fishes associated with deep reefs in the western north ... · 1. differences in degree of...
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Fishes associated with deep reefs in the western North Atlantic:
New Species, Rare Observations, and a Characteristic Fauna
Andrea M. Quattrini USGS SE Ecological Science Center Steve W. Ross University NC Wilmington
Photo: Gephyroberyx darwinii hiding in a Leiopathes colony (Photo Credit: USGS DISCOVRE)
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Photo Credit: M. Westneat, Andros Bahamas
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Photo Credit: Lophelia II
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Direct Observations to Survey Deep Reef Habitats
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Photo Credit: Lophelia II
What is the degree to which fishes are specifically & predictably associated with reef habitat in the deep sea?
Do fish assemblages differ between reef and non-reef habitats?
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Viosca Knolls
Gulf Penn
Ross and Quattrini 2007
Cape Lookout A & B Cape Fear
N & S Cape Canaveral
Stetson Banks
Jacksonville Lithoherms
Savannah Banks
What is the degree to which fishes are specifically and predictably associated with reef habitat?
• 65 JSL dives in 8 study areas (366-769 m) • 33 otter trawls around reefs
• Video data when sub transecting
• Categorized Prime, Transition, Off-Reef
habitats
• Rel. Abundances and multivariate analyses (nMDS, hierarchical clustering, ANOSIM, SIMPER)
Prime Transition Off Reef
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Ross and Quattrini 2007
Characteristic Deep Reef Fish Fauna off SEUS: Species Specific to Deep Reef Habitats
31 Dominant Spp 14: reef habitat 6: off reef habitat
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F. plutonia C. agassizi
Characteristic Deep Reef Fish Fauna off SEUS: Distinct from Background Fauna
Ross and Quattrini 2007
30% Similarity
Bray Curtis Similarity 4th Root Transformed Relative Abundances
39 spp., 58 Samples
R=0.5. p=0.001
L. melanurum H. dactylopterus
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Does this reef-off reef pattern hold in the GoM?
West FL Slope
VK862/906 MC751
• 25 dives-JSL II and ROV Kraken • 4 Sites MC751, VK862/906, VK826, WFL • Same methods using video collected while transecting MC751
VK826 WFL Slope VK862
VK826
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Characteristic Deep Reef Fish Fauna in GoM: Species Specific to Deep Reef Habitats
36 Dominant Spp 16: reef habitat 15: off reef habitat
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30% Similarity
Bray Curtis Similarity 4th Root Transformed Relative Abundances
45 spp, 45 Samples
Characteristic Deep Reef Fish Fauna in GoM: Distinct from Background Fauna
R=0.76. p=0.001
W Fl W Fl
VK & MC
VK & MC
F. plutonia C. agassizi G. brachiusculus H. dactylopterus
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Photo Credit: Lophelia II
Does the reef fish fauna change over the slope?
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Cape Lookout A & B Cape Fear
N and S Cape Canaveral
Stetson Banks
Jacksonville Lithoherms
Savannah Banks
Does the reef fish fauna change over the slope?
Ross and Quattrini 2007, 2009, in prep.
• 70 dives in 9 study areas
• Lophelia reefs to rubble fields to wrecks to rocky lithoherms capped/ uncapped with DSCs
• Video data from prime/transition reef
• Multivariate Analyses (nMDS, hierarchical clustering, ANOSIM, SIMPER)
Cape Lookout A Stetson Jacksonville
Republic Wreck
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Characteristic Deep Reef Fish Fauna Changes with Depth: Additional Habitat Differences?
30% Similarity 40% Similarity
Ross and Quattrini 2009
Bray Curtis Similarity Square Root Transformed Relative Abundances
42 spp, 70 Dives
R=0.23-1.00, P<0.05
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Photo Credit: Lophelia II
Do deep reef fish assemblages differ between the GoM and the SEUS?
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Characteristic Deep Reef Fish Fauna Changes 1)Regionally, 2)Bathymetrically, & 3) by Habitat?
20% Similarity 30% Similarity 40% Similarity
Bray Curtis Similarity Square Root Transformed Relative Abundances
56 spp, 94 Dives
GOM vs SEUS Global R=0.6, p=0.001
312-436 m R>0.56
434-587 m R>0.57
366-450 m
489-490 m
506-687 m
688-769 m
R>0.5, p<0.05
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N. Atl Canyons & Mytilus Seamount
Mid Atl. Canyons
Cape Lookout Cape Fear
Cape Canaveral
Stetson Banks
Jacksonville Lithoherms
Savannah Banks
West FL Slope
Viosca Knolls
Extensive Lophelia pertusa Seamounts Other areas with DSCs
Seamounts in Anegada Passage
MC751
Republic Wreck
The Point
Pourtales Terrace
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Often Observed Fishes in Physical Contact with DSCs At Lophelia reefs
Conger Eel (Conger oceanicus)
Blackbelly Rosefish (Helicolenus dactylopterus)
Alfonsino (Beryx decadactylus)
Roughy (Hoplostethus occidentalis)
Coral hake (Laemonema melanurum)
Blotched Catshark (Scyliorhinus meadi)
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Often Observed Fishes in Physical Contact with DSCs And often associated with Black corals & Octocorals
Yellowfin Bass (Anthias nicholsi) Roughy (Hoplostethus occidentalis)
Slimehead (Gephyroberyx darwinii) Cusk eel (Benthocometes robustus)
Photo Credit: Peter Etnoyer
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Catshark Nursery Area in GoM (Etnoyer & Warrenchuk 2007): MC885: C. delta and Apristurus riveri
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“Rare” Fishes Common in DSC Habitat
Sharpcheek Scorpionfish (Idiastion kyphos)
Deep-water Goosefish (Sladenia shaefersi)
White Saddled Catshark (Scyliorhinus hesperius)
Dragonet (Centrodraco acanthopoma)
Swallowtail Bass (Anthias woodsi)
Codling (Physiculus karrerae)
Pietsch et al. 2013
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Rubicundus lopheliae (Fernholm and Quattrini 2008)
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Bellottia robusta & Bellottia cryptica Nielsen, Ross and Cohen 2009
B. robusta
B. cryptica
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Ophichthus brevirostris McCosker and Ross 2007
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Summary
1. Characteristic deep reef fauna different from off reef community • Deep reefs comprising complex structure: rocks, Lophelia bioherms, wrecks • Primary and secondary reef fishes
2. Many species in physical contact with DSCs • Includes antipatharians, octocorals, scleractinians • In some cases, support nursery areas
3. Deep reef fauna changes biogeographically and bathymetrically • Additional influence of fine scale habitat structure? • Importance of historical events, water masses, and habitat suitability/availability shaping local community structure
Photo Credit: Lophelia II
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Further Questions
1. Differences in degree of coral-fish associations based on type of reef habitat?
• Octocoral gardens, Lophelia bioherms, canyon/rock habitats with attached corals
2. What is the resident time of fishes in coral habitats?
• Tracking fishes using otolith or specific tissue microchemistry, acoustic telemetry
4. Does habitat specificity decrease with increasing latitude and depth?
• Higher species diversity may equate to more biotic interactions and more niche dimensions
3. What is the degree of population connectivity between reef habitats? • Estimates of degree and direction of gene flow
Photo Credit: NOAA Okeanos Explorer Program
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Snowy Grouper (Epinephelus niveatus)
Commercially/Recreationally Important Species
Wreckfish (Polyprion americanus)
Barrelfish (Hyperoglyphe perciformis) BBRF (Helicolenus dactylopterus)
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Ongoing Work
Photo Credit: NOAA Okeanos Explorer Program
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Mid-Atlantic Canyons Project (2011-2015): Pathways to the Abyss
34 dives: 2 Cold Seeps, 2 Major Canyons Norfolk
Baltimore
2013 NEUS Canyons Expedition Okeanos Explorer
31 dives on Broad-Scale Habitat Features: 11 Canyons, 5 Open Slope Areas, 3 Cold Seeps
2 Intercanyons, Mytilus Seamount
Two Projects Examining Fish Communities in & around Canyons
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Submarine Canyons Hotspots of Coral Diversity
Photo: Busby et al. 2006
Photo Credits: NOAA Okeanos Explorer Program
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Fish Communities in Structured Habitats (Canyons and Cold Seeps)
Differ from Soft Substrate Communities
• 68 Demersal Fishes • Coral Presence was not a factor (AMOSIM, R=0.03,
p=0.06) • Communities found along canyon walls & in dead
mussel habitat differed from less complex habitats Ross et al. in prep.
SS Rock
Seep
Lophius americanus
Brosme brosme
Benthocometes robustus
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Broad-Scale Habitat Features, Depth, & Coral Richness Explains Variation in Demersal Fish Assemblages
on NEUS Continental Margin
• 68 Demersal Fishes • Coral diversity likely an indicator of habitat
suitability (organic matter input, increased heterogeneity)
• Few observations of fishes in contact with corals
• Several generalist species, but also unique species in canyons versus open slope habitats
Quattrini et al. in prep. False Boarfish (Neocyttus helgae)
Rockling (Gaidropsarus sp.)
Photo Credit: NOAA Okeanos Explorer Program
BEST Model Results, PRIMER+PERMANOVA
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Fish-Habitat Associations & Community Structure on
Seamounts in the Anegada Passage (A. Demopoulos, J. Chaytor, U. ten Brink, E. Cordes PIs)
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Misty Grouper (Hyporthodus mystacinus)
Lionfish (Pterois volitans)
Cusk eels (?Benthocometes robustus)
Common Shallow, Mesophotic, and Deep-sea Reef fishes Depth Range: 2157 to 162 m
Photo Credit: Ocean Exploration Trust-Anegada Passage Expedition
Moray (Gymnothorax maderensis)
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Acknowledgements Funding: BOEM, USGS, NOAA-OE, Ocean Exploration Trust Projects: Life on the Edge, Lophelia II, Mid-Atl Canyons, Anegada Pass. Sub Crews: HOV JSL, ROV Jason II, ROV D2, ROV Kraken II Ship Crews: Seward-Johnson I and II, Okeanos Explorer, Ronald H. Brown, Nancy Foster, Cape Hatteras Ichthyologists: W. Anderson, J. Caruso, D. Dagit, W. Eschmeyer, B. Fernholm, T. Iwamoto, J. Nielsen, J. McCosker, J. McEachran, J. Moore, T. Munroe, G. Naylor, D. Smith And many amazing colleagues, at-sea science crew, etc. etc…. Photo Credits in Presentation: Lophelia II 2009 & 2010, Ross et al., USGS Discovre, Ocean Exploration Trust-Anegada Passage Expedition, & NOAA Okeanos Explorer Program
Photo Credit: Lophelia II