Cephalopods habitat and trophic ecology: historical data using snares penguin as biological sampler

Guímaro, Hugo; Thompson, David R.; Paiva, V. H.; Ceia, Filipe R.; Cunningham, Duncan M.; Moors, P. J.; Xavier, José C.

doi:10.1007/s00300-020-02776-2

Cited by 3 publications

(5 citation statements)

References 60 publications

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“…They have been used: 1) in ecological and biogeographical studies to determine the foraging habitat and the role of cephalopods in food webs (Ruiz-Cooley et al, 2006;Guerra et al, 2010;Golikov et al, 2018;Staudinger et al, 2019;Fang et al, 2021a), 2) in fisheries to study stocks' distribution, contributing also to the implementation of ecosystem-based management (Fang et al, 2016b;Queirós et al, 2019), and 3) to study impacts of climate change and environmental fluctuations in these organisms (Golikov et al, 2019a;Hu et al, 2019;Abreu et al, 2020). Furthermore, SIA on beaks can also be used to study the foraging ecology of their predators (Guerreiro et al, 2015;Abreu et al, 2019;Guímaro et al, 2021). SIA of the entire beak gives us an average value for the life of the individual, and when applied to different sections of the beak (using the methodology specifically applied for SIA analyses (Guerra et al, 2010;Queirós et al, 2018)), it enables the study of ontogenetic changes throughout the lifespan (Cherel and Hobson, 2005;Guerra et al, 2010;Queirós et al, 2018;Wang et al, 2022).…”

Section: Stable Isotopesmentioning

confidence: 99%

“…In this situation, a possible solution is to pool the minimum number of different beaks necessary to perform the analyses. However, it must be guaranteed that beaks belong to similar individuals (i.e., similar size, collected in the same location and at the same time) to ensure they belong to the same school/cohort (e.g., Guímaro et al, 2021;Queirós et al, 2021a). Interpretation of SIA results from cephalopod beaks (and other tissues) is dependent on baseline stable isotopic values (i.e., to determine the habitat and trophic level).…”

Section: Stable Isotopesmentioning

confidence: 99%

“…The amount of sample needed to perform some trace element analyses can also be a problem for both entire small beaks and/or beak sections. Here, as for SIA, pooling beaks with similar size, origin and time of sampling is a possible solution (Queirós et al, 2020a;Guímaro et al, 2021). These limitations also apply to the emerging compound-specific trace element analyses (Weiss et al, 2008;Wiederhold, 2015).…”

Section: Trace Elementsmentioning

confidence: 99%

“…Clarke and colleagues also developed the currently used terminology for different parts of the upper and lower beaks (Clarke, 1986) (Figure 1). Such initial efforts helped many other colleagues to develop beak identification guides (Imber, 1978;Pérez-Gándaras, 1983;Wolff, 1984;Kubodera and Furuhashi, 1987;Lu and Ickeringill, 2002;Xavier and Cherel, 2021;Pedà et al, 2022) and supported studies to understand the importance of cephalopods in the diet of different predator taxa (Clarke, 1996;Croxall and Prince, 1996;Klages, 1996;Smale, 1996;Cherel and Klages, 1998;Ménard et al, 2013;Abreu et al, 2019;Romanov et al, 2020;Queirós et al, 2021b;Cherel, 2021;Guímaro et al, 2021). This is particularly important as much information cannot be obtained by other means (e.g., scientific nets are too slow to catch faster cephalopods and catch far fewer species and narrower range of sampled sizes) (Clarke, 1977;Santos et al, 2001;Staudinger et al, 2013;Hoving et al, 2014;Cherel, 2020).…”

Section: Introductionmentioning

confidence: 98%

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The significance of cephalopod beaks as a research tool: An update

Xavier

Golikov²,

Queirós³

et al. 2022

Front. Physiol.

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The use of cephalopod beaks in ecological and population dynamics studies has allowed major advances of our knowledge on the role of cephalopods in marine ecosystems in the last 60 years. Since the 1960’s, with the pioneering research by Malcolm Clarke and colleagues, cephalopod beaks (also named jaws or mandibles) have been described to species level and their measurements have been shown to be related to cephalopod body size and mass, which permitted important information to be obtained on numerous biological and ecological aspects of cephalopods in marine ecosystems. In the last decade, a range of new techniques has been applied to cephalopod beaks, permitting new kinds of insight into cephalopod biology and ecology. The workshop on cephalopod beaks of the Cephalopod International Advisory Council Conference (Sesimbra, Portugal) in 2022 aimed to review the most recent scientific developments in this field and to identify future challenges, particularly in relation to taxonomy, age, growth, chemical composition (i.e., DNA, proteomics, stable isotopes, trace elements) and physical (i.e., structural) analyses. In terms of taxonomy, new techniques (e.g., 3D geometric morphometrics) for identifying cephalopods from their beaks are being developed with promising results, although the need for experts and reference collections of cephalopod beaks will continue. The use of beak microstructure for age and growth studies has been validated. Stable isotope analyses on beaks have proven to be an excellent technique to get valuable information on the ecology of cephalopods (namely habitat and trophic position). Trace element analyses is also possible using beaks, where concentrations are significantly lower than in other tissues (e.g., muscle, digestive gland, gills). Extracting DNA from beaks was only possible in one study so far. Protein analyses can also be made using cephalopod beaks. Future challenges in research using cephalopod beaks are also discussed.

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Section: Stable Isotopesmentioning

confidence: 99%

Section: Stable Isotopesmentioning

confidence: 99%

Section: Trace Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

The significance of cephalopod beaks as a research tool: An update

Xavier

Golikov²,

Queirós³

et al. 2022

Front. Physiol.

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“…In marine ecosystems, cephalopods are key components due to their vast capacity to be predators or prey in coastal, pelagic, and deep-sea environments ( Guimaro et al, 2021 ; Krstulovíc and Vrgoc, 2009 ). Cephalopods also occupy environments with high physical and chemical variability from coastal zones to cold, stable and dark environments in the deep sea ( Barratt et al, 2007 ; Daly and Peck, 2000 ; Leite et al, 2009 ).…”

Section: Introductionmentioning

confidence: 99%

Climate change consequences on the systemic heart of female Octopus maya: oxidative phosphorylation assessment and the antioxidant system

Meza-Buendia,

Aparicio-Trejo,

Díaz

et al. 2024

Biology Open

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There is evidence that indicates that temperature modulates the reproduction of the tropical species Octopus maya, through the over- or under-expression of many genes in the brain. If the oxygen supply to the brain depends on the circulatory system, how temperature affects different tissues will begin in the heart, responsible for pumping the oxygen to tissues. The present study examines the impact of heat stress on the mitochondrial function of the systemic heart of adult O. maya. The mitochondrial metabolism and antioxidant defense system were measured in the systemic heart tissue of female organisms acclimated to different temperatures (24, 26, and 30°C). The results show that acclimation temperature affects respiratory State 3 and State 4o (oligomycin-induced) with higher values observed in females acclimated at 26°C. The antioxidant defense system is also affected by acclimation temperature with significant differences observed in superoxide dismutase, glutathione S-transferase activities, and glutathione levels. The results suggest that high temperatures (30°C) could exert physical limitations on the circulatory system through the heart pumping, affecting nutrient and oxygen transport to other tissues, including the brain, which exerts control over the reproductive system. The role of the cardiovascular system in supporting aerobic metabolism in octopus females is discussed.

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Evidence of eastern rockhopper penguin feeding on a key commercial pelagic arrow squid species

Guímaro,

Thompson,

Morrison

et al. 2024

Preprint

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Cephalopods play an important role in the Southern Ocean marine ecosystem connecting top predators and mid-trophic organisms. However, there is a lack of knowledge of the ecology of cephalopod fauna in the Pacific sector of the Southern Ocean. Stable isotope analysis (SIA) was applied to study the habitat and trophic ecology of cephalopods in the diet of eastern rockhopper penguin (Eudyptes chrysocome filholi) around Campbell Island, a New Zealand sub-Antarctic island. We assessed differences in the cephalopod component between two penguin breeding seasons, 1986-87 and 2012-13. Season 1986-87 showed a more diverse diet (7 vs. 3 species) without differences in size between the common species, Moroteuthopsis ingens and Octopus campbelli. In 2012-13, M. ingens was replaced by the squid Nototodarus sloanii in the penguin diet, suggesting changes in cephalopod biodiversity. Furthermore, δ13C and δ15N values of M. ingens revealed no significant differences between years, indicating stability in habitat and feeding ecology. However, O. campbelli displayed changes in δ13C and δ15N values, suggesting shifts in habitat and feeding habits. Environmental data indicated warmer oceanic temperatures around Campbell Island in 2012-13, possibly supporting the presence of N. sloanii. Our findings suggest changes in cephalopod biodiversity and the penguin diet between the two breeding seasons may have occurred. The presence of N. sloanii, a commercially valuable species, in later years highlights the significance of further research to explore the ecological dynamics between cephalopods and the local marine environment in this region.

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Cephalopods habitat and trophic ecology: historical data using snares penguin as biological sampler

Cited by 3 publications

References 60 publications

The significance of cephalopod beaks as a research tool: An update

The significance of cephalopod beaks as a research tool: An update

Climate change consequences on the systemic heart of female Octopus maya: oxidative phosphorylation assessment and the antioxidant system

Evidence of eastern rockhopper penguin feeding on a key commercial pelagic arrow squid species

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