geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Summary report for the Inshore Rockfish (Sebastes spp.) Longline Survey Conducted in Statistical Areas 12 and 13, August 24-September 10, 2004


, : Summary report for the Inshore Rockfish (Sebastes spp.) Longline Survey Conducted in Statistical Areas 12 and 13, August 24-September 10, 2004. Canadian Technical Report of Fisheries and Aquatic Sciences 2627: I-IX,1-65

The second consecutive, annual longline survey, was conducted during the late summer, 2004, in Statistical Areas 12 and 13. The purpose of the survey is to collect catch rate and biological data to improve stock monitoring and assessment of inshore rockfishes (Sebastes caurinus, S. maliger, S. nigrocinctus, and S. ruberrimus). The depth-stratified random design targeted rocky habitat in water depths of 41 - 100m. A total of 14 rockfish and 17 other fish species were caught on the survey. Quillback rockfish (S. maliger) and yelloweye rockfish (S. ruberrimus) were the most frequently encountered rockfish species, with 420 and 146 fish caught, respectively.Quillback rockfish catch rates did not differ significantly between statistical areas, but catch rates from the deep stratum were significantly higher than those from the shallow stratum. Yelloweye rockfish catch rates did not differ significantly between depth strata, but catch rates from SA 13 were more than double the catch rates from SA 12.Several observed trends were consistent in both the 2003 and 2004 surveys, including similar species composition and catch rates. Inter-annual variation in mean catch rates was low for most species and no significant differences in catch rates were found between years for the ten most frequently encountered species on the surveys. Other between-year similarities included higher rockfish species diversity in SA 12 than in SA 13, larger quillback rockfish and older yelloweye rockfish in the deep stratum, larger quillback and yelloweye rockfish in SA 12, and higher yelloweye rockfish catch rates in SA 13.A simulation model was used to assess the suitability of the survey's catch rate data to track trends in rockfish populations. The survey's ability to track relative abundance improved in 2004 despite the smaller sample size. This was due to a lower proportion of sets with zero rockfish catch, and lower coefficients of variation for the non-zero sets, results which may have stemmed from an unproved ability to target rockfish habitat in 2004. Simulation results, using combined 2003 and 2004 data, indicate that a minimum of 7 years of survey data are needed to accurately track population trends for quillback and yelloweye rockfishes.

US$29.90


Other references

Gordon, David A., 1994: Lingcod fishery and fishery monitoring in southeast Alaska. Alaska Fishery Research Bulletin. Winter; 12: 140-152

Anonymous, 1984: Chayanov, peasants, and economic anthropology. The book provides a collection of studies centred on the work of the Russian agricultural economist, A.V. Chayanov. The studies provide theoretical reflections on his work, together with detailed ethnographic treatments of peasant economies from b...

Vranckx, R.; Plas, C.; Ali, M.; Martin, M.E.; Nunez, E.A., 1985: Rat corticosteroid-binding globulin (CBG) biosynthesis by fetal hepatocytes in culture. The ability of fetal liver to synthesize and secrete corticosteroid-binding globulin (CBG) was investigated using primary cultures of hepatocytes transplanted from 15- and 18-day-old rat fetuses. Analysis of culture medium, after labelling with [1...

Lucas Spencer G.; Tanner Lawrence H., 2006: Fossil vertebrates and the position of the Triassic-Jurassic boundary. Journal of Vertebrate Paleontology 26(3, Suppl

Zhang, R.; Zhou, L.; Zhang, B.Z., 1993: The stimulatory effect of dorsal vagal complex injection of pentagastrin on gastric motility in rats. Changes in antral motility induced by pentagastrin (G5) microinjected into the dorsal vagal complex (DVC) were investigated in fasting conscious rats. Antral motility was monitored by using chronically implanted force transducer sutured to the ant...

Hauser, T., P.; Shim, S.-In, 2007: Survival and flowering of hybrids between cultivated and wild carrots (Daucus carota) in Danish grasslands. Many crop species are able to hybridize with related weedy or wild relatives, which could lead to transfer of cultivar genes, and among them transgenes, into wild populations. It is not clear, however, whether the hybrids and their descendants are...

Rosen, E.B.; Ko, E.; Wolden, S.; Huryn, J.M.; Estilo, C.L., 2016: Intraoral angiosarcoma: treatment with a brachytherapy prosthesis. Angiosarcomas are rare, malignant neoplasms of vascular origin that account for less than 1% of all soft tissue tumors. Angiosarcomas of the oral cavity are especially rare, and brachytherapy may be prescribed as a localized treatment to manage th...

Pettingale, K.W.; Merrett, T.G.; Tee, D.E., 1977: Prognostic value of serum levels of immunoglobulins (IgG, IgA, IgM and IgE) in breast cancer: a preliminary study. One hundred and sixty women admitted for breast tumour biopsy to the King's College Hospital group have been followed sequentially for 2 years. Sixty-nine women had early operable breast cancer and 91 had benign breast disease. All these wome...

Holland, R.E.; Wilson, R.A.; Holland, M.S.; Yuzbasiyan Gurkan, V.; Mullaney, T.P.; White, D.G., 1999: Characterization of eae+ Escherichia coli isolated from healthy and diarrheic calves. Strains of Escherichia coli from 101 healthy and 114 diarrheic calves were screened by PCR for the eae (intimin) gene and Shiga toxin genes (stx). Each eae+ and eae/stx+ strain was examined for antimicrobial susceptibility, enterohemolysin activit...

Shea K.J.; Kim J S., 1992: Influence of strain on chemical reactivity relative reactivity of torsionally distorted double bonds in mcpba epoxidations. The second-order reaction rates were measured for the MCPBA epoxidation in CH2Cl2 for a series of cyclic olefins including bridgehead olefins and trans-cycloalkenes. As expected, strained bridgehead alkenes and trans-cycloalkenes showed faster rea...