Spatio-temporal variability in trophic ecology of jumbo squid (Dosidicus gigas) in the southeastern Pacific: Insights from isotopic signatures in beaks

Hu, Guanyu; Boenish, Robert; Gao, Chunxia; Bai, Li; Chen, Xinjun; Chen, Yong; Punt, André E.

doi:10.1016/j.fishres.2018.12.009

Cited by 12 publications

(9 citation statements)

References 47 publications

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“…δ 15 N values exhibit stepwise enrichment across trophic levels and can be used to identify trophic position (Post, 2002). Thus, integrating δ 13 C and δ 15 N values from muscle or other tissues (e.g., gladius or beak) of D. gigas can reflect complex dynamics of trophic relationships within food webs (Ruiz-Cooley et al, 2006;Espinoza et al, 2017) and also ontogenetic changes in diet and/or habitat (Ruiz-Cooley et al, 2010;Gong et al, 2018b;Hu et al, 2019). However, spatial variabilities in biogeochemical processes affect the baseline isotopic values which propagated up to D. gigas through feeding (Argüelles et al, 2012;Ruiz-Cooley and Gerrodette, 2012).…”

Section: Introductionmentioning

confidence: 99%

Trophic Niche and Diversity of a Pelagic Squid (Dosidicus gigas): A Comparative Study Using Stable Isotope, Fatty Acid, and Feeding Apparatuses Morphology

Gong

Chen

et al. 2020

Front. Mar. Sci.

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Commercially important pelagic squid such as jumbo squid Dosidicus gigas play a key role in energy and nutrient transfer in marine ecosystem. Geographic variations in the foraging strategy of D. gigas can provide valuable information on cephalopod trophic diversification and adaption to natural and anthropogenic impacts. Here, we used a novel combination of stable isotope (SI) and fatty acid (FA) analyses of muscle tissues and morphometric measurements of feeding apparatuses to evaluate spatial patterns of habitat and resource use of D. gigas collected from three main fishing grounds in the tropical and southern temperate Pacific Ocean. Results showed that the δ 13 C and δ 15 N values were different among geographic stocks within D. gigas, possibly because of site-specific dietary sources and isotopic baseline values. Spatial variabilities in FA profiles/biomarkers, combined with SI results, suggests two foraging patterns: utilization of resources mainly from oceanic food webs or from both neritic and oceanic food webs. This behavior likely promotes the site-specific trophic niche width, increases adaptation to inhabiting oceanographic conditions, and could be driven by differences in feeding apparatuses morphology, body size, and trophic position. These results emphasize the dietary flexibility of D. gigas and their important ecological roles in ecosystems as cross-biome trophic linkages. Trophic diversification of pelagic squid like D. gigas may have important implications for their population dynamics, ecological associations, and subsequent management.

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Section: Introductionmentioning

confidence: 99%

Trophic Niche and Diversity of a Pelagic Squid (Dosidicus gigas): A Comparative Study Using Stable Isotope, Fatty Acid, and Feeding Apparatuses Morphology

Gong

Chen

et al. 2020

Front. Mar. Sci.

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“…As the author mentioned before, this finding must be analyzed in future research because it is coincident with reports of the importance of cannibalism in D. gigas [77,78]. Another topic that must be included in future research is the analysis of segments along the beak, this will allow the comparison between stages and the inferences will result in the characterization of movements, feeding habits, and areas where squids inhabit, as it was performed in eye lenses [46] and gladii [38,79].…”

Section: Final Considerationsmentioning

confidence: 67%

“…For gladii, the myopsid squid D. gahi was included in the analysis to compare with other species. [32], Queirós et al [36], Trasviña-Carrillo et al [40], Ruiz-Cooley et al [47], Liu et al [34], Hu [33].…”

Section: Datamentioning

confidence: 99%

“…Prey species were organized in Myctophid fishes, other fishes, Euphausiids, Copepods, Amphipods, and other crustaceans. After the revision, the mean and SD of δ 13 C and δ 15 N values of prey were compilated (Table S2 & S3) [9,10,12,14,15,16,18,30,33,34,36,35,40,[47][48][49][50][51][52][53][54][55][56][57][58][59][60].…”

Section: Prey Groupsmentioning

confidence: 99%

“…The isotope analysis in squids has been performed using mantle muscle tissue [17,[29][30][31] beaks [32][33][34][35][36], gladii [37][38][39], statoliths [40], and eye lenses [41][42][43]. Each tissue allows the isotope analysis in a determinate time; two months approximately for muscle tissue, and life history for beaks, gladii, and eye lenses [29,41,44].…”

Section: Introductionmentioning

confidence: 99%

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Beaks And Gladii of Oegopsid Squids to Understand Their Trophic Ecology Around American Waters: A Review of The Stable Isotope Analysis

Rosas‐Luis

2022

EIMBO

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The trophic ecology of squids has been studied using traditional methods of stomach content identification, there are reports of the diet of species of the order Oegopsida that described the prey and consumption of these predators in oceanic waters. Recently, the trophic ecology studies have included the analysis of hard tissues and the δ 13 C and δ 15 N to identify changes in the contribution of prey to the diet of squids, and to describe the trophic niche and overlap probability between species. This review analyzed the bibliographic references that used beaks and gladii to understand the trophic ecology of squids that inhabit in the marine waters of America. Results demonstrate that the beak of 14 oegopsid squid families have been included in this kind of analysis. The most studied squid was the Ommastrephid Dosidicus gigas in the Pacific Ocean, but many squid families (13) were analyzed in the Atlantic Ocean. The gladius was included in the hard tissue analysis, and it was reported that in addition to beaks, they are useful to describe the habitat, use of prey for squids, and feeding changes through ontogeny. As squids are fast moving predators, the use of these tissues in the isotope analysis help researchers to identify hot spots in the ocean, because these areas are the main refuges for feeding and for the development of these populations. Sympatric species can be identified by using hard tissue and isotopic analysis, as these tissues recorded the use of habitat and feeding behavior.

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Feeding Strategies and Trophic Niche Divergence of Three Groups of Dosidicus gigas off Peru: Based on Stable Carbon and Nitrogen Isotopes and Morphology of Feeding Apparatuses

Zhao

Fang

et al. 2023

Mar Biotechnol

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Spatio-temporal variability in trophic ecology of jumbo squid (Dosidicus gigas) in the southeastern Pacific: Insights from isotopic signatures in beaks

Cited by 12 publications

References 47 publications

Trophic Niche and Diversity of a Pelagic Squid (Dosidicus gigas): A Comparative Study Using Stable Isotope, Fatty Acid, and Feeding Apparatuses Morphology

Trophic Niche and Diversity of a Pelagic Squid (Dosidicus gigas): A Comparative Study Using Stable Isotope, Fatty Acid, and Feeding Apparatuses Morphology

Beaks And Gladii of Oegopsid Squids to Understand Their Trophic Ecology Around American Waters: A Review of The Stable Isotope Analysis

Feeding Strategies and Trophic Niche Divergence of Three Groups of Dosidicus gigas off Peru: Based on Stable Carbon and Nitrogen Isotopes and Morphology of Feeding Apparatuses

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