Results 11 to 20 of about 165 (141)

Cryptic diversity within two widespread diadromous freshwater fishes (Teleostei: Galaxiidae). [PDF]

Ecol Evol
Identification of taxonomically cryptic species is essential for the effective conservation of biodiversity. Freshwater‐limited organisms tend to be genetically isolated by drainage boundaries, and thus may be expected to show substantial cryptic ...
Jense C, Adams M, Raadik TA, Waters JM, Morgan DL, Barmuta LA, Hardie SA, Deagle BE, Burridge CP.   +8 more
europepmc   +3 more sources

Contrasting evolutionary responses in two co-distributed species of Galaxias (Pisces, Galaxiidae) in a river from the glaciated range in Southern Chile. [PDF]

R Soc Open Sci, 2020
Life-history traits are among the most important factors affecting population abundance and genetic diversity of species. Here, we analysed the genetic patterns of two Galaxias species with different life-history traits to investigate how these ...
Victoriano PF, Muñoz-Ramírez CP, Canales-Aguirre CB, Jara A, Vera-Escalona I, Burgos-Careaga T, Muñoz-Mendoza C, Habit EM.   +7 more
europepmc   +2 more sources

Chronic experimental hyperoxia elevates aerobic scope: a valid method to test for physiological oxygen limitations in fish. [PDF]

J Fish Biol, 2022
Abstract Experimental hyperoxia has been shown to enhance the maximum oxygen uptake capacity of fishes under acute conditions, potentially offering an avenue to test prominent physiological hypotheses attempting to explain impacts of climate warming on fish populations (e.g., gill‐oxygen limitation driving declines in fish size).
Skeeles MR, Scheuffele H, Clark TD.
europepmc   +2 more sources

Pathology associated with larval eustrongylides sp. (nematoda: Dioctophymatoidea) infection in galaxias maculatus (actinopterygii: Galaxiidae) from patagonia, Argentina. [PDF]

Int J Parasitol Parasites Wildl, 2019
Helminth infections within tissues tend to be subjected to a host response that can include encapsulation and melanization to isolate the parasite. The effectiveness of this response depends on the host species. During a survey of parasites of the native
Guagliardo S, Viozzi G, Brugni N.
europepmc   +2 more sources

Substrate size modifies stream grazer-biofilm interactions in the presence of invertivorous fish. [PDF]

Ecology, 2022
Abstract When herbivore abundance is controlled by predators there may be an indirect positive effect on primary producers due to reduced grazing pressure, but the potential of predation refuges to modify such trophic cascades has rarely been studied.
Albariño RJ, Closs GP, Matthaei CD, Townsend CR, Zamorano D.   +4 more
europepmc   +2 more sources

Assessing Patterns and Risk to Chilean Freshwater Fish Distributions Using Multi-Species Occupancy Models. [PDF]

Ecol Evol
To advance our understanding of freshwater biodiversity in data‐limited systems, this study used multispecies occupancy models to predict species richness and individual species occupancy, providing critical insights for the conservation of these rapidly declining ecosystems.
Tracy EE, Habit E, Górski K, Fangue NA, Rypel AL.   +4 more
europepmc   +2 more sources

The fossil vertebrate primary type specimens in the collection of the University of Otago Department of Geology. [PDF]

J R Soc N Z
ABSTRACT The 47 vertebrate type specimens held in the University of Otago Geology Department are catalogued in detail. A short history of the collection is followed by lists of the type specimens under the Classes Actinopterygii, Reptilia, Aves and Mammalia. A fish trace‐fossil is included at the end of the Actinopterygii.
Robinson JH, Lee DE, Richards MD, White SEM, Fordyce RE.   +4 more
europepmc   +2 more sources

Phylogeography in Galaxias maculatus (Jenyns, 1848) along Two Biogeographical Provinces in the Chilean Coast. [PDF]

PLoS One, 2015
Major geologic and climatic changes during the Quaternary exerted a major role in shaping past and contemporary distribution of genetic diversity and structure of aquatic organisms in southern South America.
González-Wevar CA, Salinas P, Hüne M, Segovia NI, Vargas-Chacoff L, Astorga M, Cañete JI, Poulin E.   +7 more
europepmc   +2 more sources

A Global Assessment of Parasite Diversity in Galaxiid Fishes

Diversity, 2021
Free-living species often receive greater conservation attention than the parasites they support, with parasite conservation often being hindered by a lack of parasite biodiversity knowledge.
Rachel A. Paterson, Gustavo P. Viozzi, Carlos A. Rauque, Verónica R. Flores, Robert Poulin   +4 more
doaj   +1 more source

Historical and Contemporary Diversity of Galaxiids in South America: Biogeographic and Phylogenetic Perspectives

Diversity, 2020
Galaxiid fishes from South America are represented by three genera (Aplochiton, Brachygalaxias and Galaxias) and eight species. Their genetic patterns have been studied over the last two decades to disentangle how historical and contemporary processes ...
Iván Vera-Escalona, M. Lisette Delgado, Evelyn Habit, Daniel E. Ruzzante   +3 more
doaj   +1 more source