Accelerated Hatching of Southern Leopard Frog (Rana sphenocephala) Eggs in Response to the Presence of a Crayfish (Procambarus nigrocinctus) Predator

Saenz, Daniel; Johnson, James B.; Adams, Cory K.; Dayton, Gage H.

doi:10.1643/ce-02-172r1

Cited by 35 publications

(21 citation statements)

References 23 publications

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“…Hatching plasticity in response to egg and/or larval predators and pathogens is a more recent discovery (Sih andMoore 1993, Warkentin 1995). We now know that a variety of amphibian species, and a few fish and reptile species, show adaptive shifts in hatching timing in response to biotic risks (Chivers et al 2001, Laurila et al 2002, Wedekind 2002, Saenz et al 2003, Kusch and Chivers 2004, Moreira and Barata 2005, Vonesh 2005, GomezMestre et al 2006.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Adaptive Plasticity: Risk‐sensitive Hatching in Neotropical Leaf‐breeding Treefrogs

Gómez-Mestre

Wiens

Warkentin

2008

Ecological Monographs

119

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Abstract. Adaptive plasticity at switch points in complex life cycles (e.g., hatching, metamorphosis) is well known, but the evolutionary history of such plasticity is not. Particularly unclear is how a single plastic response (e.g., shifts in hatching timing) evolves to respond to different threats and cues (e.g., abiotic and biotic). We conducted a comparative phylogenetic study of hatching plasticity in a group of frogs with arboreal embryos to determine when risk-accelerated hatching evolved in the clade, whether responses to two common egg-stage risks (snake predation and flooding) evolved independently, and whether the overall capacity for hatching plasticity was evolutionarily more conservative than responses to specific cues. Red-eyed treefrogs (Agalychnis callidryas) hatch early to escape from several egg-stage risks but otherwise hatch later, improving larval survival with predators. We reconstructed a phylogeny for Agalychnis and related genera based on three mitochondrial and four nuclear genes. We quantified onset of hatching competence, spontaneous hatching timing, responses to egg-stage risks, and costs of premature hatching in Agalychnis and Pachymedusa. We also assessed hatching plasticity in a basal phyllomedusine, Cruziohyla calcarifer. The capacity to hatch ;30% before the spontaneous hatching age appears ancestral for phyllomedusines, with little change over ;34-50 million years among the species examined. A strong hatching response to flooding, with no mortality of hatching-competent eggs, is similarly ancient and conserved. Premature hatchlings of Agalychnis and Pachymedusa are more vulnerable to fish predation than are full-term hatchlings, indicating a conserved risk trade-off across hatching that would make plasticity advantageous. In contrast, the hatching response to snake attack has undergone major changes at least twice in the Agalychnis-Pachymedusa clade, with two species showing substantially lower escape success than the others. Responses to different threats have thus evolved independently. The capacity for switch point plasticity may be evolutionarily more stable than the response to individual stage-specific threats.

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Section: Introductionmentioning

confidence: 99%

Evolution of Adaptive Plasticity: Risk‐sensitive Hatching in Neotropical Leaf‐breeding Treefrogs

Gómez-Mestre

Wiens

Warkentin

2008

Ecological Monographs

119

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“…For instance, in some cases, predators feed on both egg and larval stages. Without assessment of relative, stage-speciWc risk it is diYcult to predict how embryos should respond, or to assess the adaptive value of particular responses (Laurila et al 2001;Schalk et al 2002;Johnson et al 2003;Saenz et al 2003). Moreover, responses to subsets of cues in experiments may not always reXect responses to natural predation.…”

Section: Introductionmentioning

confidence: 99%

To hatch and hatch not: similar selective trade-offs but different responses to egg predators in two closely related, syntopic treefrogs

Gómez-Mestre

Warkentin

2007

Oecologia

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Risk-sensitive hatching is adaptive for species facing a trade-off between egg-stage and post-hatching risks, and environmental variation in one or both stages. Such plasticity has been found in amphibians, fishes, reptiles and spiders, with red-eyed treefrogs (Agalychnis callidryas) being the best-studied case. We assessed hatching plasticity and egg- and larval-stage risks in a closely related, syntopic species, the gliding leaf-frog (Agalychnis spurrelli). We found a lower hatching response to egg-eating snakes in A. spurrelli (9-28% of embryos escaped) than in A. callidryas (59-80% escaped). Levels of snake predation were similarly high for clutches of both species monitored at a pond in Costa Rica, and in fish predation experiments early-hatched A. spurrelli tadpoles were more vulnerable than later hatchlings, as has been shown for A. callidryas. A. spurrelli thus face a risk trade-off similar to A. callidryas, and likely would benefit from predator-induced hatching; their lower responsiveness to snakes appears nonadaptive. A. spurrelli embryos showed a stronger hatching response (57% hatched in 1 h) to submergence underwater than to snake attacks even though submergence is a less frequent risk. This suggests they have a greater capacity for early hatching than is expressed in the context of snake attacks, but have much lower sensitivity to snake cues than to flooding cues. Development in A. spurrelli is accelerated compared to syntopic A. callidryas, and spontaneous hatching is earlier and more synchronous. This is congruent with predictions based on selection by egg predators in the absence of a strong escape hatching response.

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“…by bedform alterations in riffles (STATZNER, PELTRET and TOMANOVA, 2003), enhance benthic algal production through physical activity, reduce growth and survival of bryozoan communities, reduce macroinvertebrate taxon richness (CALLAGHAN and KARLSON, 2002;STENROTH and NYSTRÖM, 2003), play an important role in the food web, e.g. by becoming the dominant food source of the European mink (Mustela lutreola) or the strictly protected otter (Lutra lutra) in summer under certain conditions (LANSZKY and MOLNÁR, 2003;SIDOROVICH et al, 2002), and even their presence proved to have significant effect on prey organisms such as accelerating the hatching of amphibian eggs (SAENZ et al, 2003). In addition, they are also used commercially and their biomarker response can be used to detect contaminant release (TRIEBSKORN et al, 2002).…”

Section: Resultsmentioning

confidence: 99%

Native and Alien Decapoda Species in Hungary:distribution, Status, Conservation Importance

Puky

Reynolds

Schád³

2005

Bull. Fr. Pêche Piscic.

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Three native (Astacus astacus, Astacus leptodactylus, Austropotamobius torrentium) and three alien (Orconectes limosus, Pacifastacus leniusculus, Eriocheir sinensis)Decapoda species have been found in Hungary so far. A. astacus is the most widespread Decapoda species in Hungary. A. leptodactylus might be considered as the least studied. The distribution of A. torrentium in Hungary is restricted to mountain streams with occasional data on its presence in the adjacent section of the River Danube. The indigenous species A. torrentium and, especially A. astacus, are declining while A. leptodactylus seems to have stable populations. The detection of alien species accelerated at the turn of the century: O. limosus was found at new sites, P. leniusculus was first recorded in the Gyöngyös-stream near the Austrian border in 2000, E. sinensis in the main arm of the Danube at Budapest in November 2003. As there is a lack of information even on the commonest species, conservation-oriented mapping is necessary to follow the distribution changes of Decapoda in Hungary.Key-words: crayfish, alien species, Hungary, distribution, conservation. LES DÉCAPODES INDIGÈNES ET EXOTIQUES EN HONGRIE

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Accelerated Hatching of Southern Leopard Frog (Rana sphenocephala) Eggs in Response to the Presence of a Crayfish (Procambarus nigrocinctus) Predator

Cited by 35 publications

References 23 publications

Evolution of Adaptive Plasticity: Risk‐sensitive Hatching in Neotropical Leaf‐breeding Treefrogs

Evolution of Adaptive Plasticity: Risk‐sensitive Hatching in Neotropical Leaf‐breeding Treefrogs

To hatch and hatch not: similar selective trade-offs but different responses to egg predators in two closely related, syntopic treefrogs

Native and Alien Decapoda Species in Hungary:distribution, Status, Conservation Importance

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