ArticleJournal of comparative physiology. B, Biochemical, systemic, and environmental physiology2012
Development of the aerobic dive limit and muscular efficiency in northern fur seals (Callorhinus ursinus).
Article in Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
12 citing papers in PubMed, 23 citations in OpenAlex.
- Iron mobilization during lactation reduces oxygen stores in a diving mammal.Nature communications · 2022Article
- Fur seals do, but sea lions don't - cross taxa insights into exhalation during ascent from dives.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021Article
- Morphological study of the integument and corporal skeletal muscles of two psammophilous members of Scincidae (Scincus scincus and Eumeces schneideri).Journal of morphology · 2021Article
- Diving deep into trouble: the role of foraging strategy and morphology in adapting to a changing environment.Conservation physiology · 2020Article
- Links between muscle phenotype and life history: differentiation of myosin heavy chain composition and muscle biochemistry in precocial and altricial pinniped pups.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2019Article
- Comparative physiology of vocal musculature in two odontocetes, the bottlenose dolphin (Tursiops truncatus) and the harbor porpoise (Phocoena phocoena).Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2018Article
- Swimming metabolic rates vary by sex and development stage, but not by species, in three species of Australian otariid seals.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2017Article
- Scaling matters: incorporating body composition into Weddell seal seasonal oxygen store comparisons reveals maintenance of aerobic capacities.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2015Article
- The degradation of proteins in pinniped skeletal muscle: viability of post-mortem tissue in physiological research.Conservation physiology · 2015Article
- A review of the multi-level adaptations for maximizing aerobic dive duration in marine mammals: from biochemistry to behavior.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2014Review
- Short-term episodes of imposed fasting have a greater effect on young northern fur seals (Callorhinus ursinus) in summer than in winter.Conservation physiology · 2014Article
- Constraint lines and performance envelopes in behavioral physiology: the case of the aerobic dive limit.Frontiers in physiology · 2012Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Northern fur seal (Callorhinus ursinus; NFS) populations have been declining, perhaps due to limited foraging ability of pups. Because a marine mammal's proficiency at exploiting underwater prey resources is based on the ability to store large amounts of oxygen (O(2)) and to utilize these reserves efficiently, this study was designed to determine if NFS pups had lower blood, muscle, and total body O(2) stores than adults. Pups (<1-month old) had a calculated aerobic dive limit only ~40% of adult females due to lower blood and, to a much greater extent, muscle O(2) stores. Development of the Pectoralis (Pec) and Longissimus dorsi (LD) skeletal muscles was further examined by determining their myosin heavy chain (MHC) composition and enzyme activities. In all animals, the slow MHC I and fast-twitch IIA proteins typical of oxidative fiber types were dominant, but adult muscles contained more (Pec ~50%; LD ~250% higher) fast-twitch MHC IID/X protein characteristic of glycolytic muscle fibers, than pup muscles. This suggests that adults have greater ability to generate muscle power rapidly and/or under anaerobic conditions. Pup muscles also had lower aerobic and anaerobic ATP production potential, as indicated by lower metabolically scaled citrate synthase, β-hydroxyacyl CoA dehydrogenase, and lactate dehydrogenase activities (all P values ≤0.001). In combination, these findings indicate that pups are biochemically and physiologically limited in their diving capabilities relative to adults. This may contribute to lower NFS first year survival.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.