Effects of water clarity and other environmental factors on trophic niches of two sympatric piscivores
. Freshwater Biol.
Alternatively, they may be rarer in reservoir tributaries because of reduced colonization from stream fragmentation or increased interactions with reservoir piscivores
or generalist competitors that are moving into tributaries from the reservoir (Hebert and Gelwick, 2003; Matthews and Marsh-Matthews, 2007).
Study system: We examined skulls and jaws from 228 adult bat specimens of two piscivores
(Myotis vivesi: 20 females, 27 males; Noctilio leporinus: 27 females, 24 males), two insectivores (M.
tol are carnivore piscivores
, feeding opportunistically on crustaceans and mollusks.
Previous research suggested that migrating smolts are subjected to heavy predation from piscivores
(Mather 1998, McCormick et al.
, fish that feed on other fish, have mouths large enough to swallow their prey whole or sport teeth to remove chunks of flesh.
Marine avian species tend to be faunivores (eg, carnivores, piscivores
, zooplanktonivores, molluscivores, and so forth); literature on nutritional or veterinary research involving any faunivorous avian species is sparse, and these studies primarily examine healthy raptors.
, trophic cascades, and lake management," The Scientific World Journal, vol.
Functional groups that composed more than 10% of the catch per gear type were included: for example, over this time span, 23% of the targeted browsers (e.g., unicornfishes [Naso spp.]), 12% of the target grazers (most surgeonfishes [Acanthurus spp.]), and 37% of the roving piscivores
(e.g., jacks) were caught by gill-net fishing; therefore, we added the estimates of biomass from the visual surveys for those 3 groups for the calculation of q for gill-net fishing.
Because nonnative piscivores
are known to have severe negative impacts on native fishes in the southwestern United States (e.g., Meffe, 1985; Marsh and Douglas, 1997), an examination of the extent of piscivory by F.
It is also used in Brazilian hatchering programs as live food for other native species, mainly piscivores
, because of its easy management in pisciculture (Viveiros et al., 2009).
They are carnivorous species, mainly piscivores
with stenophagy and trophic specialization (Carr & Adams, 1973; Arceo-Carranza et al, 2004; Cocheret de la Moriniere et al., 2004; Cruz-Escalona et al., 2005; Guevara et al., 2007).