Reproductive Development and Related Observations during the Spawning Migration of Hickory Shad

Murauskas, Joshua G.; Rulifson, Roger A.

doi:10.1080/00028487.2011.607036

Cited by 15 publications

(35 citation statements)

References 14 publications

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“…Seasonal timing of spawning was similar to that expected from spawning elsewhere along the U.S. East Coast, give or take a month. For instance, results from this study observed Hickory Shad spawning through late May, which is little over a month later than reported by Marshall (1976) and Murauskas and Rulifson (2011). Spawning of American Shad was similar to that reported by Harris and Hightower (2011b).…”

Section: Spawning Rangessupporting

confidence: 82%

Overlapping Habitat Use of Multiple Anadromous Fish Species in a Restricted Coastal Watershed

Smith

Rulifson

2015

Trans Am Fish Soc

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The purpose of this study was to document timing and habitat of alosines (Hickory Shad Alosa mediocris, American Shad A. sapidissima, Alewife A. pseudoharengus, and Blueback Herring A. aestivalis) and Striped Bass Morone saxatilis in the lower Tar River, a North Carolina coastal watershed partially restricted by an unused industrial dam. Alosines and Striped Bass are usually separated in time or space during spawning activity but occasionally overlap in some systems. Results show that both eggs and larvae of Hickory Shad and Striped Bass predominated catches, followed by American Shad. Alewife and Blueback Herring had negligible catches of eggs and larvae, but a separate study conducted 48 river kilometers downstream of the study area collected larvae of both species. Eggs and larvae of target species overlapped spatially and were most abundant in downstream tributaries, which seasonally reached hypoxic to anoxic conditions. The origins of spawning are unknown, but the collection of eggs suggests that these low-velocity tributary habitats are used for spawning and are acceptable for survival, possibly even providing egg and larval refuge from predators. Eggs and larvae of target species, except Blueback Herring, were collected at the furthest upstream sampling location, which suggests that the dam was restricting upstream migration and habitat use. If the dam was to be removed or modified for fish passage, future studies could document how these species utilize and separate into the upstream habitats that once served as historical habitats for these species. Climate change and associated sea level rise, combined with habitat restriction from the dam, may affect how these species utilize the lower Tar River as time moves forward.

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Section: Spawning Rangessupporting

confidence: 82%

Overlapping Habitat Use of Multiple Anadromous Fish Species in a Restricted Coastal Watershed

Smith

Rulifson

2015

Trans Am Fish Soc

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“…the reproductive success of other imperiled anadromous fishes, such as alosines (e.g., Murauskas and Rulifson 2011) and Striped Bass (Rulifson and Dadswell 1995).…”

Section: Discussionmentioning

confidence: 99%

Trapping Effects and Fisheries Research: A Case Study of Sockeye Salmon in the Wenatchee River, USA

2014

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Trapping facilities are regularly used to achieve a variety of fishery research and management goals. Though care of sampled organisms is a central tenet of most agencies, the effects of trapping on fish behavior are seldom quantified. We used passive integrated transponder technology to calculate passage delay and blockage of adult Sockeye Salmon at a facility where all spring‐migrating fishes were trapped for research between 2008 and 2010. Median passage delay ranged from 0.4 to 8.7 days, and 8% to 38% of the return (2,387 to 21,090 adults) was precluded from reaching upriver spawning habitat. A protocol limiting trapping to less than 24 h per week was implemented in 2011 and median delay decreased to 6 min, with the result being that nearly all fish were able to ascend to spawning grounds for two consecutive years. The annual variation in delay was unrelated to run size or river flow, indicating that research activities requiring intensive trapping operations had inadvertently blocked tens of thousands of adult salmon from reaching spawning tributaries. We use this case study to advocate the adoption of a precautionary approach where trapping of adult migratory fishes is proposed but the effects are unknown.

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“…In contrast, reproductive investment is complete prior to migration in a population of American Shad found at a higher latitude (Glebe and Leggett 1981). Murauskas and Rulifson (2011) suggested that Hickory Shad in North Carolina, spawning every 3 d over a 2-to 4-week season, must be spawning batches of oocytes that recruited after the spawning season commenced.…”

Section: Indeterminate Fecundity In Alewivesmentioning

confidence: 99%

A Reappraisal of Reproduction in Anadromous Alewives: Determinate versus Indeterminate Fecundity, Batch Size, and Batch Number

et al. 2015

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Innovative methods for analysis of reproduction may provide more information that can be used to conserve species of concern. We present data on oocyte development, batch size, and batch number of anadromous Alewives Alosa pseudoharengus in a lake-spawning population located in Connecticut. We sampled female Alewives as they arrived at the spawning habitat (uprunners) and females as they were leaving (downrunners). We estimated batch size by weighing all oocytes and performed image analysis on oocytes in subsamples of some ovaries, thereby estimating oocyte size-frequency distribution to define the number of batches. We performed both whole-mount and histological analysis on other ovaries to compare gravimetric and stereological estimates of batch size and to precisely characterize oocyte developmental stages. Uprunners had advanced oocytes at the ultimate stage of vitellogenesis and usually three additional less-developed batches. Postovulatory follicles and oocytes that were being resorbed were prevalent in downrunners but were absent in uprunners. Females spawned at least three batches in a season; however, downrunners had nearly as many batches as uprunners in their ovaries, indicating there was continuing recruitment and maturation of fresh batches. A numerical model of oocyte growth indicated that there is sufficient time for batches recruited at the beginning of the spawning season to develop and be spawned in the same season, indicating that fecundity is indeterminate. Accurate assessments of individual reproductive performance will require detailed consideration of within-season oocyte dynamics as opposed to relying on enumerating oocytes in prespawners.

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Reproductive Development and Related Observations during the Spawning Migration of Hickory Shad

Cited by 15 publications

References 14 publications

Overlapping Habitat Use of Multiple Anadromous Fish Species in a Restricted Coastal Watershed

Overlapping Habitat Use of Multiple Anadromous Fish Species in a Restricted Coastal Watershed

Trapping Effects and Fisheries Research: A Case Study of Sockeye Salmon in the Wenatchee River, USA

A Reappraisal of Reproduction in Anadromous Alewives: Determinate versus Indeterminate Fecundity, Batch Size, and Batch Number

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