Some life-history parameters of the non-native amphipod Platorchestia platensis (Talitridae) in a warm temperate South African estuary

Hodgson, Alan N; Booth, Anthony J; David-Engelbrecht, Viginia; Henninger, Tony O

Title: Some life-history parameters of the non-native amphipod Platorchestia platensis (Talitridae) in a warm temperate South African estuary
Creator: Hodgson, Alan N
Creator: Booth, Anthony J
Creator: David-Engelbrecht, Viginia
Creator: Henninger, Tony O
Date Issued: 2014
Date: 2014
Type: text
Type: article
Identifier: http://hdl.handle.net/10962/126976
Identifier: vital:35940
Identifier: https://doi.10.1080/0035919X.2014.941961
Description: Density, population structure, growth, mortality and aspects of reproduction of the non-native amphipod Platorchestia platensis were studied for 20 consecutive months (October 2008 to May 2010) in the supralittoral wrack of the Knysna Estuary, South Africa. Amphipod density varied over the sampling period with the lowest numbers recorded in summer (January and February). Ovigerous females with embryos, and juveniles were found in most months with peaks in recruitment found in both April and October, suggesting that in Knysna this species is a biannual breeder. Average female size was significantly greater in winter, with larger females tending to brood more embryos. The largest adults (13.5 mm total length) were always male although the monthly sex ratio was nearly always female biased. Growth rate estimated from a cohort analysis was about 1 mm per month and monthly survival about 69%. The ability to reproduce all year round may be one reason why this introduced species has become established within this warm temperate estuary.
Format: 11 pages
Format: pdf
Language: English
Relation: Transactions of the Royal Society of South Africa
Relation: Hodgson, A.N., Booth, A.J., David-Engelbrecht, V. and Henninger, T.O., 2014. Some life-history parameters of the non-native amphipod Platorchestia platensis (Talitridae) in a warm temperate South African estuary. Transactions of the Royal Society of South Africa, 69(2), pp.97-106
Relation: Transactions of the Royal Society of South Africa volume 69 number 2 97 106 2014 0035-919X
Rights: Transactions of the Royal Society of South Africa
Rights: Use of this resource is governed by the terms and conditions of the Taylor & Francis Online Terms and Conditions Statement (https://www.tandfonline.com/terms-and-conditions)

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Booth, Anthony John (Prof)

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RU Department of Ichthyology and Fisheries Science

RU Department of Zoology and Entomology

SDG 14. Life Below Water

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