Effect of light intensity and substrate type on siscowet lake trout (Salvelinus namaycush siscowet) predation on deepwater sculpin (Myoxocephalus thompsonii)

Trevor D. Keyler; Thomas R Hrabik; Allen Mensinger; Loranzie S. Rogers; Owen T. Gorman

doi:10.1007/s10750-019-3944-5

Effect of light intensity and substrate type on siscowet lake trout (Salvelinus namaycush siscowet) predation on deepwater sculpin (Myoxocephalus thompsonii)

Trevor D. Keyler, Thomas R Hrabik, Allen Mensinger, Loranzie S. Rogers, Owen T. Gorman

Biology (Duluth)

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Foraging characteristics of siscowet lake trout (Salvelinus namaycush siscowet) on deepwater sculpin (Myoxocephalus thompsonii) were studied under ecologically relevant downwelling light intensities (9.0 × 10⁸ to 1.62 × 10¹¹ photons m⁻² s⁻¹) and emission spectrum (500–510 nm) on varying substrates (gravel, sand, and black fabric). Siscowet reaction distance within our trials increased with light intensity up to 6.0 × 10⁹ photons m⁻² s⁻¹, after which reaction distance remained constant with additional increases in light intensity following the Michaelis–Menten saturation function. Reaction distances were not affected by substrate type under any light intensity. The number of prey captures also increased with increasing light intensity, with most orientations toward prey occurring within the siscowet’s forward sector (± 0°–60°, where 0° represents the tip of the siscowet rostrum). Finally, the overall probability of prey capture was positively related to reaction distance at each light intensity. Results suggest that siscowet can visually forage on benthic prey at great depth in Lake Superior, and reaction distance (≤ 27 cm) to sculpin may not diminish until depths exceed 200 m (6.00 × 10⁹ photons m⁻² s⁻¹).

Original language	English (US)
Pages (from-to)	77-88
Number of pages	12
Journal	Hydrobiologia
Volume	840
Issue number	1
DOIs	https://doi.org/10.1007/s10750-019-3944-5
State	Published - Sep 1 2019

Bibliographical note

Funding Information:
For assistance with collection of deepwater fishes, the authors thank the crew of the RV Kiyi. Funding for this project was provided by the US Geological Survey, Lake Superior Biological Station, University of Minnesota Duluth Biology Department, and National Science Foundation Grants IOS 1354745 and DOB 1359230 (AFM). The authors are grateful for the help and support from I. Harding, M. Pawlowski, J. Dobosenski, Minnesota Sea Grant, and the McNair Scholars Program at the University of Wisconsin-Superior. A special thanks to M. Joyce for help with statistical aspects of the paper, B. Matthias for his helpful editorial comments, and R. Mahling for his modeling expertise. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Publisher Copyright:
© 2019, Springer Nature Switzerland AG.

Keywords

Crypsis
Lake Superior
Pelagic
Reaction distance
Vision

Access

10.1007/s10750-019-3944-5

OpenUrl availability

Full text

Cite this

@article{380e10a438f54aa7b2a8715e86c1a432,

title = "Effect of light intensity and substrate type on siscowet lake trout (Salvelinus namaycush siscowet) predation on deepwater sculpin (Myoxocephalus thompsonii)",

abstract = "Foraging characteristics of siscowet lake trout (Salvelinus namaycush siscowet) on deepwater sculpin (Myoxocephalus thompsonii) were studied under ecologically relevant downwelling light intensities (9.0 × 108 to 1.62 × 1011 photons m−2 s−1) and emission spectrum (500–510 nm) on varying substrates (gravel, sand, and black fabric). Siscowet reaction distance within our trials increased with light intensity up to 6.0 × 109 photons m−2 s−1, after which reaction distance remained constant with additional increases in light intensity following the Michaelis–Menten saturation function. Reaction distances were not affected by substrate type under any light intensity. The number of prey captures also increased with increasing light intensity, with most orientations toward prey occurring within the siscowet{\textquoteright}s forward sector (± 0°–60°, where 0° represents the tip of the siscowet rostrum). Finally, the overall probability of prey capture was positively related to reaction distance at each light intensity. Results suggest that siscowet can visually forage on benthic prey at great depth in Lake Superior, and reaction distance (≤ 27 cm) to sculpin may not diminish until depths exceed 200 m (6.00 × 109 photons m−2 s−1).",

keywords = "Crypsis, Lake Superior, Pelagic, Reaction distance, Vision",

author = "Keyler, {Trevor D.} and Hrabik, {Thomas R} and Allen Mensinger and Rogers, {Loranzie S.} and Gorman, {Owen T.}",

note = "Funding Information: For assistance with collection of deepwater fishes, the authors thank the crew of the RV Kiyi. Funding for this project was provided by the US Geological Survey, Lake Superior Biological Station, University of Minnesota Duluth Biology Department, and National Science Foundation Grants IOS 1354745 and DOB 1359230 (AFM). The authors are grateful for the help and support from I. Harding, M. Pawlowski, J. Dobosenski, Minnesota Sea Grant, and the McNair Scholars Program at the University of Wisconsin-Superior. A special thanks to M. Joyce for help with statistical aspects of the paper, B. Matthias for his helpful editorial comments, and R. Mahling for his modeling expertise. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Publisher Copyright: {\textcopyright} 2019, Springer Nature Switzerland AG.",

year = "2019",

month = sep,

day = "1",

doi = "10.1007/s10750-019-3944-5",

language = "English (US)",

volume = "840",

pages = "77--88",

journal = "Hydrobiologia",

issn = "0018-8158",

publisher = "Springer Netherlands",

number = "1",

}

TY - JOUR

T1 - Effect of light intensity and substrate type on siscowet lake trout (Salvelinus namaycush siscowet) predation on deepwater sculpin (Myoxocephalus thompsonii)

AU - Keyler, Trevor D.

AU - Hrabik, Thomas R

AU - Mensinger, Allen

AU - Rogers, Loranzie S.

AU - Gorman, Owen T.

N1 - Funding Information: For assistance with collection of deepwater fishes, the authors thank the crew of the RV Kiyi. Funding for this project was provided by the US Geological Survey, Lake Superior Biological Station, University of Minnesota Duluth Biology Department, and National Science Foundation Grants IOS 1354745 and DOB 1359230 (AFM). The authors are grateful for the help and support from I. Harding, M. Pawlowski, J. Dobosenski, Minnesota Sea Grant, and the McNair Scholars Program at the University of Wisconsin-Superior. A special thanks to M. Joyce for help with statistical aspects of the paper, B. Matthias for his helpful editorial comments, and R. Mahling for his modeling expertise. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Publisher Copyright: © 2019, Springer Nature Switzerland AG.

PY - 2019/9/1

Y1 - 2019/9/1

N2 - Foraging characteristics of siscowet lake trout (Salvelinus namaycush siscowet) on deepwater sculpin (Myoxocephalus thompsonii) were studied under ecologically relevant downwelling light intensities (9.0 × 108 to 1.62 × 1011 photons m−2 s−1) and emission spectrum (500–510 nm) on varying substrates (gravel, sand, and black fabric). Siscowet reaction distance within our trials increased with light intensity up to 6.0 × 109 photons m−2 s−1, after which reaction distance remained constant with additional increases in light intensity following the Michaelis–Menten saturation function. Reaction distances were not affected by substrate type under any light intensity. The number of prey captures also increased with increasing light intensity, with most orientations toward prey occurring within the siscowet’s forward sector (± 0°–60°, where 0° represents the tip of the siscowet rostrum). Finally, the overall probability of prey capture was positively related to reaction distance at each light intensity. Results suggest that siscowet can visually forage on benthic prey at great depth in Lake Superior, and reaction distance (≤ 27 cm) to sculpin may not diminish until depths exceed 200 m (6.00 × 109 photons m−2 s−1).

AB - Foraging characteristics of siscowet lake trout (Salvelinus namaycush siscowet) on deepwater sculpin (Myoxocephalus thompsonii) were studied under ecologically relevant downwelling light intensities (9.0 × 108 to 1.62 × 1011 photons m−2 s−1) and emission spectrum (500–510 nm) on varying substrates (gravel, sand, and black fabric). Siscowet reaction distance within our trials increased with light intensity up to 6.0 × 109 photons m−2 s−1, after which reaction distance remained constant with additional increases in light intensity following the Michaelis–Menten saturation function. Reaction distances were not affected by substrate type under any light intensity. The number of prey captures also increased with increasing light intensity, with most orientations toward prey occurring within the siscowet’s forward sector (± 0°–60°, where 0° represents the tip of the siscowet rostrum). Finally, the overall probability of prey capture was positively related to reaction distance at each light intensity. Results suggest that siscowet can visually forage on benthic prey at great depth in Lake Superior, and reaction distance (≤ 27 cm) to sculpin may not diminish until depths exceed 200 m (6.00 × 109 photons m−2 s−1).

KW - Crypsis

KW - Lake Superior

KW - Pelagic

KW - Reaction distance

KW - Vision

UR - http://www.scopus.com/inward/record.url?scp=85064517729&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064517729&partnerID=8YFLogxK

U2 - 10.1007/s10750-019-3944-5

DO - 10.1007/s10750-019-3944-5

M3 - Article

AN - SCOPUS:85064517729

SN - 0018-8158

VL - 840

SP - 77

EP - 88

JO - Hydrobiologia

JF - Hydrobiologia

IS - 1

ER -

Effect of light intensity and substrate type on siscowet lake trout (Salvelinus namaycush siscowet) predation on deepwater sculpin (Myoxocephalus thompsonii)

Abstract

Bibliographical note

Keywords

Access

OpenUrl availability

Other files and links

Fingerprint

Cite this