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Prey Choice of Intertidally Foraging Water Birds
(Friday Harbor Laboratories, 2014-06)
The foraging behaviors and prey choice of intertidally foraging birds is largely
undocumented. A series of four observations on prey choice was done at a discrete site during low tidal heights (<.0.61 m) and high tidal heights (>1.52m). Prey was defined as three distinct categories, “Fish”, “Crustacean”, and “Other”. There ...
Prey Choice of Intertidally Foraging Water Birds
(Friday Harbor Laboratories, 2014-06)
The foraging behaviors and prey choice of intertidally foraging birds is largely undocumented. A series of four observations on prey choice was done at a discrete site during low tidal heights (<.0.61 m) and high tidal heights (>1.52m). Prey was defined as three distinct categories, “Fish”, “Crustacean”, and “Other”. There ...
Attachment forces and the role of suction in the sea anemone Metridium farcimen
(Friday Harbor Laboratories, 2014-06)
This paper looks at the forces involved in the attachment of M. farcimen to substrate. Many sessile and transitory, aquatic animals rely on the secretion of an adhesive glue for attachment to substrate, like most sea anemones. However, other attachment mechanisms exist. For example, limpets and clingfish rely on suction. The ...
Characteristics of the Habitat of the Northern Clingfish
(Friday Harbor Laboratories, 2014-08-30)
The Northern Clingfish, Gobiesox maeandricus, has many well-studied morphological
adaptations to help it cope with the harsh environment that it lives in: the intertidal zone.
Lab studies have shown that this fish can adhere to smooth and rough surfaces as well as
slippery and non-slippery surfaces. Now, the aim of the ...
Comparison of drag forces acting on different benthic body shapes in marine molluscs
(Friday Harbor Laboratories, 2014-06)
The marine intertidal is an area prone to high wave energy and flow velocities,
and the organisms living there are subjected to large hydrodynamic forces, such as drag.
These forces acting to dislodge organisms may result in reduced foraging efficiency and
depressed overall growth. In this study the body shape of a snail, ...
Bite and Suction Forces of the Adductor Muscle in Four Sculpin Species
(Friday Harbor Laboratories, 2014-06)
To prevent constant competition across species, different species may develop different
morphologies to increase their ability to attain a certain food source within a niche. By
dissecting the adductor muscle and taking measurements in four sculpin species we can
begin to assess how their feeding styles and niches influence ...
Comparative Functional Anatomy of the Oral Jaw Musculo-skeletal System in Pacific Salmons
(Friday Harbor Laboratories, 2014-06)
Food acquisition is a necessary component of survival for any organism and in order to feed effectively, a predator must meet the mechanical demands of its prey. This study’s focus was to make general observations and conclusions about the evolution and adaptation of several morphological traits of pacific salmon jaws based ...
Suction as a Mechanism of Attachment in Chitons
(Friday Harbor Laboratories, 2014-06)
Chitons, like other mollusks, rely upon a variety of adhesive forces to combat factors
such as wave action and predation in the intertidal. In this study, we explore what effect
suction has upon a chiton’s total force of attachment and tenacity, as well the impact of
substrate roughness. In this experiment, we found that ...
The impact of contaminated pilings on nudibranchs at the docks of Friday Harbor
(Friday Harbor Laboratories, 2014-06)
Docks in the Friday Harbor Island have been observed to have many nudibranchs present on them. One hypothesis for this is the creosote, a chemical used to help preserve the wood from wear, is attracting them to the pilings. Creosote has been shown to have negative effects on the environment, and because nudibranchs’ rinophores ...
Metridium farcimen show little to no preference for prey particle size
(Friday Harbor Laboratories, 2014-06)
The overabundance of one species in a particular area is typically bolstered by a biotic or
abiotic factor that allows them to outcompete other species for space and resources. The
undersides of the docks in the town of Friday Harbor and at the Friday Harbor
Laboratories are overrun with white plumose anemones, Metridium ...