Phenotypic variation of the fishes Curimata mivartii (Characiformes: Curimatidae) and Pimelodus grosskopfii (Siluriformes: Pimelodidae) in lotic and lentic habitats

 

Đã lưu trong:
Chi tiết về thư mục
Nhiều tác giả: Hincapié-Cruz, Juan P., Márquez, Edna J.
Định dạng: artículo original
Trạng thái:Versión publicada
Ngày xuất bản:2021
Miêu tả:Introduction: Despite their importance in swimming performance and individual fitness, body shape and size variations in response to water flow velocity remain unknown for most migratory freshwater fishes in the Neotropics. Objective: Test the hypothesis of phenotypic variation in the size and body shape of two species of freshwater fishes that encounter changes in water velocity across their migrations in two rivers that belong to a single Neotropical basin. Methods: Landmark-based geometric morphometrics was used to study variations in body size and shape for the fish species Curimata mivartii and Pimelodus grosskopfii in lotic and lentic habitats of the Colombian Magdalena-Cauca Basin. Results: Individuals of C. mivartii from two lotic habitats were similar in size and both were significantly bigger than those from lentic habitats, whereas individuals of P. grosskopfii were similar in size in both habitats. Both species showed more streamlined bodies in lotic habitats and deeper body shapes in lentic habitats. Conclusions: Both species exhibit phenotypic changes in body shape concordant with previous predictions on morphological variations of fishes. This information is relevant to predict changes in response to environmental heterogeneity, especially those induced by anthropogenic activities that change the water velocity in the river.
Quốc gia:Portal de Revistas UCR
Tổ chức giáo dục:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
Ngôn ngữ:Español
OAI Identifier:oai:portal.ucr.ac.cr:article/41708
Truy cập trực tuyến:https://revistas.ucr.ac.cr/index.php/rbt/article/view/41708
Access Level:acceso abierto
Từ khóa:geometric morphometric
phenotypic variation
phenotypic plasticity
flow regimes
morfometría geométrica
variación fenotípica
plasticidad fenotípica
regímenes de flujo