Results 81 to 90 of about 3,383 (189)

Estructura trófica de la asociación de peces intermareales de la costa rocosa del norte de Chile

open access: yesRevista de Biología Tropical, 2004
Se analizaron las interacciones tróficas de 13 especies de peces intermareales, recolectadas en la región norte de Chile (20°18’S y 20°54’S) durante el período julio 1997 a julio 1998, a partir del contenido estomacal de 820 especímenes.
C. Viviana Berrios, F. Mauricio Vargas
doaj  

Spatially structured genetic variation in a broadcast spawning bivalve: quantitative vs. molecular traits [PDF]

open access: yes, 2003
Understanding the origin, maintenance and significance of phenotypic variation is one of the central issues in evolutionary biology. An ongoing discussion focuses on the relative roles of isolation and selection as being at the heart of genetically based
Delden, W. van,   +3 more
core   +3 more sources

Epibiosis and masking material in the spider crab Maja squinado (Decapoda: Majidae) in the Ría de Arousa (Galicia, NW Spain) [PDF]

open access: yes, 1997
[Abstract] Majid crabs present a marked masking behaviour, which, in addition to the phenomenon of epibiosis on their exoskeleton, constitutes a complex camouflage system to ward off predators.
Fernández, Luis   +3 more
core   +1 more source

An improved non-invasive method for measuring heartbeat of intertidal animals [PDF]

open access: yes, 2013
Since its emergence two decades ago, the use of infrared technology for noninvasively measuring the heartbeat rates of invertebrates has provided valuable insight into the physiology and ecology of intertidal organisms.
Burnett, NP   +9 more
core   +1 more source

Intertidal zonation among congeners: factors regulating distribution of porcelain crabs Petrolisthes spp. (Anomura. Porcellanidae)

open access: yesMarine Ecology Progress Series, 1991
The porcelain crabs Petrol~sthes cinctipes (Randall) and P. eriomerus Stimpson are sympatric on exposed rocky shores in the northeastern Pacific These species often exhibit a striking pattern of non-overlapping vert~cal distributions, wlth P. eriomerus inhabiting low Intertidal and subtidal areas and P. cinctipes occurring in the middle and high intert~
GC Jensen, DA Armstrong
openaire   +1 more source

Does Petrolisthes armatus (Anomura, Porcellanidae) form a Species Complex or Are We Dealing with Just One Widely Distributed Species? [PDF]

open access: yes
Fernando L. Mantelatto, Leonardo G. Pileggi, Ivana Miranda, and Ingo S. Wehrtmann (2011) Does Petrolisthes armatus (Anomura, Porcellanidae) form a species complex or are we dealing with just one widely distributed species?
MANTELATTO, Fernando L.   +3 more
core  

Occurrence and mechanisms of ontogenetic changes in body colour lightness in intertidal marine invertebrates [PDF]

open access: yes, 2013
Ontogenetic changes in body colouration are known to occur in some benthic marine invertebrates and have been associated with ecological shifts in diet and physiological tolerance.

core  

Substrate preference by the porcelain crab Pachycheles monilifer (Crustacea, Anomura): the bryozoan Schizoporella errata or the polychaete Phragmatopoma caudata?

open access: yesNauplius
Differences on reproductive performance between two sampling points of the porcelain crab Pachycheles monilifer from Ubatuba (São Paulo, Brazil), one from Itaguá Beach (living on Schizoporella errata) and the other from Grande Beach (living on ...
Ana Francisca Tamburus   +4 more
doaj  

The construction and evaluation of a word pronunciation test for grades four, five, and six [PDF]

open access: yes, 1955
Thesis (Ed.M.)--Boston ...
Chapman, Mary T   +4 more
core   +1 more source

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