Low ph water impairs the tactile sense of the postlarvae of the giant freshwater prawn Macrobrachium rosenbergii
Download URL
www.tlsr.usm.myDate
2018Author
Page views
2,957ASFA keyword
AGROVOC keyword
Metadata
Show full item recordShare
Abstract
The effect of low pH on the tactile sense of Macrobrachium rosenbergii postlarvae was determined in the laboratory by means of two behavioural assays: shelter (netting) occupancy and jumping response to touch stimuli (taps) by a glass micropipette. The postlarvae were acclimated to pH 4, pH 5, pH 6 and pH 7.5 (control) in 45 L aquaria 5−7 d before the experiments. Shelter occupancy decreased with pH and was significantly lower at pH 4 and pH 5 than at pH 6 and in the control. The jumping response instantly followed a tap 93−98% of the time in the control, pH 6 and pH 5 treatments. However, the postlarvae showed significantly lower jumping response (65%) at pH 4, indicating an impaired tactile sense. Low pH 4−5 probably degrades the chitin of the sensory setae and inhibits the surface mechanoreceptors of the prawn postlarvae.
Suggested Citation
Kawamura, G., Bagarinao, T., Yong, A. S. K., Noor, S. N., & Lim, L.-S. (2018). Low ph water impairs the tactile sense of the postlarvae of the giant freshwater prawn Macrobrachium rosenbergii. Tropical Life Sciences Research , 29(1), 103-112. https://doi.org/10.21315/tlsr2018.29.1.7
Type
ArticleISSN
1985-3718; 2180-4249Collections
- Journal Articles [1267]
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/
Related items
Showing items related by title, author, creator and subject.
-
Some limnological features of the northern shore areas of Volcano Island, Lake Taal
(Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)Physico-chemical and biological features of the northern shore areas of Volcano Island, Lake Taal observed at monthly intervals from four stations during the period 1994 and 1996 indicate varied microhabitats inhabited by a variety of plants and animals. Physico-chemical characteristics of surface waters were: temperature, 28-35°C; dissolved oxygen content, 3.5-6.2 ppm; pH, 7.5-8.9; salinity, 0-24 ppt; and conductivity, 1.6-4.3 S cm-1. Substratum types were mainly sandy with pebbles or rocks or sandy-muddy. Characteristic submerged plants were the eelgrass Vallisneria gigantea and filamentous green algae. In the eelgrass region, atyid shrimps, mostly Ciridina gracilirostris, commonly occur. Snails such as Melanoides costellaris and Terebia granifera were the most abundant benthic animals collected. Other invertebrates identified from core samples were Corbicula manilensis, annelids, crustaceans and chironomid larvae. -
Thailand's concerns in endangered species and stock enhancement
(Aquaculture Department, Southeast Asian Fisheries Development Center, 2006)The paper provides a comprehensive list of endangered freshwater, brackishwater, and marine aquatic species in Thailand. The Thai Department of Fisheries is breeding some of the endangered species under the “Rehabilitation of Thai Local Fishes and Aquatic Animals Project.” Some of these species are bred for restocking in the wild. -
Status of threatened species and stock enhancement activities in the Philippine fisheries
(Aquaculture Department, Southeast Asian Fisheries Development Center, 2006)The paper provides the lists of fisheries related species perceived to be extinct, rare, threatened and endangered as covered under the CITES, IUCN and the Bureau of Fisheries and Aquatic Resources (BFAR)-Fisheries Administrative Order (FAO) No. 208. The listings of freshwater fisheries resources constitute mostly finfishes that are all, except for one, found in the CITES list, the rest under the IUCN red lists and none in the BFAR list. Majority of the listed species are also specific to some areas like Lanao Lake, few in the RINCONADA lakes of Bicol and scarce in some other minor lakes where they are found to be endemic. Most of the indigenous cyprinid species are of commercial value to the locality and are the main source of fish protein in the daily life of the fisherfolk. The listings of marine finfishes constitute mostly sharks and seahorses which are all, except for one, found in the CITES list, the rest under the IUCN Red List and none in the BFAR-FAO list. Although BFAR listed 20 species of whales and dolphins under its FAO 208, marine mammals are not included in this report. Most of the indigenous shark species are becoming rare and extinct due to the rampant shark Status of Threatened Species and Stock Enhancement Activities in the Philippine Fisheries with the rising demand of shark fins smuggled or exported abroad. These marine finfishes are distributed in coastal waters. The listings of marine gastropods, mollusks, crustaceans and echinoderms are all found in the BFAR-FAO listings as Rare, Threatened and Endangered, while few and selective under the CITES and IUCN lists. Accordingly, these are the most common marine resource commodities that are over-exploited, gleaned and gathered illegally, and frequently exported or smuggled out of the country by unscrupulous traders.
