{"id":958,"date":"2020-06-13T03:56:19","date_gmt":"2020-06-13T06:56:19","guid":{"rendered":"https:\/\/www.ufrgs.br\/ictio\/?p=958"},"modified":"2020-06-13T06:01:50","modified_gmt":"2020-06-13T09:01:50","slug":"english-relationship-between-diet-and-pharyngeal-jaw-morphology-of-crenicichla-species-cichliformes-cichlidae-in-streams-from-uruguay-and-jacui-basins-southern-brazil","status":"publish","type":"post","link":"https:\/\/www.ufrgs.br\/ictio\/2020\/06\/13\/english-relationship-between-diet-and-pharyngeal-jaw-morphology-of-crenicichla-species-cichliformes-cichlidae-in-streams-from-uruguay-and-jacui-basins-southern-brazil\/","title":{"rendered":"Relationship between diet and pharyngeal jaw morphology of Crenicichla species (Cichliformes: Cichlidae) in streams from Uruguay and Jacu\u00ed basins, Southern Brazil"},"content":{"rendered":"

Fernanda Kuhn,\u00a0Mayara Pereira Neves,\u00a0Karine Orlandi Bonato\u00a0&\u00a0Clarice Bernhardt Fialho<\/p>\n

Abstract<\/h2>\n

Cichlidae have a magnificent ecological versatility that provides the species to explore many trophic niches, and behavioural biology. This versatility was achieved by modifications in the cranial and pharyngeal apparatus of cichlids. Accordingly, we aim to examine the relationships between pharyngeal morphology and diet of three species of the genus\u00a0Crenicichla<\/i>. We analysed the stomach contents and the morphology (through the geometric morphometric and teeth types) of their lower pharyngeal jaws (LPJ). We tested the hypothesis that LPJ morphology predicts the diet of\u00a0Crenicichla<\/i>\u00a0species in streams. Our results indicated that the diet and the patterns of pharyngeal jaws were different among the species of\u00a0Crenicichla<\/i>, mainly the posterior process of the LPJ, the region of muscle insertion of LPJs with the neurocranium and the curvature of LPJ. Variation among the lower pharyngeal jaw shapes was shown to be directly associated with the use of food resources.\u00a0Crenicichla<\/i>\u00a0species had a carnivorous diet based on fish and invertebrates (Aegla<\/i>\u00a0and aquatic insects). Higher fish consumption was observed in species with elongated lateral process in the LPJ and larger numbers of teeth, mainly recurved and conical unicuspid and bicuspid teeth (C. scottii<\/i>\u00a0and\u00a0C. lepidota<\/i>). On the other hand, higher consumption of\u00a0Aegla<\/i>\u00a0was associated with a robust LPJ and molariform teeth (C. punctata<\/i>). The total number of teeth was positively correlated with higher fish consumption. In addition, our results point to the need for investigations about spatial-temporal variations in\u00a0Crenicichla<\/i>\u00a0diets to understand this group\u2019s success in several freshwater environments<\/p>\n

Link:\u00a0https:\/\/link.springer.com\/article\/10.1007%2Fs10641-020-00963-y<\/a><\/p>\n

\"\"<\/a>

a Live representatives of C. lepidota (1), C. punctata (2), and C. scottii (3); b ventral view of lower pharyngeal jaw; c summaries of their stomach contents. Aquatic insects; Terrestrial insects; Other aquatic invertebrates; Aegla; Fish; Plant remains; \u25a0 Detritus<\/p><\/div>\n

\"\"<\/a>

Ventral and lateral view of lower pharyngeal jaw and dentition of 1C. lepidota; 2C. punctata; 3C. scottii from streams, Upper Jacu\u00ed and Ibicu\u00ed sub-basins, Southern Brazil. Teeth types: a) Bicuspid; b) Recurved unicuspid; c) Conical unicuspid; d) Molariform<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Fernanda Kuhn,\u00a0Mayara Pereira Neves,\u00a0Karine Orlandi Bonato\u00a0&\u00a0Clarice Bernhardt Fialho Abstract Cichlidae have a magnificent ecological versatility that provides the species to explore many trophic niches, and behavioural biology. This versatility was achieved by modifications in the cranial and pharyngeal apparatus of cichlids. Accordingly, we aim to examine the relationships between pharyngeal morphology and diet of three […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-958","post","type-post","status-publish","format-standard","hentry","category-sem-categoria"],"_links":{"self":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/958","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/comments?post=958"}],"version-history":[{"count":2,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/958\/revisions"}],"predecessor-version":[{"id":962,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/958\/revisions\/962"}],"wp:attachment":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/media?parent=958"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/categories?post=958"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/tags?post=958"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}