Bay anchovy Anchoa mitchilli in Narragansett Bay, Rhode Island. II. Spawning season, hatch-date distribution and young-of-the-year growth

Lapolla, Amy E.

doi:10.3354/meps217103

Cited by 20 publications

(22 citation statements)

References 28 publications

(43 reference statements)

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“…8, suggests that the eggs and copepods are not simple covariates of watermass movement. Instead, these results support the hypothesis that prey availability prior to spawning is a determinant of spawning intensity (Luo & Musick 1991, Peebles et al 1996, Hood et al 1999, Lapolla 2001. Hay & Brett (1988) and Milton et al (1994) reported dependence of sizespecific fecundity on prey availability for several species of clupeoid fishes.…”

Section: Discussioncontrasting

confidence: 34%

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Temporal resolution of biological and physical influences on bay anchovy Anchoa mitchilli egg abundance near a river-plume frontal zone

Peebles¹

2002

Mar. Ecol. Prog. Ser.

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Bay anchovy egg abundance in the Manatee River estuary, Florida, was compared with conditions in the spawning ground before and after spawning to distinguish prey-supply-based spawning responses from post-spawning advective effects. Plume fronts were a prominent feature of the spawning ground. Egg distribution, copepod distribution and front development were surveyed 25 times across a wide range of freshwater inflow conditions. Surface-front strength (maximum interpolated salinity slope) was strongly correlated with the size of the frontal zone, as defined by surface areas having slopes >1 psu km -1 . Eggs were most abundant landward of the frontal zone at a location with consistently high abundance of the copepod Acartia tonsa, which is consumed by adult and larval bay anchovies. Large, significant changes in egg abundance were observed over both long (seasons) and short (< 3 d) periods (Tukey 95% HSD multiple range tests). An El Niño-associated flood event caused the rapid evolution of a large, seaward-moving frontal system that initially had a negative effect on egg abundance. Spawning resumed in reduced salinity following passage of the front, demonstrating a level of plasticity in spawning response to salinity change. A stepwise regression model explained 92% of the variation in egg abundance and suggested that tidal amplitude was not a significant determinant of abundance. Instead, egg abundance appeared to be determined initially by pre-spawning prey supply and temperature, and subsequently by variable retention behind the frontal zone.

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Section: Discussioncontrasting

confidence: 34%

“…When eggs are in short supply, the resulting recruitment will certainly be low. Lapolla (2001) attributed the end of the bay anchovy spawning season in Narragansett Bay to decreased zooplankton abundance and found the best juvenile recruitment to be associated with known zooplankton-rich periods.…”

Section: Discussionmentioning

confidence: 99%

Temporal resolution of biological and physical influences on bay anchovy Anchoa mitchilli egg abundance near a river-plume frontal zone

Peebles¹

2002

Mar. Ecol. Prog. Ser.

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“…Firstly, the present study has proved that mean spawning effort of sprat is indeed shifted by almost 1 mo from central to northeastern Baltic spawning grounds. Assuming that sprat reproduction is cued by temperature, as for example in the bay anchovy Anchoa mitchilli (Lapolla 2001 …”

Section: Spatial Differences Between Baltic Yoy Spratmentioning

confidence: 99%

Temperature-induced regional and temporal growth differences in Baltic young-of-the-year sprat Sprattus sprattus

Baumann

Gröhsler²,

Kornilovs³

et al. 2006

Mar. Ecol. Prog. Ser.

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We examined spatial and temporal differences in growth patterns of young-of-the-year (YoY) sprat Sprattus sprattus synchronously sampled in October 2002 from 4 different regions of the Baltic Sea (western, central, eastern, northeastern Baltic). The microstructure of the sagittal otoliths of 427 individuals from 64 sampling sites were analysed to determine the day of first feeding (DFF) and the growth history of YoY survivors. DFF distributions differed markedly between Baltic areas, with a shift to later mean DFFs and narrower distributions from west to northeast. This was consistent with the shift in mean seasonal spawning effort of Baltic sprat, derived from long-term observations (1973 to 2002) of sprat egg abundance in these areas. Otolith growth trajectories (i.e. increment width-at-age) had a characteristic shape related to sampling area and, more importantly, to the time of the year at which the individual started feeding (DFF). During the larval stage, individuals from the northeastern area and those born later in the year had higher growth rates than their earlier born conspecifics, while the pattern was reversed during the juvenile stage. Weekly means of satellitebased sea-surface temperature were used to approximate the potential temperature history of YoY survivors, which significantly influenced the shape of the otolith growth trajectory. We conclude that different DFFs and therefore different temperature histories were primarily responsible for the largescale spatial growth variability between newly recruited Baltic YoY sprat in 2002.KEY WORDS: Young-of-the-year sprat · Otolith microstructure analysis · Satellite data · Sea-surface temperature · Growth patterns · Day of first feeding · Egg abundance Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 317: [225][226][227][228][229][230][231][232][233][234][235][236] 2006 throughout the larval and early juvenile stages of sprat . Because survival in the field is often coupled with growth (Houde 1989), a better understanding of the processes that influence growth patterns in larval and juvenile Baltic sprat is desirable. However, an inherent limitation of growth studies on larvae and early juveniles is that 'average' patterns do not reflect the small fraction of individuals that will eventually emerge as survivors of these stages (Sharp 1987). It is thus meaningful to obtain samples from successful sprat recruits and investigate their growth histories, which can later be compared to individuals sampled earlier from the population.Growth histories of sprat survivors are best inferred from otolith microstructure analysis of newly recruited, young-of-the-year (YoY) or 0-group sprat because, until their first winter, sprat are known to form readily discernible, daily increments that correspond in width to daily somatic growth rates and allow a direct backcalculation until the day of first feeding (DFF) (Baumann et al. in press). In sprat, DFFs comprise the best available proxy for hatch date, beca...

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“…The Hudson River bay anchovy population shows similar trends in overall spawning characteristics (i.e spawning season, daily behavior, and spawning frequency) as observed in other western Atlantic estuarine and coastal systems (Wheatland 1956, Dovel 1981, LaPolla 2001b. Bay anchovy migrate into the Hudson River in early spring to spawn nightly during the season.…”

Section: Discussionmentioning

confidence: 55%

Reproductive biology and egg mortality of bay anchovy, Anchoa mitchilli, in the Hudson River estuary

Bassista

Hartman

2005

Environ Biol Fish

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SynopsisBay anchovy, Anchoa mitchilli, is an ecologically important species in coastal systems, acting as predators on zooplankton while serving as prey for many birds and economically important finfish species. Despite the importance of bay anchovy, limited information exists concerning reproductive biology and egg mortality from the northern parts of its range. Spawner demographics suggested Hudson River fish were older and larger than reported elsewhere. Egg mortality rates were higher in the Hudson River than reported in more southerly systems. Differences in the reproductive biology of bay anchovy suggest either anthropogenic factors or latitudinal differences between populations exist and therefore should warrant further investigations on this species in the northern portions of its range.

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Bay anchovy Anchoa mitchilli in Narragansett Bay, Rhode Island. II. Spawning season, hatch-date distribution and young-of-the-year growth

Cited by 20 publications

References 28 publications

Temporal resolution of biological and physical influences on bay anchovy Anchoa mitchilli egg abundance near a river-plume frontal zone

Temporal resolution of biological and physical influences on bay anchovy Anchoa mitchilli egg abundance near a river-plume frontal zone

Temperature-induced regional and temporal growth differences in Baltic young-of-the-year sprat Sprattus sprattus

Reproductive biology and egg mortality of bay anchovy, Anchoa mitchilli, in the Hudson River estuary

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