Results 11 to 20 of about 10,030 (254)

Egg quality and parental ornamentation in the blue tit Parus caeruleus

Journal of Avian Biology, 2007
Components of avian egg quality often show remarkable variation between females and yet the causes of variation in this fitness‐related trait remain poorly understood. We investigated the egg size and yolk carotenoid investment of blue tit Parus caeruleus females in relation to multiple ...
Beáta Szigeti, János Török, Gergely Hegyi, Balázs Rosivall, Rita Hargitai, Eszter Szõllõsi, Gábor Michl   +6 more
openaire   +3 more sources

Female Preference and the Maintenance of Male Fin Ornamentation in Three Egg-Mimic Darters (Pisces: Percidae) [PDF]

Journal of Freshwater Ecology, 2001
ABSTRACT Egg-mimic, or lollypop darters comprise four species in which breeding males develop large knobs supported by attenuated rays above the second dorsal fin. These structures are presumably the product of sexual selection via female mate choice behavior.
Rex Meade Strange
openaire   +3 more sources

Ultrastructural studies of the morphological variations of the egg surface and envelopes of the African catfish Clarias gariepinus (Burchell, 1822) before and after fertilisation with a discussion of fertilisation mechanism

Scientia Marina, 2006
Much of the existing knowledge of the mechanisms involved in teleost fertilisation is based on a few small model species that have no commercial value. Research is therefore urgently required to address mechanisms involved in fertilisation in species of ...
Imam A. A. Mekkawy, Alaa G. M. Osman
doaj   +1 more source

Rough backs: taxonomic value of epicuticular sculpturing in the genus Milnesium Doyère, 1840 (Tardigrada: Apochela)

Scientific Reports, 2022
The phylum Tardigrada comprises ~ 1400 described species that inhabit a wide range of ecosystems throughout the globe. Tardigrades are generally considered taxonomically challenging due to a strongly limited number of taxonomically informative ...
Witold Morek, Karol Wałach, Łukasz Michalczyk   +2 more
doaj   +1 more source

Morphological types and seasonal variation in eggs of zooplankton species from bottom sediments in Bahia Blanca Estuary, Argentina [PDF]

, 2006
Resting egg production is a survival mechanism in zooplankton species against adverse environmental conditions. Egg accumulation in the upper layer of the bottom sediments is fundamental to the resurgence of the populations of these species when ...
Berasategui, Anabela Anhi, Diodato, Soledad Lorena, Hoffmeyer, Monica Susana   +2 more
core   +3 more sources

Egg spottiness reflects female condition, physiological stress, and ornament expression in a common rallid species

The Auk, 2020
Lay Summary• There is equivocal support for direct associations between maternal quality and deposition of protoporphyrin pigmentation (dark spots and blotches) in avian eggshells.• Research on protoporphyrin eggshell pigmentation has primarily focused on a single avian order (Passeriformes).• We examined associations of protoporphyrin-based eggshell ...
Piotr Minias, Jesús Gómez, Radosław Włodarczyk   +2 more
openaire   +1 more source

Seroprevalence and Microbiological Monitoring in Eggs for Salmonella enterica Serovar Enteritidis and Salmonella enterica Serovar Typhimurium in Ornamental Chicken Flocks in Italy [PDF]

The Pakistan Veterinary Journal, 2021
Few data are available about the prevalence of Salmonella enterica serovar Enteritidis (S.E.) and Salmonella enterica serovar Typhimurium (S.T.) in ornamental poultry in Italy. The aim of this study was to investigate the seroprevalence for S.E. and S.T. using serological tests and the prevalence of Salmonella spp. in eggs by culture methods.
A Guerrini, G Mescolini, P Roncada, G Tosi, E Raffini, M Frasnelli   +5 more
openaire   +2 more sources

Parasitic copepods from Egyptian Red Sea fishes: Bomolochidae Claus, 1875 [PDF]

, 2016
© The Author(s) 2015 Open Access - This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in
A Brian, BB Collette, C-L Lin, CB Wilson, CB Wilson, Geoffrey Allan Boxshall, Hoda Hassan El-Rashidy, J-S Ho, J-S Ho, J-S Ho, NK Pillai, NK Pillai, R Bere, RF Cressey, RF Cressey, RF Cressey, S Yamaguti, W Vervoort, W Vervoort, WH Leigh-Sharpe   +19 more
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Two new species of the Macrobiotus hufelandi complex (Tardigrada: Eutardigrada: Macrobiotidae) from Australia and India, with notes on their phylogenetic position

European Journal of Taxonomy, 2019
In this paper we describe two new tardigrade species belonging to the Macrobiotus hufelandi complex: Macrobiotus noongaris sp. nov. from Perth, Australia, and Macrobiotus kamilae sp. nov. from Mussoorie, India.
Kyle Coughlan, Daniel Stec
doaj   +1 more source

Integrative description of Macrobiotus canaricus sp. nov. with notes on M. recens (Eutardigrada : Macrobiotidae) [PDF]

, 2018
In this paper we describe Macrobiotus canaricus sp. nov., a new tardigrade species of the Macrobiotus hufelandi group from the Canary Islands. Moreover, with the use of DNA sequencing, we confirm that Macrobiotus recens Cuénot, 1932 represents the ...
Krzywański, Łukasz, Michalczyk, Łukasz, Stec, Daniel   +2 more
core   +1 more source