scholarly journals Behavioral and Biophysical Studies of Dugong (Dugong dugon) Habitat in Waters Mali Beach, Kabola District, Indonesia.

2021 ◽  
Vol 934 (1) ◽  
pp. 012077
Author(s):  
P E Plaimo ◽  
I L Wabang ◽  
A Hendrizal

Abstract Dugongs are generally shy animals, so observing their existence is very limited to hundreds of meters. In contrast to the behavior of Dugong who lives in the coastal waters of Mali, Kabola Regency, Indonesia. Its uniqueness can interact with humans at a very close distance and can even be on the back. It is, therefore, necessary to explore other behavioral patterns and habits and biophysical habitats of Dugongs as information to maintain their survival. This research aims to find out the behavior and biophysics of dugong habitat in the coastal waters of Mali, Kabola Subdistrict, Indonesia. The study uses direct observation methods in the form of observing the characteristics and biophysical conditions of dugong habitats including (1) determining dugong activity areas using GPS coordinates; (2) observe habitat characteristics and biophysical conditions by observing biotic and abiotic conditions, and (3) measuring physicochemical parameters, namely temperature, salinity, and pH. Next, to observe the daily behavior of dugongs when interacting with their habitat environment in the form of time: breathing, going around the boat, swimming at the bottom, swimming on the surface, swimming in the water column, resting at the bottom, eating and exposing the back. In the observations, dugongs swimming around the ship immediately responded and then approached and rubbed his body to the leg then through the pectoral fins that tried to hug to get a leg on the model being tested. Then turn under the boat and remove the penis. In general, the biophysical conditions of sandy and dense habitats are overgrown with seagrass.

2013 ◽  
Vol 71 (4) ◽  
pp. 925-929 ◽  
Author(s):  
Ryosuke Ohata ◽  
Reiji Masuda ◽  
Kohji Takahashi ◽  
Yoh Yamashita

AbstractWe evaluated the effects of turbidity on school formation in ayu (Plecoglossus altivelis) [24.5 ± 2.2 mm standard length (Ls)], Japanese anchovy (Engraulis japonicus) (29.1 ± 3.1 mm Ls) larvae, which often live in turbid coastal waters, and yellowtail (Seriola quinqueradiata) juveniles (37.1 ± 2.5 mm Ls), which live in clear offshore waters. Fish were introduced into experimental tanks at one of five turbidity levels obtained by dissolving 0, 5, 20, 50, or 300 mg l−1 of kaolin in seawater. Their behaviour was video recorded, and the nearest neighbour distance (DNN) and separation angle (AS) were compared among turbidity levels. Mean DNN of ayu was significantly smaller at 20 and 50 mg l−1 than any other level of turbidity, as was AS at 20 mg l−1 compared with 0 mg l−1. Mean AS of anchovy was smaller at 50 mg l−1 of turbidity than any others. In contrast, mean DNN of yellowtail was larger at 300 mg l−1 than any others. These results suggest that moderate turbidities enhance schooling behaviour in ayu and Japanese anchovy larvae, whereas turbidity has an inhibitive effect on schooling of yellowtail juveniles, corresponding well to the habitat characteristics of each species.


2019 ◽  
Vol 29 (10) ◽  
pp. 1681-1696 ◽  
Author(s):  
Sui Hyang Kuit ◽  
Louisa Shobhini Ponnampalam ◽  
Jol Ern Ng ◽  
Ving Ching Chong ◽  
Amy Yee‐Hui Then

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Muddula Krishna Naranji ◽  
Govinda Rao Velamala ◽  
Sujatha Knadula

Based on two specimens of the flasher scorpionfish, species of Scorpaenopsis macrochir Ogilby, 1910 (85-96 mm, TL) collected from the Visakhapatnam coastal waters, India, we described S. macrochir as the new record from Indian waters. This species is characterized by having 12 dorsal spines, medial surface of pectoral fins with a black subterminal band along entire margin of fin; supraorbital spine ending in a single spinous point and unserrated ocular spines. Nasal spines usually divided into two to six small points. The present study describes full description of the species with illustration.


1991 ◽  
Vol 36 (1) ◽  
pp. 22-24
Author(s):  
Roger Bakeman
Keyword(s):  

2014 ◽  
Author(s):  
Matthias R. Mehl ◽  
Kathryn Bollich ◽  
John M. Doris ◽  
Simine Vazire

2014 ◽  
Author(s):  
Kathryn L. Bollich ◽  
Simine Vazire ◽  
John M. Doris ◽  
Matthias R. Mehl
Keyword(s):  

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