Fecundity studies on North Sea herring

Burd, Aleksander; Howlett, G. J.

doi:10.1093/icesjms/35.2.107

Cited by 26 publications

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“…The choice of hatching sites was based on the survey time series from ICES (ICES 2009) and also corresponded to those described by Burd & Howlett (1974). The energetic approach used by Fiksen & Folkvord (1999) proved useful and was in agreement with the larval lengths in the MIK net surveys (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The model did not account for far-field drivers such as oceanic input from beyond the grid, but the validation studies suggest that these influences are less in the southern North Sea than the northern North Sea , Hjøllo et al 2009, Petitgas et al 2009). The choice of hatching sites was based on the survey time series from ICES (ICES 2009) and also corresponded to those described by Burd & Howlett (1974). The energetic approach used by Fiksen & Folkvord (1999) proved useful and was in agreement with the larval lengths in the MIK net surveys (Fig.…”

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confidence: 99%

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Variability in transport of fish eggs and larvae. II. Effects of hydrodynamics on the transport of Downs herring larvae

Dickey‐Collas¹,

Bolle²,

Beek³

et al. 2009

Mar. Ecol. Prog. Ser.

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A 10-layered, finite-volume advection-dispersion model with real-time meteorological and freshwater runoff drivers investigated the interannual differences in the transport of Downs herring Clupea harengus L. larvae in the southern North Sea. Simulations were carried out for the winters of 1989 and 1996 to 2003. As they grew, the concentrations of herring larvae developed vertical behaviour. Meteorological forcing transported Downs herring larvae to the nursery grounds in the eastern North Sea with large interannual differences. Diel vertical movement was relatively unimportant in the transport of larvae in the hydrographically mixed southern North Sea. Year classes with less transport of larvae from the hatching area (which was generally warmer) were associated with greater abundances of young Downs herring in the ICES International Bottom Trawl Survey. This implies that retention, rather than dispersal or delivery of larvae to nursery grounds, is associated with the determination of year class strength in Downs herring.KEY WORDS: Clupea harengus · Biophysical models · Downs · Recruitment · Nursery · Drift Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 390: [183][184][185][186][187][188][189][190][191][192][193][194] 2009 1995). Most of the dispersive drift from the spawning grounds of herring stocks in western European waters is in an easterly direction , although other studies have suggested that retention of larvae is important for recruitment success (Iles & Sinclair 1982, Sinclair & Tremblay 1984. On the continental shelf, the local hydrography is highly influenced by meteorological forcing through wind, pressure and runoff, with additional far-field effects (Otto et al. 1990), whilst near the shelf, edge hydrography is also influenced by large-scale basin effects and oceanographic currents (Fernand et al. 2006). Most of the previous studies (e.g. Bartsch et al. 1989, Nichols & Brander 1989 of North Sea herring larval drift were carried out prior to the use of geostrophic (densitydriven) real-time models and thus failed to replicate most of the interannual variability. In addition, they did not account for the influence of freshwater runoff, which is important in the southern North Sea.In the present study we modelled the transport of substances (larvae) as a function of advective and dispersive transport in order to investigate the interannual variability in transport. The larvae were assigned behaviour in the vertical plane, which is different from individual-based modelling approaches or particle tracking of ichthyoplankton , Hinrichsen et al. 2003. We did not model behaviour in the horizontal plane, as this is less important for herring prior to the onset of metamorphosis (Henderson 1987, Gallego & Heath 1994. The sensitivity of the modelled transport to many of the assumptions about diel vertical behaviour was tested, and the final results were compared to empirical data and indices of recruitment in Downs herring. DATA AND METHODSHydrodyna...

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Variability in transport of fish eggs and larvae. II. Effects of hydrodynamics on the transport of Downs herring larvae

Dickey‐Collas¹,

Bolle²,

Beek³

et al. 2009

Mar. Ecol. Prog. Ser.

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“…Fecundity was estimated in 45 females using the gravimetric method (Burd and Howlett, 1974;Hunter et al, 1985). The oocytes were separated by introducing samples of completely mature ovaries into Gilson's solution, as modified by Simpson (1951).…”

Section: Methodsmentioning

confidence: 99%

Annual reproductive cycle and fecundity of <i>Scorpaena notata</i> (Teleostei, Scorpaenidae)

Muñoz¹,

Sàbat²,

Vila³

et al. 2005

Sci. Mar.

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SUMMARY: Scorpaena notata (Teleostei: Scorpaenidae) is an oviparous species with external fertilisation that shows some unusual features in its gonadal morphology and gametogenesis. In this work we analyse the annual reproductive cycle and the fecundity of this species by studying the monthly histological changes in the gonads and of various indices related to reproduction. Sexual dimorphism does not occur in the population we studied, which is clearly dominated by males. Multiple spawning takes place between July and October, consisting of between 6,000 and 33,000 eggs per female, each of about 500 µm in diameter. The fecundity of the species is determined by the size and weight of the individuals.Keywords: scorpionfish, reproduction, annual cycle, fecundity.RESUMEN: CICLO REPRODUCTIVO ANUAL Y FECUNDIDAD DE SCORPAENA NOTATA (TELEOSTEI: SCORPAENIDAE). -Scorpaena notata (Teleostei: Scorpaenidae) es una especie ovípara de fertilización externa que presenta algunas características peculiares en su morfología gonadal y gametogénesis. En este trabajo se analiza el ciclo reproductivo anual y la fecundidad de dicha especie, mediante el estudio de los cambios histológicos mensuales que muestran las gónadas a lo largo del ciclo anual así como de diversos índices relacionados con la reproducción. La población analizada no presenta dimorfismo sexual, aunque el número de machos es muy superior al de hembras. La puesta múltiple ocurre entre los meses de Julio y Octubre y consiste de entre 6000 y 33000 huevos por hembra, de unos 500 µm de diámetro. La fecundidad de la especie viene determinada por el tamaño y el peso de los especimenes.Palabras clave: escórpora, reproducción, ciclo anual, fecundidad.

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“…Information regarding eggs number is used to estimate reproductive potential and correlate fish length to fecundity (Laine and Rajasilta, 1998). Differences observed in fish fecundity are assigned to genetic and environmental factors (Baxter, 1959;Burd and Howlett, 1974;Messieh, 1976;Kelly and Stevenson, 1985;Sinclair and Trembley, 1984). Bromage (1995) suggests that female nutritional management influences the production of viable larvae.…”

Section: Introductionmentioning

confidence: 99%

Oocyte quality of tambaqui (Colossoma macropomum) during the reproductive season

et al. 2015

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The study aimed to analyze the Colossoma macropomum reproductive behavior and quality of the female gametes throughout the reproductive season. The experiment was carried out in Pimenta Bueno -Rondônia State (Northern Brazil) during the reproductive season (2010-2011) using 36 females. Each sampling was performed on a 15 ± 5 days interval. Female gametes were collected by stripping and the following analyses were performed: weight of oocytes released (g); productivity index, fertilization and hatching rate. During the sampling period was verified effect (p < 0.05) of collecting time into the season for oocytes weight, productivity index and fertilization rate. Although the period 3 (December) did not differ significantly from other periods, it showed better parameters for the quality of C. macropomum oocytes.Keywords: Characidae, fertilization rate, oocytes, reproduction, reproductive period. Qualidade ovocitária de tambaqui (Colossoma macropomum) ao longo da estação reprodutivaResumo O estudo foi conduzido com o objetivo de analisar o comportamento reprodutivo da espécie Colossoma macropomum, quanto à qualidade de seus gametas femininos ao longo da estação reprodutiva. O experimento foi executado em Pimenta Bueno-Rondônia durante a estação reprodutiva do C. macropomum. Utilizaram 36 fêmeas durante a estação de 2010-2011. Cada coleta apresentou um intervalo de 15±5 dias. Através da extrusão foram coletados os gametas femininos e realizadas as seguintes análises ao longo da estação: peso de oócitos liberados (g); índice de produtividade; taxa de fertilização e eclosão. Durante a estação 2010-2011 foi verificado efeito (p < 0,05) de período (coleta) dentro da estação para peso de oócitos, índice de produtividade e taxa de fertilização. Apesar do período 3 (coleta -mês de dezembro) não ter diferenciado significativamente de alguns períodos, foi o que apresentou os melhores parâmetros estabelecidos para a qualidade dos oócitos de C. macropomum.Palavras-chave: Characidae, taxa de fertilização, oócitos, reprodução, período reprodutivo.

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Fecundity studies on North Sea herring

Cited by 26 publications

References 0 publications

Variability in transport of fish eggs and larvae. II. Effects of hydrodynamics on the transport of Downs herring larvae

Variability in transport of fish eggs and larvae. II. Effects of hydrodynamics on the transport of Downs herring larvae

Annual reproductive cycle and fecundity of <i>Scorpaena notata</i> (Teleostei, Scorpaenidae)

Oocyte quality of tambaqui (Colossoma macropomum) during the reproductive season

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