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Start Over Creator Gozlan, Rodolphe E.

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. Could the small size of sunbleak, Leucaspius delineatus (Pisces, Cyprinidae) be an ecological advantage in invading British waterbodies?

Creator:
Gozlan, Rodolphe E., Pinder, Adrian C., Durand, Sarah, and Bass, Jonathan
Type:
article and TEXT
Subject:
bream Abramis brama, roach Rutilus rutilus, bleak Alburnus alburnus, rudd Scardinius erythrophthalmus, young-of-the-year, growth models, ageing, diet, invasive, and ecological impact
Language:
English
Description:
Since the introduction of sunbleak (Leucaspius delineatus) to southern England in 1986, its life history characteristics (such as reproductive behaviour, early sexual maturity and an unusually small adult size) have contributed to its rapid dispersal. This study examines the length-weight relationships and age of this non-indigenous cyprinid to highlight the potential threat to native 0+ cyprinids. Sunbleak populations demonstrated an unusual growth pattern for a cyprinid, with an average of 42 % of its maximum growth occurring in the first year, followed by extremely low annual growth until death. Very few significant differences were found between the mean length of several sunbleak age groups and the length of native 0+ bream Abramis brama, roach Rutilus rutilus, bleak Alburnus alburnus and rudd Scardinius erythrophthalmus. We have also found that young-of-the-year of these cyprinids share the same food and habitat with all sunbleak year class, which in some places has had a detrimental impact on the recruitment of native species.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/

3. 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/