Journal: Conservation Physiology

Article Title: Validation of a microwave energy meter to non-lethally estimate energetic reserves in adult sturgeon

doi: 10.1093/conphys/coad023

Figure Lengend Snippet: Visual representation of the ventral (panel A) and lateral (panel B) Fatmeter measurement sites (shown by patterned rectangles) that were measured to estimate whole-body lipid and energy in captive adult pallid sturgeon, Scaphirhynchus albus . The sites highlighted in grey were included in the analyses. The Fatmeter site codes (panel C) denote the site’s position on the dorsoventral (U: upper, Ab: abdominal, V: ventral) and anteroposterior (A: anterior, M: middle, P: posterior) axes. This figure uses modified images of a shovelnose sturgeon, Scaphirhynchus platorynchus (A; ) and a white sturgeon, Acipenser transmontanus (B; ).

Article Snippet: Here we present the first successful validation of a microwave energy meter, the Distell Fatmeter, to non-lethally estimate WB energetic reserves in an adult sturgeon species, after our previous attempt with juvenile pallid sturgeon ( Djokic et al., 2022 ).

Techniques: Modification

Journal: Conservation Physiology

Article Title: Validation of a microwave energy meter to non-lethally estimate energetic reserves in adult sturgeon

doi: 10.1093/conphys/coad023

Figure Lengend Snippet: Regression models (with coefficients) for estimating the whole-body (WB) lipid (%) and energy content (kcal/100 g) of captive adult pallid sturgeon, Scaphirhynchus albus (body mass [BM] of 3342.7 ± 121.2 g, mean ± SE), n = 43. The recommended models are presented in comparison with the best fit models using only body metrics and the AICc top-ranked models. The recommended models were determined based on the trade-off between AICc ranking and the minimization of the number of Fatmeter measurements to minimize fish handling time. All P values were <0.001. Abbreviations: AICc is second-order Akaike Information Criterion; KnR is Randall’s relative condition (no units; based on Randall’s FL-at-BM relationship); Avg denotes the average of the specified sites; The Fatmeter site codes denote the site’s position on the dorsoventral (U: upper, Ab: abdominal) and anteroposterior (A: anterior, M: middle, P: posterior) axes

Article Snippet: Here we present the first successful validation of a microwave energy meter, the Distell Fatmeter, to non-lethally estimate WB energetic reserves in an adult sturgeon species, after our previous attempt with juvenile pallid sturgeon ( Djokic et al., 2022 ).

Techniques: Comparison

Journal: Conservation Physiology

Article Title: Validation of a microwave energy meter to non-lethally estimate energetic reserves in adult sturgeon

doi: 10.1093/conphys/coad023

Figure Lengend Snippet: The recommended models for estimating whole-body (WB) lipid (panel A) and WB energy (panel B) of captive adult pallid sturgeon (BM of 3342.7 ± 121.2 g, mean ± SE), n = 43. Values for WB lipid and energy were transformed (WB Lipid 0.25 and −WB Energy -0.7 ); the units for the pre-transformed values are % for WB lipid and kcal/100 g for WB energy. The abbreviation U-P denotes the Upper-Posterior Fatmeter site. Data point colour and shade, respectively, denote sex (red = female; blue = male, unfilled = sex undetermined) and, for females only, gonad developmental stage (dark red = post-late vitellogenic; light red = pre-late vitellogenic).

Article Snippet: Here we present the first successful validation of a microwave energy meter, the Distell Fatmeter, to non-lethally estimate WB energetic reserves in an adult sturgeon species, after our previous attempt with juvenile pallid sturgeon ( Djokic et al., 2022 ).

Techniques: Transformation Assay