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INT. J. BIOL. BIOTECH., 12 (4): 579-584, 2015.
A SURVEY OF SMOOTH-COATED OTTER (LUTROGALE PERSPICILLATA
SINDICA) AND FISHING CAT (PRIONAILURUS VIVERRINUS) IN CHOTIARI
RESERVOIR, SANGHAR, PAKISTAN USING CAMERA TRAPS
Saeedul Islam, Rab Nawaz and Muhammad Moazzam
WWF-Pakistan, 46-K, PECHS Block 6, Karachi 75400, Pakistan (saeedislam2001@yahoo.co.uk)
ABSTRACT
Chotiari Reservoir located in District Sanghar, Sindh, Pakistan is known for its high biodiversity. Several threatened
species of animals and plants including smooth coated otter (Lutrogale perspicillata sindica) and fishing cat
(Prionailurus viverrinus) are known to abound this wetland. A survey for authenticating the presence and active
nesting sites of smooth coated otter and fishing cat was conducted during 2012. Two of the four installed camera traps
have captured photos of fishing cat whereas two cameras were successful in photographing a family of smooth-coated
otter composed of five individuals. The survey confirmed the presence of two species which otherwise considered to be
rare or locally extinct.
Keywords: Camera trapping, Chotiari Reservoir, Smooth-coated otter, Lutrogale perspicillata sindica, Fishing cat,
Prionailurus viverrinus.
INTRODUCTION
Chotiari Reservoirs which is located in District Sanghar, Sindh, is considered as a favorable habitat for a variety
of mammals including 14 large and 24 small mammals (Khan and Hasnain, 2008). A number of these mammals
were not sighted directly but their presence was recorded on information provided by locals or scanty scientific clues
(Rais et al., 2010, 2011). Information about some of these mammals such as smooth-coated otter (Lutrogale
perspicillata sindica) and fishing cat (Prionailurus viverrinus) is based entirely on hearsay and accounts of the
locals (Rais et al., 2009). The presences of these species have also been reported from various parts of Pakistan
including Chotiari Reservoir by Khan et al., (2010, 2013) through indirect records. Rais et al., (2009) carried out
study on the population of smooth-coated otter in Sindh province and reported the confirmed presence of only few
individuals. They observed six healthy cubs of smooth-coated otter at Chotiari Reservoir which is the only
confirmed proof of this species in the area. The remaining information about this species was based on indirect
evidence such as foot prints whereas no adult was observed by them.
There are no two opinions that some mammal and reptile species are very hard to observe due to their shy and
nocturnal habits. Although methods of animal counting, assessment and monitoring using foot prints, calls, burrows,
colonies, food remains and scats observations were previously being used, however, emerging new technologies
such as camera trapping, satellite monitoring systems etc. are gaining popularity in animal research (Karanth and
Nichols, 1998; Kucera and Barrett, 1993; Mace et al., 1994; Silveira et al., 2003; Jenks, 2011). Camera trap
technologies are used especially in those areas that hard to access due to dense forests, vegetation cover where live
trapping, sighting or even indirect sighting methods could not be used (Mohd-Azlan and Lading, 2006; Bernard et
al., 2013). In Chotiari Reservoir, no previous record of camera trapping is available for verification and population
assessment of any animal.
In order to authenticate the presence and record any behavioral aspects of smooth-coated otter and fishing cat
camera trapping was used. The present paper reports the results of the camera trapping made in 2012.
MATERIAL AND METHODS
Study Site
Sanghar District has large complex of brackish and freshwater wetlands comprised of small ponds, large lakes,
irrigation canals, storage reservoirs (Rais et al., 2008). It is a semi-natural reservoir having a complex of terrestrial
and aquatic ecosystems of freshwater, brackish lakes and shallow marshes having patches of riverine forests,
agriculture lands, and sand dunes in North known as “Achro Thar” (Khan and Hasnain, 2008). The historical Nara
Canal covers its north eastern and eastern boundaries.
The reservoir is spread over 13 kilometers wide and 16 km long area and occupies an area of about 64,000 acres
with water storage capacity of about 0.71 million acre feet. Complex of Chotiari Lakes was flanked by a rich flora of
580 SAEEDUL ISLAM ET AL.,
INTERNATIONAL JOURNAL OF BIOLOGY AND BIOTECHNOLOGY 12 (4): 579-584, 2015.
riverine forest along the embankment of Nara river course (Fig.1). This reservoir is known to have rich mammal
population including smooth-coated otter and fishing cat but no sighting of these animals is reported from the area.
Fig. 1. Map of Chotiari Reservoir showing camera trapping site.
Fig. 2. Camera traps installed for capturing photos.
A SURVEY OF SMOOTH-COATED OTTER AND FISHING CAT USING CAMERA TRAPS 581
INTERNATIONAL JOURNAL OF BIOLOGY AND BIOTECHNOLOGY 12 (4): 579-584, 2015.
In order to verify the presence of smooth-coated otter and fishing cat in Chotiari Reservoir a reconnaissance
survey was conducted to assess the hotspot of these mammals by using direct and indirect sighting technique and
local community interviews. An estimate of the smooth-coated otter has been made based on this survey. Habitat
was evaluated during the survey. Safe and active sites were identified for installation of the camera traps. Total of
four active sites were identified with the help of local community. All the sites were situated inside the Chotiari
Reservoir near Makhi Forest. The sites have very limited anthropogenic activities thus considered as appropriate for
camera trapping.
The selected sites were densely covered by the wild plant species as Typha elephantina, Typha domingensis,
Phragmites karka, Phyllanthus reticulatus, Alhagi maurorum Luffa echinata, Schoenoplectus litoralis, Tamarix
aphylla, Tamarix indica, Acacia nilotica and other herbaceous hydrophytes e.g. Bacopa monnieri, Phyla nodiflora,
Cynodon dactylon, Cyperus rotundus, Cyperus bulbosus etc.
Four of Reconyx HyperFire PC 800 with elimination range of 70 ft. taking 3.2 MP color picture by day and
monochrome by night, capable to take 2 frames per second. The camera traps has infrared sensors to detect animal
movement and automatically captured the movements. New batteries were installed that capable to capture 10,000
pictures. The cameras were set on automatic mode with 1 frame per second/trigger on normal mode. Before
installing the cameras was passed through walk test to ensure the results. All the cameras were installed at right
angle just 1.5-2 feet above the ground level (Fig. 2). The data were accumulated with every three days interval from
the cameras and analyzed on the spot.
RESULT AND DISCUSSION
While selecting the sites for installation of the camera traps an estimate of the population of smooth-coated otter
was made (Table 1) which is based primarily on the account of locals and animals foot prints. The survey indicates
that there is a healthy population of smooth-coated otter in the Chotiari Reservoirs, however, this survey did not
include any direct sighting of the otters.
Table 1. Estimates of population of smooth-coated otter in the Chotiari Reservoirs based on accounts of locals and
foot prints.
Area
Locations
Estimated
Population
Bakar
Old Bakar Lake near Bakar village
6
Near outlet
Fish farms between Bakar and outlet of the reservoir
10
Outlet to Pakseri
Outside of the reservoir, natural ditches and fish farms
20
Pakseri to Lal Bux
Unnar village
Inside and outside of the reservoir seepage and fish forms
30
Pumping station
Akenwari
Pumping station to inlet of the reservoir (outside of the reservoir)
20
Total
86
Camera traps have been extensively used for population estimates and behavior of other species
(Leuchtenberger et al., 2014; Prakash et al., 2012) but authors have no information about their use for estimating
population of smooth-coated otters. Fishing cat has been studied through camera trap by Karki (2011) and Lynam et
al., (2013). During initial part of the present study, four camera traps (numbered as 1 to 4) that were deployed near
Makhi Forest, Chotiari Reservoir did not take any photographs of the targeted species except few birds including
Acridotheres tristis (Common myna), Ixobrychus cinnamomeus (Cinnamon bittern) and Amaurornis phoenicurus
(White-breasted waterhen). During the third week of the survey camera no. 3 was taken monochrome photographs
of a fishing cat (Fig.3). The camera no. 1 and 2 successfully captured monochrome and colour photographs of a
family of smooth-coated otter having five members in the group visited about three time of the same location at
different timings within 24 hours (Fig. 4). These otters were observed resting and playing within the group (Table
2). Camera no.4 was also success to capture a fishing cat but unfortunately the pictures was out of focus as the cat
was very near the camera but its identification is confirmed because of shape of animal and markings thereupon.
582 SAEEDUL ISLAM ET AL.,
INTERNATIONAL JOURNAL OF BIOLOGY AND BIOTECHNOLOGY 12 (4): 579-584, 2015.
Fig. 3. Camera trap # 3 & 4 showing fishing cat.
Fig. 4. Camera traps # 1 & 2 showing smooth-coated otter).
Table 2. Details of captured photos of smooth-coated otter and fishing cat at Chotiari Reservoir.
The percentage of captured photographs is given which reveals that fishing cat was observed 33 % of the
captured times of camera whereas smooth coated otters occupied 30 % of the time where birds were observed at 27
% of the captured time and at 10 % time there photograph capture was empty.
Fishing cat food consists of fish and other small animals including crabs, invertebrates and birds which are
hunted by the cat (Haque and Vijayan, 1993). During the survey, fishing cat was observed in the same area where
smooth-coated otter were noticed especially on those places where the otter usually eat their prey. The fishing cat
Camera
Species
Date
Time
Temperature
Number of
frames
01
Smooth-coated
0tter
22-07-2012
08:32:03-8:33:47 AM
30°C
06
Smooth-coated
otter
22-07-2012
10:30:44-10:31:12 AM
34°C
06
02
Smooth-coated
otter
22-07-2012
05:38:27-05:38:29 AM
28°C
05
Smooth-coated
otter
22-07-2012
08:26:46-08:33:44 AM
30°C
18
Smooth-coated
otter
22-07-2012
10:30:06-10:30:09 AM
37°C
05
03
Fishing cat
20-07-2012
07:58:51-07:58:54 PM
31°C
03
Fishing cat
21-07-2012
06:43:39-06:43:50 PM
36°C
08
04
Fishing Cat
21-07-2012
05:41:58-05:43:10 AM
26°C
30
A SURVEY OF SMOOTH-COATED OTTER AND FISHING CAT USING CAMERA TRAPS 583
INTERNATIONAL JOURNAL OF BIOLOGY AND BIOTECHNOLOGY 12 (4): 579-584, 2015.
visits this area to consume the remains of the fish eaten by otters. This association between two carnivorous
mammal species observed during the present study where fishing cat which is a predator hunting for aquatic animals
also scavenge on the food remains of smooth-coated otters. While working on camera trapping it was noticed that
the foraging success generally increases within the mixed mammalian associations (Venkataraman, 2015). The
association between two carnivorous mammal species observed during the present study required further studies for
detail inter-species behavior and association type.
Fishing cat is an endangered animal according to the IUCN Red List whereas, smooth-coated otter is considered
vulnerable with decreasing population trend. There is a need to study the detailed ecology of these important
animals by using camera trap technology as well as collection of information about of the biology the two species in
the area.
The study proved that camera trapping is a cost and time efficient method for rapid assessment and to determine
status, abundance and occurrence of wildlife in a particular area, it is generally used for the confirmation of the
presence of particular species. Several researchers published paper on the otter presence at Chotiari Reservoir but
not directly observed them however, the camera trapping survey has confirmed the presence of healthy population of
this precious species in the Chotiari wetland habitat.
Acknowledgments
The authors are indebted to the fishermen of the Chotiari Reservoir especially Mr. Manthar Ali Leghari, Mr.
Shakoor Ahmed Leghari and Mr. Ghulam Hussain Leghari who have helped in site selection and installation of the
camera traps. They offer their thanks to WWF-Pakistan’s staff posted at Chotiari Reservoir for their support and
assistance. The authors are thankful to Dr. Ejaz Ahmad, Dr. Ghulam Akbar and Mr. Umair Shahid of WWF-
Pakistan for their encouragement and support for the study.
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(Accepted for publication October 2015)