DOCSLIB.ORG

The Distribution of Pelagic Juvenile Rockfish of the Genus Sebastes in the Upwelling Region Off Central California Ralph J

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The Distribution of Pelagic Juvenile Rockfish of the Genus Sebastes in the Upwelling Region Off Central California Ralph J LARSON ET AL.: DISTRIBUTION OF PELAGIC JUVENILE ROCKFISH CalCOFl Rep., Vol. 35, 1994 THE DISTRIBUTION OF PELAGIC JUVENILE ROCKFISH OF THE GENUS SEBASTES IN THE UPWELLING REGION OFF CENTRAL CALIFORNIA RALPH J. LARSON WILLIAM H. LENARZ AND STEPHEN RALSTON Department of Biology National Manne Fishenes Semce San Francisco State University 31 50 Paradlse Dnve San Francisco. California 94132 Tiburon, California 94920 ABSTRACT en la composici6n por especies y tallas. Los juveniles Many species of central California rockfishes conclude peligicos mas pequeiios se encontraron a menudo ale- their pelagic stage during the spring-summer upwelling jados de la costa, en la regibn asociada a1 frente de la sur- period, when advection of surface waters could carry gencia, lo que sugiere que fueron transportados por la them away from nearshore postpelagic habitats. We ex- corriente de surgencia. Sin embargo, pocos juveniles amined the distributions of late-stage pelagic juvenile peligicos fueron encontrados del lado hacia mar aden- rockfish in April and May/June of 1987 and 1988, based tro del frente de la surgencia. Los juveniles peligicos de on midwater-trawl surveys between Point Reyes and mayor tamaiio se encontraron a menudo pr6ximos a la Monterey Bay, California. Distributional patterns were costa, aun en 10s periodos de actividad de la surgencia. complex, and changed rapidly with changing oceano- Lo anterior sugiere que 10s juveniles peligicos cambian graphic conditions and with changes in species and size su comportamiento durante sus fases tardias, lo que les composition. The smallest pelagic juveniles often ap- permite desplazarse hacia la costa, o bien, permanecer peared offshore, in the region of the upwelling front, alli a pesar de la surgencia. Asimismo encontramos evi- which suggested that they had been advected offshore dencia de un proceso mas pasivo de advecci6n y reten- at some time during upwelling. However, few pelagic cibn de juveniles peligicos de todas las tallas, incluyendo juveniles were found offshore of the upwelling front. movimiento hacia la costa durante periodos de aflo- Larger pelagic juveniles were often found close to shore, jamiento de la surgencia. Este aflojamiento podria ser un even when upwelling was active. This suggests that later- aspect0 importante per0 no determinante para el es- stage pelagic juveniles undergo behavioral changes that tablecimiento de 10s juveniles del rocot del hibitat enable them to move toward shore or remain there in peligico a1 post-peligico. En tal caso, la advecci6n du- spite of upwelling. We also found evidence of more pas- rante la surgencia podria no tener un efecto negativo sive advection and retention of pelagic juveniles of all en el asentamiento y reclutamiento final del rocot. sizes, including onshore movement during relaxation of upwelling. It appears that relaxation of upwelling may INTRODUCTION be a sufficient but not necessary aspect of the settlement The problems of drift and retention in marine ani- ofjuvenile rockfish from pelagic to postpelagic habitats. mals with pelagic larval stages are widely recognized (e.g., If so, advection during upwelling may not have a neg- Norcross and Shaw 1984; Bakun 1985, 1986; Sinclair ative effect on the settlement and ultimate recruitment 1988). To complete their life cycles, pelagic individuals of rockfish. must either remain in areas suitable for the next stage in the life cycle, or travel from the pelagic zone to these RESUMEN areas. Coastal upwelling systems pose a particular prob- Muchas especies de rocot del centro de California lem in this respect, since surface waters are transported concluyen su estadio peligico durante el period0 de sur- offshore, possibly carrying propagules away f?om the areas gencias de primavera-verano, cuando la advecci6n de las inhabited by postpelagic juveniles. Parrish et al. (1981), aguas superficiales podria transportarlos lejos de 10s hibitats Bakun and Parrish (1982), and Bakun (1985) suggested post-peligicos cercanos a la costa. Examinamos 10s pa- that the potential for offshore advection of larvae has se- trones de distribucibn de 10s estadios tardios de 10s ju- lected for reproductive patterns that minimize the ex- veniles peligicos de 10s rocot durante abril y mayo/junio posure of larvae to upwehg condtions, and Roughgarden de 1987 y 1988. Los ejemplares fueron obtenidos por et al. (1988) described the negative effect of offshore ad- medio de arrastres a media agua en un irea compren- vection in barnacles. dida entre Punta Reyes y la Bahia de Monterey, Dozens of species of rockfish in the genus Sebastes in- California. Los patrones de distribucibn encontrados habit the shelf and coastal zones in the region of maxi- fueron complejos y cambiaron ripidamente de acuerdo mum upwelling between Cape Blanco, Oregon, and a las condiciones oceanogrificas y de acuerdo a cambios Point Conception, California (Chen 1971). Many of these species bear young in winter and early spring, [Manuscript received January 22, 1994.1 before upwehng begins (Kendall and Lenarz 1987; Wyllie 175 LARSON ET AL.: DISTRIBUTION OF PELAGIC JUVENILE ROCKFISH CalCOFl Rep., Vol. 35, 1994 Echeverria 1987). However, the larvae and juveniles of months, and appear to grow at a rate of about 0.5 mm many species remain pelagic well into the springsummer per day (Woodbury and Ralston 1991). They trans- upwelling period (Kendall and Lenarz 1987; Moser and form into pelagic juveniles at least 20 mm long before Boehlert 1991), so that juveniles of these species must leaving the pelagic zone for juvenile habitats. The ju- settle from the pelagic zone when upwelling is active venile habitats vary among species at several scales (Love (Anderson 1983; Carr 1983, 1991). Thus, while vivi- et al. 1991). Species of Sebastes commonly leave the parity and winter spawning in rockfishes could be pelagic zone for habitats that are shallower than those seen as adaptations to the negative effects of offshore occupied by adults, often recruiting to areas quite near advection during upwelling (Parrish et al. 1981; Ainley shore (Love et al. 1991). Observations by divers demon- et al. 1993), the late pelagic stages of many rockfish strate that nearshore species show considerable special- are exposed to upwelling at the time they settle. If this ization of microhabitats (Carr 1983, 1991; Love et al. offshore advection does affect rockfish, spatial and 1991). Some deepwater species make extensive sur- temporal variation in upwelling could have important face-to-bottom migrations (Boehlert 1977); these species effects on both year-class strength and the geographical were not commonly encountered as pelagic juveniles in structure of rockfish populations. this study. Although many species clearly leave the pelagic Some evidence suggests that upwelling does have an zone for association with the benthos, the distinction advective effect on pelagic-stage rockfish. Moser and between pelagic and benthic habitat may be less clear in Boehlert (1991) noted the offshore distribution of some species such as shortbelly and chilipepper rockfish, whose Sebastes larvae, and their figures indicate relatively greater postpelagic juveniles and adults form schools that asso- offshore distributions off northern California, where sea- ciate more loosely with the bottom. Nevertheless, these ward jets are common. Simpson (1987) also illustrated species become invulnerable to midwater trawls, pre- the offshore distribution of Sebastes larvae in a filament sumably by shifting habitat. Essentially all of the species of advected water associated with an offshore eddy. covered in this study settle from the pelagic zone to more Brodeur et al. (1985) found Sebastes larvae unusually close benthic habitats that are shoreward of their pelagic dis- to shore during the El Nifio spring of 1983, but much tributions. farther offshore soon after an upwelling event later that Several aspects of the ecology of pelagic juveniles vary summer. Hobson and Howard (1989) found that mass among species. The timing and duration of parturition, strandings of juvenile shortbelly rockfish near shore in along with the duration of the pelagic stage, influence northern California were correlated with onshore trans- the timing and duration of their appearance as pelagic port, suggesting that the usual offshore distributions were juveniles in midwater trawls and their recruitment to maintained by normal offshore transport. Finally, Norton postpelagic habitats. A preliminary overview of the sea- (1987) has suggested that year-class strength of widow sonal occurrence of pelagic and newly settled juveniles rockfish is correlated with onshore transport, and Ainley of species encountered frequently in our study is pre- et al. (1993) found that year-class strength in the suite sented in table 1. Some species are taken in midwater of species found off central California (dominated by trawls for limited periods; others are taken over longer shortbelly rockfish) was affected negatively by strong up- periods of time. The peak seasonal occurrence of pelagic welling in January-February. juveniles varies by a month or more from year to year. In this paper we examine the distribution of late-stage The size of pelagic juveniles also varies among species pelagic juvenile rockfishes off central California. Our (appendix), and the relative sizes of pelagic and settled purpose is to infer the effects of upwelling on these fish individuals are concordant (comparing data in the ap- by comparing their distributions with oceanographic
Load more

Recommended publications
  • Rockfish Population Slowly on the Rise
    West Coast rockfish Rockfish population slowly on the rise Above: Rockfish in a kelp forest. Right: Black rockfish. Inset: Juvenile rockfish. More than 60 species of rockfi sh dwell in ocean perch, and canary. These species are of- schooling rockfi sh. vast numbers in the Eastern Pacifi c Ocean fi cially “overfi shed,” a designation which the When you’ve got a permit for hake, you’re from Baja to Alaska. White-fl eshed and deli- council grants when a fi sh’s population drops geared up for hake, you’re fi shing for hake, cious, they frequently school together and to 25 percent of its estimated virgin level, and and you know there is a hell of a lot of hake often intermingle with other commercially a stock is not considered “recovered” until it around, nothing stinks so much as scooping sought fi shes — but seven members of the ge- has climbed back up to the 40-percent mark. up a school of lousy rockfi sh — especially nus Sebastes have spoiled the party. These guidelines were devised and written ones protected by strict bycatch limits. Actually, it was fi shermen, who harvested into policy in 1998 as part of the Fishery Man- The fl eet may have dozens of tonnes of hake them nearly to economic extinction last centu- agement Plan. Since then, two species have as- left uncaught in the quota but must stop be- ry, and this handful of species is now largely cended back to the 40 percent level and been cause the rockfi sh cap has been exceeded.
    [Show full text]
  • Vii Fishery-At-A-Glance: California Sheephead
    Fishery-at-a-Glance: California Sheephead (Sheephead) Scientific Name: Semicossyphus pulcher Range: Sheephead range from the Gulf of California to Monterey Bay, California, although they are uncommon north of Point Conception. Habitat: Both adult and juvenile Sheephead primarily reside in kelp forest and rocky reef habitats. Size (length and weight): Male Sheephead can grow up to a length of three feet (91 centimeters) and weigh over 36 pounds (16 kilograms). Life span: The oldest Sheephead ever reported was a male at 53 years. Reproduction: As protogynous hermaphrodites, all Sheephead begin life as females, and older, larger females can develop into males. They are batch spawners, releasing eggs and sperm into the water column multiple times during their spawning season from July to September. Prey: Sheephead are generalist carnivores whose diet shifts throughout their growth. Juveniles primarily consume small invertebrates like tube-dwelling polychaetes, bryozoans and brittle stars, and adults shift to consuming larger mobile invertebrates like sea urchins. Predators: Predators of adult Sheephead include Giant Sea Bass, Soupfin Sharks and California Sea Lions. Fishery: Sheephead support both a popular recreational and a commercial fishery in southern California. Area fished: Sheephead are fished primarily south of Point Conception (Santa Barbara County) in nearshore waters around the offshore islands and along the mainland shore over rocky reefs and in kelp forests. Fishing season: Recreational anglers can fish for Sheephead from March 1through December 31 onboard boats south of Point Conception and May 1 through December 31 between Pigeon Point and Point Conception. Recreational divers and shore-based anglers can fish for Sheephead year round.
    [Show full text]
  • WCR-2018-10181 October 4, 2018
    UNITED STATES DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration NATIONAL MARINE FISHERIES SERVICE West Coast Region 1201 NE Lloyd Boulevard, Suite 1100 Portland, OR 97232 Refer to NMFS No.: WCR-2018-10181 October 4, 2018 Amy Changchien Director, Office of Planning and Program Development U.S. Department of Transportation Federal Transit Administration 915 Second Avenue Federal Bldg. Suite 3142 Seattle, Washington 98174-1002 Re: Reinitiation of Endangered Species Act Section 7(a)(2) Biological Opinion, and Magnuson-Stevens Fishery Conservation and Management Act Essential Fish Habitat Response for One Structure in Inland Marine Waters of Washington State: Annapolis Ferry Terminal Pier, Ramp, and Float Structure. Dear Ms. Changchien: Thank you for your June 6, 2018, letter requesting reinitiation of consultation with NOAA’s National Marine Fisheries Service (NMFS) pursuant to section 7 of the Endangered Species Act of 1973 (ESA) (16 U.S.C. 1531 et seq.). We also completed an essential fish habitat (EFH) consultation on the proposed action, in accordance with section 305(b)(2) of the Magnuson- Stevens Fishery Conservation and Management Act (MSA) (16 U.S.C. 1801 et seq.) and implementing regulations at 50 CFR 600. The enclosed document contains a biological opinion (opinion) that analyzes the effects of your proposal to permit the removal of one pier, ramp, float (PRF) structure and the installation of one PRF structure. In this opinion, we conclude that the proposed action is not likely to jeopardize the continued existence of Puget Sound (PS) Chinook salmon (Oncorhynchus tshawytscha), PS steelhead (O. mykiss), or PS/Georgia Basin (GB) bocaccio (Sebastes paucispinis), PS/GB yelloweye rockfish (S.
    [Show full text]
  • Rockfish Resources of the South Central California Coast
    140-155 Stephens 11/13/06 9:02 PM Page 140 STEPHENS ET AL.: ROCKFISH RESOURCES OF SOUTH CENTRAL CA CalCOFI Rep., Vol. 47, 2006 ROCKFISH RESOURCES OF THE SOUTH CENTRAL CALIFORNIA COAST: ANALYSIS OF THE RESOURCE FROM PARTYBOAT DATA, 1980–2005 JOHN STEPHENS DEAN WENDT DEBRA WILSON-VANDENBERG California Polytechnic State University California Polytechnic State University, California Department of Fish and Game San Luis Obispo and Vantuna Research Group San Luis Obispo 20 Lower Ragsdale Drive 2550 Nightshade Place 2550 Nightshade Place Monterey, California 93940 Arroyo Grande, California 93420 Arroyo Grande, California 93420 [email protected] JAY CARROLL ROYDEN NAKAMURA ERIN NAKADA Tenera Environmental, Inc. Biological Sciences Biological Sciences 141 Suburban Road, Suite A2 California Polytechnic State University California Polytechnic State University San Luis Obispo, California 93401 San Luis Obispo, California 93407 San Luis Obispo, California 93407 STEVEN RIENECKE JONO WILSON Biological Sciences Biological Sciences California Polytechnic State University California Polytechnic State University San Luis Obispo, California 93407 San Luis Obispo, California 93407 ABSTRACT including Lenarz (1987), Ralston (1998), Gunderson Rockfishes (Sebastes spp.) have historically comprised (1998), and Love et al. (1998, 2002). Rockfish are long- a large proportion of catches in the nearshore recre­ lived, slow to mature (iteroparous), and therefore sub­ ational fishery in California, but declining populations ject to pre-spawning mortality (Leaman 1991). Two of some species have led to increasingly restrictive man­ factors, overfishing and climate change, are considered agement of the resource. This report summarizes new primarily responsible for the declining marine fish pop­ and existing data on rockfishes of the south central coast ulations in much of California.
    [Show full text]
  • Validating Age Estimates for Bocaccio Rockfish with Radiometric Dating Gregor M
    FISHERIES RESEARCH & DEVELOPMENT R/F-174: 5.1.1998–5.31.1999 Validating Age Estimates for Bocaccio Rockfish with Radiometric Dating Gregor M. Cailliet California State University—Moss Landing Marine Laboratories Summary ocaccio (Sebastes An otolith is a bone-like paucispinis), also known structure in a fish’s ear, assumed to calcify in Bas red snapper, rockcod, annual layers. The grouper or salmon grouper, were the number of layers is thus a dominant rockfish in California’s proxy for a fish's age. The early longline fishery and the most otolith on top is estimated to be from a 3-year-old abundant rockfish in the bottom- bocaccio while the one on trawl fishery from Morro Bay to Fort the bottom is estimated to Bragg until the mid-1980s, accord- be from a 28-year-old. ing to a 2001 report published by the Photo: Allen Andrews. California Department of Fish and Game. Annual landings of bocaccio are now about a hundredth of what they were in the early-1970s. The National Marine Fisheries Service estimates that the stock’s spawning biomass has been reduced by about 98 percent. As with other long-lived fish, bocaccio are especially vulnerable to overexploitation: they reach sexual maturity late in life, and their methods provide similar age other species of management reproductive success rate is highly estimates. concern. Dr. Cailliet currently is variable from year to year. Another The scientists’ findings are based funded to validate age statistics for factor contributing to their decline on measurements of the ratios of the blackgill rockfish.
    [Show full text]
  • Zalophus Californianus): Insights from Molecular Scatology
    San Jose State University SJSU ScholarWorks Master's Theses Master's Theses and Graduate Research Fall 2016 Sex-specific diet and ockfishr consumption in California sea lions (Zalophus californianus): Insights from molecular scatology Keith Michael Hernandez San Jose State University Follow this and additional works at: https://scholarworks.sjsu.edu/etd_theses Recommended Citation Hernandez, Keith Michael, "Sex-specific diet and ockfishr consumption in California sea lions (Zalophus californianus): Insights from molecular scatology" (2016). Master's Theses. 4757. DOI: https://doi.org/10.31979/etd.49wc-7qbn https://scholarworks.sjsu.edu/etd_theses/4757 This Thesis is brought to you for free and open access by the Master's Theses and Graduate Research at SJSU ScholarWorks. It has been accepted for inclusion in Master's Theses by an authorized administrator of SJSU ScholarWorks. For more information, please contact [email protected]. SEX-SPECIFIC DIET AND ROCKFISH CONSUMPTION IN CALIFORNIA SEA LIONS ( ZALOPHUS CALIFORNIANUS ): INSIGHTS FROM MOLECULAR SCATOLOGY A Thesis Presented to The Faculty of Moss Landing Marine Laboratories San José State University In Partial Fulfillment of the Requirements for the Degree Master of Science by Keith M. Hernandez December 2016 © 2016 Keith Michael Hernandez ALL RIGHTS RESERVED The Designated Thesis Committee Approves the Thesis Titled SEX-SPECIFIC DIET AND ROCKFISH CONSUMPTION IN CALIFORNIA SEA LIONS ( ZALOPHUS CALIFORNIANUS ): INSIGHTS FROM MOLECULAR SCATOLOGY by Keith M. Hernandez APPROVED FOR THE DEPARTMENT OF MARINE SCIENCE SAN JOSÉ STATE UNIVERSITY December 2016 Dr. James T. Harvey Moss Landing Marine Laboratories Dr. Jonathan B. Geller Moss Landing Marine Laboratories Dr. John Carlos Garza National Oceanic and Atmospheric Administration, Southwest Fisheries Science Center ABSTRACT SEX-SPECIFIC DIET AND ROCKFISH CONSUMPTION IN CALIFORNIA SEA LIONS ( ZALOPHUS CALIFORNIANUS ): INSIGHTS FROM MOLECULAR SCATOLOGY By Keith M.
    [Show full text]
  • Appendix B Species Biology
    APPENDIX B SPECIES BIOLOGY Appendix B SPECIES BIOLOGY Species covered in this Biological Assessment Reference were chosen on the basis of species lists obtained from the National Marine Fisheries Service (NMFS) and the U.S. Fish and Wildlife Service (USFWS) (see Appendix C). Because of the inland marine nature of all the Washington State Ferries (WSF) terminals, freshwater fish, oceangoing mammals, and sea turtles (including leatherback sea turtles), terrestrial species, and upland and freshwater plants were excluded from this analysis. NMFS – Listed Threatened, Endangered, and Proposed Species Puget Sound Chinook Salmon (Oncorhynchus tshawytscha) Status Puget Sound Chinook salmon were listed as threatened on August 2, 1999 (Federal Register 1999a.). The evolutionarily significant unit (ESU) includes naturally spawned fish and stocks from 26 artificial propagation programs. Critical Habitat Critical habitat was designated for Puget Sound Chinook salmon on February 16, 2000 (Federal Register 2000.). Critical habitat is designated for areas containing the physical and biological habitat features, or primary constituent elements (PCEs) essential for the conservation of the species or which require special management considerations. PCEs include sites that are essential to supporting one or more life stages of the ESU and that contain physical or biological features essential to the conservation of the ESU. Specific sites and features designated for Puget Sound Chinook salmon include the following: 1. Freshwater spawning sites with water quantity and quality conditions and substrate supporting spawning incubation and larval development 2. Freshwater rearing sites with water quantity and floodplain connectivity to form and maintain physical habitat conditions and support juvenile growth and mobility; water quality and forage supporting juvenile development; and natural cover such as shade, submerged and overhanging large wood, log jams and beaver dams, aquatic vegetation, large rocks and boulders, side channels, and undercut banks 3.
    [Show full text]
  • NOAA/NWFSC Southern California Shelf Rockfish Hook and Line Survey
    NOAA/NWFSC Southern California Shelf Rockfish Hook and Line Survey NOAA Fisheries, Northwest Fisheries Science Center 2725 Montlake Blvd. E, Seattle, WA 98112 John Harms, NOAA/NWFSC Jim Benante, PSMFC/NWFSC Matt Barnhart, PSMFC/NWFSC Rationale • Prior to 2002, there was no ongoing fishery- independent groundfish data collection for the area from Pt. Conception (34 27΄ N) to the Mexican border) • Trawl survey coverage for the region began in 2002; however, untrawlable areas including rocky, high-relief habitats remained unsampled Survey Region: Southern California Bight Primary Objective Develop an annual index of abundance and time series of other biological parameters for key species of structure-associated shelf rockfish (Genus: Sebastes) within the Southern California Bight including bocaccio, vermilion rockfish, sunset rockfish, greenspotted rockfish, and others. Background • Initial planning: Summer 2002 – Meetings between NOAA Fisheries researchers and representatives from the sportfishing and commercial fishing industry • Pilot survey: May 2003 – Research conducted aboard vessels chartered from both the sportfishing and commercial industries • Survey has been conducted annually since 2004 – 2011 will be the 8th year in the data time series Survey Design • Conducted annually • 121 fixed stations sampled during the course of the survey • Sampling area: Pt. Arguello to the boundary with Mexican waters • Depth range: 40m – 230m (common depth range for bocaccio) • Sampling frame developed through meetings with the local sport and commercial fishermen; previous groundfish monitoring programs conducted by California Dept. of Fish and Game; and stations sampled opportunistically during the 2003 pilot study Survey Stations Point Conception Santa Barbara Santa Barbara Channel Point Hueneme San Harrison Reef Miguel Is.
    [Show full text]
  • Summarized History of Oregon Marine Sport Fishing Regulations
    Summarized History of Oregon Marine Sport Fishing Regulations - Page 1 of 16 Groundfish, Offshore Pelagic Species, and Nongame Fish Last saved on 7/27/21 ** NOT ALL REGULATIONS AND DETAILS ARE SHOWN ** Year Effective Jan. 1 (i.e., regulations set preseason) Inseason Change and Effective Date 2021 General marine species: 5-fish 6-fish daily bag limit. 5/10 Daily bag limit is 5 general marine China, copper and quillback rockfishes combined: 1 fish sub- bag limit. species. Cabezon open July 1 – Dec. 31, 1 fish sub-bag limit (of the 5 6 6/1 China, copper and general marine species bag limit), 16” min. quillback rockfishes: Ocean closed seaward of the 40-fathom curve June 1 – Aug. retention prohibited 31. by boats. ________________________________________ Offshore Longleader Fishery: Open outside of the 40-fathom line all year. 10-fish limit. Only these species may be retained: yellowtail, widow, canary, redstripe, greenstriped, silvergray chilipepper, bocaccio, blue and deacon rockfish. Offshore longleader trips cannot be combined with traditional bottomfish, flatfish, or halibut trips except When the bottomfish fishery is restricted to inside of 40- fathoms (June-Aug in 2021) an offshore longleader trip may be combined with all-depth Pacific halibut. However, once rockfish are onboard the vessel, no further halibut fishing may occur. Flatfish Fishery: Open at all depths all year. Daily bag limit: 25 ________________________________________ Retention of yelloweye rockfish is prohibited. Descending devices are mandatory: Any vessel fishing for, or possessing, bottomfish (aka groundfish), including flatfish, or Pacific halibut in the ocean must have a functional descending device onboard, and use it on any rockfish released outside of 30 fathoms.
    [Show full text]
  • US West Coast Rockfish Complex, Cabezon, Kelp Greenling
    US West Coast rockfish complex, Cabezon, Kelp Greenling Sebastes spp. and Sebastolobus spp., Scorpaenichthysm armoratus, Hexagrammosdeca grammus Image ©Monterey Bay Aquarium US West Coast Groundfish Fishery (excluding the Pacific hake fishery) Bottom trawl, Midwater trawl, Handline, Bottom longline July 17, 2014 John Driscoll, Consulting researcher 2 About Seafood Watch® The Monterey Bay Aquarium Seafood Watch® program evaluates the ecological sustainability of wild-caught and farmed seafood commonly found in the North American marketplace. Seafood Watch defines sustainable seafood as originating from sources, whether wild-caught or farmed, which can maintain or increase production in the long-term without jeopardizing the structure or function of affected ecosystems. The program’s mission is to engage and empower consumers and businesses to purchase environmentally responsible seafood fished or farmed in ways that minimize their impact on the environment or are in a credible improvement project with the same goal. Each sustainability recommendation is supported by a seafood report. Each report synthesizes and analyzes the most current ecological, fisheries and ecosystem science on a species, then evaluates this information against the program’s sustainability criteria to arrive at a recommendation of “Best Choice,” “Good Alternative,” or “Avoid.” In producing the seafood reports, Seafood Watch utilizes research published in academic, peer-reviewed journals whenever possible. Other sources of information include government technical publications,
    [Show full text]
  • Sebastes Paucispinis) to About 7.4% of Its Former Unfished Population
    383 Abstrac t —Although bocaccio (Se- Potential use of offshore marine structures bastes paucispinis) was an economi- cally important rockfish species along in rebuilding an overfished rockfish species, the west coast of North America, overfishing has reduced the stock bocaccio (Sebastes paucispinis) to about 7.4% of its former unfished population. In 2003, using a manned Milton S. Love1 research submersible, we conducted fish surveys around eight oil and gas Donna M. Schroeder1 platforms off southern California as William Lenarz2 part of an assessment of the potential 3 value of these structures as fish habi- Alec MacCall tat. From these surveys, we estimated Ann Scarborough Bull4 that there was a minimum of 430,000 Lyman Thorsteinson5 juvenile bocaccio at these eight struc- tures. We determined this number to 1 Marine Science Institute, University of California be about 20% of the average number Santa Barbara, California, 93160 of juvenile bocaccio that survive annu- E-mail address (for M. S. Love: [email protected] ally for the geographic range of the 2 P.O. 251 species. When these juveniles become Kentfield, California 94914 adults, they will contribute about one percent (0.8%) of the additional 3 NOAA/NMFS Santa Cruz Laboratory amount of fish needed to rebuild the Santa Cruz, California 95060 Pacific Coast population. By compari- 4 U.S. Minerals Management Service son, juvenile bocaccio recruitment to 770 Paseo Camarillo nearshore natural nursery grounds, Camarillo, California 93010 as determined through regional scuba surveys, was low in the same year. 5 Western Fisheries Research Center This research demonstrates that a U.S.
    [Show full text]
  • View the Complete Recommendations List
    This document and all information included within it have been produced by the Seafood Watch® program, which is owned and operated by the Monterey Bay Aquarium. The Aquarium holds a registered trademark on the name Seafood Watch. All research, findings, conclusions, ratings, opinions, and analyses produced by the Seafood Watch program—including those appearing within this document—are protected by federal copyright law. All such information is and remains the exclusive property of the Monterey Bay Aquarium. The Aquarium disseminates research, ratings, and other information produced by Seafood Watch to a variety of industry partners. The Aquarium thereby grants to recipients a limited, nontransferable license to possess and use both the Aquarium’s Seafood Watch trademark and its copyright ed material only for internal uses preappro ved in writing by the Aquarium. The Aquarium reserves the right to revoke these licenses at any time and/or to require recipients to sign a written lice nsing agreement on terms defined by the Aquarium. By grantin g these lice nses, the Aquarium does not waive any protections afforded by federal or state intellectual property law. Recipients may use the Aquarium's Seafood Watch materials only in a manner consistent with feder al intellectual property law: o Recipients must advise third parties that Seafood Watch is a registered trademark of the Aquarium that may not be used without the Aquarium's consent. Any use of the Aquarium’s trademark on any printed or digital material—including, but not limited to, on websites and in social media—must include the foll owing statement in a prominent location, in no less than 10-point type: “Seafood Watch is a registered trademark of the Monterey Bay Aquarium.” o Recipients must also include an appropriate copyright notice – e.g., “© 2020, Monterey Bay Aquarium” – on any print or digital reproduction or further dissemination of any Seafood Watch materials.
    [Show full text]