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... A particularly concerning outcome of environmental pollution is the disturbance of reproductive processes. However, studies on the impacts of pollution on the reproductive health of fish inhabiting South American environments are limited. We studied the impact of anthropogenic pollution on the reproductive health of two sympatric Patagonian marine fish species with different reproductive strategie ...
... Rockfish (genus Sebastes) assemblages can inform mechanisms of coexistence and maintenance of diversity in ecological communities. Coexistence theory characterizes ecological assemblages as following either a deterministic niche differentiation model, or a stochastic lottery model. We used natural abundances of carbon and nitrogen stable isotopes from the tissues of ten co-occurring species of roc ...
... The features of distribution and catch in the Barents Sea of the golden redfish Sebastes norwegicus associated with changes in its size composition have been considered. It has been shown that juveniles and immature individuals are found in this region in a larger water area than medium-sized and large fish. The factor limiting the distance of migrations of adult golden redfish from the areas of s ...
... Over a decade ago, ocean acidification (OA) exposure was reported to induce otolith overgrowth in teleost fish. This phenomenon was subsequently confirmed in multiple species; however, the underlying physiological causes remain unknown. Here, we report that splitnose rockfish (Sebastes diploproa) exposed to ~1600 μatm pCO₂(pH ~7.5) were able to fully regulated the pH of both blood and endolymph (t ...
... In this study, a multispecies gadget model (GadCap) simulating the interactions among the Flemish Cap cod (Gadus morhua), redfish (Sebastes spp.), and shrimp (Pandalus borealis) has been incorporated as the operating model in a management strategy evaluation (MSE) framework (a4a-FLR) to test the performance of multiple combinations of harvest control rules (HCRs) for the three stocks when recruitm ...
Gadus morhua; Sebastes; fisheries; haddock; Barents Sea
Abstract:
... In many trawl fisheries, codend size selectivity is supplemented by adding selection devices to the gear. In the Barents Sea gadoid fishery, combining diamond mesh codends with sorting grids is compulsory. However, the use of grids increases the costs and complexity of the gear, causing discontent among fishermen and prompting researchers to seek alternative solutions. Lastridge ropes are ropes at ...
Kristine Cerbule; Nadine Jacques; Hermann Pettersen; Ólafur A. Ingólfsson; Bent Herrmann; Eduardo Grimaldo; Roger B. Larsen; Jesse Brinkhof; Manu Sistiaga; Dagfinn Lilleng; Jure Brčić
... In the Northeast Atlantic deep-water shrimp (Pandalus borealis) trawl fishery, the bycatch of juvenile fish and shrimp represents a problem. This study evaluated if inserting a 200 mm mesh size top-panel in the last three sections of the tapered upper belly section of the trawl could reduce bycatch of juveniles while maintaining the catch efficiency for deep-water shrimp. The bycatch species inves ...
Oregon; Sebastes; age structure; growth models; population dynamics; rockfish
Abstract:
... Understanding the basic biology of exploited fish populations, and how it changes across the waterscape, is essential to sustainable management. Biological features (age, growth, reproductive investment, and fish condition) for the newly described Deacon Rockfish Sebastes diaconus were evaluated between two different population segments, an exploited nearshore population and an unexploited offshor ...
... We combined a high-resolution acoustic telemetry array with presence/absence receivers to conduct a preliminary study of the seasonal movements, activity patterns, and habitat associations of the newly described Deacon Rockfish (Sebastes diaconus). Eleven mature female Deacon Rockfish were tagged and monitored during an 11-month period, at a nearshore rocky reef off Seal Rock, Oregon, USA, an area ...
DNA barcoding; Sebastes; barcoding; conservation genetics; environmental DNA; environmental monitoring; mitochondria; oligodeoxyribonucleotides; rockfish; sequence homology; California
Abstract:
... Environmental DNA (eDNA) is a promising biomonitoring tool for marine ecosystems, but its effectiveness for North Pacific coastal fishes is limited by the inability of existing barcoding primers to differentiate among rockfishes in the genus Sebastes. Comprised of 110 commercially and ecologically important species, this recent radiation is exceptionally speciose, and exhibits high sequence simila ...
... Distribution and abundance of common parasitic nematodes in marine fishes is not well documented in many geographic regions. Understanding the influence of large-scale environmental changes on infection rates of fish by nematodes requires quantitative assessments of parasite abundance for multiple host species. We collected samples of two species of cod and eight species of rockfish (total of 232 ...
... Otolith (sagitta) morphology is described in six tropical fish species belonged to different genera of the suborder Scorpaenoidei: Synanceia horrida, Inimicus sinensis, Parascorpaena picta, Sebastapistes cyanostigma, Scorpaenopsis papuensis, and Dendrochirus zebra. Based on otolith shape (six shape indices and elliptic Fourier analysis), S. horrida is similar to Sc. papuensis and I. sinensis is si ...
... Two species, light dusky rockfish Sebastes variabilis (Pallas) and lesser prickleback Alectridium aurantiacum Gilbert et Burke, rare in the western Bering Sea were found in this area in the summer of 2017–2018. S. variabilis was recorded at three stations between capes Olyutorsky and Navarin at the depths of 130–353 m, A. aurantiacum, far to the north beyond the known range, for the first time, in ...
Sebastes; age structure; color; life history; oocytes; parturition; rockfish; spatial variation; spring; surveys; temperature; time series analysis; Alaska; Gulf of Alaska
Abstract:
... Many rockfish (genus Sebastes) species within multispecies complexes have lacked basic biological data hindering their fisheries management. In this study, we provide essential information for stock assessment decision making for one of these species, Harlequin Rockfish Sebastes variegatus. We analyzed aspects of reproduction, size structure, and growth of Harlequin Rockfish in waters off Alaska u ...
Sebastes; genetic variation; microsatellite repeats; population structure; rockfish; sport fishing
Abstract:
... The white-edged rockfish Sebastes taczanowskii Steindachner, 1880 is a marine viviparous teleost, which plays a substantial role in the functioning of subtidal fish communities and is an important recreational fishery species [2]. The biology of S. taczanowskii has been well studied; however, there is no information about the population structure of the species. The aim of our study was to evaluat ...
... The goldeye rockfish, Sebastes thompsoni (Jordan et Hubbs, 1925), is known as a typical cold-water species, occurring from southern Hokkaido to Kagoshima. In the presently reported study, a specimen was collected from the local fishery catch off Keelung, northern Taiwan, which represents the first specimen-based record of the genus in Taiwan. Moreover, the new record of Sebastes thompsoni in Taiwa ...
... A novel pathogen was documented after two wild‐caught, juvenile, splitnose rockfish presented with buphthalmia, grey corneal endothelial plaques and evidence of uveitis. Cytologic evaluation of ocular contents revealed fungal hyphae. Histologic evaluation identified multiple fungal granulomas and granulomatous inflammation in the globes, periocular tissue and heart. Fungi were slender, hyphenated ...
Helicolenus; Neosebastes; Scorpaena; Sebastes; autumn; females; histology; life history; otoliths; perch; photoperiod; reproductive performance; sexual dimorphism; water temperature; Indian Ocean; Western Australia
Abstract:
... Scorpaeniformes are an important component of commercial and recreational fisheries world‐wide. The Neosebastes species, found in the western Pacific and south‐east Indian Ocean, have received little attention from a research perspective. Samples of the bighead gurnard perch, Neosebastes pandus, collected from the lower west and south coasts of Western Australia, were used to undertake the first c ...
Sebastes; marine pollution; noise pollution; rockfish; British Columbia
Abstract:
... Underwater noise pollution is a recognized threat to marine life. In British Columbia, Canada, Pacific rockfish (Sebastes spp.) were historically overfished, prompting the establishment of Rockfish Conservation Areas (RCAs). However, there are no restrictions prohibiting vessel transits in RCAs. We hypothesized that RCAs do not protect rockfish from sub-lethal harm from noise. We compared noise le ...
... Acoustic scattering layers (SL) at various depths are common phenomena in most oceans, but the organisms that make up these layers vary and so does their density, and hence the backscattered energy. During two crossings of the deep Fram Strait between the shelves at Svalbard and Northeast Greenland at latitudes 77°N and 79°N, we registered epipelagic and mesopelagic SL across the entire Fram Strai ...
Bayesian theory; Hippoglossus stenolepis; Markov chain; Monte Carlo method; Scorpaenidae; Sebastes; Sebastolobus alascanus; age determination; bioavailability; carbon radioisotopes; models; otoliths; rockfish; Gulf of Alaska
Abstract:
... In rockfish (Family Scorpaenidae), age determination is difficult and the annual nature of otolith growth zones must be validated independently. We applied routine age determination to four species of Gulf of Alaska rockfish: two shallower-water species, namely harlequin rockfish (Sebastes variegatus) and redstripe rockfish (Sebastes proriger), and two deep-water species, namely shortspine thornyh ...
Sebastes; coasts; color; copulation; foraging; growth curves; models; ontogeny; otoliths; parturition; predation; predator-prey relationships; risk; rockfish; species richness; swimming; China
Abstract:
... The live-bearing genus Sebastes is renowned for its outstanding species richness and color diversity, and its speciation has been a point of interest. This study investigated the age, growth, reproductive biology, color pattern and ontogenetic divergence of a pair of closely related rockfishes from the coasts of the Shandong Peninsula, namely, Sebastes koreanus (n=879) and S. nudus (n=257). Margin ...
Sebastes; coasts; demersal fish; fisheries; models; oceans; rockfish; spawning; California
Abstract:
... We outline a new flexible method for estimating maturity that incorporates skip spawning, which can lead to non-asymptotic behavior in the population maturity schedule. This new approach aids fisheries managers who seek to understand marine species’ responses to changing oceans. In an effort to assess shifts in maturity and spawning behavior of west coast groundfish, we used this new method to eva ...
Gadus morhua; Melanogrammus; Sebastes; aquacultural and fisheries equipment; fisheries; haddock
Abstract:
... In the North-East Atlantic demersal trawl fishery targeting cod and haddock, the interest on fishing gear designs that preserve fish quality and welfare has grown. However, the gear configurations tested so far imply practical challenges, therefore, more user-friendly designs are still sought by the industry. For a new design to be considered, it needs to have size selective properties that are at ...
Delphinapterus leucas; Polychaeta; Sebastes; adults; community structure; diet; ecosystems; estuaries; fish; population dynamics; prey species; squid; stomach; summer
Abstract:
... Ecosystems and community structure fluctuate over time as a result of natural and anthropogenic factors that may affect prey availability and population dynamics. Most of what we know about St. Lawrence Estuary (SLE) Beluga (Delphinapterus leucas) diet comes from stomach contents collected 80 years ago mainly from a hunting site that Beluga no longer use. How reflective these data are of Beluga di ...
... Genome size—the total haploid content of nuclear DNA— is constant in all cells in individuals within a species, but differs among species. Consequently, the genome size is a quantifiable genetic signature that not only characterizes a species, but it can reflect chromatin modifications, which play fundamental roles in most biological processes that are involved in the manipulation and expression o ...
Ophiodon elongatus; Sebastes; bedrock; cameras; habitats; probability; rockfish; solar radiation; species diversity; surveys; California
Abstract:
... The increasing use of underwater cameras to estimate fish abundance often does not account for the behavior of target species. These behaviors can affect detectability of fish and bias density estimates. This study estimated abundance and behavior of several rockfishes (Sebastes spp.) and lingcod (Ophiodon elongatus) at Footprint Bank, a small offshore bank using images from randomly deployed stat ...
... There are increasing global concerns of the alarming pollution impacts on marine life, thus it is becoming essential to generate reliable tools to monitor and understand the effects of these impacts on aquatic organisms. We performed a field study assessing how exposure to anthropogenic pollution impacts immunological and health-state parameters and parasite infection of a wild marine fish, the Br ...
... Fisheries scientists use biological models to determine sustainable fishing rates and forecast future dynamics. These models require both life‐history parameters (mortality, maturity, growth) and stock‐recruit parameters (juvenile production). However, there has been little research to simultaneously predict life‐history and stock‐recruit parameters. I develop the first data‐integrated life‐histor ...
Sebastes; phenotype; polymerase chain reaction; restriction fragment length polymorphism; rockfish; sex determination
Abstract:
... The phenotypic identification of sex in Sebastes rockfish is difficult and often impractical from a management perspective, and the genetic basis of sex determination in the genus is currently uncertain. We tested a previously developed sex identification polymerase chain reaction restriction fragment length polymorphism (PCR–RFLP) assay in eight species of Sebastes rockfish. Results indicated tha ...
... Gonadal structure, cytological condition of oocytes, ultrastructure of egg envelope, and spermatozoa morphology are studied in the individuals of Inimicus sinensis 120–230 mm TL with the gonads mainly at maturity stage IV. The males possess hypertrophied urinary bladders. Based on oocytes’ size distribution in the ovaries, the oogenesis is continuous and the spawning is multiple. Oocytes of the ma ...
Leptocottus armatus; Pholis; Sebastes; Zostera marina; climatic factors; coasts; community structure; demersal fish; estuaries; fish communities; habitats; juveniles; life history; marine fish; monitoring; rockfish; salinity; temperature; temporal variation; Oregon
Abstract:
... The role that west coast estuarine habitats play in the early life history of many nearshore marine fishes is poorly understood, in part due to the limited temporal sampling of estuarine habitats. To begin to understand this role, we compared the juvenile demersal fish community between two habitat types at a marine-dominated estuary on the northeast Pacific coast and examined how community struct ...
Sebastes; adults; juveniles; life history; microstructure; otoliths; rockfish; Pacific Ocean
Abstract:
... Growth is key to the survival of fishes during their early life and ultimately affects annual recruitment to adult populations. To evaluate early life history traits of two commercially harvested fishes, splitnose (Sebastes diploproa) and redbanded (S. babcocki) rockfishes, we examined the otolith microstructure of juveniles of both species that settled simultaneously in an unusually large settlem ...
Gadus macrocephalus; Sebastes; corals; ecosystems; habitats; marine fish; rockfish
Abstract:
... The role of deep-sea coral and sponge ecosystems as habitat for marine fishes has been widely studied, with many finding significant associations, especially for rockfishes. However, rockfishes also thrive in areas largely devoid of corals and sponges. We compared the use of deep-sea corals and sponges by fish species in two ecosystems. Rockfishes (Sebastes spp.) and Pacific cod (Gadus macrocephal ...
... The Nordmøre grid is the principle bycatch mitigation device in many shrimp trawl fisheries. However, in several of these fisheries, bycatch is a problem because small sized fish can pass through the grid and enter the codend together with the targeted shrimp. One such fishery is the Northeast Atlantic deep-water shrimp (Pandalus borealis) fishery, where the use of a Nordmøre grid is mandatory. In ...
Sebastes; fish; fisheries; fishery resources; maximum residue limits; Iceland
Abstract:
... The size selectivity and usability of two diamond mesh codends, a traditional two-panel codend versus an experimental four-panel ultra-cross knotless mesh codend, were compared using the covered codend method in the Iceland redfish (Sebastes norvegicus and S. viviparous) fishery. Results showed that there was no significant difference in size selectivity between the codends at lengths greater than ...
Sebastes; artificial reefs; coasts; community structure; conservation areas; demersal fish; fish communities; habitat destruction; habitats; reefs; risk; rockfish; sonar; species richness; surveys; threatened species; British Columbia
Abstract:
... Human-made marine habitats such as artificial reefs are used to mitigate marine habitat degradation and aid conservation of species at risk. We used ROV and sonar to survey threatened rockfish (Sebastes spp.) and other groundfish species associated with 18 artificial and natural reefs along the south coast of BC, Canada. Using an information-theoretic approach, we found that community composition ...
... Marine species with pelagic larvae typically exhibit little population structure, suggesting long‐distance dispersal and high gene flow. Directly quantifying dispersal of marine fishes is challenging but important, particularly for the design of marine protected areas (MPAs). Here, we studied kelp rockfish (Sebastes atrovirens) sampled along ~25 km of coastline in a boundary current‐dominated ecos ...
Sebastes; coasts; fisheries; fishermen; fishing boats; mortality; research projects; rockfish; sport fishing; surveys; California
Abstract:
... Fishes caught from depth often suffer from barotrauma, which can result in high mortality rates (close to 100% for some species) when released at the surface. To mitigate for this, the recreational fishing community pro-actively developed several different types of descending devices designed to assist unwanted or prohibited fish back toward the bottom for release. Post-release survival using reco ...
... Methylmercury (MeHg) is a potent neurotoxin that bioaccumulates in seafood. Co-occurrence of selenium (Se) may affect the bioavailability and toxicity of MeHg in organisms. Here we report the concentrations of total mercury (Hg) and Se in 17 teleost fish species (n = 8459) sampled during 2006–2015 from the North East Atlantic Ocean (NEAO) and evaluate species variation and effects of geography. Me ...
Sebastes; case studies; coasts; demersal fish; ecosystems; fisheries; models; risk; rockfish; uncertainty; Pacific Ocean; United States
Abstract:
... The Beverton-Holt stock-recruitment (SR) relationship has typically been reparameterized such that a single parameter, “steepness,” can be used to define recruitment compensation along a common scale. However, “steepness” is notoriously difficult to estimate in stock assessment models, particularly for the integrated analysis models used to assess groundfish stocks along the U.S. West Coast, due i ...
Andrew R. Thompson; Chris J. Harvey; William J. Sydeman; Caren Barceló; Steven J. Bograd; Richard D. Brodeur; Jerome Fiechter; John C. Field; Newell Garfield; Thomas P. Good; Elliott L. Hazen; Mary E. Hunsicker; Kym Jacobson; Michael G. Jacox; Andrew Leising; Joshua Lindsay; Sharon R. Melin; Jarrod A. Santora; Isaac D. Schroeder; Julie A. Thayer; Brian K. Wells; Gregory D. Williams
El Nino; La Nina; Sebastes; Zalophus californianus; adults; autumn; climate; community structure; diet; environmental indicators; fish communities; fisheries management; forage; forage fish; marine ecosystems; niches; predators; rockfish; temporal variation; California; Oregon; Pacific Ocean
Abstract:
... Forage fishes are ecologically and economically important in marine ecosystems worldwide and thus are a focal topic for ecosystem-based fisheries management. In the California Current Large Marine Ecosystem (CCLME), the community dynamics of forage populations have been studied at regional spatial scales, but not across regions. To evaluate indicators of the forage community at the ecosystem-wide ...
... There are many methods available for estimating the current abundance of fish species. Design-based estimators, which assume random sampling within the sampling domain, have conventionally been used to provide relative indices of abundance. More recently, the use of spatiotemporal models has increased because of their ability to explicitly account for spatial heterogeneity and higher precision rel ...
... The cesium depuration mechanisms were studied in Japanese rockfish Sebastes cheni off Fukushima, in which the radiocesium level remains higher than in other teleost. Samples were collected approximately 5 km south from the nuclear power plant during 2014–2016, and the 137Cs concentrations in fish, stomach content and prey species were measured. The stable cesium content in fish was also analyzed a ...
... Diverse habitats composing coastal seascapes occur in close proximity, connected by the flux of materials and fauna across habitat boundaries. Understanding how seascape connectivity alters important ecosystem functions for fish, however, is not well established. For a seagrass‐dominant seascape, we predicted that configuration and composition of adjacent habitats would alter habitat access for fa ...
Hirudinea; Sebastes; aquariums; bacteriome; coasts; ganglia; histology; male reproductive system; new species; ocelli; rockfish; tanks; California
Abstract:
... Ostreobdella californiana n. sp. is described from rockfishes in the genus Sebastes in public display tanks in the Steinhart Aquarium, California Academy of Sciences, San Francisco, California, U.S.A., and in the Bodega Marine Laboratory, University of California, Davis, Bodega Bay, California. New species justification was based on external morphology, histology, and molecular sequence data. Leec ...
... An ichthyofaunal list of bycatch species was compiled, the fish captured by bottom gill-nets set at approximately 300 m depth in the Uraga Suido Channel central Japan. Fragmentary ichthyofaunal lists are available for this area; these lists have focused on chondrichthyans or commercial actinopterygians, but voucher specimens have not been prepared for museum storage. An initial list of the fish fa ...
... Theoretical and applied research suggests that survival rates during early life stages will increase when spawning biomass is reduced in marine fishes (termed “recruitment compensation”). However, the magnitude of recruitment compensation is generally difficult to estimate for individual fish stocks, and its average value for marine fishes remains highly contested. Scientists and managers for Paci ...
Sebastes; coasts; hybridization; lectotypes; nose; skull; Japan; Korean Peninsula
Abstract:
... A taxonomic review of the Sebastes vulpes complex (S. vulpes, S. zonatus and S. ijimae) established the existence of two valid species, Sebastes vulpes Döderlein in Steindachner and Döderlein 1884 and Sebastes zonatus Chen and Barsukov 1976, despite evidence of hybridization between them. Similarities between the species include the following: top of cranium armed with robust nasal, preocular, pos ...
Gadus morhua; Hippoglossoides platessoides; Melanogrammus aeglefinus; Pandalus borealis; Sebastes; bycatch; haddock; juveniles; probability; shrimp; shrimp fisheries; Arctic region
Abstract:
... The Nordmøre grid is regarded as an efficient bycatch-reducing device and is used in various shrimp trawl fisheries globally. However, in some shrimp fisheries, bycatch remains a problem that seriously impacts commercial trawl activities. This study tested and compared the performance of two versions of the Nordmøre grid in the northeast Arctic deepwater (northern) shrimp (Pandalus borealis) fishe ...