scholarly journals Parental behavior and some histological features of scales in Cichlasoma citrinellum (Pisces, Cichlidae)

1973 ◽  
Vol 51 (6) ◽  
pp. 619-622 ◽  
Author(s):  
David L. G. Noakes
Keyword(s):  
Fish Species ◽  
Parental Behavior ◽  
Cichlid Fish ◽  
Epidermal Thickness ◽  
Histological Features ◽  
Epidermal Mucus ◽  
Mucus Cells ◽  
Possible Cause

Young Cichlasoma citrinellum contact parents preferentially, depending on sex and color of the parents. The number of epidermal mucus cells on adults' scales is positively correlated with the amount of contacting by the young. The epidermal thickness of these scales is negatively correlated with the amount of contacting. These correlations are discussed as possible cause–effect relationships with the contacting preferences of the young, and are compared to similar behavior in other cichlid fish species.

scholarly journals Checklist and practical identification key for the cichlid fishes (Cichliformes: Cichlidae) of the La Plata drainage in Bolivia, including three new geographical records

2019 ◽  
Author(s):  
Pascal I. Hablützel ◽  
Robert B. Huanto
Keyword(s):  
Fish Species ◽  
Cichlid Fish ◽  
Identification Key ◽  
Museum Collections ◽  
Additional Species ◽  
Cichlid Fishes ◽  
La Plata ◽  
Bolivian Amazon ◽  
Voucher Specimens ◽  
Historia Natural

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.

Spatial and temporal repeatability in parasite community structure of tropical fish hosts

Parasitology ◽  
2003 ◽  
Vol 127 (4) ◽  
pp. 387-398 ◽  
Author(s):  
V. M. VIDAL-MARTÍNEZ ◽  
R. POULIN
Keyword(s):  
Community Structure ◽  
Marine Fish ◽  
Fish Species ◽  
Cichlid Fish ◽  
Positive Association ◽  
Parasite Community ◽  
Tropical Fish ◽  
Freshwater Species ◽  
Interspecific Associations ◽  
Red Grouper

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.

scholarly journals A complex mode of aggressive mimicry in a scale-eating cichlid fish

2015 ◽  
Vol 11 (9) ◽  
pp. 20150521 ◽  
Author(s):  
Nicolas Boileau ◽  
Fabio Cortesi ◽  
Bernd Egger ◽  
Moritz Muschick ◽  
Adrian Indermaur ◽  
...  
Keyword(s):  
Fish Species ◽  
Related Species ◽  
Lake Tanganyika ◽  
Cichlid Fish ◽  
Targeted Sequencing ◽  
Complex Mode ◽  
Cichlid Species ◽  
Aggressive Mimicry ◽  
Complex Interactions

Aggressive mimicry is an adaptive tactic of parasitic or predatory species that closely resemble inoffensive models in order to increase fitness via predatory gains. Although similarity of distantly related species is often intuitively implicated with mimicry, the exact mechanisms and evolutionary causes remain elusive in many cases. Here, we report a complex aggressive mimicry strategy in Plecodus straeleni , a scale-eating cichlid fish from Lake Tanganyika, which imitates two other cichlid species. Employing targeted sequencing on ingested scales, we show that P. straeleni does not preferentially parasitize its models but—contrary to prevailing assumptions—targets a variety of co-occurring dissimilar looking fish species . Combined with tests for visual resemblance and visual modelling from a prey perspective, our results suggest that complex interactions among different cichlid species are involved in this mimicry system.

Influences of Motivation On Display Divergences in Three Cichlid Fish Species (Haplochromis)

Behaviour ◽  
1983 ◽  
Vol 83 (3-4) ◽  
pp. 205-228 ◽  
Author(s):  
Kathy Carlstead
Keyword(s):  
Fish Species ◽  
Cichlid Fish ◽  
Motivational Factors ◽  
The Other ◽  
Temporal Association ◽  
General Factor ◽  
Motor Patterns ◽  
Signal Value ◽  
Activation Level ◽  
Male Intruder

AbstractDifferences between three cichlid fish species in responsiveness to a restrained territorial intruder have been investigated while an experimenter, considered a disturbing stimulus, was sitting 2 meters in front of the tank in view of the fish. The purpose of the analyses was to determine which motivational factors control responses to intruders and disturbances between Haplochromis elegans, H. squamipinnis, and H. angustifrons. This could be done on the basis of a model for the causal organization of these responses that was developed in an earlier paper (CARLSTEAD, 1982). It was found that H. angustifrons responds significantly less to the intruder than the other two species, and this is because it responds more to the experimenter. H. squampinnis hides from the experimenter in longer bouts than the other two. It was concluded that angustifrons has a basically higher activation level of system D (refer to model, Fig. 3), a system determining the responsiveness to stimuli indicative of potential danger and controlling motor patterns for hiding responses. Elegans has a relatively higher activation level of system T for responding to territorial intruders. Squamipinnis was found to have a higher level of a general factor for reactivity to all unexpected, thus novel stimuli. Species differences in courtship display were also investigated. These displays differ little between species, but each shows one particular display more often than expected in temporal association with spawning. This display proved in each species to be the display performed more often than expected to a restrained male territorial intruder in the behavior sequence after a conflict to approach it or withdraw from it had occurred (Turning-Around). Using the model, the motivational differences between the three species described above could account for the latter differences. If only one particular motivational configuration can be assumed to be required for a display to occur in any situation, then a approach/withdrawal conflict to a male intruder and a female showing willingness to spawn must elicit the same motivational configuration. It was concluded that species divergences in the activation level of certain motivational factors are reflected in this particular momentary motivational configuration. Characteristics of each species' ecological niche in Lake George, to which they are all endemic, have been discussed with respect to the factors selecting for these motivational divergences, It was concluded that the hypothesis is supported that adaptations for features of a species' habitat may cause divergences in display behavior that are not directly selected for their signal value. This occurs through selection for optimal activation levels of motivational factors that in the behavioral organization control both responsiveness to types of environmental stimuli and motor patterns of display.

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