Results 31 to 40 of about 39,651 (306)

Crater lake cichlids individually specialize along the benthic-limnetic axis [PDF]

open access: yes, 2014
A common pattern of adaptive diversification in freshwater fishes is the repeated evolution of elongated open water (limnetic) species and high-bodied shore (benthic) species from generalist ancestors.
Barlow G. W.   +14 more
core   +2 more sources

Drivers of parasite sharing among Neotropical freshwater fishes [PDF]

open access: yesJournal of Animal Ecology, 2014
SummaryBecause host–parasite interactions are so ubiquitous, it is of primary interest for ecologists to understand the factors that generate, maintain and constrain these associations. Phylogenetic comparative studies have found abundant evidence for host‐switching to relatively unrelated hosts, sometimes related to diversification events, in a ...
Mariana P. Braga   +2 more
openaire   +2 more sources

Swimming performance of the small characin Bryconamericus stramineus (Characiformes: Characidae)

open access: yesZoologia (Curitiba), 2010
Very little research has been conducted on the swimming capacity of Neotropical fish. The few studies available have focused on large migratory species.
Miriam A. de Castro   +3 more
doaj   +1 more source

Biology and Physiology of Freshwater Neotropical Fish

open access: yes, 2020
Biology and Physiology of Freshwater Neotropical Fish is the all-inclusive guide to fish species prevalent in the neotropical realm. It provides the most updated systematics, classification, anatomical, behavioral, genetic, and functioning systems information on freshwater neotropical fish species.
Baldisserotto, Bernardo   +2 more
openaire   +2 more sources

C-banding, fluorescent staining and NOR location in holokinetic chromosomes of bugs of the Neotropical genus Antiteuchus (Heteroptera: Pentatomidae: Discocephalinae) [PDF]

open access: yes, 2006
Different cytogenetic techniques including C-banding, base-specific fluorochromes and silver nitrate staining were used to compare the karyotypes of three species of bugs, representatives of the Neotropical genus Antiteuchus, namely A.
de Souza, Maria José, Lanzone, Cecilia
core   +1 more source

The response of neotropical dragonflies (Insecta: Odonata) to local and regional abiotic factors in small streams of the Amazon [PDF]

open access: yes, 2019
Since the relative role of local and regional abiotic factors on the Odonata diversity in rainforest streams is still poorly understood, we evaluated the effects of these factors on adult Odonata (Insecta) from preserved and altered streams in the ...
Belle   +20 more
core   +1 more source

Optimal swim speeds by respirometer: an analysis of three neotropical species

open access: yesNeotropical Ichthyology
The swimming ability of neotropical fish species is an important aspect for fish ladder designs. Especially in Latin America, where fish ladders are highly selective, fish strategies to negotiate the passage should be studied focusing on target species ...
Hersília de Andrade e Santos   +3 more
doaj   +1 more source

Phylogenetic analysis of microbial communities in different regions of the gastrointestinal tract in Panaque nigrolineatus, a wood-eating fish [PDF]

open access: yes, 2012
The Neotropical detritivorous catfish Panaque nigrolineatus imbibes large quantities of wood as part of its diet. Due to the interest in cellulose, hemi-cellulose and lignin degradation pathways, this organism provides an interesting model system for the
McDonald, R., Schreier, H., Watts, Joy
core   +3 more sources

Whole Black Soldier Fly Larvae (Hermetia illucens) as Dietary Replacement of Extruded Feed for Tambaqui (Colossoma macropomum) Juveniles

open access: yesAquaculture Journal, 2022
The black soldier fly (BSF, Hermetia illucens) is a prominent insect species and a novel alternative ingredient for aquafeeds. This study aimed to evaluate the replacement of commercial feed with fresh whole black soldier fly larvae (BSFL) for Colossoma ...
Betselene M. Ordoñez   +9 more
doaj   +1 more source

Revision of Bryconamericus (Characiformes, Characidae) from Pacific coastal and Amazon River drainages with descriptions of three new species

open access: yesRevista de Investigaciones Universidad del Quindío, 2023
We report the results of a taxonomic revision of the species of Bryconamericus from the Amazon River Basin of Peru, Ecuador, Bolivia and the Pacific coastal rivers of Peru.
Cesar Román-Valencia   +2 more
doaj   +1 more source

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