IDENTIFICATION AND DOCUMENTATION OF MANGROVES AND ASSOCIATED FAUNA ALONG DAKSHINA KANNADA COAST.
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Date
2019
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KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, KARNATAKA
Abstract
The present study was undertaken to identification and documentation of mangroves and
associated icthyofauna along Dakshina Kannada during the study period from October 2016 to
May 2017. Samples were collected monthly from three selected stations Talapady (S1),
Baikampady (S2), Sasihithlu (S3) using cast net and gill net of different mesh size. A total of
48 species of finfish species belonging to 32 genera, 23 families and 8 order were recorded. And
a total number of 9 species of Mangrove plants belonging to 8 genera, 5 families and 4 order
were recorded from all the three stations during the study period.
The present study deals with fish biomass and physico-chemical properties. Various
physico-chemical parameters such as air temperatures, surface water temperature, dissolved
oxygen, salinity and pH were at the ranges of 26.5 to 31.9°C, 27 to 31.2°C, 2.18 to 8.15 mg/l,
8 to 31.5‰, 6.7 to 8.1 respectively. Air temperature, surface water temperature, salinity, pH,
shows the positive correlation with fish biomass 0.86459, 0.60068, 0.664, 0.68324 respectively
and dissolve oxygen is negatively with fish biomass with “r” value -0.71149. The relationship
between tree density and total fish biomass at different stations showed positive correlation with
‘r’ value of 0.78819 and Fish biomass was found to be inversely related to the mangrove distance
from the creek.
Application of GPS based mapping help to measure the small patches of mangroves. A
total 45.2 hectares of mangrove areas are recorded along Dakshina Kannada coast, from
Talapady to Sasihithlu during study period.