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Title: | Predicting amphipods' brood size variation in brackish environments: an empirical model for Corophium multisetosum Stock, 1952 (Corophiidae) in Ria de Aveiro (NW Portugal) |
Author: | Cunha, M. R. Moreira, M. H. Sorbe, J. C. |
Keywords: | Amphipods Brackish-water Fecundity Model Ria de Aveiro |
Issue Date: | 31-May-2000 |
Publisher: | Elsevier |
Abstract: | Data on fecundity of Corophium multisetosum from Areao (Ria de Aveiro, Portugal) are analysed by non linear regression to quantify the relationship between brood size (N-e) and head length (L-h, in mm), water temperature (T, in: degrees Celsius) and salinity (S, in psu). The aim of the analysis is to obtain a simple line N-e = a + bL(h), in which the slope (b) and the gamma intercept (a) are functions of salinity and/or temperature on each sampling occasion. The equation N-e = (-2.940 - 8.027S + (-89.431 + 18.171S + 12.904T - 0.368T(2)) L-h explains 64% of the variability of brood size throughout the breeding period. The model predicts an optimal temperature around 18 degrees C and a very low fecundity at low salinities. The graphical comparison of the lines obtained by the model and by a usual linear regression illustrates its potential usefulness to predict fecundity changes. The authors suggest that the observed variation in the fecundity of other brackish-water amphipods can be described and predicted using similar models. (C) 2000 Elsevier Science B.V. All rights reserved. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/10324 |
DOI: | 10.1016/S0022-0981(00)00164-7 |
ISSN: | 0022-0981 |
Appears in Collections: | DBio - Artigos Ria de Aveiro - Artigos |
Files in This Item:
File | Description | Size | Format | |
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05_Cunha_etal_2000b.pdf | Documento principal | 279.27 kB | Adobe PDF |
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