Ecotype and geographical variation in carbon and nitrogen stable isotope values in western North Pacific killer whales ( Orcinus orca )

2020 ◽  
Vol 36 (3) ◽  
pp. 925-938
Author(s):  
Ekaterina A. Borisova ◽  
Olga A. Filatova ◽  
Ivan D. Fedutin ◽  
Alexei V. Tiunov ◽  
Olga V. Shpak ◽  
...  
Keyword(s):  
Stable Isotope ◽  
North Pacific ◽  
Western North Pacific ◽  
Geographical Variation ◽  
Orcinus Orca ◽  
Killer Whales ◽  
Nitrogen Stable Isotope ◽  
Carbon And Nitrogen

Large-scale habitat segregation of fish-eating and mammal-eating killer whales (Orcinus orca) in the western North Pacific

Polar Biology ◽  
2019 ◽  
Vol 42 (5) ◽  
pp. 931-941 ◽  
Author(s):  
Olga A. Filatova ◽  
Olga V. Shpak ◽  
Tatiana V. Ivkovich ◽  
Evgeniia V. Volkova ◽  
Ivan D. Fedutin ◽  
...  
Keyword(s):  
North Pacific ◽  
Western North Pacific ◽  
Large Scale ◽  
Orcinus Orca ◽  
Habitat Segregation ◽  
Killer Whales

White Killer Whales (Orcinus orca) in the Western North Pacific

2016 ◽  
Vol 42 (3) ◽  
pp. 350-356
Author(s):  
Olga A. Filatova ◽  
Ivan D. Fedutin ◽  
Olga V. Titova ◽  
Brad Siviour ◽  
Alexandr M. Burdin ◽  
...  
Keyword(s):  
North Pacific ◽  
Western North Pacific ◽  
Orcinus Orca ◽  
Killer Whales

TRANSFER EFFICIENCY FROM PRIMARY PRODUCERS TO RUDITAPES PHILIPPINARUM ON AN INTERTIDAL FLAT IN HIROSHIMA BAY, JAPAN

2017 ◽  
Author(s):  
Sosuke Otani ◽  
Sosuke Otani ◽  
Akira Umehara ◽  
Akira Umehara ◽  
Haruka Miyagawa ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Secondary Production ◽  
Isotope Ratios ◽  
Ruditapes Philippinarum ◽  
Transfer Efficiency ◽  
Food Sources ◽  
Stable Isotope Ratios ◽  
Primary Producers ◽  
Nitrogen Stable Isotope ◽  
Carbon And Nitrogen

Fish yields of Ruditapes philippinarum have been decreased and the resources have not yet recovered. It needs to clarify food sources of R. philippinarum, and relationship between primary and secondary production of it. The purpose on this study is to reveal transfer efficiency from primary producers to R. philippinarum and food sources of R. philippinarum. The field investigation was carried out to quantify biomass of R. philippinarum and primary producers on intertidal sand flat at Zigozen beach in Hiroshima Bay, Japan. In particular, photosynthetic rates of primary producers such as Zostera marina, Ulva sp. and microphytobenthos were determined in laboratory experiments. The carbon and nitrogen stable isotope ratios for R. philippinarum and 8 potential food sources (microphytobenthos, MPOM etc) growing in the tidal flat were also measured. In summer 2015, the primary productions of Z. marina, Ulva sp. and microphytobenthos were estimated to be 70.4 kgC/day, 43.4 kgC/day and 2.2 kgC/day, respectively. Secondary production of R. philippinarum was 0.4 kgC/day. Contribution of microphytobenthos to R. philippinarum as food source was 56-76% on the basis of those carbon and nitrogen stable isotope ratios. Transfer efficiency from microphytobenthos to R. philippinarum was estimated to be 10-14%. It was suggested that microphytobenthos might sustain the high secondary production of R. philippinarum, though the primary production of microphytobenthos was about 1/10 compared to other algae.

scholarly journals Trophic Relationships and Habitat Preferences of Delphinids from the Southeastern Brazilian Coast Determined by Carbon and Nitrogen Stable Isotope Composition

PLoS ONE ◽  
2013 ◽  
Vol 8 (12) ◽  
pp. e82205 ◽  
Author(s):  
Tatiana Lemos Bisi ◽  
Paulo Renato Dorneles ◽  
José Lailson-Brito ◽  
Gilles Lepoint ◽  
Alexandre de Freitas Azevedo ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Composition ◽  
Habitat Preferences ◽  
Trophic Relationships ◽  
Brazilian Coast ◽  
Stable Isotope Composition ◽  
Nitrogen Stable Isotope ◽  
Carbon And Nitrogen

Carbon and nitrogen stable isotope signatures of deep-sea meiofauna follow oceanographical gradients across the Southern Ocean

2013 ◽  
Vol 110 ◽  
pp. 69-79 ◽  
Author(s):  
Gritta Veit-Köhler ◽  
Katja Guilini ◽  
Ilka Peeken ◽  
Petra Quillfeldt ◽  
Christoph Mayr
Keyword(s):  
Stable Isotope ◽  
Southern Ocean ◽  
Deep Sea ◽  
Nitrogen Stable Isotope ◽  
Carbon And Nitrogen ◽  
Stable Isotope Signatures

Alteration of the carbon and nitrogen stable isotope composition of beef by substitution of grass silage with maize silage

2005 ◽  
Vol 19 (14) ◽  
pp. 1937-1942 ◽  
Author(s):  
Bojlul Bahar ◽  
Frank J. Monahan ◽  
Aidan P. Moloney ◽  
Padraig O'Kiely ◽  
Charlie M. Scrimgeour ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Composition ◽  
Stable Isotope Composition ◽  
Maize Silage ◽  
Nitrogen Stable Isotope ◽  
Carbon And Nitrogen ◽  
Grass Silage
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