Ecological Lifestyles and the Scaling Of Shark Gill Surface Area

Resource type
Date created
2018-12-01
Authors/Contributors
Abstract
Fish gill surface area varies across species and with respect to ecological lifestyles. The majority of previous studies only qualitatively describe gill surface area in relation to ecology and focus primarily on teleosts. Here, we quantitatively examined the relationship of gill surface area with respect to specific ecological lifestyle traits in elasmobranchs, which offer an independent evalu- ation of observed patterns in teleosts. As gill surface area increases ontogenetically with body mass, examination of how gill surface area varies with ecological lifestyle traits must be assessed in the context of its allometry (scaling). Thus, we examined how the relationship of gill surface area and body mass across 11 shark species from the literature and one species for which we made measurements, the Gray Smoothhound, Mustelus californicus, varied with three ecological lifestyle traits: activity level, habitat, and maximum body size. Relative gill surface area (gill surface area at a specified body mass; here we used 5,000g, termed the ‘standardized intercept’) ranged from 4,724.98 to 35,694.39 cm2 (mean and standard error: 17,796.65 2,948.61 cm2) and varied across species and the ecological lifestyle traits examined. Specifically, larger-bodied, active, oceanic species had greater relative gill surface area than smaller-bodied, less active, coastal species. In contrast, the rate at which gill surface area scaled with body mass (slope) was generally consistent across species (0.85 0.02) and did not differ statistically with activity level, habitat, or maximum body size. Our results suggest that ecology may influence relative gill surface area, rather than the rate at which gill surface area scales with body mass. Future com- parisons of gill surface area and ecological lifestyle traits using the quantitative techniques applied in this study can provide further insight into patterns dictating the relationship between gill surface area, metabolism, and ecological lifestyle traits.
Description
The full text of this paper will be available in December 2019 due to the embargo policies of Journal of Morphology. Contact summit@sfu.ca to enquire if the full text of the accepted manuscript can be made available to you.
Published as
Bigman, J. S., Pardo, S. A., Prinzing, T. S., Dando, M., Wegner, N. C., & Dulvy, N. K. (2018). Ecological lifestyles and the scaling of shark gill surface area. Journal of morphology, 279(12), 1716-1724. DOI: 10.1002/jmor.20879.
Publication details
Publication title
Journal of morphology
Document title
Ecological lifestyles and the scaling of shark gill surface area
Date
2018
Volume
279
Issue
12
First page
1716
Last page
1724
Publisher DOI
Copyright statement
Copyright is held by the author(s).
Scholarly level
Peer reviewed?
Yes
Language
Member of collection