Results 111 to 120 of about 26,142 (272)

Phenotypic integration of brain size and head morphology in Lake Tanganyika Cichlids

BMC Evolutionary Biology, 2014
BackgroundPhenotypic integration among different anatomical parts of the head is a common phenomenon across vertebrates. Interestingly, despite centuries of research into the factors that contribute to the existing variation in brain size among ...
Masahito Tsuboi, Alejandro Gonzalez-Voyer, N. Kolm   +2 more
semanticscholar   +1 more source

Coercive mating has no impact on spatial learning, cognitive flexibility, and fecundity in female porthole livebearers (Poeciliopsis gracilis)

Journal of Fish Biology, EarlyView.
Abstract Coercive mating is a sexual selection strategy that is likely to influence female cognition. Female harassment levels have been linked to altered brain gene expression patterns and brain size evolution, suggesting females may respond to coercive mating by investing energy into “outsmarting” males.
Tiffany R. Ernst, R. M. H. W. Hogers, A. Korosi, J. L. van Leeuwen, A. Kotrschal, Bart J. A. Pollux   +5 more
wiley   +1 more source

Distribution and abundance of cichlids in the New Calabar River, Nigeria

Journal of Fisheries, 2018
This study was conducted to study the distribution, abundance and diversity of the cichlids in the New Calabar River, Nigeria. A total of 1073 cichlids belonging to ten species and seven genera (Coptodon guineensis, C. zillii, C.
Olaniyi Alaba Olopade, Henry Eyina Dienye   +1 more
doaj   +3 more sources

Reproductive ecology of a neotropical cichlid fish, Cichla monoculus (Osteichthyes: Cichlidae)

Brazilian Journal of Biology, 2003
The reproductive ecology of the freshwater fish Cichla monoculus Spix, 1831 (Osteichthyes: Cichlidae) was investigated in the Campo Grande Reservoir, Northeast Brazil.
Chellappa S., Câmara M. R., Chellappa N. T., Beveridge M. C. M., Huntingford F. A.   +4 more
doaj  

A preliminary assessment of water quality in fish cages on Lake Kariba, Zimbabwe [PDF]

, 1994
The water quality in fish cages on Lake Kariba was studied. The Kruskal-Wallis test was used to determine whether the water quality parameters differed significantly among the cage-types (cage-type effect). Secchi disc readings ranged from 2 to 4 metres,
Mhlanga, W.
core  

Multiple Episodic Evolution Events in V1R Receptor Genes of East-African Cichlids

Genome Biology and Evolution, 2014
Fish use olfaction to detect a variety of nonvolatile chemical signals, and thus, this sense is key to survival and communication. However, the contribution of the olfactory sense to social—especially reproductive—interactions in cichlids is still ...
M. Nikaido, T. Ota, T. Hirata, Hikoyu Suzuki, Y. Satta, Mitsuto Aibara, S. Mzighani, C. Sturmbauer, K. Hagino‐Yamagishi, N. Okada   +9 more
semanticscholar   +1 more source

Lungfish‐like antero‐labial tooth addition and amphibian‐like enameloid‐enamel transition in the coronoid of a Devonian stem actinopterygian

Journal of Anatomy, EarlyView.
The tooth patterning logic, which cannot be inferred from surface morphology, is revealed by visualizing buried tooth remnants in 3D. The primary teeth are added labially, initially organized in radial rows, which transition into linear rows where the coronoid becomes slender.
Donglei Chen
wiley   +1 more source

Reproductive ecology of a neotropical cichlid fish, Cichla monoculus (Osteichthyes: Cichlidae)

Brazilian Journal of Biology
The reproductive ecology of the freshwater fish Cichla monoculus Spix, 1831 (Osteichthyes: Cichlidae) was investigated in the Campo Grande Reservoir, Northeast Brazil.
S. Chellappa, M. R. Câmara, N. T. Chellappa, M. C. M. Beveridge, F. A. Huntingford   +4 more
doaj   +1 more source

Africa: the FBA connection [PDF]

, 1986
Since its inception in the 1930's the Freshwater Biological Association at Windermere, England has been involved in research on African lakes and rivers.
Fryer, G., Talling, J.F.
core  

A revision of the genus Astatoreochromis (Teleostei, Cichlidae), East-Africa [PDF]

, 2013
A taxonomic revision of the cichlid genus Astatoreochromis is presented. Eighteen meristic and 23 morphometric measurements were taken on 185 individuals, including type specimens.
Banyankimbona, Gaspard, Snoeks, Jos, Vreven, Emmanuel   +2 more
core   +3 more sources