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Natural history study of an understudied sea catfish species from Panama (Siluriformes: Ariidae)
Fox, Janay; Jiménez A, Máximo; Stange, Madlen.
Affiliation
  • Fox, Janay; McGill University. Redpath Museum. Montréal. Canadá
  • Jiménez A, Máximo; Smithsonian Tropical Research Institute. Panama. Republic of Panama
  • Stange, Madlen; McGill University. Redpath Museum. Montréal. Canadá
Neotrop. ichthyol ; 19(4): e200105, 2021. graf, mapas, ilus
Article in En | VETINDEX | ID: vti-765888
Responsible library: BR68.1
Localization: BR68.1
ABSTRACT
The semi-anadromous sea catfish species Cathorops tuyra (Ariidae, Besudo sea catfish) from the Tropical Eastern Pacific has been found reproductively active in the freshwater rivers and lakes of the Panama Canal. Despite growing concerns for biodiversity, reports on natural history are lacking for many Neotropical sea catfishes. We aimed to provide data on the diet and seasonal timing of spawning of C. tuyra for an autochthonous, semi-anadromous, brackish water population from Rio Santa Maria and an allochthonous freshwater non-migrating population from Rio Chagres, an affluent to the Panama Canal, to understand how changing from semi-anadromous to residential lifestyle affects the natural history of a species. Fish from both sampling sites were dissected and information on stomach content, size, weight, parasitic load, sex, maturity, and number of eggs were recorded. In Rio Chagres, there was a female bias and individuals were larger and in pre-spawning mode compared to Rio Santa Maria. Parasite prevalence was low in Rio Chagres and zero in Rio Santa Maria. The diets were very similar between populations gastropods, bivalves, and insects were the most important prey items in both rivers representing a diverse omnivorous diet that is similar to that of other catfishes.(AU)
RESUMEN
El bagre de mar semi-anádromo Cathorops tuyra (Ariidae, Bagre besudo) del Pacífico Oriental Tropical se encuentra reproductivamente activa en los ríos y lagos del Canal de Panamá. A pesar de la creciente preocupación por la biodiversidad, faltan informes sobre la historia natural de muchos de los bagres Neotropicales. Nuestro objetivo es proporcionar datos básicos sobre la dieta y el momento del desove estacional de C. tuyra para una población autóctona semi-anádroma de agua salobre de Río Santa María y una población alóctona residente de agua dulce de Río Chagres para comprender cómo el cambio de un estilo de vida semi-anádromo a residencial afecta la historia natural de una especie. Se disecaron peces de ambos sitios de muestreo y se registró la información de contenido del estómago, tamaño, peso, carga parasitaria, sexo, madurez y número de huevos. En Río Chagres hubo un sesgo femenino y los individuos eran más grandes y estaban en modo pre-desove que en Río Santa María. La prevalencia de parásitos fue baja en el Río Chagres y cero en Río Santa María. Las dietas fueron muy similares entre poblaciones gasterópodos, bivalvos e insectos fueron las presas más importantes en ambos ríos, lo que representa una dieta omnívora diversa, que es similar a la de otros bagres.(AU)
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Full text: 1 Database: VETINDEX Main subject: Catfishes / Natural History / Biodiversity Limits: Animals Country/Region as subject: America central / Panama Language: En Journal: Neotrop. ichthyol Year: 2021 Document type: Article

Full text: 1 Database: VETINDEX Main subject: Catfishes / Natural History / Biodiversity Limits: Animals Country/Region as subject: America central / Panama Language: En Journal: Neotrop. ichthyol Year: 2021 Document type: Article