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Adaptations of two specialist herbivores to movement on the hairy leaf surface of their host, Solanum guaraniticum Hassl (Solanaceae) Rev. Bras. entomol.
Medeiros,Lenice; Boligon,Danessa S..
Plant trichomes can difficult the attachment and movement of small insects. Here, we examine the hypothesis that the success on the use of densely haired hosts by two cassidine species is determined by differential morphology and behavior. Larvae of Gratiana graminea (Klug, 1829) and Gratiana conformis (Boheman, 1854) move on the leaf surface of their host, Solanum guaraniticum Hassl by anchoring their tarsungulus on the trichome rays or by inserting the tarsungulus tip directly into epidermis. This kind of movement is only possible due to a similar tarsungulus shape among the species. Tarsungulus growth pattern is also similar between species, being relatively small on the posterior aperture, matching the diameter of the host plant trichome rays. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cassidinae; Gratiana; Morphological adaptation; Tarsungulus; Trichomes.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262007000200011
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Dermal lip protuberances associated with aquatic surface respiration in juveniles of the piscivorous characid Salminus brasiliensis (Actinopterygii: Characidae) Neotropical Ichthyology
Scarabotti,Pablo A.; Julieta Parma,M.; López,Javier A.; Ghirardi,Romina.
Some South American freshwater fishes can improve their capability of aquatic surface respiration (ASR) by developing dermal lip protuberances in the lower jaw. This adaptation was thought to be limited to omnivorous or herbivorous fishes. The present work provides the first evidence that juveniles of a piscivorous characid, Salminus brasiliensis, develop dermal lip protuberances during periods of hypoxia in floodplain ponds of the Salado River, in Argentina. The protuberance of S. brasiliensis involves dermal portions of both jaws exhibiting lateral lobes on the sides of the mouth arranged in the vertical plane. Water dissolved oxygen concentrations less than or equal to 1.05 mgl-1 were associated with a remarkable increase in lip protuberance. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hypoxia; Morphological adaptation; Lip extension; Floodplain pond; Argentina.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000300013
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Responses and adaptations of collembolan communities (Hexapoda: Collembola) to flooding and hypoxic conditions PAB
Marx,Michael Thomas; Wild,Anna-Katharina; Knollmann,Ulrich; Kamp,Günter; Wegener,Gerhard; Eisenbeis,Gerhard.
Standard ecological methods (pitfall traps, trunk eclectors and soil cores) were used to evaluate collembolan community responses to different flooding intensities. Three sites of a floodplain habitat near Mainz, Germany, with different flooding regimes were investigated. The structures of collembolan communities are markedly different depending on flooding intensity. Sites more affected by flooding are dominated by hygrophilic and hygrotolerant species, whereas the hardwood floodplain is dominated by mesophilic species. The survival strategies of the hygrophilic and hygrotolerant species include egg diapause and passive drifting. The physiological adaptations to hypoxic conditions of several collembolan species were analyzed using a microcalorimeter. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Behavioral adaptation; Ecological adaptation; Egg diapause; Inundation; Morphological adaptation; Physiological adaptation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800032
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Responses and adaptations of collembolan communities (Hexapoda: Collembola) to flooding and hypoxic conditions. Repositório Alice
MARX, M. T.; WILD, A.-K.; KNOLLMANN, U.; KAMP, G.; WEGENER, G.; EISENBEIS, G..
Abstract ? Standard ecological methods (pitfall traps, trunk eclectors and soil cores) were used to evaluate collembolan community responses to different flooding intensities. Three sites of a floodplain habitat near Mainz, Germany, with different flooding regimes were investigated. The structures of collembolan communities are markedly different depending on flooding intensity. Sites more affected by flooding are dominated by hygrophilic and hygrotolerant species, whereas the hardwood floodplain is dominated by mesophilic species. The survival strategies of the hygrophilic and hygrotolerant species include egg diapause and passive drifting. The physiological adaptations to hypoxic conditions of several collembolan species were analyzed using a...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Behavioral adaptation; Ecological adaptation; Egg diapause; Inundation; Morphological adaptation; Physiological adaptation.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/660991
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