Results 101 to 110 of about 35,657 (246)

Longevity and Growth of the Crabs Callinectes sapidus and Callinectes rathbunae (Decapoda: Portunidae) in Paraíso Tabasco Mexico

open access: yesActa Zoologica, EarlyView.
ABSTRACT Individual growth models are important in fisheries of natural populations and can be incorporated in production models to estimate their maximum sustainable yield. Blue crab species, Callinectes sapidus and Callinectes rathbunae were obtained in the Mecoacán lagoon, Paraíso, Tabasco Mexico by “nasa” and “yahual” nets. Biometric values such as
Candelario Jiménez‐Olivares   +5 more
wiley   +1 more source

Contributions to the Knowledge of the Larval Morphology of Synalpheus Spence Bate, 1888 (Caridea: Alpheidae): Description of the First Zoea of S. antillensis Coutière, 1909 and S. cf. townsendi Coutière, 1909 Reared in Laboratory

open access: yesActa Zoologica, EarlyView.
ABSTRACT The first zoea of two Synalpheus species, namely: S. antillensis and S. cf. townsendi, are herein described. They were also compared with the genus descriptions and with their respective species complexes available in the literature. Morphological information on Synalpheus zoea I exhibits an increase from 19 to 21 species, and it corresponds ...
Rafael C. Santos, Rogerio C. Costa
wiley   +1 more source

Redescription of the First Zoeal Stage of Shrimp Cinetorhynchus rigens (Gordon, 1936) (Decapoda: Rhynchocinetidae) and New Perspectives Including Scanning Electron Microscopy

open access: yesActa Zoologica, EarlyView.
ABSTRACT Cinetorhynchus occur mainly in shallow waters of temperate to tropical regions. Among the 28 species of Rhynchocinetidae, there are only six with larval morphology known and the description of the larva of Cinetorhynchus rigens is succinct. Thus, we redescribe the zoea I of C.
Guilherme Carvalho Mendes   +2 more
wiley   +1 more source

Towards an ‘absolute’ timing of biostratigraphic and environmental phases from the Saalian late glacial to the Weichselian pleniglacial in central Europe—Insights from a lacustrine succession in Lichtenberg, northern Germany

open access: yesBoreas, EarlyView.
Palynological records are central to the biostratigraphic subdivision of the Late Pleistocene in central Europe. Yet many interglacial and interstadial phases—such as the Eemian, Brörup and Odderade—remain only poorly constrained in time due to limited numerical dating.
Michael Hein   +19 more
wiley   +1 more source

Collection and storage details of sea turtle carapace and skin samples.

open access: yes, 2016
Collection and storage details of sea turtle carapace and skin samples.
Roksana Majewska (756294)   +7 more
core   +1 more source

Growth parameters and age estimates of the mouthless crab, Cardisoma crassum Smith, 1870 (Brachyura: Gecarcinidae) from the Montijo Gulf, Pacific coast of Panama

open access: yesNauplius
The asymptotic carapace width (L ∞ ) and growth coefficient (k) parameters of the mouthless crab, Cardisoma crassum, were estimated, and the von Bertalanffy growth function was fitted to predict mean crab carapace width at different ages.
Roberto C. Lombardo
doaj   +1 more source

Unravelling the phylogeny of armadillos and their kin (Mammalia, Xenarthra, Cingulata) combining morphological, molecular, and stratigraphic data

open access: yesCladistics, EarlyView.
Abstract Cingulata, a major lineage of Xenarthra, comprises extinct and extant armoured placental mammals that diversified throughout the Cenozoic. Despite extensive study, phylogenetic hypotheses based on morphological and molecular data remain incongruent, and no total evidence analysis has been conducted. Here, we integrate the largest morphological
Daniel M. Casali   +7 more
wiley   +1 more source

A revised classification system of the marronoid clade of spiders (Araneae), based on dense sampling phylogenomics and comparative morphology

open access: yesCladistics, EarlyView.
Abstract The marronoid clade is a globally distributed, ecologically diverse group of spiders. It is an important faunal component in both natural and synanthropic environments, and even found in aquatic and extreme habitats such as desert salt flats. The systematics of the marronoid clade has been notoriously unstable due to the widespread character ...
Jonas O. Wolff   +10 more
wiley   +1 more source

Sea turtle hatchling carapace as a source of high quantity and quality DNA

open access: yes, 2016
Hatchling DNA provides valuable information on sea turtles. Samples can be obtained from dead hatchlings or embryo, or, when live animal samples are needed, from blood, flipper or carapace. We compared 120 DNA extractions from flipper and carapace tissue
González Garza, Blanca I.   +2 more
core  

3D Carapace Asymmetry in Tortoises: A Geometric Morphometric Analysis

open access: yes
Bilateral symmetry is a defining feature of the tortoise carapace; however, perfect symmetry is rarely achieved in biological systems. This study aimed to quantify bilateral carapace asymmetry in two tortoise species, the Leopard tortoise (Stigmochelys ...
Burak Ünal   +15 more
core   +1 more source

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