Developing Alternative Indices of Reproductive Potential for Use in Fisheries Management: Case Studies for Stocks Spanning an Information Gradient

Marshall, C. Tara; O’Brien, Laura; Tomkiewicz, Jonna; Köster, F.W.; Kraus, Gerd; Marteinsdóttir, Guðrún; Morgan, M. J.; Saborido‐Rey, Fran; Blanchard, Julia L.; Secor, David H.; Wright, P.J.; Mukhina, NV; Björnsson, Höskuldur

doi:10.2960/j.v33.a8

Cited by 134 publications

(151 citation statements)

References 60 publications

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“…Spawning stock biomass has been commonly used as a rough approximation of egg production, and this approach in itself has come under much criticism (e.g., Marshall et al, 2003;O'Brien et al, 2003;Mukhina et al, 2003). This is a preliminary attempt to estimate viable sperm production across a time series of a fish stock.…”

Section: Discussionmentioning

confidence: 99%

“…However, much opportunity exists for other processes to act on cohorts before reaching age 3, such as natural and undirected fishing mortality. Prediction of recruitment variation of some fish stocks has been improved by integration of characteristics of population demography and energetics (Murawski et al, 2001;Marshall et al, 2003). For Div.…”

Section: Discussionmentioning

confidence: 99%

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Estimation of Male Reproductive Success of Marine Fisheries

Trippel¹

2003

J. Northw. Atl. Fish. Sci.

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The subject of reproductive potential of fish populations is dominated by studies on the female gender. Studies on male reproduction are relatively few, but have increased in number during the previous decade. The objectives of this contribution were to describe and quantify the reproductive traits that make up the viable sperm production of a population. Some of these reproductive traits were easily measured from wild fish (e.g., mature testes weight), and others were more easily measured on captive fish (e.g., fertilization potential and sperm motility). Results of laboratory and field studies were then integrated to generate estimates of viable sperm production of a fish stock. A number of experimental protocols have been employed over the years to assess male fertility. The strengths and weaknesses of the different experimental approaches were reviewed and appropriate recommendations given towards establishing standardized protocols. Although the review is broad in nature, and includes references to a number of marine fishes, it concentrated on exploited species that occur in the North Atlantic and Baltic Sea within the taxonomic groups gadoidae, pleuronectoidae and clupeidae (Clupeiformes). In addition, published data on male reproductive traits of species in these taxa were tabulated and summarized. The terms of interest included sex ratio, maturity state, testes weight, sperm fertilization potential (artificial fertilization and paired mating), sperm density, sperm motility and paternal effects on early life history traits.An equation for determinate spawners was described that quantifies a population's viable sperm production using data on adult body characteristics and associated quantity and quality of sperm. The equation was used to establish time series of viable sperm production for Atlantic cod (Gadus morhua) of Newfoundland and Labrador. Results indicated on average 1 600 billion viable sperm were released to produce one recruit at age 3 years but with substantial variation among years in relation to changes in stock composition and growth as well as stock size. Distinct peaks in the number of viable sperm in 1981 and 1986 corresponded to distinct peaks in the number of age 3 recruits in those same years.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Estimation of Male Reproductive Success of Marine Fisheries

Trippel¹

2003

J. Northw. Atl. Fish. Sci.

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“…Recent research challenging these assumptions, however, demonstrates that stock-recruitment relationships can be significantly improved by use of SRP indices that consider stock demography, spawner quality and environmental variability (Marshall et al, 1998;Scott et al, 1999;Köster et al, 2001;Murawski et al, 2001;Begg and Marteinsdottir, 2002). These studies also demonstrate that considerable amounts of data relevant to spawner-recruitment studies are available, which are not utilized in standard stock assessments (Ulltang, 1998;Trippel, 1999;Köster et al, 2003;Marshall et al, 2003).…”

Section: Introductionmentioning

confidence: 98%

Available Information for Estimating Reproductive Potential of Northwest Atlantic Groundfish Stocks

Tomkiewicz¹,

Morgan²,

Burnett³

et al. 2003

J. Northw. Atl. Fish. Sci.

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The availability of data to improve indices of stock reproductive potential was reviewed for 42 Northwest Atlantic groundfish stocks comprising gadoids, flatfishes, redfishes and grenadiers. For many of the stocks, information on population parameters such as stock size and size/age composition estimates exists for three or more decades. Data on fish age, weight, maturity and sex ratios in the population have also been extensively collected, often allowing for establishment of time series of annual data that could be used for assessing spawning stock biomass and female spawning stock. However, possibilities for estimating stock potential egg production are constrained by scarcity of fecundity data. Data on fish condition, which can be useful in developing fecundity models, were seldom collected in earlier times, but have increased in recent decades. A data richness index, combining information about data quantity and quality, ranked most gadoid stocks as "data comprehensive" with a high proportion of stocks possessing some fecundity information. Flatfish stocks generally were "data moderate" owing to slightly shorter time series of data, while redfish and grenadier stocks in general were "data restricted". Published studies linking aspects of reproductive potential with parental characteristics and/or recruitment have become more frequent as "data richness" has improved for many stocks, but generally the prevalence of such studies remains low.

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“…The spawning stock biomass of both species has biomasa desovante mediante el Método de Producción Diaria de Huevos (MPDH) (Stratoudakis et al 2006). La fecundidad es un componente importante de la producción total de huevos, y sus cambios tienen un impacto notable en el potencial reproductivo e implicaciones en el manejo de las pesquerías (Kjesbu et al 1991, Solemdal 1997, Marteinsdottir y Begg 2002, Marshall et al 2003, Murua y Saborido-Rey 2003.…”

Section: Introductionunclassified

“…Fecundity is an important component of total egg production, and changes in fecundity have a notable impact on reproductive potential and implications for fisheries management (Kjesbu et al 1991, Solemdal 1997, Marteinsdottir and Begg 2002, Marshall et al 2003, Murua and Saborido-Rey 2003.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007)

et al. 2011

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Anchovy Engraulis ringens and common sardine Strangomera bentincki are two small pelagic fish that co-occur in the same reproductive habitat off central and southern Chile and have a similar reproductive strategy. Interannual and spatial changes in the batch fecundity of both fish were analyzed with the purpose of detecting variability in the parameters and inferring different reproductive tactics that could affect the reproductive potential. Samples were obtained from adult surveys carried out to estimate spawning biomass by the Daily Egg Production Method, from 2002 to 2007, off Chile. The study area was divided into two zones: central and south. The batch fecundity was linearly related to ovary-free female body weight for each year. For anchovy, the slope was not different across years and zones, while for sardine, changes in intercept and slopes varied significantly among years, but not between zones. The average weight of mature females tended to be higher in the south zone for both species, and average batch fecundity ranged from 4,283 to 8,903 eggs per mature female anchovy, and from 5,901 to 10,414 eggs per mature female sardine. Although the anchovy and sardine reproductive strategy is similar, differences in batch fecundity seemed to be the main distinction between the species in the central and southern spawning sites off Chile, with implications for the reproductive potential.

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Developing Alternative Indices of Reproductive Potential for Use in Fisheries Management: Case Studies for Stocks Spanning an Information Gradient

Cited by 134 publications

References 60 publications

Estimation of Male Reproductive Success of Marine Fisheries

Estimation of Male Reproductive Success of Marine Fisheries

Available Information for Estimating Reproductive Potential of Northwest Atlantic Groundfish Stocks

Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007)

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