Daily variation in ingress of fall-spawned larval fishes into Delaware Bay in relation to alongshore and along-estuary wind components

Schieler, Brittany; Hale, Edward A.; Targett, Timothy E.

doi:10.1016/j.ecss.2014.10.004

Cited by 15 publications

(25 citation statements)

References 41 publications

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“…Position of the sampling sites relative to their respective bay mouths, the influence of environment (water temperature, wind angle, river discharge), and oceanic currents may affect the taxonomic composition and structure of larval fish communities (Warlen et al 2002, Hare et al 2005, Hare & Able 2007, Love et al 2009, Schieler et al 2014). However, the broad sea sonal patterns observed in assemblage structure were con sistent between sites.…”

Section: Discussionmentioning

confidence: 99%

“…1) -larvae of many fishes are transported by currents into estuaries from spawning sites along the continental shelf to as far away as the Sargasso Sea, while other fishes and larvae are retained within the estuaries (Warlen & Burke 1990, Able & Fahay 1998. Therefore, temporal patterns of larval fish composition in a specific estuary are the result of the transport dynamics conveying larvae from their spawning site and retention within the estuary (Hare et al 2005, Schieler et al 2014). Consequently, this temporal pattern is dependent on the distance between the estuary and spawning locations of the resident and coastal species living in the area, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Composition and temporal patterns of larval fish communities in Chesapeake and Delaware Bays, USA

Ribeiro¹,

Hale²,

Hilton³

et al. 2015

Mar. Ecol. Prog. Ser.

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Comparing larval fish assemblages in different estuaries provides insights about the coastal distribution of larval populations, larval transport, and adult spawning locations. We simultaneously compared the larval fish assemblages entering 2 Middle Atlantic Bight (MAB) estuaries (Delaware Bay and Chesapeake Bay, USA) through weekly sampling from 2007 to 2009. In total, 43 taxa (32 families) and 36 taxa (24 families) were collected in Delaware and Chesapeake Bays, respectively. Mean taxonomic diversity, mean richness, and evenness were generally lower in Delaware Bay. Communities of both bays were dominated by Anchoa spp., Gobiosoma spp., Micropogonias undulatus, and Brevoortia tyrannus; Paralichthys spp. was more abundant in Delaware Bay and Microgobius thalassinus was more abundant in Chesapeake Bay. Inter-annual variation in the larval fish communities was low at both sites, with a relatively consistent composition across years, but strong seasonal (intra-annual) variation in species composition occurred in both bays. Two groups were identified in Chesapeake Bay: a 'winter' group dominated by shelfspawned species and a 'summer' group comprising obligate estuarine species and coastal species. In Delaware Bay, 4 groups were identified: a 'summer' group of mainly obligate estuarine fishes being replaced by a 'fall' group; 'winter' and 'spring' groups were dominated by shelf-spawned and obligate estuarine species, respectively. This study demonstrates that inexpensive and simultaneous sampling in different estuaries provides important insights into the variability in community structure of fish assemblages at large spatial scales.KEY WORDS: Estuarine systems · Young-of-the-year · Community composition · Temporal variability · Ichthyoplankton · Middle Atlantic Bight Resale or republication not permitted without written consent of the publisher

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Composition and temporal patterns of larval fish communities in Chesapeake and Delaware Bays, USA

Ribeiro¹,

Hale²,

Hilton³

et al. 2015

Mar. Ecol. Prog. Ser.

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“…However this hypothesis may be discounted at least for a number of fish species for the three following reasons. Firstly, and most importantly, field studies reveal that the larvae do not enter into the estuaries using STST, indeed they have been observed to enter the estuary by swimming against the currents at ebb tide in some cases, and to enter by swimming against a prevailing seaward wind-driven current; the larvae however use STST once they have entered the estuary to migrate upstream inside the estuary (Weinstein et al, 1980;Jager, 1999;Forward et al, 1998 and1999;Hare and Govoni, 2005;Schieler et al, 2014;Pattrick and Strydom, 2014). Secondly, the fish larvae at sea were observed to either remain in surface waters (i.e.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 97%

Bounded and unbounded boundaries – Untangling mechanisms for estuarine-marine ecological connectivity: Scales of m to 10,000 km – A review

Wolanski

2017

Estuarine, Coastal and Shelf Science

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“…Spawning also occurs in estuaries from August–September; however, as autumn progresses spawning adults move into deeper shelf waters seeking preferable water temperatures to spawn (Barbieri et al., ) and overwinter (Thorrold, Jones, & Campana, ). The appearance of early stage croaker and menhaden in Delaware Bay during winter months is the result of transport by offshore and nearshore currents during this critical period of peak ingress into estuaries along the MAB (Schieler, Hale, & Targett, ).…”

Section: Introductionmentioning

confidence: 99%

Vertical distribution of larval Atlantic menhaden (Brevoortia tyrannus) and Atlantic croaker (Micropogonias undulatus): Implications for vertical migratory behaviour and transport

Hale

Targett

2017

Fisheries Oceanography

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Understanding the interactions among biological and physical processes is essential to determining how the environment affects transport and survival of fishes. We examined vertical distribution in larval Atlantic menhaden (Brevoortia tyrannus) and Atlantic croaker (Micropogonias undulatus) using 126 depth stratified tows in Delaware Bay, USA, during two cruises, in December 2007 and February 2008. Menhaden larvae were 16.8–24.6 and 20.5–26.2 mm standard length in December and February. Corresponding lengths for croaker were 9.3–17.9 and 8.6–19.6 mm. Using empirical observations, and statistically derived models, we explored larval concentration for both species as a function of location, depth, diel period, tidal period, size, and pairwise interactions. Menhaden concentration was best modeled as a function of station, cruise, and interactions between depth and size as well as between station and cruise. No significant differences in larval menhaden concentration were present among tidal and diel periods. Croaker concentration was best modeled as a function of size and interactions between station and diel period, depth and size, cruise and size. Despite tidal period not emerging as a significant model parameter, we observed larger croaker larvae during nighttime flood tides. Our statistical models are consistent with processes of up‐estuary transport for both species, suggesting larvae are increasingly affected by behavioral responses as larvae grow, exhibiting stronger patterns in vertical distribution. The results refine our understanding of the potential importance of size‐related differences in vertical distribution for larval transport in these species. Future research should examine the interactions among size‐specific vertical migratory capabilities, vertical distribution, transport, and retention.

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Daily variation in ingress of fall-spawned larval fishes into Delaware Bay in relation to alongshore and along-estuary wind components

Cited by 15 publications

References 41 publications

Composition and temporal patterns of larval fish communities in Chesapeake and Delaware Bays, USA

Composition and temporal patterns of larval fish communities in Chesapeake and Delaware Bays, USA

Bounded and unbounded boundaries – Untangling mechanisms for estuarine-marine ecological connectivity: Scales of m to 10,000 km – A review

Vertical distribution of larval Atlantic menhaden (Brevoortia tyrannus) and Atlantic croaker (Micropogonias undulatus): Implications for vertical migratory behaviour and transport

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