Results 101 to 110 of about 26,825 (204)

Black spots and female association preferences in a sexual/asexual mating complex ( Poecilia , Poeciliidae, Teleostei) [PDF]

open access: yes, 2018
We investigated whether female association preferences for males are influenced by black spot disease (BSD), a parasite induced change of the host phenotype.
Burmeister, Heike   +3 more
core  

Preference, tolerance and resistance responses of Poecilia sphenops Valenciennes, 1846 (Pisces: Poeciliidae) to thermal fluctuations Respuesta de preferencia, tolerancia y resistencia de Poecilia sphenops Valenciennes, 1846 (Pisces: Poeciliidae) a fluctuaciones térmicas

open access: yesLatin American Journal of Aquatic Research, 2010
Poecilia sphenops was acclimated to two thermal fluctuations, each following a symmetrical and asymmetrical cycle. The critical maximum temperatures of the fish were significantly different (P < 0.001) between the thermal fluctuations: 40°C for the 20-29°
Mónica Hernández-Rodríguez   +1 more
doaj  

Individuality in Fish Behavior: Ecology and Comparative Psychology [PDF]

open access: yes, 2002
This work is a brief review of a series of studies of the phenotypic organization and ecological significance of individual differences in fish behavior.
Budaev, Dr. Sergey, Zworykin, Dr. Dmitry
core  

Uso de la técnica de diafanización para el estudio del desarrollo óseo de Poecilia sphenops (Pisces: Cyprinodontiformes)

open access: yesManglar
Los estudios osteológicos en peces generalmente se han centrado en regiones específicas del esqueleto, sin considerar la descripción de todo el organismo, siendo la familia Poeciliidae muy poco estudiada; por el cual el objetivo del presente trabajo fue ...
Josue Emmanuel Rosas Campos   +2 more
doaj   +1 more source

Phenotypic and social effects on behavioural trade-offs in Eurasian perch [PDF]

open access: yes, 2012
Trading between conflicting demands is a fundamental part in how animals interact with its environment and social surrounding. Knowledge of what factors that are affecting behavioural decisions is central in our understanding of animal adaptation and ...
Hellström, Gustav
core  

Differential susceptibility to food stress in neonates of sexual and asexual mollies ( Poecilia , Poeciliidae) [PDF]

open access: yes, 2018
The maintenance of sex is still an evolutionary puzzle given its immediate costs. Stably coexisting complexes of asexually and sexually reproducing forms allow to study mechanisms that balance the costs and benefits of both asexual and sexual ...
Schlupp, Ingo, Tobler, Michael
core  

Vegetation Effects on Fish Distribution in Impounded Salt Marshes [PDF]

open access: yes, 2009
We compared the density and biomass of resident fish in vegetated and unvegetated flooded habitats of impounded salt marshes in the northern Indian River Lagoon (IRL) Estuary of east-central Florida.
Collazo, Jaime A.   +2 more
core  

Evaluación de niveles de guppy (Poecila reticulata) muerto en la ceba de Cachama Blanca (Piaractus Brachypomus)

open access: yesRevista de la Facultad de Ciencias Agropecuarias, 2015
El trabajo se realizó en la Estación Piscícola de la Granja Santo Domingo de la Universidad de la Amazonia, ubicada a 7km de la Ciudad de Florencia, teniendo como objetivo evaluar la sustitución de concentrado comercial por Guppy(Poecilia reticulata ...
H. E. Ocaña, S. M. Cruz, D. M. Parra
doaj  

Glycocalyx production in teleosts [Translation from: Verhandlungen der Deutschen Zoologischen Gesellschaft, p.286, 1970] [PDF]

open access: yes, 1978
Shielding the organism against harmful effects from the environment is one of the most important tasks of the outer covering of all animals. The epidermis of primarily aquatic organisms and the epithelia of organs which are exposed to water, such as the ...
Bereiter-Hahn, J., Schwerdtfeger, W. K.
core  

INFECÇÃO COM TROFOZOÍTOS DE Ichthyophthirius multifiliis (CILIOPHORA) EM Poecilia vivipara (POECILIIDAE) COMO HOSPEDEIRO EXPERIMENTAL INFECTION WITH TROPHOZOITES OF Ichthyophthirius multifiliis (CILIOPHORA) IN Poecilia vivipara (POECILIIDAE) AS AN EXPERIMENTAL HOST

open access: yesCiência Animal Brasileira, 2007
Este trabalho estudou o grau de parasitismo em Poecilia vivipara infectado experimentalmente com trofozoítos de Ichthyophthirius multifiliis. Em frascos de 400 mL de água com aeração constante foram acondicionados quatro peixes, com duas réplicas e ...
Alexander Camaras Berestinas   +7 more
doaj  

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