acorn barnacle


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Related to acorn barnacle: Balanus balanoides

acorn barnacle

[′ā‚kȯrn ‚bär·nə·kəl]
(invertebrate zoology)
Any of the sessile barnacles that are enclosed in conical, flat-bottomed shells and attach to ships and near-shore rocks and piles.
References in periodicals archive ?
Within cirripedes, species of acorn barnacles (Thoracica: Balanomorpha) inhabiting rocky shores are an ecologically very important group that often completely dominate their habitat, and they are also among the most damaging foulers of man-made objects in the sea (Bertness et al.
Acorn barnacles are often the most numerous of all marine animals along rocky seashores.
Components of recruitment in populations of the acorn barnacle Semihalanus balanoides.
Pollicipes exhibited a contingent pattern of succession, which depended on the presence or absence of acorn barnacles (Fig.
Thus, our results suggest that interactions among high densities of acorn barnacle recruits are best thought of as a balance between positive and negative interactions.
The adhesive is comprised of a foam-like structure and mechanical properties (elastic modulus, hardness, and tensile stress) are lower than that of acorn barnacles with a calcareous base plate (Zheden et al.
Acorn barnacles are suspension feeders that extend three pairs of modified thoracic limbs (cirri) into ambient flow to capture plankton and smaller food particles (1).
Acorn barnacles provide an excellent opportunity for examining plastic response because they are sessile (and therefore cannot move in response to the environment), molt their exoskeleton (providing periodic opportunity for morphological change), and occur across a wide range of flow conditions.
The clawless crabs were provided with 6 ribbed mussels (3 in the 30-mm size class and 3 in the 40-mm size class), 3 scorched mussels (Brachidontes exustus), and 3 acorn barnacles for 48 h.
The scientists found a few specimens of non- native species, such as Japanese acorn barnacles and blue mussels, said Rumrill, who leads the state shellfish program.
I was looking at photographs of these really interesting underwater specimens, like acorn barnacles and other corals," he said before the show.