scholarly journals Where Am I? Niche constraints due to morphological specialization in two Tanganyikan cichlid fish species

2020 ◽  
Vol 10 (17) ◽  
pp. 9410-9418
Author(s):  
Lukas Widmer ◽  
Adrian Indermaur ◽  
Bernd Egger ◽  
Walter Salzburger
2019 ◽  
Author(s):  
Pascal I. Hablützel ◽  
Robert B. Huanto

AbstractIn comparison with the Bolivian Amazon, the ichthyofauna of the La Plata drainage of Bolivia received relatively little attention historically. Until now, 14 species of cichlid fish have been registered from this area. After an exhaustive review of museum collections (Museo de Historia Natural Noel Kempff Mercado y Colección Boliviana de Fauna), we can report three additional species: Astronotus crassipinnis (Heckel, 1840), Mesonauta festivus (Heckel, 1840) and Satanoperca pappaterra (Heckel, 1840). Four other species, which have been listed in previous publications, can be confirmed for the La Plata drainage of Bolivia based on the examination of voucher specimens: Aequidens plagiozonatus Kullander, 1984, Apistogramma commbrae (Regan, 1906), A. trifasciata (Eigenmann & Kennedy, 1903) and Crenicichla vittata Heckel, 1840. As such, 16 of the 17 species can be referenced with voucher specimens in museum collections. We also provide an identification key for the cichlid fish species of the study area.


Hydrobiologia ◽  
2014 ◽  
Vol 748 (1) ◽  
pp. 87-97 ◽  
Author(s):  
Katarzyna Pisanski ◽  
Susan E. Marsh-Rollo ◽  
Sigal Balshine

Parasitology ◽  
2003 ◽  
Vol 127 (4) ◽  
pp. 387-398 ◽  
Author(s):  
V. M. VIDAL-MARTÍNEZ ◽  
R. POULIN

An assessment is made of the repeatability of parasite community structure in space for a marine fish, and in space and time for a freshwater fish from south-eastern Mexico. The marine fish species was the red grouper,Epinephelus morio(collected from 9 localities), and the freshwater species was the cichlid,Cichlasoma urophthalmus(collected from 6 localities: including monthly at 2 localities for 1 year, and bimonthly at 1 locality in 1990 and 1999). Pairwise interspecific associations and analyses of nested patterns in the distributions of parasite species among hosts were used in both fish species, with comparisons over time made only with the cichlid. Positive interspecific associations, and nested patterns were noted in some localities for both fish species, and/or at some sampling times for the cichlid fish. However, non-random patterns in the structure of parasite communities in these 2 host species only were observed sporadically. When present, nestedness in both fish species was apparently linked with a positive association between total infection intensities and fish size. Additionally, adjacent localities were more likely to display similar parasite community structure than distant ones. This preliminary result suggests that distance between localities is an important determinant of predictability in parasite community structure.


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