دورية أكاديمية
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Contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal Arctic fish species.

التفاصيل البيبلوغرافية
العنوان: Contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal Arctic fish species.
المؤلفون: Pettitt-Wade H; Fisheries and Oceans Canada, Freshwater Institute, Winnipeg, MB, R3T 2N6, Canada. pettitth@uwindsor.ca.; Integrative Biology, University of Windsor, Windsor, ON, N9B 3P4, Canada. pettitth@uwindsor.ca., Hussey NE; Integrative Biology, University of Windsor, Windsor, ON, N9B 3P4, Canada., Gallagher CP; Fisheries and Oceans Canada, Freshwater Institute, Winnipeg, MB, R3T 2N6, Canada., Lea EV; Fisheries and Oceans Canada, Inuvik, NT, X0E 0T0, Canada., Orrell DL; Integrative Biology, University of Windsor, Windsor, ON, N9B 3P4, Canada., Loseto LL; Fisheries and Oceans Canada, Freshwater Institute, Winnipeg, MB, R3T 2N6, Canada.; Environment and Geography, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada.
المصدر: Oecologia [Oecologia] 2023 Jul; Vol. 202 (3), pp. 601-616. Date of Electronic Publication: 2023 Jul 24.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Springer Country of Publication: Germany NLM ID: 0150372 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1432-1939 (Electronic) Linking ISSN: 00298549 NLM ISO Abbreviation: Oecologia Subsets: MEDLINE
أسماء مطبوعة: Original Publication: Berlin ; New York, Springer.
مواضيع طبية MeSH: Ecosystem* , Nutritional Status*, Animals ; Arctic Regions ; Canada ; Trout
مستخلص: Within and among species variation in trophic and habitat shifts with body size can indicate the potential adaptive capacity of species to ecosystem change. In Arctic coastal ecosystems, which experience dramatic seasonal shifts and are undergoing rapid change, quantifying the trophic flexibility of coastal fishes with different migratory tactics has received limited attention. We examined the relationships among body length and condition (Fulton's K, phase angle from Bioelectrical Impedance Analysis) with trophic and habitat shifts (differences in δ 15 N and δ 13 C between blood tissues with different turnover rates) of two abundant and culturally important species, anadromous Arctic char (Salvelinus alpinus, n = 38) and sedentary Greenland cod (Gadus ogac, n = 65) during summer in coastal marine waters near Ulukhaktok, Northwest Territories, Canada. Habitat shifts (δ 13 C) increased with length (i.e., pelagic to benthic-littoral) and crossed-equilibrium (zero) at mid-sizes for both species. Seasonal trophic shifts (δ 15 N) were generally positive (i.e., increasing trophic level) for Arctic char and negative for Greenland cod. As hypothesised, intra-individual variation in size-based trophic shifts (δ 15 N-length residuals) increased with length for Arctic char. However, there were no trends with length in Greenland cod. Our findings highlight the importance of flexibility through ontogeny and mobility for Arctic char, whereas Greenland cod were generalist to localized prey and habitat across all sizes. The significant effect of body condition (phase angle) on size-based trophic shifts in Arctic char, and size-based habitat shifts in Greenland cod, highlight the potential trade-offs of contrasting life history strategies and capacity for ontogenetic niche plasticity.
(© 2023. Crown.)
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فهرسة مساهمة: Keywords: Arctic char; Dietary shift; Greenland cod; Individual specialization; Stable isotopes
تواريخ الأحداث: Date Created: 20230724 Date Completed: 20230731 Latest Revision: 20230801
رمز التحديث: 20231215
مُعرف محوري في PubMed: PMC10386975
DOI: 10.1007/s00442-023-05423-9
PMID: 37488308
قاعدة البيانات: MEDLINE
الوصف
تدمد:1432-1939
DOI:10.1007/s00442-023-05423-9