Results 41 to 50 of about 1,274 (170)

Molecular identification of Sarcocystis halieti in the muscles of two species of birds of prey from Spain

open access: yesParasites & Vectors, 2021
Background Members of the genus Sarcocystis are protozoan parasites characterized by a prey–predator two-host life-cycle. Sarcocysts are formed in the muscles or central nervous system of the intermediate host (IH), while sporocysts develop in the small ...
Petras Prakas   +6 more
doaj   +1 more source

Th e Relationship Between Fish Length and Otolith Size and Weight of the Australian Ancnovy, En-graulis australis (Clupeiformes, Engraulidae), Retrieved from the Food of the Australasian Gannet, Morus serrator (Suliformes, Sulidae), Hauraki Gulf, New Zealand

open access: yesZoodiversity, 2021
Relationships between fish length and otolith length, width and mass were examined in the Australian anchovy Engraulis australis (White, 1790) recovered from the food of Gannet examined from colonies at islands of Horuhoru Rock and Mahuki Islands in the Hauraki Gulf, New Zealand. The relationships between otolith length- fish total length (TL), otolith-
L. A. Jawad, N. J. Adams
openaire   +2 more sources

Estimating egg mass-body mass relationships in birds [PDF]

open access: yes, 2020
The mass of a bird’s egg is a critical attribute of the species’ life history and represents a fundamental component of reproductive effort. Indeed, the tradeoff between the number of eggs in a clutch and clutch mass lies at the heart of understanding ...
Balasubramaniam, Priya   +1 more
core  

Birds and hard ticks (Acari: Ixodidae), with discussions about hypotheses on tick evolution [PDF]

open access: yes, 2017
The relationship between birds (Aves) and hard ticks (Ixodidae) was analyzed for the 386 of 721 tick extant species whose larva, nymph and adults are known as well as their natural hosts.
Guglielmone, Alberto, Nava, Santiago
core   +3 more sources

Biodiversitas Burung Air di Kawasan Mangrove di Sekitar Muara Sungai Lakawali dan Sungai Ussu Kecamatan Malili, Kabupaten Luwu Timur, Sulawesi Selatan: Biodiversity of Water Birds in the Mangrove Area Around the Estuaries of the Lakawali River and Ussu River, Malili District, East Luwu Regency, South Sulawesi [PDF]

open access: yes, 2023
Water bird diversity in mangrove ecosystem of the Malili District, East Luwu Regency, South Sulawesi, is rarely studied. This reseacrh aims to examine the diversity of bird species in the mangrove ecosystem, Malili District, East Luwu Regency, South ...
Ahmad, Sitti Wirdhana   +5 more
core   +2 more sources

The complete mitochondrial genome of Pelecanus occidentalis (Pelecaniformes: Pelecanidae) and its phylogenetic analysis

open access: yesMitochondrial DNA. Part B. Resources, 2018
Pelecanus occidentalis, in the order Pelecaniformes, is one of the most abundant and widespread waterbird species in the coast of America. However, the phylogenetic relationships among Pelecaniformes, Suliformes, and Ciconiiformes remain unresolved ...
Tian Huang   +3 more
doaj   +1 more source

Clade‐wide morphological and functional variation of the sauropsid columella

open access: yesThe Anatomical Record, EarlyView.
Abstract The columella (=stapes) is the middle ear bone of reptiles that transmits vibrations from the environment to the inner ear. It has been shown to exhibit extensive interspecific morphological disparity in several clades; however, its morphological variation and associated functional consequences remain poorly described.
John Peacock   +4 more
wiley   +1 more source

Genetic structure in the European endemic seabird, Phalacrocorax aristotelis, shaped by a complex interaction of historical and contemporary, physical and nonphysical drivers [PDF]

open access: yes, 2016
Geographically separated populations tend to be less connected by gene flow, as a result of physical or non-physical barriers preventing dispersal, and this can lead to genetic structure.
Cavers, Stephen   +6 more
core   +2 more sources

Rio Juruá: site 29 of Price’s expedition, and the first record of a Sebecidae (Notosuchia) for the Brazilian Solimões Formation [PDF]

open access: yesAnais da Academia Brasileira de Ciências
The Solimões Formation is one of the most fossiliferous units of the Neogene to Pleistocene of South America. Its rocks represent fluvial lacustrine Paleo-Amazon environments providing a rich record of paleovertebrate remains, including fishes (e.g ...
ANDRÉ E. PIACENTINI PINHEIRO   +4 more
doaj   +1 more source

The influence of rivers on seabird foraging ecology

open access: yesBiological Reviews, EarlyView.
ABSTRACT Rivers act as vital arteries to the world's oceans, delivering fresh water and nutrients that sustain marine ecosystems. Globally, river flow increasingly is being altered by climate change and anthropogenic pressures; yet the significance of rivers to predatory marine species, such as seabirds, and the extent to which river‐related changes ...
Julia B. Morais   +2 more
wiley   +1 more source

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