Ecological and physiological aspects of the antarctic fishes Notothenia rossii and Notothenia coriiceps in Admiralty Bay, Antarctic Peninsula

Raga, Gabriela; Pichler, Helen Audrey; Zaleski, Tânia; Silva, Flavia Baduy Vaz da; Machado, Cíntia; Rodrigues, Edson; Kawall, Helena G.; Rios, Flávia Sant’Anna; Donatti, Lucélia

doi:10.1007/s10641-014-0311-2

Cited by 10 publications

(9 citation statements)

References 46 publications

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“…The fact that smaller individuals were caught in winter can be explained by the possible migration of large individuals during this period. Studies in Admiralty Bay, Antarctic Peninsula (Raga et al, 2015) indicate that larger individuals of this species are more common in warm water. The water temperature directly depends on the season, so the migration of large individuals to a warm place in winter is an acceptable explanation.…”

Section: Discussionmentioning

confidence: 94%

“…Frequency of occurrence. N. coriiceps is a common coastal species throughout the Southern Ocean, including the Antarctic Peninsula (Casaux & Barrera-Oro, 2013;Raga et al, 2015). This species always takes up the majority of the catches (Manilo et al, 2009;Trokhymets et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…The statistical analysis of the following indicators was carried out: hepatosomatic index (liver to body weight ratio), Fulton's (KF) and Clark's (KC) body condition factor, index of food (gastrointestinal tract contents to body weight ratio), total (TL) and standard (SL) body lengths, total body weight and body weight without entrails (Aleksienko & Podobailo, 1998;Raga et al, 2015;Plotnikov et al, 2018). Total and standard lengths were measured with an accuracy of 0.1 cm; body, organs and food weights were measured with an accuracy of 1 g. Fisher's Exact Test (F-test) for Count Data (Fisher, 1935) was used to compare the frequency of occurrence of diet components.…”

Section: Fishesmentioning

confidence: 99%

“…The increase in the average body size of fish in populations over time, especially in juveniles, is also an indicator of climate change. Indeed, an increase in temperature critically increases the metabolic level of polar fish (Raga et al, 2015). On the other hand, commercial fishing directly leads to strong changes in fish fauna.…”

Section: Introductionmentioning

confidence: 99%

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Allocation of the diet of the Argentine Islands’ inshore ichthyofauna

2021

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Fish diets are important indicators of ecosystem change. This aspect of the ichthyofauna of the coast of the Argentine Islands has been insufficiently studied in comparison with other regions. This article presents the results of comparison of dietary and somatic parameters of the dominant species Notothenia coriiceps depending on the point, depth and season of catch. The sample was collected between February 2006 and February 2007. In the year of study, N. coriiceps, Trematomus bernacchii, Chaenocephalus aceratus (common species), Harpagifer antarcticus and Pagothenia borchgrevinki (rare species in this region) were caught. The average fish size in this region does not differ from other places in the Southern Ocean. In Cornice Channel and Stella Creek, N. coriiceps was smaller than at other points due to the narrowness and shallow depth of these places. In winter, large individuals apparently migrated from the coast. The diet of N. coriiceps consisted mainly of crustaceans and seaweeds, with a small number of mollusks (especially limpets), which are common. The number of fish in the diet of N. coriiceps is relatively low for this region. Access to food was relatively the same at different points and depths of the catch. The lowest amount of food was in the fall, the highest amount of food was in the spring and summer. The condition and hepatosomatic index also did not change depending on the point and depth of the catch, but they were low in spring and high in summer. Perhaps this is due to the low energy value of food, which is not compensated by the amount. It is necessary to conduct studies of the diet of N. coriiceps in other years to clarify the specificity of fish in the diet and phenological changes in somatic parameters. Similar studies are needed for other species in the region if catches are sufficient to collect a representative sample.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Fishesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Allocation of the diet of the Argentine Islands’ inshore ichthyofauna

2021

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“…Evolutionary adaptations to the Antarctic environmental conditions can influence the sensitivity of organisms to stress [24][25][26][27]. Most biological processes in the benthos and tidal zone of the polar seas, including growth, reproduction and metabolism are slow, which reduces the ability to detoxify and remove contaminants, making Antarctic organisms especially sensitive to additional environmental stress [28,29].…”

Section: Introductionmentioning

confidence: 99%

Time course of lead induced proteomic changes in gill of the Antarctic limpet Nacella Concinna (Gastropoda: Patellidae)

Piechnik

Höckner

Souza

et al. 2017

Journal of Proteomics

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Proteomic analysis of gill tissue in Antarctic limpets exposed to different concentrations of lead (Pb) over a 168 h time period showed that proteomic changes vary with time. These changes included an increase in the demand of scavenging reactive oxygen species, acid-base balance and a challenge to protein homeostasis in the endoplasmic reticulum early on and subsequently an increase in energy metabolism, cellular signaling, and cytoskeletal modifications. Based on this time course, we hypothesize that the main mode of action of lead is a replacement of metal-cofactors of key enzymes involved in the scavenging of reactive oxygen species and the regulation of acid-base balance.

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