Effects of La Niña 98-2000 on the Population Structure of Emerita analoga, Lambayeque, Perú

Alvitres, Víctor; Fupuy, Jorge; Chanamé, Jorge; Chambergo, Adela; Cortez, Miguel Nunez Del Prado

doi:10.4067/s0717-71782002030100039

Cited by 2 publications

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“…Epibiosis affected females, most of them ovigerous. This may be due to the fact that E. analoga presents sexual dimorphism, with females being larger than males (Alvitres et al , 2002). In several decapods, including E. analoga , larger individuals allocate energy into reproduction suspending growth (Siegel, 1984; Dam et al , 2006; Nilssen & Sundet, 2006), hence females would have longer intermoult periods, from 36 days for 10 mm CL females to 44 days for 13.5 mm CL females reared in tanks (Siegel, 1984), favouring spores settlement and development.…”

Section: Discussionmentioning

confidence: 99%

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Effects of epibioticEnteromorphaspp. on the mole crabEmerita analogain the Peruvian central coast

et al. 2008

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Epibiotic interactions between macroalgae and crustaceans have rarely been described. We examined the interaction between the mole crab, Emerita analoga and the opportunistic algae Enteromopha spp. in a sandy beach of the central coast of Peru. Enteromorpha spp. was found fouling the carapace of the mole crab that provides the only stable substrate to spore settlement in the beach environment. Epibiosis prevalence was up to 2.1%, and affected mainly larger, ovigerous females. Prevalence presented a seasonal pattern, with peaks during summer. Mole crab body condition was higher when fouled, whereas fecundity was not affected. Fouled mole crabs burrowed at lower speed, which was reversible by the removal of epibiotic algae. The burrowing depth was not affected by epibiosis. Contrary to the expected, the effects of algal epibiosis on demographic and life history parameters of mole crabs, with the exception of body condition, were mainly neutral but important on behavioural traits.

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Section: Discussionmentioning

confidence: 99%

“…In sandy beaches they play an important role as secondary producers. Being a prey for many crustaceans, fish, birds, and even humans, they occupy a central position in the trophic web of the coastal ecosystem (Alvitres et al , 1998, 2002).…”

Section: Introductionmentioning

confidence: 99%

Effects of epibioticEnteromorphaspp. on the mole crabEmerita analogain the Peruvian central coast

et al. 2008

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“…and Calidris sp.). Alvitres et al (2002) and Contreras et al (2000) indicated that E. analoga lives up to 3.5 years in Peru and northern Chile. Parasites of E. analoga include larval forms of the acanthocephalan Profilicollis altmani, the digenean Maritrema sp., the eucestodes Nybelinia sp.…”

Section: Introductionmentioning

confidence: 99%

Changes in prevalence and intensity of infection of Profilicollis altmani (Perry, 1942) cystacanth (Acanthocephala) parasitizing the mole crab Emerita analoga (Stimpson, 1857): an El Niño cascade effect?

et al. 2007

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Prevalence and intensity changes in cystacanths of the acanthocephalan Profilicollis altmani parasitizing the mole crab Emerita analoga under El Niño (EN) and non-El Niño (non-EN) conditions are analyzed. Both, mean intensity and prevalence of infection by P. altmani differ significantly for the whole size range and for each size class of 10 mm intervals (except prevalence for size classes exceeding 18 mm carapace length) between EN (1998) and non-EN (2002) years, without observed size distribution differences in the intermediate host E. analoga under either condition. Significant difference in infestation rates of the intermediate host E. analoga is discussed as being an EN cascade effect on predators such as sea birds (i.e., Larus spp. and Calidris sp.), acting as definitive hosts of P. altmani, and which are known to decrease significantly in abundance during EN.

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Effects of La Niña 98-2000 on the Population Structure of Emerita analoga, Lambayeque, Perú

Cited by 2 publications

References 0 publications

Effects of epibioticEnteromorphaspp. on the mole crabEmerita analogain the Peruvian central coast

Effects of epibioticEnteromorphaspp. on the mole crabEmerita analogain the Peruvian central coast

Changes in prevalence and intensity of infection of Profilicollis altmani (Perry, 1942) cystacanth (Acanthocephala) parasitizing the mole crab Emerita analoga (Stimpson, 1857): an El Niño cascade effect?

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