Respiration rate and swimming activity of larvae of two sub-tidal nassariid gastropods under reduced oxygen levels: Implications for their distributions in Hong Kong waters

C. C. Liu; J. M Y Chiu; L. Li; P. K S Shin; S. G. Cheung

doi:10.1016/j.marpolbul.2011.03.014

Author(s)

C. C. Liu
J. M Y Chiu
L. Li
P. K S Shin
S. G. Cheung

Related Research Unit(s)

State Key Laboratory of Marine Pollution (City University of Hong Kong)

Detail(s)

Original language	English
Pages (from-to)	230-236
Journal / Publication	Marine Pollution Bulletin
Volume	63
Issue number	5-12
Publication status	Published - 2011

Link(s)

DOI	DOI https://doi.org/10.1016/j.marpolbul.2011.03.014 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-79960361231&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(09c023a5-1f0c-41cb-b8c6-ef8f7352a3df).html

Abstract

The effects of hypoxia on the larvae of two sub-tidal nassariid gastropods, Nassarius siquijorensis and N. conoidalis were compared so as to understand how the species-specific tolerance to hypoxia might have resulted in changes in the abundance and distribution of these two species in the hypoxic Tolo Harbour, Hong Kong, since the 1980s. Respiration rates of N. siquijorensis and N. conoidalis larvae were reduced at 4.5mg O₂ l^-1, or below, as compared with the normoxic control. Significant reduction in swimming velocity was also observed for 10-day old larvae which were exposed to 2 l^-1 for N. siquijorensis and 2 l^-1 for N. conoidalis. The 48h LC₅₀ values of N. siquijorensis and N. conoidalis larvae were 0.7 and 1.7mg O₂ l^-1, respectively. The results suggested that N. siquijorensis are more tolerant to hypoxia than N. conoidalis. © 2011 Elsevier Ltd.