Do cage fish farms interfere with the food aspects of the wild species Metynnis lippincottianus (Characiformes, Serrasalmidae)?

Autor(es)

Ramos, Julia Kaori Kuriyama ; do Bonfim, Vinicius Cesar ; Kliemann, Bruna Caroline Kotz ; Garves, Jose Daniel Soler ; Delariva, Rosilene Luciana ; Ramos, Igor Paiva

• Tipo de documento: Artigo Científico
• Fonte: BOLETIM DO INSTITUTO DE PESCA; v. 48, p. 9-pg., 2022-01-01.

Resumo

We evaluated the differences in the diet and trophic guild of Metynnis lippincottianus under the in-fluence of cage fish farms in the Neotropical reservoir. We collected samples from two areas (cage farm and control) in March and June 2019. Stomach contents were examined, and food items were identified and quantified using the volumetric method. Differences in diet composition were evaluated using PERMANOVA and SIMPER analyses, while trophic niche breadth was determined using PERMDISP. The trophic guild for each area was also determined. Significant differences in diet between cage farm and control areas were observed, due to consumption of pelleted feed, mi-crocrustaceans, Egeria sp., and filamentous algae. In both sampling areas, M. lippincottianus was classified as algivorous. Despite the pelleted feed consumption in the cage farm area, no differen-ces were observed in trophic niche breadth and the trophic guild. In addition, algae and macro-phytes still accounted for the majority of this species' diet in both areas, indicating partitioning of resources. This resource partitioning may favor coexistence, but it is worth mentioning that pelleted feed consumption still indicates the influence of cage fish farms on the diet of wild fish. (AU)

• Processo FAPESP: 18/01117-2 - Ecologia trófica e biomarcadores isotópicos e fisiológicos de duas espécies de peixes pertencentes a diferentes guildas tróficas (omnívora e carnívora) associados a pisciculturas em tanques-rede
• Beneficiário: Bruna Caroline Kotz Kliemann
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 20/10507-9 - Pisciculturas em tanques-rede interferem sobre a ecologia trófica de Metynnis lippincottianus (Characiformes, Serrasalmidae) ?
• Beneficiário: Julia Kaori Kuriyama Ramos
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 18/26348-7 - Ecologia trófica e biomarcadores isotópicos e histofisiologicos de peixes pertencentes a diferentes guildas tróficas associados a pisciculturas em tanques-rede
• Beneficiário: Igor Paiva Ramos
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular