Results 41 to 50 of about 15,357 (229)

Insights Into the Feeding Ecology of Young‐of‐the‐Year Bigeye Tuna (Thunnus obesus) in the Southwestern Atlantic Ocean

open access: yesFisheries Oceanography, EarlyView.
ABSTRACT Bigeye tuna (Thunnus obesus) is among the most prized tuna species sustaining fisheries worldwide. However, information on the feeding habits for the species is mostly restricted to the size range harvested by commercial fisheries. In this study, we report the diet composition of juvenile bigeye tuna schooling near the surface at night in the ...
Juliano Lauser Coletto   +5 more
wiley   +1 more source

Records of Copiatestes filiferus (Leukart, in Sars, 1885) Gibson and Bray, 1977 (Digenea) and Gorgorhynchus sp. (Acanthocepahala) of marine fish from peruvian coast

open access: yesRevista Peruana de Biología, 2013
In this paper, Copiatestes filiferus (Leukart, in Sars, 1885) Gibson and Bray, 1977 (Digenea) and Gorgorhynchus sp. (Acanthocephala) parasites of Hemilutjanus macrophthalmos (Teleostei), both parasites are new records from Peru and the fish is a new host.
Manuel Tantaleán V, Marianne Lefevre
doaj   +1 more source

Two new species of stone loaches of the genus Barbatula (Cypriniformes: Nemacheilidae) from Europe with a neotype designation of B. barbatula (Teleostei: Nemacheilidae)

open access: yesJournal of Fish Biology, EarlyView.
Abstract Ten species of Barbatula are recognised in Europe, west of the Urals: B. barbatula, B. caucasica, B. hispanica, B. leoparda, B. pironae, B. quignardi, B. sturanyi, B. taurica, B. vardarensis and B. zetensis, with B. caucasica and B. taurica formerly considered subspecies of B. barbatula.
Bárbara B. Calegari   +6 more
wiley   +1 more source

Annual growth of brown trout in alpine lakes is highly influenced by spring snow depth and ice-out day

open access: yesFauna Norvegica, 2023
Growth of annular zones in otoliths of brown trout from the alpine lakes Litlosvatn and Kollsvatn on western part of the Hardangervidda mountain plateau have been studied during the period 2004–2021, concurrent with recordings of accumulated snow in ...
Reidar Borgstrøm
doaj  

Increased precision of growth data gained by reading multiple scales from each individual of Atlantic salmon (Salmo salar)

open access: yesFauna Norvegica, 2016
The precision of growth estimates based on fish scales often remains uncertain because of withinindividual variation in scale size and scale patterns, and also due to measurement errors.
Tormod Haraldstad   +3 more
doaj   +1 more source

Almost billfish: convergent longirostry, micro‐dentition, and possible glandular sinuses in a large teleost fish from the Upper Cretaceous of Northern Italy

open access: yesJournal of Anatomy, EarlyView.
A fossil rostrum fragment of a large teleost fish from the Upper Cretaceous of Northern Italy reveals remarkable anatomical convergences with Cenozoic and Recent billfishes (marlins, swordfishes, and akin). The extinct group Plethodidae independently acquired a long snout, micro‐teeth, and oil‐gland sinuses well before the evolution of true billfishes.
Giovanni Serafini   +5 more
wiley   +1 more source

Atlas of marine bony fish otoliths (Sagittae) of Southeastern - Southern Brazil Part I: Gadiformes (Macrouridae, Moridae, Bregmacerotidae, Phycidae and Merlucciidae); Part II: Perciformes (Carangidae, Sciaenidae, Scombridae and Serranidae)

open access: yesBrazilian Journal of Oceanography, 2014
The drawings, detailed pictures, precise descriptions and measurements that characterize otoliths must be made available for studies in various areas, including taxonomy, phylogeny, ecology, fisheries, paleontology, diversity, predator-prey relationships
Carmen Lucia Del Bianco Rossi-Wongtschowski   +5 more
doaj   +1 more source

An isothermal workflow for low‐cost and PCR‐free field‐based community metabarcoding

open access: yesMethods in Ecology and Evolution, Volume 16, Issue 7, Page 1413-1424, July 2025.
Abstract DNA metabarcoding has revolutionized our ability to monitor ecosystems. However, the method is still rarely used in developing countries where resources are limited and fieldwork is challenging. To overcome this limitation, we designed a comprehensive workflow allowing rapid community metabarcoding with minimum, self‐manufacturable equipment ...
Amadeus Plewnia   +2 more
wiley   +1 more source

Cottus gobio (Linnaeus, 1758), a new fish-species in Nord-Trøndelag County, Norway

open access: yesFauna Norvegica, 2010
Frilund GE, Koksvik J, Rikstad A and Berger HM. 20092009. Cottus gobio (Linnaeus, 1758), a new fish-species in Nord-Trøndelag County, Norway. Fauna Norvegica 29: 55-60.
Gunn E. Frilund   +3 more
doaj   +1 more source

Otolith‐based species identification in the killifish Aphaniops (Teleostei; Cyprinodontiformes; Aphaniidae) using both morphometry and wavelet analysis

open access: yesActa Zoologica, Volume 106, Issue 3, Page 291-308, July 2025.
Abstract The killifish genus Aphaniops consists of nine species distributed in Eastern Africa and the Middle East. However, distinguishing these species from each other based on morphological traits is challenging. Here we investigate the utility of otoliths (sagittae) in distinguishing between A. dispar, A. ginaonis, A. hormuzensis, A.
Eleni A. Charmpila   +2 more
wiley   +1 more source

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