Results 71 to 80 of about 16,811 (235)
The genetic and developmental basis of an exaggerated craniofacial trait in East African cichlids.
Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2015 The evolution of an exaggerated trait can lead to a novel morphology that allows organisms to exploit new niches. The molecular bases of such phenotypes can reveal insights into the evolution of unique traits.
Moira R. Concannon, R. Albertson
semanticscholar +1 more source
Optimism and pessimism: a concept for behavioural ecology
Biological Reviews, EarlyView.ABSTRACT Originating from human psychology, the concepts of “optimism” and “pessimism” were transferred to animal welfare science about 20 years ago to study emotional states in non‐human animals. Over time, “optimism” and “pessimism” have developed into valuable welfare indicators, but little focus has been put on the ecological implications of this ...
Viktoria Siewert +3 more
wiley +1 more source
Strong biomechanical relationships bias the tempo and mode of morphological evolution
eLife, 2018 The influence of biomechanics on the tempo and mode of morphological evolution is unresolved, yet is fundamental to organismal diversification. Across multiple four-bar linkage systems in animals, we discovered that rapid morphological evolution (tempo ...
Martha M Muñoz +3 more
doaj +1 more source
Serial monogamy benefits both sexes in the biparental convict cichlid [PDF]
PeerJ, 2019 Monogamy can be either long-term or serial, with new pairs formed with each breeding bout. Costs and benefits are associated with each strategy. Because biparental convict cichlids (Amatitlania nigrofasciata) typically switch mates, exhibiting serial ...
Jennifer L. Snekser, Murray Itzkowitz
doaj +2 more sources
Cladistics, EarlyView.Abstract Proteocephalids are a cosmopolitan and diverse group of tapeworms (Cestoda) that have colonized vertebrate hosts in freshwater and terrestrial environments. Despite the ubiquity of the group, key macroevolutionary processes that have driven the group's evolution have yet to be identified.
Philippe Vieira Alves +7 more
wiley +1 more source
Tit for Tat in the Dear Enemy Relationship Between Territorial Females of a Cichlid Fish
Frontiers in Ecology and Evolution, 2018 Many territorial animals reduce aggression toward their neighbors once territorial boundaries are established. This relationship is called the dear enemy phenomenon, hypothetically based on a conditional strategy like tit for tat (TFT).
Shumpei Sogawa, Masanori Kohda
doaj +1 more source
Evolution &Development, EarlyView.By performing a genetic association study in cave × surface fish F2 hybrids, we discovered that premaxilla width, dentary length, and maxillary length are all significantly associated with a region on Chromosome 13 containing 109 genes. ABSTRACT The regulation of bone size is a poorly understood and complex developmental process.
Amanda K. Powers +7 more
wiley +1 more source
Computer Simulations to Study Sympatric Speciation Processes [PDF]
arXiv, 2005 We perform simulations based on the Penna model for biological ageing, now with the purpose of studying sympatric speciation, that is, the division of a single species into two or more populations, reproductively isolated, but without any physical barrier separating them.
arxiv
Zoological Letters, 2015 Lake Tanganyika in the African Great Rift Valley is known as a site of adaptive radiation in cichlid fishes. Diverse herbivorous fishes coexist on a rocky littoral of the lake.
H. Hata +4 more
semanticscholar +1 more source
Parasite, 2014 Clinostomidae are digeneans characterized by a complex taxonomic history, continuously under revision based on both morphological and molecular analysis.
M. Caffara +7 more
semanticscholar +1 more source