The Significance of Case Material Selection for the Survival of Caddis Larvae

Otto, Christian; Svensson, Britt-Marie

doi:10.2307/4231

Cited by 104 publications

(114 citation statements)

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“…Litters of Talauma ovata and Richeria grandis were used frequently to build case, probably due its higher abundance, quality resources and faster losses of leaf mass in all treatments. This corroborates some studies that suggest that Phylloicus have preference for some plants species, where the leaf litter used to build case is very flexible and depends on its abundance in its habitats (Moretti et al 2009, Hanna 1961, Otto & Svensson 1980.…”

Section: Shredding Behavior × Temperature Gradientsupporting

confidence: 77%

Experimental assessment of temperature increase and presence of predator carcass changing the response of invertebrate shredders

Navarro

Rezende²,

Júnior

2013

Biota Neotrop.

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Experimental assessment of temperature increase and presence of predator carcass changing the response of invertebrate shredders. Biota Neotrop. 13(4): http://www.biotaneotropica.org.br/v13n4/en/abstract?article+bn00313042013Abstract: The role of the invertebrate shredders in leaf decomposition process in tropical lotic ecosystems has been explored only recently. In addition to the influence of the quality of litter and the temperature, the risk of predation generally results in changes on the survival and behavior of invertebrate shredders. The aim of this study was to observe the responses of the invertebrate shredders to different species of leaf litters (Experiment 1: Talauma ovata and Inga laurina ; Experiment 2:Talauma ovata , Inga laurina and Richeria grandis ) under gradual temperature rise (24 °C, 26 °C, 28 °C, 30 °C, 32 °C), in the presence (Experiment 2) and absence (Experiment1) of fish (Astyanax sp.) carcasses, as well as to observe the possible consequences of the leaf mass loss (LML). The results from the first experiment suggest that the quality of the litter was capable of changing the feeding preference of the invertebrate shredders, regardless of temperature. In the second experiment, the leaf mass loss was faster in litter with higher quality (Talauma ovate and Richeria grandis ); in addition, we observed that the exploration of these resources resulted in the case-building in the presence of fish carcass. The negative correlation of leaf mass loss of Inga laurina in relation to temperature in the presence of fish carcass probably occurred due to an accelerated metabolic, respiratory and cardiac rates. Apparently, this process may have led to an increased shredding activity on the litters of better quality in relation to the Inga laurina. This fact may be related to less energy consumption, so as to meet their energy demands more efficiently. Keywords: feeding activity, global warming, decomposition. NAVARRO, F.K.S.P., REZENDE, R.S. & GONÇALVES, J.F.Jr. Avaliação experimental de elevação da temperatura e a presença de carcaça do predador alterando a resposta de invertebrados fragmentadores. Biota Neotrop. 13(4): http://www.biotaneotropica.org.br/v13n4/pt/abstract?article+bn00313042013Resumo: O papel dos invertebrados fragmentadores no processo de decomposição foliar em ecossistemas lóticos tropicais vem sendo recentemente explorado. Além da influência da qualidade do detrito e da temperatura, o risco de predação geralmente implica alterações sobre a sobrevivência e comportamento de invertebrados fragmentadores. O objetivo deste estudo foi verificar as respostas dos invertebrados fragmentadores a diferentes espécies de detritos foliares (Experimento 1: Talauma ovata e Inga laurina; Experimento 2: Talauma ovata, Inga laurina e Richeria grandis) sob elevações graduais de temperatura (24 °C, 26 °C, 28 °C, 30 °C, 32 °C), na presença (Experimento 2) e ausência (Experimento1) de carcaças de peixes (Astyanax sp.), assim como verificar as possíveis consequências sobre a perda de massa foliar (PMF). Os...

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Section: Shredding Behavior × Temperature Gradientsupporting

confidence: 77%

Experimental assessment of temperature increase and presence of predator carcass changing the response of invertebrate shredders

Navarro

Rezende²,

Júnior

2013

Biota Neotrop.

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“…The case is composed of sand grains, and silk is applied as`mortar' and braces between grains (Wallace et al 1990), giving a very strong end-product (Otto & Svensson 1980). The larval growing period is relatively long.…”

Section: Methodsmentioning

confidence: 99%

Developmental trade–offs in caddis flies: increased investment in larval defence alters adult resource allocation

Stevens

Hansell

Freel

et al. 1999

Proc. R. Soc. Lond. B

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Developmental trade-o¡s in resource allocation across life-history stages and between di¡erent body parts are predicted by life-history theories. However, there is very little empirical evidence that these occur. We investigated these trade-o¡s in caddis £ies by experimentally manipulating larval case construction and thereby silk expenditure. Case building diverts protein resources away from larval stores, which are of major importance to adult development in species with little or no adult feeding. We induced ¢fth-instar Odontocerum albicorne to build new cases and examined the consequences for the morphology of the resulting adults. Rebuilding did not alter larval food consumption or the date of entering pupation, but shortened the duration of the pupal period. Adults that had been induced to expend more silk as larvae had lighter thoraces and smaller wings than the controls, but their abdomens did not di¡er signi¢cantly in mass or nitrogen content. These results suggest a trade-o¡ between larval silk production and the pattern of resource allocation within the adult. The maintenance of the abdomen is likely to preserve reproductive potential, while the reduction in thoracic and wing investment will have negative consequences for £ight and associated activities, and possibly for adult longevity.

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“…Some animals, such as cased caddisfly larvae and hermit crabs, decrease predation risk through the use of exogenous materials to cover the softer, more vulnerable parts of their bodies (Otto and Svensson 1980;Johansson 1991;Conover 1978;Borjesson and Szelistowski 1989;Cote et al 1998). This phenomenon represents an interesting interface between morphology and behaviour, as behavioural processes yield what could be functionally regarded as morphological structures (Nislow and Molles 1993).…”

Section: Introductionmentioning

confidence: 99%

“…Some stream-dwelling caddisfly larvae of the family Limnephilidae show polymorphism in case material, with some individuals building an organic case and others a mineral case (Molles and Nislow 1991;Nislow and Molles 1993;Otto and Svensson 1980). This variability is partly ontogenetic (Otto and Svensson 1980), but it may also be due to variation in predation risk, that is, individuals could use different materials to build the case depending on the presence or absence of predators.…”

Section: Introductionmentioning

confidence: 99%

“…This variability is partly ontogenetic (Otto and Svensson 1980), but it may also be due to variation in predation risk, that is, individuals could use different materials to build the case depending on the presence or absence of predators. Mineral cases are usually heavier than organic ones and composed of more pieces, so they are more costly to carry and build (Otto and Svensson 1980;Stevens et al 1999;Otto 2000), but they usually withstand predator attacks more efficiently due to a greater resistance to crushing (Nislow and Molles 1993;Otto and Svensson 1980).…”

Section: Introductionmentioning

confidence: 99%

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Case selection by a limnephilid caddisfly [Potamophylax latipennis (Curtis)] in response to different predators

Boyero

Rincón

Bosch

2005

Behav Ecol Sociobiol

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Some organisms use morphological structures obtained by behavioural processes to lower mortality by predation. We test whether larvae of the limnephilid caddisfly Potamophylax latipennis (Curtis) vary their responses to the presence of different predators (dragonfly naiads, fire salamander larvae or brown trout) by choosing organic or mineral cases. We offered both case types to larvae, and simulated differences in predation risk using water conditioned with chemicals from the different predators. Our results show that Potamophylax larvae detect and discriminate predators using water-borne chemical cues and alter their choice of case type according to the perceived predation risk. Moreover, the distribution of larvae bearing cases of different anti-predator value matches the spatial variation in predation risk in the field.

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The Significance of Case Material Selection for the Survival of Caddis Larvae

Cited by 104 publications

References 18 publications

Experimental assessment of temperature increase and presence of predator carcass changing the response of invertebrate shredders

Experimental assessment of temperature increase and presence of predator carcass changing the response of invertebrate shredders

Developmental trade–offs in caddis flies: increased investment in larval defence alters adult resource allocation

Case selection by a limnephilid caddisfly [Potamophylax latipennis (Curtis)] in response to different predators

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