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Start Over Creator Beyer, Kathleen

1. Biometric data and bone identification of topmouth gudgeon, Pseudorasbora parva and sunbleak, Leucaspius delineatus

Creator:
Beyer, Kathleen, Miranda, Rafael, Copp, Gordon H., and Gozlan, Rodolphe E.
Type:
article and TEXT
Subject:
bones, alien species, cyprinids, native predators, and non-native
Language:
English
Description:
Biometric relationships between bone dimensions and body size are presented for topmouth gudgeon Pseudorasbora parva and sunbleak Leucaspius delineatus, two invasive fish species in the UK. This study also provides a tool for identification of these species using key bones. Such information facilitates the assessment of the potential role of these invaders in the diet of piscivorous fauna.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/

2. Hybridisation between Pseudorasbora parva and Leucaspius delineatus

Creator:
Gozlan, Rodolphe E. and Beyer, Kathleen
Type:
article and TEXT
Subject:
early life history, morphology, non-native, topmouth gudgeon, and sunbleak
Language:
English
Description:
Hybridisation between introduced and native species is an increasingly important issue concerning environmental stakeholders because it decreases genetic integrity of native stocks. However, hybridisation could also happen between non-native species even if these species belong to different genera. Our study illustrates this particular aspect of alien species invasion with the attempt of artificial hybridisation between sunbleak Leucaspius delineatus and topmouth gudgeon Pseudorasbora parva, both recent additions to the freshwater fish fauna of England. The crossed fertilisation of L. delineatus ova with P. parva sperm lead to viable eggs with a very high hatching rate of 86% although hybrids failed to develop beyond the 1st larval step. Early morphological development of these hybrids was quantified and compared to the early development of the pure bred species.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/