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|Title: ||Food resources and cyprinid diet in permanent and temporary Mediterranean rivers with natural and regulated flow.|
|Authors: ||Alexandre, C.M.|
Almeida, Pedro R.
|Keywords: ||fish diet|
|Issue Date: ||2015|
|Publisher: ||John Wiley & Sons|
|Citation: ||Alexandre, C.M., S. Sales, M.T. Ferreira & P.R. Almeida (2015). Food resources and cyprinid diet in permanent and temporary Mediterranean rivers with natural and regulated flow. Ecology of Freshwater Fish, 24: 629-645.|
|Abstract: ||Th is study addresses the differences in food availability, diet and feeding activity of the Iberian barbel,
between permanent and temporary nonregulated rivers, and the effect of flow regulation on feeding parameters.
A total of 267 adult barbels were seasonally collected in four nonregulated and regulated rivers from permanent and
temporary basins, and their gut content was analysed. Locally available food sources were evaluated across sites
and seasons. Ba rbels from the permanent nonregulated river exhibit a more variable and diversified diet in which
invertebrates assumed a large importance, especially during high flow s. Barbels from the temporary nonregulated
river presented a more uniform diet composed of plant material and detritus, particular ly in drought seasons. Flow
regulation affected different flow components in both systems, but the effects on food resourc es and barbels’ diet
were similar, resulting in an intra-annual stabilisation of resource availability and fish diet, with a higher
consumption of plants and detritus. Changes in fish diet and feeding activity in both nonregulated and regulated
rivers were strongly associated with the seasonal variability of streamflow components, particularly between low-
and high-flow periods, and with the reduction in flow variability in the case of dam regulation. Results from this
study can be used to improve guidelines for flow requirement implementation.|
|Appears in Collections:||BIO - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
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