Food Plants Eaten by Amazonian Manatees (Trichechus inunguis, Mammalia : Sirenia)

Colares, Ioni Gonçalves; Colares, Elton Pinto

doi:10.1590/s1516-89132002000100011

Cited by 87 publications

(56 citation statements)

References 11 publications

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“…Based on the interviews and plant collection, we identified 38 species that are potentially part of the Amazonian manatee diet in Urucú area. Thirty-six of them (95%) have been yet reported in the scientific literature (Best 1981;Best & Teixeira 1982;Colares 1990;Colares & Colares 1992, 2002Guterres et al 2008), showing the confidence of the information obtained by the interviews. The species most mentioned by the fishermen corresponded to grasses.…”

Section: Morphology and Behaviormentioning

confidence: 88%

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What do Local People Know About Amazonian Manatees? Traditional Ecological Knowledge of Trichechus inunguis in the Oil Province of Urucu, AM, Brazil

Castelblanco‐Martínez¹,

Franzini²,

Rosas³

et al. 2013

NatCon

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During 2005-2007, a series of interviews were carried out with the riverside populations of the Oil Province of Urucu (AM, Brasil). The main goal of this work was to characterize the knowledge of the inhabitants of this area regarding the Amazonian manatee (Trichechus inunguis) (listed as Vulnerable on the IUCN Red List). Interviews were conducted with 74 local inhabitants from 33 communities. Between 2004 and 2007, 20 poached or entangled Amazonian manatees were reported in the area. Poaching with harpoon is the principal cause of mortality, but manatees are also incidentally caught in fishing nets. Interviewers described details of manatee hunting techniques in the area. The trade of manatee meat, although currently forbidden by Brazilian laws, still occurs in the area. Data obtained from the interviews suggest a dietary preference of the manatee for at least 29 species of aquatic and semi-aquatic plants. The interviewed fishermen showed a sound knowledge of Amazonian manatee biology and behavior. This information may be important to assist future conservation plans in the Amazon.

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Section: Morphology and Behaviormentioning

confidence: 88%

“…Amazonian manatees feed on a wide variety of aquatic and semi-aquatic plant species (Best 1981;Colares & Colares 2002). …”

Section: Morphology and Behaviormentioning

confidence: 99%

What do Local People Know About Amazonian Manatees? Traditional Ecological Knowledge of Trichechus inunguis in the Oil Province of Urucu, AM, Brazil

Castelblanco‐Martínez¹,

Franzini²,

Rosas³

et al. 2013

NatCon

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“…Since then, it has been used by many authors with different species of herbivores, including aquatic herbivores, like the Amazon manatee (Colares and Colares 2002), and semi-aquatic ones, like the capybara (Borges and Colares 2007). Studies of coypus' alimentary habits have been done in Argentina (Borgnia et al 2000, D'adamo 672 IONI G. COLARES, RAQUEL N. V. OLIVEIRA, RAFAEL M. OLIVEIRA and ELTON P. COLARES et al , Guichón et al 2003, France (Abbas 1988, 1991, and Italy (Prigioni et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Feeding habits of coypu (Myocastor coypus Molina 1978) in the wetlands of the Southern region of Brazil

Colares

Oliveira

Liveira

et al. 2010

An. Acad. Bras. Ciênc.

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The aim of this study was to determine the diet of coypu (Myocastor coypus) in two areas (Santa Isabel do Sul wetlands -Area 1, and Santa Marta Farm -Area 2) in the Southern region of Brazil, using microhistological analyses of feces. Twenty-four plant species were identified from collected feces samples. Among the identified species, nine are common in the animals' diet in both areas; the presence of Oriza sativa was not detected in any of the samples. Among the identified species, 84% and 54% of the coypu's diet from Areas 1 and 2, respectively, are aquatic plants. Poaceae family was most common, being found in 82% of the samples from both areas. Paspalum disthichum (Area 1) and Panicum tricholaenoides (Area 2) were the most frequent species on the coypu's diet. The diet comparison for both areas indicates that feeding habits vary depending on the type of habitat, environmental conditions and food availability. The absence of rice in our analysis may be an indication for the preservation of native areas around watercourses, so as to prevent coypu from invading irrigated crops.

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“…The contamination of leaves of aquatic macrophytes with crude oil would cause the contamination of fish with crude oil. Other animals, such as the manatee (Trichechus inunguis), use E. polystachya (13.8%) and E. crassipes (11.2%) among their most important feeding items (Colares & Colares, 2002) and therefore, the death of these plants could cause a drastic reduction in the feeding options for this mammal. Due to their dense mass of roots, E. crassipes provide habitat for fish, fingerlings, insects, and other aquatic organisms (Junk & Howard-Williams, 1984).…”

Section: Discussionmentioning

confidence: 99%

Effects of crude oil on survival, morphology, and anatomy of two aquatic macrophytes from the Amazon floodplains

2009

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Aquatic herbaceous macrophytes grow in profusion in the Amazon fertile varzea floodplains. A large number of species occur but only a few are particularly abundant, supporting food chains, contributing substantially to carbon and nutrient cycles. Their growth and role in the ecosystem depend, among other, on its life cycles and habits, floating or semi-aquatic. Although in the last decades, petroliferous activity intensified in the Central Amazon region and so did oil spills, the effect of petroleum on the native aquatic plants is unknown. The present study was designed to test experimentally the survival and morpho-anatomical modifications of the free floating water hyacinth Eichhornia crassipes and the semi-aquatic grass Echinochloa polystachya to 10 different concentrations of crude oil. Higher concentrations of crude oil caused the mortality in both species; however, lethal dose (LD 50 ) values showed that E. polystachya was more sensitive than E. crassipes. Despite the higher tolerance of E. crassipes, the inhibition of root and leaf growth as well as anatomical modifications in leaves were registered in higher concentrations. Additionally, the oil caused a reduction in leaf numbers in both species. Although mortality of the floating species was lower, it may increases over time, since important alterations in morphology and anatomy occurred. These results show that oil spills in the Amazon varzea can cause severe alterations in the aquatic flora and in the floodplain dynamics.

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Food Plants Eaten by Amazonian Manatees (Trichechus inunguis, Mammalia : Sirenia)

Abstract: To determine the feeding habits of the Amazonian manatee Trichechus inunguis in some Central

Cited by 87 publications

References 11 publications

What do Local People Know About Amazonian Manatees? Traditional Ecological Knowledge of Trichechus inunguis in the Oil Province of Urucu, AM, Brazil

What do Local People Know About Amazonian Manatees? Traditional Ecological Knowledge of Trichechus inunguis in the Oil Province of Urucu, AM, Brazil

Feeding habits of coypu (Myocastor coypus Molina 1978) in the wetlands of the Southern region of Brazil

Effects of crude oil on survival, morphology, and anatomy of two aquatic macrophytes from the Amazon floodplains

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