Marina 76, no. 3 (July 11, 2012): 473–81. http://dx.doi.org/10.3989/scimar.03408.05b.

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Будянский, М. В., С. В. Пранц, Е. В. Самко, and М. Ю. Улейский. "ВЫЯВЛЕНИЕ И ЛАГРАНЖЕВ АНАЛИЗ ОКЕАНОГРАФИЧЕСКИХ СТРУКТУР, ПЕРСПЕКТИВНЫХ ДЛЯ ПРОМЫСЛА КАЛЬМАРА БАРТРАМА (OMMASTREPHES BARTRAMII) В РАЙОНЕ ЮЖНЫХ КУРИЛ, "Океанология"." Океанология, no. 5 (2017): 720–30. http://dx.doi.org/10.7868/s0030157417050069.

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Franjević, Damjan, Daria Skaramuca, Vedran Katavić, Nives Rajević, and Boško Skaramuca. "Genetic Identification of a Rare Record of Ommastrephes Bartramii (Cephalopoda: Ommastrephidae) from the Eastern Adriatic Sea." Folia Biologica 63, no. 1 (February 27, 2015): 19–23. http://dx.doi.org/10.3409/fb63_1.19.

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Nishikawa, Haruka, Hiromichi Igarashi, Yoichi Ishikawa, Mitsuo Sakai, Yoshiki Kato, Masahito Ebina, Norihisa Usui, Masafumi Kamachi, and Toshiyuki Awaji. "Impact of paralarvae and juveniles feeding environment on the neon flying squid (Ommastrephes bartramii) winter-spring cohort stock." Fisheries Oceanography 23, no. 4 (April 11, 2014): 289–303. http://dx.doi.org/10.1111/fog.12064.

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Alabia, Irene D., Sei-Ichi Saitoh, Robinson Mugo, Hiromichi Igarashi, Yoichi Ishikawa, Norihisa Usui, Masafumi Kamachi, Toshiyuki Awaji, and Masaki Seito. "Seasonal potential fishing ground prediction of neon flying squid (Ommastrephes bartramii) in the western and central North Pacific." Fisheries Oceanography 24, no. 2 (February 27, 2015): 190–203. http://dx.doi.org/10.1111/fog.12102.

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Xinjun, Chen, Tian Siquan, and Guan Wenjian. "Variations of oceanic fronts and their influence on the fishing grounds of Ommastrephes bartramii in the Northwest Pacific." Acta Oceanologica Sinica 33, no. 4 (April 2014): 45–54. http://dx.doi.org/10.1007/s13131-014-0452-3.

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35

Yu, Wei, Xinjun Chen, Qian Yi, and Siquan Tian. "A review of interaction between neon flying squid (Ommastrephes bartramii) and oceanographic variability in the North Pacific Ocean." Journal of Ocean University of China 14, no. 4 (July 23, 2015): 739–48. http://dx.doi.org/10.1007/s11802-015-2562-8.

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36

Chancollon, Odile, Claire Pusineri, and Vincent Ridoux. "Food and feeding ecology of Northeast Atlantic swordfish (Xiphias gladius) off the Bay of Biscay." ICES Journal of Marine Science 63, no. 6 (January 1, 2006): 1075–85. http://dx.doi.org/10.1016/j.icesjms.2006.03.013.

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Abstract As part of a larger project on the feeding ecology of large pelagic predators off the Bay of Biscay, this study analyses the diet of the swordfish, Xiphias gladius. Stomachs were collected from 86 swordfish. The diet was analysed in terms of prey occurrence, relative abundance, reconstituted mass, and size distribution. It consisted mainly of fish, 40.5% by mass (%M) and cephalopods, 59.3%M; crustaceans, 0.2%M, were considered secondary prey. When considering only the fresh fraction to allow for differential digestion rates, these figures were 77.3%M, 22.7%M, and trace amounts, respectively. Lanternfish, including Notoscopelus kroeyeri and Symbolophorus veranyi, were abundant, but paralepidids, Atlantic pomfret (Brama brama), and the squid Todarodes sagittatus, Ommastrephes bartramii, and Gonatus steenstrupi, dominated the diet by mass. The overall prey size range was 11–1420 mm, but sizes of 60–360 mm accounted for 80% of the distribution by number and of 140–760 mm for 80% of the distribution by mass. Intraspecifically, larger swordfish ate larger prey as a result of a change in species composition of the diet. The swordfish appears to show feeding plasticity both between different areas and between animals in the same area.
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Fang, Zhou, Peiwu Han, Yan Wang, Yangyang Chen, and Xinjun Chen. "Interannual variability of body size and beak morphology of the squid Ommastrephes bartramii in the North Pacific Ocean in the context of climate change." Hydrobiologia 848, no. 6 (February 23, 2021): 1295–309. http://dx.doi.org/10.1007/s10750-021-04528-7.

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AbstractOceanic squids are typical species that sensitive to the environment change. Previous studies on oceanic squids mainly focus on its annually fluctuated abundance under the background of climate change. The changes of individual morphological sizes, including body and beak, have been observed in recent years. In this study, Ommastrephes bartramii, an important cephalopod species in North Pacific Ocean, has been selected to analyze the annual morphological changes of body and beak under different scales of climate events. Geometric morphometrics was used to analyze the shape variations of both upper beak and lower beak. The possible phenotypic plasticity of body and beak was also discussed in different aspects. Body size showed different variations among different climatic years. The size at the maturity stage in 2015 (El Niño year) was much smaller than that in other years for both sexes. The centroid size representing the beak size showed the significant difference between two types of Pacific Decadal Oscillation phases. The shapes of upper and lower beaks showed significant differences between small-scale climatic patterns in which El Niño or La Niña event occurred, displaying different growth patterns.
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Igarashi, Hiromichi, Sei-Ichi Saitoh, Yoichi Ishikawa, Masafumi Kamachi, Norihisa Usui, Mitsuo Sakai, and Yutaka Imamura. "Identifying potential habitat distribution of the neon flying squid (Ommastrephes bartramii ) off the eastern coast of Japan in winter." Fisheries Oceanography 27, no. 1 (September 25, 2017): 16–27. http://dx.doi.org/10.1111/fog.12230.

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Zhang, Kaiqiang, Rongbian Wei, and Ru Song. "Extraction of Cathepsin D-Like Protease from Neon Flying Squid (Ommastrephes bartramii) Viscera and Application in Antioxidant Hydrolysate Production." Biomolecules 9, no. 6 (June 12, 2019): 228. http://dx.doi.org/10.3390/biom9060228.

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A protease from neon flying squid (Ommastrephes bartramii) viscera (SVCE3(f)) was partially purified by isoelectric solubilization/precipitation combined with ultra-membrane filtration (ISP-UMF). Two protein bands of 45 and 27 KDa were determined by SDS-PAGE assay. The protease characteristic of the protein band of 45 KDa was confirmed using casein zymography analysis. The result of UPLC-ESI-MS/MS suggested that the band of 45 KDa could be a cathepsin D-like protease. This cathepsin D-like protease showed an optimum pH of 3.0 and optimum temperature of 60 °C when casein was used as s substrate. Furthermore, its protease activity was stable at 30–50 °C and under a pH range of 1.0–5.0, maintaining about 60% of its initial activity. SVCE3(f) can digest half-fin anchovy (Setipinna taty) to generate antioxidant hydrolysates (HAHp-SEs). The degree of hydrolysis (DH) of HAHp-SEs increased along with the hydrolysis time and reached stability after 60 min of digestion. HAHp-SEs(30) with relatively lower DH exhibited the highest DPPH radical scavenging activity as compared with other HAHp-SEs. However, a stronger hydroxyl radical scavenging activity and greater reducing power were observed for HAHp-SEs that underwent higher DH. Accordingly, the partially purified cathepsin D-like protease of neon flying squid viscera using ISP-UMF could have potential application in antioxidant hydrolysates production.
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Xu, Jie, Xinjun Chen, Yong Chen, Qi Ding, and Siquan Tian. "The effect of sea surface temperature increase on the potential habitat of Ommastrephes bartramii in the Northwest Pacific Ocean." Acta Oceanologica Sinica 35, no. 2 (February 2016): 109–16. http://dx.doi.org/10.1007/s13131-015-0782-9.

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Yu, Wei, Xinjun Chen, Qian Yi, Guoping Gao, and Yong Chen. "Impacts of climatic and marine environmental variations on the spatial distribution of Ommastrephes bartramii in the Northwest Pacific Ocean." Acta Oceanologica Sinica 35, no. 3 (March 2016): 108–16. http://dx.doi.org/10.1007/s13131-016-0821-1.

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Yu, Wei, Xinjun Chen, and Qian Yi. "Fishing ground distribution of neon flying squid (Ommastrephes bartramii) in relation to oceanographic conditions in the Northwest Pacific Ocean." Journal of Ocean University of China 16, no. 6 (November 8, 2017): 1157–66. http://dx.doi.org/10.1007/s11802-017-3354-0.

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Chen, Xinjun, Yong Chen, Siquan Tian, Bilin Liu, and Weiguo Qian. "An assessment of the west winter–spring cohort of neon flying squid (Ommastrephes bartramii) in the Northwest Pacific Ocean." Fisheries Research 92, no. 2-3 (August 2008): 221–30. http://dx.doi.org/10.1016/j.fishres.2008.01.011.

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Kato, Yoshiki, Mitsuo Sakai, Haruka Nishikawa, Hiromichi Igarashi, Yoichi Ishikawa, Dharmamony Vijai, Yasunori Sakurai, Toshie Wakabayshi, and Toshiyuki Awaji. "Stable isotope analysis of the gladius to investigate migration and trophic patterns of the neon flying squid (Ommastrephes bartramii)." Fisheries Research 173 (January 2016): 169–74. http://dx.doi.org/10.1016/j.fishres.2015.09.016.

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Feng, Yongjiu, Xinjun Chen, and Yan Liu. "The effects of changing spatial scales on spatial patterns of CPUE for Ommastrephes bartramii in the northwest Pacific Ocean." Fisheries Research 183 (November 2016): 1–12. http://dx.doi.org/10.1016/j.fishres.2016.05.006.

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Chen, Xinjun, Siquan Tian, Bilin Liu, and Yong Chen. "Modeling a habitat suitability index for the eastern fall cohort of Ommastrephes bartramii in the central North Pacific Ocean." Chinese Journal of Oceanology and Limnology 29, no. 3 (May 2011): 493–504. http://dx.doi.org/10.1007/s00343-011-0058-y.

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Chen, Xinjun, Zhou Fang, Bilin Liu, Jianghua Li, and Hang Su. "Stock identification of neon flying squid (Ommastrephes bartramii) in the North Pacific Ocean on the basis of beak and statolith morphology." Scientia Marina 78, no. 2 (June 12, 2014): 239–48. http://dx.doi.org/10.3989/scimar.03991.06a.

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CHEN, Xin-jun, Jin MA, Bi-lin LIU, Hua-jie LU, Si-liang LI, and Jie CAO. "Effects of sexual maturity and body size on statolith shape of Ommastrephes bartramii in the Northwest Pacific Ocean." JOURNAL OF FISHERIES OF CHINA 34, no. 6 (August 19, 2010): 748–54. http://dx.doi.org/10.3724/sp.j.1231.2010.06706.

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Chen, Chih-Shin, and Tai-Sheng Chiu. "Variations of life history parameters in two geographical groups of the neon flying squid, Ommastrephes bartramii, from the North Pacific." Fisheries Research 63, no. 3 (September 2003): 349–66. http://dx.doi.org/10.1016/s0165-7836(03)00101-2.

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Nishikawa, Haruka, Takahiro Toyoda, Shuhei Masuda, Yoichi Ishikawa, Yuji Sasaki, Hiromichi Igarashi, Mitsuo Sakai, Masaki Seito, and Toshiyuki Awaji. "Wind-induced stock variation of the neon flying squid (Ommastrephes bartramii) winter-spring cohort in the subtropical North Pacific Ocean." Fisheries Oceanography 24, no. 3 (May 2015): 229–41. http://dx.doi.org/10.1111/fog.12106.

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