Movement patterns and trajectories of ovigerous blue crabs Callinectes sapidus during the spawning migration

Carr, Sarah D.; Tankersley, Richard A.; Hench, James L.; Forward, Richard B.; Luettich, Richard A.

doi:10.1016/j.ecss.2004.02.012

Cited by 81 publications

(42 citation statements)

References 21 publications

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“…The use of the rate of decrease in hydrostatic pressure as a cue for vertical migration may also help explain the discontinuous migratory behavior observed in the present study and a concurrent study of free-swimming crabs using biotelemetry (Carr et al 2004). In both of these studies, crabs exhibited periods of active vertical swimming separated by periods on the bottom.…”

Section: Discussionmentioning

confidence: 73%

Testing a selective tidal‐stream transport model: Observations of female blue crab (Callinectes sapidus) vertical migration during the spawning season

Hench¹,

Forward²,

Carr³

et al. 2004

Limnology & Oceanography

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Female blue crabs, Callinectes sapidus, mate in estuaries and undergo a seaward spawning migration to release larvae. According to the prevailing model, females with mature embryos use nocturnal ebb-tide transport (ETT) to move seaward, release larvae, and then reverse to nocturnal flood-tide transport (FTT) to move back into the estuary. We tested this model by examining the vertical migratory behavior of ovigerous and post-larval release female crabs. Simultaneous physical-biological data were collected for 38 d during Aug 2002-Sep 2002 in Bogue Sound, North Carolina. Crab water-column positions were determined with miniature internally recording pressure sensors. Local current and water properties were measured, and crab vertical migration times relative to observed currents were used to determine ETT and FTT behavior. Surface censuses of free-swimming crabs on 19 nocturnal ebbs were used to complement the intensive studies of individual crabs. The study found that (1) the pressure sensors had a measurable but small effect on swimming, (2) females migrated during day and night ebb tides, (3) females used ETT throughout embryo development, (4) ETT corresponded to the rate of decrease in water level (hydrostatic pressure), (5) larvae were released at high tide or when water level was falling, often within several hours of sunrise, and (6) post-larval release females continued ETT and did not switch to FTT. Thus, the data did not support the prevailing ETT-FTT reversal model. Rather, females continue ETT into coastal areas, releasing subsequent clutches farther seaward, which increases the potential for successful larval transport to favorable offshore developmental areas.For many marine species, successful recruitment entails adult migration out of an estuary and subsequent larval transport into an estuary. While substantial literature is accumulating on the latter process (e.g., Weinstein 1988; Crowder and Werner 1999;Epifanio and Garvine 2001), 1 To whom correspondence should be addressed. Present address: Environmental Fluid Mechanics Laboratory, Stanford University, Stanford, California 94305-24-4020 (jhench@stanford.edu). AcknowledgmentsWe thank Pia Moisander and Josh Osterberg for valuable assistance in the field. Sean Powers and two anonymous reviewers provided helpful suggestions on the manuscript.

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Section: Discussionmentioning

confidence: 73%

Testing a selective tidal‐stream transport model: Observations of female blue crab (Callinectes sapidus) vertical migration during the spawning season

Hench¹,

Forward²,

Carr³

et al. 2004

Limnology & Oceanography

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“…The influence of these small-scale events on larval dispersal over periods of weeks is unknown. On a larger scale, a number of motile species, including snappers, herring, and blue crabs, move to particular locations for spawning (Carr et al, 2004;Heyman et al, 2005). In the temporal domain, many coral species participate in annual mass spawning events, with more than 60% of species spawning over the course of several days (Babcock et al, 1994), and crabs and barnacles tend to release their larvae at certain phases of the tide or the day (Morgan, 1995;Macho et al, 2005).…”

Section: Breaking the Behavioral Black Boxmentioning

confidence: 99%

Larval Transport and Dispersal in the Coastal Ocean and Consequences for Population Connectivity

Pineda¹,

Hare²,

Sponaugle³

2007

Oceanog.

569

444

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“…Aggregative behaviour within genders has also been related to other causes, such as the need to look for appropriate habitat for moulting (Reid et al 1994, Sampedro and González-Gurriarán 2004 or for hatching (i.e. females look for suitable sites to improve dispersal and survival of recently hatched larvae) (Hicks 1985, Zeng and Naylor 1997, Carr et al 2004). Survival of larvae may also be related to larval aggregation behaviour in addition to dispersal patterns, which are assumed to be low given the large size of the eggs and lower number of embryos that P. sivado females carry, when compared with other caridean shrimps (Company et al 2001).…”

Section: Size Dimorphism and Sex Ratiomentioning

confidence: 99%

Sexual dimorphism and associated population characteristics in the benthopelagic shrimp <em>Pasiphaea sivado</em> (Crustacea: Caridea: Pasiphaeidae)

2017

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Summary: Morphological and size dimorphism between genders of the benthopelagic shrimp Pasiphaea sivado are reported for the first time in the present work. All five pleopod protopods of females are thinner and more elongated than the male pleopod protopods, which in turn are anteriorly rounded and have robust shapes. The shape variability of the second pleopod protopods was also analysed using geometric morphometrics techniques which clearly differentiated between the thinner, elongated shape of the females and the robust shape of males. An important application of the observations of sexual dimorphism in pleopod shape in adult P. sivado is, from now on, the ability to quickly assess the gender of individuals when fisheries and population biology studies are carried out in the field unaided by a magnifying. A critical size from which the population sex ratio biases changed from female to male dominance was found in all studied western Mediterranean populations of P. sivado. This critical size different and became progressively smaller from populations in the Alboran Sea to populations in the Catalan Sea. Concerning sex ratio, no significant tendency of gender segregation was found across the bathymetric distribution range of the species, suggesting that this species does not perform differential depth distribution by gender.Keywords: geometric morphometrics; size dimorphism; population size structure; size at maturity; sex ratio, sex identification, juvenile size.Dimorfismo sexual y características poblacionales asociadas en el camarón bentopelágico Pasiphaea sivado (Crustacea: Caridea: Pasiphaeidae) Resumen: Se estudia por vez primera el dimorfismo sexual morfológico y de talla en el camarón bentopelágico Pasiphaea sivado. Los cinco protopodios de los pleópodos de las hembras son más esbeltos y alargados que los de los machos, los cuales son redondeados anteriormente y de aspecto más robusto. La variabilidad de forma de los protopodios de los segundos pleó-podos se ha analizado mediante técnicas de morfometría geométrica, las cuales diferenciaron claramente las formas esbeltas y alargadas de las hembras respecto a las de los machos. Una importante aplicación práctica de estos resultados es que van a permitir una identificación rápida del sexo, sin auxilio de lupa, de los individuos adultos en estudios de pesquerías y de biología de poblaciones. Se identificó una talla crítica a partir de la cual los machos dominan significativamente su proporción en todas las poblaciones geográficas estudiadas en el Mediterráneo occidental. Esta talla es distinta y progresivamente menor desde las poblaciones más occidentales en el mar de Alborán hasta las más nororientales en el mar Catalán. Por lo que respecta a la proporción de sexos, no se detectó ninguna tendencia significativa a lo largo de la distribución batimétrica de la especie, lo que sugiere que la especie no lleva a cabo distribución diferencial entre machos y hembras en relación a la profundidad.Palabras clave: morfometría geométrica; dimorfismo de talla; estructu...

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Movement patterns and trajectories of ovigerous blue crabs Callinectes sapidus during the spawning migration

Cited by 81 publications

References 21 publications

Testing a selective tidal‐stream transport model: Observations of female blue crab (Callinectes sapidus) vertical migration during the spawning season

Testing a selective tidal‐stream transport model: Observations of female blue crab (Callinectes sapidus) vertical migration during the spawning season

Larval Transport and Dispersal in the Coastal Ocean and Consequences for Population Connectivity

Sexual dimorphism and associated population characteristics in the benthopelagic shrimp <em>Pasiphaea sivado</em> (Crustacea: Caridea: Pasiphaeidae)

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