The population characteristics and trophic status of herring in the pelagic layer of the northern Okhotsk Sea

Горбатенко, К. М.; Мельников, И. В.; Kiyashko, S. I.; Lazhentsev, A. Ye.; Асеева, Н. Л.

doi:10.1134/s106307401307002x

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…However, bivalves were found at only a few sites in the scECS. Thus, zooplankton collected at each site were more suitable to be selected as the baseline, as used in the Baltic Sea and the northern Okhotsk Sea (Gorbatenko et al, 2013;Lesutienė et al, 2014). We used the δ 15 N values of zooplankton with particle sizes greater than 505 µm from the study area as the trophic baseline (λ = 2), and assumed a trophic discrimination factor (δ 15 N) of 2.9 ± 0.3 (McCutchan et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Trophic Plasticity of Bombay Duck (Harpadon nehereus) in the South-Central East China Sea Based on Stable Isotope Evidence

et al. 2021

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High trophic plasticity is often invoked to explain the successful expansion of many aquatic species. Bombay duck (BD) outcompete other traditionally commercial fishes in the East China Sea (ECS) in recent years, displaying a continuous and sharp increase of catches, however, little is known whether the competition advantage of BD was related to its trophic plasticity. Using stable isotope analysis (SIA), we investigated the trophic ecology of BD in the south-central ECS in two periods. Significant differences in δ13C and δ15N values were found between sampling months and among body sizes. Modal (95% credibility limits) estimation showed that BD’s trophic position (TP) gradually increased from 3.56 (3.31–3.82) in G1 (120–150 mm for body size) to 4.09 (3.69–4.50) in G5 (241–270 mm) in November, and from 3.37 (2.92–3.88) in G2 (151–180 mm) to 3.66 (3.07–4.23) in G4 (211–240 mm) in April, respectively, suggesting obvious ontogenetic variation of δ15N and TP. More importantly, the TP of BD within the same body size showed wide amplitude, indicating BD possess high trophic plasticity, and can capture prey from low to high trophic levels. Further quantitative analysis based on the MixSIAR model showed that BD mainly fed on zooplankton and fish, but its feeding habit was characterized by the consumption of gradually reduced zooplankton and increased fish associated with increased body size. Interestingly, the fish’s contribution to BD showed obvious seasonal variation. It can be explained by varied food availability in ECS. Relatively low fish prey in April forced BD to adjust its diet, adding the ingestion of shrimps and cephalopods corresponding to temporal variations in food availability. The present study provides the evidence that high trophic plasticity exists in the feeding strategy of BD, which is reflected in the ability to adjust the feeding preference according to nutritional needs and food environmental changes; thus, it is competitively advantageous and may partly explain why BD is becoming the predominant species and displays an extensive distribution in the ECS.

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Section: Discussionmentioning

confidence: 99%

Trophic Plasticity of Bombay Duck (Harpadon nehereus) in the South-Central East China Sea Based on Stable Isotope Evidence

et al. 2021

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“…На основании литературных данных о популяционно-генетической структуре сельдей Охотского моря и результатов собственных исследований, можно полагать, что выявленная структурированность популяций сельдей может быть связана с общностью их происхождения, обмена генами, или же популяции сельди имеют параллельную изменчивость и сходную адаптацию к идентичным условиям среды. Gorbatenko K.M., Melnikov I.V., Kiyashko S.I., Lazhentsev A.Е., Aseeva N.L. 2013…”

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Productivity and biomass dynamics of pacific hering Clupea pallasii of Tauyskaya Bay in the population structure of the species in the Sea of Okhotsk

Yusupov¹,

Kashchenko²

2018

The researches of the aquatic biological resources of Kamchatka

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На основе собственных материалов и литературных данных исследованы динамика биомассы и формирование соматической продукции сельди Тауйской губы и других популяций вида Охотского моря и прилегающих акваторий. Установлено, что в зависимости от особенностей темпов весового роста и естественной убыли сельди, с возрастом между популяциями вида наблюдаются различия, выражающиеся в асимметрии параболических кривых динамики биомассы, характеризующих разную скорость ее нарастания и убыли. По этому показателю сельдь Тауйской губы близка к гижигинско-камчатской популяции и вместе с ней образует крупный кластер с сельдями Юго-Восточной Камчатки. Все они характеризуются сравнительно медленным нарастанием биомассы с возрастом и поздним наступлением кульминации биомассы. Напротив, географически близкая к тауйской сельди охотская популяция вида близка к сельди зал. Де Кастри. Обе они обнаруживают сходство с группировками сельди побережья Восточного Сахалина. По показателю удельной продукции (Р/В-коэффициент) сельдь Тауйской губы уступает гижигинско-камчатской и охотской популяциям вида, что может быть исторически обусловлено ее небольшим ареалом, ограниченным с востока и запада районами распространения этих крупных по численности популяций.

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The population characteristics and trophic status of herring in the pelagic layer of the northern Okhotsk Sea

Cited by 2 publications

References 7 publications

Trophic Plasticity of Bombay Duck (Harpadon nehereus) in the South-Central East China Sea Based on Stable Isotope Evidence

Trophic Plasticity of Bombay Duck (Harpadon nehereus) in the South-Central East China Sea Based on Stable Isotope Evidence

Productivity and biomass dynamics of pacific hering Clupea pallasii of Tauyskaya Bay in the population structure of the species in the Sea of Okhotsk

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