Trophic ecology of Humboldt squid (Dosidicus gigas) in the oceanic waters off Ecuador: insight from isotopic signature analysis on beaks

2021 ◽  
pp. NULL
Author(s):  
Guan Yu Hu ◽  
Jian Hua Li ◽  
Bi Lin Liu ◽  
Na Liu ◽  
Xin Jun Chen
Keyword(s):  
Trophic Ecology ◽  
Isotopic Signature ◽  
Signature Analysis ◽  
Dosidicus Gigas ◽  
Humboldt Squid

scholarly journals Ancestors of domestic cats in Neolithic Central Europe: Isotopic evidence of a synanthropic diet

2020 ◽  
Vol 117 (30) ◽  
pp. 17710-17719 ◽  
Author(s):  
Magdalena Krajcarz ◽  
Maciej T. Krajcarz ◽  
Mateusz Baca ◽  
Chris Baumann ◽  
Wim Van Neer ◽  
...  
Keyword(s):  
Central Europe ◽  
Trophic Ecology ◽  
Niche Partitioning ◽  
Significant Proportion ◽  
Isotopic Signature ◽  
Ecological Niches ◽  
Agricultural Activity ◽  
Domestic Cats ◽  
Late Neolithic ◽  
Early Farmers

Cat remains from Poland dated to 4,200 to 2,300 y BCE are currently the earliest evidence for the migration of the Near Eastern cat (NE cat), the ancestor of domestic cats, into Central Europe. This early immigration preceded the known establishment of housecat populations in the region by around 3,000 y. One hypothesis assumed that NE cats followed the migration of early farmers as synanthropes. In this study, we analyze the stable isotopes in six samples of Late Neolithic NE cat bones and further 34 of the associated fauna, including the European wildcat. We approximate the diet and trophic ecology of Late Neolithic felids in a broad context of contemporary wild and domestic animals and humans. In addition, we compared the ecology of Late Neolithic NE cats with the earliest domestic cats known from the territory of Poland, dating to the Roman Period. Our results reveal that human agricultural activity during the Late Neolithic had already impacted the isotopic signature of rodents in the ecosystem. These synanthropic pests constituted a significant proportion of the NE cat’s diet. Our interpretation is that Late Neolithic NE cats were opportunistic synanthropes, most probably free-living individuals (i.e., not directly relying on a human food supply). We explore niche partitioning between studied NE cats and the contemporary native European wildcats. We find only minor differences between the isotopic ecology of both these taxa. We conclude that, after the appearance of the NE cat, both felid taxa shared the ecological niches.

scholarly journals Chromogenic behaviors of the Humboldt squid (Dosidicus gigas) studied in situ with an animal-borne video package

2015 ◽  
Vol 218 (2) ◽  
pp. 265-275 ◽  
Author(s):  
H. Rosen ◽  
W. Gilly ◽  
L. Bell ◽  
K. Abernathy ◽  
G. Marshall
Keyword(s):  
Dosidicus Gigas ◽  
Humboldt Squid

Locomotion and behavior of Humboldt squid, Dosidicus gigas, in relation to natural hypoxia in the Gulf of California, Mexico

2012 ◽  
Vol 215 (18) ◽  
pp. 3175-3190 ◽  
Author(s):  
W. F. Gilly ◽  
L. D. Zeidberg ◽  
J. A. T. Booth ◽  
J. S. Stewart ◽  
G. Marshall ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Dosidicus Gigas ◽  
Humboldt Squid ◽  
And Behavior

Fishery biology of the Humboldt squid, Dosidicus gigas, in the Eastern Pacific Ocean

2006 ◽  
Vol 79 (1-2) ◽  
pp. 13-15 ◽  
Author(s):  
Paul G. Rodhouse ◽  
Claire M. Waluda ◽  
Enrique Morales-Bojórquez ◽  
Agustín Hernández-Herrera
Keyword(s):  
Pacific Ocean ◽  
Eastern Pacific ◽  
Eastern Pacific Ocean ◽  
Dosidicus Gigas ◽  
Fishery Biology ◽  
Humboldt Squid
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