Processes regulating early post-settlement habitat use in a subtidal assemblage of brachyuran decapods

Pardo, Luis Miguel; Palma, Álvaro T.; Prieto, Catalina P.; Sepulveda, Patricia; Valdivia, Isabel M.; Ojeda, F. Patricio

doi:10.1016/j.jembe.2006.12.024

Cited by 50 publications

(35 citation statements)

References 44 publications

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“…6). Ovigerous females of Taliepus dentatus occur year round in central Chile and, except for a short period in winter, hatching takes place during the entire year, although it peaks during the austral spring and summer (Fagetti & Campodonico 1971, Pardo et al 2007. Considering that larval development in this species takes weeks to months, we can assume that T. dentatus larvae are exposed to both temperature extremes during the planktonic phase, before they return to the benthos and recruit to the adult populations.…”

Section: Discussionmentioning

confidence: 99%

Thermal tolerance of larval stages of the Chilean kelp crab Taliepus dentatus

Storch¹,

Fernández²,

Navarrete³

et al. 2011

Mar. Ecol. Prog. Ser.

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Physiological responses of larval stages can differ from those of the adults, affecting key ecological processes. Therefore, developing a mechanistic understanding of larval responses to environmental conditions is essential vis-à-vis climate change. We studied the thermal tolerance windows, defined by lower and upper pejus (Tp) and critical temperatures (Tc), of zoea I, II, and megalopa stages of the Chilean kelp crab Taliepus dentatus. Tp limits determine the temperature range where aerobic scope is maximal and functioning of the organism is unrestrained, and were estimated from direct observations of larval activity. Tc limits define the transition from aerobic to anaerobic metabolism, and were estimated from the relationship between standard metabolic rate and temperature. Zoea I showed the broadest, zoea II an intermediate, and megalopae the narrowest tolerance window (Tp). Optimum performance in megalopae was limited to Tp between 11 and 15°C, while their Tc ranged between 7 and 19°C. Although Tc may be seldom encountered by larvae, the narrower Tp temperatures can frequently expose larvae to unfavorable conditions that can drastically constrain their performance. Temperatures beyond the Tp range of megalopae have been observed in most spring and summer months in central Chile, and can have important consequences for larval swimming per formance and impair their ability to avoid predators or settle successfully. Besides the well-documented effects of temperature on development time, variability in field temperatures beyond Tp can affect performance of particular larval stages, which could drive large-scale variability in recruitment and population dynamics of T. dentatus and possibly other invertebrate species.KEY WORDS: Metabolic rate · Critical temperature · Heart beat rate · Larvae · Megalopa · Sea surface temperature · Recruitment · ZoeaResale or republication not permitted without written consent of the publisher

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Section: Discussionmentioning

confidence: 99%

Thermal tolerance of larval stages of the Chilean kelp crab Taliepus dentatus

Storch¹,

Fernández²,

Navarrete³

et al. 2011

Mar. Ecol. Prog. Ser.

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“…Panels were deployed along the periphery of habitat patches in a balanced design across sites. Panels, anchored flush with the benthos, were deployed in triplicate, with one panel of each vegetation structure placed within each habitat type in a fully crossed design (n = 36 panels total or 12 per structure type across habitats and 12 within each habitat type; method as in Lindsey et al 2006, Pardo et al 2007; Fig. 2A).…”

Section: Field Studies: Recruitmentmentioning

confidence: 99%

“…(1) Mortality would lead to decreasing recruit abundance over time. (2) Redistribution could also lead to decreased occurrence, but secondary dispersal is unlikely to be confounding because the sampled crabs did not exceed 20 mm CW, the expected size at secondary dispersal (Lipcius et al 2007, Pardo et al 2007, Johnston & Lipcius 2012. (3) It is possible that recruit attrition was due in part to less effective capture of large or fast-swimming individuals with the panel retrieval method; however, finfish and swimming crabs ranging in size from 0.5 to 100 mm were regularly captured.…”

Section: Recruitmentmentioning

confidence: 99%

Mangrove expansion into temperate marshes alters habitat quality for recruiting Callinectes spp.

Johnston¹,

Caretti²

2017

Mar. Ecol. Prog. Ser.

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“…Such changes are mostly adaptations to sequential exploitation of different niches during growth and are often accompanied by habitat shifting and, consequently, the spatial structuration of the populations by size (Pardo et al 2007). The efficient exploitation of ontogenetic niches generally requires different morphologies and colour patterns associated with changing diets (Jensen and Asplen 1998) and predatory risks Steneck 2001, Reuschel andSchubart 2007).…”

Section: Introductionmentioning

confidence: 99%

Habitat use, relative growth and size at maturity of the purple stone crab <em>Platyxanthus crenulatus</em> (Decapoda: Brachyura), calculated under different models

Farias¹,

Luppi²,

Spivak³

2014

Sci. Mar.

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Summary:We describe the most noteworthy changes occurring during the post-metamorphic phase in both sexes of the purple stone crab Platyxanthus crenulatus. Spatial structure of the populations by size and early changes in colour pattern and relative growth of chelae suggest an ontogenic migration from intertidal to deeper waters. Before reaching maturity and laying eggs, females undergo a tight sequence of morpho-physiologic changes over a narrow size range (44-64 mm carapace width [CW]). In contrast, males undergo two main phases related to sexual maturity. Early in their lives, they develop sperm and accelerate the relative growth of the chelae (35-45 mm CW). Morphologic maturity of males comes later, when relative growth rate reaches the maximum and decelerate (65-70 mm CW). Adult males are larger and develop conspicuously largest chelae than females. Morphometric analyses were performed by two different techniques: the traditional procedure, which describes relative growth relationships as power functions; and an alternative, smoothing spline-based model that is nondependent on previous assumptions. The results of the alternative analysis were coherent with other reproductive indicators and ancillary observations, allowing a more comprehensive understanding of the relative growth. We provide supporting material containing the respective script written in R program to be used freely in future studies.Keywords: sexual maturity; stone crabs; southwestern Atlantic; alternative methods; relative growth.Uso de hábitat, crecimiento relativo y talla de madurez, calculada mediante diferentes modelos, del cangrejo violeta Platyxanthus crenulatus (Decapoda: Brachyura) Resumen: Se describen los eventos más remarcables durante la ontogenia de la fase post-metamórfica del cangrejo violeta de las rocas Platyxanthus crenulatus. Las poblaciones estudiadas aparecen estructuradas por talla, lo que sumado a cambios tempranos en el patrón de coloración y en la tasa de crecimiento relativo de las quelas de ambos sexos, sugiere la existencia de una migración ontogénica desde el intermareal hacia aguas más profundas. Antes de alcanzar la madurez y extruir huevos, las hembras atraviesan una serie de cambios morfo-fisiológicos en un rango de tallas estrecho (44-64 mm). En contraste los machos muestran dos fases bien diferenciadas en relación a la madurez sexual. Tempranamente desarrollan esperma y aceleran el crecimiento relativo de las pinzas (35-45 mm). La madurez morfológica se alcanza posteriormente cuando la tasa de crecimiento relativo alcanza su máximo y comienza a desacelerarse (65-70 mm). Los machos adultos son más grandes y tienen quelas de mayor tamaño que las de las hembras. Los análisis morfométricos fueron realizados aplicando paralelamente dos técnicas diferentes: el procedimiento tradicional, que describe al crecimiento relativo como una función potencial, y un método alternativo, no dependiente de supuestos a priori, basados en splines. Los resultados del análisis alternativo fueron coherentes con los demás indicador...

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Processes regulating early post-settlement habitat use in a subtidal assemblage of brachyuran decapods

Cited by 50 publications

References 44 publications

Thermal tolerance of larval stages of the Chilean kelp crab Taliepus dentatus

Thermal tolerance of larval stages of the Chilean kelp crab Taliepus dentatus

Mangrove expansion into temperate marshes alters habitat quality for recruiting Callinectes spp.

Habitat use, relative growth and size at maturity of the purple stone crab <em>Platyxanthus crenulatus</em> (Decapoda: Brachyura), calculated under different models

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