Bowers, A.B. and Holliday, F.G.T. (1961) Histological changes in the gonad associated with the reproductive cycle of the herring (Clupea harengus L.). Marine Research Department of Agriculture and Fisheries for Scotland 5, 1–16.
Bromley, P.J. (2003) Progress towards a common gonad grading key for estimating the maturity of North Sea plaice. Report of the Working Group on Modern Approaches to Assess Maturity and Fecundity of Warm- and Cold-water Fish and Squids, Fisken Hav., No. 12-2003, pp 19–24, 140 pp.
Carrassón, M. and Bau, M. (2003) Reproduction and gonad histology of Aidablennius sphinx (Pisces: Blenniidae) of the Catalan Sea (north-western Mediterranean). Scientia Marina 67, 461–469.
Claereboudt, M.R., Mcllwain, J.L., Al-Oufi, H.S. and Ambu-Ali, A.A. (2005) Patterns of reproduction and spawning of the kingfish (Scomberomorus commerson, Lacépède) in the coastal waters of the Sultanate of Oman. Fisheries Research 73, 273–282.
Cohen, J. (1960) A coefficient of agreement for nominal scales. Educational and Psychological Measurement 20, 37–46.
DeVlamming, V., Grossman, G. and Chapman, F. (1982) On the use of the gonadosomatic index. Comparative Biochemistry and Physiology A 73, 31–39.
Erickson, D.L., Hightower, J.E. and Grossman, G.D. (1985) The relative gonadal index: an alternative index for quantification of reproductive condition. Comparative Biochemistry and Physiology A 81, 117–120.
Gerritsen, H.D. and McGrath, D. (2006) Variability in the assignment of maturity stages of plaice (Pleuronectes platessa L.) and whiting (Merlangius merlangus L.) using macroscopic maturity criteria. Fisheries Research 77, 72–77.
Hunter, J.R. and Macewicz, B.J. (2003) Improving the accuracy and precision of reproductive information used in fisheries. Report of the Working Group on Modern Approaches to Assess Maturity and Fecundity of Warm- and Cold-water Fish and Squids, Fisken Hav., No. 12-2003 57–68, 140 pp.
ICES (2008) Report of the planning group on herring surveys. ICES C.M. 2008/LRC: 01, 256 pp.
Kennedy, J., Skjæraasen, J.E., Nash, R.D.M., Thorsen, A., Slotte, A., Hansen, T. and Kjesbu, O.S. (2010) Do capital breeders like Atlantic herring (Clupea harengus) exhibit sensitive periods of nutritional control on ovary development and fecundity regulation? Canadian Journal of Fisheries and Aquatic Sciences 67, 16–27.
Klibansky, N. and Juanes, F. (2007) Species-specific effects of four preservative treatments on oocytes and ovarian material of Atlantic cod (Gadus morhua), haddock (Melanogrammus aeglefinus) and American plaice (Hippoglossoides platessoides). Fishery Bulletin 105, 538–547.
Koya, Y., Soyano, K., Yamamoto, K., Obana, H. and Matsubara, T. (2003) Oocyte development and serum profiles of vitellogenin and steroid hormone levels in captive female Pacific herring Clupea pallasii during their first maturational cycle. Fishery Science 63, 137–145.
La Mesa, M., Caputo, V., Rampa, R. and Vacchi, M. (2003) Macroscopic and histological analyses of gonads during the spawning season of Chionodraco hamatus (Pisces, Channichthyidae) off Terra Nova Bay, Ross Sea, Southern Ocean. Polar Biology 26, 621–628.
Landry, J. and McQuinn, I.H. (1988) Guide to microscopic and macroscopic identification of the sexual maturity stages of the Atlantic herring (Clupea harengus harengus L.). Canadian Technical Report of Fisheries and Aquatic Sciences, No. 1655, 71 pp.
Lea, E. (1910) Contributions to the methodics in herring-investigations. Publications de Circonstance 53, 7–33.
McQuinn, I.H. (1989) Identification of spring- and autumn-spawning herring (Clupea harengus harengus) using maturity stages assigned from gonadosomatic index model. Canadian Journal of Fisheries and Aquatic Sciences 46, 969–980.
Potoschi, A., Renones, O. and Cannizzaro, L. (1999) Sexual development, maturity and reproduction of dolphinfish (Coryphaena hippurus) in the western and central Mediterranean. Scientia Marina 63, 367–372.
R Development Core Team (2009) R: a language and environment for statistical computing. Vienna: R Foundation for Satistical Computing. ISBN 3-900051-07-0, URL http://www.R-project.org.
Saborido-Rey, F. and Junquera, S. (1998) Histological assessment of variations in sexual maturity of cod (Gadus morhua L.) at the Flemish Cap (north-west Atlantic). ICES Journal of Marine Research 55, 515–521.
Somarakis, S., Ganias, K., Tserpes, G. and Koutsikopoulos, C. (2004) Ovarian allometry and the use of the gonadosomatic index: a case study in the Mediterranean sardine, Sardina pilchardus. Marine Biology 146, 181–189.
Tomkiewicz, J., Tybjerg, L. and Jespersen, Å. (2003) Micro- and macroscopic characteristics to stage gonadal maturation of female Baltic cod. Journal of Fish Biology 62, 253–275.
Tyler, C.R. and Sumpter, J.P. (1996) Oocyte growth and development in teleosts. Reviews in Fish Biology and Fisheries 6, 287–318.
Vitale, F., Svedäng, H. and Cardinale, M. (2006) Histological analysis invalidates macroscopically determined maturity ogives of the Kattegat cod (Gadus morhua) and suggests new proxies for estimating maturity status of individual fish. ICES Journal of Marine Science 63, 485–492.
West, G. (1990) Methods of assessing ovarian development in fishes: a review. Australian Journal of Marine and Freshwater Research 41, 199–222.
Williams, K. (2007) Evaluation of the macroscopic staging method for determining maturity of female walleye pollock Theragra chalcogramma in Shelikof Strait, Alaska. Alaska Fishery Research Bulletin 12, 252–263.