Imitating the Physical Properties of Drifting Semibuoyant Fish (Cyprinidae) Eggs with Artificial Eggs

Dudley, Robert; Platania, Steven P.

doi:10.1080/02705060.1999.9663700

Cited by 29 publications

(41 citation statements)

References 7 publications

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“…Authors who discuss pelagic eggs in freshwater have generally represented the specific gravity of the egg as a static quantity (e.g. Hardy, 1978;Hurley, 1991;Davin et al, 1999;Dudley and Platania, 1999). Our results clearly indicated that egg specific gravity was highly dynamic in response to the environmental conditions of incubation.…”

Section: Physical Properties Of Fish Eggs In Response To Salinity Chasupporting

confidence: 70%

“…Both of these properties of the egg affect its potential to be transported by water currents. Laboratory studies have been used to speculate that H. amarus offspring could drift hundreds of kilometers downstream (Dudley and Platania, 1999). However, recent experimental data suggest that drift of pelagic fish eggs may be much shorter (Kehmeier et al, 2004).…”

Section: Implications For Species Recovery and Habitat Restorationmentioning

confidence: 99%

See 1 more Smart Citation

Effects of salinity on specific gravity and viability of eggs of a North American minnow (Cyprinidae)

Cowley¹,

Alleman²,

Sallenave³

et al. 2009

Sci. Mar.

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SUMMARY: The influence of salinity on survival, specific gravity, and size of eggs of the endangered Hybognathus amarus (Rio Grande silvery minnow) was studied to provide insight into factors affecting their potential dispersal and fate. Under low salinity conditions egg specific gravity declined significantly in the first hour after spawning as the perivitelline space of the egg filled with water. Egg specific gravity achieved a minimum value approximately 1 h post-spawning and remained approximately constant until hatching, which occurred near 48 h post-spawning at 20ºC. Specific gravity of the egg depended on the salinity of the water surrounding the egg: hardened eggs changed rapidly in diameter and specific gravity when exposed to water of higher salinity. Size and specific gravity of H. amarus eggs also differed when the eggs were incubated in different groundwater sources. Experiments indicated that calcium chloride saline solution had a greater effect on egg specific gravity and size than did solutions of sodium or potassium chlorides. Survival of H. amarus eggs declined sharply at salinity greater than 3 (practical salinity units, PSU) and was only 5% at a salinity of 8. Habitat restoration to benefit H. amarus should consider the salinity of habitats in which eggs incubate.Keywords: fish egg drift, buoyancy, osmosis, survival, Hybognathus amarus. RESUMEN: EFECTOS DE LA SALINIDAD SOBRE LA GRAVEDAD ESPECÍFICA Y LA VIABILIDAD DE HUEVOS DE UNA CARPA NORTEAMERICANA (CIPRINIDAE). -El efecto de la salinidad sobre la supervivencia, gravedad específica y talla de los huevos del ciprínido puesto en peligro de extinción, Hybognathus amarus, fue estudiado para proporcionar información sobre los factores que afectan la dispersión y el destino de los huevos. Bajo condiciones de salinidad baja la gravedad específica del huevo disminuyó de forma significativa durante la primera hora después de la puesta, a medida que el espacio del perivitelino del huevo se fue llenando de agua. La gravedad específica del huevo alcanzó un valor mínimo 1 hora después de la puesta y quedó aproximadamente constante hasta eclosión, que ocurrió alrededor de 48 horas tras la puesta a 20˚C. La gravedad específica del huevo dependió de la salinidad del agua que le rodeaba. Los huevos con corion endurecido cambiaron rápidamente en diámetro y gravedad específica cuando fueron expuestos a agua de salinidad más alta. El tamaño y la gravedad específica de los huevos de H. amarus también se diferenciaron cuando los huevos fueron incubados en diferentes fuentes de agua subterránea. Los experimentos indicaron que la solución salina del cloruro de calcio tuvo un mayor efecto sobre la gravedad específica del huevo que las soluciones de los cloruros del sodio o del potasio. Expuestos a soluciones de salinidad de más de 3 (PSU), la supervivencia de los huevos de H. amarus disminuyó claramente, bajando a sólo el 5% en la solución de 8. La restauración del hábitat con el objetivo de beneficiar a H. amarus debe considerar la salinidad de los hábitats en los...

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Section: Physical Properties Of Fish Eggs In Response To Salinity Chasupporting

confidence: 70%

Section: Implications For Species Recovery and Habitat Restorationmentioning

confidence: 99%

Effects of salinity on specific gravity and viability of eggs of a North American minnow (Cyprinidae)

Cowley¹,

Alleman²,

Sallenave³

et al. 2009

Sci. Mar.

View full text Add to dashboard Cite

show abstract

“…Low durability of gel beads was previously reported by researchers comparing various materials for studying egg transport (Ottaway 1981, Dudley andPlatania 1999), and semi-intact gel beads of the same variety appeared in samples collected the second day after release and less than 30 km from the point of &lease in the lower Savannah River, Georgia (Reinert et al 2004). Because Medley et al (2007) calculated bead passage through multiple 37-to 66-km reaches based on the quantity captured in drift nds and assumed that beads not captured (i.e., total number entering a reach minus number cllpaaed, extrapolated to total discharge) were retained in slack water and eddy features, bead ddaioration could have inflated retention estimates.…”

Section: A Re-analysis Of Data and Critique Of Medley Et Al -"Simulamentioning

confidence: 98%

A Re-Analysis of Data and Critique of Medley et al.—“Simulated Transport and Retention of Pelagic Fish Eggs during an Irrigation Release in the Pecos River, New Mexico”

Zymonas¹,

Propst²

2009

Journal of Freshwater Ecology

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“…He suggested pelagic eggs were vulnerable to burial or abrasion, but subsequent studies have shown that they are not. Near-neutral buoyancy makes eggs susceptible to very slight currents (i.e., 1 cm/s; Dudley & Platania 1999, 2007. Thus, they must be transported as part of the suspended load (sensu Einstein 1950) which precludes the risk of burial or abrasion by bedload sands.…”

Section: Letter To the Editormentioning

confidence: 99%

Drift versus retention: an alternative perspective to Wilde and Urbanczyk's ‘relationship between river fragment length and persistence of two imperiled great plains cyprinids’

Hoagstrom

2014

Journal of Freshwater Ecology

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Imitating the Physical Properties of Drifting Semibuoyant Fish (Cyprinidae) Eggs with Artificial Eggs

Cited by 29 publications

References 7 publications

Effects of salinity on specific gravity and viability of eggs of a North American minnow (Cyprinidae)

Effects of salinity on specific gravity and viability of eggs of a North American minnow (Cyprinidae)

A Re-Analysis of Data and Critique of Medley et al.—“Simulated Transport and Retention of Pelagic Fish Eggs during an Irrigation Release in the Pecos River, New Mexico”

Drift versus retention: an alternative perspective to Wilde and Urbanczyk's ‘relationship between river fragment length and persistence of two imperiled great plains cyprinids’

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