Migratory Behavior and Growth of Juvenile Anadromous Alewives, Alosa pseudoharengus, in a Rhode Island Drainage

Richkus, William A.

doi:10.1577/1548-8659(1975)104<483:mbagoj>2.0.co;2

Cited by 22 publications

(29 citation statements)

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“…While in the Wye, where the freshwater production of suitable prey species is greater and ample cover is available the juveniles remain feeding actively until a change in certain physical factors determines the onset of the autumn seaward migration (Claridge & Gardner, 1978;Kissil, 1974;O'Leary & Kynard, 1986;Richkus, 1975).…”

Section: Discussionmentioning

confidence: 99%

The diet of juvenile and adult twaite shad Alosa fallax fallax (lac�p�de) from the rivers Severn and Wye (Britain)

Aprahamian

1989

Hydrobiologia

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The diet of juvenile and adult twaite shad was studied at a number of freshwater and estuarine sites in the rivers Severn and Wye and in the coastal waters of Cardigan Bay (West Wales). In the Severn estuary and in the freshwater reaches of the Severn and Wye, adult twaite shad consumed little during their pre-spawning migration. In the Severn Estuary post-spawning adults were present during the summer months where they fed actively on mysids, gammarids and shrimps. Mysids dominated the diet of the adults caught in coastal waters during the autumn. The diet of one year old twaite shad was studied in the Severn Estuary. In May the one year olds from the lower estuary consumed mainly gammarids. During the summer months, this age-class moved into the inner estuary where they fed predominantly on mysids.The larvae and juveniles (age 0 + ) fed mainly on chironomid larvae and pupae and Simuliidae larvae, while in fresh water. In the estuary copepods, cladocerans and mysids dominated the diet of the juveniles. There was some suggestion of an increase in prey size during their period of residency in the estuary. The contrasting distribution of the juveniles in two river systems is discussed in relation to the effects of channelization.

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Section: Discussionmentioning

confidence: 99%

The diet of juvenile and adult twaite shad Alosa fallax fallax (lac�p�de) from the rivers Severn and Wye (Britain)

Aprahamian

1989

Hydrobiologia

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“…Marine habitation is punctuated by annual spawning runs, which occur from late March to early July, when adults migrate up coastal rivers to spawn in streams and ponds (Fay et al, 1983). Young alewives develop in freshwater nursery grounds for several months before descending as young-of-the-year (YOY) juveniles to estuarine, and ultimately marine, habitats (Bigelow and Schroeder, 1953;Richkus, 1975).…”

Section: Introductionmentioning

confidence: 99%

Branchial ionocyte organization and ion-transport protein expression in juvenile alewives acclimated to freshwater or seawater

Christensen

Hiroi

Schultz

et al. 2012

Journal of Experimental Biology

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SUMMARYThe alewife (Alosa pseudoharengus) is a clupeid that undergoes larval and juvenile development in freshwater preceding marine habitation. The purpose of this study was to investigate osmoregulatory mechanisms in alewives that permit homeostasis in different salinities. -cotransporter (NKCC1) were greater in seawater-acclimated individuals by 40% and 200%, respectively. NKA and NKCC1 were localized on the basolateral surface and tubular network of ionocytes in both acclimation groups. Immunohistochemical labeling for the cystic fibrosis transmembrane conductance regulator (CFTR) was restricted to the apical crypt of ionocytes in seawater-acclimated individuals, whereas sodium/hydrogen exchanger 3 (NHE3) labeling was present on the apical surface of ionocytes in both acclimation groups. Ionocytes were concentrated on the trailing edge of the gill filament, evenly distributed along the proximal 75% of the filamental axis and reduced distally. Ionocyte size and number on the gill filament were not affected by salinity; however, the number of lamellar ionocytes was significantly lower in seawater-acclimated fish. Confocal z-series reconstructions revealed that mature ionocytes in seawater-acclimated alewives occurred in multicellular complexes. These complexes might reduce paracellular Na + resistance, hence facilitating Na + extrusion in hypo-osmoregulating juvenile alewives after seaward migration.

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“…Adults of both species are prolific spawners (Scott and Scott 1988), and freshwater mortality rates of prejuvenile fish are very high (Kissil 1974). Juvenile river herring grow rapidly and typically spend 3-7 months in the freshwater nursery area before migrating seaward as early as mid-June (Richkus 1975). Young blueback herring are generally smaller and shorter than alewives of similar age (Scott and Scott 1988).…”

Section: Introductionmentioning

confidence: 99%

“…Environmental factors associated with juvenile migration include physical variables such as; high water levels, declines in water temperature (Richkus 1975;O'Leary and Kynard 1986;Stokesbury and Dadswell 1989), changes in rainfall (Stokesbury and Dadswell 1989;Yako et al 2002), lunar phase (O'Leary andKynard 1986;Stokesbury and Dadswell 1989;Yako et al 2002) and water visibility (Yako et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Factors affecting migration patterns of juvenile river herring in a coastal Massachusetts stream

Iafrate

Oliveira

2006

Environ Biol Fish

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Juvenile anadromous river herring (alewives, Alosa pseudoharengus, and blueback herring, Alosa aestivalis) spend 3-7 months in freshwater before migrating to the ocean, often exhibiting waves of early and late migrations. Migratory patterns and associated abiotic and biotic factors were examined for both species migrating in 2003 from Herring River in Bourne Massachusetts. Migrating herring were grouped into two temporal periods and separated by species. Relationships between abiotic (water temperature, lunar phase, and precipitation) and biotic (size, age, growth rate, and hatch date) factors and the timing of out-migration (transition to seawater) were examined. Blueback herring migration coincided with a sharp decrease in temperature consistent with the time of year. Peaks in alewive migration may reflect adaptive traits maximizing likelihood of survival through seasonal marginal stream habitats and also avoiding lethal water temperatures in winter. Migrating bluebacks exhibited a single migratory period (late September-October) which occurred between the early and late migratory pulses of the alewives. These patterns may also represent distinct migration strategies between early and late migrating alewives and between the two species of river herring. Early migration may be a mechanism by which factors such as competition and low food availability are mitigated. In contrast, environmental conditions during the post hatching time of late migrators may allow for a size maximizing strategy that promotes migration from the nursery area as late as possible.

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Migratory Behavior and Growth of Juvenile Anadromous Alewives, Alosa pseudoharengus, in a Rhode Island Drainage

Cited by 22 publications

References 0 publications

The diet of juvenile and adult twaite shad Alosa fallax fallax (lac�p�de) from the rivers Severn and Wye (Britain)

The diet of juvenile and adult twaite shad Alosa fallax fallax (lac�p�de) from the rivers Severn and Wye (Britain)

Branchial ionocyte organization and ion-transport protein expression in juvenile alewives acclimated to freshwater or seawater

Factors affecting migration patterns of juvenile river herring in a coastal Massachusetts stream

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