COATI DIET IN URBAN WOODLAND
REVISTA CHILENA DE HISTORIA NATURAL
Revista Chilena de Historia Natural 86: 95-102, 2013
95
© Sociedad de Biología de Chile
RESEARCH ARTICLE
Diet of the coati Nasua nasua (Carnivora: Procyonidae) in an area of
woodland inserted in an urban environment in Brazil
Dieta del Coatí Nasua nasua (Carnivora: Procyonidae) en un fragmento de bosque dentro
en un ambiente urbano en Brasil
GIOVANNE A. FERREIRA1,2*, EDUARDO NAKANO-OLIVEIRA2,3, GELSON GENARO2,4,
& ADMA K. LACERDA-CHAVES5
1 Programa
de Pós Graduação em Biologia e Comportamento Animal, Universidade Federal de Juiz de Fora, Campus
Universitário/sn, Juiz de Fora, MG, 36036-900, Brasil
2 Instituto de Pesquisas Cananéia. Rua João Salim, Lote 26, Quadra Y, Parque Xangrilá, Campinas, SP, 13098-106, Brasil
3 Conselho Nacional de Defesa Ambiental, CNDA, Rua Dr. Renato Paes de Barros, 512 conj. 131,
São Paulo, SP, 04530-000, Brasil
4 Programa de Pós-Graduação em Psicobiologia da Faculdade de Filosofia Ciências e Letras de Ribeirão Preto da Universidade
de São Paulo, Ribeirão Preto, SP, 14001-970, Brasil
5 Instituto de Ciências Ambientais e Desenvolvimento Sustentável, Universidade Federal da Bahia, Av. Prof. José Seabra,
S./N. Centro, Barreiras, BA, 47800-000, Brasil
*Corresponding author: ferreira.g.a@hotmail.com
ABSTRACT
Coatis are omnivores whose diet consists of small vertebrates, invertebrates, and fruit. In urban areas, they may ingest
food waste that has been discarded in deposits near their habitat, or they may consume food offered by humans. The
present work investigates the diet of coatis through analysis of 56 fecal samples collected from Morro Imperador, a
fragment of woodland inserted into an urban center in the municipality of Juiz de Fora, State of Minas Gerais, Brazil.
The results point to a diet with niche breadth of 0.4 in which the percentage of occurrence of insects (34.9 %) and fruit
(19.9 %) comprise the main dietary items. The presence of food due to human action (direct or indirect) is also constant
throughout the year (14.1 %), thereby demonstrating the ability of these animals to adapt to modified environments.
Key words: anthropic influence, Atlantic Forest, diet alteration, trophic ecology.
RESUMEN
Los coatíes son omnívoros cuya dieta se compone de pequeños vertebrados, invertebrados y frutas. En zonas
urbanas, pueden ingerir residuos de alimentos provenientes de desechos domésticos próximos a su hábitat,
como también alimentos ofrecidos por seres humanos. El presente trabajo investiga la dieta de coatíes a través
del análisis de 56 muestras de heces colectadas en el Morro Imperador, un fragmento de bosque incluido en una
área urbana del municipio de Juiz de Fora, Estado de Minas Gerais, Brasil. Los resultados indican una dieta
con amplitud de nicho de 0,4 siendo que, en que la porcentaje de ocurrencia de insectos (34.9 %) y frutas (19.9 %)
constituyen los principales componentes alimentarios. La presencia de alimentos debido a la acción humana (directa
o indirecta) también es constante durante todo el año (14.1 %), lo que demuestra la capacidad de adaptación de
estos animales en ambientes modificados.
Palabras clave: alteraciones alimentarias, ecología trófica, influencia antropogénica, Mata Atlántica.
INTRODUCTION
The continuous fragmentation of the Brazilian
woodland known as Mata Atlântica (Atlantic
Forest), together with the ever-increasing
anthropic occupation of this biome, has
culminated in diminished areas for animals
to explore. As a result, animals living in these
regions have had to turn to new approaches to
find food. However, when wild animals leave the
woodland to search for domestic food, they may
undergo behavioral changes and be exposed to
anthropic aggression.
The Procyonidae species are distributed
throughout America. Among the species of
FERREIRA ET AL.
96
the genus Nasua, the white-nosed coati, Nasua
narica (Linnaeus, 1766), mainly inhabits
Central America, while the common coati,
N. nasua (Linnaeus, 1766), inhabits South
America. The common coati has been less
intensively sutided than the white-nosed coati
(Gompper & Decker 1998).
Coatis are diurnal animals with arboreal
habits (Redford & Stearman 1993, Gomper &
Decker 1998, Cheida et al. 2011). They forage
using their long mobile snouts, which are
adapted to the investigation of cracks and holes.
Coatis feed on small vertebrates, invertebrates,
and fr uit (Bisbal 1986, Mc Clear n 1992,
Beisiegel 2001), but they can also ingest food
waste discarded in deposits in urban regions
that are close to the areas that they occupy
(Alves-Costa et al. 2004).
The present investigation aimed to evaluate
the diet of coatis living in a fragment of
the Mata Atlântica in the urban area of the
municipality of Juiz de Fora, state of Minas
Gerais, Brazil. Fecal samples were gathered
from a coati population inhabiting this area and
were analyzed. The possible anthropic influence
on the diet of these animals was also assessed.
This investigation tests the hypothesis that the
coati is a generalist and opportunistic species
regarding its choice of plants, animals, and the
use of food from anthropogenic origin.
METHODS
Study Area
The municipality of Juiz de Fora has a total area of 1,424
km² and is located in the southeast of the state of Minas
Gerais, Brazil, between 21º34’ - 22º05’S and 43º09’ 43º45’W. Its minimum and maximum altitudes are 467
m and 1104 m, respectively. According to the Köppen
climate classification, the municipality has Cwa and Cwb
climates (highland tropical climate with hot summers).
The average annual temperature is approximately 22.5
ºC, and the average annual precipitation is 1470 mm
(LabCAA 2006).
The woodland fragment known as Mata do Morro
do Imperador is situated between coordinates 21°45’13”
- 21°46’13”S and 43°21’19” - 43°22’15”W. It is an area
consisting of a mosaic of fragments totaling 78 ha of
secondary forest; Mata do Morro do Imperador reaches
an altitude of 923 m, one of the highest points in the
city. According to Sato (1995), this area is classified as
Seasonal Semi-deciduous Mountain Forest, a subdivision
of the biome Mata Atlântica. It is one of the remaining
fragments of this type of woodland in Juiz de Fora,
localized in a central area of the city that is comprised
of private land as well as public areas belonging to the
municipal government.
Collection and analysis of data
Visits to the area of Mata do Morro do Imperador for
collection of samples of coati feces were organized every
14 days over a period of 24 months. Mapped areas along
tracks, forest borders, and places where these animals
had been seen foraging were covered in an attempt
to locate and extract the largest possible number of
samples.
Initially, the fecal samples were individually stored in
labeled plastic bags. Later, they were placed in jars with
lids containing AFA solution (ethanol, 70º GL, 90 mL;
formaldehyde, 5 mL; acetic acid 2 mL) for preservation
and further analysis. In the laboratory, the samples were
washed in thin-mesh sieves (0.5 mm) and dried under
sunlight for 48 to 72 hours. Items were separated and
grouped into ten categories for analysis: (1) mammals,
(2) birds, (3) reptiles, (4) amphibians, (5) other items
of vertebrate origin (such as egg shells), (6) arachnids,
(7) insects, (8) plants, (9) domestic food, and (10) waste
(nondigestible material of anthropic origin, including but
not limited to plastic, paper, and Styrofoam).
Slides for identification of hair cuticles and medulla
microstructures were mounted using material from
the samples in order to identify items classified under
“mammals” (Quadros 2002, Quadros & Monteiro-Filho
2006). This technique aided identification of dietary
species and confirmed that the defecating species was
really the target species. This analysis was carried out
via comparison with samples reported in the specialized
literature (Quadros 2002, Martin et al. 2009). For the
items in categories 2-10 above, comparison with samples
previously collected in the study area and collaboration
with other specialists enabled us to characterize the
samples to the lowest taxonomic level possible.
To determine the importance of each food item for
the diet of coatis, the percentage of occurrence (PO) of
each item was calculated by dividing its total frequency
by the sum of the frequencies of all other items (Maehr
& Brandy 1986). To quantify how common a specific
item was, we computed the frequency of occurrence
(FO), which corresponds to the percentage of each feces
containing this item (Konecny 1989).
The degree of diet specialization was estimated
on the basis of the niche breadth as judged from the
standardized Levins index (BA; range 0 to 1; values near
or equal to 1.0 indicate a higher niche amplitude). For
this estimation, dietary categories 1-9 were considered;
materials classified as “waste” (category 10) were
considered to have been ingested accidentally while the
animals were foraging, and thus they were not included
in the diet specialization analysis.
RESULTS
A total of 56 fecal samples were collected, 22
during the dry season (39.3 %; n = 10 during
the first 12 months of collection (Year I) and n
= 12 during the second 12-month period (Year
II)) and 34 during the rainy season (60.7 %; n =
13 during Year I and n = 21 during Year II). The
average number of food items per feces was 4.5
(minimum of 1 and maximum of 10). Fifty taxa
were identified in the diet of N. nasua (Table 1).
COATI DIET IN URBAN WOODLAND
97
TABLE 1
Food items detected in the feces from N. nasua living in a fragment of the Mata Atlântica. FO =
frequency of occurrence; PO = percentage of occurrence; n.i. = not identified
Componentes alimentarios detectados en las heces de N. nasua en un fragmento de la Mata Atlántica. FO = frecuencia
de ocurrencia; PO = porcentaje de ocurrencia; n.i. = no identificado.
Total
(N = 56)
Food items
FO
PO
Mammals
41.1
9.5
Didelphimorfia: Didelphidae: Gracilinanus sp.
1.8
0.4
Rodentia: Cricetidae: Calomys tener (Winge, 1887)
10.7
2.5
Rodentia: Cricetidae: Akodon sp.
5.4
1.2
Rodentia: Cricetidae: Oligoryzomys sp.
7.1
1.7
Rodentia: Cricetidae: Oxymycterus sp.
1.8
0.4
Rodentia: Muridae: n.i.
14.3
3.3
Aves
21.4
5.0
Passeriforme: n.i.
19.6
4.6
Birds: n.i.
1.8
0.4
Reptiles
8.9
2.1
Squamata: Colubridae
3.6
0.8
Squamata: Anguidae
5.4
1.2
Amphibians
14.3
3.3
Anura: Hylidae: n.i.
14.3
3.3
Other
10.7
2.5
Eggs
10.7
2.5
Arachnids
7.1
1.7
Aranea: Araneomorpha
5.4
1.2
Aranea: Opiliones
1.8
0.4
Insects
100.0
34.9
Blattaria: Blatidae
26.8
6.2
Coleoptera: Scarabaeidae
5.4
1.2
Coleoptera: Carabidae
7.1
1.7
Coleoptera: Passalidae
3.6
0.8
Coleoptera: n.i.
1.8
0.4
Orthoptera: Acrididae
5.4
1.2
Orthoptera: Tettigoniidae
7.1
1.7
Vertebrates
Invertebrates
FERREIRA ET AL.
98
TABLE 1. Continuation
Total
(N = 56)
Food items
FO
PO
Orthoptera: Grillacrididae
3.6
0.8
Orthoptera: Gryllidae
5.4
1.2
Orthoptera: n.i.
5.4
1.2
Hymenoptera: Vespidae
3.6
0.8
Hymenoptera: Formicidae
8.9
2.1
Hymenoptera: Apidae
3.6
0.8
Hemiptera: Heteroptera
1.8
0.4
Lepidoptera: n.i.
3.6
0.8
Odonata: Aeshnidae
1.8
0.4
Isoptera: Termitidae
3.6
0.8
Mantodea: n.i.
1.8
0.4
Insets: n.i.
50
11.6
Plants
85.7
19.9
Aracales: Arecaceae: Syagrus romanzoffiana
10.7
2.5
Ericales: Lecythidaceae: Lecythis pisonis
7.1
1.7
Rosales: Moraceae: Ficus sp.
8.9
2.1
Rosales: Urticaceae: Cecropia sp.
7.1
1.7
Rosales: Rosaceae: Rubus sp.
3.6
0.8
Myrtales: Myrtaceae: Psidium guayava
5.4
1.2
Myrtales: Myrtaceae: Eugenia cerasiflora
3.6
0.8
Vegetal material: n.i.
39.3
9.1
Domestic food
60.7
14.1
Animal food
1.8
0.4
Fruit
19.6
4.6
Cooked bones
12.5
2.9
Other types of domestic food
26.8
6.2
Waste
30.4
7.1
Plastic
16.1
3.7
Styrofoam
3.6
0.8
Paper
5.4
1.2
Aluminum foil
1.8
0.4
Other
3.6
0.8
Total occurrence of items
100 %
COATI DIET IN URBAN WOODLAND
Insects (PO = 34.9 %) and food of plant
origin (PO = 19.9 %) were the main items
in most of the examined samples. Insects
were obser ved in feces collected in all
surveyed months (Fig. 1; Table 1). The coatis
ingested fr uit belonging to seven species:
queen palm (Syagrus romanzoffiana [(Cham.)
Glassman,1968]), cream nut (Lecythis pisonis
[Cambe ssèdes,1829]), fig trees (Ficus sp.),
cecropias (Cecropia sp.), guava (Psidium
99
guayava [Linnaeus, 1753]), blackberry (Rubus
sp.), and fruit from Eugenia cerasiflora (Miquel
1849). When considered together with other
unidentified plant fragments, these items were
present in 85.7 % of the fecal samples (Table
1). Domestic food (including animal food, fruit,
and cooked bone) was detected in 60.7 % of
the analyzed feces, corresponding to 14.1 % of
the total number of items identified in the diet.
Vertebrates were detected in 98.2 % of the feces;
Fig. 1: Relationship between the items detected in the diet of coatis (N. nasua; top panel) and the average
monthly rainfall recorded between January of Year I and December of Year II (lower panel) in a fragment of the
Mata Atlântica.
Relación entre los componentes detectados en la dieta de coatíes (N. nasua; panel superior) y el promedio de lluvias mensuales
registradas entre enero del año I y diciembre del año II (panel inferior) en un fragmento de la Mata Atlántica.
FERREIRA ET AL.
100
mammals were the most consumed vertebrates
(PO = 9.5 %), followed by birds (PO = 5.0 %),
amphibians (PO = 3.3 %), and reptiles (PO = 2.0
%; Table 1). Nondigestible material of anthropic
origin (“waste”) corresponded to 7.1 % of the
items and was found in 30.4 % of the feces.
The trophic niche breadth analysis indicated
a diet with values inter mediate between
those from a generalist diet and those from a
specialist diet (BA = 0.4).
DISCUSSION
There is a paucity of studies repor ting the
anthropic impact on the diet of coatis in natural
areas (Alves-Costa et al. 2004, Hirsch 2009),
especially in regions under large anthropic
influence. One such region is Mor ro do
Imperador, located in the urban center of the
municipality of Juiz de Fora, Minas Gerais,
Brazil.
Coatis inhabiting woodlands feed mainly
on fruit, invertebrates, and small vertebrates
(Emmons 1990, Mc Clearn 1992, Beisiegel
2001). Consistent with the obser vations of
Bisbal (1986) and Alves-Costa et al. (2004),
in our analysis inver tebrates represented
the major food source for coatis occupying
the woodland in Morro do Imperador (Table
2). These inver tebrates mainly consisted
of blattaria, or thoptera, and coleoptera,
which together accounted for 36.5 % of the
total number of items. Despite their small
importance in terms of energy intake (relative
to volume), these inver tebrates were more
frequently consumed over virtually the entire
study period. Fr uit was the second most
ingested item and therefore represents an
important part of the diet of coatis. Redford
and Stearman (1993) and Santos and Beisiegel
(2006) reported that fruit is the item that is
most consumed by coatis (Table 2). In contrast
to the findings of Alves-Costa et al. (2004), birds
did not make up a very substantial portion of
the coati diet, although birds were found in
some of the analyzed samples. Rodents were
the most frequently ingested mammals (9.6
% of the total of consumed items and 42.6 %
of the vertebrate items). The smaller intake
of mammals during the rainy season may be
related to the larger availability of fruit during
this period, as reported by Alves-Costa et al.
(2004) and Hirsch (2009).
Coatis were consistently spotted foraging
on the margins of a highway crossing the
woodland region of Mor ro do Imperador,
where there is a kiosk that sells coconut water.
Coatis were often seen removing the solid
endosperm from inside the coconuts that had
been deposited in cotton bags and placed near
the kiosk for selective garbage collection.
Moreover, customers of the kiosk, residents
of the area surrounding the woodland, and
students and staff of a school near the study
area frequently of fered industrialized food,
such as bread and biscuits, to these animals.
However, no evidence of these items was
found in the analyzed fecal samples due to
their complete digestion. Ingestion of blattaria,
added to the “waste” detected in the samples,
reinforces the notion of adaptive behavior
by foraging coatis in natural areas under
anthropic influence. These animals explore
resources deposited in garbage bins (AlvesCosta et al. 2004), Hirsch 2009). Constant
offers of industrialized food and consumption
of food items that are easy to digest, such
as solid coconut endosperm, as well as the
absence of these items in the analyzed fecal
samples suggest cautious interpretation of the
coati diet based exclusively on feces analysis.
This suggestion is corroborated by repor ts
that these animals also feed on cultivated
fruit (such as mango and guava) and on food
that is directly provided to coatis living in
situations of semi-captivity, for which there is
no confirmation in fecal samples (Santos &
Beisiegel, 2006). Although a wide variety of
items were detected in the samples, the niche
breadth values for this region partly diverge
from what has been suggested in terms of a
generalist diet (Redford & Stearman 1993).
We calculated intermediate values closer to
zero, which characterizes the target species as
having a generalist diet.
Our obser vations demonstrate that coatis
can use alternative food resources that are
abundant and close to the area they explore,
which may be interfering in their search for
food within the woodland itself. It remains
unverified whether the woodland in Morro do
Imperador furnishes enough food throughout
the entire year to sustain the coati population;
a lack of natural resources would justify their
inspection of other food sources. Opportunistic
exploration of food waste deposits and
COATI DIET IN URBAN WOODLAND
101
TABLE 2
Frequency of occurrence of food items as reported in previous studies of N. nasua involving
different methodologies. n.r. = values not reported, although indicated in the study. - items not
mentioned in the study. a stomach contents; b direct observations; c fecal analysis
Frecuencia de ocurrencia de los componentes alimentarios de N. nasua registrados en estudios anteriores con
diferentes métodos. n.r. = valores no reportados, aunque se indica en el estudio. - ítems que no fueron mencionadas en
el estudio. a contenido del estómago; bobservación directa; c análisis de las heces.
Bisbal
1986a
Redford &
Stearman
1993a
Beisiegel
2001b
Alves-Costa
et al. 2004c
Santos &
Beisiegel
2006c
Hirsch
2009b
This
articlec
n =3
n = 11
n = 32
n = 226
n = 60
n = 4648
n = 56
Mammals
-
40.0
-
0.9
-
-
41.1
Birds
-
-
-
2.2
-
<0.1
21.4
33.0
-
-
0.9
-
Amphibians
-
-
-
0.4
-
<0.1
14.3
Fish
-
-
-
0.4
-
<0.1
-
Eggs
-
-
-
2.2
-
n.r.
2.2
Vertebrates
Reptiles
Unknown
vertebrates
8.9
10.7
10.7
Invertebrates
Arachnids
-
30.5
-
36.6
-
7.1
100.0
-
-
75.7
13.5
100.0
Millipedes
-
-
-
53.9
-
-
Crustaceans
-
-
-
-
1.7
-
Gastropods
-
-
-
2.6
-
-
Unknown
invertebrates
33.0
-
n.r.
-
-
Plants
33.0
65.9
43.8
85.4
96.6
14.0
85.7
Domestic food
-
-
-
-
31.6
5.0
60.7
Waste
-
-
-
9.7
-
n.r.
30.4
Insects
resources of fered by humans have already
been obser ved for other mammalian species
such as tufted capuchins (Cebus sp.; Sabbatini
et al. 2006, Sabbatini et al. 2008). This behavior
can culminate in replacement of the natural
diet with inappropriate food of low nutritional
status, resulting in nutritional deficit. Moreover,
the consumption of adulterated or poorly
conserved anthropogenic items in food waste
deposits can alter gastrointestinal function
as well as compromise the immune system
and general health of the animals (Sabbatini
et al. 2006). This situation is worsened by
80.0
-
intake of industrialized food or nondigestible
materials such as plastic, paper, aluminum,
and Styrofoam. It is worth highlighting that
these wild animals are subject to aggression by
humans and domestic animals and risk being
hit by vehicles when they leave the forest in
search for food.
Bearing in mind the role of seed dispersal
in the maintenance of the majority of the plant
species in tropical forests (Jazen 1980, CharlesDominique et al. 1986, Stoner et al. 2007),
modifications in the coati feeding behavior may
reduce its potential role as a seed disperser
FERREIRA ET AL.
102
(Alves-Costa et al. 2004, Costa & Mauro 2008).
This scenario has also been documented by
Sheldon (1992) in studies of the crab-eating fox
(Cerdocyon thous [Linnaeus, 1766]).
The dynamics of these small fragments
and the biology of the coati are little known
and more detailed knowledge is necessary for
planning management strategies. Mitigating
actions are urgent and need to be promptly
applied to preser ve coatis as well as other
ver tebrates and to minimize the problems
related to the interaction between humans and
wild animals.
ACKNOWLEDGMENTS: We thank Instituto de Pesquisas
Cananéia (IPeC), Universidade Presidente Antônio Carlos
and the Federal University of Juiz de Fora for scientific and
logistic support. We thank the researchers Desvaux JS and
Gómez DE, for his contribution in reviews in the Spanish
language. We also thank Coordenação de Aperfeiçoamento
de Pessoal de Nível Superior - CAPES for the Master
scholarship granted to G. A. F.
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