Biological Synopsis of the Asian Shore Crab, Hemigrapsus
... northern Adriatic Sea. The species is not yet found in eastern Canada, but its potential distribution may include the Bay of Fundy and southern Nova Scotia. Natural dispersal is by planktonic larvae and benthic adults and juveniles. Shipping vectors have been implicated in anthropogenic dispersal. L ...
... northern Adriatic Sea. The species is not yet found in eastern Canada, but its potential distribution may include the Bay of Fundy and southern Nova Scotia. Natural dispersal is by planktonic larvae and benthic adults and juveniles. Shipping vectors have been implicated in anthropogenic dispersal. L ...
The Ecological Role of a
... Cobble Habitats By contrast with intertidal rocky benches, intertidal cobble fields are understudied, yet contain their own unique species assemblages and ecological patterns and underlying processes. Early testing within boulder fields led to the intermediate disturbance hypothesis, which states th ...
... Cobble Habitats By contrast with intertidal rocky benches, intertidal cobble fields are understudied, yet contain their own unique species assemblages and ecological patterns and underlying processes. Early testing within boulder fields led to the intermediate disturbance hypothesis, which states th ...
Trial farming the akoya pearl oyster, Pinctada imbricata
... The akoya pearl oyster, Pinctada imbricata has been fished for pearls for centuries and is amongst the widest spread of the pearl oyster species. Akoya oysters are found on areas of the eastern coastline of North and South America, the east coast of Africa, the Mediterranean, as well as throughout t ...
... The akoya pearl oyster, Pinctada imbricata has been fished for pearls for centuries and is amongst the widest spread of the pearl oyster species. Akoya oysters are found on areas of the eastern coastline of North and South America, the east coast of Africa, the Mediterranean, as well as throughout t ...
Differences in feeding adaptations in intertidal and
... in the context of range boundaries, but on a much smaller spatial scale. At high tide, intertidal organisms experience many of the same conditions that subtidal organisms do, as the two groups are often only meters apart, and a wellestablished gradient of stressors exists as one moves from the subti ...
... in the context of range boundaries, but on a much smaller spatial scale. At high tide, intertidal organisms experience many of the same conditions that subtidal organisms do, as the two groups are often only meters apart, and a wellestablished gradient of stressors exists as one moves from the subti ...
Document
... systems (e.g. Warming 1909; Elton 1927; Allee 1932; Allee et al. 1949). Only at a very much later stage ecology turned to intertidal systems (e.g. Connell 1961; Paine 1966; 1974). Odum & Hoskin (1958) analysed estuarine habitats at the American coast and used the holistic approach for ecosystems whi ...
... systems (e.g. Warming 1909; Elton 1927; Allee 1932; Allee et al. 1949). Only at a very much later stage ecology turned to intertidal systems (e.g. Connell 1961; Paine 1966; 1974). Odum & Hoskin (1958) analysed estuarine habitats at the American coast and used the holistic approach for ecosystems whi ...
Horse mussel beds (UK BAP Priority Habitat description)
... There have been no studies of the recovery of damaged beds but full recovery after severe damage would undoubtedly take many years at best and may not occur at all. Some beds may be self maintaining relict features. The byssus threads secreted by M. modiolus have an important stabilising effect on t ...
... There have been no studies of the recovery of damaged beds but full recovery after severe damage would undoubtedly take many years at best and may not occur at all. Some beds may be self maintaining relict features. The byssus threads secreted by M. modiolus have an important stabilising effect on t ...
Horse Mussel Beds
... There have been no studies of the recovery of damaged beds but full recovery after severe damage would undoubtedly take many years at best and may not occur at all. Some beds may be self maintaining relict features. The byssus threads secreted by M. modiolus have an important stabilising effect on t ...
... There have been no studies of the recovery of damaged beds but full recovery after severe damage would undoubtedly take many years at best and may not occur at all. Some beds may be self maintaining relict features. The byssus threads secreted by M. modiolus have an important stabilising effect on t ...
Potential Impacts of a Western Pacific Grapsid Crab on Intertidal
... fragments of green, brown, and red seaweeds, and fragments of mollusc shell. Although these fragments were too small to be identified to species, they confirmed the use of varied food sources by the crabs in their natural habitat. Discussion Population characteristics of Hemigrapsus sanguineus in Lo ...
... fragments of green, brown, and red seaweeds, and fragments of mollusc shell. Although these fragments were too small to be identified to species, they confirmed the use of varied food sources by the crabs in their natural habitat. Discussion Population characteristics of Hemigrapsus sanguineus in Lo ...
The Intertidal Zone - Malibu High School
... extent, the sun. There are coastlines characterized by only one high and one low tide per lunar day of 24.8 hours. This type of a tide is a diurnal tide, or daily tide. Other coasts experience two high tides and two low tides per lunar day and this tidal pattern is known as a semidiurnal tide, or se ...
... extent, the sun. There are coastlines characterized by only one high and one low tide per lunar day of 24.8 hours. This type of a tide is a diurnal tide, or daily tide. Other coasts experience two high tides and two low tides per lunar day and this tidal pattern is known as a semidiurnal tide, or se ...
KATARINA OGANJAN Distribution, feeding and
... Three types of environmental gradients are recognised as major forces in structuring sessile communities during and after settlement: direct gradients, indirect gradients and resources (Austin, 1980). Direct environmental gradients have a physiological influence on species but are not consumed, e.g. ...
... Three types of environmental gradients are recognised as major forces in structuring sessile communities during and after settlement: direct gradients, indirect gradients and resources (Austin, 1980). Direct environmental gradients have a physiological influence on species but are not consumed, e.g. ...
Introduction - College of Science
... two claws of differing morphology: a slender cutter claw and a larger crusher claw ...
... two claws of differing morphology: a slender cutter claw and a larger crusher claw ...
Detection of alternative stable states in marine communities
... the phrase ‘‘in a given habitat’’ (Lewontin, 1969). Each unique set of parameter values are defined by a single environment or habitat. Lewontin (1969) noted that there may be small scale variation of parameter values such that individuals will experience both spatial and temporal variation (also se ...
... the phrase ‘‘in a given habitat’’ (Lewontin, 1969). Each unique set of parameter values are defined by a single environment or habitat. Lewontin (1969) noted that there may be small scale variation of parameter values such that individuals will experience both spatial and temporal variation (also se ...
Restoration of intertidal flats and tidal salt marshes
... irregularly inundated areas of salt marsh higher up. In tropical areas, and even some benign temperate areas such as northernmost New Zealand, the upper parts of intertidal areas may be covered by mangrove forests rather than salt marsh. Such mangroves have the tendency also to cover the regularly i ...
... irregularly inundated areas of salt marsh higher up. In tropical areas, and even some benign temperate areas such as northernmost New Zealand, the upper parts of intertidal areas may be covered by mangrove forests rather than salt marsh. Such mangroves have the tendency also to cover the regularly i ...
LOCAL DISTURBANCE CYCLES AND THE MAINTENANCE OF
... iterations and then plotted these extremes in relation to fecundity. This analysis was conducted for both a single closed population and all metapopulations. Landscape time series analysis.—For all metapopulation simulations, the minimum and maximum landscape cover along the metapopulation transect ...
... iterations and then plotted these extremes in relation to fecundity. This analysis was conducted for both a single closed population and all metapopulations. Landscape time series analysis.—For all metapopulation simulations, the minimum and maximum landscape cover along the metapopulation transect ...
spatial variation in molluscan assemblages from coralline turfs of
... sieve. All molluscs retained on the 500 mm sieve were sorted and identified using a binocular microscope (12 magnification). Although there are other taxa associated with these mat-like habitats, molluscan assemblages were the main focus because they are numerically-dominant, encompass important func ...
... sieve. All molluscs retained on the 500 mm sieve were sorted and identified using a binocular microscope (12 magnification). Although there are other taxa associated with these mat-like habitats, molluscan assemblages were the main focus because they are numerically-dominant, encompass important func ...
Effect of intra-and interspecific interactions on the feeding behavior
... of intra- and interspecific interactions on the size selection of mussels in 1996 and 1998 by quantifying the number of small, medium-sized and large mussels consumed by sea stars of both species in 6 treatments: (1) 1 Leptasterias polaris, (2) 1 Asterias vulgaris, (3) 6 L. polaris, (4) 6 A. vulgari ...
... of intra- and interspecific interactions on the size selection of mussels in 1996 and 1998 by quantifying the number of small, medium-sized and large mussels consumed by sea stars of both species in 6 treatments: (1) 1 Leptasterias polaris, (2) 1 Asterias vulgaris, (3) 6 L. polaris, (4) 6 A. vulgari ...
Crassostrea gigas - Pacific oyster UK NON
... European reports (Wadden Sea). Pacific oysters are consumed by a variety of marine animals such as Asteroid echinoderms, boring gastropods, boring bivalves, spionid polychaetes, Carcinus maenas in the intertidal, benthic feeding fish, lobsters in the subtidal zone, black ducks, eider ducks, and wadi ...
... European reports (Wadden Sea). Pacific oysters are consumed by a variety of marine animals such as Asteroid echinoderms, boring gastropods, boring bivalves, spionid polychaetes, Carcinus maenas in the intertidal, benthic feeding fish, lobsters in the subtidal zone, black ducks, eider ducks, and wadi ...
Marine Ecology Progress Series 224:21
... larger quadrat. Because of their sparse distribution and large size, density estimates of the seastars Heliaster helianthus were obtained through transect counts across the entire bench (of variable length and always 1 m wide), and are presented separately from other carnivore species. Due to the wi ...
... larger quadrat. Because of their sparse distribution and large size, density estimates of the seastars Heliaster helianthus were obtained through transect counts across the entire bench (of variable length and always 1 m wide), and are presented separately from other carnivore species. Due to the wi ...
How do we Measure the Environment? Linking Intertidal Thermal Physiology
... may record temperature maxima that were never experienced by larger organisms. For example, Helmuth and Hofmann (2001) used morphologically and thermally-matched loggers (where mass*specific heat was comparable to live animals) to record long-term temperature records of intertidal mussels, and found ...
... may record temperature maxima that were never experienced by larger organisms. For example, Helmuth and Hofmann (2001) used morphologically and thermally-matched loggers (where mass*specific heat was comparable to live animals) to record long-term temperature records of intertidal mussels, and found ...
Refuges, Biological Disturbance, and Rocky Subtidal Community Structure in New... Author(s): Jon D. Witman
... modiolus, were examined in the rocky subtidal zone off the Isles of Shoals, New Hampshire, USA. Multivariate analysis revealed three major communities between 8 and 30 m in depth: (1) a Modiolus community; (2) a 30 m community; and (3) an 8-18 m community. At all depths, mussel beds contained signif ...
... modiolus, were examined in the rocky subtidal zone off the Isles of Shoals, New Hampshire, USA. Multivariate analysis revealed three major communities between 8 and 30 m in depth: (1) a Modiolus community; (2) a 30 m community; and (3) an 8-18 m community. At all depths, mussel beds contained signif ...
Beds of blue mussels and Pacific oysters
... that are permanently closed. In the subtidal, unstable beds are fished in autumn, stable beds in spring. In Niedersachsen, fishery of seed mus sels is allowed in the subtidal and defined parts of the intertidal, in accordance with the existing management plan, which is revised regularly. In Schlesw ...
... that are permanently closed. In the subtidal, unstable beds are fished in autumn, stable beds in spring. In Niedersachsen, fishery of seed mus sels is allowed in the subtidal and defined parts of the intertidal, in accordance with the existing management plan, which is revised regularly. In Schlesw ...
Intertidal Community Structure: Space
... Lively 1986a, b, Malusa 1986, Lively and Raimondi 1987, Raimondi 1988a, b, 1990, 1991). The carnivoroussnail Acanthina appears to be especially important in structuringthis community (Lively 1986a, Dungan 1987). It makes use of a single spine on the marginof its shell to penetratethe opercularplates ...
... Lively 1986a, b, Malusa 1986, Lively and Raimondi 1987, Raimondi 1988a, b, 1990, 1991). The carnivoroussnail Acanthina appears to be especially important in structuringthis community (Lively 1986a, Dungan 1987). It makes use of a single spine on the marginof its shell to penetratethe opercularplates ...
Distinguishing between direct and indirect effects of predators in
... these species. Predators were added to the plots if required for the treatment at a density of one individual per plot. In treatments where species were removed, there was no experimental compensation for the loss of species, or artificial increase in biomass of remaining species, similar to an addi ...
... these species. Predators were added to the plots if required for the treatment at a density of one individual per plot. In treatments where species were removed, there was no experimental compensation for the loss of species, or artificial increase in biomass of remaining species, similar to an addi ...
DIVERSITY OF A NORTHERN ROCKY INTERTIDAL COMMUNITY
... Notes: The methods are broken down into two large groups: samples processed in the lab and those where measurements were taken in the field. The total count does not equal the number of published studies included, as some studies use more than one method. Field studies commonly used two methods to d ...
... Notes: The methods are broken down into two large groups: samples processed in the lab and those where measurements were taken in the field. The total count does not equal the number of published studies included, as some studies use more than one method. Field studies commonly used two methods to d ...
Mussel
Mussel is the common name used for members of several families of clams or bivalve molluscs, from saltwater and freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other edible clams, which are often more or less rounded or oval.The word ""mussel"" is most frequently used to mean the edible bivalves of the marine family Mytilidae, most of which live on exposed shores in the intertidal zone, attached by means of their strong byssal threads (""beard"") to a firm substrate. A few species (in the genus Bathymodiolus) have colonised hydrothermal vents associated with deep ocean ridges.In most marine mussels the shell is longer than it is wide, being wedge-shaped or asymmetrical. The external colour of the shell is often dark blue, blackish, or brown, while the interior is silvery and somewhat nacreous.The common name ""mussel"" is also used for many freshwater bivalves, including the freshwater pearl mussels. Freshwater mussel species inhabit lakes, ponds, rivers, creeks, canals, and they are classified in a different subclass of bivalves, despite some very superficial similarities in appearance.Freshwater zebra mussels and their relatives in the family Dreissenidae are not related to previously mentioned groups, even though they resemble many Mytilus species in shape, and live attached to rocks and other hard surfaces in a similar manner, using a byssus. They are classified with the Heterodonta, the taxonomic group which includes most of the bivalves commonly referred to as ""clams"".