Large-scale juvenile production of the blue crab Callinectes sapidus

Zmora, Odi; Findiesen, Andrea; Stubblefield, John; Frenkel, Victor; Zohar, Yonathan

doi:10.1016/j.aquaculture.2004.11.012

Cited by 120 publications

(97 citation statements)

References 9 publications

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“…The average SL in each trial did not differ among treatments (Kruskal-Wallis test statistic = 20.9, p = 0.231). Juvenile C. sapidus prey (CW 26.1 ± 5.4 mm) were provided by the Center for Marine Biotechnology's hatchery program (Zmora et al 2005), held in tanks with flowing water, and fed ad libitum with a pelleted shrimp diet (Zmora et al 2005). The average CW in each trial did not differ among treatments (KruskalWallis test statistic = 22.1, p = 0.139).…”

Section: Laboratory Setupmentioning

confidence: 99%

Density-dependent indirect effects: apparent mutualism and apparent competition coexist in a two-prey system

Long¹,

Gamelin²,

Johnson³

et al. 2012

Mar. Ecol. Prog. Ser.

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A predator consuming multiple prey species usually causes indirect effects. Apparent mutualism results when multiple prey species reduce predation risk for each other by altering a predator's functional response. Short-term apparent competition occurs when multiple prey species increase predation risks for each other through the numerical response, i.e. increasing the predator's birth rate, or aggregative response, i.e. attracting a higher density of predators. Our objectives in this study were to determine the aggregative response and 2-prey functional response of a predator and to examine indirect effects over a range of prey densities. We used the clam Macoma balthica and juvenile blue crabs Callinectes sapidus as prey for adult blue crabs. In laboratory experiments, we determined the single-prey functional responses of the crabs to each prey species and the 2-prey functional response. We combined the 2-prey functional response with the known blue crab aggregative response to clams to estimate field predation rates. Our model predicts that at low prey densities, clams and juvenile blue crabs exhibit apparent mutualism, whereas at high clam densities, this relation switches to short-term apparent competition. These unexpected results highlight the need to incorporate multiple aspects of predation at multiple scales when considering indirect effects.KEY WORDS: Predator-prey interactions · Functional response · Indirect effects · Blue crab · Macoma balthicaResale or republication not permitted without written consent of the publisher Mar Ecol Prog Ser 456: 139-148, 2012 increases the predator density (i.e. changes either the predator's numerical or aggregative response), thus increasing predation on the other species (Holt & Lawton 1994). This occurs either through increasing the predator population growth rate (Settle et al. 1996, Carvalheiro et al. 2008 or through a local increase in predator density due to predator movement (Holt & Kotler 1987, Brown & Mitchell 1989, Murakami & Nakano 2002. Study organismsThe blue crab Callinectes sapidus Rathbun, 1896, is an important benthic predator in Chesapeake Bay (Virnstein 1977). Large adult crabs are opportunistic omnivores, feeding primarily on bivalves (~50% of diet) and crustaceans (~30%) as well as fish and polychaetes (Hines et al. 1990). Blue crabs are cannibalistic, with adults feeding on juveniles (Hines & Ruiz 1995). Because cannibalism represents a major source of mortality for juvenile blue crabs, juveniles congregate in shallow waters (<1 m), where adults are less abundant (Hines & Ruiz 1995, and in structured habitats that provide a predation refuge (Everett & Ruiz 1993).Macoma balthica Linnaeus, 1758, is a small (shell length < 40 mm) tellinid clam that is the dominant biomass in unvegetated mud habitats within the mesohaline regions of Chesapeake Bay (Holland et al. 1977) and is a major source of food for blue crabs (Baird & Ulanowicz 1989). M. balthica avoids predation by burying deeply, up to 35 cm, in the sediment (Hines & Comtois 1985)...

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Section: Laboratory Setupmentioning

confidence: 99%

Density-dependent indirect effects: apparent mutualism and apparent competition coexist in a two-prey system

Long¹,

Gamelin²,

Johnson³

et al. 2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Hatchery crabs reared at the Center for Marine Biotechnology were used in all experiments (Zmora et al, 2005). Cages used for both the feeding and growth experiments were constructed with galvanized hardware cloth with a mesh size of 6.5 mm.…”

Section: Crab Feeding Growth and Benthic Prey Availabilitymentioning

confidence: 99%

Effects of anthropogenic shoreline hardening and invasion by Phragmites australis on habitat quality for juvenile blue crabs (Callinectes sapidus)

Long

Grow

Majoris

et al. 2011

Journal of Experimental Marine Biology and Ecology

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“…The knowledge of this part of the ontogeny is not only of intrinsic scientific interest but also a prerequisite for developing hatchery and nursery practices (Davis et al 2004b, Zmora et al 2005, Quinitio 2009). Also, it can be used in forecasting temporal patterns of larval production for fisheries management purposes (Stevens et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Embryonic development of the southern surf crab <em>Ovalipes trimaculatus</em> (Decapoda: Brachyura: Portunoidea)

et al. 2016

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Summary:The embryogenesis of Ovalipes trimaculatus, a member of the highly valued portunid swimming crabs, was studied under nearly constant temperature (13±1°C), salinity (33) and photoperiod (14 h light:10 h dark) conditions. A five-stage scale of embryonic development was defined for the species. Time required to complete development averaged 35.7±2.11 days, showing no significant differences between embryos located in inner, middle and outer portions of the egg mass. The egg chorion was rounded and showed the highest growth in diameter between stages I (morula-blastula-gastrula) and II (primordium of larval structure) and between stages III (appendage formation) and IV (eye formation). Results reported here provide a baseline for optimizing hatchery operations and useful information for management purposes.Keywords: crustacean; crabs, aquaculture; Ovalipes trimaculatus; embryology.Desarrollo embrionario del cangrejo nadador Ovalipes trimaculatus (Decapoda: Brachyura: Portunoidea) Resumen: Se estudió la embriogénesis del cangrejo nadador Ovalipes trimaculatus, miembro de la familia de portúnidos altamente valorados, bajo condiciones constantes de temperatura (13±1°C), salinidad (33) y fotoperíodo (luz 14h:10h oscuridad). Se definió una escala de cinco etapas de desarrollo embrionario para la especie. El tiempo necesario para completar el desarrollo es de 35.7±2.11 días, sin mostrar diferencias significativas entre embriones ubicados en porciones interior, media y exterior de la masa de huevos. Los huevos son esféricos y presentan mayor crecimiento en diámetro entre las etapas I (mórula -blástula -gástrula) y II (primordio de estructuras larvarias) y entre las etapas III (formación de apéndices) y IV (formación de los ojos). Los resultados aquí presentados proporcionan la base para la optimización del cultivo y brindan información útil para el manejo de la especie.Palabras clave: crustáceos; cangrejos; acuicultura; Ovalipes trimaculatus; embriología.Citation/Como citar este artículo: Martelli A., Tapella F., González-Pisani X., Dellatorre F., Barón P.J. 2016. Embryonic development of the southern surf crab Ovalipes trimaculatus (Decapoda: Brachyura: Portunoidea). Sci. Mar. 80(4): 499-509.

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Large-scale juvenile production of the blue crab Callinectes sapidus

Cited by 120 publications

References 9 publications

Density-dependent indirect effects: apparent mutualism and apparent competition coexist in a two-prey system

Density-dependent indirect effects: apparent mutualism and apparent competition coexist in a two-prey system

Effects of anthropogenic shoreline hardening and invasion by Phragmites australis on habitat quality for juvenile blue crabs (Callinectes sapidus)

Embryonic development of the southern surf crab <em>Ovalipes trimaculatus</em> (Decapoda: Brachyura: Portunoidea)

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