scholarly journals Examining the utility of bulk otolith δ13C to describe diet in wild-caught black rockfish Sebastes melanops

2015 ◽  
Vol 23 (3) ◽  
pp. 201-208 ◽  
Author(s):  
VR von Biela ◽  
SD Newsome ◽  
CE Zimmerman
Keyword(s):  
Black Rockfish ◽  
Sebastes Melanops

Feeding behaviour of the kelp clingfish Rimicola muscarum residing on the kelp Macrocystis integrifolia

1978 ◽  
Vol 56 (4) ◽  
pp. 711-712 ◽  
Author(s):  
William Roland
Keyword(s):  
Food Chain ◽  
Feeding Behaviour ◽  
Black Rockfish ◽  
Harpacticoid Copepods ◽  
Macrocystis Integrifolia ◽  
Sebastes Melanops

The feeding behaviour of the kelp clingfish Rimicola muscarum Meek and Pierson residing on the blades of the kelp Macrocystis integrifolia Bory was described. The fish seized small invertebrates, mainly harpacticoid copepods, which were closely associated with the kelp blades. A four-step food chain involving R. muscarum was qualitatively determined. Diatoms epiphytic on the kelp blades were grazed by harpacticoid copepods. These and other small invertebrates were captured by the clingfish, which in turn was eaten by the black rockfish, Sebastes melanops, and the shiner perch, Cymatogaster aggregata.

scholarly journals Patterns in vertical movements of black rockfish Sebastes melanops

2008 ◽  
Vol 2 ◽  
pp. 57-65 ◽  
Author(s):  
SJ Parker ◽  
JM Olson ◽  
PS Rankin ◽  
JS Malvitch
Keyword(s):  
Vertical Movements ◽  
Black Rockfish ◽  
Sebastes Melanops

Growth of juvenile black rockfish (Sebastes melanops) during estuarine residence

2021 ◽  
Author(s):  
Brittany D. Schwartzkopf ◽  
Lorenzo Ciannelli ◽  
John C. Garza ◽  
Scott A. Heppell
Keyword(s):  
Black Rockfish ◽  
Sebastes Melanops

scholarly journals Home site fidelity in Black Rockfish, Sebastes melanops, reintroduced into a fjord environment

2013 ◽  
Vol 127 (3) ◽  
pp. 255 ◽  
Author(s):  
Jeff Marliave ◽  
Alejandro Frid ◽  
David W. Welch ◽  
Aswea D. Porter
Keyword(s):  
Site Fidelity ◽  
Release Site ◽  
Home Ranges ◽  
Horizontal Distance ◽  
Fishing Mortality ◽  
Black Rockfish ◽  
Acoustic Data ◽  
Area 6 ◽  
Sebastes Melanops ◽  
Steep Slopes

Between December 2004 and January 2007, we studied the movements of six Black Rockfish (Sebastes melanops) that had been fitted with acoustic transmitters and reintroduced into a fjord environment at the edge of Vancouver Harbour, British Columbia. The Black Rockfish were released in December 2004 and April 2005 at a reef characterized by complex rocky structures and steep slopes; bottom depths at the site dropped from 10 to 55 m within a horizontal distance of only 30 m. The reef, however, is small (approximately 4500 m2) and is surrounded by soft bottom habitats used infrequently by Black Rockfish. VEMCO VR2 receivers were deployed at the release site and at outlying reefs located 1 and 4 km away. Acoustic data suggest that one individual emigrated from the reef after 11 months of residency and a second individual disappeared abruptly after 6 weeks on the reef, possibly due to fishing mortality or emigration. The four remaining individuals appear to have confined their movements to the release site, using an area 6 to 10 times smaller than the home ranges reported for populations in low-gradient coastlines in California and Oregon.

Contrasting effects of coastal upwelling on growth and recruitment of nearshore Pacific rockfishes (genus Sebastes)

2020 ◽  
Vol 77 (6) ◽  
pp. 950-962
Author(s):  
Russell W. Markel ◽  
Jonathan B. Shurin
Keyword(s):  
Coastal Upwelling ◽  
Early Life History ◽  
Benthic Species ◽  
Black Rockfish ◽  
Ocean Climate ◽  
Marine Population ◽  
History Of ◽  
Sebastes Melanops ◽  
The Relationship ◽  
Sebastes Caurinus

Knowledge of processes underlying recruitment is critical for understanding marine population dynamics and their response to ocean climate. We investigated the relationship between coastal upwelling and early life history of black rockfish (Sebastes melanops), a midwater aggregating species, and CQB rockfishes (a solitary benthic species complex including Sebastes caurinus, Sebastes maliger, and Sebastes auriculatus), between two oceanographically distinct years on the west coast of Vancouver Island, Canada. We analysed otolith microstructure to determine parturition and settlement dates, pelagic durations, and pre- and postsettlement growth rates. High CQB rockfish recruitment in 2005 was associated with prolonged downwelling and warm ocean temperatures, late parturition dates, fast presettlement growth, short pelagic durations, and small size-at-settlement. In contrast, high black rockfish recruitment in 2006 was associated with strong upwelling and cool ocean temperatures, slow presettlement growth, and protracted pelagic durations. Presettlement growth of both rockfish complexes increased with high sea surface temperature, but was unrelated to chlorophyll a concentration. Our results indicate that the same oceanographic conditions give rise to fast presettlement growth and short pelagic durations for both groups, but that different factors lead to strong recruitment in each.

A comparison of population structure in black rockfish (Sebastes melanops) as determined with otolith microchemistry and microsatellite DNA

2005 ◽  
Vol 62 (10) ◽  
pp. 2189-2198 ◽  
Author(s):  
J A Miller ◽  
M A Banks ◽  
D Gomez-Uchida ◽  
A L Shanks
Keyword(s):  
Population Structure ◽  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Microsatellite Dna ◽  
Function Analysis ◽  
Otolith Microchemistry ◽  
Larval Period ◽  
Complementary Information ◽  
Black Rockfish ◽  
Sebastes Melanops

The black rockfish (Sebastes melanops) is a long-lived (≤50 years) viviparous species with an extended pelagic larval period (3–5 months) and a broad continental distribution. Prolonged larval periods have been assumed to lead to widespread dispersal resulting in minimal population structure. We tested this assumption by comparing otolith microchemistry and microsatellite DNA of adult black rockfish from four locations in Oregon and Washington. We observed significant differences among locations in element-to-Ca ratios (Mg:Ca, Mn:Ca, Zn:Ca, Sr:Ca, and Ba:Ca) at the otolith edge, which represented the last year of life. Discriminant function analysis, based on otolith element-to-Ca ratios classified, on average, 64% of the fish to collection location, suggesting that the majority of individuals from these locations did not mix. Using microsatellite DNA, we observed significant genetic differences among adults collected 340–460 km apart (FST = 0.018 ± 0.004). Using five and seven loci, 63% and 75% of the fish, respectively, were correctly assigned to collection location. These two techniques provided corroborative and complementary information on the population structure of S. melanops.

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